forked from mirrors/gecko-dev
5475 lines
170 KiB
C++
5475 lines
170 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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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 "nsBlockBandData.h"
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#include "nsBulletFrame.h"
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#include "nsLineBox.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 "nsHTMLIIDs.h"
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#include "nsCSSRendering.h"
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#include "nsIPresContext.h"
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#include "nsIPresShell.h"
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#include "nsIReflowCommand.h"
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#include "nsISpaceManager.h"
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#include "nsIStyleContext.h"
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#include "nsIView.h"
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#include "nsIFontMetrics.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLAtoms.h"
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#include "nsHTMLValue.h"
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#include "nsDOMEvent.h"
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#include "nsIHTMLContent.h"
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#include "prprf.h"
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#include "nsLayoutAtoms.h"
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// XXX temporary for :first-letter support
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#include "nsITextContent.h"
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static NS_DEFINE_IID(kITextContentIID, NS_ITEXT_CONTENT_IID);/* XXX */
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// XXX for IsEmptyLine
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#include "nsTextFragment.h"
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// XXX get rid of the need for this
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#define SLOW_INCREMENTAL_REFLOW
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// XXX HTML:P's that are empty yet have style indicating they should
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// clear floaters - we need to ignore the clear behavior.
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#ifdef NS_DEBUG
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#undef NOISY_FIRST_LINE
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#undef REALLY_NOISY_FIRST_LINE
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#undef NOISY_FIRST_LETTER
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#undef NOISY_MAX_ELEMENT_SIZE
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#undef NOISY_FLOATER_CLEARING
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#undef NOISY_INCREMENTAL_REFLOW
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#undef NOISY_FINAL_SIZE
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#undef NOISY_REMOVE_FRAME
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#undef NOISY_DAMAGE_REPAIR
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#undef NOISY_COMBINED_AREA
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#undef NOISY_VERTICAL_MARGINS
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#undef REFLOW_STATUS_COVERAGE
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#else
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#undef NOISY_FIRST_LINE
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#undef REALLY_NOISY_FIRST_LINE
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#undef NOISY_FIRST_LETTER
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#undef NOISY_MAX_ELEMENT_SIZE
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#undef NOISY_FLOATER_CLEARING
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#undef NOISY_INCREMENTAL_REFLOW
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#undef NOISY_FINAL_SIZE
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#undef NOISY_REMOVE_FRAME
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#undef NOISY_DAMAGE_REPAIR
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#undef NOISY_COMBINED_AREA
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#undef NOISY_VERTICAL_MARGINS
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#undef REFLOW_STATUS_COVERAGE
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#endif
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//----------------------------------------------------------------------
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// Debugging support code
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#ifdef NOISY_INCREMENTAL_REFLOW
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static PRInt32 gNoiseIndent;
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static const char* kReflowCommandType[] = {
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"FrameAppended",
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"FrameInserted",
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"FrameRemoved",
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"ContentChanged",
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"StyleChanged",
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"PullupReflow",
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"PushReflow",
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"CheckPullupReflow",
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"ReflowDirty",
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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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nsIStyleContext* sc;
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aFrame->GetStyleContext(&sc);
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while (nsnull != sc) {
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nsIStyleContext* psc;
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printf("%p ", sc);
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psc = sc->GetParent();
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NS_RELEASE(sc);
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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(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
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{
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static PRUint32 record[2];
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// 0: child-is-block
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// 1: child-is-inline
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PRIntn index = 0;
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if (!aChildIsBlock) index |= 1;
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// Compute new status
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PRUint32 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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//----------------------------------------------------------------------
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inline void CombineRects(const nsRect& r1, nsRect& r2)
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{
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nscoord x0 = r2.x;
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nscoord y0 = r2.y;
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nscoord x1 = x0 + r2.width;
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nscoord y1 = y0 + r2.height;
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nscoord x = r1.x;
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nscoord y = r1.y;
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nscoord xmost = x + r1.width;
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nscoord ymost = y + r1.height;
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if (x < x0) {
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x0 = x;
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}
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if (xmost > x1) {
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x1 = xmost;
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}
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if (y < y0) {
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y0 = y;
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}
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if (ymost > y1) {
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y1 = ymost;
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}
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r2.x = x0;
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r2.y = y0;
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r2.width = x1 - x0;
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r2.height = y1 - y0;
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}
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//----------------------------------------------------------------------
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class nsBlockReflowState {
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public:
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nsBlockReflowState(const nsHTMLReflowState& aReflowState,
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nsIPresContext& aPresContext,
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nsBlockFrame* aFrame,
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const nsHTMLReflowMetrics& aMetrics,
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nsLineLayout* aLineLayout);
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~nsBlockReflowState();
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/**
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* Update our state when aLine is skipped over during incremental
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* reflow.
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*/
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void RecoverStateFrom(nsLineBox* aLine, PRBool aPrevLineWasClean);
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/**
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* Get the available reflow space for the current y coordinate. The
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* available space is relative to our coordinate system (0,0) is our
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* upper left corner.
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*/
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void GetAvailableSpace() {
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#ifdef DEBUG
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// Verify that the caller setup the coordinate system properly
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nscoord wx, wy;
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mSpaceManager->GetTranslation(wx, wy);
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NS_ASSERTION((wx == mSpaceManagerX) && (wy == mSpaceManagerY),
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"bad coord system");
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#endif
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mBand.GetAvailableSpace(mY - BorderPadding().top, mAvailSpaceRect);
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#ifdef NOISY_INCREMENTAL_REFLOW
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if (mReflowState.reason == eReflowReason_Incremental) {
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nsFrame::IndentBy(stdout, gNoiseIndent);
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printf("GetAvailableSpace: band=%d,%d,%d,%d count=%d\n",
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mAvailSpaceRect.x, mAvailSpaceRect.y,
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mAvailSpaceRect.width, mAvailSpaceRect.height,
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mBand.GetTrapezoidCount());
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}
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#endif
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}
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void InitFloater(nsPlaceholderFrame* aPlaceholderFrame);
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void AddFloater(nsPlaceholderFrame* aPlaceholderFrame,
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PRBool aInitialReflow);
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PRBool CanPlaceFloater(const nsRect& aFloaterRect, PRUint8 aFloats);
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void PlaceFloater(nsPlaceholderFrame* aFloater,
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const nsMargin& aFloaterMargins,
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PRBool* aIsLeftFloater,
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nsPoint* aNewOrigin);
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void PlaceBelowCurrentLineFloaters(nsVoidArray* aFloaters,
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PRBool aReflowFloaters);
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void PlaceCurrentLineFloaters(nsVoidArray* aFloaters);
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void ClearFloaters(nscoord aY, PRUint8 aBreakType);
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PRBool ClearPastFloaters(PRUint8 aBreakType);
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PRBool IsLeftMostChild(nsIFrame* aFrame);
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PRBool IsAdjacentWithTop() const {
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return mY == mReflowState.mComputedBorderPadding.top;
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}
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const nsMargin& BorderPadding() const {
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return mReflowState.mComputedBorderPadding;
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}
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void UpdateMaxElementSize(const nsSize& aMaxElementSize) {
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#ifdef NOISY_MAX_ELEMENT_SIZE
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nsSize oldSize = mMaxElementSize;
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#endif
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if (aMaxElementSize.width > mMaxElementSize.width) {
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mMaxElementSize.width = aMaxElementSize.width;
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}
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if (aMaxElementSize.height > mMaxElementSize.height) {
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mMaxElementSize.height = aMaxElementSize.height;
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}
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#ifdef NOISY_MAX_ELEMENT_SIZE
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if ((mMaxElementSize.width != oldSize.width) ||
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(mMaxElementSize.height != oldSize.height)) {
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nsFrame::IndentBy(stdout, GetDepth());
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if (NS_UNCONSTRAINEDSIZE == mReflowState.availableWidth) {
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printf("PASS1 ");
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}
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nsFrame::ListTag(stdout, mBlock);
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printf(": old max-element-size=%d,%d new=%d,%d\n",
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oldSize.width, oldSize.height,
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mMaxElementSize.width, mMaxElementSize.height);
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}
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#endif
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}
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void RecoverVerticalMargins(nsLineBox* aLine,
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PRBool aApplyTopMargin,
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nscoord* aTopMarginResult,
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nscoord* aBottomMarginResult);
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void ComputeBlockAvailSpace(nsSplittableType aSplitType, nsRect& aResult);
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void RecoverStateFrom(nsLineBox* aLine,
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PRBool aApplyTopMargin,
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nscoord aDeltaY);
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//----------------------------------------
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// This state is the "global" state computed once for the reflow of
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// the block.
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// The block frame that is using this object
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nsBlockFrame* mBlock;
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nsIPresContext& mPresContext;
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const nsHTMLReflowState& mReflowState;
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nsLineLayout* mLineLayout;
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nsISpaceManager* mSpaceManager;
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// The coordinates within the spacemanager where the block is being
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// placed <b>after</b> taking into account the blocks border and
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// padding. This, therefore, represents the inner "content area" (in
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// spacemanager coordinates) where child frames will be placed,
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// including child blocks and floaters.
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nscoord mSpaceManagerX, mSpaceManagerY;
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// XXX get rid of this
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nsReflowStatus mReflowStatus;
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nscoord mBottomEdge;
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PRBool mUnconstrainedWidth;
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PRBool mUnconstrainedHeight;
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// The content area to reflow child frames within. The x/y
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// coordinates are known to be mBorderPadding.left and
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// mBorderPadding.top. The width/height may be NS_UNCONSTRAINEDSIZE
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// if the container reflowing this frame has given the frame an
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// unconstrained area.
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nsSize mContentArea;
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// Our wrapping behavior
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PRBool mNoWrap;
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// Is this frame a root for top/bottom margin collapsing?
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PRBool mIsTopMarginRoot, mIsBottomMarginRoot;
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// See ShouldApplyTopMargin
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PRBool mApplyTopMargin;
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//----------------------------------------
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// This state is "running" state updated by the reflow of each line
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// in the block. This same state is "recovered" when a line is not
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// dirty and is passed over during incremental reflow.
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// The current line being reflowed
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nsLineBox* mCurrentLine;
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// The previous line just reflowed
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nsLineBox* mPrevLine;
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// The current Y coordinate in the block
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nscoord mY;
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// The available space within the current band.
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nsRect mAvailSpaceRect;
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// The maximum x-most of each line
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nscoord mKidXMost;
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// The combined area of all floaters placed so far
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nsRect mFloaterCombinedArea;
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// Previous child. This is used when pulling up a frame to update
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// the sibling list.
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nsIFrame* mPrevChild;
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// The next immediate child frame that is the target of an
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// incremental reflow command. Once that child has been reflowed we
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// null this slot out.
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nsIFrame* mNextRCFrame;
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// The previous child frames collapsed bottom margin value.
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nscoord mPrevBottomMargin;
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// The current next-in-flow for the block. When lines are pulled
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// from a next-in-flow, this is used to know which next-in-flow to
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// pull from. When a next-in-flow is emptied of lines, we advance
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// this to the next next-in-flow.
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nsBlockFrame* mNextInFlow;
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// The current band data for the current Y coordinate
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nsBlockBandData mBand;
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//----------------------------------------
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// Temporary line-reflow state. This state is used during the reflow
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// of a given line, but doesn't have meaning before or after.
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nsVoidArray mPendingFloaters;
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PRBool mComputeMaxElementSize;
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nsSize mMaxElementSize;
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};
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// XXX This is vile. Make it go away
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void
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nsLineLayout::InitFloater(nsPlaceholderFrame* aFrame)
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{
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mBlockRS->InitFloater(aFrame);
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}
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void
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nsLineLayout::AddFloater(nsPlaceholderFrame* aFrame)
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{
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mBlockRS->AddFloater(aFrame, PR_FALSE);
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}
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//----------------------------------------------------------------------
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nsBlockReflowState::nsBlockReflowState(const nsHTMLReflowState& aReflowState,
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nsIPresContext& aPresContext,
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nsBlockFrame* aFrame,
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const nsHTMLReflowMetrics& aMetrics,
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nsLineLayout* aLineLayout)
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: mBlock(aFrame),
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mPresContext(aPresContext),
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mReflowState(aReflowState),
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mIsTopMarginRoot(PR_FALSE),
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mIsBottomMarginRoot(PR_FALSE),
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mApplyTopMargin(PR_FALSE),
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mNextRCFrame(nsnull),
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mPrevBottomMargin(0)
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{
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mLineLayout = aLineLayout;
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mSpaceManager = aReflowState.spaceManager;
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// Translate into our content area and then save the
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// coordinate system origin for later.
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const nsMargin& borderPadding = BorderPadding();
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mSpaceManager->Translate(borderPadding.left, borderPadding.top);
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mSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
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mReflowStatus = NS_FRAME_COMPLETE;
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mPresContext = aPresContext;
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mBlock->GetNextInFlow((nsIFrame**)&mNextInFlow);
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mKidXMost = 0;
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// Compute content area width (the content area is inside the border
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// and padding)
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mUnconstrainedWidth = PR_FALSE;
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if (NS_UNCONSTRAINEDSIZE != aReflowState.computedWidth) {
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mContentArea.width = aReflowState.computedWidth;
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}
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else {
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if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
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mContentArea.width = NS_UNCONSTRAINEDSIZE;
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mUnconstrainedWidth = PR_TRUE;
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}
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else {
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nscoord lr = borderPadding.left + borderPadding.right;
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mContentArea.width = aReflowState.availableWidth - lr;
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}
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}
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|
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// Compute content area height. Unlike the width, if we have a
|
|
// specified style height we ignore it since extra content is
|
|
// managed by the "overflow" property. When we don't have a
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|
// specified style height then we may end up limiting our height if
|
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// the availableHeight is constrained (this situation occurs when we
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// are paginated).
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mUnconstrainedHeight = PR_FALSE;
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if (NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight) {
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// We are in a paginated situation. The bottom edge is just inside
|
|
// the bottom border and padding. The content area height doesn't
|
|
// include either border or padding edge.
|
|
mBottomEdge = aReflowState.availableHeight - borderPadding.bottom;
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mContentArea.height = mBottomEdge - borderPadding.top;
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}
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else {
|
|
// When we are not in a paginated situation then we always use
|
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// an constrained height.
|
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mUnconstrainedHeight = PR_TRUE;
|
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mContentArea.height = mBottomEdge = NS_UNCONSTRAINEDSIZE;
|
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}
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|
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mY = borderPadding.top;
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mBand.Init(mSpaceManager, mContentArea);
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|
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mPrevChild = nsnull;
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mCurrentLine = nsnull;
|
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mPrevLine = nsnull;
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|
|
const nsStyleText* styleText;
|
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mBlock->GetStyleData(eStyleStruct_Text,
|
|
(const nsStyleStruct*&) styleText);
|
|
switch (styleText->mWhiteSpace) {
|
|
case NS_STYLE_WHITESPACE_PRE:
|
|
case NS_STYLE_WHITESPACE_NOWRAP:
|
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mNoWrap = PR_TRUE;
|
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break;
|
|
default:
|
|
mNoWrap = PR_FALSE;
|
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break;
|
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}
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|
|
mComputeMaxElementSize = nsnull != aMetrics.maxElementSize;;
|
|
mMaxElementSize.SizeTo(0, 0);
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|
|
if (0 != borderPadding.top) {
|
|
mIsTopMarginRoot = PR_TRUE;
|
|
}
|
|
if (0 != borderPadding.bottom) {
|
|
mIsBottomMarginRoot = PR_TRUE;
|
|
}
|
|
}
|
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|
|
nsBlockReflowState::~nsBlockReflowState()
|
|
{
|
|
// Restore the coordinate system
|
|
const nsMargin& borderPadding = BorderPadding();
|
|
mSpaceManager->Translate(-borderPadding.left, -borderPadding.top);
|
|
}
|
|
|
|
// Compute the amount of available space for reflowing a block frame
|
|
// at the current Y coordinate. This method assumes that
|
|
// GetAvailableSpace has already been called.
|
|
void
|
|
nsBlockReflowState::ComputeBlockAvailSpace(nsSplittableType aSplitType,
|
|
nsRect& aResult)
|
|
{
|
|
nscoord availHeight = mUnconstrainedHeight
|
|
? NS_UNCONSTRAINEDSIZE
|
|
: mBottomEdge - mY;
|
|
|
|
const nsMargin& borderPadding = BorderPadding();
|
|
nscoord availX, availWidth;
|
|
if (NS_FRAME_SPLITTABLE_NON_RECTANGULAR == aSplitType) {
|
|
// Frames that know how to do non-rectangular splitting are given
|
|
// the entire available space, including space consumed by
|
|
// floaters.
|
|
availX = borderPadding.left;
|
|
availWidth = mUnconstrainedWidth
|
|
? NS_UNCONSTRAINEDSIZE
|
|
: mContentArea.width;
|
|
}
|
|
else {
|
|
// Assume the frame is clueless about the space manager and only
|
|
// give it free space.
|
|
availX = mAvailSpaceRect.x + borderPadding.left;
|
|
availWidth = mAvailSpaceRect.width;
|
|
}
|
|
aResult.SetRect(availX, mY, availWidth, availHeight);
|
|
}
|
|
|
|
PRBool
|
|
nsBlockReflowState::ClearPastFloaters(PRUint8 aBreakType)
|
|
{
|
|
nscoord saveY, deltaY;
|
|
|
|
PRBool applyTopMargin = PR_FALSE;
|
|
switch (aBreakType) {
|
|
case NS_STYLE_CLEAR_LEFT:
|
|
case NS_STYLE_CLEAR_RIGHT:
|
|
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
|
|
// Apply the previous margin before clearing
|
|
saveY = mY + mPrevBottomMargin;
|
|
ClearFloaters(saveY, aBreakType);
|
|
|
|
// Determine how far we just moved. If we didn't move then there
|
|
// was nothing to clear to don't mess with the normal margin
|
|
// collapsing behavior. In either case we need to restore the Y
|
|
// coordinate to what it was before the clear.
|
|
deltaY = mY - saveY;
|
|
if (0 != deltaY) {
|
|
// Pretend that the distance we just moved is a previous
|
|
// blocks bottom margin. Note that GetAvailableSpace has been
|
|
// done so that the available space calculations will be done
|
|
// after clearing the appropriate floaters.
|
|
//
|
|
// What we are doing here is applying CSS2 section 9.5.2's
|
|
// rules for clearing - "The top margin of the generated box
|
|
// is increased enough that the top border edge is below the
|
|
// bottom outer edge of the floating boxes..."
|
|
//
|
|
// What this will do is cause the top-margin of the block
|
|
// frame we are about to reflow to be collapsed with that
|
|
// distance.
|
|
mPrevBottomMargin = deltaY;
|
|
mY = saveY;
|
|
|
|
// Force margin to be applied in this circumstance
|
|
applyTopMargin = PR_TRUE;
|
|
}
|
|
else {
|
|
// Put aState.mY back to its original value since no clearing
|
|
// happened. That way the previous blocks bottom margin will
|
|
// be applied properly.
|
|
mY = saveY - mPrevBottomMargin;
|
|
}
|
|
break;
|
|
}
|
|
return applyTopMargin;
|
|
}
|
|
|
|
// Recover the collapsed vertical margin values for aLine. Note that
|
|
// the values are not collapsed with aState.mPrevBottomMargin, nor are
|
|
// they collapsed with each other when the line height is zero.
|
|
void
|
|
nsBlockReflowState::RecoverVerticalMargins(nsLineBox* aLine,
|
|
PRBool aApplyTopMargin,
|
|
nscoord* aTopMarginResult,
|
|
nscoord* aBottomMarginResult)
|
|
{
|
|
if (aLine->IsBlock()) {
|
|
// Update band data
|
|
GetAvailableSpace();
|
|
|
|
// Setup reflow state to compute the block childs top and bottom
|
|
// margins
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
|
|
frame->IsSplittable(splitType);
|
|
nsRect availSpaceRect;
|
|
ComputeBlockAvailSpace(splitType, availSpaceRect);
|
|
nsSize availSpace(availSpaceRect.width, availSpaceRect.height);
|
|
nsHTMLReflowState reflowState(mPresContext, mReflowState,
|
|
frame, availSpace);
|
|
|
|
// Compute collapsed top margin
|
|
nscoord topMargin = 0;
|
|
if (aApplyTopMargin) {
|
|
topMargin =
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(mPresContext,
|
|
reflowState);
|
|
}
|
|
|
|
// Compute collapsed bottom margin
|
|
nscoord bottomMargin = reflowState.computedMargin.bottom;
|
|
bottomMargin =
|
|
nsBlockReflowContext::MaxMargin(bottomMargin,
|
|
aLine->mCarriedOutBottomMargin);
|
|
*aTopMarginResult = topMargin;
|
|
*aBottomMarginResult = bottomMargin;
|
|
}
|
|
else {
|
|
// XXX_ib
|
|
*aTopMarginResult = 0;
|
|
*aBottomMarginResult = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockReflowState::RecoverStateFrom(nsLineBox* aLine,
|
|
PRBool aApplyTopMargin,
|
|
nscoord aDeltaY)
|
|
{
|
|
// Make the line being recovered the current line
|
|
mCurrentLine = aLine;
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames
|
|
// in this line.
|
|
mPrevChild = aLine->LastChild();
|
|
|
|
// Recover mKidXMost
|
|
nscoord xmost = aLine->mBounds.XMost();
|
|
if (xmost > mKidXMost) {
|
|
#ifdef DEBUG
|
|
if (CRAZY_WIDTH(xmost)) {
|
|
nsFrame::ListTag(stdout, mBlock);
|
|
printf(": WARNING: xmost:%d\n", xmost);
|
|
}
|
|
#endif
|
|
mKidXMost = xmost;
|
|
}
|
|
|
|
// The line may have clear before semantics.
|
|
if (NS_STYLE_CLEAR_NONE != aLine->mBreakType) {
|
|
// Clear past floaters before the block if the clear style is not none
|
|
aApplyTopMargin = ClearPastFloaters(aLine->mBreakType);
|
|
}
|
|
|
|
// Recover mPrevBottomMargin and calculate the line's new Y
|
|
// coordinate (newLineY)
|
|
nscoord newLineY = mY;
|
|
if (0 == aLine->mBounds.height) {
|
|
if (aLine->IsBlock() &&
|
|
nsBlockReflowContext::IsHTMLParagraph(aLine->mFirstChild)) {
|
|
// Empty HTML paragraphs disappear entirely - their margins go
|
|
// to zero.
|
|
}
|
|
else {
|
|
// The line's top and bottom margin values need to be collapsed
|
|
// with the mPrevBottomMargin to determine a new
|
|
// mPrevBottomMargin value.
|
|
nscoord topMargin, bottomMargin;
|
|
RecoverVerticalMargins(aLine, aApplyTopMargin,
|
|
&topMargin, &bottomMargin);
|
|
nscoord m = nsBlockReflowContext::MaxMargin(topMargin, bottomMargin);
|
|
m = nsBlockReflowContext::MaxMargin(m, mPrevBottomMargin);
|
|
mPrevBottomMargin = m;
|
|
}
|
|
}
|
|
else {
|
|
// Recover the top and bottom marings for this line
|
|
nscoord topMargin, bottomMargin;
|
|
RecoverVerticalMargins(aLine, aApplyTopMargin,
|
|
&topMargin, &bottomMargin);
|
|
|
|
// Compute the collapsed top margin value
|
|
nscoord collapsedTopMargin =
|
|
nsBlockReflowContext::MaxMargin(topMargin, mPrevBottomMargin);
|
|
|
|
// The lineY is just below the collapsed top margin value. The
|
|
// mPrevBottomMargin gets set to the bottom margin value for the
|
|
// line.
|
|
newLineY += collapsedTopMargin;
|
|
mPrevBottomMargin = bottomMargin;
|
|
}
|
|
nscoord finalDeltaY = newLineY - aLine->mBounds.y;
|
|
if (0 != finalDeltaY) {
|
|
// Slide the frames in the line by the computed delta. This also
|
|
// updates the lines Y coordinate and the combined area's Y
|
|
// coordinate.
|
|
mBlock->SlideLine(mPresContext, mSpaceManager, aLine, finalDeltaY);
|
|
}
|
|
|
|
// Now that the line's Y coordinate is updated, place floaters back
|
|
// into the space manager
|
|
if (nsnull != aLine->mFloaters) {
|
|
mY = aLine->mBounds.y;
|
|
if (0 == aLine->mBounds.height) {
|
|
mY += mPrevBottomMargin;
|
|
}
|
|
PlaceCurrentLineFloaters(aLine->mFloaters);
|
|
mY = aLine->mBounds.YMost();
|
|
PlaceBelowCurrentLineFloaters(aLine->mFloaters, PR_FALSE);
|
|
}
|
|
|
|
// XXX Recover floater combined area
|
|
// XXX not necessary at the moment because
|
|
// PlaceCurrentLineFloaters and PlaceBelowCurrentLineFloaters
|
|
// always reflow the floaters...
|
|
|
|
// Recover mY
|
|
mY = aLine->mBounds.YMost();
|
|
|
|
// It's possible that the line has clear after semantics
|
|
if (!aLine->IsBlock() && (NS_STYLE_CLEAR_NONE != aLine->mBreakType)) {
|
|
switch (aLine->mBreakType) {
|
|
case NS_STYLE_CLEAR_LEFT:
|
|
case NS_STYLE_CLEAR_RIGHT:
|
|
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
|
|
ClearFloaters(mY, aLine->mBreakType);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
|
|
|
|
nsresult
|
|
NS_NewBlockFrame(nsIFrame*& aNewFrame, PRUint32 aFlags)
|
|
{
|
|
nsBlockFrame* it = new nsBlockFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
it->SetFlags(aFlags);
|
|
aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsBlockFrame::nsBlockFrame()
|
|
{
|
|
}
|
|
|
|
nsBlockFrame::~nsBlockFrame()
|
|
{
|
|
NS_IF_RELEASE(mFirstLineStyle);
|
|
NS_IF_RELEASE(mFirstLetterStyle);
|
|
nsTextRun::DeleteTextRuns(mTextRuns);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::DeleteFrame(nsIPresContext& aPresContext)
|
|
{
|
|
// Outside bullets are not in our child-list so check for them here
|
|
// and delete them when present.
|
|
if (HaveOutsideBullet()) {
|
|
mBullet->DeleteFrame(aPresContext);
|
|
mBullet = nsnull;
|
|
}
|
|
|
|
nsLineBox::DeleteLineList(aPresContext, mLines);
|
|
nsLineBox::DeleteLineList(aPresContext, mOverflowLines);
|
|
|
|
mFloaters.DeleteFrames(aPresContext);
|
|
|
|
return nsBlockFrameSuper::DeleteFrame(aPresContext);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
|
|
{
|
|
if (NULL == aInstancePtr) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
if (aIID.Equals(kBlockFrameCID)) {
|
|
nsBlockFrame* tmp = this;
|
|
*aInstancePtr = (void*) tmp;
|
|
return NS_OK;
|
|
}
|
|
return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
|
|
}
|
|
|
|
static nsresult
|
|
ReResolveLineList(nsIPresContext* aPresContext,
|
|
nsLineBox* aLine,
|
|
nsIStyleContext* aStyleContext,
|
|
PRInt32 aParentChange,
|
|
nsStyleChangeList* aChangeList)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
PRInt32 childChange;
|
|
while (nsnull != aLine) {
|
|
nsIFrame* child = aLine->mFirstChild;
|
|
PRInt32 n = aLine->mChildCount;
|
|
while ((--n >= 0) && NS_SUCCEEDED(rv)) {
|
|
rv = child->ReResolveStyleContext(aPresContext, aStyleContext,
|
|
aParentChange, aChangeList, &childChange);
|
|
child->GetNextSibling(&child);
|
|
}
|
|
aLine = aLine->mNext;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::ReResolveStyleContext(nsIPresContext* aPresContext,
|
|
nsIStyleContext* aParentContext,
|
|
PRInt32 aParentChange,
|
|
nsStyleChangeList* aChangeList,
|
|
PRInt32* aLocalChange)
|
|
{
|
|
// NOTE: using nsFrame's ReResolveStyleContext method to avoid
|
|
// useless version in base classes.
|
|
PRInt32 ourChange = aParentChange;
|
|
nsresult rv = nsFrame::ReResolveStyleContext(aPresContext, aParentContext,
|
|
ourChange, aChangeList, &ourChange);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (NS_COMFALSE != rv) {
|
|
// Re-resolve the :first-line pseudo style context
|
|
if (nsnull == mPrevInFlow) {
|
|
nsIStyleContext* newFirstLineStyle;
|
|
aPresContext->ProbePseudoStyleContextFor(mContent,
|
|
nsHTMLAtoms::firstLinePseudo,
|
|
mStyleContext,
|
|
PR_FALSE,
|
|
&newFirstLineStyle);
|
|
if (newFirstLineStyle != mFirstLineStyle) {
|
|
CaptureStyleChangeFor(this, mFirstLineStyle, newFirstLineStyle,
|
|
ourChange, aChangeList, &ourChange);
|
|
NS_IF_RELEASE(mFirstLineStyle);
|
|
mFirstLineStyle = newFirstLineStyle;
|
|
}
|
|
else {
|
|
NS_IF_RELEASE(newFirstLineStyle);
|
|
}
|
|
|
|
// Re-resolve the :first-letter pseudo style context
|
|
nsIStyleContext* newFirstLetterStyle;
|
|
aPresContext->ProbePseudoStyleContextFor(mContent,
|
|
nsHTMLAtoms::firstLetterPseudo,
|
|
(nsnull != mFirstLineStyle
|
|
? mFirstLineStyle
|
|
: mStyleContext),
|
|
PR_FALSE,
|
|
&newFirstLetterStyle);
|
|
if (newFirstLetterStyle != mFirstLetterStyle) {
|
|
CaptureStyleChangeFor(this, mFirstLetterStyle, newFirstLetterStyle,
|
|
ourChange, aChangeList, &ourChange);
|
|
NS_IF_RELEASE(mFirstLetterStyle);
|
|
mFirstLetterStyle = newFirstLetterStyle;
|
|
}
|
|
else {
|
|
NS_IF_RELEASE(newFirstLetterStyle);
|
|
}
|
|
}
|
|
|
|
// XXX Need to check if the bullet is inside and hence
|
|
// in the line list. If so, we don't need to do this.
|
|
if (NS_SUCCEEDED(rv) && (nsnull != mBullet)) {
|
|
nsIStyleContext* newBulletSC;
|
|
nsIStyleContext* oldBulletSC = nsnull;
|
|
mBullet->GetStyleContext(&oldBulletSC);
|
|
aPresContext->ResolvePseudoStyleContextFor(mContent,
|
|
nsHTMLAtoms::mozListBulletPseudo,
|
|
mStyleContext,
|
|
PR_FALSE, &newBulletSC);
|
|
rv = mBullet->SetStyleContext(aPresContext, newBulletSC);
|
|
CaptureStyleChangeFor(this, oldBulletSC, newBulletSC,
|
|
ourChange, aChangeList, &ourChange);
|
|
NS_RELEASE(oldBulletSC);
|
|
NS_RELEASE(newBulletSC);
|
|
}
|
|
|
|
if (aLocalChange) {
|
|
*aLocalChange = ourChange;
|
|
}
|
|
|
|
// Update the child frames on each line
|
|
nsLineBox* line = mLines;
|
|
PRInt32 childChange;
|
|
while (nsnull != line) {
|
|
nsIFrame* child = line->mFirstChild;
|
|
PRInt32 n = line->mChildCount;
|
|
while ((--n >= 0) && NS_SUCCEEDED(rv)) {
|
|
if (line == mLines) {
|
|
rv = child->ReResolveStyleContext(aPresContext,
|
|
(nsnull != mFirstLineStyle
|
|
? mFirstLineStyle
|
|
: mStyleContext),
|
|
ourChange,
|
|
aChangeList, &childChange);
|
|
}
|
|
else {
|
|
rv = child->ReResolveStyleContext(aPresContext, mStyleContext,
|
|
ourChange, aChangeList, &childChange);
|
|
}
|
|
child->GetNextSibling(&child);
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv) && (nsnull != mOverflowLines)) {
|
|
rv = ReResolveLineList(aPresContext, mOverflowLines, mStyleContext,
|
|
ourChange, aChangeList);
|
|
}
|
|
if (NS_SUCCEEDED(rv) && (nsnull != mPrevInFlow)) {
|
|
nsLineBox* lines = ((nsBlockFrame*)mPrevInFlow)->mOverflowLines;
|
|
if (nsnull != lines) {
|
|
rv = ReResolveLineList(aPresContext, lines, mStyleContext,
|
|
ourChange, aChangeList);
|
|
}
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
|
|
{
|
|
aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
|
|
return NS_OK;
|
|
}
|
|
|
|
static void
|
|
ListTextRuns(FILE* out, PRInt32 aIndent, nsTextRun* aRuns)
|
|
{
|
|
while (nsnull != aRuns) {
|
|
aRuns->List(out, aIndent);
|
|
aRuns = aRuns->GetNext();
|
|
}
|
|
}
|
|
|
|
NS_METHOD
|
|
nsBlockFrame::List(FILE* out, PRInt32 aIndent) const
|
|
{
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
nsIView* view;
|
|
GetView(&view);
|
|
if (nsnull != view) {
|
|
fprintf(out, " [view=%p]", view);
|
|
}
|
|
|
|
// Output the flow linkage
|
|
if (nsnull != mPrevInFlow) {
|
|
fprintf(out, " prev-in-flow=%p", mPrevInFlow);
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
fprintf(out, " next-in-flow=%p", mNextInFlow);
|
|
}
|
|
|
|
// Output the rect and state
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
fprintf(out, " [state=%08x]", mState);
|
|
}
|
|
if (0 != mFlags) {
|
|
fprintf(out, " [flags=%x]", mFlags);
|
|
}
|
|
fputs("<\n", out);
|
|
aIndent++;
|
|
|
|
// Output the lines
|
|
if (nsnull != mLines) {
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
line->List(out, aIndent);
|
|
line = line->mNext;
|
|
}
|
|
}
|
|
|
|
nsIAtom* listName = nsnull;
|
|
PRInt32 listIndex = 0;
|
|
for (;;) {
|
|
nsIFrame* kid;
|
|
GetAdditionalChildListName(listIndex++, &listName);
|
|
if (nsnull == listName) {
|
|
break;
|
|
}
|
|
FirstChild(listName, &kid);
|
|
if (nsnull != kid) {
|
|
IndentBy(out, aIndent);
|
|
nsAutoString tmp;
|
|
if (nsnull != listName) {
|
|
listName->ToString(tmp);
|
|
fputs(tmp, out);
|
|
}
|
|
fputs("<\n", out);
|
|
while (nsnull != kid) {
|
|
kid->List(out, aIndent + 1);
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
}
|
|
NS_IF_RELEASE(listName);
|
|
}
|
|
|
|
// Output the text-runs
|
|
if (nsnull != mTextRuns) {
|
|
IndentBy(out, aIndent);
|
|
fputs("text-runs <\n", out);
|
|
|
|
ListTextRuns(out, aIndent + 1, mTextRuns);
|
|
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
}
|
|
|
|
aIndent--;
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetFrameName(nsString& aResult) const
|
|
{
|
|
return MakeFrameName("Block", aResult);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetFrameType(nsIAtom** aType) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
|
|
*aType = nsHTMLAtoms::blockFrame;
|
|
NS_ADDREF(*aType);
|
|
return NS_OK;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Child frame enumeration
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::FirstChild(nsIAtom* aListName, nsIFrame** aFirstChild) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aFirstChild, "null OUT parameter pointer");
|
|
if (nsnull == aListName) {
|
|
*aFirstChild = (nsnull != mLines) ? mLines->mFirstChild : nsnull;
|
|
return NS_OK;
|
|
}
|
|
else if (aListName == nsLayoutAtoms::floaterList) {
|
|
*aFirstChild = mFloaters.FirstChild();
|
|
return NS_OK;
|
|
}
|
|
else if (aListName == nsLayoutAtoms::bulletList) {
|
|
*aFirstChild = mBullet;
|
|
return NS_OK;
|
|
}
|
|
*aFirstChild = nsnull;
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetAdditionalChildListName(PRInt32 aIndex,
|
|
nsIAtom** aListName) const
|
|
{
|
|
NS_PRECONDITION(nsnull != aListName, "null OUT parameter pointer");
|
|
if (aIndex < 0) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
*aListName = nsnull;
|
|
switch (aIndex) {
|
|
case NS_BLOCK_FRAME_FLOATER_LIST_INDEX:
|
|
*aListName = nsLayoutAtoms::floaterList;
|
|
NS_ADDREF(*aListName);
|
|
break;
|
|
case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
|
|
*aListName = nsLayoutAtoms::bulletList;
|
|
NS_ADDREF(*aListName);
|
|
break;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::IsPercentageBase(PRBool& aBase) const
|
|
{
|
|
aBase = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame structure methods
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Reflow methods
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Reflow(nsIPresContext& aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
nsLineLayout lineLayout(aPresContext, aReflowState.spaceManager,
|
|
&aReflowState, nsnull != aMetrics.maxElementSize);
|
|
nsBlockReflowState state(aReflowState, aPresContext, this, aMetrics,
|
|
&lineLayout);
|
|
lineLayout.Init(&state);
|
|
if (NS_BLOCK_MARGIN_ROOT & mFlags) {
|
|
state.mIsTopMarginRoot = PR_TRUE;
|
|
state.mIsBottomMarginRoot = PR_TRUE;
|
|
}
|
|
if (state.mIsTopMarginRoot) {
|
|
state.mApplyTopMargin = PR_TRUE;
|
|
}
|
|
|
|
if (eReflowReason_Resize != aReflowState.reason) {
|
|
RenumberLists();
|
|
ComputeTextRuns(aPresContext);
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
nsIFrame* target;
|
|
switch (aReflowState.reason) {
|
|
case eReflowReason_Initial:
|
|
DrainOverflowLines();
|
|
rv = PrepareInitialReflow(state);
|
|
mState &= ~NS_FRAME_FIRST_REFLOW;
|
|
break;
|
|
|
|
case eReflowReason_Incremental:
|
|
aReflowState.reflowCommand->GetTarget(target);
|
|
if (this == target) {
|
|
nsIReflowCommand::ReflowType type;
|
|
aReflowState.reflowCommand->GetType(type);
|
|
switch (type) {
|
|
case nsIReflowCommand::FrameAppended:
|
|
case nsIReflowCommand::FrameInserted:
|
|
case nsIReflowCommand::FrameRemoved:
|
|
break;
|
|
case nsIReflowCommand::StyleChanged:
|
|
rv = PrepareStyleChangedReflow(state);
|
|
break;
|
|
case nsIReflowCommand::ReflowDirty:
|
|
break;
|
|
default:
|
|
// Map any other incremental operations into full reflows
|
|
rv = PrepareResizeReflow(state);
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
// Get next frame in reflow command chain
|
|
aReflowState.reflowCommand->GetNext(state.mNextRCFrame);
|
|
|
|
// Now do the reflow
|
|
rv = PrepareChildIncrementalReflow(state);
|
|
}
|
|
break;
|
|
|
|
case eReflowReason_Resize:
|
|
default:
|
|
DrainOverflowLines();
|
|
rv = PrepareResizeReflow(state);
|
|
break;
|
|
}
|
|
|
|
// Now reflow...
|
|
rv = ReflowDirtyLines(state);
|
|
aStatus = state.mReflowStatus;
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
|
|
if (NS_STYLE_OVERFLOW_HIDDEN == aReflowState.mStyleDisplay->mOverflow) {
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
else {
|
|
#ifdef DEBUG_kipp
|
|
ListTag(stdout); printf(": block is not complete\n");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// XXX_pref get rid of this!
|
|
BuildFloaterList();
|
|
|
|
// Compute our final size
|
|
ComputeFinalSize(aReflowState, state, aMetrics);
|
|
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": availSize=%d,%d computed=%d,%d metrics=%d,%d carriedMargin=%d\n",
|
|
aReflowState.availableWidth, aReflowState.availableHeight,
|
|
aReflowState.computedWidth, aReflowState.computedHeight,
|
|
aMetrics.width, aMetrics.height,
|
|
aMetrics.mCarriedOutBottomMargin);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeFinalSize(const nsHTMLReflowState& aReflowState,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
const nsMargin& borderPadding = aState.BorderPadding();
|
|
|
|
// Special check for zero sized content: If our content is zero
|
|
// sized then we collapse into nothingness.
|
|
//
|
|
// Consensus after discussion with a few CSS folks is that html's
|
|
// notion of collapsing <P>'s should take precedence over non
|
|
// auto-sided block elements. Therefore we don't honor the width,
|
|
// height, border or padding attributes (the parent has to not apply
|
|
// a margin for us also).
|
|
//
|
|
// Note that this is <b>only</b> done for html paragraphs. Its not
|
|
// appropriate to apply it to other containers, especially XML
|
|
// content!
|
|
PRBool isHTMLParagraph = 0 != (mState & NS_BLOCK_IS_HTML_PARAGRAPH);
|
|
if (isHTMLParagraph &&
|
|
(aReflowState.mStyleDisplay->mDisplay == NS_STYLE_DISPLAY_BLOCK) &&
|
|
(((0 == aState.mKidXMost) ||
|
|
(0 == aState.mKidXMost - borderPadding.left)) &&
|
|
(0 == aState.mY - borderPadding.top))) {
|
|
// Zero out the works
|
|
aMetrics.width = 0;
|
|
aMetrics.height = 0;
|
|
aMetrics.ascent = 0;
|
|
aMetrics.descent = 0;
|
|
aMetrics.mCarriedOutBottomMargin = 0;
|
|
if (nsnull != aMetrics.maxElementSize) {
|
|
aMetrics.maxElementSize->width = 0;
|
|
aMetrics.maxElementSize->height = 0;
|
|
}
|
|
}
|
|
else {
|
|
// Compute final width
|
|
nscoord maxWidth = 0, maxHeight = 0;
|
|
nscoord minWidth = aState.mKidXMost + borderPadding.right;
|
|
if (!aState.mUnconstrainedWidth && aReflowState.HaveFixedContentWidth()) {
|
|
// Use style defined width
|
|
aMetrics.width = borderPadding.left + aReflowState.computedWidth +
|
|
borderPadding.right;
|
|
// XXX quote css1 section here
|
|
if ((0 == aReflowState.computedWidth) && (aMetrics.width < minWidth)) {
|
|
aMetrics.width = minWidth;
|
|
}
|
|
|
|
// When style defines the width use it for the max-element-size
|
|
// because we can't shrink any smaller.
|
|
maxWidth = aMetrics.width;
|
|
}
|
|
else {
|
|
nscoord computedWidth = minWidth;
|
|
PRBool compact = PR_FALSE;
|
|
#if 0
|
|
if (NS_STYLE_DISPLAY_COMPACT == aReflowState.mStyleDisplay->mDisplay) {
|
|
// If we are display: compact AND we have no lines or we have
|
|
// exactly one line and that line is not a block line AND that
|
|
// line doesn't end in a BR of any sort THEN we remain a compact
|
|
// frame.
|
|
if ((nsnull == mLines) ||
|
|
((nsnull == mLines->mNext) && !mLines->IsBlock() &&
|
|
(NS_STYLE_CLEAR_NONE == mLines->mBreakType)
|
|
/*XXX && (computedWidth <= aState.mCompactMarginWidth) */
|
|
)) {
|
|
compact = PR_TRUE;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// There are two options here. We either shrink wrap around our
|
|
// contents or we fluff out to the maximum block width. Note:
|
|
// We always shrink wrap when given an unconstrained width.
|
|
if ((0 == (NS_BLOCK_SHRINK_WRAP & mFlags)) &&
|
|
!aState.mUnconstrainedWidth &&
|
|
!compact) {
|
|
// Set our width to the max width if we aren't already that
|
|
// wide. Note that the max-width has nothing to do with our
|
|
// contents (CSS2 section XXX)
|
|
nscoord maxWidth = borderPadding.left + aState.mContentArea.width +
|
|
borderPadding.right;
|
|
computedWidth = maxWidth;
|
|
}
|
|
else if (aState.mComputeMaxElementSize) {
|
|
if (aState.mNoWrap) {
|
|
// When no-wrap is true the max-element-size.width is the
|
|
// width of the widest line plus the right border. Note that
|
|
// aState.mKidXMost already has the left border factored in
|
|
maxWidth = aState.mKidXMost + borderPadding.right;
|
|
}
|
|
else {
|
|
// Add in border and padding dimensions to already computed
|
|
// max-element-size values.
|
|
maxWidth = aState.mMaxElementSize.width +
|
|
borderPadding.left + borderPadding.right;
|
|
}
|
|
|
|
// See if our max-element-size width is larger than our
|
|
// computed-width. This happens when we are impacted by a
|
|
// floater. When this does happen, our desired size needs to
|
|
// include room for the floater.
|
|
if (computedWidth < maxWidth) {
|
|
#ifdef DEBUG_kipp
|
|
ListTag(stdout);
|
|
printf(": adjusting width from %d to %d\n", computedWidth,
|
|
maxWidth);
|
|
#endif
|
|
computedWidth = maxWidth;
|
|
}
|
|
}
|
|
|
|
// Apply min/max values
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxWidth) {
|
|
nscoord computedMaxWidth = aReflowState.mComputedMaxWidth +
|
|
borderPadding.left + borderPadding.right;
|
|
if (computedWidth > computedMaxWidth) {
|
|
computedWidth = aReflowState.mComputedMaxWidth;
|
|
}
|
|
}
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinWidth) {
|
|
nscoord computedMinWidth = aReflowState.mComputedMinWidth +
|
|
borderPadding.left + borderPadding.right;
|
|
if (computedWidth < computedMinWidth) {
|
|
computedWidth = computedMinWidth;
|
|
}
|
|
}
|
|
aMetrics.width = computedWidth;
|
|
}
|
|
|
|
// Compute final height
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.computedHeight) {
|
|
// Use style defined height
|
|
aMetrics.height = borderPadding.top + aReflowState.computedHeight +
|
|
borderPadding.bottom;
|
|
|
|
// When style defines the height use it for the max-element-size
|
|
// because we can't shrink any smaller.
|
|
maxHeight = aMetrics.height;
|
|
}
|
|
else {
|
|
nscoord autoHeight = aState.mY;
|
|
|
|
// Shrink wrap our height around our contents.
|
|
if (aState.mIsBottomMarginRoot) {
|
|
// When we are a bottom-margin root make sure that our last
|
|
// childs bottom margin is fully applied.
|
|
// XXX check for a fit
|
|
autoHeight += aState.mPrevBottomMargin;
|
|
}
|
|
autoHeight += borderPadding.bottom;
|
|
|
|
// Apply min/max values
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMaxHeight) {
|
|
nscoord computedMaxHeight = aReflowState.mComputedMaxHeight +
|
|
borderPadding.top + borderPadding.bottom;
|
|
if (autoHeight > computedMaxHeight) {
|
|
autoHeight = computedMaxHeight;
|
|
}
|
|
}
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedMinHeight) {
|
|
nscoord computedMinHeight = aReflowState.mComputedMinHeight +
|
|
borderPadding.top + borderPadding.bottom;
|
|
if (autoHeight < computedMinHeight) {
|
|
autoHeight = computedMinHeight;
|
|
}
|
|
}
|
|
aMetrics.height = autoHeight;
|
|
|
|
if (aState.mComputeMaxElementSize) {
|
|
maxHeight = aState.mMaxElementSize.height +
|
|
borderPadding.top + borderPadding.bottom;
|
|
}
|
|
}
|
|
|
|
aMetrics.ascent = aMetrics.height;
|
|
aMetrics.descent = 0;
|
|
if (aState.mComputeMaxElementSize) {
|
|
// Store away the final value
|
|
aMetrics.maxElementSize->width = maxWidth;
|
|
aMetrics.maxElementSize->height = maxHeight;
|
|
}
|
|
|
|
// Return bottom margin information
|
|
aMetrics.mCarriedOutBottomMargin =
|
|
aState.mIsBottomMarginRoot ? 0 : aState.mPrevBottomMargin;
|
|
|
|
#ifdef DEBUG
|
|
if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
|
|
}
|
|
if (aState.mComputeMaxElementSize &&
|
|
((maxWidth > aMetrics.width) || (maxHeight > aMetrics.height))) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
|
|
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
|
|
aState.mReflowState.availableWidth,
|
|
aState.mReflowState.availableHeight);
|
|
}
|
|
#endif
|
|
#ifdef NOISY_MAX_ELEMENT_SIZE
|
|
if (aState.mComputeMaxElementSize) {
|
|
IndentBy(stdout, GetDepth());
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
|
|
printf("PASS1 ");
|
|
}
|
|
ListTag(stdout);
|
|
printf(": max-element-size:%d,%d desired:%d,%d maxSize:%d,%d\n",
|
|
maxWidth, maxHeight, aMetrics.width, aMetrics.height,
|
|
aState.mReflowState.availableWidth,
|
|
aState.mReflowState.availableHeight);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// Compute the combined area of our children
|
|
// XXX take into account the overflow->clip property!
|
|
// XXX_perf: This can be done incrementally
|
|
nscoord x0 = 0, y0 = 0, x1 = aMetrics.width, y1 = aMetrics.height;
|
|
if ((0 != aMetrics.height) || mFloaters.NotEmpty()) {
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
// Compute min and max x/y values for the reflowed frame's
|
|
// combined areas
|
|
nscoord x = line->mCombinedArea.x;
|
|
nscoord y = line->mCombinedArea.y;
|
|
nscoord xmost = x + line->mCombinedArea.width;
|
|
nscoord ymost = y + line->mCombinedArea.height;
|
|
if (x < x0) {
|
|
x0 = x;
|
|
}
|
|
if (xmost > x1) {
|
|
x1 = xmost;
|
|
}
|
|
if (y < y0) {
|
|
y0 = y;
|
|
}
|
|
if (ymost > y1) {
|
|
y1 = ymost;
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
}
|
|
#ifdef NOISY_COMBINED_AREA
|
|
IndentBy(stdout, GetDepth());
|
|
ListTag(stdout);
|
|
printf(": ca=%d,%d,%d,%d\n", x0, y0, x1-x0, y1-y0);
|
|
#endif
|
|
|
|
// If the combined area of our children exceeds our bounding box
|
|
// then set the NS_FRAME_OUTSIDE_CHILDREN flag, otherwise clear it.
|
|
aMetrics.mCombinedArea.x = x0;
|
|
aMetrics.mCombinedArea.y = y0;
|
|
aMetrics.mCombinedArea.width = x1 - x0;
|
|
aMetrics.mCombinedArea.height = y1 - y0;
|
|
if ((aMetrics.mCombinedArea.x < 0) ||
|
|
(aMetrics.mCombinedArea.y < 0) ||
|
|
(aMetrics.mCombinedArea.XMost() > aMetrics.width) ||
|
|
(aMetrics.mCombinedArea.YMost() > aMetrics.height)) {
|
|
mState |= NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
else {
|
|
mState &= ~NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
|
|
{
|
|
PrepareResizeReflow(aState);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
|
|
{
|
|
// If by chance we are inside a table, then give up and reflow
|
|
// everything because we don't cache max-element-size information in
|
|
// the lines.
|
|
if (aState.mComputeMaxElementSize) {
|
|
return PrepareResizeReflow(aState);
|
|
}
|
|
|
|
// Determine the line being impacted
|
|
PRBool isFloater;
|
|
nsLineBox* line = FindLineFor(aState.mNextRCFrame, isFloater);
|
|
if (nsnull == line) {
|
|
// This can't happen, but just in case it does...
|
|
return PrepareResizeReflow(aState);
|
|
}
|
|
|
|
// XXX: temporary: If the child frame is a floater then punt
|
|
if (isFloater) {
|
|
return PrepareResizeReflow(aState);
|
|
}
|
|
|
|
// XXX need code for run-in/compact
|
|
|
|
// Mark (at least) the affected line dirty.
|
|
line->MarkDirty();
|
|
if (aState.mNoWrap || line->IsBlock()) {
|
|
// If we aren't wrapping then we know for certain that any changes
|
|
// to a childs reflow can't affect the line that follows. This is
|
|
// also true if the line is a block line.
|
|
}
|
|
else {
|
|
// XXX: temporary: For now we are conservative and mark this line
|
|
// and any inline lines that follow it dirty.
|
|
line = line->mNext;
|
|
while (nsnull != line) {
|
|
if (line->IsBlock()) {
|
|
break;
|
|
}
|
|
line->MarkDirty();
|
|
line = line->mNext;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::UpdateBulletPosition()
|
|
{
|
|
if (nsnull == mBullet) {
|
|
// Don't bother if there is no bullet
|
|
return;
|
|
}
|
|
const nsStyleList* styleList;
|
|
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
|
|
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
|
|
if (HaveOutsideBullet()) {
|
|
// We now have an inside bullet, but used to have an outside
|
|
// bullet. Adjust the frame lists and mark the first line
|
|
// dirty.
|
|
if (nsnull != mLines) {
|
|
mBullet->SetNextSibling(mLines->mFirstChild);
|
|
mLines->mFirstChild = mBullet;
|
|
mLines->mChildCount++;
|
|
mLines->MarkDirty();
|
|
}
|
|
}
|
|
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
else {
|
|
if (!HaveOutsideBullet()) {
|
|
// We now have an outside bullet, but used to have an inside
|
|
// bullet. Take the bullet frame out of the first lines frame
|
|
// list.
|
|
if ((nsnull != mLines) && (mBullet == mLines->mFirstChild)) {
|
|
nsIFrame* next;
|
|
mBullet->GetNextSibling(&next);
|
|
mBullet->SetNextSibling(nsnull);
|
|
if (--mLines->mChildCount == 0) {
|
|
nsLineBox* nextLine = mLines->mNext;
|
|
delete mLines;
|
|
mLines = nextLine;
|
|
if (nsnull != nextLine) {
|
|
nextLine->MarkDirty();
|
|
}
|
|
}
|
|
else {
|
|
mLines->mFirstChild = next;
|
|
mLines->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
|
|
{
|
|
UpdateBulletPosition();
|
|
// XXX temporary
|
|
return PrepareResizeReflow(aState);
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
|
|
{
|
|
// Mark everything dirty
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
line->MarkDirty();
|
|
line = line->mNext;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
nsLineBox*
|
|
nsBlockFrame::FindLineFor(nsIFrame* aFrame, PRBool& aIsFloaterResult)
|
|
{
|
|
aIsFloaterResult = PR_FALSE;
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
if (line->Contains(aFrame)) {
|
|
return line;
|
|
}
|
|
if (nsnull != line->mFloaters) {
|
|
nsVoidArray& a = *line->mFloaters;
|
|
PRInt32 i, n = a.Count();
|
|
for (i = 0; i < n; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) a[i];
|
|
if (aFrame == ph->GetAnchoredItem()) {
|
|
aIsFloaterResult = PR_TRUE;
|
|
return line;
|
|
}
|
|
}
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
return line;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RecoverStateFrom(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaY)
|
|
{
|
|
PRBool applyTopMargin = PR_FALSE;
|
|
if (aLine->IsBlock()) {
|
|
nsIFrame* framePrevInFlow;
|
|
aLine->mFirstChild->GetPrevInFlow(&framePrevInFlow);
|
|
if (nsnull == framePrevInFlow) {
|
|
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
|
|
}
|
|
}
|
|
|
|
aState.RecoverStateFrom(aLine, applyTopMargin, aDeltaY);
|
|
}
|
|
|
|
/**
|
|
* Propogate reflow "damage" from the just reflowed line (aLine) to
|
|
* any subsequent lines that were affected. The only thing that causes
|
|
* damage is a change to the impact that floaters make.
|
|
*/
|
|
void
|
|
nsBlockFrame::PropogateReflowDamage(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaY)
|
|
{
|
|
if (aLine->mCombinedArea.YMost() > aLine->mBounds.YMost()) {
|
|
// The line has an object that extends outside of its bounding box.
|
|
nscoord impactY0 = aLine->mCombinedArea.y;
|
|
nscoord impactY1 = aLine->mCombinedArea.YMost();
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("impactY0=%d impactY1=%d deltaY=%d\n",
|
|
impactY0, impactY1, aDeltaY);
|
|
}
|
|
#endif
|
|
|
|
// XXX Because we don't know what it is (it might be a floater; it
|
|
// might be something that is just relatively positioned) we
|
|
// *assume* that it's a floater and that lines that follow will
|
|
// need reflowing.
|
|
|
|
// Note: we cannot stop after the first non-intersecting line
|
|
// because lines might be overlapping because of negative margins.
|
|
nsLineBox* next = aLine->mNext;
|
|
while (nsnull != next) {
|
|
nscoord lineY0 = next->mBounds.y + aDeltaY;
|
|
nscoord lineY1 = lineY0 + next->mBounds.height;
|
|
if ((lineY0 < impactY1) && (impactY0 < lineY1)) {
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line=%p setting dirty\n", next);
|
|
}
|
|
#endif
|
|
next->MarkDirty();
|
|
}
|
|
next = next->mNext;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reflow the dirty lines
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
PRBool keepGoing = PR_TRUE;
|
|
|
|
// Inform line layout of where the text runs are
|
|
aState.mLineLayout->SetReflowTextRuns(mTextRuns);
|
|
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
nsIReflowCommand::ReflowType type;
|
|
aState.mReflowState.reflowCommand->GetType(type);
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": incrementally reflowing dirty lines: type=%s(%d)\n",
|
|
kReflowCommandType[type], type);
|
|
gNoiseIndent++;
|
|
}
|
|
#endif
|
|
|
|
// Reflow the lines that are already ours
|
|
aState.mPrevLine = nsnull;
|
|
nsLineBox* line = mLines;
|
|
nscoord deltaY = 0;
|
|
while (nsnull != line) {
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line=%p mY=%d dirty=%s oldBounds=%d,%d,%d,%d deltaY=%d\n",
|
|
line, aState.mY, line->IsDirty() ? "yes" : "no",
|
|
line->mBounds.x, line->mBounds.y,
|
|
line->mBounds.width, line->mBounds.height,
|
|
deltaY);
|
|
gNoiseIndent++;
|
|
}
|
|
#endif
|
|
if (line->IsDirty()) {
|
|
// Compute the dirty lines "before" YMost, after factoring in
|
|
// the running deltaY value - the running value is implicit in
|
|
// aState.mY.
|
|
nscoord oldHeight = line->mBounds.height;
|
|
|
|
// Reflow the dirty line
|
|
rv = ReflowLine(aState, line, &keepGoing);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
DidReflowLine(aState, line, keepGoing);
|
|
if (!keepGoing) {
|
|
if (0 == line->ChildCount()) {
|
|
DeleteLine(aState, line);
|
|
}
|
|
break;
|
|
}
|
|
nscoord newHeight = line->mBounds.height;
|
|
deltaY += newHeight - oldHeight;
|
|
|
|
// If the next line is clean then check and see if reflowing the
|
|
// current line "damaged" the next line. Damage occurs when the
|
|
// current line contains floaters that intrude upon the
|
|
// subsequent lines.
|
|
nsLineBox* next = line->mNext;
|
|
if ((nsnull != next) && !next->IsDirty()) {
|
|
PropogateReflowDamage(aState, line, deltaY);
|
|
}
|
|
}
|
|
else {
|
|
// XXX what if the slid line doesn't fit because we are in a
|
|
// vertically constrained situation?
|
|
// Recover state as if we reflowed this line
|
|
RecoverStateFrom(aState, line, deltaY);
|
|
}
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
gNoiseIndent--;
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("line=%p mY=%d newBounds=%d,%d,%d,%d deltaY=%d\n",
|
|
line, aState.mY,
|
|
line->mBounds.x, line->mBounds.y,
|
|
line->mBounds.width, line->mBounds.height,
|
|
deltaY);
|
|
}
|
|
#endif
|
|
|
|
// If this is an inline frame then its time to stop
|
|
aState.mPrevLine = line;
|
|
line = line->mNext;
|
|
aState.mLineLayout->AdvanceToNextLine();
|
|
}
|
|
|
|
// Pull data from a next-in-flow if we can
|
|
while (keepGoing && (nsnull != aState.mNextInFlow)) {
|
|
// Grab first line from our next-in-flow
|
|
line = aState.mNextInFlow->mLines;
|
|
if (nsnull == line) {
|
|
aState.mNextInFlow = (nsBlockFrame*) aState.mNextInFlow->mNextInFlow;
|
|
continue;
|
|
}
|
|
// XXX See if the line is not dirty; if it's not maybe we can
|
|
// avoid the pullup if it can't fit?
|
|
aState.mNextInFlow->mLines = line->mNext;
|
|
line->mNext = nsnull;
|
|
if (0 == line->ChildCount()) {
|
|
// The line is empty. Try the next one.
|
|
NS_ASSERTION(nsnull == line->mFirstChild, "bad empty line");
|
|
delete line;
|
|
continue;
|
|
}
|
|
|
|
// XXX move to a subroutine: run-in, overflow, pullframe and this do this
|
|
// Make the children in the line ours.
|
|
nsIFrame* frame = line->mFirstChild;
|
|
nsIFrame* lastFrame = nsnull;
|
|
PRInt32 n = line->ChildCount();
|
|
while (--n >= 0) {
|
|
frame->SetParent(this);
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
nsHTMLContainerFrame::ReparentFrameView(frame, mNextInFlow, this);
|
|
lastFrame = frame;
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
lastFrame->SetNextSibling(nsnull);
|
|
|
|
// Add line to our line list
|
|
if (nsnull == aState.mPrevLine) {
|
|
NS_ASSERTION(nsnull == mLines, "bad aState.mPrevLine");
|
|
mLines = line;
|
|
}
|
|
else {
|
|
NS_ASSERTION(nsnull == aState.mPrevLine->mNext, "bad aState.mPrevLine");
|
|
aState.mPrevLine->mNext = line;
|
|
aState.mPrevChild->SetNextSibling(line->mFirstChild);
|
|
}
|
|
|
|
// Now reflow it and any lines that it makes during it's reflow
|
|
// (we have to loop here because reflowing the line may case a new
|
|
// line to be created; see SplitLine's callers for examples of
|
|
// when this happens).
|
|
while (nsnull != line) {
|
|
rv = ReflowLine(aState, line, &keepGoing);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
DidReflowLine(aState, line, keepGoing);
|
|
if (!keepGoing) {
|
|
if (0 == line->ChildCount()) {
|
|
DeleteLine(aState, line);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// If this is an inline frame then its time to stop
|
|
aState.mPrevLine = line;
|
|
line = line->mNext;
|
|
aState.mLineLayout->AdvanceToNextLine();
|
|
}
|
|
}
|
|
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
gNoiseIndent--;
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": done reflowing dirty lines (status=%x)\n",
|
|
aState.mReflowStatus);
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine)
|
|
{
|
|
NS_PRECONDITION(0 == aLine->ChildCount(), "can't delete !empty line");
|
|
if (0 == aLine->ChildCount()) {
|
|
if (nsnull == aState.mPrevLine) {
|
|
NS_ASSERTION(aLine == mLines, "huh");
|
|
mLines = nsnull;
|
|
}
|
|
else {
|
|
NS_ASSERTION(aState.mPrevLine->mNext == aLine, "bad prev-line");
|
|
aState.mPrevLine->mNext = aLine->mNext;
|
|
}
|
|
delete aLine;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::WillReflowLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine)
|
|
{
|
|
// Setup the first-letter-style-ok flag
|
|
nsLineLayout& lineLayout = *aState.mLineLayout;
|
|
if (mFirstLetterStyle && (0 == lineLayout.GetLineNumber())) {
|
|
lineLayout.SetFirstLetterStyleOK(PR_TRUE);
|
|
}
|
|
else {
|
|
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reflow a line. The line will either contain a single block frame
|
|
* or contain 1 or more inline frames. aLineReflowStatus indicates
|
|
* whether or not the caller should continue to reflow more lines.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
PRBool* aKeepReflowGoing)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// If the line is empty then first pull a frame into it so that we
|
|
// know what kind of line it is (block or inline).
|
|
if (0 == aLine->ChildCount()) {
|
|
nsIFrame* frame;
|
|
rv = PullFrame(aState, aLine, frame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsnull == frame) {
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Setup the line-layout for the new line
|
|
aState.mCurrentLine = aLine;
|
|
aLine->ClearDirty();
|
|
aLine->SetNeedDidReflow();
|
|
|
|
// Now that we know what kind of line we have, reflow it
|
|
if (aLine->IsBlock()) {
|
|
NS_ASSERTION(nsnull == aLine->mFloaters, "bad line");
|
|
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
else {
|
|
rv = ReflowInlineFrames(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Pull frame from the next available location (one of our lines or
|
|
* one of our next-in-flows lines).
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame*& aFrameResult)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
PRBool stopPulling;
|
|
aFrameResult = nsnull;
|
|
|
|
// First check our remaining lines
|
|
while (nsnull != aLine->mNext) {
|
|
rv = PullFrame(aState, aLine, &aLine->mNext, PR_FALSE,
|
|
aFrameResult, stopPulling);
|
|
if (NS_FAILED(rv) || stopPulling) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Pull frames from the next-in-flow(s) until we can't
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
while (nsnull != nextInFlow) {
|
|
nsLineBox* line = nextInFlow->mLines;
|
|
if (nsnull == line) {
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
|
|
aState.mNextInFlow = nextInFlow;
|
|
continue;
|
|
}
|
|
rv = PullFrame(aState, aLine, &nextInFlow->mLines, PR_TRUE,
|
|
aFrameResult, stopPulling);
|
|
if (NS_FAILED(rv) || stopPulling) {
|
|
return rv;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Try to pull a frame out of a line pointed at by aFromList. If a
|
|
* frame is pulled then aPulled will be set to PR_TRUE. In addition,
|
|
* if aUpdateGeometricParent is set then the pulled frames geometric
|
|
* parent will be updated (e.g. when pulling from a next-in-flows line
|
|
* list).
|
|
*
|
|
* Note: pulling a frame from a line that is a place-holder frame
|
|
* doesn't automatically remove the corresponding floater from the
|
|
* line's floater array. This happens indirectly: either the line gets
|
|
* emptied (and destroyed) or the line gets reflowed (because we mark
|
|
* it dirty) and the code at the top of ReflowLine empties the
|
|
* array. So eventually, it will be removed, just not right away.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsLineBox** aFromList,
|
|
PRBool aUpdateGeometricParent,
|
|
nsIFrame*& aFrameResult,
|
|
PRBool& aStopPulling)
|
|
{
|
|
nsLineBox* fromLine = *aFromList;
|
|
NS_ASSERTION(nsnull != fromLine, "bad line to pull from");
|
|
if (0 == fromLine->ChildCount()) {
|
|
// Discard empty lines immediately. Empty lines can happen here
|
|
// because of DeleteChildsNextInFlow not being able to delete
|
|
// lines. Don't stop pulling - there may be more frames around.
|
|
*aFromList = fromLine->mNext;
|
|
NS_ASSERTION(nsnull == fromLine->mFirstChild, "bad empty line");
|
|
delete fromLine;
|
|
aStopPulling = PR_FALSE;
|
|
aFrameResult = nsnull;
|
|
}
|
|
else if ((0 != aLine->ChildCount()) && 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.
|
|
aStopPulling = PR_TRUE;
|
|
aFrameResult = nsnull;
|
|
}
|
|
else {
|
|
// Take frame from fromLine
|
|
nsIFrame* frame = fromLine->mFirstChild;
|
|
if (0 == aLine->mChildCount++) {
|
|
aLine->mFirstChild = frame;
|
|
aLine->SetIsBlock(fromLine->IsBlock());
|
|
NS_ASSERTION(aLine->CheckIsBlock(), "bad line isBlock");
|
|
NS_ASSERTION(nsnull == aLine->mFloaters, "bad line floaters");
|
|
}
|
|
if (0 != --fromLine->mChildCount) {
|
|
// Mark line dirty now that we pulled a child
|
|
fromLine->MarkDirty();
|
|
frame->GetNextSibling(&fromLine->mFirstChild);
|
|
}
|
|
else {
|
|
// Free up the fromLine now that it's empty
|
|
*aFromList = fromLine->mNext;
|
|
delete fromLine;
|
|
}
|
|
|
|
// Change geometric parents
|
|
if (aUpdateGeometricParent) {
|
|
// Before we set the new parent frame get the current parent
|
|
nsIFrame* oldParentFrame;
|
|
frame->GetParent(&oldParentFrame);
|
|
frame->SetParent(this);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
NS_ASSERTION(oldParentFrame != this, "unexpected parent frame");
|
|
nsHTMLContainerFrame::ReparentFrameView(frame, oldParentFrame, this);
|
|
|
|
// The frame is being pulled from a next-in-flow; therefore we
|
|
// need to add it to our sibling list.
|
|
if (nsnull != aState.mPrevChild) {
|
|
aState.mPrevChild->SetNextSibling(frame);
|
|
}
|
|
frame->SetNextSibling(nsnull);
|
|
}
|
|
|
|
// Stop pulling because we found a frame to pull
|
|
aStopPulling = PR_TRUE;
|
|
aFrameResult = frame;
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DidReflowLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
PRBool aLineReflowStatus)
|
|
{
|
|
// If the line no longer needs a floater array, get rid of it and
|
|
// save some memory
|
|
nsVoidArray* array = aLine->mFloaters;
|
|
if (nsnull != array) {
|
|
if (0 == array->Count()) {
|
|
delete array;
|
|
aLine->mFloaters = nsnull;
|
|
}
|
|
else {
|
|
array->Compact();
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SlideLine(nsIPresContext& aPresContext,
|
|
nsISpaceManager* aSpaceManager,
|
|
nsLineBox* aLine, nscoord aDY)
|
|
{
|
|
#if 0
|
|
ListTag(stdout); printf(": SlideLine: line=%p dy=%d\n", aLine, aDY);
|
|
#endif
|
|
// Adjust the Y coordinate of the frames in the line
|
|
nsRect r;
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
PRInt32 n = aLine->ChildCount();
|
|
while (--n >= 0) {
|
|
kid->GetRect(r);
|
|
r.y += aDY;
|
|
kid->SetRect(r);
|
|
|
|
// If the child has any floaters that impact the space manager,
|
|
// slide them now.
|
|
nsIHTMLReflow* ihr;
|
|
if (NS_OK == kid->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
|
|
ihr->MoveInSpaceManager(aPresContext, aSpaceManager, 0, aDY);
|
|
}
|
|
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
|
|
// Adjust line state
|
|
aLine->mBounds.y += aDY;
|
|
aLine->mCombinedArea.y += aDY;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SlideFloaters(nsIPresContext& aPresContext,
|
|
nsISpaceManager* aSpaceManager,
|
|
nsLineBox* aLine, nscoord aDY)
|
|
{
|
|
nsVoidArray* floaters = aLine->mFloaters;
|
|
if (nsnull != floaters) {
|
|
nsRect r;
|
|
PRInt32 i, n = floaters->Count();
|
|
for (i = 0; i < n; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
|
|
nsIFrame* floater = ph->GetAnchoredItem();
|
|
floater->GetRect(r);
|
|
r.y += aDY;
|
|
floater->SetRect(r);
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::MoveInSpaceManager(nsIPresContext& aPresContext,
|
|
nsISpaceManager* aSpaceManager,
|
|
nscoord aDeltaX, nscoord aDeltaY)
|
|
{
|
|
#if 0
|
|
ListTag(stdout); printf(": MoveInSpaceManager: d=%d,%d\n", aDeltaX, aDeltaY);
|
|
#endif
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
// Move the floaters in the spacemanager
|
|
nsVoidArray* floaters = line->mFloaters;
|
|
if (nsnull != floaters) {
|
|
PRInt32 i, n = floaters->Count();
|
|
for (i = 0; i < n; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
|
|
nsIFrame* floater = ph->GetAnchoredItem();
|
|
aSpaceManager->OffsetRegion(floater, aDeltaX, aDeltaY);
|
|
#if 0
|
|
((nsFrame*)kid)->ListTag(stdout); printf(": offset=%d,%d\n", aDeltaX, aDeltaY);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// Tell kids about the move too
|
|
PRInt32 n = line->ChildCount();
|
|
nsIFrame* kid = line->mFirstChild;
|
|
while (--n >= 0) {
|
|
nsIHTMLReflow* ihr;
|
|
if (NS_OK == kid->QueryInterface(kIHTMLReflowIID, (void**)&ihr)) {
|
|
ihr->MoveInSpaceManager(aPresContext, aSpaceManager, aDeltaX, aDeltaY);
|
|
}
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
|
|
line = line->mNext;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AttributeChanged(nsIPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aHint)
|
|
{
|
|
nsresult rv = nsBlockFrameSuper::AttributeChanged(aPresContext, aChild,
|
|
aAttribute, aHint);
|
|
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
if (nsHTMLAtoms::start == aAttribute) {
|
|
// XXX Not sure if this is necessary anymore
|
|
RenumberLists();
|
|
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
aPresContext->GetShell(getter_AddRefs(shell));
|
|
|
|
nsIReflowCommand* reflowCmd;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
|
|
nsIReflowCommand::ContentChanged,
|
|
nsnull,
|
|
aAttribute);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
shell->AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
}
|
|
else if (nsHTMLAtoms::value == aAttribute) {
|
|
const nsStyleDisplay* styleDisplay;
|
|
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) {
|
|
nsIFrame* nextAncestor = mParent;
|
|
nsBlockFrame* blockParent = nsnull;
|
|
|
|
// Search for the closest ancestor that's a block frame. We
|
|
// make the assumption that all related list items share a
|
|
// common block parent.
|
|
while (nextAncestor != nsnull) {
|
|
if (NS_OK == nextAncestor->QueryInterface(kBlockFrameCID,
|
|
(void**)&blockParent)) {
|
|
break;
|
|
}
|
|
nextAncestor->GetParent(&nextAncestor);
|
|
}
|
|
|
|
// Tell the enclosing block frame to renumber list items within
|
|
// itself
|
|
if (nsnull != blockParent) {
|
|
// XXX Not sure if this is necessary anymore
|
|
blockParent->RenumberLists();
|
|
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
aPresContext->GetShell(getter_AddRefs(shell));
|
|
|
|
nsIReflowCommand* reflowCmd;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, blockParent,
|
|
nsIReflowCommand::ContentChanged,
|
|
nsnull,
|
|
aAttribute);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
shell->AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsBlockFrame*
|
|
nsBlockFrame::FindFollowingBlockFrame(nsIFrame* aFrame)
|
|
{
|
|
nsBlockFrame* followingBlockFrame = nsnull;
|
|
nsIFrame* frame = aFrame;
|
|
for (;;) {
|
|
nsIFrame* nextFrame;
|
|
frame->GetNextSibling(&nextFrame);
|
|
if (nsnull != nextFrame) {
|
|
const nsStyleDisplay* display;
|
|
nextFrame->GetStyleData(eStyleStruct_Display,
|
|
(const nsStyleStruct*&) display);
|
|
if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
|
|
followingBlockFrame = (nsBlockFrame*) nextFrame;
|
|
break;
|
|
}
|
|
else if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
|
|
// If it's a text-frame and it's just whitespace and we are
|
|
// in a normal whitespace situation THEN skip it and keep
|
|
// going...
|
|
// XXX WRITE ME!
|
|
}
|
|
frame = nextFrame;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
return followingBlockFrame;
|
|
}
|
|
|
|
// XXX This should be a no-op when there is no first-line/letter style
|
|
// in force!
|
|
void
|
|
nsBlockFrame::WillReflowFrame(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame)
|
|
{
|
|
PRBool repairStyleContext = PR_TRUE;
|
|
|
|
// When reflowing a frame that is on the first-line, check and see
|
|
// if a special style context should be placed in the context chain.
|
|
if ((nsnull == mPrevInFlow) &&
|
|
(0 == aState.mLineLayout->GetLineNumber())) {
|
|
if (nsnull != mFirstLineStyle) {
|
|
// Update the child frames style to inherit from the first-line
|
|
// style.
|
|
|
|
// XXX add code to check first and only do it if it needs doing!
|
|
#ifdef REALLY_NOISY_FIRST_LINE
|
|
DumpStyleGeneaology(aFrame, "");
|
|
#endif
|
|
#ifdef NOISY_FIRST_LINE
|
|
ListTag(stdout);
|
|
printf(": ");
|
|
((nsFrame*)aFrame)->ListTag(stdout);
|
|
printf(" adding in first-line style\n");
|
|
#endif
|
|
aFrame->ReResolveStyleContext(&aState.mPresContext, mFirstLineStyle,
|
|
NS_STYLE_HINT_REFLOW, nsnull, nsnull);
|
|
repairStyleContext = PR_FALSE;
|
|
#ifdef REALLY_NOISY_FIRST_LINE
|
|
DumpStyleGeneaology(aFrame, " ");
|
|
#endif
|
|
}
|
|
if ((nsnull != mFirstLetterStyle) &&
|
|
aState.mLineLayout->GetFirstLetterStyleOK()) {
|
|
aFrame->ReResolveStyleContext(&aState.mPresContext, mFirstLetterStyle,
|
|
NS_STYLE_HINT_REFLOW, nsnull, nsnull);
|
|
repairStyleContext = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
if (repairStyleContext) {
|
|
// Update style context when appropriate
|
|
nsIStyleContext* kidSC;
|
|
aFrame->GetStyleContext(&kidSC);
|
|
if (nsnull != kidSC) {
|
|
nsIStyleContext* kidParentSC;
|
|
kidParentSC = kidSC->GetParent();
|
|
if (nsnull != kidParentSC) {
|
|
if (kidParentSC != mStyleContext) {
|
|
aFrame->ReResolveStyleContext(&aState.mPresContext, mStyleContext,
|
|
NS_STYLE_HINT_REFLOW, nsnull, nsnull);
|
|
}
|
|
NS_RELEASE(kidParentSC);
|
|
}
|
|
NS_RELEASE(kidSC);
|
|
}
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::ShouldApplyTopMargin(nsBlockReflowState& aState,
|
|
nsLineBox* aLine)
|
|
{
|
|
if (aState.mApplyTopMargin) {
|
|
// Apply short-circuit check to avoid searching the line list
|
|
return PR_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.mApplyTopMargin = PR_TRUE;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// Determine if this line is "essentially" the first line
|
|
nsLineBox* line = mLines;
|
|
while (line != aLine) {
|
|
if ((nsnull != line->mFloaters) && (0 != line->mFloaters->Count())) {
|
|
// A line which preceeds aLine is not empty therefore the top
|
|
// margin applies.
|
|
aState.mApplyTopMargin = PR_TRUE;
|
|
return PR_TRUE;
|
|
}
|
|
if (line->IsBlock()) {
|
|
// A line which preceeds aLine contains a block; therefore the
|
|
// top margin applies.
|
|
aState.mApplyTopMargin = PR_TRUE;
|
|
return PR_TRUE;
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
|
|
// 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 PR_FALSE;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::GetTopBlockChild()
|
|
{
|
|
nsIFrame* firstChild = mLines ? mLines->mFirstChild : nsnull;
|
|
if (firstChild) {
|
|
if (mLines->IsBlock()) {
|
|
// Winner
|
|
return firstChild;
|
|
}
|
|
|
|
// If the first line is not a block line then the second line must
|
|
// be a block line otherwise the top child can't be a block.
|
|
nsLineBox* next = mLines->mNext;
|
|
if ((nsnull == next) || !next->IsBlock()) {
|
|
// There is no line after the first line or its not a block so
|
|
// don't bother trying to skip over the first line.
|
|
return nsnull;
|
|
}
|
|
|
|
// The only time we can skip over the first line and pretend its
|
|
// not there is if the line contains only compressed
|
|
// whitespace. If white-space is significant to this frame then we
|
|
// can't skip over the line.
|
|
const nsStyleText* styleText;
|
|
GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) styleText);
|
|
if ((NS_STYLE_WHITESPACE_PRE == styleText->mWhiteSpace) ||
|
|
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == styleText->mWhiteSpace)) {
|
|
// Whitespace is significant
|
|
return nsnull;
|
|
}
|
|
|
|
// See if each frame is a text frame that contains nothing but
|
|
// whitespace.
|
|
PRInt32 n = mLines->mChildCount;
|
|
while (--n >= 0) {
|
|
nsIContent* content;
|
|
nsresult rv = firstChild->GetContent(&content);
|
|
if (NS_FAILED(rv) || (nsnull == content)) {
|
|
return nsnull;
|
|
}
|
|
nsITextContent* tc;
|
|
rv = content->QueryInterface(kITextContentIID, (void**) &tc);
|
|
NS_RELEASE(content);
|
|
if (NS_FAILED(rv) || (nsnull == tc)) {
|
|
return nsnull;
|
|
}
|
|
PRBool isws = PR_FALSE;
|
|
tc->IsOnlyWhitespace(&isws);
|
|
NS_RELEASE(tc);
|
|
if (!isws) {
|
|
return nsnull;
|
|
}
|
|
firstChild->GetNextSibling(&firstChild);
|
|
}
|
|
|
|
// If we make it to this point then every frame on the first line
|
|
// was compressible white-space. Since we already know that the
|
|
// second line contains a block, that block is the
|
|
// top-block-child.
|
|
return next->mFirstChild;
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
PRBool* aKeepReflowGoing)
|
|
{
|
|
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
|
|
// When reflowing a block frame we always get the available space
|
|
aState.GetAvailableSpace();
|
|
|
|
// Notify observers that we are about to reflow the line
|
|
WillReflowLine(aState, aLine);
|
|
|
|
// Prepare the block reflow engine
|
|
const nsStyleDisplay* display;
|
|
frame->GetStyleData(eStyleStruct_Display,
|
|
(const nsStyleStruct*&) display);
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
|
|
aState.mComputeMaxElementSize);
|
|
brc.SetNextRCFrame(aState.mNextRCFrame);
|
|
|
|
// 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 its not significant. Otherwise, dig
|
|
// deeper.
|
|
PRBool applyTopMargin = PR_FALSE;
|
|
nsIFrame* framePrevInFlow;
|
|
frame->GetPrevInFlow(&framePrevInFlow);
|
|
if (nsnull == framePrevInFlow) {
|
|
applyTopMargin = ShouldApplyTopMargin(aState, aLine);
|
|
}
|
|
|
|
// Clear past floaters before the block if the clear style is not none
|
|
aLine->mBreakType = display->mBreakType;
|
|
if (NS_STYLE_CLEAR_NONE != aLine->mBreakType) {
|
|
applyTopMargin = aState.ClearPastFloaters(aLine->mBreakType);
|
|
}
|
|
|
|
// Compute the available space for the block
|
|
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
|
|
frame->IsSplittable(splitType);
|
|
nsRect availSpace;
|
|
aState.ComputeBlockAvailSpace(splitType, availSpace);
|
|
|
|
// Reflow the block into the available space
|
|
WillReflowFrame(aState, aLine, frame);
|
|
nsReflowStatus frameReflowStatus;
|
|
nsMargin computedOffsets;
|
|
rv = brc.ReflowBlock(frame, availSpace, applyTopMargin,
|
|
aState.mPrevBottomMargin, aState.IsAdjacentWithTop(),
|
|
computedOffsets, frameReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
aState.mPrevChild = frame;
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(PR_TRUE, frameReflowStatus);
|
|
#endif
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// None of the child block fits.
|
|
PushLines(aState);
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
else {
|
|
// Note: line-break-after a block is a nop
|
|
|
|
// Try to place the child block
|
|
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
|
|
nscoord collapsedBottomMargin;
|
|
*aKeepReflowGoing = brc.PlaceBlock(isAdjacentWithTop, computedOffsets,
|
|
&collapsedBottomMargin,
|
|
aLine->mBounds, aLine->mCombinedArea);
|
|
if (*aKeepReflowGoing) {
|
|
// Some of the child block fit
|
|
|
|
// Advance to new Y position
|
|
nscoord newY = aLine->mBounds.YMost();
|
|
aState.mY = newY;
|
|
aLine->mCarriedOutBottomMargin = brc.GetCarriedOutBottomMargin();
|
|
|
|
// Continue the block frame now if it didn't completely fit in
|
|
// the available space.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
PRBool madeContinuation;
|
|
rv = CreateContinuationFor(aState, aLine, frame, madeContinuation);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Push continuation to a new line, but only if we actually
|
|
// made one.
|
|
if (madeContinuation) {
|
|
frame->GetNextSibling(&frame);
|
|
nsLineBox* line = new nsLineBox(frame, 1, LINE_IS_BLOCK);
|
|
if (nsnull == line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
line->mNext = aLine->mNext;
|
|
aLine->mNext = line;
|
|
|
|
// Do not count the continuation child on the line it used
|
|
// to be on
|
|
aLine->mChildCount--;
|
|
}
|
|
|
|
// Advance to next line since some of the block fit. That way
|
|
// only the following lines will be pushed.
|
|
aState.mPrevLine = aLine;
|
|
PushLines(aState);
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
*aKeepReflowGoing = PR_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.
|
|
aState.mPrevBottomMargin = 0;
|
|
}
|
|
else {
|
|
aState.mPrevBottomMargin = collapsedBottomMargin;
|
|
}
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": frame=");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" carriedOutBottomMargin=%d collapsedBottomMargin=%d => %d\n",
|
|
aLine->mCarriedOutBottomMargin, collapsedBottomMargin,
|
|
aState.mPrevBottomMargin);
|
|
#endif
|
|
|
|
// Post-process the "line"
|
|
nsSize maxElementSize(0, 0);
|
|
if (aState.mComputeMaxElementSize) {
|
|
maxElementSize = brc.GetMaxElementSize();
|
|
if ((0 != aState.mBand.GetFloaterCount()) &&
|
|
(NS_FRAME_SPLITTABLE_NON_RECTANGULAR != splitType)) {
|
|
// Add in floater impacts to the lines max-element-size, but
|
|
// only if the block element isn't one of us (otherwise the
|
|
// floater impacts will be counted twice).
|
|
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
|
|
}
|
|
}
|
|
PostPlaceLine(aState, aLine, maxElementSize);
|
|
|
|
// Place the "marker" (bullet) frame.
|
|
//
|
|
// 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. Its 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 (HaveOutsideBullet() &&
|
|
((aLine == mLines) ||
|
|
((0 == mLines->mBounds.height) && (aLine == mLines->mNext)))) {
|
|
// Reflow the bullet
|
|
nsHTMLReflowMetrics metrics(nsnull);
|
|
ReflowBullet(aState, metrics);
|
|
|
|
// For bullets that are placed next to a child block, there will
|
|
// be no correct ascent value. Therefore, make one up...
|
|
nscoord ascent = 0;
|
|
const nsStyleFont* font;
|
|
nsresult rv;
|
|
rv = frame->GetStyleData(eStyleStruct_Font,
|
|
(const nsStyleStruct*&) font);
|
|
if (NS_SUCCEEDED(rv) && (nsnull != font)) {
|
|
nsIRenderingContext& rc = *aState.mReflowState.rendContext;
|
|
rc.SetFont(font->mFont);
|
|
nsIFontMetrics* fm;
|
|
rv = rc.GetFontMetrics(fm);
|
|
if (NS_SUCCEEDED(rv) && (nsnull != fm)) {
|
|
fm->GetMaxAscent(ascent);
|
|
NS_RELEASE(fm);
|
|
}
|
|
}
|
|
|
|
// Tall bullets won't look particularly nice here...
|
|
nsRect bbox;
|
|
mBullet->GetRect(bbox);
|
|
nscoord topMargin = applyTopMargin ? collapsedBottomMargin : 0;
|
|
bbox.y = aState.BorderPadding().top + ascent -
|
|
metrics.ascent + topMargin;
|
|
mBullet->SetRect(bbox);
|
|
}
|
|
}
|
|
else {
|
|
// None of the block fits. Determine the correct reflow status.
|
|
if (aLine == mLines) {
|
|
// 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);
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
#define LINE_REFLOW_OK 0
|
|
#define LINE_REFLOW_STOP 1
|
|
#define LINE_REFLOW_REDO 2
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
PRBool* aKeepReflowGoing)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
*aKeepReflowGoing = PR_TRUE;
|
|
|
|
#ifdef DEBUG
|
|
PRInt32 spins = 0;
|
|
#endif
|
|
for (;;) {
|
|
if (nsnull != aLine->mFloaters) {
|
|
// Forget all of the floaters on the line
|
|
aLine->mFloaters->Clear();
|
|
}
|
|
aState.mFloaterCombinedArea.SetRect(0, 0, 0, 0);
|
|
aState.mPendingFloaters.Clear();
|
|
|
|
// Setup initial coordinate system for reflowing the inline frames
|
|
// into. Apply a previous block frame's bottom margin first.
|
|
aState.mY += aState.mPrevBottomMargin;
|
|
aState.GetAvailableSpace();
|
|
|
|
const nsMargin& borderPadding = aState.BorderPadding();
|
|
nscoord x = aState.mAvailSpaceRect.x + borderPadding.left;
|
|
nscoord availWidth = aState.mAvailSpaceRect.width;
|
|
nscoord availHeight;
|
|
if (aState.mUnconstrainedHeight) {
|
|
availHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
/* XXX get the height right! */
|
|
availHeight = aState.mAvailSpaceRect.height;
|
|
}
|
|
PRBool impactedByFloaters = 0 != aState.mBand.GetFloaterCount();
|
|
nsLineLayout* lineLayout = aState.mLineLayout;
|
|
lineLayout->BeginLineReflow(x, aState.mY,
|
|
availWidth, availHeight,
|
|
impactedByFloaters,
|
|
PR_FALSE /*XXX isTopOfPage*/);
|
|
|
|
// Notify observers that we are about to reflow the line
|
|
WillReflowLine(aState, aLine);
|
|
|
|
// Reflow the frames that are already on the line first
|
|
PRUint8 lineReflowStatus = LINE_REFLOW_OK;
|
|
PRInt32 i;
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
for (i = 0; i < aLine->ChildCount(); i++) {
|
|
rv = ReflowInlineFrame(aState, aLine, frame, &lineReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (LINE_REFLOW_OK != lineReflowStatus) {
|
|
// It is possible that one or more of next lines are empty
|
|
// (because of DeleteChildsNextInFlow). If so, delete them now
|
|
// in case we are finished.
|
|
nsLineBox* nextLine = aLine->mNext;
|
|
while ((nsnull != nextLine) && (0 == nextLine->ChildCount())) {
|
|
// XXX Is this still necessary now that DeleteChildsNextInFlow
|
|
// uses DoRemoveFrame?
|
|
aLine->mNext = nextLine->mNext;
|
|
NS_ASSERTION(nsnull == nextLine->mFirstChild, "bad empty line");
|
|
delete nextLine;
|
|
nextLine = aLine->mNext;
|
|
}
|
|
break;
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
|
|
// Pull frames and reflow them until we can't
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
nsIFrame* frame;
|
|
rv = PullFrame(aState, aLine, frame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsnull == frame) {
|
|
break;
|
|
}
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
PRInt32 oldCount = aLine->ChildCount();
|
|
rv = ReflowInlineFrame(aState, aLine, frame, &lineReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (aLine->ChildCount() != 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->GetNextSibling(&frame);
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (LINE_REFLOW_REDO == lineReflowStatus) {
|
|
// This happens only when we have a line that is impacted by
|
|
// floaters and the first element in the line doesn't fit with
|
|
// the floaters.
|
|
//
|
|
// What we do is to advance past the first floater we find and
|
|
// then reflow the line all over again.
|
|
NS_ASSERTION(aState.mBand.GetFloaterCount(),
|
|
"redo line on totally empty line");
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
|
|
"unconstrained height on totally empty line");
|
|
aState.mY += aState.mAvailSpaceRect.height;
|
|
// 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 floater.
|
|
lineLayout->EndLineReflow();
|
|
#ifdef DEBUG
|
|
spins++;
|
|
if (1000 == spins) {
|
|
ListTag(stdout);
|
|
printf(": yikes! spinning on a line over 1000 times!\n");
|
|
NS_ABORT();
|
|
}
|
|
#endif
|
|
continue;
|
|
}
|
|
|
|
// If we are propogating out a break-before status then there is
|
|
// no point in placing the line.
|
|
if (NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
|
|
lineLayout->EndLineReflow();
|
|
}
|
|
else {
|
|
rv = PlaceLine(aState, aLine, aKeepReflowGoing);
|
|
}
|
|
break;
|
|
}
|
|
|
|
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: PR_TRUE means keep placing frames
|
|
* on the line; PR_FALSE means don't (the line is done). If the line
|
|
* has some sort of breaking affect then aLine->mBreakType will be set
|
|
* to something other than NS_STYLE_CLEAR_NONE.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame,
|
|
PRUint8* aLineReflowStatus)
|
|
{
|
|
*aLineReflowStatus = LINE_REFLOW_OK;
|
|
|
|
// Send pre-reflow notification
|
|
WillReflowFrame(aState, aLine, aFrame);
|
|
|
|
// If it's currently ok to be reflowing in first-letter style then
|
|
// we must be about to reflow a frame that has first-letter style.
|
|
PRBool reflowingFirstLetter = aState.mLineLayout->GetFirstLetterStyleOK();
|
|
|
|
// Reflow the inline frame
|
|
nsLineLayout* lineLayout = aState.mLineLayout;
|
|
nsReflowStatus frameReflowStatus;
|
|
nsresult rv = lineLayout->ReflowFrame(aFrame, &aState.mNextRCFrame,
|
|
frameReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
#ifdef REALLY_NOISY_REFLOW_CHILD
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": status=%x\n", frameReflowStatus);
|
|
#endif
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(PR_FALSE, frameReflowStatus);
|
|
#endif
|
|
|
|
// Send post-reflow notification
|
|
aState.mPrevChild = aFrame;
|
|
|
|
// 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->mBreakType = NS_STYLE_CLEAR_NONE;
|
|
if (NS_INLINE_IS_BREAK(frameReflowStatus)) {
|
|
// 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->mBreakType be set to in all these cases?
|
|
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
|
|
NS_ASSERTION(breakType != NS_STYLE_CLEAR_NONE, "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 theres no room (e.g. on a
|
|
// line with wide floaters). Inform the caller to reflow the
|
|
// line after skipping past a floater.
|
|
*aLineReflowStatus = LINE_REFLOW_REDO;
|
|
}
|
|
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, aLine, aFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// Break-after cases
|
|
aLine->mBreakType = breakType;
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
PRBool madeContinuation;
|
|
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
// Split line, but after the frame just reflowed
|
|
nsIFrame* nextFrame;
|
|
aFrame->GetNextSibling(&nextFrame);
|
|
rv = SplitLine(aState, aLine, nextFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Mark next line dirty in case SplitLine didn't end up
|
|
// pushing any frames.
|
|
nsLineBox* next = aLine->mNext;
|
|
if ((nsnull != next) && !next->IsBlock()) {
|
|
next->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
else if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// Frame is not-complete, no special breaking status
|
|
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
PRBool madeContinuation;
|
|
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
PRBool needSplit = PR_FALSE;
|
|
if (!reflowingFirstLetter) {
|
|
needSplit = PR_TRUE;
|
|
}
|
|
else {
|
|
#if 0
|
|
// We need to repair the style-contexts of the continuation
|
|
// frame for the frame we just reflowed so that it not longer
|
|
// has first-letter style..
|
|
nsIFrame* nextInFlow;
|
|
aFrame->GetNextInFlow(&nextInFlow);
|
|
if (nsnull != nextInFlow) {
|
|
nsIStyleContext* kidSC;
|
|
nextInFlow->GetStyleContext(&kidSC);
|
|
if (nsnull != kidSC) {
|
|
nsIStyleContext* kidParentSC;
|
|
kidParentSC = kidSC->GetParent();
|
|
if (nsnull != kidParentSC) {
|
|
if (kidParentSC == mFirstLetterStyle) {
|
|
nsFrame::ListTag(stdout, nextInFlow);
|
|
printf(": changing style contexts\n");
|
|
nextInFlow->ReResolveStyleContext(&aState.mPresContext,
|
|
(mFirstLineStyle
|
|
? mFirstLineStyle
|
|
: mStyleContext),
|
|
NS_STYLE_HINT_REFLOW, nsnull,
|
|
nsnull);
|
|
}
|
|
NS_RELEASE(kidParentSC);
|
|
}
|
|
NS_RELEASE(kidSC);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (needSplit) {
|
|
// Split line after the current frame
|
|
*aLineReflowStatus = LINE_REFLOW_STOP;
|
|
aFrame->GetNextSibling(&aFrame);
|
|
rv = SplitLine(aState, aLine, aFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
// Mark next line dirty in case SplitLine didn't end up
|
|
// pushing any frames.
|
|
nsLineBox* next = aLine->mNext;
|
|
if ((nsnull != next) && !next->IsBlock()) {
|
|
next->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Create a continuation, if necessary, for aFrame. Place it on the
|
|
* same line that aFrame is on. Set aMadeNewFrame to PR_TRUE if a
|
|
* new frame is created.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame,
|
|
PRBool& aMadeNewFrame)
|
|
{
|
|
aMadeNewFrame = PR_FALSE;
|
|
nsresult rv;
|
|
nsIFrame* nextInFlow;
|
|
rv = CreateNextInFlow(aState.mPresContext, this, aFrame, nextInFlow);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsnull != nextInFlow) {
|
|
aMadeNewFrame = PR_TRUE;
|
|
aLine->mChildCount++;
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame)
|
|
{
|
|
nsLineLayout* lineLayout = aState.mLineLayout;
|
|
PRInt32 pushCount = aLine->ChildCount() - lineLayout->GetCurrentSpanCount();
|
|
//printf("BEFORE (pushCount=%d):\n", pushCount);
|
|
//aLine->List(stdout, 0);
|
|
if (0 != pushCount) {
|
|
NS_ASSERTION(aLine->ChildCount() > pushCount, "bad push");
|
|
NS_ASSERTION(nsnull != aFrame, "whoops");
|
|
nsLineBox* to = aLine->mNext;
|
|
if (nsnull != to) {
|
|
// Only push into the next line if it's empty; otherwise we can
|
|
// end up pushing a frame which is continued into the same frame
|
|
// as it's continuation. This causes all sorts of bad side
|
|
// effects so we don't allow it.
|
|
if (0 != to->ChildCount()) {
|
|
nsLineBox* insertedLine = new nsLineBox(aFrame, pushCount, 0);
|
|
if (nsnull == insertedLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aLine->mNext = insertedLine;
|
|
insertedLine->mNext = to;
|
|
to = insertedLine;
|
|
} else {
|
|
to->mFirstChild = aFrame;
|
|
to->mChildCount = pushCount;
|
|
to->MarkDirty();
|
|
}
|
|
} else {
|
|
to = new nsLineBox(aFrame, pushCount, 0);
|
|
if (nsnull == to) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aLine->mNext = to;
|
|
}
|
|
to->SetIsBlock(aLine->IsBlock());
|
|
aLine->mChildCount -= pushCount;
|
|
|
|
// Let line layout know that some frames are no longer part of its
|
|
// state.
|
|
if (!aLine->IsBlock()) {
|
|
lineLayout->SplitLineTo(aLine->ChildCount());
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::ShouldJustifyLine(nsBlockReflowState& aState, nsLineBox* aLine)
|
|
{
|
|
nsLineBox* next = aLine->mNext;
|
|
while (nsnull != next) {
|
|
// There is another line
|
|
if (0 != next->ChildCount()) {
|
|
// If the next line is a block line then we must not justify
|
|
// this line because it means that this line is the last in a
|
|
// group of inline lines.
|
|
return !next->IsBlock();
|
|
}
|
|
|
|
// The next line is empty, try the next one
|
|
next = next->mNext;
|
|
}
|
|
|
|
// XXX Not sure about this part
|
|
// Try our next-in-flows lines to answer the question
|
|
nsBlockFrame* nextInFlow = (nsBlockFrame*) mNextInFlow;
|
|
while (nsnull != nextInFlow) {
|
|
nsLineBox* line = nextInFlow->mLines;
|
|
while (nsnull != line) {
|
|
if (0 != line->ChildCount()) {
|
|
return !line->IsBlock();
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
|
|
}
|
|
|
|
// This is the last line - so don't allow justification
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
PRBool* aKeepReflowGoing)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
// 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. Its 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>... ).
|
|
//
|
|
// For this code, only the first case is possible because this
|
|
// method is used for placing a line of inline frames. If the rare
|
|
// case is happening then the worst that will happen is that the
|
|
// bullet frame will be reflowed twice.
|
|
nsLineLayout* lineLayout = aState.mLineLayout;
|
|
PRBool addedBullet = PR_FALSE;
|
|
if (HaveOutsideBullet() && (aLine == mLines) &&
|
|
!lineLayout->IsZeroHeight()) {
|
|
nsHTMLReflowMetrics metrics(nsnull);
|
|
ReflowBullet(aState, metrics);
|
|
lineLayout->AddBulletFrame(mBullet, metrics);
|
|
addedBullet = PR_TRUE;
|
|
}
|
|
nsSize maxElementSize;
|
|
lineLayout->VerticalAlignFrames(aLine->mBounds, maxElementSize);
|
|
#ifdef DEBUG
|
|
if (CRAZY_HEIGHT(aLine->mBounds.y)) {
|
|
nsFrame::ListTag(stdout);
|
|
printf(": line=%p y=%d line.bounds.height=%d\n",
|
|
aLine, aLine->mBounds.y, aLine->mBounds.height);
|
|
}
|
|
#endif
|
|
|
|
// Only block frames horizontally align their children because
|
|
// inline frames "shrink-wrap" around their children (therefore
|
|
// there is no extra horizontal space).
|
|
#if XXX_fix_me
|
|
PRBool allowJustify = PR_TRUE;
|
|
if (NS_STYLE_TEXT_ALIGN_JUSTIFY == aState.mStyleText->mTextAlign) {
|
|
allowJustify = ShouldJustifyLine(aState, aLine);
|
|
}
|
|
#else
|
|
PRBool allowJustify = PR_FALSE;
|
|
#endif
|
|
lineLayout->TrimTrailingWhiteSpace(aLine->mBounds);
|
|
lineLayout->HorizontalAlignFrames(aLine->mBounds, allowJustify);
|
|
lineLayout->RelativePositionFrames(aLine->mCombinedArea);
|
|
if (addedBullet) {
|
|
lineLayout->RemoveBulletFrame(mBullet);
|
|
}
|
|
|
|
// 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->mBounds.height > 0) {
|
|
// This line has some height. Therefore the application of the
|
|
// previous-bottom-margin should stick.
|
|
aState.mPrevBottomMargin = 0;
|
|
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.
|
|
nscoord dy = -aState.mPrevBottomMargin;
|
|
newY = aState.mY + dy;
|
|
aLine->mCombinedArea.y += dy;
|
|
aLine->mBounds.y += dy;
|
|
}
|
|
aLine->mCarriedOutBottomMargin = 0;/* XXX_ib */
|
|
|
|
// See if the line fit. If it doesn't we need to push it. Our first
|
|
// line will always fit.
|
|
if ((mLines != aLine) && (newY > aState.mBottomEdge)) {
|
|
// Push this line and all of it's children and anything else that
|
|
// follows to our next-in-flow
|
|
PushLines(aState);
|
|
|
|
// Stop reflow and whack the reflow status if reflow hasn't
|
|
// already been stopped.
|
|
if (*aKeepReflowGoing) {
|
|
NS_ASSERTION(NS_FRAME_COMPLETE == aState.mReflowStatus,
|
|
"lost reflow status");
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
}
|
|
lineLayout->EndLineReflow();
|
|
return rv;
|
|
}
|
|
|
|
aState.mY = newY;
|
|
if (aState.mComputeMaxElementSize) {
|
|
if (0 != aState.mBand.GetFloaterCount()) {
|
|
// Add in floater impacts to the lines max-element-size
|
|
ComputeLineMaxElementSize(aState, aLine, &maxElementSize);
|
|
}
|
|
}
|
|
PostPlaceLine(aState, aLine, maxElementSize);
|
|
|
|
// Any below current line floaters to place?
|
|
if (0 != aState.mPendingFloaters.Count()) {
|
|
// Now is the time that we reflow them and update the computed
|
|
// line combined area.
|
|
aState.PlaceBelowCurrentLineFloaters(&aState.mPendingFloaters, PR_TRUE);
|
|
aState.mPendingFloaters.Clear();
|
|
}
|
|
|
|
// When a line has floaters, factor them into the combined-area
|
|
// computations.
|
|
if (nsnull != aLine->mFloaters) {
|
|
// Combine the floater combined area (stored in aState) and the
|
|
// value computed by the line layout code.
|
|
CombineRects(aState.mFloaterCombinedArea, aLine->mCombinedArea);
|
|
}
|
|
|
|
// Apply break-after clearing if necessary
|
|
switch (aLine->mBreakType) {
|
|
case NS_STYLE_CLEAR_LEFT:
|
|
case NS_STYLE_CLEAR_RIGHT:
|
|
case NS_STYLE_CLEAR_LEFT_AND_RIGHT:
|
|
aState.ClearFloaters(aState.mY, aLine->mBreakType);
|
|
break;
|
|
}
|
|
|
|
lineLayout->EndLineReflow();
|
|
|
|
return rv;
|
|
}
|
|
|
|
// Compute the line's max-element-size by adding into the raw value
|
|
// computed by reflowing the contents of the line (aMaxElementSize)
|
|
// the impact of floaters on this line or the preceeding lines.
|
|
void
|
|
nsBlockFrame::ComputeLineMaxElementSize(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsSize* aMaxElementSize)
|
|
{
|
|
nscoord maxWidth, maxHeight;
|
|
aState.mBand.GetMaxElementSize(&maxWidth, &maxHeight);
|
|
#ifdef NOISY_MAX_ELEMENT_SIZE
|
|
IndentBy(stdout, GetDepth());
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
|
|
printf("PASS1 ");
|
|
}
|
|
ListTag(stdout);
|
|
printf(": maxFloaterSize=%d,%d\n", maxWidth, maxHeight);
|
|
#endif
|
|
|
|
// If the floaters are wider than the content, then use the maximum
|
|
// floater width as the maximum width.
|
|
//
|
|
// It used to be the case that we would always place some content
|
|
// next to a floater, regardless of the amount of available space
|
|
// after subtracing off the floaters sizes. This can lead to content
|
|
// overlapping floaters, so we no longer do this (and pass CSS2's
|
|
// conformance tests). This is not how navigator 4-1 used to do
|
|
// things.
|
|
if (maxWidth > aMaxElementSize->width) {
|
|
aMaxElementSize->width = maxWidth;
|
|
}
|
|
|
|
// Only update the max-element-size's height value if the floater is
|
|
// part of the current line.
|
|
if ((nsnull != aLine->mFloaters) &&
|
|
(0 != aLine->mFloaters->Count())) {
|
|
// If the maximum-height of the tallest floater is larger than the
|
|
// maximum-height of the content then update the max-element-size
|
|
// height
|
|
if (maxHeight > aMaxElementSize->height) {
|
|
aMaxElementSize->height = maxHeight;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PostPlaceLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
const nsSize& aMaxElementSize)
|
|
{
|
|
// Update max-element-size
|
|
if (aState.mComputeMaxElementSize) {
|
|
aState.UpdateMaxElementSize(aMaxElementSize);
|
|
}
|
|
|
|
#if XXX_need_line_outside_children
|
|
// Compute LINE_OUTSIDE_CHILDREN state for this line. The bit is set
|
|
// if any child frame has outside children.
|
|
if ((aLine->mCombinedArea.x < aLine->mBounds.x) ||
|
|
(aLine->mCombinedArea.XMost() > aLine->mBounds.XMost()) ||
|
|
(aLine->mCombinedArea.y < aLine->mBounds.y) ||
|
|
(aLine->mCombinedArea.YMost() > aLine->mBounds.YMost())) {
|
|
aLine->SetOutsideChildren();
|
|
}
|
|
else {
|
|
aLine->ClearOutsideChildren();
|
|
}
|
|
#endif
|
|
|
|
// Update xmost
|
|
nscoord xmost = aLine->mBounds.XMost();
|
|
if (xmost > aState.mKidXMost) {
|
|
#ifdef DEBUG
|
|
if (CRAZY_WIDTH(xmost)) {
|
|
ListTag(stdout);
|
|
printf(": line=%p xmost=%d\n", aLine, xmost);
|
|
}
|
|
#endif
|
|
aState.mKidXMost = xmost;
|
|
}
|
|
}
|
|
|
|
static nsresult
|
|
FindFloatersIn(nsIFrame* aFrame, nsVoidArray*& aArray)
|
|
{
|
|
const nsStyleDisplay* display;
|
|
aFrame->GetStyleData(eStyleStruct_Display,
|
|
(const nsStyleStruct*&) display);
|
|
if (NS_STYLE_FLOAT_NONE != display->mFloats) {
|
|
if (nsnull == aArray) {
|
|
aArray = new nsVoidArray();
|
|
if (nsnull == aArray) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
aArray->AppendElement(aFrame);
|
|
}
|
|
|
|
if (NS_STYLE_DISPLAY_INLINE == display->mDisplay) {
|
|
nsIFrame* kid;
|
|
aFrame->FirstChild(nsnull, &kid);
|
|
while (nsnull != kid) {
|
|
nsresult rv = FindFloatersIn(kid, aArray);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::FindFloaters(nsLineBox* aLine)
|
|
{
|
|
nsVoidArray* floaters = aLine->mFloaters;
|
|
if (nsnull != floaters) {
|
|
// Empty floater array before proceeding
|
|
floaters->Clear();
|
|
}
|
|
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
PRInt32 n = aLine->ChildCount();
|
|
while (--n >= 0) {
|
|
FindFloatersIn(frame, floaters);
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
|
|
aLine->mFloaters = floaters;
|
|
|
|
// Get rid of floater array if we don't need it
|
|
if (nsnull != floaters) {
|
|
if (0 == floaters->Count()) {
|
|
delete floaters;
|
|
aLine->mFloaters = nsnull;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushLines(nsBlockReflowState& aState)
|
|
{
|
|
NS_ASSERTION(nsnull != aState.mPrevLine, "bad push");
|
|
|
|
nsLineBox* lastLine = aState.mPrevLine;
|
|
nsLineBox* nextLine = lastLine->mNext;
|
|
|
|
lastLine->mNext = nsnull;
|
|
mOverflowLines = nextLine;
|
|
|
|
// Mark all the overflow lines dirty so that they get reflowed when
|
|
// they are pulled up by our next-in-flow.
|
|
while (nsnull != nextLine) {
|
|
nextLine->MarkDirty();
|
|
nextLine = nextLine->mNext;
|
|
}
|
|
|
|
// Break frame sibling list
|
|
nsIFrame* lastFrame = lastLine->LastChild();
|
|
lastFrame->SetNextSibling(nsnull);
|
|
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::DrainOverflowLines()
|
|
{
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
PRBool drained = PR_FALSE;
|
|
|
|
// First grab the prev-in-flows overflow lines
|
|
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
|
|
if (nsnull != prevBlock) {
|
|
nsLineBox* line = prevBlock->mOverflowLines;
|
|
if (nsnull != line) {
|
|
drained = PR_TRUE;
|
|
prevBlock->mOverflowLines = nsnull;
|
|
|
|
// Make all the frames on the mOverflowLines list mine
|
|
nsIFrame* lastFrame = nsnull;
|
|
nsIFrame* frame = line->mFirstChild;
|
|
while (nsnull != frame) {
|
|
frame->SetParent(this);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
nsHTMLContainerFrame::ReparentFrameView(frame, prevBlock, this);
|
|
|
|
// Get the next frame
|
|
lastFrame = frame;
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
|
|
// Join the line lists
|
|
if (nsnull == mLines) {
|
|
mLines = line;
|
|
}
|
|
else {
|
|
// Join the sibling lists together
|
|
lastFrame->SetNextSibling(mLines->mFirstChild);
|
|
|
|
// Place overflow lines at the front of our line list
|
|
nsLineBox* lastLine = nsLineBox::LastLine(line);
|
|
lastLine->mNext = mLines;
|
|
mLines = line;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now grab our own overflow lines
|
|
if (nsnull != mOverflowLines) {
|
|
// This can happen when we reflow and not everything fits and then
|
|
// we are told to reflow again before a next-in-flow is created
|
|
// and reflows.
|
|
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
|
|
if (nsnull == lastLine) {
|
|
mLines = mOverflowLines;
|
|
}
|
|
else {
|
|
lastLine->mNext = mOverflowLines;
|
|
nsIFrame* lastFrame = lastLine->LastChild();
|
|
lastFrame->SetNextSibling(mOverflowLines->mFirstChild);
|
|
|
|
// Update our last-content-index now that we have a new last child
|
|
lastLine = nsLineBox::LastLine(mOverflowLines);
|
|
}
|
|
mOverflowLines = nsnull;
|
|
drained = PR_TRUE;
|
|
}
|
|
return drained;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame list manipulation routines
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AppendFrames(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
if (nsLayoutAtoms::floaterList == aListName) {
|
|
// XXX we don't *really* care about this right now because we are
|
|
// BuildFloaterList ing still
|
|
mFloaters.AppendFrames(nsnull, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
else if (nsLayoutAtoms::absoluteList == aListName) {
|
|
// XXX temporary until area frame and floater code is updated
|
|
return nsFrame::AppendFrames(aPresContext, aPresShell, aListName,
|
|
aFrameList);
|
|
}
|
|
else if (nsnull != aListName) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
nsresult rv = AppendNewFrames(aPresContext, aFrameList);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Generate reflow command to reflow the dirty lines
|
|
nsIReflowCommand* reflowCmd = nsnull;
|
|
nsresult rv;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
|
|
nsIReflowCommand::ReflowDirty,
|
|
nsnull);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (nsnull != aListName) {
|
|
reflowCmd->SetChildListName(aListName);
|
|
}
|
|
aPresShell.AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::AppendNewFrames(nsIPresContext& aPresContext,
|
|
nsIFrame* aNewFrame)
|
|
{
|
|
// Get our last line and then get its last child
|
|
nsIFrame* lastFrame;
|
|
nsLineBox* lastLine = nsLineBox::LastLine(mLines);
|
|
if (nsnull != lastLine) {
|
|
lastFrame = lastLine->LastChild();
|
|
} else {
|
|
lastFrame = nsnull;
|
|
}
|
|
|
|
// Add the new frames to the sibling list; wrap any frames that
|
|
// require wrapping
|
|
if (nsnull != lastFrame) {
|
|
lastFrame->SetNextSibling(aNewFrame);
|
|
}
|
|
|
|
// Make sure that new inlines go onto the end of the lastLine when
|
|
// the lastLine is mapping inline frames.
|
|
PRInt32 pendingInlines = 0;
|
|
if (nsnull != lastLine) {
|
|
if (!lastLine->IsBlock()) {
|
|
pendingInlines = 1;
|
|
}
|
|
}
|
|
|
|
// Now create some lines for the new frames
|
|
nsIFrame* prevFrame = lastFrame;
|
|
for (nsIFrame* frame = aNewFrame; nsnull != frame;
|
|
frame->GetNextSibling(&frame)) {
|
|
// See if the child is a block or non-block
|
|
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(frame);
|
|
|
|
// If the child is an inline then add it to the lastLine (if it's
|
|
// an inline line, otherwise make a new line). If the child is a
|
|
// block then make a new line and put the child in that line.
|
|
if (isBlock) {
|
|
// If the previous line has pending inline data to be reflowed,
|
|
// do so now.
|
|
if (0 != pendingInlines) {
|
|
// Set this to true in case we don't end up reflowing all of the
|
|
// frames on the line (because they end up being pushed).
|
|
lastLine->MarkDirty();
|
|
pendingInlines = 0;
|
|
}
|
|
|
|
// Create a line for the block
|
|
nsLineBox* line = new nsLineBox(frame, 1, LINE_IS_BLOCK);
|
|
if (nsnull == line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
if (nsnull == lastLine) {
|
|
mLines = line;
|
|
}
|
|
else {
|
|
lastLine->mNext = line;
|
|
}
|
|
lastLine = line;
|
|
}
|
|
else {
|
|
if (0 == pendingInlines) {
|
|
nsLineBox* line = new nsLineBox(frame, 0, 0);
|
|
if (nsnull == line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
if (nsnull == lastLine) {
|
|
mLines = line;
|
|
}
|
|
else {
|
|
lastLine->mNext = line;
|
|
}
|
|
lastLine = line;
|
|
}
|
|
lastLine->mChildCount++;
|
|
pendingInlines++;
|
|
}
|
|
|
|
// Remember the previous frame
|
|
prevFrame = frame;
|
|
}
|
|
|
|
if (0 != pendingInlines) {
|
|
// Set this to true in case we don't end up reflowing all of the
|
|
// frames on the line (because they end up being pushed).
|
|
lastLine->MarkDirty();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
MarkEmptyLines(aPresContext);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::InsertFrames(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
if (nsLayoutAtoms::floaterList == aListName) {
|
|
// XXX we don't *really* care about this right now because we are
|
|
// BuildFloaterList ing still
|
|
mFloaters.AppendFrames(nsnull, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
else if (nsLayoutAtoms::absoluteList == aListName) {
|
|
// XXX temporary until area frame and floater code is updated
|
|
return nsFrame::InsertFrames(aPresContext, aPresShell, aListName,
|
|
aPrevFrame, aFrameList);
|
|
}
|
|
else if (nsnull != aListName) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
nsresult rv = InsertNewFrames(aPresContext, aFrameList, aPrevFrame);
|
|
|
|
#ifdef SLOW_INCREMENTAL_REFLOW
|
|
// XXX Temporary code to ensure that that right things
|
|
// get marked direty. Kipp will replace this with better
|
|
// code.
|
|
// Mark everything dirty
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
line->MarkDirty();
|
|
line = line->mNext;
|
|
}
|
|
#endif
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Generate reflow command to reflow the dirty lines
|
|
nsIReflowCommand* reflowCmd = nsnull;
|
|
nsresult rv;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
|
|
nsIReflowCommand::ReflowDirty,
|
|
nsnull);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (nsnull != aListName) {
|
|
reflowCmd->SetChildListName(aListName);
|
|
}
|
|
aPresShell.AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
// XXX rewrite to deal with a list of frames
|
|
nsresult
|
|
nsBlockFrame::InsertNewFrames(nsIPresContext& aPresContext,
|
|
nsIFrame* aFrameList,
|
|
nsIFrame* aPrevSibling)
|
|
{
|
|
if (nsnull == mLines) {
|
|
NS_ASSERTION(nsnull == aPrevSibling, "prev-sibling and empty line list!");
|
|
return AppendNewFrames(aPresContext, aFrameList);
|
|
}
|
|
|
|
nsIFrame* newFrame = aFrameList;
|
|
while (nsnull != newFrame) {
|
|
nsIFrame* next;
|
|
newFrame->GetNextSibling(&next);
|
|
newFrame->SetNextSibling(nsnull);
|
|
PRUint16 newFrameIsBlock =
|
|
nsLineLayout::TreatFrameAsBlock(newFrame)
|
|
? LINE_IS_BLOCK
|
|
: 0;
|
|
|
|
// Insert/append the frame into flows line list at the right spot
|
|
nsLineBox* newLine;
|
|
nsLineBox* line = mLines;
|
|
if (nsnull == aPrevSibling) {
|
|
// Insert new frame into the sibling list
|
|
newFrame->SetNextSibling(line->mFirstChild);
|
|
|
|
if (line->IsBlock() || newFrameIsBlock) {
|
|
// Create a new line
|
|
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
|
|
if (nsnull == newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
newLine->mNext = mLines;
|
|
mLines = newLine;
|
|
} else {
|
|
// Insert frame at the front of the line
|
|
line->mFirstChild = newFrame;
|
|
line->mChildCount++;
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
else {
|
|
// Find line containing the previous sibling to the new frame
|
|
line = nsLineBox::FindLineContaining(line, aPrevSibling);
|
|
NS_ASSERTION(nsnull != line, "no line contains the previous sibling");
|
|
if (nsnull != line) {
|
|
if (line->IsBlock()) {
|
|
// Create a new line just after line
|
|
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
|
|
if (nsnull == newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
newLine->mNext = line->mNext;
|
|
line->mNext = newLine;
|
|
}
|
|
else if (newFrameIsBlock) {
|
|
// Split line in two, if necessary. We can't allow a block to
|
|
// end up in an inline line.
|
|
if (line->IsLastChild(aPrevSibling)) {
|
|
// The new frame goes after prevSibling and prevSibling is
|
|
// the last frame on the line. Therefore we don't need to
|
|
// split the line, just create a new line.
|
|
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
|
|
if (nsnull == newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
newLine->mNext = line->mNext;
|
|
line->mNext = newLine;
|
|
}
|
|
else {
|
|
// The new frame goes after prevSibling and prevSibling is
|
|
// somewhere in the line, but not at the end. Split the line
|
|
// just after prevSibling.
|
|
PRInt32 i, n = line->ChildCount();
|
|
nsIFrame* frame = line->mFirstChild;
|
|
for (i = 0; i < n; i++) {
|
|
if (frame == aPrevSibling) {
|
|
nsIFrame* nextSibling;
|
|
aPrevSibling->GetNextSibling(&nextSibling);
|
|
|
|
// Create new line to hold the remaining frames
|
|
NS_ASSERTION(n - i - 1 > 0, "bad line count");
|
|
newLine = new nsLineBox(nextSibling, n - i - 1, 0);
|
|
if (nsnull == newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
newLine->mNext = line->mNext;
|
|
line->mNext = newLine;
|
|
line->MarkDirty();
|
|
line->mChildCount = i + 1;
|
|
break;
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
|
|
// Now create a new line to hold the block
|
|
newLine = new nsLineBox(newFrame, 1, newFrameIsBlock);
|
|
if (nsnull == newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
newLine->mNext = line->mNext;
|
|
line->mNext = newLine;
|
|
}
|
|
}
|
|
else {
|
|
line->mChildCount++;
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
|
|
// Insert new frame into the sibling list; note: this must be done
|
|
// after the above logic because the above logic depends on the
|
|
// sibling list being in the "before insertion" state.
|
|
nsIFrame* nextSibling;
|
|
aPrevSibling->GetNextSibling(&nextSibling);
|
|
newFrame->SetNextSibling(nextSibling);
|
|
aPrevSibling->SetNextSibling(newFrame);
|
|
}
|
|
aPrevSibling = newFrame;
|
|
newFrame = next;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
MarkEmptyLines(aPresContext);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::RemoveFrame(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
if (nsLayoutAtoms::floaterList == aListName) {
|
|
// Remove floater from the floater list first
|
|
mFloaters.RemoveFrame(aOldFrame);
|
|
|
|
// Find which line contains the floater
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
nsVoidArray* floaters = line->mFloaters;
|
|
if (nsnull != floaters) {
|
|
PRInt32 i, count = floaters->Count();
|
|
for (i = 0; i < count; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*)floaters->ElementAt(i);
|
|
if (ph->GetAnchoredItem() == aOldFrame) {
|
|
// Note: the placeholder is part of the line's child list
|
|
// and will be removed later.
|
|
// XXX stop storing pointers to the placeholder in the line list???
|
|
ph->SetAnchoredItem(nsnull);
|
|
floaters->RemoveElementAt(i);
|
|
aOldFrame->DeleteFrame(aPresContext);
|
|
goto found_it;
|
|
}
|
|
}
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
found_it:
|
|
|
|
// Mark every line at and below the line where the floater was dirty
|
|
while (nsnull != line) {
|
|
line->MarkDirty();
|
|
line = line->mNext;
|
|
}
|
|
|
|
// We will reflow *after* removing the placeholder (which is done 2nd)
|
|
return NS_OK;
|
|
}
|
|
else if (nsLayoutAtoms::absoluteList == aListName) {
|
|
// XXX temporary until area frame code is updated
|
|
return nsFrame::RemoveFrame(aPresContext, aPresShell, aListName,
|
|
aOldFrame);
|
|
}
|
|
else if (nsnull != aListName) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
else {
|
|
rv = DoRemoveFrame(aPresContext, aOldFrame);
|
|
|
|
#ifdef SLOW_INCREMENTAL_REFLOW
|
|
// XXX Temporary code to ensure that that right things
|
|
// get marked direty. Kipp will replace this with better
|
|
// code.
|
|
// Mark everything dirty
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
line->MarkDirty();
|
|
line = line->mNext;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Generate reflow command to reflow the dirty lines
|
|
nsIReflowCommand* reflowCmd = nsnull;
|
|
nsresult rv;
|
|
rv = NS_NewHTMLReflowCommand(&reflowCmd, this,
|
|
nsIReflowCommand::ReflowDirty,
|
|
nsnull);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (nsnull != aListName) {
|
|
reflowCmd->SetChildListName(aListName);
|
|
}
|
|
aPresShell.AppendReflowCommand(reflowCmd);
|
|
NS_RELEASE(reflowCmd);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::DoRemoveFrame(nsIPresContext& aPresContext,
|
|
nsIFrame* aDeletedFrame)
|
|
{
|
|
// Find the line and the previous sibling that contains
|
|
// deletedFrame; we also find the pointer to the line.
|
|
nsBlockFrame* flow = this;
|
|
nsLineBox** linep = &flow->mLines;
|
|
nsLineBox* line = flow->mLines;
|
|
nsLineBox* prevLine = nsnull;
|
|
nsIFrame* prevSibling = nsnull;
|
|
while (nsnull != line) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
PRInt32 n = line->ChildCount();
|
|
while (--n >= 0) {
|
|
if (frame == aDeletedFrame) {
|
|
goto found_frame;
|
|
}
|
|
prevSibling = frame;
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
linep = &line->mNext;
|
|
prevLine = line;
|
|
line = line->mNext;
|
|
}
|
|
found_frame:;
|
|
#ifdef NS_DEBUG
|
|
NS_ASSERTION(nsnull != line, "can't find deleted frame in lines");
|
|
if (nsnull != prevSibling) {
|
|
nsIFrame* tmp;
|
|
prevSibling->GetNextSibling(&tmp);
|
|
NS_ASSERTION(tmp == aDeletedFrame, "bad prevSibling");
|
|
}
|
|
#endif
|
|
|
|
// Remove frame and all of its continuations
|
|
while (nsnull != aDeletedFrame) {
|
|
while ((nsnull != line) && (nsnull != aDeletedFrame)) {
|
|
#ifdef NS_DEBUG
|
|
nsIFrame* parent;
|
|
aDeletedFrame->GetParent(&parent);
|
|
NS_ASSERTION(flow == parent, "messed up delete code");
|
|
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
|
|
#endif
|
|
|
|
// See if the frame being deleted is the last one on the line
|
|
PRBool isLastFrameOnLine = PR_FALSE;
|
|
if (1 == line->mChildCount) {
|
|
isLastFrameOnLine = PR_TRUE;
|
|
}
|
|
else if (line->LastChild() == aDeletedFrame) {
|
|
isLastFrameOnLine = PR_TRUE;
|
|
}
|
|
|
|
// Remove aDeletedFrame from the line
|
|
nsIFrame* nextFrame;
|
|
aDeletedFrame->GetNextSibling(&nextFrame);
|
|
if (line->mFirstChild == aDeletedFrame) {
|
|
line->mFirstChild = nextFrame;
|
|
}
|
|
if (!line->IsBlock() && (nsnull != prevLine) && !prevLine->IsBlock()) {
|
|
// Make sure the previous line (if it's an inline line) gets
|
|
// a reflow too so that it can pullup from the line where we
|
|
// just removed the frame.
|
|
prevLine->MarkDirty();
|
|
// XXX Note: prevLine may be in a prev-in-flow
|
|
}
|
|
|
|
// Take aDeletedFrame out of the sibling list. Note that
|
|
// prevSibling will only be nsnull when we are deleting the very
|
|
// first frame.
|
|
if (nsnull != prevSibling) {
|
|
prevSibling->SetNextSibling(nextFrame);
|
|
}
|
|
|
|
// Destroy frame; capture its next-in-flow first in case we need
|
|
// to destroy that too.
|
|
nsIFrame* nextInFlow;
|
|
aDeletedFrame->GetNextInFlow(&nextInFlow);
|
|
nsSplittableType st;
|
|
aDeletedFrame->IsSplittable(st);
|
|
if (NS_FRAME_NOT_SPLITTABLE != st) {
|
|
aDeletedFrame->RemoveFromFlow();
|
|
}
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: prevLine=%p line=%p frame=",
|
|
prevLine, line);
|
|
nsFrame::ListTag(stdout, aDeletedFrame);
|
|
printf(" prevSibling=%p nextInFlow=%p\n", prevSibling, nextInFlow);
|
|
#endif
|
|
aDeletedFrame->DeleteFrame(aPresContext);
|
|
aDeletedFrame = nextInFlow;
|
|
|
|
// If line is empty, remove it now
|
|
nsLineBox* next = line->mNext;
|
|
if (0 == --line->mChildCount) {
|
|
*linep = next;
|
|
line->mNext = nsnull;
|
|
delete line;
|
|
line = next;
|
|
}
|
|
else {
|
|
// Make the line that just lost a frame dirty
|
|
line->MarkDirty();
|
|
|
|
// If we just removed the last frame on the line then we need
|
|
// to advance to the next line.
|
|
if (isLastFrameOnLine) {
|
|
prevLine = line;
|
|
linep = &line->mNext;
|
|
line = next;
|
|
}
|
|
}
|
|
|
|
// See if we should keep looking in the current flow's line list.
|
|
if (nsnull != aDeletedFrame) {
|
|
if (aDeletedFrame != nextFrame) {
|
|
// The deceased frames continuation is not the next frame in
|
|
// the current flow's frame list. Therefore we know that the
|
|
// continuation is in a different parent. So break out of
|
|
// the loop so that we advance to the next parent.
|
|
#ifdef NS_DEBUG
|
|
nsIFrame* parent;
|
|
aDeletedFrame->GetParent(&parent);
|
|
NS_ASSERTION(parent != flow, "strange continuation");
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Advance to next flow block if the frame has more continuations
|
|
if (nsnull != aDeletedFrame) {
|
|
flow = (nsBlockFrame*) flow->mNextInFlow;
|
|
NS_ASSERTION(nsnull != flow, "whoops, continuation without a parent");
|
|
prevLine = nsnull;
|
|
line = flow->mLines;
|
|
linep = &flow->mLines;
|
|
prevSibling = nsnull;
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
MarkEmptyLines(aPresContext);
|
|
return NS_OK;
|
|
}
|
|
|
|
static PRBool
|
|
IsEmptyLine(nsIPresContext& aPresContext, nsLineBox* aLine)
|
|
{
|
|
PRInt32 i, n = aLine->ChildCount();
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
for (i = 0; i < n; i++) {
|
|
nsIContent* content;
|
|
nsresult rv = frame->GetContent(&content);
|
|
if (NS_FAILED(rv) || (nsnull == content)) {
|
|
// If it doesn't have any content then this can't be an empty line
|
|
return PR_FALSE;
|
|
}
|
|
nsITextContent* tc;
|
|
rv = content->QueryInterface(kITextContentIID, (void**) &tc);
|
|
if (NS_FAILED(rv) || (nsnull == tc)) {
|
|
// If it's not text content then this can't be an empty line
|
|
NS_RELEASE(content);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
const nsTextFragment* frag;
|
|
PRInt32 numFrags;
|
|
rv = tc->GetText(frag, numFrags);
|
|
if (NS_FAILED(rv)) {
|
|
NS_RELEASE(content);
|
|
NS_RELEASE(tc);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// If the text has any non-whitespace characters in it then the
|
|
// line is not an empty line.
|
|
while (--numFrags >= 0) {
|
|
PRInt32 len = frag->GetLength();
|
|
if (frag->Is2b()) {
|
|
const PRUnichar* cp = frag->Get2b();
|
|
const PRUnichar* end = cp + len;
|
|
while (cp < end) {
|
|
PRUnichar ch = *cp++;
|
|
if (!XP_IS_SPACE(ch)) {
|
|
NS_RELEASE(tc);
|
|
NS_RELEASE(content);
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
const char* cp = frag->Get1b();
|
|
const char* end = cp + len;
|
|
while (cp < end) {
|
|
char ch = *cp++;
|
|
if (!XP_IS_SPACE(ch)) {
|
|
NS_RELEASE(tc);
|
|
NS_RELEASE(content);
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
frag++;
|
|
}
|
|
|
|
NS_RELEASE(tc);
|
|
NS_RELEASE(content);
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::MarkEmptyLines(nsIPresContext& aPresContext)
|
|
{
|
|
// PRE-formatted content considers whitespace significant
|
|
const nsStyleText* text;
|
|
GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) text);
|
|
if ((NS_STYLE_WHITESPACE_PRE == text->mWhiteSpace) ||
|
|
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == text->mWhiteSpace)) {
|
|
return;
|
|
}
|
|
|
|
PRBool afterBlock = PR_TRUE;
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
if (line->IsBlock()) {
|
|
afterBlock = PR_TRUE;
|
|
}
|
|
else if (afterBlock) {
|
|
afterBlock = PR_FALSE;
|
|
|
|
// This is an inline line and it is immediately after a block
|
|
// (or its our first line). See if it contains nothing but
|
|
// collapsible text.
|
|
PRBool isEmpty = IsEmptyLine(aPresContext, line);
|
|
line->SetIsEmptyLine(isEmpty);
|
|
}
|
|
else {
|
|
line->SetIsEmptyLine(PR_FALSE);
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteChildsNextInFlow(nsIPresContext& aPresContext,
|
|
nsIFrame* aChild)
|
|
{
|
|
NS_PRECONDITION(IsChild(aChild), "bad geometric parent");
|
|
nsIFrame* nextInFlow;
|
|
aChild->GetNextInFlow(&nextInFlow);
|
|
NS_PRECONDITION(nsnull != nextInFlow, "null next-in-flow");
|
|
nsBlockFrame* parent;
|
|
nextInFlow->GetParent((nsIFrame**)&parent);
|
|
NS_PRECONDITION(nsnull != parent, "next-in-flow with no parent");
|
|
NS_PRECONDITION(nsnull != parent->mLines, "next-in-flow with weird parent");
|
|
NS_PRECONDITION(nsnull == parent->mOverflowLines, "parent with overflow");
|
|
parent->DoRemoveFrame(aPresContext, nextInFlow);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// Floater support
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowFloater(nsBlockReflowState& aState,
|
|
nsPlaceholderFrame* aPlaceholder,
|
|
nsRect& aCombinedRect,
|
|
nsMargin& aMarginResult)
|
|
{
|
|
// Reflow the floater. Since floaters are continued we given them an
|
|
// unbounded height. Floaters with an auto width are sized to zero
|
|
// according to the css2 spec.
|
|
nsRect availSpace(0, 0, aState.mAvailSpaceRect.width, NS_UNCONSTRAINEDSIZE);
|
|
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
|
|
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
|
|
|
|
// Setup block reflow state to reflow the floater
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
|
|
aState.mComputeMaxElementSize);
|
|
brc.SetNextRCFrame(aState.mNextRCFrame);
|
|
|
|
// Reflow the floater
|
|
nsReflowStatus frameReflowStatus;
|
|
nsMargin computedOffsets;
|
|
nsresult rv = brc.ReflowBlock(floater, availSpace, PR_TRUE,
|
|
0, isAdjacentWithTop,
|
|
computedOffsets, frameReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Capture the margin information for the caller
|
|
const nsMargin& m = brc.GetMargin();
|
|
aMarginResult.top = brc.GetTopMargin();
|
|
aMarginResult.right = m.right;
|
|
aMarginResult.bottom =
|
|
nsBlockReflowContext::MaxMargin(brc.GetCarriedOutBottomMargin(),
|
|
m.bottom);
|
|
aMarginResult.left = m.left;
|
|
|
|
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
|
|
aCombinedRect = metrics.mCombinedArea;
|
|
floater->SizeTo(metrics.width, metrics.height);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockReflowState::InitFloater(nsPlaceholderFrame* aPlaceholder)
|
|
{
|
|
// Set the geometric parent of the floater
|
|
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
|
|
floater->SetParent(mBlock);
|
|
|
|
// Then add the floater to the current line and place it when
|
|
// appropriate
|
|
AddFloater(aPlaceholder, PR_TRUE);
|
|
}
|
|
|
|
// This is called by the line layout's AddFloater method when a
|
|
// place-holder frame is reflowed in a line. If the floater is a
|
|
// left-most child (it's x coordinate is at the line's left margin)
|
|
// then the floater is place immediately, otherwise the floater
|
|
// placement is deferred until the line has been reflowed.
|
|
void
|
|
nsBlockReflowState::AddFloater(nsPlaceholderFrame* aPlaceholder,
|
|
PRBool aInitialReflow)
|
|
{
|
|
NS_PRECONDITION(nsnull != mCurrentLine, "null ptr");
|
|
|
|
// Update the current line's floater array
|
|
if (nsnull == mCurrentLine->mFloaters) {
|
|
mCurrentLine->mFloaters = new nsVoidArray();
|
|
}
|
|
mCurrentLine->mFloaters->AppendElement(aPlaceholder);
|
|
|
|
// Now place the floater immediately if possible. Otherwise stash it
|
|
// away in mPendingFloaters and place it later.
|
|
if (mLineLayout->CanPlaceFloaterNow()) {
|
|
nsRect combinedArea;
|
|
nsMargin floaterMargins;
|
|
mBlock->ReflowFloater(*this, aPlaceholder, combinedArea, floaterMargins);
|
|
|
|
// Because we are in the middle of reflowing a placeholder frame
|
|
// within a line (and possibly nested in an inline frame or two
|
|
// that's a child of our block) we need to restore the space
|
|
// manager's translation to the space that the block resides in
|
|
// before placing the floater.
|
|
PRBool isLeftFloater;
|
|
nscoord ox, oy;
|
|
mSpaceManager->GetTranslation(ox, oy);
|
|
nscoord dx = ox - mSpaceManagerX;
|
|
nscoord dy = oy - mSpaceManagerY;
|
|
mSpaceManager->Translate(-dx, -dy);
|
|
nsPoint origin;
|
|
PlaceFloater(aPlaceholder, floaterMargins, &isLeftFloater, &origin);
|
|
|
|
// Update the floater combined-area
|
|
combinedArea.x += origin.x;
|
|
combinedArea.y += origin.y;
|
|
CombineRects(combinedArea, mFloaterCombinedArea);
|
|
|
|
// Pass on updated available space to the current inline reflow engine
|
|
GetAvailableSpace();
|
|
mLineLayout->UpdateBand(mAvailSpaceRect.x + BorderPadding().left, mY,
|
|
mAvailSpaceRect.width,
|
|
mAvailSpaceRect.height,
|
|
isLeftFloater);
|
|
|
|
// Restore coordinate system
|
|
mSpaceManager->Translate(dx, dy);
|
|
}
|
|
else {
|
|
// This floater will be placed after the line is done (it is a
|
|
// below current line floater).
|
|
mPendingFloaters.AppendElement(aPlaceholder);
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsBlockReflowState::IsLeftMostChild(nsIFrame* aFrame)
|
|
{
|
|
for (;;) {
|
|
nsIFrame* parent;
|
|
aFrame->GetParent(&parent);
|
|
if (parent == mBlock) {
|
|
nsIFrame* child = mCurrentLine->mFirstChild;
|
|
PRInt32 n = mCurrentLine->ChildCount();
|
|
while ((nsnull != child) && (aFrame != child) && (--n >= 0)) {
|
|
nsSize size;
|
|
|
|
// Is the child zero-sized?
|
|
child->GetSize(size);
|
|
if (size.width > 0) {
|
|
// We found a non-zero sized child frame that precedes aFrame
|
|
return PR_FALSE;
|
|
}
|
|
child->GetNextSibling(&child);
|
|
}
|
|
break;
|
|
}
|
|
else {
|
|
// See if there are any non-zero sized child frames that precede
|
|
// aFrame in the child list
|
|
nsIFrame* child;
|
|
parent->FirstChild(nsnull, &child);
|
|
while ((nsnull != child) && (aFrame != child)) {
|
|
nsSize size;
|
|
|
|
// Is the child zero-sized?
|
|
child->GetSize(size);
|
|
if (size.width > 0) {
|
|
// We found a non-zero sized child frame that precedes aFrame
|
|
return PR_FALSE;
|
|
}
|
|
child->GetNextSibling(&child);
|
|
}
|
|
}
|
|
|
|
// aFrame is the left-most non-zero sized frame in its geometric parent.
|
|
// Walk up one level and check that its parent is left-most as well
|
|
aFrame = parent;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockReflowState::CanPlaceFloater(const nsRect& aFloaterRect,
|
|
PRUint8 aFloats)
|
|
{
|
|
// If the current Y coordinate is not impacted by any floaters
|
|
// then by definition the floater fits.
|
|
PRBool result = PR_TRUE;
|
|
if (0 != mBand.GetFloaterCount()) {
|
|
if (mAvailSpaceRect.width < aFloaterRect.width) {
|
|
// The available width is too narrow (and its been impacted by a
|
|
// prior floater)
|
|
result = PR_FALSE;
|
|
}
|
|
else {
|
|
// At this point we know that there is enough horizontal space for
|
|
// the floater (somewhere). Lets see if there is enough vertical
|
|
// space.
|
|
if (mAvailSpaceRect.height < aFloaterRect.height) {
|
|
// The available height is too short. However, its possible that
|
|
// there is enough open space below which is not impacted by a
|
|
// floater.
|
|
//
|
|
// Compute the X coordinate for the floater based on its float
|
|
// type, assuming its placed on the current line. This is
|
|
// where the floater will be placed horizontally if it can go
|
|
// here.
|
|
nscoord x0;
|
|
if (NS_STYLE_FLOAT_LEFT == aFloats) {
|
|
x0 = mAvailSpaceRect.x;
|
|
}
|
|
else {
|
|
x0 = mAvailSpaceRect.XMost() - aFloaterRect.width;
|
|
|
|
// In case the floater is too big, don't go past the left edge
|
|
if (x0 < mAvailSpaceRect.x) {
|
|
x0 = mAvailSpaceRect.x;
|
|
}
|
|
}
|
|
nscoord x1 = x0 + aFloaterRect.width;
|
|
|
|
// Calculate the top and bottom y coordinates, again assuming
|
|
// that the floater is placed on the current line.
|
|
const nsMargin& borderPadding = BorderPadding();
|
|
nscoord y0 = mY - borderPadding.top;
|
|
if (y0 < 0) {
|
|
// CSS2 spec, 9.5.1 rule [4]: A floating box's outer top may not
|
|
// be higher than the top of its containing block.
|
|
|
|
// XXX It's not clear if it means the higher than the outer edge
|
|
// or the border edge or the inner edge?
|
|
y0 = 0;
|
|
}
|
|
nscoord y1 = y0 + aFloaterRect.height;
|
|
|
|
nscoord saveY = mY;
|
|
for (;;) {
|
|
// Get the available space at the new Y coordinate
|
|
mY += mAvailSpaceRect.height;
|
|
GetAvailableSpace();
|
|
|
|
if (0 == mBand.GetFloaterCount()) {
|
|
// Winner. This band has no floaters on it, therefore
|
|
// there can be no overlap.
|
|
break;
|
|
}
|
|
|
|
// Check and make sure the floater won't intersect any
|
|
// floaters on this band. The floaters starting and ending
|
|
// coordinates must be entirely in the available space.
|
|
if ((x0 < mAvailSpaceRect.x) || (x1 > mAvailSpaceRect.XMost())) {
|
|
// The floater can't go here.
|
|
result = PR_FALSE;
|
|
break;
|
|
}
|
|
|
|
// See if there is now enough height for the floater.
|
|
if (y1 < mY + mAvailSpaceRect.height) {
|
|
// Winner. The bottom Y coordinate of the floater is in
|
|
// this band.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Restore Y coordinate and available space information
|
|
// regardless of the outcome.
|
|
mY = saveY;
|
|
GetAvailableSpace();
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsBlockReflowState::PlaceFloater(nsPlaceholderFrame* aPlaceholder,
|
|
const nsMargin& aFloaterMargins,
|
|
PRBool* aIsLeftFloater,
|
|
nsPoint* aNewOrigin)
|
|
{
|
|
// Save away the Y coordinate before placing the floater. We will
|
|
// restore mY at the end after placing the floater. This is
|
|
// necessary because any adjustments to mY during the floater
|
|
// placement are for the floater only, not for any non-floating
|
|
// content.
|
|
nscoord saveY = mY;
|
|
nsIFrame* floater = aPlaceholder->GetAnchoredItem();
|
|
|
|
// Get the type of floater
|
|
const nsStyleDisplay* floaterDisplay;
|
|
const nsStyleSpacing* floaterSpacing;
|
|
floater->GetStyleData(eStyleStruct_Display,
|
|
(const nsStyleStruct*&)floaterDisplay);
|
|
floater->GetStyleData(eStyleStruct_Spacing,
|
|
(const nsStyleStruct*&)floaterSpacing);
|
|
|
|
// See if the floater should clear any preceeding floaters...
|
|
if (NS_STYLE_CLEAR_NONE != floaterDisplay->mBreakType) {
|
|
ClearFloaters(mY, floaterDisplay->mBreakType);
|
|
}
|
|
else {
|
|
// Get the band of available space
|
|
GetAvailableSpace();
|
|
}
|
|
|
|
// Get the floaters bounding box and margin information
|
|
nsRect region;
|
|
floater->GetRect(region);
|
|
|
|
// Adjust the floater size by its margin. That's the area that will
|
|
// impact the space manager.
|
|
region.width += aFloaterMargins.left + aFloaterMargins.right;
|
|
region.height += aFloaterMargins.top + aFloaterMargins.bottom;
|
|
|
|
// Find a place to place the floater. The CSS2 spec doesn't want
|
|
// floaters overlapping each other or sticking out of the containing
|
|
// block if possible (CSS2 spec section 9.5.1, see the rule list).
|
|
NS_ASSERTION((NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) ||
|
|
(NS_STYLE_FLOAT_RIGHT == floaterDisplay->mFloats),
|
|
"invalid float type");
|
|
|
|
// While there is not enough room for the floater, clear past other
|
|
// floaters until there is room (or the band is not impacted by a
|
|
// floater).
|
|
//
|
|
// Note: The CSS2 spec says that floaters should be placed as high
|
|
// as possible.
|
|
while (!CanPlaceFloater(region, floaterDisplay->mFloats)) {
|
|
mY += mAvailSpaceRect.height;
|
|
GetAvailableSpace();
|
|
}
|
|
|
|
// Assign an x and y coordinate to the floater. Note that the x,y
|
|
// coordinates are computed <b>relative to the translation in the
|
|
// spacemanager</b> which means that the impacted region will be
|
|
// <b>inside</b> the border/padding area.
|
|
if (NS_STYLE_FLOAT_LEFT == floaterDisplay->mFloats) {
|
|
*aIsLeftFloater = PR_TRUE;
|
|
region.x = mAvailSpaceRect.x;
|
|
}
|
|
else {
|
|
*aIsLeftFloater = PR_FALSE;
|
|
region.x = mAvailSpaceRect.XMost() - region.width;
|
|
|
|
// In case the floater is too big, don't go past the left edge
|
|
if (region.x < mAvailSpaceRect.x) {
|
|
region.x = mAvailSpaceRect.x;
|
|
}
|
|
}
|
|
const nsMargin& borderPadding = BorderPadding();
|
|
region.y = mY - borderPadding.top;
|
|
if (region.y < 0) {
|
|
// CSS2 spec, 9.5.1 rule [4]: A floating box's outer top may not
|
|
// be higher than the top of its containing block.
|
|
|
|
// XXX It's not clear if it means the higher than the outer edge
|
|
// or the border edge or the inner edge?
|
|
region.y = 0;
|
|
}
|
|
|
|
// Place the floater in the space manager
|
|
mSpaceManager->AddRectRegion(floater, region);
|
|
|
|
// Set the origin of the floater frame, in frame coordinates. These
|
|
// coordinates are <b>not</b> relative to the spacemanager
|
|
// translation, therefore we have to factor in our border/padding.
|
|
nscoord x = borderPadding.left + aFloaterMargins.left + region.x;
|
|
nscoord y = borderPadding.top + aFloaterMargins.top + region.y;
|
|
floater->MoveTo(x, y);
|
|
if (aNewOrigin) {
|
|
aNewOrigin->x = x;
|
|
aNewOrigin->y = y;
|
|
}
|
|
|
|
// Now restore mY
|
|
mY = saveY;
|
|
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (mReflowState.reason == eReflowReason_Incremental) {
|
|
nsRect r;
|
|
floater->GetRect(r);
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("placed floater: ");
|
|
((nsFrame*)floater)->ListTag(stdout);
|
|
printf(" %d,%d,%d,%d\n", r.x, r.y, r.width, r.height);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Place below-current-line floaters.
|
|
*/
|
|
void
|
|
nsBlockReflowState::PlaceBelowCurrentLineFloaters(nsVoidArray* aFloaters,
|
|
PRBool aReflowFloaters)
|
|
{
|
|
NS_PRECONDITION(aFloaters->Count() > 0, "no floaters");
|
|
|
|
PRInt32 numFloaters = aFloaters->Count();
|
|
for (PRInt32 i = 0; i < numFloaters; i++) {
|
|
nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)
|
|
aFloaters->ElementAt(i);
|
|
if (!IsLeftMostChild(placeholderFrame)) {
|
|
// XXX_perf
|
|
// Before we can place it we have to reflow it
|
|
nsRect combinedArea;
|
|
nsMargin floaterMargins;
|
|
mBlock->ReflowFloater(*this, placeholderFrame, combinedArea,
|
|
floaterMargins);
|
|
|
|
PRBool isLeftFloater;
|
|
nsPoint origin;
|
|
PlaceFloater(placeholderFrame, floaterMargins, &isLeftFloater,
|
|
&origin);
|
|
|
|
// Update the floater combined-area
|
|
combinedArea.x += origin.x;
|
|
combinedArea.y += origin.y;
|
|
CombineRects(combinedArea, mFloaterCombinedArea);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Place current-line floaters.
|
|
*/
|
|
void
|
|
nsBlockReflowState::PlaceCurrentLineFloaters(nsVoidArray* aFloaters)
|
|
{
|
|
NS_PRECONDITION(aFloaters->Count() > 0, "no floaters");
|
|
|
|
PRInt32 numFloaters = aFloaters->Count();
|
|
for (PRInt32 i = 0; i < numFloaters; i++) {
|
|
nsPlaceholderFrame* placeholderFrame = (nsPlaceholderFrame*)
|
|
aFloaters->ElementAt(i);
|
|
if (IsLeftMostChild(placeholderFrame)) {
|
|
// XXX_perf
|
|
// Before we can place it we have to reflow it
|
|
nsRect combinedArea;
|
|
nsMargin floaterMargins;
|
|
mBlock->ReflowFloater(*this, placeholderFrame, combinedArea,
|
|
floaterMargins);
|
|
|
|
PRBool isLeftFloater;
|
|
nsPoint origin;
|
|
PlaceFloater(placeholderFrame, floaterMargins, &isLeftFloater, &origin);
|
|
|
|
// Update the floater combined-area
|
|
combinedArea.x += origin.x;
|
|
combinedArea.y += origin.y;
|
|
CombineRects(combinedArea, mFloaterCombinedArea);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockReflowState::ClearFloaters(nscoord aY, PRUint8 aBreakType)
|
|
{
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (mReflowState.reason == eReflowReason_Incremental) {
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("clear floaters: in: mY=%d aY=%d(%d)\n",
|
|
mY, aY, aY - BorderPadding().top);
|
|
}
|
|
#endif
|
|
|
|
const nsMargin& bp = BorderPadding();
|
|
nscoord newY = mBand.ClearFloaters(aY - bp.top, aBreakType);
|
|
mY = newY + bp.top;
|
|
GetAvailableSpace();
|
|
|
|
#ifdef NOISY_INCREMENTAL_REFLOW
|
|
if (mReflowState.reason == eReflowReason_Incremental) {
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("clear floaters: out: mY=%d(%d)\n", mY, mY - bp.top);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Painting, event handling
|
|
|
|
PRIntn
|
|
nsBlockFrame::GetSkipSides() const
|
|
{
|
|
PRIntn skip = 0;
|
|
if (nsnull != mPrevInFlow) {
|
|
skip |= 1 << NS_SIDE_TOP;
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
skip |= 1 << NS_SIDE_BOTTOM;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
#ifdef NOISY_DAMAGE_REPAIR
|
|
static void ComputeCombinedArea(nsLineBox* aLine,
|
|
nscoord aWidth, nscoord aHeight,
|
|
nsRect& aResult)
|
|
{
|
|
nscoord x0 = 0, y0 = 0, x1 = aWidth, y1 = aHeight;
|
|
while (nsnull != aLine) {
|
|
// Compute min and max x/y values for the reflowed frame's
|
|
// combined areas
|
|
nscoord x = aLine->mCombinedArea.x;
|
|
nscoord y = aLine->mCombinedArea.y;
|
|
nscoord xmost = x + aLine->mCombinedArea.width;
|
|
nscoord ymost = y + aLine->mCombinedArea.height;
|
|
if (x < x0) {
|
|
x0 = x;
|
|
}
|
|
if (xmost > x1) {
|
|
x1 = xmost;
|
|
}
|
|
if (y < y0) {
|
|
y0 = y;
|
|
}
|
|
if (ymost > y1) {
|
|
y1 = ymost;
|
|
}
|
|
aLine = aLine->mNext;
|
|
}
|
|
|
|
aResult.x = x0;
|
|
aResult.y = y0;
|
|
aResult.width = x1 - x0;
|
|
aResult.height = y1 - y0;
|
|
}
|
|
#endif
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Paint(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer)
|
|
{
|
|
#ifdef NOISY_DAMAGE_REPAIR
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
PRInt32 depth = GetDepth();
|
|
nsRect ca;
|
|
ComputeCombinedArea(mLines, mRect.width, mRect.height, ca);
|
|
nsFrame::IndentBy(stdout, depth);
|
|
ListTag(stdout);
|
|
printf(": bounds=%d,%d,%d,%d dirty=%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);
|
|
}
|
|
#endif
|
|
|
|
const nsStyleDisplay* disp = (const nsStyleDisplay*)
|
|
mStyleContext->GetStyleData(eStyleStruct_Display);
|
|
|
|
// If overflow is hidden then set the clip rect so that children
|
|
// don't leak out of us
|
|
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
|
|
aRenderingContext.PushState();
|
|
SetClipRect(aRenderingContext);
|
|
}
|
|
|
|
// Only paint the border and background if we're visible
|
|
if (disp->mVisible && (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) &&
|
|
(0 != mRect.width) && (0 != mRect.height)) {
|
|
PRIntn skipSides = GetSkipSides();
|
|
const nsStyleColor* color = (const nsStyleColor*)
|
|
mStyleContext->GetStyleData(eStyleStruct_Color);
|
|
const nsStyleSpacing* spacing = (const nsStyleSpacing*)
|
|
mStyleContext->GetStyleData(eStyleStruct_Spacing);
|
|
|
|
// Paint background and border
|
|
nsRect rect(0, 0, mRect.width, mRect.height);
|
|
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
|
|
aDirtyRect, rect, *color, *spacing, 0, 0);
|
|
nsCSSRendering::PaintBorder(aPresContext, aRenderingContext, this,
|
|
aDirtyRect, rect, *spacing, mStyleContext,
|
|
skipSides);
|
|
}
|
|
|
|
// Child elements have the opportunity to override the visibility
|
|
// property and display even if the parent is hidden
|
|
if (NS_FRAME_PAINT_LAYER_FLOATERS == aWhichLayer) {
|
|
PaintFloaters(aPresContext, aRenderingContext, aDirtyRect);
|
|
}
|
|
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
|
|
|
|
if (NS_STYLE_OVERFLOW_HIDDEN == disp->mOverflow) {
|
|
PRBool clipState;
|
|
aRenderingContext.PopState(clipState);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PaintFloaters(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
|
|
nsVoidArray* floaters = line->mFloaters;
|
|
if (nsnull == floaters) {
|
|
continue;
|
|
}
|
|
PRInt32 i, n = floaters->Count();
|
|
for (i = 0; i < n; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) floaters->ElementAt(i);
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
ph->GetAnchoredItem(), NS_FRAME_PAINT_LAYER_BACKGROUND);
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
ph->GetAnchoredItem(), NS_FRAME_PAINT_LAYER_FLOATERS);
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
ph->GetAnchoredItem(), NS_FRAME_PAINT_LAYER_FOREGROUND);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PaintChildren(nsIPresContext& aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer)
|
|
{
|
|
#ifdef NOISY_DAMAGE_REPAIR
|
|
PRInt32 depth = 0;
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
depth = GetDepth();
|
|
}
|
|
#endif
|
|
for (nsLineBox* line = mLines; nsnull != line; line = line->mNext) {
|
|
// If the line has outside children or if the line intersects the
|
|
// dirty rect then paint the children in the line.
|
|
if ((NS_FRAME_OUTSIDE_CHILDREN & mState) ||
|
|
!((line->mCombinedArea.YMost() <= aDirtyRect.y) ||
|
|
(line->mCombinedArea.y >= aDirtyRect.YMost()))) {
|
|
#ifdef NOISY_DAMAGE_REPAIR
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
nsFrame::IndentBy(stdout, depth+1);
|
|
printf("draw line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
line, line->mBounds.x, line->mBounds.y,
|
|
line->mBounds.width, line->mBounds.height,
|
|
line->mCombinedArea.x, line->mCombinedArea.y,
|
|
line->mCombinedArea.width, line->mCombinedArea.height);
|
|
}
|
|
#endif
|
|
nsIFrame* kid = line->mFirstChild;
|
|
PRInt32 n = line->ChildCount();
|
|
while (--n >= 0) {
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
|
|
aWhichLayer);
|
|
kid->GetNextSibling(&kid);
|
|
}
|
|
}
|
|
#ifdef NOISY_DAMAGE_REPAIR
|
|
else {
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
nsFrame::IndentBy(stdout, depth+1);
|
|
printf("skip line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
line, line->mBounds.x, line->mBounds.y,
|
|
line->mBounds.width, line->mBounds.height,
|
|
line->mCombinedArea.x, line->mCombinedArea.y,
|
|
line->mCombinedArea.width, line->mCombinedArea.height);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
|
|
if ((nsnull != mBullet) && HaveOutsideBullet()) {
|
|
// Paint outside bullets manually
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
|
|
aWhichLayer);
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::HandleEvent(nsIPresContext& aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus& aEventStatus)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame)
|
|
{
|
|
nsresult rv = GetFrameForPointUsing(aPoint, nsnull, aFrame);
|
|
if (NS_OK == rv) {
|
|
return NS_OK;
|
|
}
|
|
if (nsnull != mBullet) {
|
|
rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::bulletList, aFrame);
|
|
if (NS_OK == rv) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
if (mFloaters.NotEmpty()) {
|
|
rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::floaterList, aFrame);
|
|
if (NS_OK == rv) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Debugging
|
|
|
|
#ifdef NS_DEBUG
|
|
static PRBool
|
|
InLineList(nsLineBox* aLines, nsIFrame* aFrame)
|
|
{
|
|
while (nsnull != aLines) {
|
|
nsIFrame* frame = aLines->mFirstChild;
|
|
PRInt32 n = aLines->ChildCount();
|
|
while (--n >= 0) {
|
|
if (frame == aFrame) {
|
|
return PR_TRUE;
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
aLines = aLines->mNext;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
static PRBool
|
|
InSiblingList(nsLineBox* aLine, nsIFrame* aFrame)
|
|
{
|
|
if (nsnull != aLine) {
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
while (nsnull != frame) {
|
|
if (frame == aFrame) {
|
|
return PR_TRUE;
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::IsChild(nsIFrame* aFrame)
|
|
{
|
|
nsIFrame* parent;
|
|
aFrame->GetParent(&parent);
|
|
if (parent != (nsIFrame*)this) {
|
|
return PR_FALSE;
|
|
}
|
|
if (InLineList(mLines, aFrame) && InSiblingList(mLines, aFrame)) {
|
|
return PR_TRUE;
|
|
}
|
|
if (InLineList(mOverflowLines, aFrame) &&
|
|
InSiblingList(mOverflowLines, aFrame)) {
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
#endif
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::VerifyTree() const
|
|
{
|
|
// XXX rewrite this
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Init(nsIPresContext& aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
if (aPrevInFlow) {
|
|
// Copy over the block/area frame flags
|
|
nsBlockFrame* blockFrame = (nsBlockFrame*)aPrevInFlow;
|
|
|
|
SetFlags(blockFrame->mFlags);
|
|
}
|
|
|
|
nsresult rv = nsBlockFrameSuper::Init(aPresContext, aContent, aParent,
|
|
aContext, aPrevInFlow);
|
|
if (nsBlockReflowContext::IsHTMLParagraph(this)) {
|
|
mState |= NS_BLOCK_IS_HTML_PARAGRAPH;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::SetInitialChildList(nsIPresContext& aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
if (nsLayoutAtoms::floaterList == aListName) {
|
|
mFloaters.SetFrames(aChildList);
|
|
}
|
|
else {
|
|
rv = AppendNewFrames(aPresContext, aChildList);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Create 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).
|
|
const nsStyleDisplay* styleDisplay;
|
|
GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) styleDisplay);
|
|
if ((nsnull == mPrevInFlow) &&
|
|
(NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) &&
|
|
(nsnull == mBullet)) {
|
|
// Resolve style for the bullet frame
|
|
nsIStyleContext* kidSC;
|
|
aPresContext.ResolvePseudoStyleContextFor(mContent,
|
|
nsHTMLAtoms::mozListBulletPseudo,
|
|
mStyleContext, PR_FALSE, &kidSC);
|
|
|
|
// Create bullet frame
|
|
mBullet = new nsBulletFrame;
|
|
if (nsnull == mBullet) {
|
|
NS_RELEASE(kidSC);
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mBullet->Init(aPresContext, mContent, this, kidSC, nsnull);
|
|
NS_RELEASE(kidSC);
|
|
|
|
// If the list bullet frame should be positioned inside then add
|
|
// it to the flow now.
|
|
const nsStyleList* styleList;
|
|
GetStyleData(eStyleStruct_List, (const nsStyleStruct*&) styleList);
|
|
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
|
|
InsertNewFrames(aPresContext, mBullet, nsnull);
|
|
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
else {
|
|
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
}
|
|
|
|
// Lookup up the two pseudo style contexts
|
|
if (nsnull == mPrevInFlow) {
|
|
aPresContext.
|
|
ProbePseudoStyleContextFor(mContent, nsHTMLAtoms::firstLinePseudo,
|
|
mStyleContext, PR_FALSE, &mFirstLineStyle);
|
|
aPresContext.
|
|
ProbePseudoStyleContextFor(mContent, nsHTMLAtoms::firstLetterPseudo,
|
|
(nsnull != mFirstLineStyle
|
|
? mFirstLineStyle
|
|
: mStyleContext),
|
|
PR_FALSE, &mFirstLetterStyle);
|
|
#ifdef NOISY_FIRST_LETTER
|
|
if (nsnull != mFirstLetterStyle) {
|
|
printf("block(%d)@%p: first-letter style found\n",
|
|
ContentIndexInContainer(this), this);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RenumberLists()
|
|
{
|
|
// Setup initial list ordinal value
|
|
PRInt32 ordinal = 1;
|
|
nsIHTMLContent* hc;
|
|
if (mContent && (NS_OK == mContent->QueryInterface(kIHTMLContentIID, (void**) &hc))) {
|
|
nsHTMLValue value;
|
|
if (NS_CONTENT_ATTR_HAS_VALUE ==
|
|
hc->GetHTMLAttribute(nsHTMLAtoms::start, value)) {
|
|
if (eHTMLUnit_Integer == value.GetUnit()) {
|
|
ordinal = value.GetIntValue();
|
|
if (ordinal <= 0) {
|
|
ordinal = 1;
|
|
}
|
|
}
|
|
}
|
|
NS_RELEASE(hc);
|
|
}
|
|
|
|
// Get to first-in-flow
|
|
nsBlockFrame* block = this;
|
|
while (nsnull != block->mPrevInFlow) {
|
|
block = (nsBlockFrame*) block->mPrevInFlow;
|
|
}
|
|
|
|
// For each flow-block...
|
|
while (nsnull != block) {
|
|
// For each frame in the flow-block...
|
|
nsIFrame* frame = block->mLines ? block->mLines->mFirstChild : nsnull;
|
|
while (nsnull != frame) {
|
|
// If the frame is a list-item and the frame implements our
|
|
// block frame API then get it's bullet and set the list item
|
|
// ordinal.
|
|
const nsStyleDisplay* display;
|
|
frame->GetStyleData(eStyleStruct_Display,
|
|
(const nsStyleStruct*&) display);
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
|
|
// Make certain that the frame isa block-frame in case
|
|
// something foriegn has crept in.
|
|
nsBlockFrame* listItem;
|
|
if (NS_OK == frame->QueryInterface(kBlockFrameCID,
|
|
(void**) &listItem)) {
|
|
if (nsnull != listItem->mBullet) {
|
|
ordinal =
|
|
listItem->mBullet->SetListItemOrdinal(ordinal);
|
|
}
|
|
}
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
block = (nsBlockFrame*) block->mNextInFlow;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowBullet(nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
// Reflow the bullet now
|
|
nsSize availSize;
|
|
availSize.width = NS_UNCONSTRAINEDSIZE;
|
|
availSize.height = NS_UNCONSTRAINEDSIZE;
|
|
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
|
|
mBullet, availSize);
|
|
reflowState.lineLayout = aState.mLineLayout;
|
|
nsIHTMLReflow* htmlReflow;
|
|
nsresult rv = mBullet->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
nsReflowStatus status;
|
|
htmlReflow->WillReflow(aState.mPresContext);
|
|
htmlReflow->Reflow(aState.mPresContext, aMetrics, reflowState, status);
|
|
htmlReflow->DidReflow(aState.mPresContext, NS_FRAME_REFLOW_FINISHED);
|
|
}
|
|
|
|
// Place the bullet now; use its right margin to distance it
|
|
// from the rest of the frames in the line
|
|
const nsMargin& bp = aState.BorderPadding();
|
|
nscoord x = bp.left - reflowState.computedMargin.right - aMetrics.width;
|
|
|
|
// Approximate the bullets position; vertical alignment will provide
|
|
// the final vertical location.
|
|
nscoord y = bp.top;
|
|
mBullet->SetRect(nsRect(x, y, aMetrics.width, aMetrics.height));
|
|
}
|
|
|
|
//XXX get rid of this -- its slow
|
|
void
|
|
nsBlockFrame::BuildFloaterList()
|
|
{
|
|
nsIFrame* head = nsnull;
|
|
nsIFrame* current = nsnull;
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
if (nsnull != line->mFloaters) {
|
|
nsVoidArray& array = *line->mFloaters;
|
|
PRInt32 i, n = array.Count();
|
|
for (i = 0; i < n; i++) {
|
|
nsPlaceholderFrame* ph = (nsPlaceholderFrame*) array[i];
|
|
nsIFrame* floater = ph->GetAnchoredItem();
|
|
if (nsnull == head) {
|
|
current = head = floater;
|
|
}
|
|
else {
|
|
current->SetNextSibling(floater);
|
|
current = floater;
|
|
}
|
|
}
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
|
|
// Terminate end of floater list just in case a floater was removed
|
|
if (nsnull != current) {
|
|
current->SetNextSibling(nsnull);
|
|
}
|
|
mFloaters.SetFrames(head);
|
|
}
|
|
|
|
// XXX keep the text-run data in the first-in-flow of the block
|
|
|
|
// XXX Switch to an interface to pass to child frames -or- do the
|
|
// grovelling directly ourselves?
|
|
nsresult
|
|
nsBlockFrame::ComputeTextRuns(nsIPresContext& aPresContext)
|
|
{
|
|
// Destroy old run information first
|
|
nsTextRun::DeleteTextRuns(mTextRuns);
|
|
mTextRuns = nsnull;
|
|
|
|
nsLineLayout textRunThingy(aPresContext);
|
|
|
|
// Ask each child to find its text runs
|
|
nsLineBox* line = mLines;
|
|
while (nsnull != line) {
|
|
if (!line->IsBlock()) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
PRInt32 n = line->ChildCount();
|
|
while (--n >= 0) {
|
|
nsIHTMLReflow* hr;
|
|
if (NS_OK == frame->QueryInterface(kIHTMLReflowIID, (void**)&hr)) {
|
|
nsresult rv = hr->FindTextRuns(textRunThingy);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
}
|
|
else {
|
|
// A frame that doesn't implement nsIHTMLReflow isn't text
|
|
// therefore it will end an open text run.
|
|
textRunThingy.EndTextRun();
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
}
|
|
else {
|
|
// A block frame isn't text therefore it will end an open text
|
|
// run.
|
|
textRunThingy.EndTextRun();
|
|
}
|
|
line = line->mNext;
|
|
}
|
|
textRunThingy.EndTextRun();
|
|
|
|
// Now take the text-runs away from the line layout engine.
|
|
mTextRuns = textRunThingy.TakeTextRuns();
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsresult
|
|
NS_NewAnonymousBlockFrame(nsIFrame*& aNewFrame)
|
|
{
|
|
nsBlockFrame* it = new nsAnonymousBlockFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAnonymousBlockFrame::nsAnonymousBlockFrame()
|
|
{
|
|
}
|
|
|
|
nsAnonymousBlockFrame::~nsAnonymousBlockFrame()
|
|
{
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsAnonymousBlockFrame::AppendFrames(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
return mParent->AppendFrames(aPresContext, aPresShell, aListName,
|
|
aFrameList);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsAnonymousBlockFrame::InsertFrames(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
return mParent->InsertFrames(aPresContext, aPresShell, aListName,
|
|
aPrevFrame, aFrameList);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsAnonymousBlockFrame::RemoveFrame(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
return mParent->RemoveFrame(aPresContext, aPresShell, aListName,
|
|
aOldFrame);
|
|
}
|
|
|
|
nsresult
|
|
nsAnonymousBlockFrame::AppendFrames2(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
return nsAnonymousBlockFrameSuper::AppendFrames(aPresContext, aPresShell,
|
|
aListName, aFrameList);
|
|
}
|
|
|
|
nsresult
|
|
nsAnonymousBlockFrame::InsertFrames2(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
return nsAnonymousBlockFrameSuper::InsertFrames(aPresContext, aPresShell,
|
|
aListName, aPrevFrame,
|
|
aFrameList);
|
|
}
|
|
|
|
nsresult
|
|
nsAnonymousBlockFrame::RemoveFrame2(nsIPresContext& aPresContext,
|
|
nsIPresShell& aPresShell,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
return nsAnonymousBlockFrameSuper::RemoveFrame(aPresContext, aPresShell,
|
|
aListName, aOldFrame);
|
|
}
|
|
|
|
void
|
|
nsAnonymousBlockFrame::RemoveFirstFrame()
|
|
{
|
|
nsLineBox* line = mLines;
|
|
if (nsnull != line) {
|
|
nsIFrame* firstChild = line->mFirstChild;
|
|
|
|
// If the line has floaters on it, see if the frame being removed
|
|
// is a placeholder frame. If it is, then remove it from the lines
|
|
// floater array and from the block frames floater child list.
|
|
if (nsnull != line->mFloaters) {
|
|
// XXX UNTESTED!
|
|
nsPlaceholderFrame* placeholderFrame;
|
|
nsVoidArray& floaters = *line->mFloaters;
|
|
PRInt32 i, n = floaters.Count();
|
|
for (i = 0; i < n; i++) {
|
|
placeholderFrame = (nsPlaceholderFrame*) floaters[i];
|
|
if (firstChild == placeholderFrame) {
|
|
// Remove placeholder from the line's floater array
|
|
floaters.RemoveElementAt(i);
|
|
if (0 == floaters.Count()) {
|
|
delete line->mFloaters;
|
|
line->mFloaters = nsnull;
|
|
}
|
|
|
|
// Remove the floater from the block frames mFloaters list too
|
|
mFloaters.RemoveFrame(placeholderFrame->GetAnchoredItem());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (1 == line->mChildCount) {
|
|
// Remove line when last frame goes away
|
|
mLines = line->mNext;
|
|
delete line;
|
|
}
|
|
else {
|
|
// Remove frame from line and mark the line dirty
|
|
--line->mChildCount;
|
|
line->MarkDirty();
|
|
firstChild->GetNextSibling(&line->mFirstChild);
|
|
}
|
|
|
|
// Break linkage to next child after stolen frame
|
|
firstChild->SetNextSibling(nsnull);
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsAnonymousBlockFrame::RemoveFramesFrom(nsIFrame* aFrame)
|
|
{
|
|
nsLineBox* line = mLines;
|
|
if (nsnull != line) {
|
|
// Chop the child sibling list into two pieces
|
|
nsFrameList tmp(line->mFirstChild);
|
|
nsIFrame* prevSibling = tmp.GetPrevSiblingFor(aFrame);
|
|
if (nsnull != prevSibling) {
|
|
// Chop the sibling list into two pieces
|
|
prevSibling->SetNextSibling(nsnull);
|
|
|
|
nsLineBox* prevLine = nsnull;
|
|
while (nsnull != line) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
PRInt32 i, n = line->mChildCount;
|
|
PRBool done = PR_FALSE;
|
|
for (i = 0; i < n; i++) {
|
|
if (frame == aFrame) {
|
|
// We just found the target frame (and the line its in and
|
|
// the previous line)
|
|
if (frame == line->mFirstChild) {
|
|
// No more children on this line, so let it get removed
|
|
prevLine->mNext = nsnull;
|
|
}
|
|
else {
|
|
// The only frames that remain on this line are the
|
|
// frames preceeding aFrame. Adjust the count to
|
|
// indicate that fact.
|
|
line->mChildCount = i;
|
|
|
|
// Remove the lines that follow this line
|
|
prevLine = line;
|
|
line = line->mNext;
|
|
prevLine->mNext = nsnull;
|
|
}
|
|
done = PR_TRUE;
|
|
break;
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
if (done) {
|
|
break;
|
|
}
|
|
prevLine = line;
|
|
line = line->mNext;
|
|
}
|
|
}
|
|
|
|
// Remove all of the remaining lines
|
|
while (nsnull != line) {
|
|
nsLineBox* next = line->mNext;
|
|
delete line;
|
|
line = next;
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyFrameCount(mLines);
|
|
#endif
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsBlockFrame::VerifyFrameCount(nsLineBox* line)
|
|
{
|
|
if (line) {
|
|
// First add up the counts on each line
|
|
nsLineBox* line0 = line;
|
|
PRInt32 count = 0;
|
|
while (nsnull != line) {
|
|
count += line->mChildCount;
|
|
line = line->mNext;
|
|
}
|
|
|
|
// Then count the frames
|
|
PRInt32 frameCount = 0;
|
|
nsIFrame* frame = line0->mFirstChild;
|
|
while (nsnull != frame) {
|
|
frameCount++;
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
NS_ASSERTION(count == frameCount, "bad line list");
|
|
|
|
// Next: test that each line has right number of frames on it
|
|
line = line0;
|
|
nsLineBox* prevLine = nsnull;
|
|
while (nsnull != line) {
|
|
count = line->mChildCount;
|
|
frame = line->mFirstChild;
|
|
while (--count >= 0) {
|
|
frame->GetNextSibling(&frame);
|
|
}
|
|
prevLine = line;
|
|
line = line->mNext;
|
|
if ((nsnull != line) && (0 != line->mChildCount)) {
|
|
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Its possible that a frame can have some frames on an overflow
|
|
// list. But its never possible for multiple frames to have overflow
|
|
// lists. Check that this fact is actually true.
|
|
void
|
|
nsBlockFrame::VerifyOverflowSituation()
|
|
{
|
|
PRBool haveOverflow = PR_FALSE;
|
|
nsBlockFrame* flow = (nsBlockFrame*) GetFirstInFlow();
|
|
while (nsnull != flow) {
|
|
if (nsnull != flow->mOverflowLines) {
|
|
NS_ASSERTION(nsnull != flow->mOverflowLines->mFirstChild,
|
|
"bad overflow list");
|
|
NS_ASSERTION(!haveOverflow, "two frames with overflow lists");
|
|
haveOverflow = PR_TRUE;
|
|
}
|
|
flow = (nsBlockFrame*) flow->mNextInFlow;
|
|
}
|
|
}
|
|
|
|
PRInt32
|
|
nsBlockFrame::GetDepth() const
|
|
{
|
|
PRInt32 depth = 0;
|
|
nsIFrame* parent = mParent;
|
|
while (nsnull != parent) {
|
|
parent->GetParent(&parent);
|
|
depth++;
|
|
}
|
|
return depth;
|
|
}
|
|
#endif
|