forked from mirrors/gecko-dev
7147 lines
251 KiB
C++
7147 lines
251 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* rendering object for CSS display:block, inline-block, and list-item
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* boxes, also used for various anonymous boxes
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*/
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#include "nsCOMPtr.h"
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#include "nsBlockFrame.h"
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#include "nsBlockReflowContext.h"
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#include "nsBlockReflowState.h"
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#include "nsBulletFrame.h"
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#include "nsLineBox.h"
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#include "nsInlineFrame.h"
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#include "nsLineLayout.h"
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#include "nsPlaceholderFrame.h"
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#include "nsStyleConsts.h"
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#include "nsFrameManager.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsStyleContext.h"
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#include "nsIView.h"
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#include "nsHTMLParts.h"
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#include "nsGkAtoms.h"
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#include "nsIDOMEvent.h"
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#include "nsGenericHTMLElement.h"
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#include "nsAttrValueInlines.h"
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#include "prprf.h"
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#include "nsStyleChangeList.h"
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#include "nsFrameSelection.h"
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#include "nsFloatManager.h"
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#include "nsIntervalSet.h"
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#include "prenv.h"
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#include "plstr.h"
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#include "nsGUIEvent.h"
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#include "nsError.h"
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#include "nsAutoPtr.h"
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#include "nsIServiceManager.h"
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#include "nsIScrollableFrame.h"
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#ifdef ACCESSIBILITY
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#include "nsIDOMHTMLDocument.h"
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#endif
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#include "nsLayoutUtils.h"
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#include "nsDisplayList.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsCSSRendering.h"
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#include "FrameLayerBuilder.h"
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#include "nsRenderingContext.h"
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#include "TextOverflow.h"
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#include "nsStyleStructInlines.h"
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#include "mozilla/Util.h" // for DebugOnly
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#ifdef IBMBIDI
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#include "nsBidiPresUtils.h"
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#endif // IBMBIDI
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#include "nsIDOMHTMLBodyElement.h"
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#include "nsIDOMHTMLHtmlElement.h"
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static const int MIN_LINES_NEEDING_CURSOR = 20;
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static const PRUnichar kDiscCharacter = 0x2022;
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static const PRUnichar kCircleCharacter = 0x25e6;
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static const PRUnichar kSquareCharacter = 0x25aa;
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#define DISABLE_FLOAT_BREAKING_IN_COLUMNS
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using namespace mozilla;
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using namespace mozilla::css;
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#ifdef DEBUG
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#include "nsBlockDebugFlags.h"
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bool nsBlockFrame::gLamePaintMetrics;
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bool nsBlockFrame::gLameReflowMetrics;
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bool nsBlockFrame::gNoisy;
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bool nsBlockFrame::gNoisyDamageRepair;
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bool nsBlockFrame::gNoisyIntrinsic;
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bool nsBlockFrame::gNoisyReflow;
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bool nsBlockFrame::gReallyNoisyReflow;
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bool nsBlockFrame::gNoisyFloatManager;
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bool nsBlockFrame::gVerifyLines;
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bool nsBlockFrame::gDisableResizeOpt;
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int32_t nsBlockFrame::gNoiseIndent;
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struct BlockDebugFlags {
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const char* name;
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bool* on;
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};
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static const BlockDebugFlags gFlags[] = {
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{ "reflow", &nsBlockFrame::gNoisyReflow },
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{ "really-noisy-reflow", &nsBlockFrame::gReallyNoisyReflow },
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{ "intrinsic", &nsBlockFrame::gNoisyIntrinsic },
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{ "float-manager", &nsBlockFrame::gNoisyFloatManager },
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{ "verify-lines", &nsBlockFrame::gVerifyLines },
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{ "damage-repair", &nsBlockFrame::gNoisyDamageRepair },
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{ "lame-paint-metrics", &nsBlockFrame::gLamePaintMetrics },
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{ "lame-reflow-metrics", &nsBlockFrame::gLameReflowMetrics },
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{ "disable-resize-opt", &nsBlockFrame::gDisableResizeOpt },
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};
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#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
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static void
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ShowDebugFlags()
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{
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printf("Here are the available GECKO_BLOCK_DEBUG_FLAGS:\n");
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const BlockDebugFlags* bdf = gFlags;
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const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
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for (; bdf < end; bdf++) {
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printf(" %s\n", bdf->name);
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}
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printf("Note: GECKO_BLOCK_DEBUG_FLAGS is a comma separated list of flag\n");
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printf("names (no whitespace)\n");
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}
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void
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nsBlockFrame::InitDebugFlags()
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{
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static bool firstTime = true;
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if (firstTime) {
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firstTime = false;
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char* flags = PR_GetEnv("GECKO_BLOCK_DEBUG_FLAGS");
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if (flags) {
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bool error = false;
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for (;;) {
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char* cm = PL_strchr(flags, ',');
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if (cm) *cm = '\0';
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bool found = false;
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const BlockDebugFlags* bdf = gFlags;
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const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
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for (; bdf < end; bdf++) {
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if (PL_strcasecmp(bdf->name, flags) == 0) {
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*(bdf->on) = true;
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printf("nsBlockFrame: setting %s debug flag on\n", bdf->name);
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gNoisy = true;
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found = true;
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break;
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}
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}
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if (!found) {
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error = true;
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}
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if (!cm) break;
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*cm = ',';
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flags = cm + 1;
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}
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if (error) {
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ShowDebugFlags();
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}
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}
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}
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}
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#endif
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// add in a sanity check for absurdly deep frame trees. See bug 42138
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// can't just use IsFrameTreeTooDeep() because that method has side effects we don't want
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#define MAX_DEPTH_FOR_LIST_RENUMBERING 200 // 200 open displayable tags is pretty unrealistic
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//----------------------------------------------------------------------
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// Debugging support code
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#ifdef DEBUG
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const char* nsBlockFrame::kReflowCommandType[] = {
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"ContentChanged",
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"StyleChanged",
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"ReflowDirty",
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"Timeout",
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"UserDefined",
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};
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#endif
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#ifdef REALLY_NOISY_FIRST_LINE
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static void
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DumpStyleGeneaology(nsIFrame* aFrame, const char* gap)
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{
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fputs(gap, stdout);
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nsFrame::ListTag(stdout, aFrame);
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printf(": ");
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nsStyleContext* sc = aFrame->GetStyleContext();
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while (nullptr != sc) {
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nsStyleContext* psc;
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printf("%p ", sc);
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psc = sc->GetParent();
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sc = psc;
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}
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printf("\n");
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}
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#endif
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#ifdef REFLOW_STATUS_COVERAGE
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static void
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RecordReflowStatus(bool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
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{
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static uint32_t record[2];
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// 0: child-is-block
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// 1: child-is-inline
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int index = 0;
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if (!aChildIsBlock) index |= 1;
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// Compute new status
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uint32_t newS = record[index];
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if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
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if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
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newS |= 1;
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}
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else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
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newS |= 2;
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}
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else {
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newS |= 4;
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}
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}
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else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
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newS |= 8;
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}
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else {
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newS |= 16;
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}
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// Log updates to the status that yield different values
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if (record[index] != newS) {
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record[index] = newS;
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printf("record(%d): %02x %02x\n", index, record[0], record[1]);
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}
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}
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#endif
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// Destructor function for the overflowLines frame property
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static void
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DestroyOverflowLines(void* aPropertyValue)
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{
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NS_ERROR("Overflow lines should never be destroyed by the FramePropertyTable");
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}
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NS_DECLARE_FRAME_PROPERTY(OverflowLinesProperty, DestroyOverflowLines)
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NS_DECLARE_FRAME_PROPERTY(OverflowOutOfFlowsProperty,
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nsContainerFrame::DestroyFrameList)
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NS_DECLARE_FRAME_PROPERTY(PushedFloatProperty,
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nsContainerFrame::DestroyFrameList)
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NS_DECLARE_FRAME_PROPERTY(OutsideBulletProperty,
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nsContainerFrame::DestroyFrameList)
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NS_DECLARE_FRAME_PROPERTY(InsideBulletProperty, nullptr)
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//----------------------------------------------------------------------
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nsIFrame*
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NS_NewBlockFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, uint32_t aFlags)
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{
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nsBlockFrame* it = new (aPresShell) nsBlockFrame(aContext);
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if (it) {
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it->SetFlags(aFlags);
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}
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return it;
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsBlockFrame)
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nsBlockFrame::~nsBlockFrame()
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{
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}
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void
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nsBlockFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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ClearLineCursor();
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DestroyAbsoluteFrames(aDestructRoot);
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mFloats.DestroyFramesFrom(aDestructRoot);
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nsPresContext* presContext = PresContext();
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nsLineBox::DeleteLineList(presContext, mLines, aDestructRoot,
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&mFrames);
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nsFrameList* pushedFloats = RemovePushedFloats();
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if (pushedFloats) {
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pushedFloats->DestroyFrom(aDestructRoot);
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}
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// destroy overflow lines now
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FrameLines* overflowLines = RemoveOverflowLines();
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if (overflowLines) {
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nsLineBox::DeleteLineList(presContext, overflowLines->mLines,
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aDestructRoot, &overflowLines->mFrames);
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delete overflowLines;
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}
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{
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nsAutoOOFFrameList oofs(this);
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oofs.mList.DestroyFramesFrom(aDestructRoot);
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// oofs is now empty and will remove the frame list property
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}
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nsBlockFrameSuper::DestroyFrom(aDestructRoot);
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}
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/* virtual */ nsILineIterator*
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nsBlockFrame::GetLineIterator()
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{
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nsLineIterator* it = new nsLineIterator;
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if (!it)
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return nullptr;
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const nsStyleVisibility* visibility = GetStyleVisibility();
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nsresult rv = it->Init(mLines, visibility->mDirection == NS_STYLE_DIRECTION_RTL);
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if (NS_FAILED(rv)) {
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delete it;
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return nullptr;
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}
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return it;
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}
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NS_QUERYFRAME_HEAD(nsBlockFrame)
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NS_QUERYFRAME_ENTRY(nsBlockFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrameSuper)
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nsSplittableType
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nsBlockFrame::GetSplittableType() const
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{
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return NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
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}
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#ifdef DEBUG
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NS_METHOD
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nsBlockFrame::List(FILE* out, int32_t aIndent, uint32_t aFlags) const
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{
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IndentBy(out, aIndent);
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ListTag(out);
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#ifdef DEBUG_waterson
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fprintf(out, " [parent=%p]", mParent);
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#endif
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if (HasView()) {
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fprintf(out, " [view=%p]", static_cast<void*>(GetView()));
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}
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if (GetNextSibling()) {
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fprintf(out, " next=%p", static_cast<void*>(GetNextSibling()));
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}
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// Output the flow linkage
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if (nullptr != GetPrevInFlow()) {
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fprintf(out, " prev-in-flow=%p", static_cast<void*>(GetPrevInFlow()));
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}
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if (nullptr != GetNextInFlow()) {
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fprintf(out, " next-in-flow=%p", static_cast<void*>(GetNextInFlow()));
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}
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void* IBsibling = Properties().Get(IBSplitSpecialSibling());
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if (IBsibling) {
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fprintf(out, " IBSplitSpecialSibling=%p", IBsibling);
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}
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void* IBprevsibling = Properties().Get(IBSplitSpecialPrevSibling());
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if (IBprevsibling) {
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fprintf(out, " IBSplitSpecialPrevSibling=%p", IBprevsibling);
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}
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if (nullptr != mContent) {
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fprintf(out, " [content=%p]", static_cast<void*>(mContent));
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}
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// Output the rect and state
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fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
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if (0 != mState) {
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fprintf(out, " [state=%016llx]", (unsigned long long)mState);
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}
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nsBlockFrame* f = const_cast<nsBlockFrame*>(this);
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if (f->HasOverflowAreas()) {
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nsRect overflowArea = f->GetVisualOverflowRect();
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fprintf(out, " [vis-overflow=%d,%d,%d,%d]", overflowArea.x, overflowArea.y,
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overflowArea.width, overflowArea.height);
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overflowArea = f->GetScrollableOverflowRect();
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fprintf(out, " [scr-overflow=%d,%d,%d,%d]", overflowArea.x, overflowArea.y,
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overflowArea.width, overflowArea.height);
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}
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int32_t numInlineLines = 0;
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int32_t numBlockLines = 0;
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if (!mLines.empty()) {
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const_line_iterator line = begin_lines(), line_end = end_lines();
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for ( ; line != line_end; ++line) {
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if (line->IsBlock())
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numBlockLines++;
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else
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numInlineLines++;
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}
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}
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fprintf(out, " sc=%p(i=%d,b=%d)",
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static_cast<void*>(mStyleContext), numInlineLines, numBlockLines);
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nsIAtom* pseudoTag = mStyleContext->GetPseudo();
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if (pseudoTag) {
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nsAutoString atomString;
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pseudoTag->ToString(atomString);
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fprintf(out, " pst=%s",
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NS_LossyConvertUTF16toASCII(atomString).get());
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}
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if (IsTransformed()) {
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fprintf(out, " transformed");
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}
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if (ChildrenHavePerspective()) {
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fprintf(out, " perspective");
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}
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if (Preserves3DChildren()) {
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fprintf(out, " preserves-3d-children");
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}
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if (Preserves3D()) {
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fprintf(out, " preserves-3d");
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}
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fputs("<\n", out);
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aIndent++;
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// Output the lines
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if (!mLines.empty()) {
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const_line_iterator line = begin_lines(), line_end = end_lines();
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for ( ; line != line_end; ++line) {
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line->List(out, aIndent, aFlags);
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}
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}
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// Output the overflow lines.
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const FrameLines* overflowLines = GetOverflowLines();
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if (overflowLines && !overflowLines->mLines.empty()) {
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IndentBy(out, aIndent);
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fputs("Overflow-lines<\n", out);
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const_line_iterator line = overflowLines->mLines.begin(),
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line_end = overflowLines->mLines.end();
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for ( ; line != line_end; ++line) {
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line->List(out, aIndent + 1, aFlags);
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}
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IndentBy(out, aIndent);
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fputs(">\n", out);
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}
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// skip the principal list - we printed the lines above
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// skip the overflow list - we printed the overflow lines above
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ChildListIterator lists(this);
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ChildListIDs skip(kPrincipalList | kOverflowList);
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for (; !lists.IsDone(); lists.Next()) {
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if (skip.Contains(lists.CurrentID())) {
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continue;
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}
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IndentBy(out, aIndent);
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fprintf(out, "%s<\n", mozilla::layout::ChildListName(lists.CurrentID()));
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nsFrameList::Enumerator childFrames(lists.CurrentList());
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for (; !childFrames.AtEnd(); childFrames.Next()) {
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nsIFrame* kid = childFrames.get();
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kid->List(out, aIndent + 1, aFlags);
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}
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IndentBy(out, aIndent);
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fputs(">\n", out);
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}
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aIndent--;
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IndentBy(out, aIndent);
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fputs(">\n", out);
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return NS_OK;
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}
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NS_IMETHODIMP_(nsFrameState)
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nsBlockFrame::GetDebugStateBits() const
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{
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// We don't want to include our cursor flag in the bits the
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// regression tester looks at
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return nsBlockFrameSuper::GetDebugStateBits() & ~NS_BLOCK_HAS_LINE_CURSOR;
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}
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NS_IMETHODIMP
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nsBlockFrame::GetFrameName(nsAString& aResult) const
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{
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return MakeFrameName(NS_LITERAL_STRING("Block"), aResult);
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}
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#endif
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nsIAtom*
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nsBlockFrame::GetType() const
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{
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return nsGkAtoms::blockFrame;
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}
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nscoord
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nsBlockFrame::GetBaseline() const
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{
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nscoord result;
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if (nsLayoutUtils::GetLastLineBaseline(this, &result))
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return result;
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return nsFrame::GetBaseline();
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}
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nscoord
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nsBlockFrame::GetCaretBaseline() const
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{
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nsRect contentRect = GetContentRect();
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nsMargin bp = GetUsedBorderAndPadding();
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if (!mLines.empty()) {
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const_line_iterator line = begin_lines();
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const nsLineBox* firstLine = line;
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if (firstLine->GetChildCount()) {
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return bp.top + firstLine->mFirstChild->GetCaretBaseline();
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}
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}
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nsRefPtr<nsFontMetrics> fm;
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float inflation = nsLayoutUtils::FontSizeInflationFor(this);
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nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm), inflation);
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return nsLayoutUtils::GetCenteredFontBaseline(fm, nsHTMLReflowState::
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CalcLineHeight(GetStyleContext(), contentRect.height, inflation)) +
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bp.top;
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}
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/////////////////////////////////////////////////////////////////////////////
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// Child frame enumeration
|
|
|
|
const nsFrameList&
|
|
nsBlockFrame::GetChildList(ChildListID aListID) const
|
|
{
|
|
switch (aListID) {
|
|
case kPrincipalList:
|
|
return mFrames;
|
|
case kOverflowList: {
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
return overflowLines ? overflowLines->mFrames : nsFrameList::EmptyList();
|
|
}
|
|
case kFloatList:
|
|
return mFloats;
|
|
case kOverflowOutOfFlowList: {
|
|
const nsFrameList* list = GetOverflowOutOfFlows();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
case kPushedFloatsList: {
|
|
const nsFrameList* list = GetPushedFloats();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
case kBulletList: {
|
|
const nsFrameList* list = GetOutsideBulletList();
|
|
return list ? *list : nsFrameList::EmptyList();
|
|
}
|
|
default:
|
|
return nsContainerFrame::GetChildList(aListID);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::GetChildLists(nsTArray<ChildList>* aLists) const
|
|
{
|
|
nsContainerFrame::GetChildLists(aLists);
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
overflowLines->mFrames.AppendIfNonempty(aLists, kOverflowList);
|
|
}
|
|
const nsFrameList* list = GetOverflowOutOfFlows();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kOverflowOutOfFlowList);
|
|
}
|
|
mFloats.AppendIfNonempty(aLists, kFloatList);
|
|
list = GetOutsideBulletList();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kBulletList);
|
|
}
|
|
list = GetPushedFloats();
|
|
if (list) {
|
|
list->AppendIfNonempty(aLists, kPushedFloatsList);
|
|
}
|
|
}
|
|
|
|
/* virtual */ bool
|
|
nsBlockFrame::IsFloatContainingBlock() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static void
|
|
ReparentFrame(nsIFrame* aFrame, nsIFrame* aOldParent, nsIFrame* aNewParent)
|
|
{
|
|
NS_ASSERTION(aOldParent == aFrame->GetParent(),
|
|
"Parent not consistent with expectations");
|
|
|
|
aFrame->SetParent(aNewParent);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
nsContainerFrame::ReparentFrameView(aFrame->PresContext(), aFrame,
|
|
aOldParent, aNewParent);
|
|
}
|
|
|
|
static void
|
|
ReparentFrames(nsFrameList& aFrameList, nsIFrame* aOldParent,
|
|
nsIFrame* aNewParent)
|
|
{
|
|
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
|
|
ReparentFrame(e.get(), aOldParent, aNewParent);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Remove the first line from aFromLines and adjust the associated frame list
|
|
* aFromFrames accordingly. The removed line is assigned to *aOutLine and
|
|
* a frame list with its frames is assigned to *aOutFrames, i.e. the frames
|
|
* that were extracted from the head of aFromFrames.
|
|
* aFromLines must contain at least one line, the line may be empty.
|
|
* @return true if aFromLines becomes empty
|
|
*/
|
|
static bool
|
|
RemoveFirstLine(nsLineList& aFromLines, nsFrameList& aFromFrames,
|
|
nsLineBox** aOutLine, nsFrameList* aOutFrames)
|
|
{
|
|
nsLineList_iterator removedLine = aFromLines.begin();
|
|
*aOutLine = removedLine;
|
|
nsLineList_iterator next = aFromLines.erase(removedLine);
|
|
bool isLastLine = next == aFromLines.end();
|
|
nsIFrame* lastFrame = isLastLine ? aFromFrames.LastChild()
|
|
: next->mFirstChild->GetPrevSibling();
|
|
nsFrameList::FrameLinkEnumerator linkToBreak(aFromFrames, lastFrame);
|
|
*aOutFrames = aFromFrames.ExtractHead(linkToBreak);
|
|
return isLastLine;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Reflow methods
|
|
|
|
/* virtual */ void
|
|
nsBlockFrame::MarkIntrinsicWidthsDirty()
|
|
{
|
|
nsBlockFrame* dirtyBlock = static_cast<nsBlockFrame*>(GetFirstContinuation());
|
|
dirtyBlock->mMinWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
dirtyBlock->mPrefWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
if (!(GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)) {
|
|
for (nsIFrame* frame = dirtyBlock; frame;
|
|
frame = frame->GetNextContinuation()) {
|
|
frame->AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
|
|
}
|
|
}
|
|
|
|
nsBlockFrameSuper::MarkIntrinsicWidthsDirty();
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CheckIntrinsicCacheAgainstShrinkWrapState()
|
|
{
|
|
nsPresContext *presContext = PresContext();
|
|
if (!nsLayoutUtils::FontSizeInflationEnabled(presContext)) {
|
|
return;
|
|
}
|
|
bool inflationEnabled =
|
|
!presContext->mInflationDisabledForShrinkWrap;
|
|
if (inflationEnabled !=
|
|
!!(GetStateBits() & NS_BLOCK_FRAME_INTRINSICS_INFLATED)) {
|
|
mMinWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
mPrefWidth = NS_INTRINSIC_WIDTH_UNKNOWN;
|
|
if (inflationEnabled) {
|
|
AddStateBits(NS_BLOCK_FRAME_INTRINSICS_INFLATED);
|
|
} else {
|
|
RemoveStateBits(NS_BLOCK_FRAME_INTRINSICS_INFLATED);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsBlockFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nsIFrame* firstInFlow = GetFirstContinuation();
|
|
if (firstInFlow != this)
|
|
return firstInFlow->GetMinWidth(aRenderingContext);
|
|
|
|
DISPLAY_MIN_WIDTH(this, mMinWidth);
|
|
|
|
CheckIntrinsicCacheAgainstShrinkWrapState();
|
|
|
|
if (mMinWidth != NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
return mMinWidth;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": GetMinWidth\n");
|
|
}
|
|
AutoNoisyIndenter indenter(gNoisyIntrinsic);
|
|
#endif
|
|
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
ResolveBidi();
|
|
InlineMinWidthData data;
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
for (line_iterator line = curFrame->begin_lines(), line_end = curFrame->end_lines();
|
|
line != line_end; ++line)
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line (%s%s)\n",
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->IsEmpty() ? ", empty" : "");
|
|
}
|
|
AutoNoisyIndenter lineindent(gNoisyIntrinsic);
|
|
#endif
|
|
if (line->IsBlock()) {
|
|
data.ForceBreak(aRenderingContext);
|
|
data.currentLine = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
|
|
line->mFirstChild, nsLayoutUtils::MIN_WIDTH);
|
|
data.ForceBreak(aRenderingContext);
|
|
} else {
|
|
if (!curFrame->GetPrevContinuation() &&
|
|
line == curFrame->begin_lines()) {
|
|
// Only add text-indent if it has no percentages; using a
|
|
// percentage basis of 0 unconditionally would give strange
|
|
// behavior for calc(10%-3px).
|
|
const nsStyleCoord &indent = GetStyleText()->mTextIndent;
|
|
if (indent.ConvertsToLength())
|
|
data.currentLine += nsRuleNode::ComputeCoordPercentCalc(indent, 0);
|
|
}
|
|
// XXX Bug NNNNNN Should probably handle percentage text-indent.
|
|
|
|
data.line = &line;
|
|
data.lineContainer = curFrame;
|
|
nsIFrame *kid = line->mFirstChild;
|
|
for (int32_t i = 0, i_end = line->GetChildCount(); i != i_end;
|
|
++i, kid = kid->GetNextSibling()) {
|
|
kid->AddInlineMinWidth(aRenderingContext, &data);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("min: [prevLines=%d currentLine=%d]\n",
|
|
data.prevLines, data.currentLine);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
data.ForceBreak(aRenderingContext);
|
|
|
|
mMinWidth = data.prevLines;
|
|
return mMinWidth;
|
|
}
|
|
|
|
/* virtual */ nscoord
|
|
nsBlockFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
|
|
{
|
|
nsIFrame* firstInFlow = GetFirstContinuation();
|
|
if (firstInFlow != this)
|
|
return firstInFlow->GetPrefWidth(aRenderingContext);
|
|
|
|
DISPLAY_PREF_WIDTH(this, mPrefWidth);
|
|
|
|
CheckIntrinsicCacheAgainstShrinkWrapState();
|
|
|
|
if (mPrefWidth != NS_INTRINSIC_WIDTH_UNKNOWN)
|
|
return mPrefWidth;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": GetPrefWidth\n");
|
|
}
|
|
AutoNoisyIndenter indenter(gNoisyIntrinsic);
|
|
#endif
|
|
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
ResolveBidi();
|
|
InlinePrefWidthData data;
|
|
for (nsBlockFrame* curFrame = this; curFrame;
|
|
curFrame = static_cast<nsBlockFrame*>(curFrame->GetNextContinuation())) {
|
|
for (line_iterator line = curFrame->begin_lines(), line_end = curFrame->end_lines();
|
|
line != line_end; ++line)
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line (%s%s)\n",
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->IsEmpty() ? ", empty" : "");
|
|
}
|
|
AutoNoisyIndenter lineindent(gNoisyIntrinsic);
|
|
#endif
|
|
if (line->IsBlock()) {
|
|
data.ForceBreak(aRenderingContext);
|
|
data.currentLine = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
|
|
line->mFirstChild, nsLayoutUtils::PREF_WIDTH);
|
|
data.ForceBreak(aRenderingContext);
|
|
} else {
|
|
if (!curFrame->GetPrevContinuation() &&
|
|
line == curFrame->begin_lines()) {
|
|
// Only add text-indent if it has no percentages; using a
|
|
// percentage basis of 0 unconditionally would give strange
|
|
// behavior for calc(10%-3px).
|
|
const nsStyleCoord &indent = GetStyleText()->mTextIndent;
|
|
if (indent.ConvertsToLength())
|
|
data.currentLine += nsRuleNode::ComputeCoordPercentCalc(indent, 0);
|
|
}
|
|
// XXX Bug NNNNNN Should probably handle percentage text-indent.
|
|
|
|
data.line = &line;
|
|
data.lineContainer = curFrame;
|
|
nsIFrame *kid = line->mFirstChild;
|
|
for (int32_t i = 0, i_end = line->GetChildCount(); i != i_end;
|
|
++i, kid = kid->GetNextSibling()) {
|
|
kid->AddInlinePrefWidth(aRenderingContext, &data);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyIntrinsic) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("pref: [prevLines=%d currentLine=%d]\n",
|
|
data.prevLines, data.currentLine);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
data.ForceBreak(aRenderingContext);
|
|
|
|
mPrefWidth = data.prevLines;
|
|
return mPrefWidth;
|
|
}
|
|
|
|
nsRect
|
|
nsBlockFrame::ComputeTightBounds(gfxContext* aContext) const
|
|
{
|
|
// be conservative
|
|
if (GetStyleContext()->HasTextDecorationLines()) {
|
|
return GetVisualOverflowRect();
|
|
}
|
|
return ComputeSimpleTightBounds(aContext);
|
|
}
|
|
|
|
static bool
|
|
AvailableSpaceShrunk(const nsRect& aOldAvailableSpace,
|
|
const nsRect& aNewAvailableSpace)
|
|
{
|
|
if (aNewAvailableSpace.width == 0) {
|
|
// Positions are not significant if the width is zero.
|
|
return aOldAvailableSpace.width != 0;
|
|
}
|
|
NS_ASSERTION(aOldAvailableSpace.x <= aNewAvailableSpace.x &&
|
|
aOldAvailableSpace.XMost() >= aNewAvailableSpace.XMost(),
|
|
"available space should never grow");
|
|
return aOldAvailableSpace.width != aNewAvailableSpace.width;
|
|
}
|
|
|
|
static nsSize
|
|
CalculateContainingBlockSizeForAbsolutes(const nsHTMLReflowState& aReflowState,
|
|
nsSize aFrameSize)
|
|
{
|
|
// The issue here is that for a 'height' of 'auto' the reflow state
|
|
// code won't know how to calculate the containing block height
|
|
// because it's calculated bottom up. So we use our own computed
|
|
// size as the dimensions.
|
|
nsIFrame* frame = aReflowState.frame;
|
|
|
|
nsSize cbSize(aFrameSize);
|
|
// Containing block is relative to the padding edge
|
|
const nsMargin& border =
|
|
aReflowState.mComputedBorderPadding - aReflowState.mComputedPadding;
|
|
cbSize.width -= border.LeftRight();
|
|
cbSize.height -= border.TopBottom();
|
|
|
|
if (frame->GetParent()->GetContent() == frame->GetContent() &&
|
|
frame->GetParent()->GetType() != nsGkAtoms::canvasFrame) {
|
|
// We are a wrapped frame for the content (and the wrapper is not the
|
|
// canvas frame, whose size is not meaningful here).
|
|
// Use the container's dimensions, if they have been precomputed.
|
|
// XXX This is a hack! We really should be waiting until the outermost
|
|
// frame is fully reflowed and using the resulting dimensions, even
|
|
// if they're intrinsic.
|
|
// In fact we should be attaching absolute children to the outermost
|
|
// frame and not always sticking them in block frames.
|
|
|
|
// First, find the reflow state for the outermost frame for this
|
|
// content.
|
|
const nsHTMLReflowState* aLastRS = &aReflowState;
|
|
const nsHTMLReflowState* lastButOneRS = &aReflowState;
|
|
while (aLastRS->parentReflowState &&
|
|
aLastRS->parentReflowState->frame->GetContent() == frame->GetContent()) {
|
|
lastButOneRS = aLastRS;
|
|
aLastRS = aLastRS->parentReflowState;
|
|
}
|
|
if (aLastRS != &aReflowState) {
|
|
// Scrollbars need to be specifically excluded, if present, because they are outside the
|
|
// padding-edge. We need better APIs for getting the various boxes from a frame.
|
|
nsIScrollableFrame* scrollFrame = do_QueryFrame(aLastRS->frame);
|
|
nsMargin scrollbars(0,0,0,0);
|
|
if (scrollFrame) {
|
|
scrollbars =
|
|
scrollFrame->GetDesiredScrollbarSizes(aLastRS->frame->PresContext(),
|
|
aLastRS->rendContext);
|
|
if (!lastButOneRS->mFlags.mAssumingHScrollbar) {
|
|
scrollbars.top = scrollbars.bottom = 0;
|
|
}
|
|
if (!lastButOneRS->mFlags.mAssumingVScrollbar) {
|
|
scrollbars.left = scrollbars.right = 0;
|
|
}
|
|
}
|
|
// We found a reflow state for the outermost wrapping frame, so use
|
|
// its computed metrics if available
|
|
if (aLastRS->ComputedWidth() != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.width = NS_MAX(0,
|
|
aLastRS->ComputedWidth() + aLastRS->mComputedPadding.LeftRight() - scrollbars.LeftRight());
|
|
}
|
|
if (aLastRS->ComputedHeight() != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.height = NS_MAX(0,
|
|
aLastRS->ComputedHeight() + aLastRS->mComputedPadding.TopBottom() - scrollbars.TopBottom());
|
|
}
|
|
}
|
|
}
|
|
|
|
return cbSize;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame");
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": begin reflow availSize=%d,%d computedSize=%d,%d\n",
|
|
aReflowState.availableWidth, aReflowState.availableHeight,
|
|
aReflowState.ComputedWidth(), aReflowState.ComputedHeight());
|
|
}
|
|
AutoNoisyIndenter indent(gNoisy);
|
|
PRTime start = LL_ZERO; // Initialize these variablies to silence the compiler.
|
|
int32_t ctc = 0; // We only use these if they are set (gLameReflowMetrics).
|
|
if (gLameReflowMetrics) {
|
|
start = PR_Now();
|
|
ctc = nsLineBox::GetCtorCount();
|
|
}
|
|
#endif
|
|
|
|
const nsHTMLReflowState *reflowState = &aReflowState;
|
|
nsAutoPtr<nsHTMLReflowState> mutableReflowState;
|
|
// If we have non-auto height, we're clipping our kids and we fit,
|
|
// make sure our kids fit too.
|
|
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE &&
|
|
aReflowState.ComputedHeight() != NS_AUTOHEIGHT &&
|
|
ApplyOverflowClipping(this, aReflowState.mStyleDisplay)) {
|
|
nsMargin heightExtras = aReflowState.mComputedBorderPadding;
|
|
if (GetSkipSides() & NS_SIDE_TOP) {
|
|
heightExtras.top = 0;
|
|
} else {
|
|
// Bottom margin never causes us to create continuations, so we
|
|
// don't need to worry about whether it fits in its entirety.
|
|
heightExtras.top += aReflowState.mComputedMargin.top;
|
|
}
|
|
|
|
if (GetEffectiveComputedHeight(aReflowState) + heightExtras.TopBottom() <=
|
|
aReflowState.availableHeight) {
|
|
mutableReflowState = new nsHTMLReflowState(aReflowState);
|
|
mutableReflowState->availableHeight = NS_UNCONSTRAINEDSIZE;
|
|
reflowState = mutableReflowState;
|
|
}
|
|
}
|
|
|
|
// See comment below about oldSize. Use *only* for the
|
|
// abs-pos-containing-block-size-change optimization!
|
|
nsSize oldSize = GetSize();
|
|
|
|
// Should we create a float manager?
|
|
nsAutoFloatManager autoFloatManager(const_cast<nsHTMLReflowState&>(*reflowState));
|
|
|
|
// XXXldb If we start storing the float manager in the frame rather
|
|
// than keeping it around only during reflow then we should create it
|
|
// only when there are actually floats to manage. Otherwise things
|
|
// like tables will gain significant bloat.
|
|
bool needFloatManager = nsBlockFrame::BlockNeedsFloatManager(this);
|
|
if (needFloatManager)
|
|
autoFloatManager.CreateFloatManager(aPresContext);
|
|
|
|
// OK, some lines may be reflowed. Blow away any saved line cursor
|
|
// because we may invalidate the nondecreasing
|
|
// overflowArea.VisualOverflow().y/yMost invariant, and we may even
|
|
// delete the line with the line cursor.
|
|
ClearLineCursor();
|
|
|
|
if (IsFrameTreeTooDeep(*reflowState, aMetrics, aStatus)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
bool topMarginRoot, bottomMarginRoot;
|
|
IsMarginRoot(&topMarginRoot, &bottomMarginRoot);
|
|
nsBlockReflowState state(*reflowState, aPresContext, this, aMetrics,
|
|
topMarginRoot, bottomMarginRoot, needFloatManager);
|
|
|
|
#ifdef IBMBIDI
|
|
if (GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
static_cast<nsBlockFrame*>(GetFirstContinuation())->ResolveBidi();
|
|
#endif // IBMBIDI
|
|
|
|
if (RenumberLists(aPresContext)) {
|
|
AddStateBits(NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
// ALWAYS drain overflow. We never want to leave the previnflow's
|
|
// overflow lines hanging around; block reflow depends on the
|
|
// overflow line lists being cleared out between reflow passes.
|
|
DrainOverflowLines();
|
|
|
|
// Handle paginated overflow (see nsContainerFrame.h)
|
|
nsOverflowAreas ocBounds;
|
|
nsReflowStatus ocStatus = NS_FRAME_COMPLETE;
|
|
if (GetPrevInFlow()) {
|
|
ReflowOverflowContainerChildren(aPresContext, *reflowState, ocBounds, 0,
|
|
ocStatus);
|
|
}
|
|
|
|
// Now that we're done cleaning up our overflow container lists, we can
|
|
// give |state| its nsOverflowContinuationTracker.
|
|
nsOverflowContinuationTracker tracker(aPresContext, this, false);
|
|
state.mOverflowTracker = &tracker;
|
|
|
|
// Drain & handle pushed floats
|
|
DrainPushedFloats(state);
|
|
nsOverflowAreas fcBounds;
|
|
nsReflowStatus fcStatus = NS_FRAME_COMPLETE;
|
|
rv = ReflowPushedFloats(state, fcBounds, fcStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If we're not dirty (which means we'll mark everything dirty later)
|
|
// and our width has changed, mark the lines dirty that we need to
|
|
// mark dirty for a resize reflow.
|
|
if (reflowState->mFlags.mHResize)
|
|
PrepareResizeReflow(state);
|
|
|
|
mState &= ~NS_FRAME_FIRST_REFLOW;
|
|
|
|
// Now reflow...
|
|
rv = ReflowDirtyLines(state);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "reflow dirty lines failed");
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
NS_MergeReflowStatusInto(&state.mReflowStatus, ocStatus);
|
|
NS_MergeReflowStatusInto(&state.mReflowStatus, fcStatus);
|
|
|
|
// If we end in a BR with clear and affected floats continue,
|
|
// we need to continue, too.
|
|
if (NS_UNCONSTRAINEDSIZE != reflowState->availableHeight &&
|
|
NS_FRAME_IS_COMPLETE(state.mReflowStatus) &&
|
|
state.mFloatManager->ClearContinues(FindTrailingClear())) {
|
|
NS_FRAME_SET_INCOMPLETE(state.mReflowStatus);
|
|
}
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(state.mReflowStatus)) {
|
|
if (HasOverflowLines() || HasPushedFloats()) {
|
|
state.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
#ifdef DEBUG_kipp
|
|
ListTag(stdout); printf(": block is not fully complete\n");
|
|
#endif
|
|
}
|
|
|
|
CheckFloats(state);
|
|
|
|
// Place the "marker" (bullet) frame if it is placed next to a block
|
|
// child.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. It's only placed on the second line in a
|
|
// rare case: an empty first line followed by a second line that
|
|
// contains a block (example: <LI>\n<P>... ). This is where
|
|
// the second case can happen.
|
|
if (HasOutsideBullet() && !mLines.empty() &&
|
|
(mLines.front()->IsBlock() ||
|
|
(0 == mLines.front()->mBounds.height &&
|
|
mLines.front() != mLines.back() &&
|
|
mLines.begin().next()->IsBlock()))) {
|
|
// Reflow the bullet
|
|
nsHTMLReflowMetrics metrics;
|
|
// XXX Use the entire line when we fix bug 25888.
|
|
nsLayoutUtils::LinePosition position;
|
|
bool havePosition = nsLayoutUtils::GetFirstLinePosition(this, &position);
|
|
nscoord lineTop = havePosition ? position.mTop
|
|
: reflowState->mComputedBorderPadding.top;
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
ReflowBullet(bullet, state, metrics, lineTop);
|
|
NS_ASSERTION(!BulletIsEmpty() || metrics.height == 0,
|
|
"empty bullet took up space");
|
|
|
|
if (havePosition && !BulletIsEmpty()) {
|
|
// We have some lines to align the bullet with.
|
|
|
|
// Doing the alignment using the baseline will also cater for
|
|
// bullets that are placed next to a child block (bug 92896)
|
|
|
|
// Tall bullets won't look particularly nice here...
|
|
nsRect bbox = bullet->GetRect();
|
|
bbox.y = position.mBaseline - metrics.ascent;
|
|
bullet->SetRect(bbox);
|
|
}
|
|
// Otherwise just leave the bullet where it is, up against our top padding.
|
|
}
|
|
|
|
// Compute our final size
|
|
nscoord bottomEdgeOfChildren;
|
|
ComputeFinalSize(*reflowState, state, aMetrics, &bottomEdgeOfChildren);
|
|
nsRect areaBounds = nsRect(0, 0, aMetrics.width, aMetrics.height);
|
|
ComputeOverflowAreas(areaBounds, reflowState->mStyleDisplay,
|
|
bottomEdgeOfChildren, aMetrics.mOverflowAreas);
|
|
// Factor overflow container child bounds into the overflow area
|
|
aMetrics.mOverflowAreas.UnionWith(ocBounds);
|
|
// Factor pushed float child bounds into the overflow area
|
|
aMetrics.mOverflowAreas.UnionWith(fcBounds);
|
|
|
|
// Let the absolutely positioned container reflow any absolutely positioned
|
|
// child frames that need to be reflowed, e.g., elements with a percentage
|
|
// based width/height
|
|
// We want to do this under either of two conditions:
|
|
// 1. If we didn't do the incremental reflow above.
|
|
// 2. If our size changed.
|
|
// Even though it's the padding edge that's the containing block, we
|
|
// can use our rect (the border edge) since if the border style
|
|
// changed, the reflow would have been targeted at us so we'd satisfy
|
|
// condition 1.
|
|
// XXX checking oldSize is bogus, there are various reasons we might have
|
|
// reflowed but our size might not have been changed to what we
|
|
// asked for (e.g., we ended up being pushed to a new page)
|
|
// When WillReflowAgainForClearance is true, we will reflow again without
|
|
// resetting the size. Because of this, we must not reflow our abs-pos children
|
|
// in that situation --- what we think is our "new size"
|
|
// will not be our real new size. This also happens to be more efficient.
|
|
if (HasAbsolutelyPositionedChildren()) {
|
|
nsAbsoluteContainingBlock* absoluteContainer = GetAbsoluteContainingBlock();
|
|
bool haveInterrupt = aPresContext->HasPendingInterrupt();
|
|
if (reflowState->WillReflowAgainForClearance() ||
|
|
haveInterrupt) {
|
|
// Make sure that when we reflow again we'll actually reflow all the abs
|
|
// pos frames that might conceivably depend on our size (or all of them,
|
|
// if we're dirty right now and interrupted; in that case we also need
|
|
// to mark them all with NS_FRAME_IS_DIRTY). Sadly, we can't do much
|
|
// better than that, because we don't really know what our size will be,
|
|
// and it might in fact not change on the followup reflow!
|
|
if (haveInterrupt && (GetStateBits() & NS_FRAME_IS_DIRTY)) {
|
|
absoluteContainer->MarkAllFramesDirty();
|
|
} else {
|
|
absoluteContainer->MarkSizeDependentFramesDirty();
|
|
}
|
|
} else {
|
|
nsSize containingBlockSize =
|
|
CalculateContainingBlockSizeForAbsolutes(*reflowState,
|
|
nsSize(aMetrics.width,
|
|
aMetrics.height));
|
|
|
|
// Mark frames that depend on changes we just made to this frame as dirty:
|
|
// Now we can assume that the padding edge hasn't moved.
|
|
// We need to reflow the absolutes if one of them depends on
|
|
// its placeholder position, or the containing block size in a
|
|
// direction in which the containing block size might have
|
|
// changed.
|
|
bool cbWidthChanged = aMetrics.width != oldSize.width;
|
|
bool isRoot = !GetContent()->GetParent();
|
|
// If isRoot and we have auto height, then we are the initial
|
|
// containing block and the containing block height is the
|
|
// viewport height, which can't change during incremental
|
|
// reflow.
|
|
bool cbHeightChanged =
|
|
!(isRoot && NS_UNCONSTRAINEDSIZE == reflowState->ComputedHeight()) &&
|
|
aMetrics.height != oldSize.height;
|
|
|
|
absoluteContainer->Reflow(this, aPresContext, *reflowState,
|
|
state.mReflowStatus,
|
|
containingBlockSize.width,
|
|
containingBlockSize.height, true,
|
|
cbWidthChanged, cbHeightChanged,
|
|
&aMetrics.mOverflowAreas);
|
|
|
|
//XXXfr Why isn't this rv (and others in this file) checked/returned?
|
|
}
|
|
}
|
|
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
// Clear the float manager pointer in the block reflow state so we
|
|
// don't waste time translating the coordinate system back on a dead
|
|
// float manager.
|
|
if (needFloatManager)
|
|
state.mFloatManager = nullptr;
|
|
|
|
aStatus = state.mReflowStatus;
|
|
|
|
#ifdef DEBUG
|
|
// Between when we drain pushed floats and when we complete reflow,
|
|
// we're allowed to have multiple continuations of the same float on
|
|
// our floats list, since a first-in-flow might get pushed to a later
|
|
// continuation of its containing block. But it's not permitted
|
|
// outside that time.
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(this, mFloats);
|
|
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
|
|
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
|
|
aMetrics.width, aMetrics.height,
|
|
aMetrics.mCarriedOutBottomMargin.get());
|
|
if (HasOverflowAreas()) {
|
|
printf(" overflow-vis={%d,%d,%d,%d}",
|
|
aMetrics.VisualOverflow().x,
|
|
aMetrics.VisualOverflow().y,
|
|
aMetrics.VisualOverflow().width,
|
|
aMetrics.VisualOverflow().height);
|
|
printf(" overflow-scr={%d,%d,%d,%d}",
|
|
aMetrics.ScrollableOverflow().x,
|
|
aMetrics.ScrollableOverflow().y,
|
|
aMetrics.ScrollableOverflow().width,
|
|
aMetrics.ScrollableOverflow().height);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
if (gLameReflowMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
int32_t ectc = nsLineBox::GetCtorCount();
|
|
int32_t numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime delta, perLineDelta, lines;
|
|
lines = int64_t(numLines);
|
|
delta = end - start;
|
|
perLineDelta = delta / lines;
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
PR_snprintf(buf, sizeof(buf),
|
|
": %lld elapsed (%lld per line) (%d lines; %d new lines)",
|
|
delta, perLineDelta, numLines, ectc - ctc);
|
|
printf("%s\n", buf);
|
|
}
|
|
#endif
|
|
|
|
NS_FRAME_SET_TRUNCATION(aStatus, (*reflowState), aMetrics);
|
|
return rv;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::CheckForCollapsedBottomMarginFromClearanceLine()
|
|
{
|
|
line_iterator begin = begin_lines();
|
|
line_iterator line = end_lines();
|
|
|
|
while (true) {
|
|
if (begin == line) {
|
|
return false;
|
|
}
|
|
--line;
|
|
if (line->mBounds.height != 0 || !line->CachedIsEmpty()) {
|
|
return false;
|
|
}
|
|
if (line->HasClearance()) {
|
|
return true;
|
|
}
|
|
}
|
|
// not reached
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeFinalSize(const nsHTMLReflowState& aReflowState,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nscoord* aBottomEdgeOfChildren)
|
|
{
|
|
const nsMargin& borderPadding = aState.BorderPadding();
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": mY=%d mIsBottomMarginRoot=%s mPrevBottomMargin=%d bp=%d,%d\n",
|
|
aState.mY, aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ? "yes" : "no",
|
|
aState.mPrevBottomMargin,
|
|
borderPadding.top, borderPadding.bottom);
|
|
#endif
|
|
|
|
// Compute final width
|
|
aMetrics.width =
|
|
NSCoordSaturatingAdd(NSCoordSaturatingAdd(borderPadding.left,
|
|
aReflowState.ComputedWidth()),
|
|
borderPadding.right);
|
|
|
|
// Return bottom margin information
|
|
// rbs says he hit this assertion occasionally (see bug 86947), so
|
|
// just set the margin to zero and we'll figure out why later
|
|
//NS_ASSERTION(aMetrics.mCarriedOutBottomMargin.IsZero(),
|
|
// "someone else set the margin");
|
|
nscoord nonCarriedOutVerticalMargin = 0;
|
|
if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
|
|
// Apply rule from CSS 2.1 section 8.3.1. If we have some empty
|
|
// line with clearance and a non-zero top margin and all
|
|
// subsequent lines are empty, then we do not allow our children's
|
|
// carried out bottom margin to be carried out of us and collapse
|
|
// with our own bottom margin.
|
|
if (CheckForCollapsedBottomMarginFromClearanceLine()) {
|
|
// Convert the children's carried out margin to something that
|
|
// we will include in our height
|
|
nonCarriedOutVerticalMargin = aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
|
|
} else {
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
|
|
nscoord bottomEdgeOfChildren = aState.mY + nonCarriedOutVerticalMargin;
|
|
// Shrink wrap our height around our contents.
|
|
if (aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ||
|
|
NS_UNCONSTRAINEDSIZE != aReflowState.ComputedHeight()) {
|
|
// When we are a bottom-margin root make sure that our last
|
|
// childs bottom margin is fully applied. We also do this when
|
|
// we have a computed height, since in that case the carried out
|
|
// margin is not going to be applied anywhere, so we should note it
|
|
// here to be included in the overflow area.
|
|
// Apply the margin only if there's space for it.
|
|
if (bottomEdgeOfChildren < aState.mReflowState.availableHeight)
|
|
{
|
|
// Truncate bottom margin if it doesn't fit to our available height.
|
|
bottomEdgeOfChildren =
|
|
NS_MIN(bottomEdgeOfChildren + aState.mPrevBottomMargin.get(),
|
|
aState.mReflowState.availableHeight);
|
|
}
|
|
}
|
|
if (aState.GetFlag(BRS_FLOAT_MGR)) {
|
|
// Include the float manager's state to properly account for the
|
|
// bottom margin of any floated elements; e.g., inside a table cell.
|
|
nscoord floatHeight =
|
|
aState.ClearFloats(bottomEdgeOfChildren, NS_STYLE_CLEAR_LEFT_AND_RIGHT,
|
|
nullptr, nsFloatManager::DONT_CLEAR_PUSHED_FLOATS);
|
|
bottomEdgeOfChildren = NS_MAX(bottomEdgeOfChildren, floatHeight);
|
|
}
|
|
|
|
// Compute final height
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.ComputedHeight()) {
|
|
// Figure out how much of the computed height should be
|
|
// applied to this frame.
|
|
nscoord computedHeightLeftOver = GetEffectiveComputedHeight(aReflowState);
|
|
NS_ASSERTION(!( IS_TRUE_OVERFLOW_CONTAINER(this)
|
|
&& computedHeightLeftOver ),
|
|
"overflow container must not have computedHeightLeftOver");
|
|
|
|
aMetrics.height =
|
|
NSCoordSaturatingAdd(NSCoordSaturatingAdd(borderPadding.top,
|
|
computedHeightLeftOver),
|
|
borderPadding.bottom);
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)
|
|
&& aMetrics.height < aReflowState.availableHeight) {
|
|
// We ran out of height on this page but we're incomplete
|
|
// Set status to complete except for overflow
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
if (NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
if (computedHeightLeftOver > 0 &&
|
|
NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight &&
|
|
aMetrics.height > aReflowState.availableHeight) {
|
|
// We don't fit and we consumed some of the computed height,
|
|
// so we should consume all the available height and then
|
|
// break. If our bottom border/padding straddles the break
|
|
// point, then this will increase our height and push the
|
|
// border/padding to the next page/column.
|
|
aMetrics.height = NS_MAX(aReflowState.availableHeight,
|
|
aState.mY + nonCarriedOutVerticalMargin);
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
if (!GetNextInFlow())
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
else {
|
|
// Use the current height; continuations will take up the rest.
|
|
// Do extend the height to at least consume the available
|
|
// height, otherwise our left/right borders (for example) won't
|
|
// extend all the way to the break.
|
|
aMetrics.height = NS_MAX(aReflowState.availableHeight,
|
|
aState.mY + nonCarriedOutVerticalMargin);
|
|
// ... but don't take up more height than is available
|
|
aMetrics.height = NS_MIN(aMetrics.height,
|
|
borderPadding.top + computedHeightLeftOver);
|
|
// XXX It's pretty wrong that our bottom border still gets drawn on
|
|
// on its own on the last-in-flow, even if we ran out of height
|
|
// here. We need GetSkipSides to check whether we ran out of content
|
|
// height in the current frame, not whether it's last-in-flow.
|
|
}
|
|
|
|
// Don't carry out a bottom margin when our height is fixed.
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
else if (NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
nscoord contentHeight = bottomEdgeOfChildren - borderPadding.top;
|
|
nscoord autoHeight = aReflowState.ApplyMinMaxHeight(contentHeight);
|
|
if (autoHeight != contentHeight) {
|
|
// Our min-height or max-height made our height change. Don't carry out
|
|
// our kids' bottom margins.
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
autoHeight += borderPadding.top + borderPadding.bottom;
|
|
aMetrics.height = autoHeight;
|
|
}
|
|
else {
|
|
NS_ASSERTION(aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE,
|
|
"Shouldn't be incomplete if availableHeight is UNCONSTRAINED.");
|
|
aMetrics.height = NS_MAX(aState.mY, aReflowState.availableHeight);
|
|
if (aReflowState.availableHeight == NS_UNCONSTRAINEDSIZE)
|
|
// This should never happen, but it does. See bug 414255
|
|
aMetrics.height = aState.mY;
|
|
}
|
|
|
|
if (IS_TRUE_OVERFLOW_CONTAINER(this) &&
|
|
NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)) {
|
|
// Overflow containers can only be overflow complete.
|
|
// Note that auto height overflow containers have no normal children
|
|
NS_ASSERTION(aMetrics.height == 0, "overflow containers must be zero-height");
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
// Screen out negative heights --- can happen due to integer overflows :-(
|
|
aMetrics.height = NS_MAX(0, aMetrics.height);
|
|
*aBottomEdgeOfChildren = bottomEdgeOfChildren;
|
|
|
|
#ifdef DEBUG_blocks
|
|
if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeOverflowAreas(const nsRect& aBounds,
|
|
const nsStyleDisplay* aDisplay,
|
|
nscoord aBottomEdgeOfChildren,
|
|
nsOverflowAreas& aOverflowAreas)
|
|
{
|
|
// Compute the overflow areas of our children
|
|
// XXX_perf: This can be done incrementally. It is currently one of
|
|
// the things that makes incremental reflow O(N^2).
|
|
nsOverflowAreas areas(aBounds, aBounds);
|
|
if (!ApplyOverflowClipping(this, aDisplay)) {
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
areas.UnionWith(line->GetOverflowAreas());
|
|
}
|
|
|
|
// Factor an outside bullet in; normally the bullet will be factored into
|
|
// the line-box's overflow areas. However, if the line is a block
|
|
// line then it won't; if there are no lines, it won't. So just
|
|
// factor it in anyway (it can't hurt if it was already done).
|
|
// XXXldb Can we just fix GetOverflowArea instead?
|
|
nsIFrame* outsideBullet = GetOutsideBullet();
|
|
if (outsideBullet) {
|
|
areas.UnionAllWith(outsideBullet->GetRect());
|
|
}
|
|
|
|
// Factor in the bottom edge of the children. Child frames will be added
|
|
// to the overflow area as we iterate through the lines, but their margins
|
|
// won't, so we need to account for bottom margins here.
|
|
// REVIEW: For now, we do this for both visual and scrollable area,
|
|
// although when we make scrollable overflow area not be a subset of
|
|
// visual, we can change this.
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect& o = areas.Overflow(otype);
|
|
o.height = NS_MAX(o.YMost(), aBottomEdgeOfChildren) - o.y;
|
|
}
|
|
}
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
printf(": ca=%d,%d,%d,%d\n", area.x, area.y, area.width, area.height);
|
|
#endif
|
|
|
|
aOverflowAreas = areas;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::UpdateOverflow()
|
|
{
|
|
// We need to update the overflow areas of lines manually, as they
|
|
// get cached and re-used otherwise. Lines aren't exposed as normal
|
|
// frame children, so calling UnionChildOverflow alone will end up
|
|
// using the old cached values.
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
nsOverflowAreas lineAreas;
|
|
|
|
int32_t n = line->GetChildCount();
|
|
for (nsIFrame* lineFrame = line->mFirstChild;
|
|
n > 0; lineFrame = lineFrame->GetNextSibling(), --n) {
|
|
ConsiderChildOverflow(lineAreas, lineFrame);
|
|
}
|
|
|
|
line->SetOverflowAreas(lineAreas);
|
|
}
|
|
|
|
return nsBlockFrameSuper::UpdateOverflow();
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MarkLineDirty(line_iterator aLine, const nsLineList* aLineList)
|
|
{
|
|
// Mark aLine dirty
|
|
aLine->MarkDirty();
|
|
aLine->SetInvalidateTextRuns(true);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark line %p dirty\n", static_cast<void*>(aLine.get()));
|
|
}
|
|
#endif
|
|
|
|
// Mark previous line dirty if it's an inline line so that it can
|
|
// maybe pullup something from the line just affected.
|
|
// XXX We don't need to do this if aPrevLine ends in a break-after...
|
|
if (aLine != aLineList->front() && aLine->IsInline() &&
|
|
aLine.prev()->IsInline()) {
|
|
aLine.prev()->MarkDirty();
|
|
aLine.prev()->SetInvalidateTextRuns(true);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark prev-line %p dirty\n",
|
|
static_cast<void*>(aLine.prev().get()));
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Test whether lines are certain to be aligned left so that we can make
|
|
* resizing optimizations
|
|
*/
|
|
static inline bool
|
|
IsAlignedLeft(uint8_t aAlignment,
|
|
uint8_t aDirection,
|
|
uint8_t aUnicodeBidi,
|
|
nsIFrame* aFrame)
|
|
{
|
|
return aFrame->IsSVGText() ||
|
|
NS_STYLE_TEXT_ALIGN_LEFT == aAlignment ||
|
|
(((NS_STYLE_TEXT_ALIGN_DEFAULT == aAlignment &&
|
|
NS_STYLE_DIRECTION_LTR == aDirection) ||
|
|
(NS_STYLE_TEXT_ALIGN_END == aAlignment &&
|
|
NS_STYLE_DIRECTION_RTL == aDirection)) &&
|
|
!(NS_STYLE_UNICODE_BIDI_PLAINTEXT & aUnicodeBidi));
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
|
|
{
|
|
const nsStyleText* styleText = GetStyleText();
|
|
const nsStyleTextReset* styleTextReset = GetStyleTextReset();
|
|
// See if we can try and avoid marking all the lines as dirty
|
|
bool tryAndSkipLines =
|
|
// The text must be left-aligned.
|
|
IsAlignedLeft(styleText->mTextAlign,
|
|
aState.mReflowState.mStyleVisibility->mDirection,
|
|
styleTextReset->mUnicodeBidi,
|
|
this) &&
|
|
// The left content-edge must be a constant distance from the left
|
|
// border-edge.
|
|
!GetStylePadding()->mPadding.GetLeft().HasPercent();
|
|
|
|
#ifdef DEBUG
|
|
if (gDisableResizeOpt) {
|
|
tryAndSkipLines = false;
|
|
}
|
|
if (gNoisyReflow) {
|
|
if (!tryAndSkipLines) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": marking all lines dirty: availWidth=%d textAlign=%d\n",
|
|
aState.mReflowState.availableWidth,
|
|
styleText->mTextAlign);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (tryAndSkipLines) {
|
|
nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left +
|
|
aState.mReflowState.ComputedWidth();
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedBorderPadding.left &&
|
|
NS_UNCONSTRAINEDSIZE != aState.mReflowState.ComputedWidth(),
|
|
"math on NS_UNCONSTRAINEDSIZE");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": trying to avoid marking all lines dirty\n");
|
|
}
|
|
#endif
|
|
|
|
// The last line might not be aligned left even if the rest of the block is
|
|
bool skipLastLine = NS_STYLE_TEXT_ALIGN_AUTO == styleText->mTextAlignLast ||
|
|
IsAlignedLeft(styleText->mTextAlignLast,
|
|
aState.mReflowState.mStyleVisibility->mDirection,
|
|
styleTextReset->mUnicodeBidi,
|
|
this);
|
|
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
// We let child blocks make their own decisions the same
|
|
// way we are here.
|
|
bool isLastLine = line == mLines.back() && !GetNextInFlow();
|
|
if (line->IsBlock() ||
|
|
line->HasFloats() ||
|
|
(!isLastLine && !line->HasBreakAfter()) ||
|
|
((isLastLine || !line->IsLineWrapped()) && !skipLastLine) ||
|
|
line->ResizeReflowOptimizationDisabled() ||
|
|
line->IsImpactedByFloat() ||
|
|
(line->mBounds.XMost() > newAvailWidth)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
if (!line->IsBlock()) {
|
|
printf("PrepareResizeReflow thinks line %p is %simpacted by floats\n",
|
|
line.get(), line->IsImpactedByFloat() ? "" : "not ");
|
|
}
|
|
#endif
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow && !line->IsDirty()) {
|
|
IndentBy(stdout, gNoiseIndent + 1);
|
|
printf("skipped: line=%p next=%p %s %s%s%s%s breakTypeBefore/After=%d/%d xmost=%d\n",
|
|
static_cast<void*>(line.get()),
|
|
static_cast<void*>((line.next() != end_lines() ? line.next().get() : nullptr)),
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->HasBreakAfter() ? "has-break-after " : "",
|
|
line->HasFloats() ? "has-floats " : "",
|
|
line->IsImpactedByFloat() ? "impacted " : "",
|
|
skipLastLine ? "last-line-left-aligned " : "",
|
|
line->GetBreakTypeBefore(), line->GetBreakTypeAfter(),
|
|
line->mBounds.XMost());
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
else {
|
|
// Mark everything dirty
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
/**
|
|
* Propagate reflow "damage" from from earlier lines to the current
|
|
* line. The reflow damage comes from the following sources:
|
|
* 1. The regions of float damage remembered during reflow.
|
|
* 2. The combination of nonzero |aDeltaY| and any impact by a float,
|
|
* either the previous reflow or now.
|
|
*
|
|
* When entering this function, |aLine| is still at its old position and
|
|
* |aDeltaY| indicates how much it will later be slid (assuming it
|
|
* doesn't get marked dirty and reflowed entirely).
|
|
*/
|
|
void
|
|
nsBlockFrame::PropagateFloatDamage(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaY)
|
|
{
|
|
nsFloatManager *floatManager = aState.mReflowState.mFloatManager;
|
|
NS_ASSERTION((aState.mReflowState.parentReflowState &&
|
|
aState.mReflowState.parentReflowState->mFloatManager == floatManager) ||
|
|
aState.mReflowState.mBlockDelta == 0, "Bad block delta passed in");
|
|
|
|
// Check to see if there are any floats; if there aren't, there can't
|
|
// be any float damage
|
|
if (!floatManager->HasAnyFloats())
|
|
return;
|
|
|
|
// Check the damage region recorded in the float damage.
|
|
if (floatManager->HasFloatDamage()) {
|
|
// Need to check mBounds *and* mCombinedArea to find intersections
|
|
// with aLine's floats
|
|
nscoord lineYA = aLine->mBounds.y + aDeltaY;
|
|
nscoord lineYB = lineYA + aLine->mBounds.height;
|
|
// Scrollable overflow should be sufficient for things that affect
|
|
// layout.
|
|
nsRect overflow = aLine->GetOverflowArea(eScrollableOverflow);
|
|
nscoord lineYCombinedA = overflow.y + aDeltaY;
|
|
nscoord lineYCombinedB = lineYCombinedA + overflow.height;
|
|
if (floatManager->IntersectsDamage(lineYA, lineYB) ||
|
|
floatManager->IntersectsDamage(lineYCombinedA, lineYCombinedB)) {
|
|
aLine->MarkDirty();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Check if the line is moving relative to the float manager
|
|
if (aDeltaY + aState.mReflowState.mBlockDelta != 0) {
|
|
if (aLine->IsBlock()) {
|
|
// Unconditionally reflow sliding blocks; we only really need to reflow
|
|
// if there's a float impacting this block, but the current float manager
|
|
// makes it difficult to check that. Therefore, we let the child block
|
|
// decide what it needs to reflow.
|
|
aLine->MarkDirty();
|
|
} else {
|
|
bool wasImpactedByFloat = aLine->IsImpactedByFloat();
|
|
nsFlowAreaRect floatAvailableSpace =
|
|
aState.GetFloatAvailableSpaceForHeight(aLine->mBounds.y + aDeltaY,
|
|
aLine->mBounds.height,
|
|
nullptr);
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::PropagateFloatDamage %p was = %d, is=%d\n",
|
|
this, wasImpactedByFloat, floatAvailableSpace.mHasFloats);
|
|
#endif
|
|
|
|
// Mark the line dirty if it was or is affected by a float
|
|
// We actually only really need to reflow if the amount of impact
|
|
// changes, but that's not straightforward to check
|
|
if (wasImpactedByFloat || floatAvailableSpace.mHasFloats) {
|
|
aLine->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void PlaceFrameView(nsIFrame* aFrame);
|
|
|
|
static bool LineHasClear(nsLineBox* aLine) {
|
|
return aLine->IsBlock()
|
|
? (aLine->GetBreakTypeBefore() ||
|
|
(aLine->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN) ||
|
|
!nsBlockFrame::BlockCanIntersectFloats(aLine->mFirstChild))
|
|
: aLine->HasFloatBreakAfter();
|
|
}
|
|
|
|
|
|
/**
|
|
* Reparent a whole list of floats from aOldParent to this block. The
|
|
* floats might be taken from aOldParent's overflow list. They will be
|
|
* removed from the list. They end up appended to our mFloats list.
|
|
*/
|
|
void
|
|
nsBlockFrame::ReparentFloats(nsIFrame* aFirstFrame,
|
|
nsBlockFrame* aOldParent, bool aFromOverflow,
|
|
bool aReparentSiblings) {
|
|
nsFrameList list;
|
|
aOldParent->CollectFloats(aFirstFrame, list, aFromOverflow, aReparentSiblings);
|
|
if (list.NotEmpty()) {
|
|
for (nsIFrame* f = list.FirstChild(); f; f = f->GetNextSibling()) {
|
|
ReparentFrame(f, aOldParent, this);
|
|
}
|
|
mFloats.AppendFrames(nullptr, list);
|
|
}
|
|
}
|
|
|
|
static void DumpLine(const nsBlockReflowState& aState, nsLineBox* aLine,
|
|
nscoord aDeltaY, int32_t aDeltaIndent) {
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyReflow) {
|
|
nsRect ovis(aLine->GetVisualOverflowArea());
|
|
nsRect oscr(aLine->GetScrollableOverflowArea());
|
|
nsBlockFrame::IndentBy(stdout, nsBlockFrame::gNoiseIndent + aDeltaIndent);
|
|
printf("line=%p mY=%d dirty=%s oldBounds={%d,%d,%d,%d} oldoverflow-vis={%d,%d,%d,%d} oldoverflow-scr={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d childCount=%d\n",
|
|
static_cast<void*>(aLine), aState.mY,
|
|
aLine->IsDirty() ? "yes" : "no",
|
|
aLine->mBounds.x, aLine->mBounds.y,
|
|
aLine->mBounds.width, aLine->mBounds.height,
|
|
ovis.x, ovis.y, ovis.width, ovis.height,
|
|
oscr.x, oscr.y, oscr.width, oscr.height,
|
|
aDeltaY, aState.mPrevBottomMargin.get(), aLine->GetChildCount());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Reflow the dirty lines
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
bool keepGoing = true;
|
|
bool repositionViews = false; // should we really need this?
|
|
bool foundAnyClears = aState.mFloatBreakType != NS_STYLE_CLEAR_NONE;
|
|
bool willReflowAgain = false;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": reflowing dirty lines");
|
|
printf(" computedWidth=%d\n", aState.mReflowState.ComputedWidth());
|
|
}
|
|
AutoNoisyIndenter indent(gNoisyReflow);
|
|
#endif
|
|
|
|
bool selfDirty = (GetStateBits() & NS_FRAME_IS_DIRTY) ||
|
|
(aState.mReflowState.mFlags.mVResize &&
|
|
(GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT));
|
|
|
|
// Reflow our last line if our availableHeight has increased
|
|
// so that we (and our last child) pull up content as necessary
|
|
if (aState.mReflowState.availableHeight != NS_UNCONSTRAINEDSIZE
|
|
&& GetNextInFlow() && aState.mReflowState.availableHeight > mRect.height) {
|
|
line_iterator lastLine = end_lines();
|
|
if (lastLine != begin_lines()) {
|
|
--lastLine;
|
|
lastLine->MarkDirty();
|
|
}
|
|
}
|
|
// the amount by which we will slide the current line if it is not
|
|
// dirty
|
|
nscoord deltaY = 0;
|
|
|
|
// whether we did NOT reflow the previous line and thus we need to
|
|
// recompute the carried out margin before the line if we want to
|
|
// reflow it or if its previous margin is dirty
|
|
bool needToRecoverState = false;
|
|
// Float continuations were reflowed in ReflowPushedFloats
|
|
bool reflowedFloat = mFloats.NotEmpty() &&
|
|
(mFloats.FirstChild()->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT);
|
|
bool lastLineMovedUp = false;
|
|
// We save up information about BR-clearance here
|
|
uint8_t inlineFloatBreakType = aState.mFloatBreakType;
|
|
|
|
line_iterator line = begin_lines(), line_end = end_lines();
|
|
|
|
// Reflow the lines that are already ours
|
|
for ( ; line != line_end; ++line, aState.AdvanceToNextLine()) {
|
|
DumpLine(aState, line, deltaY, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
if (selfDirty)
|
|
line->MarkDirty();
|
|
|
|
// This really sucks, but we have to look inside any blocks that have clear
|
|
// elements inside them.
|
|
// XXX what can we do smarter here?
|
|
if (!line->IsDirty() && line->IsBlock() &&
|
|
(line->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
nsIFrame *replacedBlock = nullptr;
|
|
if (line->IsBlock() &&
|
|
!nsBlockFrame::BlockCanIntersectFloats(line->mFirstChild)) {
|
|
replacedBlock = line->mFirstChild;
|
|
}
|
|
|
|
// We have to reflow the line if it's a block whose clearance
|
|
// might have changed, so detect that.
|
|
if (!line->IsDirty() &&
|
|
(line->GetBreakTypeBefore() != NS_STYLE_CLEAR_NONE ||
|
|
replacedBlock)) {
|
|
nscoord curY = aState.mY;
|
|
// See where we would be after applying any clearance due to
|
|
// BRs.
|
|
if (inlineFloatBreakType != NS_STYLE_CLEAR_NONE) {
|
|
curY = aState.ClearFloats(curY, inlineFloatBreakType);
|
|
}
|
|
|
|
nscoord newY =
|
|
aState.ClearFloats(curY, line->GetBreakTypeBefore(), replacedBlock);
|
|
|
|
if (line->HasClearance()) {
|
|
// Reflow the line if it might not have clearance anymore.
|
|
if (newY == curY
|
|
// aState.mY is the clearance point which should be the
|
|
// top border-edge of the block frame. If sliding the
|
|
// block by deltaY isn't going to put it in the predicted
|
|
// position, then we'd better reflow the line.
|
|
|| newY != line->mBounds.y + deltaY) {
|
|
line->MarkDirty();
|
|
}
|
|
} else {
|
|
// Reflow the line if the line might have clearance now.
|
|
if (curY != newY) {
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
// We might have to reflow a line that is after a clearing BR.
|
|
if (inlineFloatBreakType != NS_STYLE_CLEAR_NONE) {
|
|
aState.mY = aState.ClearFloats(aState.mY, inlineFloatBreakType);
|
|
if (aState.mY != line->mBounds.y + deltaY) {
|
|
// SlideLine is not going to put the line where the clearance
|
|
// put it. Reflow the line to be sure.
|
|
line->MarkDirty();
|
|
}
|
|
inlineFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
|
|
bool previousMarginWasDirty = line->IsPreviousMarginDirty();
|
|
if (previousMarginWasDirty) {
|
|
// If the previous margin is dirty, reflow the current line
|
|
line->MarkDirty();
|
|
line->ClearPreviousMarginDirty();
|
|
} else if (line->mBounds.YMost() + deltaY > aState.mBottomEdge) {
|
|
// Lines that aren't dirty but get slid past our height constraint must
|
|
// be reflowed.
|
|
line->MarkDirty();
|
|
}
|
|
|
|
// If we have a constrained height (i.e., breaking columns/pages),
|
|
// and the distance to the bottom might have changed, then we need
|
|
// to reflow any line that might have floats in it, both because the
|
|
// breakpoints within those floats may have changed and because we
|
|
// might have to push/pull the floats in their entirety.
|
|
// FIXME: What about a deltaY or height change that forces us to
|
|
// push lines? Why does that work?
|
|
if (!line->IsDirty() &&
|
|
aState.mReflowState.availableHeight != NS_UNCONSTRAINEDSIZE &&
|
|
(deltaY != 0 || aState.mReflowState.mFlags.mVResize) &&
|
|
(line->IsBlock() || line->HasFloats() || line->HadFloatPushed())) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
if (!line->IsDirty()) {
|
|
// See if there's any reflow damage that requires that we mark the
|
|
// line dirty.
|
|
PropagateFloatDamage(aState, line, deltaY);
|
|
}
|
|
|
|
if (needToRecoverState && line->IsDirty()) {
|
|
// We need to reconstruct the bottom margin only if we didn't
|
|
// reflow the previous line and we do need to reflow (or repair
|
|
// the top position of) the next line.
|
|
aState.ReconstructMarginAbove(line);
|
|
}
|
|
|
|
bool reflowedPrevLine = !needToRecoverState;
|
|
if (needToRecoverState) {
|
|
needToRecoverState = false;
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// this line.
|
|
if (line->IsDirty())
|
|
NS_ASSERTION(line->mFirstChild->GetPrevSibling() ==
|
|
line.prev()->LastChild(), "unexpected line frames");
|
|
aState.mPrevChild = line->mFirstChild->GetPrevSibling();
|
|
}
|
|
|
|
// Now repair the line and update |aState.mY| by calling
|
|
// |ReflowLine| or |SlideLine|.
|
|
// If we're going to reflow everything again, then no need to reflow
|
|
// the dirty line ... unless the line has floats, in which case we'd
|
|
// better reflow it now to refresh its float cache, which may contain
|
|
// dangling frame pointers! Ugh! This reflow of the line may be
|
|
// incorrect because we skipped reflowing previous lines (e.g., floats
|
|
// may be placed incorrectly), but that's OK because we'll mark the
|
|
// line dirty below under "if (aState.mReflowState.mDiscoveredClearance..."
|
|
if (line->IsDirty() && (line->HasFloats() || !willReflowAgain)) {
|
|
lastLineMovedUp = true;
|
|
|
|
bool maybeReflowingForFirstTime =
|
|
line->mBounds.x == 0 && line->mBounds.y == 0 &&
|
|
line->mBounds.width == 0 && line->mBounds.height == 0;
|
|
|
|
// Compute the dirty lines "before" YMost, after factoring in
|
|
// the running deltaY value - the running value is implicit in
|
|
// aState.mY.
|
|
nscoord oldY = line->mBounds.y;
|
|
nscoord oldYMost = line->mBounds.YMost();
|
|
|
|
NS_ASSERTION(!willReflowAgain || !line->IsBlock(),
|
|
"Don't reflow blocks while willReflowAgain is true, reflow of block abs-pos children depends on this");
|
|
|
|
// Reflow the dirty line. If it's an incremental reflow, then force
|
|
// it to invalidate the dirty area if necessary
|
|
rv = ReflowLine(aState, line, &keepGoing);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (aState.mReflowState.WillReflowAgainForClearance()) {
|
|
line->MarkDirty();
|
|
willReflowAgain = true;
|
|
// Note that once we've entered this state, every line that gets here
|
|
// (e.g. because it has floats) gets marked dirty and reflowed again.
|
|
// in the next pass. This is important, see above.
|
|
}
|
|
|
|
if (line->HasFloats()) {
|
|
reflowedFloat = true;
|
|
}
|
|
|
|
if (!keepGoing) {
|
|
DumpLine(aState, line, deltaY, -1);
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Test to see whether the margin that should be carried out
|
|
// to the next line (NL) might have changed. In ReflowBlockFrame
|
|
// we call nextLine->MarkPreviousMarginDirty if the block's
|
|
// actual carried-out bottom margin changed. So here we only
|
|
// need to worry about the following effects:
|
|
// 1) the line was just created, and it might now be blocking
|
|
// a carried-out bottom margin from previous lines that
|
|
// used to reach NL from reaching NL
|
|
// 2) the line used to be empty, and is now not empty,
|
|
// thus blocking a carried-out bottom margin from previous lines
|
|
// that used to reach NL from reaching NL
|
|
// 3) the line wasn't empty, but now is, so a carried-out
|
|
// bottom margin from previous lines that didn't used to reach NL
|
|
// now does
|
|
// 4) the line might have changed in a way that affects NL's
|
|
// ShouldApplyTopMargin decision. The three things that matter
|
|
// are the line's emptiness, its adjacency to the top of the block,
|
|
// and whether it has clearance (the latter only matters if the block
|
|
// was and is adjacent to the top and empty).
|
|
//
|
|
// If the line is empty now, we can't reliably tell if the line was empty
|
|
// before, so we just assume it was and do nextLine->MarkPreviousMarginDirty.
|
|
// This means the checks in 4) are redundant; if the line is empty now
|
|
// we don't need to check 4), but if the line is not empty now and we're sure
|
|
// it wasn't empty before, any adjacency and clearance changes are irrelevant
|
|
// to the result of nextLine->ShouldApplyTopMargin.
|
|
if (line.next() != end_lines()) {
|
|
bool maybeWasEmpty = oldY == line.next()->mBounds.y;
|
|
bool isEmpty = line->CachedIsEmpty();
|
|
if (maybeReflowingForFirstTime /*1*/ ||
|
|
(isEmpty || maybeWasEmpty) /*2/3/4*/) {
|
|
line.next()->MarkPreviousMarginDirty();
|
|
// since it's marked dirty, nobody will care about |deltaY|
|
|
}
|
|
}
|
|
|
|
// If the line was just reflowed for the first time, then its
|
|
// old mBounds cannot be trusted so this deltaY computation is
|
|
// bogus. But that's OK because we just did
|
|
// MarkPreviousMarginDirty on the next line which will force it
|
|
// to be reflowed, so this computation of deltaY will not be
|
|
// used.
|
|
deltaY = line->mBounds.YMost() - oldYMost;
|
|
|
|
// Now do an interrupt check. We want to do this only in the case when we
|
|
// actually reflow the line, so that if we get back in here we'll get
|
|
// further on the reflow before interrupting.
|
|
aState.mPresContext->CheckForInterrupt(this);
|
|
} else {
|
|
aState.mOverflowTracker->Skip(line->mFirstChild, aState.mReflowStatus);
|
|
// Nop except for blocks (we don't create overflow container
|
|
// continuations for any inlines atm), so only checking mFirstChild
|
|
// is enough
|
|
|
|
lastLineMovedUp = deltaY < 0;
|
|
|
|
if (deltaY != 0)
|
|
SlideLine(aState, line, deltaY);
|
|
else
|
|
repositionViews = true;
|
|
|
|
NS_ASSERTION(!line->IsDirty() || !line->HasFloats(),
|
|
"Possibly stale float cache here!");
|
|
if (willReflowAgain && line->IsBlock()) {
|
|
// If we're going to reflow everything again, and this line is a block,
|
|
// then there is no need to recover float state. The line may contain
|
|
// other lines with floats, but in that case RecoverStateFrom would only
|
|
// add floats to the float manager. We don't need to do that because
|
|
// everything's going to get reflowed again "for real". Calling
|
|
// RecoverStateFrom in this situation could be lethal because the
|
|
// block's descendant lines may have float caches containing dangling
|
|
// frame pointers. Ugh!
|
|
// If this line is inline, then we need to recover its state now
|
|
// to make sure that we don't forget to move its floats by deltaY.
|
|
} else {
|
|
// XXX EVIL O(N^2) EVIL
|
|
aState.RecoverStateFrom(line, deltaY);
|
|
}
|
|
|
|
// Keep mY up to date in case we're propagating reflow damage
|
|
// and also because our final height may depend on it. If the
|
|
// line is inlines, then only update mY if the line is not
|
|
// empty, because that's what PlaceLine does. (Empty blocks may
|
|
// want to update mY, e.g. if they have clearance.)
|
|
if (line->IsBlock() || !line->CachedIsEmpty()) {
|
|
aState.mY = line->mBounds.YMost();
|
|
}
|
|
|
|
needToRecoverState = true;
|
|
|
|
if (reflowedPrevLine && !line->IsBlock() &&
|
|
aState.mPresContext->HasPendingInterrupt()) {
|
|
// Need to make sure to pull overflows from any prev-in-flows
|
|
for (nsIFrame* inlineKid = line->mFirstChild; inlineKid;
|
|
inlineKid = inlineKid->GetFirstPrincipalChild()) {
|
|
inlineKid->PullOverflowsFromPrevInFlow();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Record if we need to clear floats before reflowing the next
|
|
// line. Note that inlineFloatBreakType will be handled and
|
|
// cleared before the next line is processed, so there is no
|
|
// need to combine break types here.
|
|
if (line->HasFloatBreakAfter()) {
|
|
inlineFloatBreakType = line->GetBreakTypeAfter();
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = true;
|
|
}
|
|
|
|
DumpLine(aState, line, deltaY, -1);
|
|
|
|
if (aState.mPresContext->HasPendingInterrupt()) {
|
|
willReflowAgain = true;
|
|
// Another option here might be to leave |line| clean if
|
|
// !HasPendingInterrupt() before the CheckForInterrupt() call, since in
|
|
// that case the line really did reflow as it should have. Not sure
|
|
// whether that would be safe, so doing this for now instead. Also not
|
|
// sure whether we really want to mark all lines dirty after an
|
|
// interrupt, but until we get better at propagating float damage we
|
|
// really do need to do it this way; see comments inside MarkLineDirty.
|
|
MarkLineDirtyForInterrupt(line);
|
|
}
|
|
}
|
|
|
|
// Handle BR-clearance from the last line of the block
|
|
if (inlineFloatBreakType != NS_STYLE_CLEAR_NONE) {
|
|
aState.mY = aState.ClearFloats(aState.mY, inlineFloatBreakType);
|
|
}
|
|
|
|
if (needToRecoverState) {
|
|
// Is this expensive?
|
|
aState.ReconstructMarginAbove(line);
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// the last line.
|
|
NS_ASSERTION(line == line_end || line->mFirstChild->GetPrevSibling() ==
|
|
line.prev()->LastChild(), "unexpected line frames");
|
|
aState.mPrevChild =
|
|
line == line_end ? mFrames.LastChild() : line->mFirstChild->GetPrevSibling();
|
|
}
|
|
|
|
// Should we really have to do this?
|
|
if (repositionViews)
|
|
::PlaceFrameView(this);
|
|
|
|
// We can skip trying to pull up the next line if our height is constrained
|
|
// (so we can report being incomplete) and there is no next in flow or we
|
|
// were told not to or we know it will be futile, i.e.,
|
|
// -- the next in flow is not changing
|
|
// -- and we cannot have added more space for its first line to be
|
|
// pulled up into,
|
|
// -- it's an incremental reflow of a descendant
|
|
// -- and we didn't reflow any floats (so the available space
|
|
// didn't change)
|
|
// -- my chain of next-in-flows either has no first line, or its first
|
|
// line isn't dirty.
|
|
bool heightConstrained =
|
|
aState.mReflowState.availableHeight != NS_UNCONSTRAINEDSIZE;
|
|
bool skipPull = willReflowAgain && heightConstrained;
|
|
if (!skipPull && heightConstrained && aState.mNextInFlow &&
|
|
(aState.mReflowState.mFlags.mNextInFlowUntouched &&
|
|
!lastLineMovedUp &&
|
|
!(GetStateBits() & NS_FRAME_IS_DIRTY) &&
|
|
!reflowedFloat)) {
|
|
// We'll place lineIter at the last line of this block, so that
|
|
// nsBlockInFlowLineIterator::Next() will take us to the first
|
|
// line of my next-in-flow-chain. (But first, check that I
|
|
// have any lines -- if I don't, just bail out of this
|
|
// optimization.)
|
|
line_iterator lineIter = this->end_lines();
|
|
if (lineIter != this->begin_lines()) {
|
|
lineIter--; // I have lines; step back from dummy iterator to last line.
|
|
nsBlockInFlowLineIterator bifLineIter(this, lineIter);
|
|
|
|
// Check for next-in-flow-chain's first line.
|
|
// (First, see if there is such a line, and second, see if it's clean)
|
|
if (!bifLineIter.Next() ||
|
|
!bifLineIter.GetLine()->IsDirty()) {
|
|
skipPull=true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (skipPull && aState.mNextInFlow) {
|
|
NS_ASSERTION(heightConstrained, "Height should be constrained here\n");
|
|
if (IS_TRUE_OVERFLOW_CONTAINER(aState.mNextInFlow))
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
else
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
if (!skipPull && aState.mNextInFlow) {
|
|
// Pull data from a next-in-flow if there's still room for more
|
|
// content here.
|
|
while (keepGoing && aState.mNextInFlow) {
|
|
// Grab first line from our next-in-flow
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
nsLineBox* pulledLine;
|
|
nsFrameList pulledFrames;
|
|
bool isOverflowLine = false;
|
|
if (!nextInFlow->mLines.empty()) {
|
|
RemoveFirstLine(nextInFlow->mLines, nextInFlow->mFrames,
|
|
&pulledLine, &pulledFrames);
|
|
} else {
|
|
// Grab an overflow line if there are any
|
|
FrameLines* overflowLines = nextInFlow->GetOverflowLines();
|
|
if (!overflowLines) {
|
|
aState.mNextInFlow =
|
|
static_cast<nsBlockFrame*>(nextInFlow->GetNextInFlow());
|
|
continue;
|
|
}
|
|
bool last =
|
|
RemoveFirstLine(overflowLines->mLines, overflowLines->mFrames,
|
|
&pulledLine, &pulledFrames);
|
|
if (last) {
|
|
nextInFlow->DestroyOverflowLines();
|
|
}
|
|
isOverflowLine = true;
|
|
}
|
|
|
|
if (pulledFrames.IsEmpty()) {
|
|
// The line is empty. Try the next one.
|
|
NS_ASSERTION(pulledLine->GetChildCount() == 0 &&
|
|
!pulledLine->mFirstChild, "bad empty line");
|
|
nextInFlow->FreeLineBox(pulledLine);
|
|
continue;
|
|
}
|
|
|
|
if (pulledLine == nextInFlow->GetLineCursor()) {
|
|
nextInFlow->ClearLineCursor();
|
|
}
|
|
ReparentFrames(pulledFrames, nextInFlow, this);
|
|
|
|
NS_ASSERTION(pulledFrames.LastChild() == pulledLine->LastChild(),
|
|
"Unexpected last frame");
|
|
NS_ASSERTION(aState.mPrevChild || mLines.empty(), "should have a prevchild here");
|
|
NS_ASSERTION(aState.mPrevChild == mFrames.LastChild(),
|
|
"Incorrect aState.mPrevChild before inserting line at end");
|
|
|
|
// Shift pulledLine's frames into our mFrames list.
|
|
mFrames.AppendFrames(nullptr, pulledFrames);
|
|
|
|
// Add line to our line list, and set its last child as our new prev-child
|
|
line = mLines.before_insert(end_lines(), pulledLine);
|
|
aState.mPrevChild = mFrames.LastChild();
|
|
|
|
// Reparent floats whose placeholders are in the line.
|
|
ReparentFloats(pulledLine->mFirstChild, nextInFlow, isOverflowLine, true);
|
|
|
|
DumpLine(aState, pulledLine, deltaY, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
if (aState.mPresContext->HasPendingInterrupt()) {
|
|
MarkLineDirtyForInterrupt(line);
|
|
} else {
|
|
// Now reflow it and any lines that it makes during it's reflow
|
|
// (we have to loop here because reflowing the line may cause a new
|
|
// line to be created; see SplitLine's callers for examples of
|
|
// when this happens).
|
|
while (line != end_lines()) {
|
|
rv = ReflowLine(aState, line, &keepGoing);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (aState.mReflowState.WillReflowAgainForClearance()) {
|
|
line->MarkDirty();
|
|
keepGoing = false;
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
break;
|
|
}
|
|
|
|
DumpLine(aState, line, deltaY, -1);
|
|
if (!keepGoing) {
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = true;
|
|
}
|
|
|
|
if (aState.mPresContext->CheckForInterrupt(this)) {
|
|
MarkLineDirtyForInterrupt(line);
|
|
break;
|
|
}
|
|
|
|
// If this is an inline frame then its time to stop
|
|
++line;
|
|
aState.AdvanceToNextLine();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
} //XXXfr shouldn't set this flag when nextinflow has no lines
|
|
}
|
|
|
|
// Handle an odd-ball case: a list-item with no lines
|
|
if (HasOutsideBullet() && mLines.empty()) {
|
|
nsHTMLReflowMetrics metrics;
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
ReflowBullet(bullet, aState, metrics,
|
|
aState.mReflowState.mComputedBorderPadding.top);
|
|
NS_ASSERTION(!BulletIsEmpty() || metrics.height == 0,
|
|
"empty bullet took up space");
|
|
|
|
if (!BulletIsEmpty()) {
|
|
// There are no lines so we have to fake up some y motion so that
|
|
// we end up with *some* height.
|
|
|
|
if (metrics.ascent == nsHTMLReflowMetrics::ASK_FOR_BASELINE &&
|
|
!nsLayoutUtils::GetFirstLineBaseline(bullet, &metrics.ascent)) {
|
|
metrics.ascent = metrics.height;
|
|
}
|
|
|
|
nsRefPtr<nsFontMetrics> fm;
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
|
|
nsLayoutUtils::FontSizeInflationFor(this));
|
|
aState.mReflowState.rendContext->SetFont(fm); // FIXME: needed?
|
|
|
|
nscoord minAscent =
|
|
nsLayoutUtils::GetCenteredFontBaseline(fm, aState.mMinLineHeight);
|
|
nscoord minDescent = aState.mMinLineHeight - minAscent;
|
|
|
|
aState.mY += NS_MAX(minAscent, metrics.ascent) +
|
|
NS_MAX(minDescent, metrics.height - metrics.ascent);
|
|
|
|
nscoord offset = minAscent - metrics.ascent;
|
|
if (offset > 0) {
|
|
bullet->SetRect(bullet->GetRect() + nsPoint(0, offset));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (foundAnyClears) {
|
|
AddStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
} else {
|
|
RemoveStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent - 1);
|
|
ListTag(stdout);
|
|
printf(": done reflowing dirty lines (status=%x)\n",
|
|
aState.mReflowStatus);
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void MarkAllDescendantLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsLineList::iterator line = aBlock->begin_lines();
|
|
nsLineList::iterator endLine = aBlock->end_lines();
|
|
while (line != endLine) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame* f = line->mFirstChild;
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(f);
|
|
if (bf) {
|
|
MarkAllDescendantLinesDirty(bf);
|
|
}
|
|
}
|
|
line->MarkDirty();
|
|
++line;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MarkLineDirtyForInterrupt(nsLineBox* aLine)
|
|
{
|
|
aLine->MarkDirty();
|
|
|
|
// Just checking NS_FRAME_IS_DIRTY is ok, because we've already
|
|
// marked the lines that need to be marked dirty based on our
|
|
// vertical resize stuff. So we'll definitely reflow all those kids;
|
|
// the only question is how they should behave.
|
|
if (GetStateBits() & NS_FRAME_IS_DIRTY) {
|
|
// Mark all our child frames dirty so we make sure to reflow them
|
|
// later.
|
|
int32_t n = aLine->GetChildCount();
|
|
for (nsIFrame* f = aLine->mFirstChild; n > 0;
|
|
f = f->GetNextSibling(), --n) {
|
|
f->AddStateBits(NS_FRAME_IS_DIRTY);
|
|
}
|
|
// And mark all the floats whose reflows we might be skipping dirty too.
|
|
if (aLine->HasFloats()) {
|
|
for (nsFloatCache* fc = aLine->GetFirstFloat(); fc; fc = fc->Next()) {
|
|
fc->mFloat->AddStateBits(NS_FRAME_IS_DIRTY);
|
|
}
|
|
}
|
|
} else {
|
|
// Dirty all the descendant lines of block kids to handle float damage,
|
|
// since our nsFloatManager will go away by the next time we're reflowing.
|
|
// XXXbz Can we do something more like what PropagateFloatDamage does?
|
|
// Would need to sort out the exact business with mBlockDelta for that....
|
|
// This marks way too much dirty. If we ever make this better, revisit
|
|
// which lines we mark dirty in the interrupt case in ReflowDirtyLines.
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(aLine->mFirstChild);
|
|
if (bf) {
|
|
MarkAllDescendantLinesDirty(bf);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLine,
|
|
nsLineList::iterator aLineEnd)
|
|
{
|
|
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
|
|
if (0 == aLine->GetChildCount()) {
|
|
NS_ASSERTION(aState.mCurrentLine == aLine,
|
|
"using function more generally than designed, "
|
|
"but perhaps OK now");
|
|
nsLineBox* line = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
FreeLineBox(line);
|
|
// Mark the previous margin of the next line dirty since we need to
|
|
// recompute its top position.
|
|
if (aLine != aLineEnd)
|
|
aLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reflow a line. The line will either contain a single block frame
|
|
* or contain 1 or more inline frames. aKeepReflowGoing indicates
|
|
* whether or not the caller should continue to reflow more lines.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "reflowing empty line");
|
|
|
|
// Setup the line-layout for the new line
|
|
aState.mCurrentLine = aLine;
|
|
aLine->ClearDirty();
|
|
aLine->InvalidateCachedIsEmpty();
|
|
aLine->ClearHadFloatPushed();
|
|
|
|
// Now that we know what kind of line we have, reflow it
|
|
if (aLine->IsBlock()) {
|
|
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
|
|
} else {
|
|
aLine->SetLineWrapped(false);
|
|
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine)
|
|
{
|
|
// First check our remaining lines.
|
|
if (end_lines() != aLine.next()) {
|
|
return PullFrameFrom(aState, aLine, this, false, mFrames, aLine.next());
|
|
}
|
|
|
|
NS_ASSERTION(!GetOverflowLines(),
|
|
"Our overflow lines should have been removed at the start of reflow");
|
|
|
|
// Try each next-in-flow.
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
while (nextInFlow) {
|
|
// first normal lines, then overflow lines
|
|
if (!nextInFlow->mLines.empty()) {
|
|
return PullFrameFrom(aState, aLine, nextInFlow, false,
|
|
nextInFlow->mFrames,
|
|
nextInFlow->mLines.begin());
|
|
}
|
|
|
|
FrameLines* overflowLines = nextInFlow->GetOverflowLines();
|
|
if (overflowLines) {
|
|
return PullFrameFrom(aState, aLine, nextInFlow, true,
|
|
overflowLines->mFrames,
|
|
overflowLines->mLines.begin());
|
|
}
|
|
|
|
nextInFlow = static_cast<nsBlockFrame*>(nextInFlow->GetNextInFlow());
|
|
aState.mNextInFlow = nextInFlow;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::PullFrameFrom(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsBlockFrame* aFromContainer,
|
|
bool aFromOverflowLine,
|
|
nsFrameList& aFromFrameList,
|
|
nsLineList::iterator aFromLine)
|
|
{
|
|
nsLineBox* fromLine = aFromLine;
|
|
NS_ABORT_IF_FALSE(fromLine, "bad line to pull from");
|
|
NS_ABORT_IF_FALSE(fromLine->GetChildCount(), "empty line");
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "empty line");
|
|
|
|
NS_ASSERTION(fromLine->IsBlock() == fromLine->mFirstChild->IsBlockOutside(),
|
|
"Disagreement about whether it's a block or not");
|
|
|
|
if (fromLine->IsBlock()) {
|
|
// If our line is not empty and the child in aFromLine is a block
|
|
// then we cannot pull up the frame into this line. In this case
|
|
// we stop pulling.
|
|
return nullptr;
|
|
}
|
|
// Take frame from fromLine
|
|
nsIFrame* frame = fromLine->mFirstChild;
|
|
nsIFrame* newFirstChild = frame->GetNextSibling();
|
|
|
|
if (aFromContainer != this) {
|
|
NS_ASSERTION(aState.mPrevChild == aLine->LastChild(),
|
|
"mPrevChild should be the LastChild of the line we are adding to");
|
|
// The frame is being pulled from a next-in-flow; therefore we
|
|
// need to add it to our sibling list.
|
|
if (NS_LIKELY(!aFromOverflowLine)) {
|
|
NS_ASSERTION(&aFromFrameList == &aFromContainer->mFrames,
|
|
"must be normal flow if not overflow line");
|
|
NS_ASSERTION(aFromLine == aFromContainer->mLines.begin(),
|
|
"should only pull from first line");
|
|
}
|
|
aFromFrameList.RemoveFrame(frame);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
NS_ASSERTION(frame->GetParent() == aFromContainer, "unexpected parent frame");
|
|
|
|
ReparentFrame(frame, aFromContainer, this);
|
|
mFrames.InsertFrame(nullptr, aState.mPrevChild, frame);
|
|
|
|
// The frame might have (or contain) floats that need to be
|
|
// brought over too.
|
|
ReparentFloats(frame, aFromContainer, aFromOverflowLine, true);
|
|
}
|
|
// when aFromContainer is 'this', then aLine->LastChild()'s next sibling
|
|
// is already set correctly.
|
|
aLine->NoteFrameAdded(frame);
|
|
|
|
if (fromLine->GetChildCount() > 1) {
|
|
// Mark line dirty now that we pulled a child
|
|
fromLine->NoteFrameRemoved(frame);
|
|
fromLine->MarkDirty();
|
|
fromLine->mFirstChild = newFirstChild;
|
|
} else {
|
|
// Free up the fromLine now that it's empty
|
|
// Its bounds might need to be redrawn, though.
|
|
FrameLines* overflowLines =
|
|
aFromOverflowLine ? aFromContainer->RemoveOverflowLines() : nullptr;
|
|
nsLineList* fromLineList =
|
|
aFromOverflowLine ? &overflowLines->mLines : &aFromContainer->mLines;
|
|
if (aFromLine.next() != fromLineList->end())
|
|
aFromLine.next()->MarkPreviousMarginDirty();
|
|
|
|
fromLineList->erase(aFromLine);
|
|
// aFromLine is now invalid
|
|
aFromContainer->FreeLineBox(fromLine);
|
|
|
|
// Put any remaining overflow lines back.
|
|
if (aFromOverflowLine) {
|
|
if (!fromLineList->empty()) {
|
|
aFromContainer->SetOverflowLines(overflowLines);
|
|
} else {
|
|
delete overflowLines;
|
|
// Now any iterators into fromLineList are invalid (but
|
|
// aFromLine already was invalidated above)
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
return frame;
|
|
}
|
|
|
|
static void
|
|
PlaceFrameView(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->HasView())
|
|
nsContainerFrame::PositionFrameView(aFrame);
|
|
else
|
|
nsContainerFrame::PositionChildViews(aFrame);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SlideLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine, nscoord aDY)
|
|
{
|
|
NS_PRECONDITION(aDY != 0, "why slide a line nowhere?");
|
|
|
|
// Adjust line state
|
|
aLine->SlideBy(aDY);
|
|
|
|
// Adjust the frames in the line
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
if (!kid) {
|
|
return;
|
|
}
|
|
|
|
if (aLine->IsBlock()) {
|
|
if (aDY) {
|
|
nsPoint p = kid->GetPosition();
|
|
p.y += aDY;
|
|
kid->SetPosition(p);
|
|
}
|
|
|
|
// Make sure the frame's view and any child views are updated
|
|
::PlaceFrameView(kid);
|
|
}
|
|
else {
|
|
// Adjust the Y coordinate of the frames in the line.
|
|
// Note: we need to re-position views even if aDY is 0, because
|
|
// one of our parent frames may have moved and so the view's position
|
|
// relative to its parent may have changed
|
|
int32_t n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (aDY) {
|
|
nsPoint p = kid->GetPosition();
|
|
p.y += aDY;
|
|
kid->SetPosition(p);
|
|
}
|
|
// Make sure the frame's view and any child views are updated
|
|
::PlaceFrameView(kid);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType)
|
|
{
|
|
nsresult rv = nsBlockFrameSuper::AttributeChanged(aNameSpaceID,
|
|
aAttribute, aModType);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsGkAtoms::start == aAttribute ||
|
|
(nsGkAtoms::reversed == aAttribute && mContent->IsHTML(nsGkAtoms::ol))) {
|
|
nsPresContext* presContext = PresContext();
|
|
|
|
// XXX Not sure if this is necessary anymore
|
|
if (RenumberLists(presContext)) {
|
|
presContext->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eStyleChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
}
|
|
else if (nsGkAtoms::value == aAttribute) {
|
|
const nsStyleDisplay* styleDisplay = GetStyleDisplay();
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) {
|
|
// Search for the closest ancestor that's a block frame. We
|
|
// make the assumption that all related list items share a
|
|
// common block parent.
|
|
// XXXldb I think that's a bad assumption.
|
|
nsBlockFrame* blockParent = nsLayoutUtils::FindNearestBlockAncestor(this);
|
|
|
|
// Tell the enclosing block frame to renumber list items within
|
|
// itself
|
|
if (nullptr != blockParent) {
|
|
nsPresContext* presContext = PresContext();
|
|
// XXX Not sure if this is necessary anymore
|
|
if (blockParent->RenumberLists(presContext)) {
|
|
presContext->PresShell()->
|
|
FrameNeedsReflow(blockParent, nsIPresShell::eStyleChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
static inline bool
|
|
IsNonAutoNonZeroHeight(const nsStyleCoord& aCoord)
|
|
{
|
|
if (aCoord.GetUnit() == eStyleUnit_Auto)
|
|
return false;
|
|
if (aCoord.IsCoordPercentCalcUnit()) {
|
|
// If we evaluate the length/percent/calc at a percentage basis of
|
|
// both nscoord_MAX and 0, and it's zero both ways, then it's a zero
|
|
// length, percent, or combination thereof. Test > 0 so we clamp
|
|
// negative calc() results to 0.
|
|
return nsRuleNode::ComputeCoordPercentCalc(aCoord, nscoord_MAX) > 0 ||
|
|
nsRuleNode::ComputeCoordPercentCalc(aCoord, 0) > 0;
|
|
}
|
|
NS_ABORT_IF_FALSE(false, "unexpected unit for height or min-height");
|
|
return true;
|
|
}
|
|
|
|
/* virtual */ bool
|
|
nsBlockFrame::IsSelfEmpty()
|
|
{
|
|
// Blocks which are margin-roots (including inline-blocks) cannot be treated
|
|
// as empty for margin-collapsing and other purposes. They're more like
|
|
// replaced elements.
|
|
if (GetStateBits() & NS_BLOCK_MARGIN_ROOT)
|
|
return false;
|
|
|
|
const nsStylePosition* position = GetStylePosition();
|
|
|
|
if (IsNonAutoNonZeroHeight(position->mMinHeight) ||
|
|
IsNonAutoNonZeroHeight(position->mHeight))
|
|
return false;
|
|
|
|
const nsStyleBorder* border = GetStyleBorder();
|
|
const nsStylePadding* padding = GetStylePadding();
|
|
if (border->GetComputedBorderWidth(NS_SIDE_TOP) != 0 ||
|
|
border->GetComputedBorderWidth(NS_SIDE_BOTTOM) != 0 ||
|
|
!nsLayoutUtils::IsPaddingZero(padding->mPadding.GetTop()) ||
|
|
!nsLayoutUtils::IsPaddingZero(padding->mPadding.GetBottom())) {
|
|
return false;
|
|
}
|
|
|
|
if (HasOutsideBullet() && !BulletIsEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::CachedIsEmpty()
|
|
{
|
|
if (!IsSelfEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (!line->CachedIsEmpty())
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::IsEmpty()
|
|
{
|
|
if (!IsSelfEmpty()) {
|
|
return false;
|
|
}
|
|
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (!line->IsEmpty())
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::ShouldApplyTopMargin(nsBlockReflowState& aState,
|
|
nsLineBox* aLine)
|
|
{
|
|
if (aState.GetFlag(BRS_APPLYTOPMARGIN)) {
|
|
// Apply short-circuit check to avoid searching the line list
|
|
return true;
|
|
}
|
|
|
|
if (!aState.IsAdjacentWithTop()) {
|
|
// If we aren't at the top Y coordinate then something of non-zero
|
|
// height must have been placed. Therefore the childs top-margin
|
|
// applies.
|
|
aState.SetFlag(BRS_APPLYTOPMARGIN, true);
|
|
return true;
|
|
}
|
|
|
|
// Determine if this line is "essentially" the first line
|
|
line_iterator line = begin_lines();
|
|
if (aState.GetFlag(BRS_HAVELINEADJACENTTOTOP)) {
|
|
line = aState.mLineAdjacentToTop;
|
|
}
|
|
while (line != aLine) {
|
|
if (!line->CachedIsEmpty() || line->HasClearance()) {
|
|
// A line which precedes aLine is non-empty, or has clearance,
|
|
// so therefore the top margin applies.
|
|
aState.SetFlag(BRS_APPLYTOPMARGIN, true);
|
|
return true;
|
|
}
|
|
// No need to apply the top margin if the line has floats. We
|
|
// should collapse anyway (bug 44419)
|
|
++line;
|
|
aState.SetFlag(BRS_HAVELINEADJACENTTOTOP, true);
|
|
aState.mLineAdjacentToTop = line;
|
|
}
|
|
|
|
// The line being reflowed is "essentially" the first line in the
|
|
// block. Therefore its top-margin will be collapsed by the
|
|
// generational collapsing logic with its parent (us).
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
if (!frame) {
|
|
NS_ASSERTION(false, "program error - unexpected empty line");
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
// Prepare the block reflow engine
|
|
const nsStyleDisplay* display = frame->GetStyleDisplay();
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState);
|
|
|
|
uint8_t breakType = display->mBreakType;
|
|
if (NS_STYLE_CLEAR_NONE != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
|
|
// Clear past floats before the block if the clear style is not none
|
|
aLine->SetBreakTypeBefore(breakType);
|
|
|
|
// See if we should apply the top margin. If the block frame being
|
|
// reflowed is a continuation (non-null prev-in-flow) then we don't
|
|
// apply its top margin because it's not significant. Otherwise, dig
|
|
// deeper.
|
|
bool applyTopMargin =
|
|
!frame->GetPrevInFlow() && ShouldApplyTopMargin(aState, aLine);
|
|
|
|
if (applyTopMargin) {
|
|
// The HasClearance setting is only valid if ShouldApplyTopMargin
|
|
// returned false (in which case the top-margin-root set our
|
|
// clearance flag). Otherwise clear it now. We'll set it later on
|
|
// ourselves if necessary.
|
|
aLine->ClearHasClearance();
|
|
}
|
|
bool treatWithClearance = aLine->HasClearance();
|
|
|
|
bool mightClearFloats = breakType != NS_STYLE_CLEAR_NONE;
|
|
nsIFrame *replacedBlock = nullptr;
|
|
if (!nsBlockFrame::BlockCanIntersectFloats(frame)) {
|
|
mightClearFloats = true;
|
|
replacedBlock = frame;
|
|
}
|
|
|
|
// If our top margin was counted as part of some parents top-margin
|
|
// collapse and we are being speculatively reflowed assuming this
|
|
// frame DID NOT need clearance, then we need to check that
|
|
// assumption.
|
|
if (!treatWithClearance && !applyTopMargin && mightClearFloats &&
|
|
aState.mReflowState.mDiscoveredClearance) {
|
|
nscoord curY = aState.mY + aState.mPrevBottomMargin.get();
|
|
nscoord clearY = aState.ClearFloats(curY, breakType, replacedBlock);
|
|
if (clearY != curY) {
|
|
// Looks like that assumption was invalid, we do need
|
|
// clearance. Tell our ancestor so it can reflow again. It is
|
|
// responsible for actually setting our clearance flag before
|
|
// the next reflow.
|
|
treatWithClearance = true;
|
|
// Only record the first frame that requires clearance
|
|
if (!*aState.mReflowState.mDiscoveredClearance) {
|
|
*aState.mReflowState.mDiscoveredClearance = frame;
|
|
}
|
|
aState.mPrevChild = frame;
|
|
// Exactly what we do now is flexible since we'll definitely be
|
|
// reflowed.
|
|
return NS_OK;
|
|
}
|
|
}
|
|
if (treatWithClearance) {
|
|
applyTopMargin = true;
|
|
}
|
|
|
|
nsIFrame* clearanceFrame = nullptr;
|
|
nscoord startingY = aState.mY;
|
|
nsCollapsingMargin incomingMargin = aState.mPrevBottomMargin;
|
|
nscoord clearance;
|
|
// Save the original position of the frame so that we can reposition
|
|
// its view as needed.
|
|
nsPoint originalPosition = frame->GetPosition();
|
|
while (true) {
|
|
clearance = 0;
|
|
nscoord topMargin = 0;
|
|
bool mayNeedRetry = false;
|
|
bool clearedFloats = false;
|
|
if (applyTopMargin) {
|
|
// Precompute the blocks top margin value so that we can get the
|
|
// correct available space (there might be a float that's
|
|
// already been placed below the aState.mPrevBottomMargin
|
|
|
|
// Setup a reflowState to get the style computed margin-top
|
|
// value. We'll use a reason of `resize' so that we don't fudge
|
|
// any incremental reflow state.
|
|
|
|
// The availSpace here is irrelevant to our needs - all we want
|
|
// out if this setup is the margin-top value which doesn't depend
|
|
// on the childs available space.
|
|
// XXX building a complete nsHTMLReflowState just to get the margin-top
|
|
// seems like a waste. And we do this for almost every block!
|
|
nsSize availSpace(aState.mContentArea.width, NS_UNCONSTRAINEDSIZE);
|
|
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
|
|
frame, availSpace);
|
|
|
|
if (treatWithClearance) {
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
|
|
// Now compute the collapsed margin-top value into aState.mPrevBottomMargin, assuming
|
|
// that all child margins collapse down to clearanceFrame.
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(reflowState,
|
|
&aState.mPrevBottomMargin, clearanceFrame, &mayNeedRetry);
|
|
|
|
// XXX optimization; we could check the collapsing children to see if they are sure
|
|
// to require clearance, and so avoid retrying them
|
|
|
|
if (clearanceFrame) {
|
|
// Don't allow retries on the second pass. The clearance decisions for the
|
|
// blocks whose top-margins collapse with ours are now fixed.
|
|
mayNeedRetry = false;
|
|
}
|
|
|
|
if (!treatWithClearance && !clearanceFrame && mightClearFloats) {
|
|
// We don't know if we need clearance and this is the first,
|
|
// optimistic pass. So determine whether *this block* needs
|
|
// clearance. Note that we do not allow the decision for whether
|
|
// this block has clearance to change on the second pass; that
|
|
// decision is only allowed to be made under the optimistic
|
|
// first pass.
|
|
nscoord curY = aState.mY + aState.mPrevBottomMargin.get();
|
|
nscoord clearY = aState.ClearFloats(curY, breakType, replacedBlock);
|
|
if (clearY != curY) {
|
|
// Looks like we need clearance and we didn't know about it already. So
|
|
// recompute collapsed margin
|
|
treatWithClearance = true;
|
|
// Remember this decision, needed for incremental reflow
|
|
aLine->SetHasClearance();
|
|
|
|
// Apply incoming margins
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
|
|
// Compute the collapsed margin again, ignoring the incoming margin this time
|
|
mayNeedRetry = false;
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(reflowState,
|
|
&aState.mPrevBottomMargin, clearanceFrame, &mayNeedRetry);
|
|
}
|
|
}
|
|
|
|
// Temporarily advance the running Y value so that the
|
|
// GetAvailableSpace method will return the right available
|
|
// space. This undone as soon as the horizontal margins are
|
|
// computed.
|
|
topMargin = aState.mPrevBottomMargin.get();
|
|
|
|
if (treatWithClearance) {
|
|
nscoord currentY = aState.mY;
|
|
// advance mY to the clear position.
|
|
aState.mY = aState.ClearFloats(aState.mY, breakType, replacedBlock);
|
|
|
|
clearedFloats = aState.mY != currentY;
|
|
|
|
// Compute clearance. It's the amount we need to add to the top
|
|
// border-edge of the frame, after applying collapsed margins
|
|
// from the frame and its children, to get it to line up with
|
|
// the bottom of the floats. The former is currentY + topMargin,
|
|
// the latter is the current aState.mY.
|
|
// Note that negative clearance is possible
|
|
clearance = aState.mY - (currentY + topMargin);
|
|
|
|
// Add clearance to our top margin while we compute available
|
|
// space for the frame
|
|
topMargin += clearance;
|
|
|
|
// Note that aState.mY should stay where it is: at the top
|
|
// border-edge of the frame
|
|
} else {
|
|
// Advance aState.mY to the top border-edge of the frame.
|
|
aState.mY += topMargin;
|
|
}
|
|
}
|
|
|
|
// Here aState.mY is the top border-edge of the block.
|
|
// Compute the available space for the block
|
|
nsFlowAreaRect floatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("setting line %p isImpacted to %s\n",
|
|
aLine.get(), floatAvailableSpace.mHasFloats?"true":"false");
|
|
#endif
|
|
aLine->SetLineIsImpactedByFloat(floatAvailableSpace.mHasFloats);
|
|
nsRect availSpace;
|
|
aState.ComputeBlockAvailSpace(frame, display, floatAvailableSpace,
|
|
replacedBlock != nullptr, availSpace);
|
|
|
|
// The check for
|
|
// (!aState.mReflowState.mFlags.mIsTopOfPage || clearedFloats)
|
|
// is to some degree out of paranoia: if we reliably eat up top
|
|
// margins at the top of the page as we ought to, it wouldn't be
|
|
// needed.
|
|
if ((!aState.mReflowState.mFlags.mIsTopOfPage || clearedFloats) &&
|
|
availSpace.height < 0) {
|
|
// We know already that this child block won't fit on this
|
|
// page/column due to the top margin or the clearance. So we need
|
|
// to get out of here now. (If we don't, most blocks will handle
|
|
// things fine, and report break-before, but zero-height blocks
|
|
// won't, and will thus make their parent overly-large and force
|
|
// *it* to be pushed in its entirety.)
|
|
// Doing this means that we also don't need to worry about the
|
|
// |availSpace.height += topMargin| below interacting with pushed
|
|
// floats (which force nscoord_MAX clearance) to cause a
|
|
// constrained height to turn into an unconstrained one.
|
|
aState.mY = startingY;
|
|
aState.mPrevBottomMargin = incomingMargin;
|
|
PushLines(aState, aLine.prev());
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
*aKeepReflowGoing = false;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Now put the Y coordinate back to the top of the top-margin +
|
|
// clearance, and flow the block.
|
|
aState.mY -= topMargin;
|
|
availSpace.y -= topMargin;
|
|
if (NS_UNCONSTRAINEDSIZE != availSpace.height) {
|
|
availSpace.height += topMargin;
|
|
}
|
|
|
|
// Reflow the block into the available space
|
|
// construct the html reflow state for the block. ReflowBlock
|
|
// will initialize it
|
|
nsHTMLReflowState blockHtmlRS(aState.mPresContext, aState.mReflowState, frame,
|
|
nsSize(availSpace.width, availSpace.height));
|
|
blockHtmlRS.mFlags.mHasClearance = aLine->HasClearance();
|
|
|
|
nsFloatManager::SavedState floatManagerState;
|
|
if (mayNeedRetry) {
|
|
blockHtmlRS.mDiscoveredClearance = &clearanceFrame;
|
|
aState.mFloatManager->PushState(&floatManagerState);
|
|
} else if (!applyTopMargin) {
|
|
blockHtmlRS.mDiscoveredClearance = aState.mReflowState.mDiscoveredClearance;
|
|
}
|
|
|
|
nsReflowStatus frameReflowStatus = NS_FRAME_COMPLETE;
|
|
rv = brc.ReflowBlock(availSpace, applyTopMargin, aState.mPrevBottomMargin,
|
|
clearance, aState.IsAdjacentWithTop(),
|
|
aLine.get(), blockHtmlRS, frameReflowStatus, aState);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (mayNeedRetry && clearanceFrame) {
|
|
aState.mFloatManager->PopState(&floatManagerState);
|
|
aState.mY = startingY;
|
|
aState.mPrevBottomMargin = incomingMargin;
|
|
continue;
|
|
}
|
|
|
|
aState.mPrevChild = frame;
|
|
|
|
if (blockHtmlRS.WillReflowAgainForClearance()) {
|
|
// If an ancestor of ours is going to reflow for clearance, we
|
|
// need to avoid calling PlaceBlock, because it unsets dirty bits
|
|
// on the child block (both itself, and through its call to
|
|
// nsFrame::DidReflow), and those dirty bits imply dirtiness for
|
|
// all of the child block, including the lines it didn't reflow.
|
|
NS_ASSERTION(originalPosition == frame->GetPosition(),
|
|
"we need to call PositionChildViews");
|
|
return NS_OK;
|
|
}
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(true, frameReflowStatus);
|
|
#endif
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// None of the child block fits.
|
|
PushLines(aState, aLine.prev());
|
|
*aKeepReflowGoing = false;
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
else {
|
|
// Note: line-break-after a block is a nop
|
|
|
|
// Try to place the child block.
|
|
// Don't force the block to fit if we have positive clearance, because
|
|
// pushing it to the next page would give it more room.
|
|
// Don't force the block to fit if it's impacted by a float. If it is,
|
|
// then pushing it to the next page would give it more room. Note that
|
|
// isImpacted doesn't include impact from the block's own floats.
|
|
bool forceFit = aState.IsAdjacentWithTop() && clearance <= 0 &&
|
|
!floatAvailableSpace.mHasFloats;
|
|
nsCollapsingMargin collapsedBottomMargin;
|
|
nsOverflowAreas overflowAreas;
|
|
*aKeepReflowGoing = brc.PlaceBlock(blockHtmlRS, forceFit, aLine.get(),
|
|
collapsedBottomMargin,
|
|
aLine->mBounds, overflowAreas,
|
|
frameReflowStatus);
|
|
if (aLine->SetCarriedOutBottomMargin(collapsedBottomMargin)) {
|
|
line_iterator nextLine = aLine;
|
|
++nextLine;
|
|
if (nextLine != end_lines()) {
|
|
nextLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
aLine->SetOverflowAreas(overflowAreas);
|
|
if (*aKeepReflowGoing) {
|
|
// Some of the child block fit
|
|
|
|
// Advance to new Y position
|
|
nscoord newY = aLine->mBounds.YMost();
|
|
aState.mY = newY;
|
|
|
|
// Continue the block frame now if it didn't completely fit in
|
|
// the available space.
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(frameReflowStatus)) {
|
|
bool madeContinuation;
|
|
rv = CreateContinuationFor(aState, nullptr, frame, madeContinuation);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsIFrame* nextFrame = frame->GetNextInFlow();
|
|
NS_ASSERTION(nextFrame, "We're supposed to have a next-in-flow by now");
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// If nextFrame used to be an overflow container, make it a normal block
|
|
if (!madeContinuation &&
|
|
(NS_FRAME_IS_OVERFLOW_CONTAINER & nextFrame->GetStateBits())) {
|
|
aState.mOverflowTracker->Finish(frame);
|
|
nsContainerFrame* parent =
|
|
static_cast<nsContainerFrame*>(nextFrame->GetParent());
|
|
rv = parent->StealFrame(aState.mPresContext, nextFrame);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (parent != this)
|
|
ReparentFrame(nextFrame, parent, this);
|
|
mFrames.InsertFrame(nullptr, frame, nextFrame);
|
|
madeContinuation = true; // needs to be added to mLines
|
|
nextFrame->RemoveStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
frameReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
// Push continuation to a new line, but only if we actually made one.
|
|
if (madeContinuation) {
|
|
nsLineBox* line = NewLineBox(nextFrame, true);
|
|
NS_ENSURE_TRUE(line, NS_ERROR_OUT_OF_MEMORY);
|
|
mLines.after_insert(aLine, line);
|
|
}
|
|
|
|
PushLines(aState, aLine);
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
|
|
// If we need to reflow the continuation of the block child,
|
|
// then we'd better reflow our continuation
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
// We also need to make that continuation's line dirty so
|
|
// it gets reflowed when we reflow our next in flow. The
|
|
// nif's line must always be either a line of the nif's
|
|
// parent block (only if we didn't make a continuation) or
|
|
// else one of our own overflow lines. In the latter case
|
|
// the line is already marked dirty, so just handle the
|
|
// first case.
|
|
if (!madeContinuation) {
|
|
nsBlockFrame* nifBlock =
|
|
nsLayoutUtils::GetAsBlock(nextFrame->GetParent());
|
|
NS_ASSERTION(nifBlock,
|
|
"A block's child's next in flow's parent must be a block!");
|
|
for (line_iterator line = nifBlock->begin_lines(),
|
|
line_end = nifBlock->end_lines(); line != line_end; ++line) {
|
|
if (line->Contains(nextFrame)) {
|
|
line->MarkDirty();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*aKeepReflowGoing = false;
|
|
|
|
// The bottom margin for a block is only applied on the last
|
|
// flow block. Since we just continued the child block frame,
|
|
// we know that line->mFirstChild is not the last flow block
|
|
// therefore zero out the running margin value.
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow incomplete, frame=");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" prevBottomMargin=%d, setting to zero\n",
|
|
aState.mPrevBottomMargin);
|
|
#endif
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
else { // frame is complete but its overflow is not complete
|
|
// Disconnect the next-in-flow and put it in our overflow tracker
|
|
if (!madeContinuation &&
|
|
!(NS_FRAME_IS_OVERFLOW_CONTAINER & nextFrame->GetStateBits())) {
|
|
// It already exists, but as a normal next-in-flow, so we need
|
|
// to dig it out of the child lists.
|
|
nsContainerFrame* parent = static_cast<nsContainerFrame*>
|
|
(nextFrame->GetParent());
|
|
rv = parent->StealFrame(aState.mPresContext, nextFrame);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
else if (madeContinuation) {
|
|
mFrames.RemoveFrame(nextFrame);
|
|
}
|
|
|
|
// Put it in our overflow list
|
|
aState.mOverflowTracker->Insert(nextFrame, frameReflowStatus);
|
|
NS_MergeReflowStatusInto(&aState.mReflowStatus, frameReflowStatus);
|
|
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow complete but overflow incomplete for ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" prevBottomMargin=%d collapsedBottomMargin=%d\n",
|
|
aState.mPrevBottomMargin, collapsedBottomMargin.get());
|
|
#endif
|
|
aState.mPrevBottomMargin = collapsedBottomMargin;
|
|
}
|
|
}
|
|
else { // frame is fully complete
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow complete for ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" prevBottomMargin=%d collapsedBottomMargin=%d\n",
|
|
aState.mPrevBottomMargin, collapsedBottomMargin.get());
|
|
#endif
|
|
aState.mPrevBottomMargin = collapsedBottomMargin;
|
|
}
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": frame=");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" carriedOutBottomMargin=%d collapsedBottomMargin=%d => %d\n",
|
|
brc.GetCarriedOutBottomMargin(), collapsedBottomMargin.get(),
|
|
aState.mPrevBottomMargin);
|
|
#endif
|
|
}
|
|
else {
|
|
// None of the block fits. Determine the correct reflow status.
|
|
if (aLine == mLines.front() && !GetPrevInFlow()) {
|
|
// If it's our very first line then we need to be pushed to
|
|
// our parents next-in-flow. Therefore, return break-before
|
|
// status for our reflow status.
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
}
|
|
else {
|
|
// Push the line that didn't fit and any lines that follow it
|
|
// to our next-in-flow.
|
|
PushLines(aState, aLine.prev());
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
}
|
|
}
|
|
break; // out of the reflow retry loop
|
|
}
|
|
|
|
// Now that we've got its final position all figured out, position any child
|
|
// views it may have. Note that the case when frame has a view got handled
|
|
// by FinishReflowChild, but that function didn't have the coordinates needed
|
|
// to correctly decide whether to reposition child views.
|
|
if (originalPosition != frame->GetPosition() && !frame->HasView()) {
|
|
nsContainerFrame::PositionChildViews(frame);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
*aKeepReflowGoing = true;
|
|
|
|
aLine->SetLineIsImpactedByFloat(false);
|
|
|
|
// Setup initial coordinate system for reflowing the inline frames
|
|
// into. Apply a previous block frame's bottom margin first.
|
|
if (ShouldApplyTopMargin(aState, aLine)) {
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
}
|
|
nsFlowAreaRect floatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
|
|
LineReflowStatus lineReflowStatus;
|
|
do {
|
|
nscoord availableSpaceHeight = 0;
|
|
do {
|
|
bool allowPullUp = true;
|
|
nsIContent* forceBreakInContent = nullptr;
|
|
int32_t forceBreakOffset = -1;
|
|
gfxBreakPriority forceBreakPriority = eNoBreak;
|
|
do {
|
|
nsFloatManager::SavedState floatManagerState;
|
|
aState.mReflowState.mFloatManager->PushState(&floatManagerState);
|
|
|
|
// Once upon a time we allocated the first 30 nsLineLayout objects
|
|
// on the stack, and then we switched to the heap. At that time
|
|
// these objects were large (1100 bytes on a 32 bit system).
|
|
// Then the nsLineLayout object was shrunk to 156 bytes by
|
|
// removing some internal buffers. Given that it is so much
|
|
// smaller, the complexity of 2 different ways of allocating
|
|
// no longer makes sense. Now we always allocate on the stack.
|
|
nsLineLayout lineLayout(aState.mPresContext,
|
|
aState.mReflowState.mFloatManager,
|
|
&aState.mReflowState, &aLine);
|
|
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
|
|
if (forceBreakInContent) {
|
|
lineLayout.ForceBreakAtPosition(forceBreakInContent, forceBreakOffset);
|
|
}
|
|
rv = DoReflowInlineFrames(aState, lineLayout, aLine,
|
|
floatAvailableSpace, availableSpaceHeight,
|
|
&floatManagerState, aKeepReflowGoing,
|
|
&lineReflowStatus, allowPullUp);
|
|
lineLayout.EndLineReflow();
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (LINE_REFLOW_REDO_NO_PULL == lineReflowStatus ||
|
|
LINE_REFLOW_REDO_MORE_FLOATS == lineReflowStatus ||
|
|
LINE_REFLOW_REDO_NEXT_BAND == lineReflowStatus) {
|
|
if (lineLayout.NeedsBackup()) {
|
|
NS_ASSERTION(!forceBreakInContent, "Backing up twice; this should never be necessary");
|
|
// If there is no saved break position, then this will set
|
|
// set forceBreakInContent to null and we won't back up, which is
|
|
// correct.
|
|
forceBreakInContent = lineLayout.GetLastOptionalBreakPosition(&forceBreakOffset, &forceBreakPriority);
|
|
} else {
|
|
forceBreakInContent = nullptr;
|
|
}
|
|
// restore the float manager state
|
|
aState.mReflowState.mFloatManager->PopState(&floatManagerState);
|
|
// Clear out float lists
|
|
aState.mCurrentLineFloats.DeleteAll();
|
|
aState.mBelowCurrentLineFloats.DeleteAll();
|
|
}
|
|
|
|
// Don't allow pullup on a subsequent LINE_REFLOW_REDO_NO_PULL pass
|
|
allowPullUp = false;
|
|
} while (LINE_REFLOW_REDO_NO_PULL == lineReflowStatus);
|
|
} while (LINE_REFLOW_REDO_MORE_FLOATS == lineReflowStatus);
|
|
} while (LINE_REFLOW_REDO_NEXT_BAND == lineReflowStatus);
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushTruncatedLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
bool& aKeepReflowGoing)
|
|
{
|
|
line_iterator prevLine = aLine;
|
|
--prevLine;
|
|
PushLines(aState, prevLine);
|
|
aKeepReflowGoing = false;
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static const char* LineReflowStatusNames[] = {
|
|
"LINE_REFLOW_OK", "LINE_REFLOW_STOP", "LINE_REFLOW_REDO_NO_PULL",
|
|
"LINE_REFLOW_REDO_MORE_FLOATS",
|
|
"LINE_REFLOW_REDO_NEXT_BAND", "LINE_REFLOW_TRUNCATED"
|
|
};
|
|
#endif
|
|
|
|
nsresult
|
|
nsBlockFrame::DoReflowInlineFrames(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsFlowAreaRect& aFloatAvailableSpace,
|
|
nscoord& aAvailableSpaceHeight,
|
|
nsFloatManager::SavedState*
|
|
aFloatStateBeforeLine,
|
|
bool* aKeepReflowGoing,
|
|
LineReflowStatus* aLineReflowStatus,
|
|
bool aAllowPullUp)
|
|
{
|
|
// Forget all of the floats on the line
|
|
aLine->FreeFloats(aState.mFloatCacheFreeList);
|
|
aState.mFloatOverflowAreas.Clear();
|
|
|
|
// We need to set this flag on the line if any of our reflow passes
|
|
// are impacted by floats.
|
|
if (aFloatAvailableSpace.mHasFloats)
|
|
aLine->SetLineIsImpactedByFloat(true);
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
|
|
this, aFloatAvailableSpace.mHasFloats);
|
|
#endif
|
|
|
|
nscoord x = aFloatAvailableSpace.mRect.x;
|
|
nscoord availWidth = aFloatAvailableSpace.mRect.width;
|
|
nscoord availHeight;
|
|
if (aState.GetFlag(BRS_UNCONSTRAINEDHEIGHT)) {
|
|
availHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
/* XXX get the height right! */
|
|
availHeight = aFloatAvailableSpace.mRect.height;
|
|
}
|
|
|
|
// Make sure to enable resize optimization before we call BeginLineReflow
|
|
// because it might get disabled there
|
|
aLine->EnableResizeReflowOptimization();
|
|
|
|
// For unicode-bidi: plaintext, we need to get the direction of the line from
|
|
// the resolved paragraph level of the first frame on the line, not the block
|
|
// frame, because the block frame could be split by hard line breaks into
|
|
// multiple paragraphs with different base direction
|
|
uint8_t direction;
|
|
if (GetStyleTextReset()->mUnicodeBidi & NS_STYLE_UNICODE_BIDI_PLAINTEXT) {
|
|
FramePropertyTable *propTable = aState.mPresContext->PropertyTable();
|
|
direction = NS_PTR_TO_INT32(propTable->Get(aLine->mFirstChild,
|
|
BaseLevelProperty())) & 1;
|
|
} else {
|
|
direction = GetStyleVisibility()->mDirection;
|
|
}
|
|
|
|
aLineLayout.BeginLineReflow(x, aState.mY,
|
|
availWidth, availHeight,
|
|
aFloatAvailableSpace.mHasFloats,
|
|
false, /*XXX isTopOfPage*/
|
|
direction);
|
|
|
|
aState.SetFlag(BRS_LINE_LAYOUT_EMPTY, false);
|
|
|
|
// XXX Unfortunately we need to know this before reflowing the first
|
|
// inline frame in the line. FIX ME.
|
|
if ((0 == aLineLayout.GetLineNumber()) &&
|
|
(NS_BLOCK_HAS_FIRST_LETTER_CHILD & mState) &&
|
|
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
|
|
aLineLayout.SetFirstLetterStyleOK(true);
|
|
}
|
|
NS_ASSERTION(!((NS_BLOCK_HAS_FIRST_LETTER_CHILD & mState) &&
|
|
GetPrevContinuation()),
|
|
"first letter child bit should only be on first continuation");
|
|
|
|
// Reflow the frames that are already on the line first
|
|
nsresult rv = NS_OK;
|
|
LineReflowStatus lineReflowStatus = LINE_REFLOW_OK;
|
|
int32_t i;
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
|
|
if (aFloatAvailableSpace.mHasFloats) {
|
|
// There is a soft break opportunity at the start of the line, because
|
|
// we can always move this line down below float(s).
|
|
if (aLineLayout.NotifyOptionalBreakPosition(frame->GetContent(), 0, true, eNormalBreak)) {
|
|
lineReflowStatus = LINE_REFLOW_REDO_NEXT_BAND;
|
|
}
|
|
}
|
|
|
|
// need to repeatedly call GetChildCount here, because the child
|
|
// count can change during the loop!
|
|
for (i = 0; LINE_REFLOW_OK == lineReflowStatus && i < aLine->GetChildCount();
|
|
i++, frame = frame->GetNextSibling()) {
|
|
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
|
|
&lineReflowStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (LINE_REFLOW_OK != lineReflowStatus) {
|
|
// It is possible that one or more of next lines are empty
|
|
// (because of DeleteNextInFlowChild). If so, delete them now
|
|
// in case we are finished.
|
|
++aLine;
|
|
while ((aLine != end_lines()) && (0 == aLine->GetChildCount())) {
|
|
// XXX Is this still necessary now that DeleteNextInFlowChild
|
|
// uses DoRemoveFrame?
|
|
nsLineBox *toremove = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
NS_ASSERTION(nullptr == toremove->mFirstChild, "bad empty line");
|
|
FreeLineBox(toremove);
|
|
}
|
|
--aLine;
|
|
|
|
NS_ASSERTION(lineReflowStatus != LINE_REFLOW_TRUNCATED,
|
|
"ReflowInlineFrame should never determine that a line "
|
|
"needs to go to the next page/column");
|
|
}
|
|
}
|
|
|
|
// Don't pull up new frames into lines with continuation placeholders
|
|
if (aAllowPullUp) {
|
|
// Pull frames and reflow them until we can't
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
frame = PullFrame(aState, aLine);
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
int32_t oldCount = aLine->GetChildCount();
|
|
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
|
|
&lineReflowStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (aLine->GetChildCount() != oldCount) {
|
|
// We just created a continuation for aFrame AND its going
|
|
// to end up on this line (e.g. :first-letter
|
|
// situation). Therefore we have to loop here before trying
|
|
// to pull another frame.
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
aState.SetFlag(BRS_LINE_LAYOUT_EMPTY, aLineLayout.LineIsEmpty());
|
|
|
|
// We only need to backup if the line isn't going to be reflowed again anyway
|
|
bool needsBackup = aLineLayout.NeedsBackup() &&
|
|
(lineReflowStatus == LINE_REFLOW_STOP || lineReflowStatus == LINE_REFLOW_OK);
|
|
if (needsBackup && aLineLayout.HaveForcedBreakPosition()) {
|
|
NS_WARNING("We shouldn't be backing up more than once! "
|
|
"Someone must have set a break opportunity beyond the available width, "
|
|
"even though there were better break opportunities before it");
|
|
needsBackup = false;
|
|
}
|
|
if (needsBackup) {
|
|
// We need to try backing up to before a text run
|
|
int32_t offset;
|
|
gfxBreakPriority breakPriority;
|
|
nsIContent* breakContent = aLineLayout.GetLastOptionalBreakPosition(&offset, &breakPriority);
|
|
// XXX It's possible, in fact not unusual, for the break opportunity to already
|
|
// be the end of the line. We should detect that and optimize to not
|
|
// re-do the line.
|
|
if (breakContent) {
|
|
// We can back up!
|
|
lineReflowStatus = LINE_REFLOW_REDO_NO_PULL;
|
|
}
|
|
} else {
|
|
// In case we reflow this line again, remember that we don't
|
|
// need to force any breaking
|
|
aLineLayout.ClearOptionalBreakPosition();
|
|
}
|
|
|
|
if (LINE_REFLOW_REDO_NEXT_BAND == lineReflowStatus) {
|
|
// This happens only when we have a line that is impacted by
|
|
// floats and the first element in the line doesn't fit with
|
|
// the floats.
|
|
//
|
|
// What we do is to advance past the first float we find and
|
|
// then reflow the line all over again.
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aFloatAvailableSpace.mRect.height,
|
|
"unconstrained height on totally empty line");
|
|
|
|
// See the analogous code for blocks in nsBlockReflowState::ClearFloats.
|
|
if (aFloatAvailableSpace.mRect.height > 0) {
|
|
NS_ASSERTION(aFloatAvailableSpace.mHasFloats,
|
|
"redo line on totally empty line with non-empty band...");
|
|
// We should never hit this case if we've placed floats on the
|
|
// line; if we have, then the GetFloatAvailableSpace call is wrong
|
|
// and needs to happen after the caller pops the space manager
|
|
// state.
|
|
aState.mFloatManager->AssertStateMatches(aFloatStateBeforeLine);
|
|
aState.mY += aFloatAvailableSpace.mRect.height;
|
|
aFloatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
} else {
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableHeight,
|
|
"We shouldn't be running out of height here");
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableHeight) {
|
|
// just move it down a bit to try to get out of this mess
|
|
aState.mY += 1;
|
|
// We should never hit this case if we've placed floats on the
|
|
// line; if we have, then the GetFloatAvailableSpace call is wrong
|
|
// and needs to happen after the caller pops the space manager
|
|
// state.
|
|
aState.mFloatManager->AssertStateMatches(aFloatStateBeforeLine);
|
|
aFloatAvailableSpace = aState.GetFloatAvailableSpace();
|
|
} else {
|
|
// There's nowhere to retry placing the line, so we want to push
|
|
// it to the next page/column where its contents can fit not
|
|
// next to a float.
|
|
lineReflowStatus = LINE_REFLOW_TRUNCATED;
|
|
// Push the line that didn't fit
|
|
PushTruncatedLine(aState, aLine, *aKeepReflowGoing);
|
|
}
|
|
}
|
|
|
|
// XXX: a small optimization can be done here when paginating:
|
|
// if the new Y coordinate is past the end of the block then
|
|
// push the line and return now instead of later on after we are
|
|
// past the float.
|
|
}
|
|
else if (LINE_REFLOW_TRUNCATED != lineReflowStatus &&
|
|
LINE_REFLOW_REDO_NO_PULL != lineReflowStatus) {
|
|
// If we are propagating out a break-before status then there is
|
|
// no point in placing the line.
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
|
|
if (!PlaceLine(aState, aLineLayout, aLine, aFloatStateBeforeLine,
|
|
aFloatAvailableSpace.mRect, aAvailableSpaceHeight,
|
|
aKeepReflowGoing)) {
|
|
lineReflowStatus = LINE_REFLOW_REDO_MORE_FLOATS;
|
|
// PlaceLine already called GetAvailableSpaceForHeight for us.
|
|
}
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
printf("Line reflow status = %s\n", LineReflowStatusNames[lineReflowStatus]);
|
|
}
|
|
#endif
|
|
|
|
if (aLineLayout.GetDirtyNextLine()) {
|
|
// aLine may have been pushed to the overflow lines.
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
// We can't just compare iterators front() to aLine here, since they may be in
|
|
// different lists.
|
|
bool pushedToOverflowLines = overflowLines &&
|
|
overflowLines->mLines.front() == aLine.get();
|
|
if (pushedToOverflowLines) {
|
|
// aLine is stale, it's associated with the main line list but it should
|
|
// be associated with the overflow line list now
|
|
aLine = overflowLines->mLines.begin();
|
|
}
|
|
nsBlockInFlowLineIterator iter(this, aLine, pushedToOverflowLines);
|
|
if (iter.Next() && iter.GetLine()->IsInline()) {
|
|
iter.GetLine()->MarkDirty();
|
|
if (iter.GetContainer() != this) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
}
|
|
|
|
*aLineReflowStatus = lineReflowStatus;
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Reflow an inline frame. The reflow status is mapped from the frames
|
|
* reflow status to the lines reflow status (not to our reflow status).
|
|
* The line reflow status is simple: true means keep placing frames
|
|
* on the line; false means don't (the line is done). If the line
|
|
* has some sort of breaking affect then aLine's break-type will be set
|
|
* to something other than NS_STYLE_CLEAR_NONE.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aFrame);
|
|
|
|
*aLineReflowStatus = LINE_REFLOW_OK;
|
|
|
|
#ifdef NOISY_FIRST_LETTER
|
|
ListTag(stdout);
|
|
printf(": reflowing ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" reflowingFirstLetter=%s\n",
|
|
aLineLayout.GetFirstLetterStyleOK() ? "on" : "off");
|
|
#endif
|
|
|
|
// Reflow the inline frame
|
|
nsReflowStatus frameReflowStatus;
|
|
bool pushedFrame;
|
|
nsresult rv = aLineLayout.ReflowFrame(aFrame, frameReflowStatus,
|
|
nullptr, pushedFrame);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aLineLayout.SetDirtyNextLine();
|
|
}
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
#ifdef REALLY_NOISY_REFLOW_CHILD
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": status=%x\n", frameReflowStatus);
|
|
#endif
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(false, frameReflowStatus);
|
|
#endif
|
|
|
|
// Send post-reflow notification
|
|
aState.mPrevChild = aFrame;
|
|
|
|
/* XXX
|
|
This is where we need to add logic to handle some odd behavior.
|
|
For one thing, we should usually place at least one thing next
|
|
to a left float, even when that float takes up all the width on a line.
|
|
see bug 22496
|
|
*/
|
|
|
|
// Process the child frames reflow status. There are 5 cases:
|
|
// complete, not-complete, break-before, break-after-complete,
|
|
// break-after-not-complete. There are two situations: we are a
|
|
// block or we are an inline. This makes a total of 10 cases
|
|
// (fortunately, there is some overlap).
|
|
aLine->SetBreakTypeAfter(NS_STYLE_CLEAR_NONE);
|
|
if (NS_INLINE_IS_BREAK(frameReflowStatus) ||
|
|
(NS_STYLE_CLEAR_NONE != aState.mFloatBreakType)) {
|
|
// Always abort the line reflow (because a line break is the
|
|
// minimal amount of break we do).
|
|
*aLineReflowStatus = LINE_REFLOW_STOP;
|
|
|
|
// XXX what should aLine's break-type be set to in all these cases?
|
|
uint8_t breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
|
|
NS_ASSERTION((NS_STYLE_CLEAR_NONE != breakType) ||
|
|
(NS_STYLE_CLEAR_NONE != aState.mFloatBreakType), "bad break type");
|
|
NS_ASSERTION(NS_STYLE_CLEAR_PAGE != breakType, "no page breaks yet");
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// Break-before cases.
|
|
if (aFrame == aLine->mFirstChild) {
|
|
// If we break before the first frame on the line then we must
|
|
// be trying to place content where there's no room (e.g. on a
|
|
// line with wide floats). Inform the caller to reflow the
|
|
// line after skipping past a float.
|
|
*aLineReflowStatus = LINE_REFLOW_REDO_NEXT_BAND;
|
|
}
|
|
else {
|
|
// It's not the first child on this line so go ahead and split
|
|
// the line. We will see the frame again on the next-line.
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame, aLineReflowStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If we're splitting the line because the frame didn't fit and it
|
|
// was pushed, then mark the line as having word wrapped. We need to
|
|
// know that if we're shrink wrapping our width
|
|
if (pushedFrame) {
|
|
aLine->SetLineWrapped(true);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// If a float split and its prev-in-flow was followed by a <BR>, then combine
|
|
// the <BR>'s break type with the inline's break type (the inline will be the very
|
|
// next frame after the split float).
|
|
if (NS_STYLE_CLEAR_NONE != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
// Break-after cases
|
|
if (breakType == NS_STYLE_CLEAR_LINE) {
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
breakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
}
|
|
aLine->SetBreakTypeAfter(breakType);
|
|
if (NS_FRAME_IS_COMPLETE(frameReflowStatus)) {
|
|
// Split line, but after the frame just reflowed
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling(), aLineReflowStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (NS_INLINE_IS_BREAK_AFTER(frameReflowStatus) &&
|
|
!aLineLayout.GetLineEndsInBR()) {
|
|
aLineLayout.SetDirtyNextLine();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!NS_FRAME_IS_FULLY_COMPLETE(frameReflowStatus)) {
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
|
|
bool madeContinuation;
|
|
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Remember that the line has wrapped
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
aLine->SetLineWrapped(true);
|
|
}
|
|
|
|
// If we just ended a first-letter frame or reflowed a placeholder then
|
|
// don't split the line and don't stop the line reflow...
|
|
// But if we are going to stop anyways we'd better split the line.
|
|
if ((!(frameReflowStatus & NS_INLINE_BREAK_FIRST_LETTER_COMPLETE) &&
|
|
nsGkAtoms::placeholderFrame != frameType) ||
|
|
*aLineReflowStatus == LINE_REFLOW_STOP) {
|
|
// Split line after the current frame
|
|
*aLineReflowStatus = LINE_REFLOW_STOP;
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling(), aLineReflowStatus);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame,
|
|
bool& aMadeNewFrame)
|
|
{
|
|
aMadeNewFrame = false;
|
|
|
|
if (!aFrame->GetNextInFlow()) {
|
|
nsIFrame* newFrame;
|
|
nsresult rv = aState.mPresContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(aState.mPresContext, aFrame, this, &newFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
mFrames.InsertFrame(nullptr, aFrame, newFrame);
|
|
|
|
if (aLine) {
|
|
aLine->NoteFrameAdded(newFrame);
|
|
}
|
|
|
|
aMadeNewFrame = true;
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyLines(false);
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitFloat(nsBlockReflowState& aState,
|
|
nsIFrame* aFloat,
|
|
nsReflowStatus aFloatStatus)
|
|
{
|
|
nsIFrame* nextInFlow = aFloat->GetNextInFlow();
|
|
if (nextInFlow) {
|
|
nsContainerFrame *oldParent =
|
|
static_cast<nsContainerFrame*>(nextInFlow->GetParent());
|
|
DebugOnly<nsresult> rv = oldParent->StealFrame(aState.mPresContext, nextInFlow);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "StealFrame failed");
|
|
if (oldParent != this) {
|
|
ReparentFrame(nextInFlow, oldParent, this);
|
|
}
|
|
} else {
|
|
nsresult rv = aState.mPresContext->PresShell()->FrameConstructor()->
|
|
CreateContinuingFrame(aState.mPresContext, aFloat, this, &nextInFlow);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
if (NS_FRAME_OVERFLOW_IS_INCOMPLETE(aFloatStatus))
|
|
aFloat->GetNextInFlow()->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
|
|
// The containing block is now overflow-incomplete.
|
|
NS_FRAME_SET_OVERFLOW_INCOMPLETE(aState.mReflowStatus);
|
|
|
|
if (aFloat->GetStyleDisplay()->mFloats == NS_STYLE_FLOAT_LEFT) {
|
|
aState.mFloatManager->SetSplitLeftFloatAcrossBreak();
|
|
} else {
|
|
NS_ABORT_IF_FALSE(aFloat->GetStyleDisplay()->mFloats ==
|
|
NS_STYLE_FLOAT_RIGHT, "unexpected float side");
|
|
aState.mFloatManager->SetSplitRightFloatAcrossBreak();
|
|
}
|
|
|
|
aState.AppendPushedFloat(nextInFlow);
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsFloatCache*
|
|
GetLastFloat(nsLineBox* aLine)
|
|
{
|
|
nsFloatCache* fc = aLine->GetFirstFloat();
|
|
while (fc && fc->Next()) {
|
|
fc = fc->Next();
|
|
}
|
|
return fc;
|
|
}
|
|
|
|
static bool
|
|
CheckPlaceholderInLine(nsIFrame* aBlock, nsLineBox* aLine, nsFloatCache* aFC)
|
|
{
|
|
if (!aFC)
|
|
return true;
|
|
NS_ASSERTION(!aFC->mFloat->GetPrevContinuation(),
|
|
"float in a line should never be a continuation");
|
|
NS_ASSERTION(!(aFC->mFloat->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT),
|
|
"float in a line should never be a pushed float");
|
|
nsIFrame* ph = aBlock->PresContext()->FrameManager()->
|
|
GetPlaceholderFrameFor(aFC->mFloat->GetFirstInFlow());
|
|
for (nsIFrame* f = ph; f; f = f->GetParent()) {
|
|
if (f->GetParent() == aBlock)
|
|
return aLine->Contains(f);
|
|
}
|
|
NS_ASSERTION(false, "aBlock is not an ancestor of aFrame!");
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame,
|
|
LineReflowStatus* aLineReflowStatus)
|
|
{
|
|
NS_ABORT_IF_FALSE(aLine->IsInline(), "illegal SplitLine on block line");
|
|
|
|
int32_t pushCount = aLine->GetChildCount() - aLineLayout.GetCurrentSpanCount();
|
|
NS_ABORT_IF_FALSE(pushCount >= 0, "bad push count");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("split line: from line=%p pushCount=%d aFrame=",
|
|
static_cast<void*>(aLine.get()), pushCount);
|
|
if (aFrame) {
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
}
|
|
else {
|
|
printf("(null)");
|
|
}
|
|
printf("\n");
|
|
if (gReallyNoisyReflow) {
|
|
aLine->List(stdout, gNoiseIndent+1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (0 != pushCount) {
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount() > pushCount, "bad push");
|
|
NS_ABORT_IF_FALSE(nullptr != aFrame, "whoops");
|
|
#ifdef DEBUG
|
|
{
|
|
nsIFrame *f = aFrame;
|
|
int32_t count = pushCount;
|
|
while (f && count > 0) {
|
|
f = f->GetNextSibling();
|
|
--count;
|
|
}
|
|
NS_ASSERTION(count == 0, "Not enough frames to push");
|
|
}
|
|
#endif
|
|
|
|
// Put frames being split out into their own line
|
|
nsLineBox* newLine = NewLineBox(aLine, aFrame, pushCount);
|
|
if (!newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mLines.after_insert(aLine, newLine);
|
|
#ifdef DEBUG
|
|
if (gReallyNoisyReflow) {
|
|
newLine->List(stdout, gNoiseIndent+1);
|
|
}
|
|
#endif
|
|
|
|
// Let line layout know that some frames are no longer part of its
|
|
// state.
|
|
aLineLayout.SplitLineTo(aLine->GetChildCount());
|
|
|
|
// If floats have been placed whose placeholders have been pushed to the new
|
|
// line, we need to reflow the old line again. We don't want to look at the
|
|
// frames in the new line, because as a large paragraph is laid out the
|
|
// we'd get O(N^2) performance. So instead we just check that the last
|
|
// float and the last below-current-line float are still in aLine.
|
|
if (!CheckPlaceholderInLine(this, aLine, GetLastFloat(aLine)) ||
|
|
!CheckPlaceholderInLine(this, aLine, aState.mBelowCurrentLineFloats.Tail())) {
|
|
*aLineReflowStatus = LINE_REFLOW_REDO_NO_PULL;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
#endif
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::IsLastLine(nsBlockReflowState& aState,
|
|
line_iterator aLine)
|
|
{
|
|
while (++aLine != end_lines()) {
|
|
// There is another line
|
|
if (0 != aLine->GetChildCount()) {
|
|
// If the next line is a block line then this line is the last in a
|
|
// group of inline lines.
|
|
return aLine->IsBlock();
|
|
}
|
|
// The next line is empty, try the next one
|
|
}
|
|
|
|
// XXX Not sure about this part
|
|
// Try our next-in-flows lines to answer the question
|
|
nsBlockFrame* nextInFlow = (nsBlockFrame*) GetNextInFlow();
|
|
while (nullptr != nextInFlow) {
|
|
for (line_iterator line = nextInFlow->begin_lines(),
|
|
line_end = nextInFlow->end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (0 != line->GetChildCount())
|
|
return line->IsBlock();
|
|
}
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->GetNextInFlow();
|
|
}
|
|
|
|
// This is the last line - so don't allow justification
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsFloatManager::SavedState *aFloatStateBeforeLine,
|
|
nsRect& aFloatAvailableSpace,
|
|
nscoord& aAvailableSpaceHeight,
|
|
bool* aKeepReflowGoing)
|
|
{
|
|
// Trim extra white-space from the line before placing the frames
|
|
aLineLayout.TrimTrailingWhiteSpace();
|
|
|
|
// Vertically align the frames on this line.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. It's only placed on the second line in a
|
|
// rare case: when the first line is empty.
|
|
bool addedBullet = false;
|
|
if (HasOutsideBullet() &&
|
|
((aLine == mLines.front() &&
|
|
(!aLineLayout.IsZeroHeight() || (aLine == mLines.back()))) ||
|
|
(mLines.front() != mLines.back() &&
|
|
0 == mLines.front()->mBounds.height &&
|
|
aLine == mLines.begin().next()))) {
|
|
nsHTMLReflowMetrics metrics;
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
ReflowBullet(bullet, aState, metrics, aState.mY);
|
|
NS_ASSERTION(!BulletIsEmpty() || metrics.height == 0,
|
|
"empty bullet took up space");
|
|
aLineLayout.AddBulletFrame(bullet, metrics);
|
|
addedBullet = true;
|
|
}
|
|
aLineLayout.VerticalAlignLine();
|
|
|
|
// We want to compare to the available space that we would have had in
|
|
// the line's height *before* we placed any floats in the line itself.
|
|
// Floats that are in the line are handled during line reflow (and may
|
|
// result in floats being pushed to below the line or (I HOPE???) in a
|
|
// reflow with a forced break position).
|
|
nsRect oldFloatAvailableSpace(aFloatAvailableSpace);
|
|
// As we redo for floats, we can't reduce the amount of height we're
|
|
// checking.
|
|
aAvailableSpaceHeight = NS_MAX(aAvailableSpaceHeight, aLine->mBounds.height);
|
|
aFloatAvailableSpace =
|
|
aState.GetFloatAvailableSpaceForHeight(aLine->mBounds.y,
|
|
aAvailableSpaceHeight,
|
|
aFloatStateBeforeLine).mRect;
|
|
NS_ASSERTION(aFloatAvailableSpace.y == oldFloatAvailableSpace.y, "yikes");
|
|
// Restore the height to the position of the next band.
|
|
aFloatAvailableSpace.height = oldFloatAvailableSpace.height;
|
|
// If the available space between the floats is smaller now that we
|
|
// know the height, return false (and cause another pass with
|
|
// LINE_REFLOW_REDO_MORE_FLOATS).
|
|
if (AvailableSpaceShrunk(oldFloatAvailableSpace, aFloatAvailableSpace)) {
|
|
return false;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
static nscoord lastHeight = 0;
|
|
if (CRAZY_HEIGHT(aLine->mBounds.y)) {
|
|
lastHeight = aLine->mBounds.y;
|
|
if (abs(aLine->mBounds.y - lastHeight) > CRAZY_H/10) {
|
|
nsFrame::ListTag(stdout);
|
|
printf(": line=%p y=%d line.bounds.height=%d\n",
|
|
static_cast<void*>(aLine.get()),
|
|
aLine->mBounds.y, aLine->mBounds.height);
|
|
}
|
|
}
|
|
else {
|
|
lastHeight = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Only block frames horizontally align their children because
|
|
// inline frames "shrink-wrap" around their children (therefore
|
|
// there is no extra horizontal space).
|
|
const nsStyleText* styleText = GetStyleText();
|
|
|
|
/**
|
|
* text-align-last defaults to the same value as text-align when
|
|
* text-align-last is set to auto (except when text-align is set to justify),
|
|
* so in that case we don't need to set isLastLine.
|
|
*
|
|
* In other words, isLastLine really means isLastLineAndWeCare.
|
|
*/
|
|
bool isLastLine =
|
|
!IsSVGText() &&
|
|
((NS_STYLE_TEXT_ALIGN_AUTO != styleText->mTextAlignLast ||
|
|
NS_STYLE_TEXT_ALIGN_JUSTIFY == styleText->mTextAlign) &&
|
|
(aLineLayout.GetLineEndsInBR() ||
|
|
IsLastLine(aState, aLine)));
|
|
aLineLayout.HorizontalAlignFrames(aLine->mBounds, isLastLine);
|
|
// XXX: not only bidi: right alignment can be broken after
|
|
// RelativePositionFrames!!!
|
|
// XXXldb Is something here considering relatively positioned frames at
|
|
// other than their original positions?
|
|
#ifdef IBMBIDI
|
|
// XXXldb Why don't we do this earlier?
|
|
if (aState.mPresContext->BidiEnabled()) {
|
|
if (!aState.mPresContext->IsVisualMode() ||
|
|
GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
|
|
nsBidiPresUtils::ReorderFrames(aLine->mFirstChild, aLine->GetChildCount());
|
|
} // not visual mode
|
|
} // bidi enabled
|
|
#endif // IBMBIDI
|
|
|
|
// From here on, pfd->mBounds rectangles are incorrect because bidi
|
|
// might have moved frames around!
|
|
nsOverflowAreas overflowAreas;
|
|
aLineLayout.RelativePositionFrames(overflowAreas);
|
|
aLine->SetOverflowAreas(overflowAreas);
|
|
if (addedBullet) {
|
|
aLineLayout.RemoveBulletFrame(GetOutsideBullet());
|
|
}
|
|
|
|
// Inline lines do not have margins themselves; however they are
|
|
// impacted by prior block margins. If this line ends up having some
|
|
// height then we zero out the previous bottom margin value that was
|
|
// already applied to the line's starting Y coordinate. Otherwise we
|
|
// leave it be so that the previous blocks bottom margin can be
|
|
// collapsed with a block that follows.
|
|
nscoord newY;
|
|
|
|
if (!aLine->CachedIsEmpty()) {
|
|
// This line has some height. Therefore the application of the
|
|
// previous-bottom-margin should stick.
|
|
aState.mPrevBottomMargin.Zero();
|
|
newY = aLine->mBounds.YMost();
|
|
}
|
|
else {
|
|
// Don't let the previous-bottom-margin value affect the newY
|
|
// coordinate (it was applied in ReflowInlineFrames speculatively)
|
|
// since the line is empty.
|
|
// We already called |ShouldApplyTopMargin|, and if we applied it
|
|
// then BRS_APPLYTOPMARGIN is set.
|
|
nscoord dy = aState.GetFlag(BRS_APPLYTOPMARGIN)
|
|
? -aState.mPrevBottomMargin.get() : 0;
|
|
newY = aState.mY + dy;
|
|
}
|
|
|
|
// See if the line fit. If it doesn't we need to push it. Our first
|
|
// line will always fit.
|
|
if (mLines.front() != aLine &&
|
|
newY > aState.mBottomEdge &&
|
|
aState.mBottomEdge != NS_UNCONSTRAINEDSIZE) {
|
|
// Push this line and all of its children and anything else that
|
|
// follows to our next-in-flow
|
|
NS_ASSERTION((aState.mCurrentLine == aLine), "oops");
|
|
PushLines(aState, aLine.prev());
|
|
|
|
// Stop reflow and whack the reflow status if reflow hasn't
|
|
// already been stopped.
|
|
if (*aKeepReflowGoing) {
|
|
NS_FRAME_SET_INCOMPLETE(aState.mReflowStatus);
|
|
*aKeepReflowGoing = false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
aState.mY = newY;
|
|
|
|
// Add the already placed current-line floats to the line
|
|
aLine->AppendFloats(aState.mCurrentLineFloats);
|
|
|
|
// Any below current line floats to place?
|
|
if (aState.mBelowCurrentLineFloats.NotEmpty()) {
|
|
// Reflow the below-current-line floats, which places on the line's
|
|
// float list.
|
|
aState.PlaceBelowCurrentLineFloats(aState.mBelowCurrentLineFloats, aLine);
|
|
aLine->AppendFloats(aState.mBelowCurrentLineFloats);
|
|
}
|
|
|
|
// When a line has floats, factor them into the combined-area
|
|
// computations.
|
|
if (aLine->HasFloats()) {
|
|
// Combine the float combined area (stored in aState) and the
|
|
// value computed by the line layout code.
|
|
nsOverflowAreas lineOverflowAreas;
|
|
NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
|
|
nsRect &o = lineOverflowAreas.Overflow(otype);
|
|
o = aLine->GetOverflowArea(otype);
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
printf(": overflow %d lineCA=%d,%d,%d,%d floatCA=%d,%d,%d,%d\n",
|
|
otype,
|
|
o.x, o.y, o.width, o.height,
|
|
aState.mFloatOverflowAreas.Overflow(otype).x,
|
|
aState.mFloatOverflowAreas.Overflow(otype).y,
|
|
aState.mFloatOverflowAreas.Overflow(otype).width,
|
|
aState.mFloatOverflowAreas.Overflow(otype).height);
|
|
#endif
|
|
o.UnionRect(aState.mFloatOverflowAreas.Overflow(otype), o);
|
|
|
|
#ifdef NOISY_COMBINED_AREA
|
|
printf(" ==> final lineCA=%d,%d,%d,%d\n",
|
|
o.x, o.y, o.width, o.height);
|
|
#endif
|
|
}
|
|
aLine->SetOverflowAreas(lineOverflowAreas);
|
|
}
|
|
|
|
// Apply break-after clearing if necessary
|
|
// This must stay in sync with |ReflowDirtyLines|.
|
|
if (aLine->HasFloatBreakAfter()) {
|
|
aState.mY = aState.ClearFloats(aState.mY, aLine->GetBreakTypeAfter());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushLines(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLineBefore)
|
|
{
|
|
// NOTE: aLineBefore is always a normal line, not an overflow line.
|
|
// The following expression will assert otherwise.
|
|
DebugOnly<bool> check = aLineBefore == mLines.begin();
|
|
|
|
nsLineList::iterator overBegin(aLineBefore.next());
|
|
|
|
// PushTruncatedPlaceholderLine sometimes pushes the first line. Ugh.
|
|
bool firstLine = overBegin == begin_lines();
|
|
|
|
if (overBegin != end_lines()) {
|
|
// Remove floats in the lines from mFloats
|
|
nsFrameList floats;
|
|
CollectFloats(overBegin->mFirstChild, floats, false, true);
|
|
|
|
if (floats.NotEmpty()) {
|
|
// Push the floats onto the front of the overflow out-of-flows list
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.InsertFrames(nullptr, nullptr, floats);
|
|
}
|
|
|
|
// overflow lines can already exist in some cases, in particular,
|
|
// when shrinkwrapping and we discover that the shrinkwap causes
|
|
// the height of some child block to grow which creates additional
|
|
// overflowing content. In such cases we must prepend the new
|
|
// overflow to the existing overflow.
|
|
FrameLines* overflowLines = RemoveOverflowLines();
|
|
if (!overflowLines) {
|
|
// XXXldb use presshell arena!
|
|
overflowLines = new FrameLines();
|
|
}
|
|
if (overflowLines) {
|
|
nsIFrame* lineBeforeLastFrame;
|
|
if (firstLine) {
|
|
lineBeforeLastFrame = nullptr; // removes all frames
|
|
} else {
|
|
nsIFrame* f = overBegin->mFirstChild;
|
|
lineBeforeLastFrame = f ? f->GetPrevSibling() : mFrames.LastChild();
|
|
NS_ASSERTION(!f || lineBeforeLastFrame == aLineBefore->LastChild(),
|
|
"unexpected line frames");
|
|
}
|
|
nsFrameList pushedFrames = mFrames.RemoveFramesAfter(lineBeforeLastFrame);
|
|
overflowLines->mFrames.InsertFrames(nullptr, nullptr, pushedFrames);
|
|
|
|
overflowLines->mLines.splice(overflowLines->mLines.begin(), mLines,
|
|
overBegin, end_lines());
|
|
NS_ASSERTION(!overflowLines->mLines.empty(), "should not be empty");
|
|
// this takes ownership but it won't delete it immediately so we
|
|
// can keep using it.
|
|
SetOverflowLines(overflowLines);
|
|
|
|
// Mark all the overflow lines dirty so that they get reflowed when
|
|
// they are pulled up by our next-in-flow.
|
|
|
|
// XXXldb Can this get called O(N) times making the whole thing O(N^2)?
|
|
for (line_iterator line = overflowLines->mLines.begin(),
|
|
line_end = overflowLines->mLines.end();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
line->MarkPreviousMarginDirty();
|
|
line->mBounds.SetRect(0, 0, 0, 0);
|
|
if (line->HasFloats()) {
|
|
line->FreeFloats(aState.mFloatCacheFreeList);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
}
|
|
|
|
// The overflowLines property is stored as a pointer to a line list,
|
|
// which must be deleted. However, the following functions all maintain
|
|
// the invariant that the property is never set if the list is empty.
|
|
|
|
bool
|
|
nsBlockFrame::DrainOverflowLines()
|
|
{
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
// Steal the prev-in-flow's overflow lines and prepend them.
|
|
bool didFindOverflow = false;
|
|
nsBlockFrame* prevBlock = static_cast<nsBlockFrame*>(GetPrevInFlow());
|
|
if (prevBlock) {
|
|
prevBlock->ClearLineCursor();
|
|
FrameLines* overflowLines = prevBlock->RemoveOverflowLines();
|
|
if (overflowLines) {
|
|
// Make all the frames on the overflow line list mine.
|
|
ReparentFrames(overflowLines->mFrames, prevBlock, this);
|
|
|
|
// Make the overflow out-of-flow frames mine too.
|
|
nsAutoOOFFrameList oofs(prevBlock);
|
|
if (oofs.mList.NotEmpty()) {
|
|
ReparentFrames(oofs.mList, prevBlock, this);
|
|
mFloats.InsertFrames(nullptr, nullptr, oofs.mList);
|
|
}
|
|
|
|
if (!mLines.empty()) {
|
|
// Remember to recompute the margins on the first line. This will
|
|
// also recompute the correct deltaY if necessary.
|
|
mLines.front()->MarkPreviousMarginDirty();
|
|
}
|
|
// The overflow lines have already been marked dirty and their previous
|
|
// margins marked dirty also.
|
|
|
|
// Prepend the overflow frames/lines to our principal list.
|
|
mFrames.InsertFrames(nullptr, nullptr, overflowLines->mFrames);
|
|
mLines.splice(mLines.begin(), overflowLines->mLines);
|
|
NS_ASSERTION(overflowLines->mLines.empty(), "splice should empty list");
|
|
delete overflowLines;
|
|
didFindOverflow = true;
|
|
}
|
|
}
|
|
|
|
// Now append our own overflow lines.
|
|
return DrainSelfOverflowList() || didFindOverflow;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::DrainSelfOverflowList()
|
|
{
|
|
// No need to reparent frames in our own overflow lines/oofs, because they're
|
|
// already ours. But we should put overflow floats back in mFloats.
|
|
FrameLines* ourOverflowLines = RemoveOverflowLines();
|
|
if (ourOverflowLines) {
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.NotEmpty()) {
|
|
// The overflow floats go after our regular floats.
|
|
mFloats.AppendFrames(nullptr, oofs.mList);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
if (!ourOverflowLines->mLines.empty()) {
|
|
mFrames.AppendFrames(nullptr, ourOverflowLines->mFrames);
|
|
mLines.splice(mLines.end(), ourOverflowLines->mLines);
|
|
}
|
|
delete ourOverflowLines;
|
|
return true;
|
|
}
|
|
|
|
// This function assumes our prev-in-flow has completed reflow and its
|
|
// mFloats may contain frames at the end of its float list, marked with
|
|
// NS_FRAME_IS_PUSHED_FLOAT, that should be pulled to this block.
|
|
void
|
|
nsBlockFrame::DrainPushedFloats(nsBlockReflowState& aState)
|
|
{
|
|
#ifdef DEBUG
|
|
// Between when we drain pushed floats and when we complete reflow,
|
|
// we're allowed to have multiple continuations of the same float on
|
|
// our floats list, since a first-in-flow might get pushed to a later
|
|
// continuation of its containing block. But it's not permitted
|
|
// outside that time.
|
|
nsLayoutUtils::AssertNoDuplicateContinuations(this, mFloats);
|
|
#endif
|
|
|
|
// Take any continuations we need to take from our prev-in-flow.
|
|
nsBlockFrame* prevBlock = static_cast<nsBlockFrame*>(GetPrevInFlow());
|
|
if (!prevBlock)
|
|
return;
|
|
nsFrameList *list = prevBlock->RemovePushedFloats();
|
|
if (list) {
|
|
if (list->NotEmpty()) {
|
|
mFloats.InsertFrames(this, nullptr, *list);
|
|
}
|
|
delete list;
|
|
}
|
|
}
|
|
|
|
nsBlockFrame::FrameLines*
|
|
nsBlockFrame::GetOverflowLines() const
|
|
{
|
|
if (!HasOverflowLines()) {
|
|
return nullptr;
|
|
}
|
|
FrameLines* prop =
|
|
static_cast<FrameLines*>(Properties().Get(OverflowLinesProperty()));
|
|
NS_ASSERTION(prop && !prop->mLines.empty() &&
|
|
prop->mLines.front()->mFirstChild == prop->mFrames.FirstChild(),
|
|
"value should always be stored and non-empty when state set");
|
|
return prop;
|
|
}
|
|
|
|
nsBlockFrame::FrameLines*
|
|
nsBlockFrame::RemoveOverflowLines()
|
|
{
|
|
if (!HasOverflowLines()) {
|
|
return nullptr;
|
|
}
|
|
FrameLines* prop =
|
|
static_cast<FrameLines*>(Properties().Remove(OverflowLinesProperty()));
|
|
NS_ASSERTION(prop && !prop->mLines.empty() &&
|
|
prop->mLines.front()->mFirstChild == prop->mFrames.FirstChild(),
|
|
"value should always be stored and non-empty when state set");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
return prop;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DestroyOverflowLines()
|
|
{
|
|
NS_ASSERTION(HasOverflowLines(), "huh?");
|
|
FrameLines* prop =
|
|
static_cast<FrameLines*>(Properties().Remove(OverflowLinesProperty()));
|
|
NS_ASSERTION(prop && prop->mLines.empty(),
|
|
"value should always be stored but empty when destroying");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
delete prop;
|
|
}
|
|
|
|
// This takes ownership of aOverflowLines.
|
|
// XXX We should allocate overflowLines from presShell arena!
|
|
void
|
|
nsBlockFrame::SetOverflowLines(FrameLines* aOverflowLines)
|
|
{
|
|
NS_ASSERTION(aOverflowLines, "null lines");
|
|
NS_ASSERTION(!aOverflowLines->mLines.empty(), "empty lines");
|
|
NS_ASSERTION(aOverflowLines->mLines.front()->mFirstChild ==
|
|
aOverflowLines->mFrames.FirstChild(),
|
|
"invalid overflow lines / frames");
|
|
NS_ASSERTION(!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES),
|
|
"Overwriting existing overflow lines");
|
|
|
|
FrameProperties props = Properties();
|
|
// Verify that we won't overwrite an existing overflow list
|
|
NS_ASSERTION(!props.Get(OverflowLinesProperty()), "existing overflow list");
|
|
props.Set(OverflowLinesProperty(), aOverflowLines);
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetOverflowOutOfFlows() const
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList* result =
|
|
GetPropTableFrames(PresContext(), OverflowOutOfFlowsProperty());
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
// This takes ownership of the frames
|
|
void
|
|
nsBlockFrame::SetOverflowOutOfFlows(const nsFrameList& aList,
|
|
nsFrameList* aPropValue)
|
|
{
|
|
NS_PRECONDITION(!!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS) ==
|
|
!!aPropValue, "state does not match value");
|
|
|
|
if (aList.IsEmpty()) {
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return;
|
|
}
|
|
nsFrameList* list =
|
|
RemovePropTableFrames(PresContext(),
|
|
OverflowOutOfFlowsProperty());
|
|
NS_ASSERTION(aPropValue == list, "prop value mismatch");
|
|
delete list;
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
else if (GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS) {
|
|
NS_ASSERTION(aPropValue == GetPropTableFrames(PresContext(),
|
|
OverflowOutOfFlowsProperty()),
|
|
"prop value mismatch");
|
|
*aPropValue = aList;
|
|
}
|
|
else {
|
|
SetPropTableFrames(PresContext(), new nsFrameList(aList),
|
|
OverflowOutOfFlowsProperty());
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
}
|
|
|
|
nsBulletFrame*
|
|
nsBlockFrame::GetInsideBullet() const
|
|
{
|
|
if (!HasInsideBullet()) {
|
|
return nullptr;
|
|
}
|
|
NS_ASSERTION(!HasOutsideBullet(), "invalid bullet state");
|
|
nsBulletFrame* frame =
|
|
static_cast<nsBulletFrame*>(Properties().Get(InsideBulletProperty()));
|
|
NS_ASSERTION(frame && frame->GetType() == nsGkAtoms::bulletFrame,
|
|
"bogus inside bullet frame");
|
|
return frame;
|
|
}
|
|
|
|
nsBulletFrame*
|
|
nsBlockFrame::GetOutsideBullet() const
|
|
{
|
|
nsFrameList* list = GetOutsideBulletList();
|
|
return list ? static_cast<nsBulletFrame*>(list->FirstChild())
|
|
: nullptr;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetOutsideBulletList() const
|
|
{
|
|
if (!HasOutsideBullet()) {
|
|
return nullptr;
|
|
}
|
|
NS_ASSERTION(!HasInsideBullet(), "invalid bullet state");
|
|
nsFrameList* list =
|
|
static_cast<nsFrameList*>(Properties().Get(OutsideBulletProperty()));
|
|
NS_ASSERTION(list && list->GetLength() == 1 &&
|
|
list->FirstChild()->GetType() == nsGkAtoms::bulletFrame,
|
|
"bogus outside bullet list");
|
|
return list;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetPushedFloats() const
|
|
{
|
|
if (!HasPushedFloats()) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList* result =
|
|
static_cast<nsFrameList*>(Properties().Get(PushedFloatProperty()));
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::EnsurePushedFloats()
|
|
{
|
|
nsFrameList *result = GetPushedFloats();
|
|
if (result)
|
|
return result;
|
|
|
|
result = new nsFrameList;
|
|
Properties().Set(PushedFloatProperty(), result);
|
|
AddStateBits(NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
|
|
return result;
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::RemovePushedFloats()
|
|
{
|
|
if (!HasPushedFloats()) {
|
|
return nullptr;
|
|
}
|
|
nsFrameList *result =
|
|
static_cast<nsFrameList*>(Properties().Remove(PushedFloatProperty()));
|
|
RemoveStateBits(NS_BLOCK_HAS_PUSHED_FLOATS);
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame list manipulation routines
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AppendFrames(ChildListID aListID,
|
|
nsFrameList& aFrameList)
|
|
{
|
|
if (aFrameList.IsEmpty()) {
|
|
return NS_OK;
|
|
}
|
|
if (aListID != kPrincipalList) {
|
|
if (kAbsoluteList == aListID) {
|
|
return nsContainerFrame::AppendFrames(aListID, aFrameList);
|
|
}
|
|
else if (kFloatList == aListID) {
|
|
mFloats.AppendFrames(nullptr, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
else {
|
|
NS_ERROR("unexpected child list");
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
}
|
|
|
|
// Find the proper last-child for where the append should go
|
|
nsIFrame* lastKid = mFrames.LastChild();
|
|
NS_ASSERTION((mLines.empty() ? nullptr : mLines.back()->LastChild()) ==
|
|
lastKid, "out-of-sync mLines / mFrames");
|
|
|
|
// Add frames after the last child
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": append ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (lastKid) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, lastKid);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
nsresult rv = AddFrames(aFrameList, lastKid);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
aFrameList.Clear();
|
|
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::InsertFrames(ChildListID aListID,
|
|
nsIFrame* aPrevFrame,
|
|
nsFrameList& aFrameList)
|
|
{
|
|
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
|
|
"inserting after sibling frame with different parent");
|
|
|
|
if (aListID != kPrincipalList) {
|
|
if (kAbsoluteList == aListID) {
|
|
return nsContainerFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
|
|
}
|
|
else if (kFloatList == aListID) {
|
|
mFloats.InsertFrames(this, aPrevFrame, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
#ifdef IBMBIDI
|
|
else if (kNoReflowPrincipalList == aListID) {}
|
|
#endif // IBMBIDI
|
|
else {
|
|
NS_ERROR("unexpected child list");
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
}
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": insert ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (aPrevFrame) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, aPrevFrame);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
nsresult rv = AddFrames(aFrameList, aPrevFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (aListID != kNoReflowPrincipalList)
|
|
#endif // IBMBIDI
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
return NS_OK;
|
|
}
|
|
|
|
static bool
|
|
ShouldPutNextSiblingOnNewLine(nsIFrame* aLastFrame)
|
|
{
|
|
nsIAtom* type = aLastFrame->GetType();
|
|
if (type == nsGkAtoms::brFrame)
|
|
return true;
|
|
if (type == nsGkAtoms::textFrame)
|
|
return aLastFrame->HasTerminalNewline() &&
|
|
aLastFrame->GetStyleText()->NewlineIsSignificant();
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::AddFrames(nsFrameList& aFrameList, nsIFrame* aPrevSibling)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
if (aFrameList.IsEmpty()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// If we're inserting at the beginning of our list and we have an
|
|
// inside bullet, insert after that bullet.
|
|
if (!aPrevSibling && HasInsideBullet()) {
|
|
aPrevSibling = GetInsideBullet();
|
|
}
|
|
|
|
// Attempt to find the line that contains the previous sibling
|
|
FrameLines* overflowLines;
|
|
nsLineList* lineList = &mLines;
|
|
nsLineList::iterator prevSibLine = lineList->end();
|
|
int32_t prevSiblingIndex = -1;
|
|
if (aPrevSibling) {
|
|
// XXX_perf This is technically O(N^2) in some cases, but by using
|
|
// RFind instead of Find, we make it O(N) in the most common case,
|
|
// which is appending content.
|
|
|
|
// Find the line that contains the previous sibling
|
|
if (!nsLineBox::RFindLineContaining(aPrevSibling, lineList->begin(),
|
|
prevSibLine, mFrames.LastChild(),
|
|
&prevSiblingIndex)) {
|
|
// Not in mLines - try overflow lines.
|
|
overflowLines = GetOverflowLines();
|
|
lineList = overflowLines ? &overflowLines->mLines : nullptr;
|
|
if (overflowLines) {
|
|
prevSibLine = overflowLines->mLines.end();
|
|
prevSiblingIndex = -1;
|
|
if (!nsLineBox::RFindLineContaining(aPrevSibling, lineList->begin(),
|
|
prevSibLine,
|
|
overflowLines->mFrames.LastChild(),
|
|
&prevSiblingIndex)) {
|
|
lineList = nullptr;
|
|
}
|
|
}
|
|
if (!lineList) {
|
|
// Note: defensive code! RFindLineContaining must not return
|
|
// false in this case, so if it does...
|
|
NS_NOTREACHED("prev sibling not in line list");
|
|
lineList = &mLines;
|
|
aPrevSibling = nullptr;
|
|
prevSibLine = lineList->end();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Find the frame following aPrevSibling so that we can join up the
|
|
// two lists of frames.
|
|
if (aPrevSibling) {
|
|
// Split line containing aPrevSibling in two if the insertion
|
|
// point is somewhere in the middle of the line.
|
|
int32_t rem = prevSibLine->GetChildCount() - prevSiblingIndex - 1;
|
|
if (rem) {
|
|
// Split the line in two where the frame(s) are being inserted.
|
|
nsLineBox* line = NewLineBox(prevSibLine, aPrevSibling->GetNextSibling(), rem);
|
|
if (!line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
lineList->after_insert(prevSibLine, line);
|
|
// Mark prevSibLine dirty and as needing textrun invalidation, since
|
|
// we may be breaking up text in the line. Its previous line may also
|
|
// need to be invalidated because it may be able to pull some text up.
|
|
MarkLineDirty(prevSibLine, lineList);
|
|
// The new line will also need its textruns recomputed because of the
|
|
// frame changes.
|
|
line->MarkDirty();
|
|
line->SetInvalidateTextRuns(true);
|
|
}
|
|
}
|
|
else if (! lineList->empty()) {
|
|
lineList->front()->MarkDirty();
|
|
lineList->front()->SetInvalidateTextRuns(true);
|
|
}
|
|
nsFrameList& frames = lineList == &mLines ? mFrames : overflowLines->mFrames;
|
|
const nsFrameList::Slice& newFrames =
|
|
frames.InsertFrames(nullptr, aPrevSibling, aFrameList);
|
|
|
|
// Walk through the new frames being added and update the line data
|
|
// structures to fit.
|
|
for (nsFrameList::Enumerator e(newFrames); !e.AtEnd(); e.Next()) {
|
|
nsIFrame* newFrame = e.get();
|
|
NS_ASSERTION(!aPrevSibling || aPrevSibling->GetNextSibling() == newFrame,
|
|
"Unexpected aPrevSibling");
|
|
NS_ASSERTION(newFrame->GetType() != nsGkAtoms::placeholderFrame ||
|
|
(!newFrame->IsAbsolutelyPositioned() &&
|
|
!newFrame->IsFloating()),
|
|
"Placeholders should not float or be positioned");
|
|
|
|
bool isBlock = newFrame->IsBlockOutside();
|
|
|
|
// If the frame is a block frame, or if there is no previous line or if the
|
|
// previous line is a block line we need to make a new line. We also make
|
|
// a new line, as an optimization, in the two cases we know we'll need it:
|
|
// if the previous line ended with a <br>, or if it has significant whitespace
|
|
// and ended in a newline.
|
|
if (isBlock || prevSibLine == lineList->end() || prevSibLine->IsBlock() ||
|
|
(aPrevSibling && ShouldPutNextSiblingOnNewLine(aPrevSibling))) {
|
|
// Create a new line for the frame and add its line to the line
|
|
// list.
|
|
nsLineBox* line = NewLineBox(newFrame, isBlock);
|
|
if (!line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
if (prevSibLine != lineList->end()) {
|
|
// Append new line after prevSibLine
|
|
lineList->after_insert(prevSibLine, line);
|
|
++prevSibLine;
|
|
}
|
|
else {
|
|
// New line is going before the other lines
|
|
lineList->push_front(line);
|
|
prevSibLine = lineList->begin();
|
|
}
|
|
}
|
|
else {
|
|
prevSibLine->NoteFrameAdded(newFrame);
|
|
// We're adding inline content to prevSibLine, so we need to mark it
|
|
// dirty, ensure its textruns are recomputed, and possibly do the same
|
|
// to its previous line since that line may be able to pull content up.
|
|
MarkLineDirty(prevSibLine, lineList);
|
|
}
|
|
|
|
aPrevSibling = newFrame;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
nsBlockFrame::line_iterator
|
|
nsBlockFrame::RemoveFloat(nsIFrame* aFloat) {
|
|
// Find which line contains the float, so we can update
|
|
// the float cache.
|
|
line_iterator line = begin_lines(), line_end = end_lines();
|
|
for ( ; line != line_end; ++line) {
|
|
if (line->IsInline() && line->RemoveFloat(aFloat)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Try to destroy if it's in mFloats.
|
|
if (mFloats.DestroyFrameIfPresent(aFloat)) {
|
|
return line;
|
|
}
|
|
|
|
// Try our overflow list
|
|
{
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.DestroyFrameIfPresent(aFloat)) {
|
|
return line_end;
|
|
}
|
|
}
|
|
|
|
NS_ERROR("Destroying float without removing from a child list.");
|
|
return line_end;
|
|
}
|
|
|
|
static void MarkSameFloatManagerLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsBlockFrame* blockWithFloatMgr = aBlock;
|
|
while (!(blockWithFloatMgr->GetStateBits() & NS_BLOCK_FLOAT_MGR)) {
|
|
nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(blockWithFloatMgr->GetParent());
|
|
if (!bf) {
|
|
break;
|
|
}
|
|
blockWithFloatMgr = bf;
|
|
}
|
|
|
|
// Mark every line at and below the line where the float was
|
|
// dirty, and mark their lines dirty too. We could probably do
|
|
// something more efficient --- e.g., just dirty the lines that intersect
|
|
// the float vertically.
|
|
MarkAllDescendantLinesDirty(blockWithFloatMgr);
|
|
}
|
|
|
|
/**
|
|
* Returns true if aFrame is a block that has one or more float children.
|
|
*/
|
|
static bool BlockHasAnyFloats(nsIFrame* aFrame)
|
|
{
|
|
nsBlockFrame* block = nsLayoutUtils::GetAsBlock(aFrame);
|
|
if (!block)
|
|
return false;
|
|
if (block->GetFirstChild(nsIFrame::kFloatList))
|
|
return true;
|
|
|
|
nsLineList::iterator line = block->begin_lines();
|
|
nsLineList::iterator endLine = block->end_lines();
|
|
while (line != endLine) {
|
|
if (line->IsBlock() && BlockHasAnyFloats(line->mFirstChild))
|
|
return true;
|
|
++line;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::RemoveFrame(ChildListID aListID,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": remove ");
|
|
nsFrame::ListTag(stdout, aOldFrame);
|
|
printf("\n");
|
|
#endif
|
|
|
|
if (aListID == kPrincipalList) {
|
|
bool hasFloats = BlockHasAnyFloats(aOldFrame);
|
|
rv = DoRemoveFrame(aOldFrame, REMOVE_FIXED_CONTINUATIONS);
|
|
if (hasFloats) {
|
|
MarkSameFloatManagerLinesDirty(this);
|
|
}
|
|
}
|
|
else if (kAbsoluteList == aListID) {
|
|
nsContainerFrame::RemoveFrame(aListID, aOldFrame);
|
|
return NS_OK;
|
|
}
|
|
else if (kFloatList == aListID) {
|
|
// Make sure to mark affected lines dirty for the float frame
|
|
// we are removing; this way is a bit messy, but so is the rest of the code.
|
|
// See bug 390762.
|
|
NS_ASSERTION(!aOldFrame->GetPrevContinuation(),
|
|
"RemoveFrame should not be called on pushed floats.");
|
|
for (nsIFrame* f = aOldFrame;
|
|
f && !(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER);
|
|
f = f->GetNextContinuation()) {
|
|
MarkSameFloatManagerLinesDirty(static_cast<nsBlockFrame*>(f->GetParent()));
|
|
}
|
|
DoRemoveOutOfFlowFrame(aOldFrame);
|
|
}
|
|
#ifdef IBMBIDI
|
|
else if (kNoReflowPrincipalList == aListID) {
|
|
// Skip the call to |FrameNeedsReflow| below by returning now.
|
|
return DoRemoveFrame(aOldFrame, REMOVE_FIXED_CONTINUATIONS);
|
|
}
|
|
#endif // IBMBIDI
|
|
else {
|
|
NS_ERROR("unexpected child list");
|
|
rv = NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
PresContext()->PresShell()->
|
|
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
|
|
NS_FRAME_HAS_DIRTY_CHILDREN); // XXX sufficient?
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DoRemoveOutOfFlowFrame(nsIFrame* aFrame)
|
|
{
|
|
// The containing block is always the parent of aFrame.
|
|
nsBlockFrame* block = (nsBlockFrame*)aFrame->GetParent();
|
|
|
|
// Remove aFrame from the appropriate list.
|
|
if (aFrame->IsAbsolutelyPositioned()) {
|
|
// This also deletes the next-in-flows
|
|
block->GetAbsoluteContainingBlock()->RemoveFrame(block,
|
|
kAbsoluteList,
|
|
aFrame);
|
|
}
|
|
else {
|
|
// First remove aFrame's next-in-flows
|
|
nsIFrame* nif = aFrame->GetNextInFlow();
|
|
if (nif) {
|
|
static_cast<nsContainerFrame*>(nif->GetParent())
|
|
->DeleteNextInFlowChild(aFrame->PresContext(), nif, false);
|
|
}
|
|
// Now remove aFrame
|
|
// This also destroys the frame.
|
|
block->RemoveFloat(aFrame);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This helps us iterate over the list of all normal + overflow lines
|
|
*/
|
|
void
|
|
nsBlockFrame::TryAllLines(nsLineList::iterator* aIterator,
|
|
nsLineList::iterator* aStartIterator,
|
|
nsLineList::iterator* aEndIterator,
|
|
bool* aInOverflowLines,
|
|
FrameLines** aOverflowLines)
|
|
{
|
|
if (*aIterator == *aEndIterator) {
|
|
if (!*aInOverflowLines) {
|
|
// Try the overflow lines
|
|
*aInOverflowLines = true;
|
|
FrameLines* lines = GetOverflowLines();
|
|
if (lines) {
|
|
*aStartIterator = lines->mLines.begin();
|
|
*aIterator = *aStartIterator;
|
|
*aEndIterator = lines->mLines.end();
|
|
*aOverflowLines = lines;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
line_iterator aLine)
|
|
: mFrame(aFrame), mLine(aLine), mLineList(&aFrame->mLines)
|
|
{
|
|
// This will assert if aLine isn't in mLines of aFrame:
|
|
DebugOnly<bool> check = aLine == mFrame->begin_lines();
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
line_iterator aLine, bool aInOverflow)
|
|
: mFrame(aFrame), mLine(aLine),
|
|
mLineList(aInOverflow ? &aFrame->GetOverflowLines()->mLines
|
|
: &aFrame->mLines)
|
|
{
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
bool* aFoundValidLine)
|
|
: mFrame(aFrame), mLineList(&aFrame->mLines)
|
|
{
|
|
mLine = aFrame->begin_lines();
|
|
*aFoundValidLine = FindValidLine();
|
|
}
|
|
|
|
static nsIFrame*
|
|
FindChildContaining(nsBlockFrame* aFrame, nsIFrame* aFindFrame)
|
|
{
|
|
NS_ASSERTION(aFrame, "must have frame");
|
|
nsIFrame* child;
|
|
while (true) {
|
|
nsIFrame* block = aFrame;
|
|
do {
|
|
child = nsLayoutUtils::FindChildContainingDescendant(block, aFindFrame);
|
|
if (child)
|
|
break;
|
|
block = block->GetNextContinuation();
|
|
} while (block);
|
|
if (!child)
|
|
return nullptr;
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW))
|
|
break;
|
|
aFindFrame = aFrame->PresContext()->FrameManager()->GetPlaceholderFrameFor(child);
|
|
}
|
|
|
|
return child;
|
|
}
|
|
|
|
nsBlockInFlowLineIterator::nsBlockInFlowLineIterator(nsBlockFrame* aFrame,
|
|
nsIFrame* aFindFrame, bool* aFoundValidLine)
|
|
: mFrame(aFrame), mLineList(&aFrame->mLines)
|
|
{
|
|
*aFoundValidLine = false;
|
|
|
|
nsIFrame* child = FindChildContaining(aFrame, aFindFrame);
|
|
if (!child)
|
|
return;
|
|
|
|
// Try to use the cursor if it exists, otherwise fall back to the first line
|
|
nsLineBox* cursor = aFrame->GetLineCursor();
|
|
if (!cursor) {
|
|
line_iterator iter = aFrame->begin_lines();
|
|
if (iter != aFrame->end_lines()) {
|
|
cursor = iter;
|
|
}
|
|
}
|
|
|
|
if (cursor) {
|
|
// Perform a simultaneous forward and reverse search starting from the
|
|
// line cursor.
|
|
nsBlockFrame::line_iterator line = aFrame->line(cursor);
|
|
nsBlockFrame::reverse_line_iterator rline = aFrame->rline(cursor);
|
|
nsBlockFrame::line_iterator line_end = aFrame->end_lines();
|
|
nsBlockFrame::reverse_line_iterator rline_end = aFrame->rend_lines();
|
|
// rline is positioned on the line containing 'cursor', so it's not
|
|
// rline_end. So we can safely increment it (i.e. move it to one line
|
|
// earlier) to start searching there.
|
|
++rline;
|
|
while (line != line_end || rline != rline_end) {
|
|
if (line != line_end) {
|
|
if (line->Contains(child)) {
|
|
*aFoundValidLine = true;
|
|
mLine = line;
|
|
return;
|
|
}
|
|
++line;
|
|
}
|
|
if (rline != rline_end) {
|
|
if (rline->Contains(child)) {
|
|
*aFoundValidLine = true;
|
|
mLine = rline;
|
|
return;
|
|
}
|
|
++rline;
|
|
}
|
|
}
|
|
// Didn't find the line
|
|
}
|
|
|
|
// If we reach here, it means that we have not been able to find the
|
|
// desired frame in our in-flow lines. So we should start looking at
|
|
// our overflow lines. In order to do that, we set mLine to the end
|
|
// iterator so that FindValidLine starts to look at overflow lines,
|
|
// if any.
|
|
|
|
mLine = aFrame->end_lines();
|
|
|
|
if (!FindValidLine())
|
|
return;
|
|
|
|
do {
|
|
if (mLine->Contains(child)) {
|
|
*aFoundValidLine = true;
|
|
return;
|
|
}
|
|
} while (Next());
|
|
}
|
|
|
|
nsBlockFrame::line_iterator
|
|
nsBlockInFlowLineIterator::End()
|
|
{
|
|
return mLineList->end();
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::IsLastLineInList()
|
|
{
|
|
line_iterator end = End();
|
|
return mLine != end && mLine.next() == end;
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::Next()
|
|
{
|
|
++mLine;
|
|
return FindValidLine();
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::Prev()
|
|
{
|
|
line_iterator begin = mLineList->begin();
|
|
if (mLine != begin) {
|
|
--mLine;
|
|
return true;
|
|
}
|
|
bool currentlyInOverflowLines = GetInOverflow();
|
|
while (true) {
|
|
if (currentlyInOverflowLines) {
|
|
mLineList = &mFrame->mLines;
|
|
mLine = mLineList->end();
|
|
if (mLine != mLineList->begin()) {
|
|
--mLine;
|
|
return true;
|
|
}
|
|
} else {
|
|
mFrame = static_cast<nsBlockFrame*>(mFrame->GetPrevInFlow());
|
|
if (!mFrame)
|
|
return false;
|
|
nsBlockFrame::FrameLines* overflowLines = mFrame->GetOverflowLines();
|
|
if (overflowLines) {
|
|
mLineList = &overflowLines->mLines;
|
|
mLine = mLineList->end();
|
|
NS_ASSERTION(mLine != mLineList->begin(), "empty overflow line list?");
|
|
--mLine;
|
|
return true;
|
|
}
|
|
}
|
|
currentlyInOverflowLines = !currentlyInOverflowLines;
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsBlockInFlowLineIterator::FindValidLine()
|
|
{
|
|
line_iterator end = mLineList->end();
|
|
if (mLine != end)
|
|
return true;
|
|
bool currentlyInOverflowLines = GetInOverflow();
|
|
while (true) {
|
|
if (currentlyInOverflowLines) {
|
|
mFrame = static_cast<nsBlockFrame*>(mFrame->GetNextInFlow());
|
|
if (!mFrame)
|
|
return false;
|
|
mLineList = &mFrame->mLines;
|
|
mLine = mLineList->begin();
|
|
if (mLine != mLineList->end())
|
|
return true;
|
|
} else {
|
|
nsBlockFrame::FrameLines* overflowLines = mFrame->GetOverflowLines();
|
|
if (overflowLines) {
|
|
mLineList = &overflowLines->mLines;
|
|
mLine = mLineList->begin();
|
|
NS_ASSERTION(mLine != mLineList->end(), "empty overflow line list?");
|
|
return true;
|
|
}
|
|
}
|
|
currentlyInOverflowLines = !currentlyInOverflowLines;
|
|
}
|
|
}
|
|
|
|
static nsresult RemoveBlockChild(nsIFrame* aFrame,
|
|
bool aRemoveOnlyFluidContinuations)
|
|
{
|
|
if (!aFrame)
|
|
return NS_OK;
|
|
|
|
nsBlockFrame* nextBlock = nsLayoutUtils::GetAsBlock(aFrame->GetParent());
|
|
NS_ASSERTION(nextBlock,
|
|
"Our child's continuation's parent is not a block?");
|
|
return nextBlock->DoRemoveFrame(aFrame,
|
|
(aRemoveOnlyFluidContinuations ? 0 : nsBlockFrame::REMOVE_FIXED_CONTINUATIONS));
|
|
}
|
|
|
|
// This function removes aDeletedFrame and all its continuations. It
|
|
// is optimized for deleting a whole series of frames. The easy
|
|
// implementation would invoke itself recursively on
|
|
// aDeletedFrame->GetNextContinuation, then locate the line containing
|
|
// aDeletedFrame and remove aDeletedFrame from that line. But here we
|
|
// start by locating aDeletedFrame and then scanning from that point
|
|
// on looking for continuations.
|
|
nsresult
|
|
nsBlockFrame::DoRemoveFrame(nsIFrame* aDeletedFrame, uint32_t aFlags)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
if (aDeletedFrame->GetStateBits() &
|
|
(NS_FRAME_OUT_OF_FLOW | NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
if (!aDeletedFrame->GetPrevInFlow()) {
|
|
NS_ASSERTION(aDeletedFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"Expected out-of-flow frame");
|
|
DoRemoveOutOfFlowFrame(aDeletedFrame);
|
|
}
|
|
else {
|
|
nsContainerFrame::DeleteNextInFlowChild(presContext, aDeletedFrame,
|
|
(aFlags & FRAMES_ARE_EMPTY) != 0);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
// Find the line that contains deletedFrame
|
|
nsLineList::iterator line_start = mLines.begin(),
|
|
line_end = mLines.end();
|
|
nsLineList::iterator line = line_start;
|
|
FrameLines* overflowLines = nullptr;
|
|
bool searchingOverflowList = false;
|
|
// Make sure we look in the overflow lines even if the normal line
|
|
// list is empty
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
while (line != line_end) {
|
|
if (line->Contains(aDeletedFrame)) {
|
|
break;
|
|
}
|
|
++line;
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
}
|
|
|
|
if (line == line_end) {
|
|
NS_ERROR("can't find deleted frame in lines");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY)) {
|
|
if (line != line_start) {
|
|
line.prev()->MarkDirty();
|
|
line.prev()->SetInvalidateTextRuns(true);
|
|
}
|
|
else if (searchingOverflowList && !mLines.empty()) {
|
|
mLines.back()->MarkDirty();
|
|
mLines.back()->SetInvalidateTextRuns(true);
|
|
}
|
|
}
|
|
|
|
while (line != line_end && aDeletedFrame) {
|
|
NS_ASSERTION(this == aDeletedFrame->GetParent(), "messed up delete code");
|
|
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY)) {
|
|
line->MarkDirty();
|
|
line->SetInvalidateTextRuns(true);
|
|
}
|
|
|
|
// If the frame being deleted is the last one on the line then
|
|
// optimize away the line->Contains(next-in-flow) call below.
|
|
bool isLastFrameOnLine = 1 == line->GetChildCount();
|
|
if (!isLastFrameOnLine) {
|
|
line_iterator next = line.next();
|
|
nsIFrame* lastFrame = next != line_end ?
|
|
next->mFirstChild->GetPrevSibling() :
|
|
(searchingOverflowList ? overflowLines->mFrames.LastChild() :
|
|
mFrames.LastChild());
|
|
NS_ASSERTION(next == line_end || lastFrame == line->LastChild(),
|
|
"unexpected line frames");
|
|
isLastFrameOnLine = lastFrame == aDeletedFrame;
|
|
}
|
|
|
|
// Remove aDeletedFrame from the line
|
|
if (line->mFirstChild == aDeletedFrame) {
|
|
// We should be setting this to null if aDeletedFrame
|
|
// is the only frame on the line. HOWEVER in that case
|
|
// we will be removing the line anyway, see below.
|
|
line->mFirstChild = aDeletedFrame->GetNextSibling();
|
|
}
|
|
|
|
// Hmm, this won't do anything if we're removing a frame in the first
|
|
// overflow line... Hopefully doesn't matter
|
|
--line;
|
|
if (line != line_end && !line->IsBlock()) {
|
|
// Since we just removed a frame that follows some inline
|
|
// frames, we need to reflow the previous line.
|
|
line->MarkDirty();
|
|
}
|
|
++line;
|
|
|
|
// Take aDeletedFrame out of the sibling list. Note that
|
|
// prevSibling will only be nullptr when we are deleting the very
|
|
// first frame in the main or overflow list.
|
|
if (searchingOverflowList) {
|
|
overflowLines->mFrames.RemoveFrame(aDeletedFrame);
|
|
} else {
|
|
mFrames.RemoveFrame(aDeletedFrame);
|
|
}
|
|
|
|
// Update the child count of the line to be accurate
|
|
line->NoteFrameRemoved(aDeletedFrame);
|
|
|
|
// Destroy frame; capture its next continuation first in case we need
|
|
// to destroy that too.
|
|
nsIFrame* deletedNextContinuation = (aFlags & REMOVE_FIXED_CONTINUATIONS) ?
|
|
aDeletedFrame->GetNextContinuation() : aDeletedFrame->GetNextInFlow();
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p frame=",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
nsFrame::ListTag(stdout, aDeletedFrame);
|
|
printf(" prevSibling=%p deletedNextContinuation=%p\n",
|
|
aDeletedFrame->GetPrevSibling(), deletedNextContinuation);
|
|
#endif
|
|
|
|
// If next-in-flow is an overflow container, must remove it first.
|
|
if (deletedNextContinuation &&
|
|
deletedNextContinuation->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
|
|
static_cast<nsContainerFrame*>(deletedNextContinuation->GetParent())
|
|
->DeleteNextInFlowChild(presContext, deletedNextContinuation, false);
|
|
deletedNextContinuation = nullptr;
|
|
}
|
|
|
|
aDeletedFrame->Destroy();
|
|
aDeletedFrame = deletedNextContinuation;
|
|
|
|
bool haveAdvancedToNextLine = false;
|
|
// If line is empty, remove it now.
|
|
if (0 == line->GetChildCount()) {
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p became empty so it will be removed\n",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
#endif
|
|
nsLineBox *cur = line;
|
|
if (!searchingOverflowList) {
|
|
line = mLines.erase(line);
|
|
// Invalidate the space taken up by the line.
|
|
// XXX We need to do this if we're removing a frame as a result of
|
|
// a call to RemoveFrame(), but we may not need to do this in all
|
|
// cases...
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
nsRect visOverflow(cur->GetVisualOverflowArea());
|
|
printf("%p invalidate 10 (%d, %d, %d, %d)\n",
|
|
this, visOverflow.x, visOverflow.y,
|
|
visOverflow.width, visOverflow.height);
|
|
#endif
|
|
} else {
|
|
// XXX update searchingOverflowList directly, remove only when empty
|
|
FrameLines* overflowLines = RemoveOverflowLines();
|
|
line = overflowLines->mLines.erase(line);
|
|
if (!overflowLines->mLines.empty()) {
|
|
SetOverflowLines(overflowLines);
|
|
} else {
|
|
delete overflowLines;
|
|
// We just invalidated our iterators. Since we were in
|
|
// the overflow lines list, which is now empty, set them
|
|
// so we're at the end of the regular line list.
|
|
line_start = mLines.begin();
|
|
line_end = mLines.end();
|
|
line = line_end;
|
|
}
|
|
}
|
|
FreeLineBox(cur);
|
|
|
|
// If we're removing a line, ReflowDirtyLines isn't going to
|
|
// know that it needs to slide lines unless something is marked
|
|
// dirty. So mark the previous margin of the next line dirty if
|
|
// there is one.
|
|
if (line != line_end) {
|
|
line->MarkPreviousMarginDirty();
|
|
}
|
|
haveAdvancedToNextLine = true;
|
|
} else {
|
|
// Make the line that just lost a frame dirty, and advance to
|
|
// the next line.
|
|
if (!deletedNextContinuation || isLastFrameOnLine ||
|
|
!line->Contains(deletedNextContinuation)) {
|
|
line->MarkDirty();
|
|
++line;
|
|
haveAdvancedToNextLine = true;
|
|
}
|
|
}
|
|
|
|
if (deletedNextContinuation) {
|
|
// See if we should keep looking in the current flow's line list.
|
|
if (deletedNextContinuation->GetParent() != this) {
|
|
// The deceased frames continuation is not a child of the
|
|
// current block. So break out of the loop so that we advance
|
|
// to the next parent.
|
|
//
|
|
// If we have a continuation in a different block then all bets are
|
|
// off regarding whether we are deleting frames without actual content,
|
|
// so don't propagate FRAMES_ARE_EMPTY any further.
|
|
aFlags &= ~FRAMES_ARE_EMPTY;
|
|
break;
|
|
}
|
|
|
|
// If we advanced to the next line then check if we should switch to the
|
|
// overflow line list.
|
|
if (haveAdvancedToNextLine) {
|
|
if (line != line_end && !searchingOverflowList &&
|
|
!line->Contains(deletedNextContinuation)) {
|
|
// We have advanced to the next *normal* line but the next-in-flow
|
|
// is not there - force a switch to the overflow line list.
|
|
line = line_end;
|
|
}
|
|
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: now on %s line=%p\n",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(aFlags & FRAMES_ARE_EMPTY) && line.next() != line_end) {
|
|
line.next()->MarkDirty();
|
|
line.next()->SetInvalidateTextRuns(true);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(true);
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
|
|
// Advance to next flow block if the frame has more continuations
|
|
return RemoveBlockChild(aDeletedFrame, !(aFlags & REMOVE_FIXED_CONTINUATIONS));
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::StealFrame(nsPresContext* aPresContext,
|
|
nsIFrame* aChild,
|
|
bool aForceNormal)
|
|
{
|
|
NS_PRECONDITION(aPresContext && aChild, "null pointer");
|
|
|
|
if ((aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
|
|
aChild->IsFloating()) {
|
|
bool removed = mFloats.RemoveFrameIfPresent(aChild);
|
|
if (!removed) {
|
|
nsFrameList* list = GetPushedFloats();
|
|
if (list) {
|
|
removed = list->RemoveFrameIfPresent(aChild);
|
|
}
|
|
}
|
|
return removed ? NS_OK : NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
if ((aChild->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)
|
|
&& !aForceNormal)
|
|
return nsContainerFrame::StealFrame(aPresContext, aChild);
|
|
|
|
// Find the line and the previous sibling that contains
|
|
// aChild; we also find the pointer to the line.
|
|
nsLineList::iterator line = mLines.begin(),
|
|
line_start = line,
|
|
line_end = mLines.end();
|
|
bool searchingOverflowList = false;
|
|
FrameLines* overflowLines = nullptr;
|
|
nsIFrame* prevSibling = nullptr;
|
|
// Make sure we look in the overflow lines even if the normal line
|
|
// list is empty
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
while (line != line_end) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
int32_t n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (frame == aChild) {
|
|
if (frame == line->mFirstChild) {
|
|
line->mFirstChild = frame->GetNextSibling();
|
|
}
|
|
if (searchingOverflowList) {
|
|
overflowLines->mFrames.RemoveFrame(frame);
|
|
} else {
|
|
mFrames.RemoveFrame(frame);
|
|
}
|
|
|
|
// Register removal with the line boxes
|
|
line->NoteFrameRemoved(frame);
|
|
if (line->GetChildCount() > 0) {
|
|
line->MarkDirty();
|
|
} else {
|
|
// Remove the line box
|
|
nsLineBox* lineBox = line;
|
|
if (searchingOverflowList) {
|
|
// Erase line, but avoid making the overflow line list empty
|
|
// XXX update overflowLines directly, remove only when empty
|
|
RemoveOverflowLines();
|
|
line = overflowLines->mLines.erase(line);
|
|
if (!overflowLines->mLines.empty()) {
|
|
SetOverflowLines(overflowLines);
|
|
} else {
|
|
delete overflowLines;
|
|
// We just invalidated our iterators. Since we were in
|
|
// the overflow lines list, which is now empty, set them
|
|
// so we're at the end of the regular line list.
|
|
line_start = mLines.begin();
|
|
line_end = mLines.end();
|
|
line = line_end;
|
|
}
|
|
} else {
|
|
line = mLines.erase(line);
|
|
}
|
|
FreeLineBox(lineBox);
|
|
if (line != line_end) {
|
|
// Line disappeared, so tell next line it may have to change position
|
|
line->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
// Ok, we're done
|
|
return NS_OK;
|
|
}
|
|
prevSibling = frame;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
++line;
|
|
TryAllLines(&line, &line_start, &line_end, &searchingOverflowList,
|
|
&overflowLines);
|
|
if (prevSibling && !prevSibling->GetNextSibling()) {
|
|
// We just switched to the overflow list. Null out prevSibling
|
|
prevSibling = nullptr;
|
|
}
|
|
}
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteNextInFlowChild(nsPresContext* aPresContext,
|
|
nsIFrame* aNextInFlow,
|
|
bool aDeletingEmptyFrames)
|
|
{
|
|
NS_PRECONDITION(aNextInFlow->GetPrevInFlow(), "bad next-in-flow");
|
|
|
|
if (aNextInFlow->GetStateBits() &
|
|
(NS_FRAME_OUT_OF_FLOW | NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
nsContainerFrame::DeleteNextInFlowChild(aPresContext,
|
|
aNextInFlow, aDeletingEmptyFrames);
|
|
}
|
|
else {
|
|
#ifdef DEBUG
|
|
if (aDeletingEmptyFrames) {
|
|
nsLayoutUtils::AssertTreeOnlyEmptyNextInFlows(aNextInFlow);
|
|
}
|
|
#endif
|
|
DoRemoveFrame(aNextInFlow,
|
|
aDeletingEmptyFrames ? FRAMES_ARE_EMPTY : 0);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// Float support
|
|
|
|
nsRect
|
|
nsBlockFrame::AdjustFloatAvailableSpace(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloatFrame)
|
|
{
|
|
// Compute the available width. By default, assume the width of the
|
|
// containing block.
|
|
nscoord availWidth;
|
|
const nsStyleDisplay* floatDisplay = aFloatFrame->GetStyleDisplay();
|
|
|
|
if (NS_STYLE_DISPLAY_TABLE != floatDisplay->mDisplay ||
|
|
eCompatibility_NavQuirks != aState.mPresContext->CompatibilityMode() ) {
|
|
availWidth = aState.mContentArea.width;
|
|
}
|
|
else {
|
|
// This quirk matches the one in nsBlockReflowState::FlowAndPlaceFloat
|
|
// give tables only the available space
|
|
// if they can shrink we may not be constrained to place
|
|
// them in the next line
|
|
availWidth = aFloatAvailableSpace.width;
|
|
}
|
|
|
|
nscoord availHeight = NS_UNCONSTRAINEDSIZE == aState.mContentArea.height
|
|
? NS_UNCONSTRAINEDSIZE
|
|
: NS_MAX(0, aState.mContentArea.YMost() - aState.mY);
|
|
|
|
#ifdef DISABLE_FLOAT_BREAKING_IN_COLUMNS
|
|
if (availHeight != NS_UNCONSTRAINEDSIZE &&
|
|
nsLayoutUtils::GetClosestFrameOfType(this, nsGkAtoms::columnSetFrame)) {
|
|
// Tell the float it has unrestricted height, so it won't break.
|
|
// If the float doesn't actually fit in the column it will fail to be
|
|
// placed, and either move to the top of the next column or just
|
|
// overflow.
|
|
availHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
#endif
|
|
|
|
return nsRect(aState.mContentArea.x,
|
|
aState.mContentArea.y,
|
|
availWidth, availHeight);
|
|
}
|
|
|
|
nscoord
|
|
nsBlockFrame::ComputeFloatWidth(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFloat)
|
|
{
|
|
NS_PRECONDITION(aFloat->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"aFloat must be an out-of-flow frame");
|
|
// Reflow the float.
|
|
nsRect availSpace = AdjustFloatAvailableSpace(aState, aFloatAvailableSpace,
|
|
aFloat);
|
|
|
|
nsHTMLReflowState floatRS(aState.mPresContext, aState.mReflowState, aFloat,
|
|
nsSize(availSpace.width, availSpace.height));
|
|
return floatRS.ComputedWidth() + floatRS.mComputedBorderPadding.LeftRight() +
|
|
floatRS.mComputedMargin.LeftRight();
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowFloat(nsBlockReflowState& aState,
|
|
const nsRect& aAdjustedAvailableSpace,
|
|
nsIFrame* aFloat,
|
|
nsMargin& aFloatMargin,
|
|
bool aFloatPushedDown,
|
|
nsReflowStatus& aReflowStatus)
|
|
{
|
|
NS_PRECONDITION(aFloat->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"aFloat must be an out-of-flow frame");
|
|
// Reflow the float.
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
|
|
#ifdef NOISY_FLOAT
|
|
printf("Reflow Float %p in parent %p, availSpace(%d,%d,%d,%d)\n",
|
|
aFloat, this,
|
|
aFloatAvailableSpace.x, aFloatAvailableSpace.y,
|
|
aFloatAvailableSpace.width, aFloatAvailableSpace.height
|
|
);
|
|
#endif
|
|
|
|
nsHTMLReflowState floatRS(aState.mPresContext, aState.mReflowState, aFloat,
|
|
nsSize(aAdjustedAvailableSpace.width,
|
|
aAdjustedAvailableSpace.height));
|
|
|
|
// Normally the mIsTopOfPage state is copied from the parent reflow
|
|
// state. However, when reflowing a float, if we've placed other
|
|
// floats that force this float *down* or *narrower*, we should unset
|
|
// the mIsTopOfPage state.
|
|
// FIXME: This is somewhat redundant with the |isAdjacentWithTop|
|
|
// variable below, which has the exact same effect. Perhaps it should
|
|
// be merged into that, except that the test for narrowing here is not
|
|
// about adjacency with the top, so it seems misleading.
|
|
if (floatRS.mFlags.mIsTopOfPage &&
|
|
(aFloatPushedDown ||
|
|
aAdjustedAvailableSpace.width != aState.mContentArea.width)) {
|
|
floatRS.mFlags.mIsTopOfPage = false;
|
|
}
|
|
|
|
// Setup a block reflow context to reflow the float.
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState);
|
|
|
|
// Reflow the float
|
|
bool isAdjacentWithTop = aState.IsAdjacentWithTop();
|
|
|
|
nsIFrame* clearanceFrame = nullptr;
|
|
nsresult rv;
|
|
do {
|
|
nsCollapsingMargin margin;
|
|
bool mayNeedRetry = false;
|
|
floatRS.mDiscoveredClearance = nullptr;
|
|
// Only first in flow gets a top margin.
|
|
if (!aFloat->GetPrevInFlow()) {
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(floatRS, &margin,
|
|
clearanceFrame, &mayNeedRetry);
|
|
|
|
if (mayNeedRetry && !clearanceFrame) {
|
|
floatRS.mDiscoveredClearance = &clearanceFrame;
|
|
// We don't need to push the float manager state because the the block has its own
|
|
// float manager that will be destroyed and recreated
|
|
}
|
|
}
|
|
|
|
rv = brc.ReflowBlock(aAdjustedAvailableSpace, true, margin,
|
|
0, isAdjacentWithTop,
|
|
nullptr, floatRS,
|
|
aReflowStatus, aState);
|
|
} while (NS_SUCCEEDED(rv) && clearanceFrame);
|
|
|
|
// An incomplete reflow status means we should split the float
|
|
// if the height is constrained (bug 145305).
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus) &&
|
|
(NS_UNCONSTRAINEDSIZE == aAdjustedAvailableSpace.height))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
|
|
if (aReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
if (aFloat->GetType() == nsGkAtoms::letterFrame) {
|
|
// We never split floating first letters; an incomplete state for
|
|
// such frames simply means that there is more content to be
|
|
// reflowed on the line.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Capture the margin information for the caller
|
|
aFloatMargin = floatRS.mComputedMargin; // float margins don't collapse
|
|
|
|
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
|
|
|
|
// Set the rect, make sure the view is properly sized and positioned,
|
|
// and tell the frame we're done reflowing it
|
|
// XXXldb This seems like the wrong place to be doing this -- shouldn't
|
|
// we be doing this in nsBlockReflowState::FlowAndPlaceFloat after
|
|
// we've positioned the float, and shouldn't we be doing the equivalent
|
|
// of |::PlaceFrameView| here?
|
|
aFloat->SetSize(nsSize(metrics.width, metrics.height));
|
|
if (aFloat->HasView()) {
|
|
nsContainerFrame::SyncFrameViewAfterReflow(aState.mPresContext, aFloat,
|
|
aFloat->GetView(),
|
|
metrics.VisualOverflow(),
|
|
NS_FRAME_NO_MOVE_VIEW);
|
|
}
|
|
// Pass floatRS so the frame hierarchy can be used (redoFloatRS has the same hierarchy)
|
|
aFloat->DidReflow(aState.mPresContext, &floatRS,
|
|
NS_FRAME_REFLOW_FINISHED);
|
|
|
|
#ifdef NOISY_FLOAT
|
|
printf("end ReflowFloat %p, sized to %d,%d\n",
|
|
aFloat, metrics.width, metrics.height);
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
uint8_t
|
|
nsBlockFrame::FindTrailingClear()
|
|
{
|
|
// find the break type of the last line
|
|
for (nsIFrame* b = this; b; b = b->GetPrevInFlow()) {
|
|
nsBlockFrame* block = static_cast<nsBlockFrame*>(b);
|
|
line_iterator endLine = block->end_lines();
|
|
if (endLine != block->begin_lines()) {
|
|
--endLine;
|
|
return endLine->GetBreakTypeAfter();
|
|
}
|
|
}
|
|
return NS_STYLE_CLEAR_NONE;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowPushedFloats(nsBlockReflowState& aState,
|
|
nsOverflowAreas& aOverflowAreas,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
for (nsIFrame* f = mFloats.FirstChild(), *next;
|
|
f && (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT);
|
|
f = next) {
|
|
// save next sibling now, since reflowing could push the entire
|
|
// float, changing its siblings
|
|
next = f->GetNextSibling();
|
|
|
|
// When we push a first-continuation float in a non-initial reflow,
|
|
// it's possible that we end up with two continuations with the same
|
|
// parent. This happens if, on the previous reflow of the block or
|
|
// a previous reflow of the line containing the block, the float was
|
|
// split between continuations A and B of the parent, but on the
|
|
// current reflow, none of the float can fit in A.
|
|
//
|
|
// When this happens, we might even have the two continuations
|
|
// out-of-order due to the management of the pushed floats. In
|
|
// particular, if the float's placeholder was in a pushed line that
|
|
// we reflowed before it was pushed, and we split the float during
|
|
// that reflow, we might have the continuation of the float before
|
|
// the float itself. (In the general case, however, it's correct
|
|
// for floats in the pushed floats list to come before floats
|
|
// anchored in pushed lines; however, in this case it's wrong. We
|
|
// should probably find a way to fix it somehow, since it leads to
|
|
// incorrect layout in some cases.)
|
|
//
|
|
// When we have these out-of-order continuations, we might hit the
|
|
// next-continuation before the previous-continuation. When that
|
|
// happens, just push it. When we reflow the next continuation,
|
|
// we'll either pull all of its content back and destroy it (by
|
|
// calling DeleteNextInFlowChild), or nsBlockFrame::SplitFloat will
|
|
// pull it out of its current position and push it again (and
|
|
// potentially repeat this cycle for the next continuation, although
|
|
// hopefully then they'll be in the right order).
|
|
//
|
|
// We should also need this code for the in-order case if the first
|
|
// continuation of a float gets moved across more than one
|
|
// continuation of the containing block. In this case we'd manage
|
|
// to push the second continuation without this check, but not the
|
|
// third and later.
|
|
nsIFrame *prevContinuation = f->GetPrevContinuation();
|
|
if (prevContinuation && prevContinuation->GetParent() == f->GetParent()) {
|
|
mFloats.RemoveFrame(f);
|
|
aState.AppendPushedFloat(f);
|
|
continue;
|
|
}
|
|
|
|
if (NS_SUBTREE_DIRTY(f) || aState.mReflowState.ShouldReflowAllKids()) {
|
|
// Reflow
|
|
aState.FlowAndPlaceFloat(f);
|
|
}
|
|
else {
|
|
// Just reload the float region into the space manager
|
|
nsRect region = nsFloatManager::GetRegionFor(f);
|
|
aState.mFloatManager->AddFloat(f, region);
|
|
if (f->GetNextInFlow())
|
|
NS_MergeReflowStatusInto(&aStatus, NS_FRAME_OVERFLOW_INCOMPLETE);
|
|
}
|
|
|
|
ConsiderChildOverflow(aOverflowAreas, f);
|
|
}
|
|
|
|
// If there are continued floats, then we may need to continue BR clearance
|
|
if (0 != aState.ClearFloats(0, NS_STYLE_CLEAR_LEFT_AND_RIGHT)) {
|
|
aState.mFloatBreakType = static_cast<nsBlockFrame*>(GetPrevInFlow())
|
|
->FindTrailingClear();
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RecoverFloats(nsFloatManager& aFloatManager)
|
|
{
|
|
// Recover our own floats
|
|
nsIFrame* stop = nullptr; // Stop before we reach pushed floats that
|
|
// belong to our next-in-flow
|
|
for (nsIFrame* f = mFloats.FirstChild(); f && f != stop; f = f->GetNextSibling()) {
|
|
nsRect region = nsFloatManager::GetRegionFor(f);
|
|
aFloatManager.AddFloat(f, region);
|
|
if (!stop && f->GetNextInFlow())
|
|
stop = f->GetNextInFlow();
|
|
}
|
|
|
|
// Recurse into our overflow container children
|
|
for (nsIFrame* oc = GetFirstChild(kOverflowContainersList);
|
|
oc; oc = oc->GetNextSibling()) {
|
|
RecoverFloatsFor(oc, aFloatManager);
|
|
}
|
|
|
|
// Recurse into our normal children
|
|
for (nsBlockFrame::line_iterator line = begin_lines(); line != end_lines(); ++line) {
|
|
if (line->IsBlock()) {
|
|
RecoverFloatsFor(line->mFirstChild, aFloatManager);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RecoverFloatsFor(nsIFrame* aFrame,
|
|
nsFloatManager& aFloatManager)
|
|
{
|
|
NS_PRECONDITION(aFrame, "null frame");
|
|
// Only blocks have floats
|
|
nsBlockFrame* block = nsLayoutUtils::GetAsBlock(aFrame);
|
|
// Don't recover any state inside a block that has its own space manager
|
|
// (we don't currently have any blocks like this, though, thanks to our
|
|
// use of extra frames for 'overflow')
|
|
if (block && !nsBlockFrame::BlockNeedsFloatManager(block)) {
|
|
// If the element is relatively positioned, then adjust x and y
|
|
// accordingly so that we consider relatively positioned frames
|
|
// at their original position.
|
|
nsPoint pos = block->GetPosition() - block->GetRelativeOffset();
|
|
aFloatManager.Translate(pos.x, pos.y);
|
|
block->RecoverFloats(aFloatManager);
|
|
aFloatManager.Translate(-pos.x, -pos.y);
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Painting, event handling
|
|
|
|
int
|
|
nsBlockFrame::GetSkipSides() const
|
|
{
|
|
if (IS_TRUE_OVERFLOW_CONTAINER(this))
|
|
return (1 << NS_SIDE_TOP) | (1 << NS_SIDE_BOTTOM);
|
|
|
|
int skip = 0;
|
|
if (GetPrevInFlow()) {
|
|
skip |= 1 << NS_SIDE_TOP;
|
|
}
|
|
nsIFrame* nif = GetNextInFlow();
|
|
if (nif && !IS_TRUE_OVERFLOW_CONTAINER(nif)) {
|
|
skip |= 1 << NS_SIDE_BOTTOM;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void ComputeVisualOverflowArea(nsLineList& aLines,
|
|
nscoord aWidth, nscoord aHeight,
|
|
nsRect& aResult)
|
|
{
|
|
nscoord xa = 0, ya = 0, xb = aWidth, yb = aHeight;
|
|
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
|
|
line != line_end;
|
|
++line) {
|
|
// Compute min and max x/y values for the reflowed frame's
|
|
// combined areas
|
|
nsRect visOverflow(line->GetVisualOverflowArea());
|
|
nscoord x = visOverflow.x;
|
|
nscoord y = visOverflow.y;
|
|
nscoord xmost = x + visOverflow.width;
|
|
nscoord ymost = y + visOverflow.height;
|
|
if (x < xa) {
|
|
xa = x;
|
|
}
|
|
if (xmost > xb) {
|
|
xb = xmost;
|
|
}
|
|
if (y < ya) {
|
|
ya = y;
|
|
}
|
|
if (ymost > yb) {
|
|
yb = ymost;
|
|
}
|
|
}
|
|
|
|
aResult.x = xa;
|
|
aResult.y = ya;
|
|
aResult.width = xb - xa;
|
|
aResult.height = yb - ya;
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
nsBlockFrame::IsVisibleInSelection(nsISelection* aSelection)
|
|
{
|
|
nsCOMPtr<nsIDOMHTMLHtmlElement> html(do_QueryInterface(mContent));
|
|
nsCOMPtr<nsIDOMHTMLBodyElement> body(do_QueryInterface(mContent));
|
|
if (html || body)
|
|
return true;
|
|
|
|
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
|
|
bool visible;
|
|
nsresult rv = aSelection->ContainsNode(node, true, &visible);
|
|
return NS_SUCCEEDED(rv) && visible;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void DebugOutputDrawLine(int32_t aDepth, nsLineBox* aLine, bool aDrawn) {
|
|
if (nsBlockFrame::gNoisyDamageRepair) {
|
|
nsFrame::IndentBy(stdout, aDepth+1);
|
|
nsRect lineArea = aLine->GetVisualOverflowArea();
|
|
printf("%s line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
aDrawn ? "draw" : "skip",
|
|
static_cast<void*>(aLine),
|
|
aLine->mBounds.x, aLine->mBounds.y,
|
|
aLine->mBounds.width, aLine->mBounds.height,
|
|
lineArea.x, lineArea.y,
|
|
lineArea.width, lineArea.height);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static nsresult
|
|
DisplayLine(nsDisplayListBuilder* aBuilder, const nsRect& aLineArea,
|
|
const nsRect& aDirtyRect, nsBlockFrame::line_iterator& aLine,
|
|
int32_t aDepth, int32_t& aDrawnLines, const nsDisplayListSet& aLists,
|
|
nsBlockFrame* aFrame, TextOverflow* aTextOverflow) {
|
|
// If the line's combined area (which includes child frames that
|
|
// stick outside of the line's bounding box or our bounding box)
|
|
// intersects the dirty rect then paint the line.
|
|
bool intersect = aLineArea.Intersects(aDirtyRect);
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gLamePaintMetrics) {
|
|
aDrawnLines++;
|
|
}
|
|
DebugOutputDrawLine(aDepth, aLine.get(), intersect);
|
|
#endif
|
|
// The line might contain a placeholder for a visible out-of-flow, in which
|
|
// case we need to descend into it. If there is such a placeholder, we will
|
|
// have NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO set.
|
|
// In particular, we really want to check ShouldDescendIntoFrame()
|
|
// on all the frames on the line, but that might be expensive. So
|
|
// we approximate it by checking it on aFrame; if it's true for any
|
|
// frame in the line, it's also true for aFrame.
|
|
bool lineInline = aLine->IsInline();
|
|
bool lineMayHaveTextOverflow = aTextOverflow && lineInline;
|
|
if (!intersect && !aBuilder->ShouldDescendIntoFrame(aFrame) &&
|
|
!lineMayHaveTextOverflow)
|
|
return NS_OK;
|
|
|
|
nsDisplayListCollection collection;
|
|
nsresult rv;
|
|
|
|
// Block-level child backgrounds go on the blockBorderBackgrounds list ...
|
|
// Inline-level child backgrounds go on the regular child content list.
|
|
nsDisplayListSet childLists(collection,
|
|
lineInline ? collection.Content() : collection.BlockBorderBackgrounds());
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
int32_t n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
rv = aFrame->BuildDisplayListForChild(aBuilder, kid, aDirtyRect, childLists,
|
|
lineInline ? nsIFrame::DISPLAY_CHILD_INLINE : 0);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
|
|
if (lineMayHaveTextOverflow) {
|
|
aTextOverflow->ProcessLine(collection, aLine.get());
|
|
}
|
|
|
|
collection.MoveTo(aLists);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists)
|
|
{
|
|
int32_t drawnLines; // Will only be used if set (gLamePaintMetrics).
|
|
int32_t depth = 0;
|
|
#ifdef DEBUG
|
|
if (gNoisyDamageRepair) {
|
|
depth = GetDepth();
|
|
nsRect ca;
|
|
::ComputeVisualOverflowArea(mLines, mRect.width, mRect.height, ca);
|
|
nsFrame::IndentBy(stdout, depth);
|
|
ListTag(stdout);
|
|
printf(": bounds=%d,%d,%d,%d dirty(absolute)=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
mRect.x, mRect.y, mRect.width, mRect.height,
|
|
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height,
|
|
ca.x, ca.y, ca.width, ca.height);
|
|
}
|
|
PRTime start = LL_ZERO; // Initialize these variables to silence the compiler.
|
|
if (gLamePaintMetrics) {
|
|
start = PR_Now();
|
|
drawnLines = 0;
|
|
}
|
|
#endif
|
|
|
|
DisplayBorderBackgroundOutline(aBuilder, aLists);
|
|
|
|
if (GetPrevInFlow()) {
|
|
DisplayOverflowContainers(aBuilder, aDirtyRect, aLists);
|
|
for (nsIFrame* f = mFloats.FirstChild(); f; f = f->GetNextSibling()) {
|
|
if (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT)
|
|
BuildDisplayListForChild(aBuilder, f, aDirtyRect, aLists);
|
|
}
|
|
}
|
|
|
|
aBuilder->MarkFramesForDisplayList(this, mFloats, aDirtyRect);
|
|
|
|
// Prepare for text-overflow processing.
|
|
nsAutoPtr<TextOverflow> textOverflow(
|
|
TextOverflow::WillProcessLines(aBuilder, this));
|
|
|
|
// We'll collect our lines' display items here, & then append this to aLists.
|
|
nsDisplayListCollection linesDisplayListCollection;
|
|
|
|
// Don't use the line cursor if we might have a descendant placeholder ...
|
|
// it might skip lines that contain placeholders but don't themselves
|
|
// intersect with the dirty area.
|
|
// In particular, we really want to check ShouldDescendIntoFrame()
|
|
// on all our child frames, but that might be expensive. So we
|
|
// approximate it by checking it on |this|; if it's true for any
|
|
// frame in our child list, it's also true for |this|.
|
|
nsLineBox* cursor = aBuilder->ShouldDescendIntoFrame(this) ?
|
|
nullptr : GetFirstLineContaining(aDirtyRect.y);
|
|
line_iterator line_end = end_lines();
|
|
nsresult rv = NS_OK;
|
|
|
|
if (cursor) {
|
|
for (line_iterator line = mLines.begin(cursor);
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetVisualOverflowArea();
|
|
if (!lineArea.IsEmpty()) {
|
|
// Because we have a cursor, the combinedArea.ys are non-decreasing.
|
|
// Once we've passed aDirtyRect.YMost(), we can never see it again.
|
|
if (lineArea.y >= aDirtyRect.YMost()) {
|
|
break;
|
|
}
|
|
rv = DisplayLine(aBuilder, lineArea, aDirtyRect, line, depth, drawnLines,
|
|
linesDisplayListCollection, this, textOverflow);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
bool nonDecreasingYs = true;
|
|
int32_t lineCount = 0;
|
|
nscoord lastY = INT32_MIN;
|
|
nscoord lastYMost = INT32_MIN;
|
|
for (line_iterator line = begin_lines();
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetVisualOverflowArea();
|
|
rv = DisplayLine(aBuilder, lineArea, aDirtyRect, line, depth, drawnLines,
|
|
linesDisplayListCollection, this, textOverflow);
|
|
if (NS_FAILED(rv))
|
|
break;
|
|
if (!lineArea.IsEmpty()) {
|
|
if (lineArea.y < lastY
|
|
|| lineArea.YMost() < lastYMost) {
|
|
nonDecreasingYs = false;
|
|
}
|
|
lastY = lineArea.y;
|
|
lastYMost = lineArea.YMost();
|
|
}
|
|
lineCount++;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv) && nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
|
|
SetupLineCursor();
|
|
}
|
|
}
|
|
|
|
// Pick up the resulting text-overflow markers. We append them to
|
|
// PositionedDescendants just before we append the lines' display items,
|
|
// so that our text-overflow markers will appear on top of this block's
|
|
// normal content but below any of its its' positioned children.
|
|
if (textOverflow) {
|
|
aLists.PositionedDescendants()->AppendToTop(&textOverflow->GetMarkers());
|
|
}
|
|
linesDisplayListCollection.MoveTo(aLists);
|
|
|
|
if (NS_SUCCEEDED(rv) && HasOutsideBullet()) {
|
|
// Display outside bullets manually
|
|
nsIFrame* bullet = GetOutsideBullet();
|
|
rv = BuildDisplayListForChild(aBuilder, bullet, aDirtyRect, aLists);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gLamePaintMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
int32_t numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime lines, deltaPerLine, delta;
|
|
lines = int64_t(numLines);
|
|
delta = end - start;
|
|
deltaPerLine = delta / lines;
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
PR_snprintf(buf, sizeof(buf),
|
|
": %lld elapsed (%lld per line) lines=%d drawn=%d skip=%d",
|
|
delta, deltaPerLine,
|
|
numLines, drawnLines, numLines - drawnLines);
|
|
printf("%s\n", buf);
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
a11y::AccType
|
|
nsBlockFrame::AccessibleType()
|
|
{
|
|
// block frame may be for <hr>
|
|
if (mContent->Tag() == nsGkAtoms::hr) {
|
|
return a11y::eHTMLHRAccessible;
|
|
}
|
|
|
|
if (!HasBullet() || !PresContext()) {
|
|
if (!mContent->GetParent()) {
|
|
// Don't create accessible objects for the root content node, they are redundant with
|
|
// the nsDocAccessible object created with the document node
|
|
return a11y::eNoAccessible;
|
|
}
|
|
|
|
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc =
|
|
do_QueryInterface(mContent->GetDocument());
|
|
if (htmlDoc) {
|
|
nsCOMPtr<nsIDOMHTMLElement> body;
|
|
htmlDoc->GetBody(getter_AddRefs(body));
|
|
if (SameCOMIdentity(body, mContent)) {
|
|
// Don't create accessible objects for the body, they are redundant with
|
|
// the nsDocAccessible object created with the document node
|
|
return a11y::eNoAccessible;
|
|
}
|
|
}
|
|
|
|
// Not a bullet, treat as normal HTML container
|
|
return a11y::eHyperTextAccessible;
|
|
}
|
|
|
|
// Create special list bullet accessible
|
|
return a11y::eHTMLLiAccessible;
|
|
}
|
|
#endif
|
|
|
|
void nsBlockFrame::ClearLineCursor()
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return;
|
|
}
|
|
|
|
Properties().Delete(LineCursorProperty());
|
|
RemoveStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
void nsBlockFrame::SetupLineCursor()
|
|
{
|
|
if (GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR
|
|
|| mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
Properties().Set(LineCursorProperty(), mLines.front());
|
|
AddStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
nsLineBox* nsBlockFrame::GetFirstLineContaining(nscoord y)
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return nullptr;
|
|
}
|
|
|
|
FrameProperties props = Properties();
|
|
|
|
nsLineBox* property = static_cast<nsLineBox*>
|
|
(props.Get(LineCursorProperty()));
|
|
line_iterator cursor = mLines.begin(property);
|
|
nsRect cursorArea = cursor->GetVisualOverflowArea();
|
|
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() > y)
|
|
&& cursor != mLines.front()) {
|
|
cursor = cursor.prev();
|
|
cursorArea = cursor->GetVisualOverflowArea();
|
|
}
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() <= y)
|
|
&& cursor != mLines.back()) {
|
|
cursor = cursor.next();
|
|
cursorArea = cursor->GetVisualOverflowArea();
|
|
}
|
|
|
|
if (cursor.get() != property) {
|
|
props.Set(LineCursorProperty(), cursor.get());
|
|
}
|
|
|
|
return cursor.get();
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsBlockFrame::ChildIsDirty(nsIFrame* aChild)
|
|
{
|
|
// See if the child is absolutely positioned
|
|
if (aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW &&
|
|
aChild->IsAbsolutelyPositioned()) {
|
|
// do nothing
|
|
} else if (aChild == GetOutsideBullet()) {
|
|
// The bullet lives in the first line, unless the first line has
|
|
// height 0 and there is a second line, in which case it lives
|
|
// in the second line.
|
|
line_iterator bulletLine = begin_lines();
|
|
if (bulletLine != end_lines() && bulletLine->mBounds.height == 0 &&
|
|
bulletLine != mLines.back()) {
|
|
bulletLine = bulletLine.next();
|
|
}
|
|
|
|
if (bulletLine != end_lines()) {
|
|
MarkLineDirty(bulletLine, &mLines);
|
|
}
|
|
// otherwise we have an empty line list, and ReflowDirtyLines
|
|
// will handle reflowing the bullet.
|
|
} else {
|
|
// Mark the line containing the child frame dirty. We would rather do this
|
|
// in MarkIntrinsicWidthsDirty but that currently won't tell us which
|
|
// child is being dirtied.
|
|
bool isValid;
|
|
nsBlockInFlowLineIterator iter(this, aChild, &isValid);
|
|
if (isValid) {
|
|
iter.GetContainer()->MarkLineDirty(iter.GetLine(), iter.GetLineList());
|
|
}
|
|
}
|
|
|
|
nsBlockFrameSuper::ChildIsDirty(aChild);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
if (aPrevInFlow) {
|
|
// Copy over the inherited block frame bits from the prev-in-flow.
|
|
SetFlags(aPrevInFlow->GetStateBits() &
|
|
(NS_BLOCK_FLAGS_MASK & ~NS_BLOCK_FLAGS_NON_INHERITED_MASK));
|
|
}
|
|
|
|
nsresult rv = nsBlockFrameSuper::Init(aContent, aParent, aPrevInFlow);
|
|
|
|
if (!aPrevInFlow ||
|
|
aPrevInFlow->GetStateBits() & NS_BLOCK_NEEDS_BIDI_RESOLUTION)
|
|
AddStateBits(NS_BLOCK_NEEDS_BIDI_RESOLUTION);
|
|
|
|
if ((GetStateBits() &
|
|
(NS_FRAME_FONT_INFLATION_CONTAINER | NS_BLOCK_FLOAT_MGR)) ==
|
|
(NS_FRAME_FONT_INFLATION_CONTAINER | NS_BLOCK_FLOAT_MGR)) {
|
|
AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::SetInitialChildList(ChildListID aListID,
|
|
nsFrameList& aChildList)
|
|
{
|
|
NS_ASSERTION(aListID != kPrincipalList ||
|
|
(GetStateBits() & (NS_BLOCK_FRAME_HAS_INSIDE_BULLET |
|
|
NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET)) == 0,
|
|
"how can we have a bullet already?");
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
if (kAbsoluteList == aListID) {
|
|
nsContainerFrame::SetInitialChildList(aListID, aChildList);
|
|
}
|
|
else if (kFloatList == aListID) {
|
|
mFloats.SetFrames(aChildList);
|
|
}
|
|
else {
|
|
nsPresContext* presContext = PresContext();
|
|
|
|
#ifdef DEBUG
|
|
// The only times a block that is an anonymous box is allowed to have a
|
|
// first-letter frame are when it's the block inside a non-anonymous cell,
|
|
// the block inside a fieldset, a scrolled content block, or a column
|
|
// content block. Note that this means that blocks which are the anonymous
|
|
// block in {ib} splits do NOT get first-letter frames. Note that
|
|
// NS_BLOCK_HAS_FIRST_LETTER_STYLE gets set on all continuations of the
|
|
// block.
|
|
nsIAtom *pseudo = GetStyleContext()->GetPseudo();
|
|
bool haveFirstLetterStyle =
|
|
(!pseudo ||
|
|
(pseudo == nsCSSAnonBoxes::cellContent &&
|
|
mParent->GetStyleContext()->GetPseudo() == nullptr) ||
|
|
pseudo == nsCSSAnonBoxes::fieldsetContent ||
|
|
pseudo == nsCSSAnonBoxes::scrolledContent ||
|
|
pseudo == nsCSSAnonBoxes::columnContent ||
|
|
pseudo == nsCSSAnonBoxes::mozSVGText) &&
|
|
!IsFrameOfType(eMathML) &&
|
|
nsRefPtr<nsStyleContext>(GetFirstLetterStyle(presContext)) != nullptr;
|
|
NS_ASSERTION(haveFirstLetterStyle ==
|
|
((mState & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0),
|
|
"NS_BLOCK_HAS_FIRST_LETTER_STYLE state out of sync");
|
|
#endif
|
|
|
|
rv = AddFrames(aChildList, nullptr);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Create a list bullet if this is a list-item. Note that this is
|
|
// done here so that RenumberLists will work (it needs the bullets
|
|
// to store the bullet numbers). Also note that due to various
|
|
// wrapper frames (scrollframes, columns) we want to use the
|
|
// outermost (primary, ideally, but it's not set yet when we get
|
|
// here) frame of our content for the display check. On the other
|
|
// hand, we look at ourselves for the GetPrevInFlow() check, since
|
|
// for a columnset we don't want a bullet per column. Note that
|
|
// the outermost frame for the content is the primary frame in
|
|
// most cases; the ones when it's not (like tables) can't be
|
|
// NS_STYLE_DISPLAY_LIST_ITEM).
|
|
nsIFrame* possibleListItem = this;
|
|
while (1) {
|
|
nsIFrame* parent = possibleListItem->GetParent();
|
|
if (parent->GetContent() != GetContent()) {
|
|
break;
|
|
}
|
|
possibleListItem = parent;
|
|
}
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM ==
|
|
possibleListItem->GetStyleDisplay()->mDisplay &&
|
|
!GetPrevInFlow()) {
|
|
// Resolve style for the bullet frame
|
|
const nsStyleList* styleList = GetStyleList();
|
|
nsCSSPseudoElements::Type pseudoType;
|
|
switch (styleList->mListStyleType) {
|
|
case NS_STYLE_LIST_STYLE_DISC:
|
|
case NS_STYLE_LIST_STYLE_CIRCLE:
|
|
case NS_STYLE_LIST_STYLE_SQUARE:
|
|
pseudoType = nsCSSPseudoElements::ePseudo_mozListBullet;
|
|
break;
|
|
default:
|
|
pseudoType = nsCSSPseudoElements::ePseudo_mozListNumber;
|
|
break;
|
|
}
|
|
|
|
nsIPresShell *shell = presContext->PresShell();
|
|
|
|
nsStyleContext* parentStyle =
|
|
CorrectStyleParentFrame(this,
|
|
nsCSSPseudoElements::GetPseudoAtom(pseudoType))->GetStyleContext();
|
|
nsRefPtr<nsStyleContext> kidSC = shell->StyleSet()->
|
|
ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
|
|
parentStyle);
|
|
|
|
// Create bullet frame
|
|
nsBulletFrame* bullet = new (shell) nsBulletFrame(kidSC);
|
|
if (!bullet) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
bullet->Init(mContent, this, nullptr);
|
|
|
|
// If the list bullet frame should be positioned inside then add
|
|
// it to the flow now.
|
|
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE ==
|
|
styleList->mListStylePosition) {
|
|
nsFrameList bulletList(bullet, bullet);
|
|
AddFrames(bulletList, nullptr);
|
|
Properties().Set(InsideBulletProperty(), bullet);
|
|
AddStateBits(NS_BLOCK_FRAME_HAS_INSIDE_BULLET);
|
|
} else {
|
|
nsFrameList* bulletList = new nsFrameList(bullet, bullet);
|
|
Properties().Set(OutsideBulletProperty(), bulletList);
|
|
AddStateBits(NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET);
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::BulletIsEmpty() const
|
|
{
|
|
NS_ASSERTION(mContent->GetPrimaryFrame()->GetStyleDisplay()->mDisplay ==
|
|
NS_STYLE_DISPLAY_LIST_ITEM && HasOutsideBullet(),
|
|
"should only care when we have an outside bullet");
|
|
const nsStyleList* list = GetStyleList();
|
|
return list->mListStyleType == NS_STYLE_LIST_STYLE_NONE &&
|
|
!list->GetListStyleImage();
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::GetBulletText(nsAString& aText) const
|
|
{
|
|
aText.Truncate();
|
|
|
|
const nsStyleList* myList = GetStyleList();
|
|
if (myList->GetListStyleImage() ||
|
|
myList->mListStyleType == NS_STYLE_LIST_STYLE_DISC) {
|
|
aText.Assign(kDiscCharacter);
|
|
}
|
|
else if (myList->mListStyleType == NS_STYLE_LIST_STYLE_CIRCLE) {
|
|
aText.Assign(kCircleCharacter);
|
|
}
|
|
else if (myList->mListStyleType == NS_STYLE_LIST_STYLE_SQUARE) {
|
|
aText.Assign(kSquareCharacter);
|
|
}
|
|
else if (myList->mListStyleType != NS_STYLE_LIST_STYLE_NONE) {
|
|
nsBulletFrame* bullet = GetBullet();
|
|
if (bullet) {
|
|
nsAutoString text;
|
|
bullet->GetListItemText(*myList, text);
|
|
aText = text;
|
|
}
|
|
}
|
|
}
|
|
|
|
// static
|
|
bool
|
|
nsBlockFrame::FrameStartsCounterScope(nsIFrame* aFrame)
|
|
{
|
|
nsIContent* content = aFrame->GetContent();
|
|
if (!content || !content->IsHTML())
|
|
return false;
|
|
|
|
nsIAtom *localName = content->NodeInfo()->NameAtom();
|
|
return localName == nsGkAtoms::ol ||
|
|
localName == nsGkAtoms::ul ||
|
|
localName == nsGkAtoms::dir ||
|
|
localName == nsGkAtoms::menu;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::RenumberLists(nsPresContext* aPresContext)
|
|
{
|
|
if (!FrameStartsCounterScope(this)) {
|
|
// If this frame doesn't start a counter scope then we don't need
|
|
// to renumber child list items.
|
|
return false;
|
|
}
|
|
|
|
MOZ_ASSERT(mContent->IsHTML(),
|
|
"FrameStartsCounterScope should only return true for HTML elements");
|
|
|
|
// Setup initial list ordinal value
|
|
// XXX Map html's start property to counter-reset style
|
|
int32_t ordinal = 1;
|
|
int32_t increment;
|
|
if (mContent->Tag() == nsGkAtoms::ol &&
|
|
mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::reversed)) {
|
|
increment = -1;
|
|
} else {
|
|
increment = 1;
|
|
}
|
|
|
|
nsGenericHTMLElement *hc = nsGenericHTMLElement::FromContent(mContent);
|
|
// Must be non-null, since FrameStartsCounterScope only returns true
|
|
// for HTML elements.
|
|
MOZ_ASSERT(hc, "How is mContent not HTML?");
|
|
const nsAttrValue* attr = hc->GetParsedAttr(nsGkAtoms::start);
|
|
if (attr && attr->Type() == nsAttrValue::eInteger) {
|
|
ordinal = attr->GetIntegerValue();
|
|
} else if (increment < 0) {
|
|
// <ol reversed> case, or some other case with a negative increment: count
|
|
// up the child list
|
|
ordinal = 0;
|
|
for (nsIContent* kid = mContent->GetFirstChild(); kid;
|
|
kid = kid->GetNextSibling()) {
|
|
if (kid->IsHTML(nsGkAtoms::li)) {
|
|
ordinal -= increment;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Get to first-in-flow
|
|
nsBlockFrame* block = (nsBlockFrame*) GetFirstInFlow();
|
|
return RenumberListsInBlock(aPresContext, block, &ordinal, 0, increment);
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::RenumberListsInBlock(nsPresContext* aPresContext,
|
|
nsBlockFrame* aBlockFrame,
|
|
int32_t* aOrdinal,
|
|
int32_t aDepth,
|
|
int32_t aIncrement)
|
|
{
|
|
// Examine each line in the block
|
|
bool foundValidLine;
|
|
nsBlockInFlowLineIterator bifLineIter(aBlockFrame, &foundValidLine);
|
|
|
|
if (!foundValidLine)
|
|
return false;
|
|
|
|
bool renumberedABullet = false;
|
|
|
|
do {
|
|
nsLineList::iterator line = bifLineIter.GetLine();
|
|
nsIFrame* kid = line->mFirstChild;
|
|
int32_t n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
bool kidRenumberedABullet = RenumberListsFor(aPresContext, kid, aOrdinal,
|
|
aDepth, aIncrement);
|
|
if (kidRenumberedABullet) {
|
|
line->MarkDirty();
|
|
renumberedABullet = true;
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
} while (bifLineIter.Next());
|
|
|
|
return renumberedABullet;
|
|
}
|
|
|
|
bool
|
|
nsBlockFrame::RenumberListsFor(nsPresContext* aPresContext,
|
|
nsIFrame* aKid,
|
|
int32_t* aOrdinal,
|
|
int32_t aDepth,
|
|
int32_t aIncrement)
|
|
{
|
|
NS_PRECONDITION(aPresContext && aKid && aOrdinal, "null params are immoral!");
|
|
|
|
// add in a sanity check for absurdly deep frame trees. See bug 42138
|
|
if (MAX_DEPTH_FOR_LIST_RENUMBERING < aDepth)
|
|
return false;
|
|
|
|
// if the frame is a placeholder, then get the out of flow frame
|
|
nsIFrame* kid = nsPlaceholderFrame::GetRealFrameFor(aKid);
|
|
const nsStyleDisplay* display = kid->GetStyleDisplay();
|
|
|
|
// drill down through any wrappers to the real frame
|
|
kid = kid->GetContentInsertionFrame();
|
|
|
|
// possible there is no content insertion frame
|
|
if (!kid)
|
|
return false;
|
|
|
|
bool kidRenumberedABullet = false;
|
|
|
|
// If the frame is a list-item and the frame implements our
|
|
// block frame API then get its bullet and set the list item
|
|
// ordinal.
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
|
|
// Make certain that the frame is a block frame in case
|
|
// something foreign has crept in.
|
|
nsBlockFrame* listItem = nsLayoutUtils::GetAsBlock(kid);
|
|
if (listItem) {
|
|
nsBulletFrame* bullet = listItem->GetBullet();
|
|
if (bullet) {
|
|
bool changed;
|
|
*aOrdinal = bullet->SetListItemOrdinal(*aOrdinal, &changed, aIncrement);
|
|
if (changed) {
|
|
kidRenumberedABullet = true;
|
|
|
|
// The ordinal changed - mark the bullet frame dirty.
|
|
listItem->ChildIsDirty(bullet);
|
|
}
|
|
}
|
|
|
|
// XXX temporary? if the list-item has child list-items they
|
|
// should be numbered too; especially since the list-item is
|
|
// itself (ASSUMED!) not to be a counter-resetter.
|
|
bool meToo = RenumberListsInBlock(aPresContext, listItem, aOrdinal,
|
|
aDepth + 1, aIncrement);
|
|
if (meToo) {
|
|
kidRenumberedABullet = true;
|
|
}
|
|
}
|
|
}
|
|
else if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
|
|
if (FrameStartsCounterScope(kid)) {
|
|
// Don't bother recursing into a block frame that is a new
|
|
// counter scope. Any list-items in there will be handled by
|
|
// it.
|
|
}
|
|
else {
|
|
// If the display=block element is a block frame then go ahead
|
|
// and recurse into it, as it might have child list-items.
|
|
nsBlockFrame* kidBlock = nsLayoutUtils::GetAsBlock(kid);
|
|
if (kidBlock) {
|
|
kidRenumberedABullet = RenumberListsInBlock(aPresContext, kidBlock,
|
|
aOrdinal, aDepth + 1,
|
|
aIncrement);
|
|
}
|
|
}
|
|
}
|
|
return kidRenumberedABullet;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowBullet(nsIFrame* aBulletFrame,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nscoord aLineTop)
|
|
{
|
|
const nsHTMLReflowState &rs = aState.mReflowState;
|
|
|
|
// Reflow the bullet now
|
|
nsSize availSize;
|
|
// Make up a width since it doesn't really matter (XXX).
|
|
availSize.width = aState.mContentArea.width;
|
|
availSize.height = NS_UNCONSTRAINEDSIZE;
|
|
|
|
// Get the reason right.
|
|
// XXXwaterson Should this look just like the logic in
|
|
// nsBlockReflowContext::ReflowBlock and nsLineLayout::ReflowFrame?
|
|
nsHTMLReflowState reflowState(aState.mPresContext, rs,
|
|
aBulletFrame, availSize);
|
|
nsReflowStatus status;
|
|
aBulletFrame->WillReflow(aState.mPresContext);
|
|
aBulletFrame->Reflow(aState.mPresContext, aMetrics, reflowState, status);
|
|
|
|
// Get the float available space using our saved state from before we
|
|
// started reflowing the block, so that we ignore any floats inside
|
|
// the block.
|
|
// FIXME: aLineTop isn't actually set correctly by some callers, since
|
|
// they reposition the line.
|
|
nsRect floatAvailSpace =
|
|
aState.GetFloatAvailableSpaceWithState(aLineTop,
|
|
&aState.mFloatManagerStateBefore)
|
|
.mRect;
|
|
// FIXME (bug 25888): need to check the entire region that the first
|
|
// line overlaps, not just the top pixel.
|
|
|
|
// Place the bullet now. We want to place the bullet relative to the
|
|
// border-box of the associated block (using the right/left margin of
|
|
// the bullet frame as separation). However, if a line box would be
|
|
// displaced by floats that are *outside* the associated block, we
|
|
// want to displace it by the same amount. That is, we act as though
|
|
// the edge of the floats is the content-edge of the block, and place
|
|
// the bullet at a position offset from there by the block's padding,
|
|
// the block's border, and the bullet frame's margin.
|
|
nscoord x;
|
|
if (rs.mStyleVisibility->mDirection == NS_STYLE_DIRECTION_LTR) {
|
|
// The floatAvailSpace.x gives us the content/float edge. Then we
|
|
// subtract out the left border/padding and the bullet's width and
|
|
// margin to offset the position.
|
|
x = floatAvailSpace.x - rs.mComputedBorderPadding.left
|
|
- reflowState.mComputedMargin.right - aMetrics.width;
|
|
} else {
|
|
// The XMost() of the available space give us offsets from the left
|
|
// border edge. Then we add the right border/padding and the
|
|
// bullet's margin to offset the position.
|
|
x = floatAvailSpace.XMost() + rs.mComputedBorderPadding.right
|
|
+ reflowState.mComputedMargin.left;
|
|
}
|
|
|
|
// Approximate the bullets position; vertical alignment will provide
|
|
// the final vertical location.
|
|
nscoord y = aState.mContentArea.y;
|
|
aBulletFrame->SetRect(nsRect(x, y, aMetrics.width, aMetrics.height));
|
|
aBulletFrame->DidReflow(aState.mPresContext, &aState.mReflowState,
|
|
NS_FRAME_REFLOW_FINISHED);
|
|
}
|
|
|
|
// This is used to scan frames for any float placeholders, add their
|
|
// floats to the list represented by aList, and remove the
|
|
// floats from whatever list they might be in. We don't search descendants
|
|
// that are float containing blocks. The floats must be children of 'this'.
|
|
void nsBlockFrame::CollectFloats(nsIFrame* aFrame, nsFrameList& aList,
|
|
bool aFromOverflow, bool aCollectSiblings) {
|
|
while (aFrame) {
|
|
// Don't descend into float containing blocks.
|
|
if (!aFrame->IsFloatContainingBlock()) {
|
|
nsIFrame *outOfFlowFrame =
|
|
aFrame->GetType() == nsGkAtoms::placeholderFrame ?
|
|
nsLayoutUtils::GetFloatFromPlaceholder(aFrame) : nullptr;
|
|
if (outOfFlowFrame) {
|
|
if (outOfFlowFrame->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT) {
|
|
if (outOfFlowFrame->GetParent() == this) {
|
|
nsFrameList* list = GetPushedFloats();
|
|
if (!list || !list->RemoveFrameIfPresent(outOfFlowFrame)) {
|
|
if (aFromOverflow) {
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.RemoveFrame(outOfFlowFrame);
|
|
} else {
|
|
mFloats.RemoveFrame(outOfFlowFrame);
|
|
}
|
|
}
|
|
aList.AppendFrame(nullptr, outOfFlowFrame);
|
|
}
|
|
// FIXME: By not pulling floats whose parent is one of our
|
|
// later siblings, are we risking the pushed floats getting
|
|
// out-of-order?
|
|
} else {
|
|
// Make sure that its parent is us. Otherwise we don't want
|
|
// to mess around with it because it belongs to someone
|
|
// else. I think this could happen if the overflow lines
|
|
// contain a block descendant which owns its own floats.
|
|
NS_ASSERTION(outOfFlowFrame->GetParent() == this,
|
|
"Out of flow frame doesn't have the expected parent");
|
|
if (aFromOverflow) {
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.RemoveFrame(outOfFlowFrame);
|
|
} else {
|
|
mFloats.RemoveFrame(outOfFlowFrame);
|
|
}
|
|
aList.AppendFrame(nullptr, outOfFlowFrame);
|
|
}
|
|
}
|
|
|
|
CollectFloats(aFrame->GetFirstPrincipalChild(),
|
|
aList, aFromOverflow, true);
|
|
// Note: Even though we're calling CollectFloats on aFrame's overflow
|
|
// list, we'll pass down aFromOverflow unchanged because we're still
|
|
// traversing the regular-children subtree of the 'this' frame.
|
|
CollectFloats(aFrame->GetFirstChild(kOverflowList),
|
|
aList, aFromOverflow, true);
|
|
}
|
|
if (!aCollectSiblings)
|
|
break;
|
|
aFrame = aFrame->GetNextSibling();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CheckFloats(nsBlockReflowState& aState)
|
|
{
|
|
#ifdef DEBUG
|
|
// If any line is still dirty, that must mean we're going to reflow this
|
|
// block again soon (e.g. because we bailed out after noticing that
|
|
// clearance was imposed), so don't worry if the floats are out of sync.
|
|
bool anyLineDirty = false;
|
|
|
|
// Check that the float list is what we would have built
|
|
nsAutoTArray<nsIFrame*, 8> lineFloats;
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->HasFloats()) {
|
|
nsFloatCache* fc = line->GetFirstFloat();
|
|
while (fc) {
|
|
lineFloats.AppendElement(fc->mFloat);
|
|
fc = fc->Next();
|
|
}
|
|
}
|
|
if (line->IsDirty()) {
|
|
anyLineDirty = true;
|
|
}
|
|
}
|
|
|
|
nsAutoTArray<nsIFrame*, 8> storedFloats;
|
|
bool equal = true;
|
|
uint32_t i = 0;
|
|
for (nsIFrame* f = mFloats.FirstChild(); f; f = f->GetNextSibling()) {
|
|
if (f->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT)
|
|
continue;
|
|
storedFloats.AppendElement(f);
|
|
if (i < lineFloats.Length() && lineFloats.ElementAt(i) != f) {
|
|
equal = false;
|
|
}
|
|
++i;
|
|
}
|
|
|
|
if ((!equal || lineFloats.Length() != storedFloats.Length()) && !anyLineDirty) {
|
|
NS_WARNING("nsBlockFrame::CheckFloats: Explicit float list is out of sync with float cache");
|
|
#if defined(DEBUG_roc)
|
|
nsFrame::RootFrameList(PresContext(), stdout, 0);
|
|
for (i = 0; i < lineFloats.Length(); ++i) {
|
|
printf("Line float: %p\n", lineFloats.ElementAt(i));
|
|
}
|
|
for (i = 0; i < storedFloats.Length(); ++i) {
|
|
printf("Stored float: %p\n", storedFloats.ElementAt(i));
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
const nsFrameList* oofs = GetOverflowOutOfFlows();
|
|
if (oofs && oofs->NotEmpty()) {
|
|
// Floats that were pushed should be removed from our float
|
|
// manager. Otherwise the float manager's YMost or XMost might
|
|
// be larger than necessary, causing this block to get an
|
|
// incorrect desired height (or width). Some of these floats
|
|
// may not actually have been added to the float manager because
|
|
// they weren't reflowed before being pushed; that's OK,
|
|
// RemoveRegions will ignore them. It is safe to do this here
|
|
// because we know from here on the float manager will only be
|
|
// used for its XMost and YMost, not to place new floats and
|
|
// lines.
|
|
aState.mFloatManager->RemoveTrailingRegions(oofs->FirstChild());
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::IsMarginRoot(bool* aTopMarginRoot, bool* aBottomMarginRoot)
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_MARGIN_ROOT)) {
|
|
nsIFrame* parent = GetParent();
|
|
if (!parent || parent->IsFloatContainingBlock()) {
|
|
*aTopMarginRoot = false;
|
|
*aBottomMarginRoot = false;
|
|
return;
|
|
}
|
|
if (parent->GetType() == nsGkAtoms::columnSetFrame) {
|
|
*aTopMarginRoot = GetPrevInFlow() == nullptr;
|
|
*aBottomMarginRoot = GetNextInFlow() == nullptr;
|
|
return;
|
|
}
|
|
}
|
|
|
|
*aTopMarginRoot = true;
|
|
*aBottomMarginRoot = true;
|
|
}
|
|
|
|
/* static */
|
|
bool
|
|
nsBlockFrame::BlockNeedsFloatManager(nsIFrame* aBlock)
|
|
{
|
|
NS_PRECONDITION(aBlock, "Must have a frame");
|
|
NS_ASSERTION(nsLayoutUtils::GetAsBlock(aBlock), "aBlock must be a block");
|
|
|
|
nsIFrame* parent = aBlock->GetParent();
|
|
return (aBlock->GetStateBits() & NS_BLOCK_FLOAT_MGR) ||
|
|
(parent && !parent->IsFloatContainingBlock());
|
|
}
|
|
|
|
/* static */
|
|
bool
|
|
nsBlockFrame::BlockCanIntersectFloats(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->IsFrameOfType(nsIFrame::eBlockFrame) &&
|
|
!aFrame->IsFrameOfType(nsIFrame::eReplaced) &&
|
|
!(aFrame->GetStateBits() & NS_BLOCK_FLOAT_MGR);
|
|
}
|
|
|
|
// Note that this width can vary based on the vertical position.
|
|
// However, the cases where it varies are the cases where the width fits
|
|
// in the available space given, which means that variation shouldn't
|
|
// matter.
|
|
/* static */
|
|
nsBlockFrame::ReplacedElementWidthToClear
|
|
nsBlockFrame::WidthToClearPastFloats(nsBlockReflowState& aState,
|
|
const nsRect& aFloatAvailableSpace,
|
|
nsIFrame* aFrame)
|
|
{
|
|
nscoord leftOffset, rightOffset;
|
|
nsCSSOffsetState offsetState(aFrame, aState.mReflowState.rendContext,
|
|
aState.mContentArea.width);
|
|
|
|
ReplacedElementWidthToClear result;
|
|
aState.ComputeReplacedBlockOffsetsForFloats(aFrame, aFloatAvailableSpace,
|
|
leftOffset, rightOffset);
|
|
nscoord availWidth = aState.mContentArea.width - leftOffset - rightOffset;
|
|
|
|
// We actually don't want the min width here; see bug 427782; we only
|
|
// want to displace if the width won't compute to a value small enough
|
|
// to fit.
|
|
// All we really need here is the result of ComputeSize, and we
|
|
// could *almost* get that from an nsCSSOffsetState, except for the
|
|
// last argument.
|
|
nsSize availSpace(availWidth, NS_UNCONSTRAINEDSIZE);
|
|
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
|
|
aFrame, availSpace);
|
|
result.borderBoxWidth = reflowState.ComputedWidth() +
|
|
reflowState.mComputedBorderPadding.LeftRight();
|
|
// Use the margins from offsetState rather than reflowState so that
|
|
// they aren't reduced by ignoring margins in overconstrained cases.
|
|
result.marginLeft = offsetState.mComputedMargin.left;
|
|
result.marginRight = offsetState.mComputedMargin.right;
|
|
return result;
|
|
}
|
|
|
|
/* static */
|
|
nsBlockFrame*
|
|
nsBlockFrame::GetNearestAncestorBlock(nsIFrame* aCandidate)
|
|
{
|
|
nsBlockFrame* block = nullptr;
|
|
while(aCandidate) {
|
|
block = nsLayoutUtils::GetAsBlock(aCandidate);
|
|
if (block) {
|
|
// yay, candidate is a block!
|
|
return block;
|
|
}
|
|
// Not a block. Check its parent next.
|
|
aCandidate = aCandidate->GetParent();
|
|
}
|
|
NS_NOTREACHED("Fell off frame tree looking for ancestor block!");
|
|
return nullptr;
|
|
}
|
|
|
|
nscoord
|
|
nsBlockFrame::GetEffectiveComputedHeight(const nsHTMLReflowState& aReflowState) const
|
|
{
|
|
nscoord height = aReflowState.ComputedHeight();
|
|
NS_ABORT_IF_FALSE(height != NS_UNCONSTRAINEDSIZE, "Don't call me!");
|
|
|
|
if (GetPrevInFlow()) {
|
|
// Reduce the height by the computed height of prev-in-flows.
|
|
for (nsIFrame* prev = GetPrevInFlow(); prev; prev = prev->GetPrevInFlow()) {
|
|
height -= prev->GetRect().height;
|
|
}
|
|
// We just subtracted our top-border padding, since it was included in the
|
|
// first frame's height. Add it back to get the content height.
|
|
height += aReflowState.mComputedBorderPadding.top;
|
|
// We may have stretched the frame beyond its computed height. Oh well.
|
|
height = NS_MAX(0, height);
|
|
}
|
|
return height;
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
nsresult
|
|
nsBlockFrame::ResolveBidi()
|
|
{
|
|
NS_ASSERTION(!GetPrevInFlow(),
|
|
"ResolveBidi called on non-first continuation");
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
if (!presContext->BidiEnabled()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
return nsBidiPresUtils::Resolve(this);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsBlockFrame::VerifyLines(bool aFinalCheckOK)
|
|
{
|
|
if (!gVerifyLines) {
|
|
return;
|
|
}
|
|
if (mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
nsLineBox* cursor = GetLineCursor();
|
|
|
|
// Add up the counts on each line. Also validate that IsFirstLine is
|
|
// set properly.
|
|
int32_t count = 0;
|
|
line_iterator line, line_end;
|
|
for (line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
if (line == cursor) {
|
|
cursor = nullptr;
|
|
}
|
|
if (aFinalCheckOK) {
|
|
NS_ABORT_IF_FALSE(line->GetChildCount(), "empty line");
|
|
if (line->IsBlock()) {
|
|
NS_ASSERTION(1 == line->GetChildCount(), "bad first line");
|
|
}
|
|
}
|
|
count += line->GetChildCount();
|
|
}
|
|
|
|
// Then count the frames
|
|
int32_t frameCount = 0;
|
|
nsIFrame* frame = mLines.front()->mFirstChild;
|
|
while (frame) {
|
|
frameCount++;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
NS_ASSERTION(count == frameCount, "bad line list");
|
|
|
|
// Next: test that each line has right number of frames on it
|
|
for (line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
) {
|
|
count = line->GetChildCount();
|
|
frame = line->mFirstChild;
|
|
while (--count >= 0) {
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
++line;
|
|
if ((line != line_end) && (0 != line->GetChildCount())) {
|
|
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
|
|
}
|
|
}
|
|
|
|
if (cursor) {
|
|
FrameLines* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
line_iterator line = overflowLines->mLines.begin();
|
|
line_iterator line_end = overflowLines->mLines.end();
|
|
for (; line != line_end; ++line) {
|
|
if (line == cursor) {
|
|
cursor = nullptr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
NS_ASSERTION(!cursor, "stale LineCursorProperty");
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::VerifyOverflowSituation()
|
|
{
|
|
nsBlockFrame* flow = static_cast<nsBlockFrame*>(GetFirstInFlow());
|
|
while (flow) {
|
|
FrameLines* overflowLines = flow->GetOverflowLines();
|
|
if (overflowLines) {
|
|
NS_ASSERTION(!overflowLines->mLines.empty(),
|
|
"should not be empty if present");
|
|
NS_ASSERTION(overflowLines->mLines.front()->mFirstChild,
|
|
"bad overflow lines");
|
|
NS_ASSERTION(overflowLines->mLines.front()->mFirstChild ==
|
|
overflowLines->mFrames.FirstChild(),
|
|
"bad overflow frames / lines");
|
|
}
|
|
nsLineBox* cursor = flow->GetLineCursor();
|
|
if (cursor) {
|
|
line_iterator line = flow->begin_lines();
|
|
line_iterator line_end = flow->end_lines();
|
|
for (; line != line_end && line != cursor; ++line)
|
|
;
|
|
if (line == line_end && overflowLines) {
|
|
line = overflowLines->mLines.begin();
|
|
line_end = overflowLines->mLines.end();
|
|
for (; line != line_end && line != cursor; ++line)
|
|
;
|
|
}
|
|
MOZ_ASSERT(line != line_end, "stale LineCursorProperty");
|
|
}
|
|
flow = static_cast<nsBlockFrame*>(flow->GetNextInFlow());
|
|
}
|
|
}
|
|
|
|
int32_t
|
|
nsBlockFrame::GetDepth() const
|
|
{
|
|
int32_t depth = 0;
|
|
nsIFrame* parent = mParent;
|
|
while (parent) {
|
|
parent = parent->GetParent();
|
|
depth++;
|
|
}
|
|
return depth;
|
|
}
|
|
#endif
|