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ef7e43f284
We can replace `mBits` with `EnumSet<LogicalSide>` in `LogicalSides` so that `LogicalSideBits` is not relavent. Differential Revision: https://phabricator.services.mozilla.com/D207906
1082 lines
40 KiB
C++
1082 lines
40 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* rendering object for CSS display:inline objects */
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#include "nsInlineFrame.h"
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#include "gfxContext.h"
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#include "mozilla/ComputedStyle.h"
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#include "mozilla/Likely.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/SVGTextFrame.h"
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#include "nsLineLayout.h"
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#include "nsBlockFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsPlaceholderFrame.h"
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#include "nsGkAtoms.h"
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#include "nsPresContext.h"
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#include "nsPresContextInlines.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsDisplayList.h"
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#include "nsStyleChangeList.h"
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#ifdef DEBUG
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# undef NOISY_PUSHING
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#endif
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using namespace mozilla;
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using namespace mozilla::layout;
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//////////////////////////////////////////////////////////////////////
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// Basic nsInlineFrame methods
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nsInlineFrame* NS_NewInlineFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
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return new (aPresShell) nsInlineFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsInlineFrame)
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NS_QUERYFRAME_HEAD(nsInlineFrame)
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NS_QUERYFRAME_ENTRY(nsInlineFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
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#ifdef DEBUG_FRAME_DUMP
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nsresult nsInlineFrame::GetFrameName(nsAString& aResult) const {
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return MakeFrameName(u"Inline"_ns, aResult);
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}
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#endif
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void nsInlineFrame::InvalidateFrame(uint32_t aDisplayItemKey,
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bool aRebuildDisplayItems) {
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if (IsInSVGTextSubtree()) {
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nsIFrame* svgTextFrame = nsLayoutUtils::GetClosestFrameOfType(
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GetParent(), LayoutFrameType::SVGText);
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svgTextFrame->InvalidateFrame();
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return;
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}
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nsContainerFrame::InvalidateFrame(aDisplayItemKey, aRebuildDisplayItems);
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}
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void nsInlineFrame::InvalidateFrameWithRect(const nsRect& aRect,
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uint32_t aDisplayItemKey,
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bool aRebuildDisplayItems) {
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if (IsInSVGTextSubtree()) {
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nsIFrame* svgTextFrame = nsLayoutUtils::GetClosestFrameOfType(
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GetParent(), LayoutFrameType::SVGText);
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svgTextFrame->InvalidateFrame();
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return;
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}
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nsContainerFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey,
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aRebuildDisplayItems);
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}
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static inline bool IsMarginZero(const LengthPercentageOrAuto& aLength) {
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return aLength.IsAuto() ||
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nsLayoutUtils::IsMarginZero(aLength.AsLengthPercentage());
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}
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/* virtual */
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bool nsInlineFrame::IsSelfEmpty() {
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#if 0
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// I used to think inline frames worked this way, but it seems they
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// don't. At least not in our codebase.
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if (GetPresContext()->CompatibilityMode() == eCompatibility_FullStandards) {
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return false;
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}
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#endif
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const nsStyleMargin* margin = StyleMargin();
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const nsStyleBorder* border = StyleBorder();
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const nsStylePadding* padding = StylePadding();
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// Block-start and -end ignored, since they shouldn't affect things, but this
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// doesn't really match with nsLineLayout.cpp's setting of
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// ZeroEffectiveSpanBox, anymore, so what should this really be?
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WritingMode wm = GetWritingMode();
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bool haveStart, haveEnd;
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auto HaveSide = [&](mozilla::Side aSide) -> bool {
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return border->GetComputedBorderWidth(aSide) != 0 ||
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!nsLayoutUtils::IsPaddingZero(padding->mPadding.Get(aSide)) ||
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!IsMarginZero(margin->mMargin.Get(aSide));
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};
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// Initially set up haveStart and haveEnd in terms of visual (LTR/TTB)
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// coordinates; we'll exchange them later if bidi-RTL is in effect to
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// get logical start and end flags.
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if (wm.IsVertical()) {
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haveStart = HaveSide(eSideTop);
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haveEnd = HaveSide(eSideBottom);
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} else {
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haveStart = HaveSide(eSideLeft);
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haveEnd = HaveSide(eSideRight);
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}
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if (haveStart || haveEnd) {
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// We skip this block and return false for box-decoration-break:clone since
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// in that case all the continuations will have the border/padding/margin.
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if (HasAnyStateBits(NS_FRAME_PART_OF_IBSPLIT) &&
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StyleBorder()->mBoxDecorationBreak == StyleBoxDecorationBreak::Slice) {
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// When direction=rtl, we need to consider logical rather than visual
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// start and end, so swap the flags.
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if (wm.IsBidiRTL()) {
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std::swap(haveStart, haveEnd);
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}
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// For ib-split frames, ignore things we know we'll skip in GetSkipSides.
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// XXXbz should we be doing this for non-ib-split frames too, in a more
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// general way?
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// Get the first continuation eagerly, as a performance optimization, to
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// avoid having to get it twice..
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nsIFrame* firstCont = FirstContinuation();
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return (!haveStart || firstCont->FrameIsNonFirstInIBSplit()) &&
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(!haveEnd || firstCont->FrameIsNonLastInIBSplit());
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}
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return false;
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}
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return true;
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}
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bool nsInlineFrame::IsEmpty() {
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if (!IsSelfEmpty()) {
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return false;
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}
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for (nsIFrame* kid : mFrames) {
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if (!kid->IsEmpty()) return false;
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}
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return true;
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}
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nsIFrame::FrameSearchResult nsInlineFrame::PeekOffsetCharacter(
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bool aForward, int32_t* aOffset, PeekOffsetCharacterOptions aOptions) {
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// Override the implementation in nsFrame, to skip empty inline frames
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NS_ASSERTION(aOffset && *aOffset <= 1, "aOffset out of range");
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int32_t startOffset = *aOffset;
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if (startOffset < 0) startOffset = 1;
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if (aForward == (startOffset == 0)) {
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// We're before the frame and moving forward, or after it and moving
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// backwards: skip to the other side, but keep going.
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*aOffset = 1 - startOffset;
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}
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return CONTINUE;
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}
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void nsInlineFrame::Destroy(DestroyContext& aContext) {
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nsFrameList* overflowFrames = GetOverflowFrames();
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if (overflowFrames) {
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// Fixup the parent pointers for any child frames on the OverflowList.
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// nsIFrame::DestroyFrom depends on that to find the sticky scroll
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// container (an ancestor).
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overflowFrames->ApplySetParent(this);
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}
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nsContainerFrame::Destroy(aContext);
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}
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void nsInlineFrame::StealFrame(nsIFrame* aChild) {
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if (MaybeStealOverflowContainerFrame(aChild)) {
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return;
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}
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nsInlineFrame* parent = this;
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do {
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if (parent->mFrames.StartRemoveFrame(aChild)) {
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return;
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}
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// We didn't find the child in our principal child list.
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// Maybe it's on the overflow list?
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nsFrameList* frameList = parent->GetOverflowFrames();
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if (frameList && frameList->ContinueRemoveFrame(aChild)) {
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if (frameList->IsEmpty()) {
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parent->DestroyOverflowList();
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}
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return;
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}
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// Due to our "lazy reparenting" optimization 'aChild' might not actually
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// be on any of our child lists, but instead in one of our next-in-flows.
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parent = static_cast<nsInlineFrame*>(parent->GetNextInFlow());
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} while (parent);
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MOZ_ASSERT_UNREACHABLE("nsInlineFrame::StealFrame: can't find aChild");
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}
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void nsInlineFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) {
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BuildDisplayListForInline(aBuilder, aLists);
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// The sole purpose of this is to trigger display of the selection
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// window for Named Anchors, which don't have any children and
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// normally don't have any size, but in Editor we use CSS to display
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// an image to represent this "hidden" element.
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if (!mFrames.FirstChild()) {
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DisplaySelectionOverlay(aBuilder, aLists.Content());
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}
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}
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//////////////////////////////////////////////////////////////////////
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// Reflow methods
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/* virtual */
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void nsInlineFrame::AddInlineMinISize(gfxContext* aRenderingContext,
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nsIFrame::InlineMinISizeData* aData) {
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DoInlineMinISize(aRenderingContext, aData);
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}
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/* virtual */
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void nsInlineFrame::AddInlinePrefISize(gfxContext* aRenderingContext,
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nsIFrame::InlinePrefISizeData* aData) {
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DoInlinePrefISize(aRenderingContext, aData);
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}
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/* virtual */
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nsIFrame::SizeComputationResult nsInlineFrame::ComputeSize(
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gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
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nscoord aAvailableISize, const LogicalSize& aMargin,
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const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
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ComputeSizeFlags aFlags) {
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// Inlines and text don't compute size before reflow.
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return {LogicalSize(aWM, NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE),
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AspectRatioUsage::None};
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}
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nsRect nsInlineFrame::ComputeTightBounds(DrawTarget* aDrawTarget) const {
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// be conservative
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if (Style()->HasTextDecorationLines()) {
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return InkOverflowRect();
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}
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return ComputeSimpleTightBounds(aDrawTarget);
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}
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static void ReparentChildListStyle(nsPresContext* aPresContext,
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const nsFrameList::Slice& aFrames,
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nsIFrame* aParentFrame) {
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RestyleManager* restyleManager = aPresContext->RestyleManager();
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for (nsIFrame* f : aFrames) {
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NS_ASSERTION(f->GetParent() == aParentFrame, "Bogus parentage");
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restyleManager->ReparentComputedStyleForFirstLine(f);
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nsLayoutUtils::MarkDescendantsDirty(f);
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}
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}
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void nsInlineFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) {
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MarkInReflow();
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DO_GLOBAL_REFLOW_COUNT("nsInlineFrame");
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MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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if (!aReflowInput.mLineLayout) {
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NS_ERROR("must have non-null aReflowInput.mLineLayout");
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return;
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}
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if (IsFrameTreeTooDeep(aReflowInput, aMetrics, aStatus)) {
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return;
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}
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bool lazilySetParentPointer = false;
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// Check for an overflow list with our prev-in-flow
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nsInlineFrame* prevInFlow = (nsInlineFrame*)GetPrevInFlow();
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if (prevInFlow) {
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AutoFrameListPtr prevOverflowFrames(aPresContext,
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prevInFlow->StealOverflowFrames());
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if (prevOverflowFrames) {
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// When pushing and pulling frames we need to check for whether any
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// views need to be reparented.
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nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames, prevInFlow,
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this);
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// Check if we should do the lazilySetParentPointer optimization.
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// Only do it in simple cases where we're being reflowed for the
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// first time, nothing (e.g. bidi resolution) has already given
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// us children, and there's no next-in-flow, so all our frames
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// will be taken from prevOverflowFrames.
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if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW) && mFrames.IsEmpty() &&
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!GetNextInFlow()) {
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// If our child list is empty, just put the new frames into it.
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// Note that we don't set the parent pointer for the new frames. Instead
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// wait to do this until we actually reflow the frame. If the overflow
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// list contains thousands of frames this is a big performance issue
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// (see bug #5588)
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mFrames = std::move(*prevOverflowFrames);
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lazilySetParentPointer = true;
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} else {
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// Insert the new frames at the beginning of the child list
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// and set their parent pointer
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const nsFrameList::Slice& newFrames =
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mFrames.InsertFrames(this, nullptr, std::move(*prevOverflowFrames));
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// If our prev in flow was under the first continuation of a first-line
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// frame then we need to reparent the ComputedStyles to remove the
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// the special first-line styling. In the lazilySetParentPointer case
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// we reparent the ComputedStyles when we set their parents in
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// nsInlineFrame::ReflowFrames and nsInlineFrame::ReflowInlineFrame.
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if (aReflowInput.mLineLayout->GetInFirstLine()) {
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ReparentChildListStyle(aPresContext, newFrames, this);
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}
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}
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}
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}
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// It's also possible that we have an overflow list for ourselves
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#ifdef DEBUG
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if (HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
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// If it's our initial reflow, then we should not have an overflow list.
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// However, add an assertion in case we get reflowed more than once with
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// the initial reflow reason
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nsFrameList* overflowFrames = GetOverflowFrames();
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NS_ASSERTION(!overflowFrames || overflowFrames->IsEmpty(),
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"overflow list is not empty for initial reflow");
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}
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#endif
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if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
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DrainSelfOverflowListInternal(aReflowInput.mLineLayout->GetInFirstLine());
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}
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// Set our own reflow input (additional state above and beyond aReflowInput).
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InlineReflowInput irs;
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irs.mPrevFrame = nullptr;
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irs.mLineContainer = aReflowInput.mLineLayout->LineContainerFrame();
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irs.mLineLayout = aReflowInput.mLineLayout;
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irs.mNextInFlow = (nsInlineFrame*)GetNextInFlow();
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irs.mSetParentPointer = lazilySetParentPointer;
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if (mFrames.IsEmpty()) {
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// Try to pull over one frame before starting so that we know
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// whether we have an anonymous block or not.
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Unused << PullOneFrame(aPresContext, irs);
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}
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ReflowFrames(aPresContext, aReflowInput, irs, aMetrics, aStatus);
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ReflowAbsoluteFrames(aPresContext, aMetrics, aReflowInput, aStatus);
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// Note: the line layout code will properly compute our
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// overflow-rect state for us.
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}
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nsresult nsInlineFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute, int32_t aModType) {
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nsresult rv =
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nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (IsInSVGTextSubtree()) {
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SVGTextFrame* f = static_cast<SVGTextFrame*>(
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nsLayoutUtils::GetClosestFrameOfType(this, LayoutFrameType::SVGText));
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f->HandleAttributeChangeInDescendant(mContent->AsElement(), aNameSpaceID,
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aAttribute);
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}
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return NS_OK;
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}
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bool nsInlineFrame::DrainSelfOverflowListInternal(bool aInFirstLine) {
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AutoFrameListPtr overflowFrames(PresContext(), StealOverflowFrames());
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if (!overflowFrames || overflowFrames->IsEmpty()) {
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return false;
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}
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// The frames on our own overflowlist may have been pushed by a
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// previous lazilySetParentPointer Reflow so we need to ensure the
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// correct parent pointer. This is sometimes skipped by Reflow.
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nsIFrame* firstChild = overflowFrames->FirstChild();
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RestyleManager* restyleManager = PresContext()->RestyleManager();
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for (nsIFrame* f = firstChild; f; f = f->GetNextSibling()) {
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f->SetParent(this);
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if (MOZ_UNLIKELY(aInFirstLine)) {
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restyleManager->ReparentComputedStyleForFirstLine(f);
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nsLayoutUtils::MarkDescendantsDirty(f);
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}
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}
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mFrames.AppendFrames(nullptr, std::move(*overflowFrames));
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return true;
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}
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/* virtual */
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bool nsInlineFrame::DrainSelfOverflowList() {
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nsIFrame* lineContainer = nsLayoutUtils::FindNearestBlockAncestor(this);
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// Add the eInFirstLine flag if we have a ::first-line ancestor frame.
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// No need to look further than the nearest line container though.
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bool inFirstLine = false;
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for (nsIFrame* p = GetParent(); p != lineContainer; p = p->GetParent()) {
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if (p->IsLineFrame()) {
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inFirstLine = true;
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break;
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}
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}
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return DrainSelfOverflowListInternal(inFirstLine);
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}
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/* virtual */
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bool nsInlineFrame::CanContinueTextRun() const {
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// We can continue a text run through an inline frame
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return true;
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}
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/* virtual */
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void nsInlineFrame::PullOverflowsFromPrevInFlow() {
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nsInlineFrame* prevInFlow = static_cast<nsInlineFrame*>(GetPrevInFlow());
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if (prevInFlow) {
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nsPresContext* presContext = PresContext();
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AutoFrameListPtr prevOverflowFrames(presContext,
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prevInFlow->StealOverflowFrames());
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if (prevOverflowFrames) {
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// Assume that our prev-in-flow has the same line container that we do.
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nsContainerFrame::ReparentFrameViewList(*prevOverflowFrames, prevInFlow,
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this);
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mFrames.InsertFrames(this, nullptr, std::move(*prevOverflowFrames));
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}
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}
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}
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void nsInlineFrame::ReflowFrames(nsPresContext* aPresContext,
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const ReflowInput& aReflowInput,
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InlineReflowInput& irs, ReflowOutput& aMetrics,
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nsReflowStatus& aStatus) {
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MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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nsLineLayout* lineLayout = aReflowInput.mLineLayout;
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bool inFirstLine = aReflowInput.mLineLayout->GetInFirstLine();
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RestyleManager* restyleManager = aPresContext->RestyleManager();
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WritingMode frameWM = aReflowInput.GetWritingMode();
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WritingMode lineWM = aReflowInput.mLineLayout->mRootSpan->mWritingMode;
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LogicalMargin framePadding =
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aReflowInput.ComputedLogicalBorderPadding(frameWM);
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nscoord startEdge = 0;
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const bool boxDecorationBreakClone = MOZ_UNLIKELY(
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StyleBorder()->mBoxDecorationBreak == StyleBoxDecorationBreak::Clone);
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// Don't offset by our start borderpadding if we have a prev continuation or
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// if we're in a part of an {ib} split other than the first one. For
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// box-decoration-break:clone we always offset our start since all
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// continuations have border/padding.
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if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
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boxDecorationBreakClone) {
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startEdge = framePadding.IStart(frameWM);
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}
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nscoord availableISize = aReflowInput.AvailableISize();
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NS_ASSERTION(availableISize != NS_UNCONSTRAINEDSIZE,
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|
"should no longer use available widths");
|
|
// Subtract off inline axis border+padding from availableISize
|
|
availableISize -= startEdge;
|
|
availableISize -= framePadding.IEnd(frameWM);
|
|
lineLayout->BeginSpan(this, &aReflowInput, startEdge,
|
|
startEdge + availableISize, &mBaseline);
|
|
|
|
// First reflow our principal children.
|
|
nsIFrame* frame = mFrames.FirstChild();
|
|
bool done = false;
|
|
while (frame) {
|
|
// Check if we should lazily set the child frame's parent pointer.
|
|
if (irs.mSetParentPointer) {
|
|
nsIFrame* child = frame;
|
|
do {
|
|
child->SetParent(this);
|
|
if (inFirstLine) {
|
|
restyleManager->ReparentComputedStyleForFirstLine(child);
|
|
nsLayoutUtils::MarkDescendantsDirty(child);
|
|
}
|
|
// We also need to do the same for |frame|'s next-in-flows that are in
|
|
// the sibling list. Otherwise, if we reflow |frame| and it's complete
|
|
// we'll crash when trying to delete its next-in-flow.
|
|
// This scenario doesn't happen often, but it can happen.
|
|
nsIFrame* nextSibling = child->GetNextSibling();
|
|
child = child->GetNextInFlow();
|
|
if (MOZ_UNLIKELY(child)) {
|
|
while (child != nextSibling && nextSibling) {
|
|
nextSibling = nextSibling->GetNextSibling();
|
|
}
|
|
if (!nextSibling) {
|
|
child = nullptr;
|
|
}
|
|
}
|
|
MOZ_ASSERT(!child || mFrames.ContainsFrame(child));
|
|
} while (child);
|
|
|
|
// Fix the parent pointer for ::first-letter child frame next-in-flows,
|
|
// so nsFirstLetterFrame::Reflow can destroy them safely (bug 401042).
|
|
nsIFrame* realFrame = nsPlaceholderFrame::GetRealFrameFor(frame);
|
|
if (realFrame->IsLetterFrame()) {
|
|
nsIFrame* child = realFrame->PrincipalChildList().FirstChild();
|
|
if (child) {
|
|
NS_ASSERTION(child->IsTextFrame(), "unexpected frame type");
|
|
nsIFrame* nextInFlow = child->GetNextInFlow();
|
|
for (; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
|
|
NS_ASSERTION(nextInFlow->IsTextFrame(), "unexpected frame type");
|
|
if (mFrames.ContainsFrame(nextInFlow)) {
|
|
nextInFlow->SetParent(this);
|
|
if (inFirstLine) {
|
|
restyleManager->ReparentComputedStyleForFirstLine(nextInFlow);
|
|
nsLayoutUtils::MarkDescendantsDirty(nextInFlow);
|
|
}
|
|
} else {
|
|
#ifdef DEBUG
|
|
// Once we find a next-in-flow that isn't ours none of the
|
|
// remaining next-in-flows should be either.
|
|
for (; nextInFlow; nextInFlow = nextInFlow->GetNextInFlow()) {
|
|
NS_ASSERTION(!mFrames.ContainsFrame(nextInFlow),
|
|
"unexpected letter frame flow");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
MOZ_ASSERT(frame->GetParent() == this);
|
|
|
|
if (!done) {
|
|
bool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
|
|
ReflowInlineFrame(aPresContext, aReflowInput, irs, frame, aStatus);
|
|
done = aStatus.IsInlineBreak() ||
|
|
(!reflowingFirstLetter && aStatus.IsIncomplete());
|
|
if (done) {
|
|
if (!irs.mSetParentPointer) {
|
|
break;
|
|
}
|
|
// Keep reparenting the remaining siblings, but don't reflow them.
|
|
nsFrameList* pushedFrames = GetOverflowFrames();
|
|
if (pushedFrames && pushedFrames->FirstChild() == frame) {
|
|
// Don't bother if |frame| was pushed to our overflow list.
|
|
break;
|
|
}
|
|
} else {
|
|
irs.mPrevFrame = frame;
|
|
}
|
|
}
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
|
|
// Attempt to pull frames from our next-in-flow until we can't
|
|
if (!done && GetNextInFlow()) {
|
|
while (true) {
|
|
bool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
|
|
if (!frame) { // Could be non-null if we pulled a first-letter frame and
|
|
// it created a continuation, since we don't push those.
|
|
frame = PullOneFrame(aPresContext, irs);
|
|
}
|
|
#ifdef NOISY_PUSHING
|
|
printf("%p pulled up %p\n", this, frame);
|
|
#endif
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
ReflowInlineFrame(aPresContext, aReflowInput, irs, frame, aStatus);
|
|
if (aStatus.IsInlineBreak() ||
|
|
(!reflowingFirstLetter && aStatus.IsIncomplete())) {
|
|
break;
|
|
}
|
|
irs.mPrevFrame = frame;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(!aStatus.IsComplete() || !GetOverflowFrames(),
|
|
"We can't be complete AND have overflow frames!");
|
|
|
|
// If after reflowing our children they take up no area then make
|
|
// sure that we don't either.
|
|
//
|
|
// Note: CSS demands that empty inline elements still affect the
|
|
// line-height calculations. However, continuations of an inline
|
|
// that are empty we force to empty so that things like collapsed
|
|
// whitespace in an inline element don't affect the line-height.
|
|
aMetrics.ISize(lineWM) = lineLayout->EndSpan(this);
|
|
|
|
// Compute final width.
|
|
|
|
// XXX Note that that the padding start and end are in the frame's
|
|
// writing mode, but the metrics' inline-size is in the line's
|
|
// writing mode. This makes sense if the line and frame are both
|
|
// vertical or both horizontal, but what should happen with
|
|
// orthogonal inlines?
|
|
|
|
// Make sure to not include our start border and padding if we have a prev
|
|
// continuation or if we're in a part of an {ib} split other than the first
|
|
// one. For box-decoration-break:clone we always include our start border
|
|
// and padding since all continuations have them.
|
|
if ((!GetPrevContinuation() && !FrameIsNonFirstInIBSplit()) ||
|
|
boxDecorationBreakClone) {
|
|
aMetrics.ISize(lineWM) += framePadding.IStart(frameWM);
|
|
}
|
|
|
|
/*
|
|
* We want to only apply the end border and padding if we're the last
|
|
* continuation and either not in an {ib} split or the last part of it. To
|
|
* be the last continuation we have to be complete (so that we won't get a
|
|
* next-in-flow) and have no non-fluid continuations on our continuation
|
|
* chain. For box-decoration-break:clone we always apply the end border and
|
|
* padding since all continuations have them.
|
|
*/
|
|
if ((aStatus.IsComplete() && !LastInFlow()->GetNextContinuation() &&
|
|
!FrameIsNonLastInIBSplit()) ||
|
|
boxDecorationBreakClone) {
|
|
aMetrics.ISize(lineWM) += framePadding.IEnd(frameWM);
|
|
}
|
|
|
|
nsLayoutUtils::SetBSizeFromFontMetrics(this, aMetrics, framePadding, lineWM,
|
|
frameWM);
|
|
|
|
// For now our overflow area is zero. The real value will be
|
|
// computed in |nsLineLayout::RelativePositionFrames|.
|
|
aMetrics.mOverflowAreas.Clear();
|
|
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": metrics=%d,%d ascent=%d\n", aMetrics.Width(), aMetrics.Height(),
|
|
aMetrics.BlockStartAscent());
|
|
#endif
|
|
}
|
|
|
|
// Returns whether there's any remaining frame to pull.
|
|
/* static */
|
|
bool nsInlineFrame::HasFramesToPull(nsInlineFrame* aNextInFlow) {
|
|
while (aNextInFlow) {
|
|
if (!aNextInFlow->mFrames.IsEmpty()) {
|
|
return true;
|
|
}
|
|
if (const nsFrameList* overflow = aNextInFlow->GetOverflowFrames()) {
|
|
if (!overflow->IsEmpty()) {
|
|
return true;
|
|
}
|
|
}
|
|
aNextInFlow = static_cast<nsInlineFrame*>(aNextInFlow->GetNextInFlow());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void nsInlineFrame::ReflowInlineFrame(nsPresContext* aPresContext,
|
|
const ReflowInput& aReflowInput,
|
|
InlineReflowInput& irs, nsIFrame* aFrame,
|
|
nsReflowStatus& aStatus) {
|
|
nsLineLayout* lineLayout = aReflowInput.mLineLayout;
|
|
bool reflowingFirstLetter = lineLayout->GetFirstLetterStyleOK();
|
|
bool pushedFrame;
|
|
aStatus.Reset();
|
|
lineLayout->ReflowFrame(aFrame, aStatus, nullptr, pushedFrame);
|
|
|
|
if (aStatus.IsInlineBreakBefore()) {
|
|
if (aFrame != mFrames.FirstChild()) {
|
|
// Change break-before status into break-after since we have
|
|
// already placed at least one child frame. This preserves the
|
|
// break-type so that it can be propagated upward.
|
|
StyleClear oldClearType = aStatus.FloatClearType();
|
|
aStatus.Reset();
|
|
aStatus.SetIncomplete();
|
|
aStatus.SetInlineLineBreakAfter(oldClearType);
|
|
PushFrames(aPresContext, aFrame, irs.mPrevFrame, irs);
|
|
} else {
|
|
// Preserve reflow status when breaking-before our first child
|
|
// and propagate it upward without modification.
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Create a next-in-flow if needed.
|
|
if (!aStatus.IsFullyComplete()) {
|
|
CreateNextInFlow(aFrame);
|
|
}
|
|
|
|
if (aStatus.IsInlineBreakAfter()) {
|
|
nsIFrame* nextFrame = aFrame->GetNextSibling();
|
|
if (nextFrame) {
|
|
aStatus.SetIncomplete();
|
|
PushFrames(aPresContext, nextFrame, aFrame, irs);
|
|
} else {
|
|
// We must return an incomplete status if there are more child
|
|
// frames remaining in a next-in-flow that follows this frame.
|
|
if (HasFramesToPull(static_cast<nsInlineFrame*>(GetNextInFlow()))) {
|
|
aStatus.SetIncomplete();
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!aStatus.IsFullyComplete() && !reflowingFirstLetter) {
|
|
nsIFrame* nextFrame = aFrame->GetNextSibling();
|
|
if (nextFrame) {
|
|
PushFrames(aPresContext, nextFrame, aFrame, irs);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsIFrame* nsInlineFrame::PullOneFrame(nsPresContext* aPresContext,
|
|
InlineReflowInput& irs) {
|
|
nsIFrame* frame = nullptr;
|
|
nsInlineFrame* nextInFlow = irs.mNextInFlow;
|
|
|
|
#ifdef DEBUG
|
|
bool willPull = HasFramesToPull(nextInFlow);
|
|
#endif
|
|
|
|
while (nextInFlow) {
|
|
frame = nextInFlow->mFrames.FirstChild();
|
|
if (!frame) {
|
|
// The nextInFlow's principal list has no frames, try its overflow list.
|
|
nsFrameList* overflowFrames = nextInFlow->GetOverflowFrames();
|
|
if (overflowFrames) {
|
|
frame = overflowFrames->RemoveFirstChild();
|
|
if (overflowFrames->IsEmpty()) {
|
|
// We're stealing the only frame - delete the overflow list.
|
|
nextInFlow->DestroyOverflowList();
|
|
} else {
|
|
// We leave the remaining frames on the overflow list (rather than
|
|
// putting them on nextInFlow's principal list) so we don't have to
|
|
// set up the parent for them.
|
|
}
|
|
// ReparentFloatsForInlineChild needs it to be on a child list -
|
|
// we remove it again below.
|
|
nextInFlow->mFrames = nsFrameList(frame, frame);
|
|
}
|
|
}
|
|
|
|
if (frame) {
|
|
// If our block has no next continuation, then any floats belonging to
|
|
// the pulled frame must belong to our block already. This check ensures
|
|
// we do no extra work in the common non-vertical-breaking case.
|
|
if (irs.mLineContainer && irs.mLineContainer->GetNextContinuation()) {
|
|
// The blockChildren.ContainsFrame check performed by
|
|
// ReparentFloatsForInlineChild will be fast because frame's ancestor
|
|
// will be the first child of its containing block.
|
|
ReparentFloatsForInlineChild(irs.mLineContainer, frame, false);
|
|
}
|
|
nextInFlow->mFrames.RemoveFirstChild();
|
|
// nsFirstLineFrame::PullOneFrame calls ReparentComputedStyle.
|
|
|
|
mFrames.InsertFrame(this, irs.mPrevFrame, frame);
|
|
if (irs.mLineLayout) {
|
|
irs.mLineLayout->SetDirtyNextLine();
|
|
}
|
|
nsContainerFrame::ReparentFrameView(frame, nextInFlow, this);
|
|
break;
|
|
}
|
|
nextInFlow = static_cast<nsInlineFrame*>(nextInFlow->GetNextInFlow());
|
|
irs.mNextInFlow = nextInFlow;
|
|
}
|
|
|
|
MOZ_ASSERT(!!frame == willPull);
|
|
return frame;
|
|
}
|
|
|
|
void nsInlineFrame::PushFrames(nsPresContext* aPresContext,
|
|
nsIFrame* aFromChild, nsIFrame* aPrevSibling,
|
|
InlineReflowInput& aState) {
|
|
#ifdef NOISY_PUSHING
|
|
printf("%p pushing aFromChild %p, disconnecting from prev sib %p\n", this,
|
|
aFromChild, aPrevSibling);
|
|
#endif
|
|
|
|
PushChildrenToOverflow(aFromChild, aPrevSibling);
|
|
if (aState.mLineLayout) {
|
|
aState.mLineLayout->SetDirtyNextLine();
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
LogicalSides nsInlineFrame::GetLogicalSkipSides() const {
|
|
LogicalSides skip(mWritingMode);
|
|
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
|
|
StyleBoxDecorationBreak::Clone)) {
|
|
return skip;
|
|
}
|
|
|
|
if (!IsFirst()) {
|
|
nsInlineFrame* prev = (nsInlineFrame*)GetPrevContinuation();
|
|
if (HasAnyStateBits(NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET) ||
|
|
(prev && (prev->mRect.height || prev->mRect.width))) {
|
|
// Prev continuation is not empty therefore we don't render our start
|
|
// border edge.
|
|
skip += LogicalSide::IStart;
|
|
} else {
|
|
// If the prev continuation is empty, then go ahead and let our start
|
|
// edge border render.
|
|
}
|
|
}
|
|
if (!IsLast()) {
|
|
nsInlineFrame* next = (nsInlineFrame*)GetNextContinuation();
|
|
if (HasAnyStateBits(NS_INLINE_FRAME_BIDI_VISUAL_STATE_IS_SET) ||
|
|
(next && (next->mRect.height || next->mRect.width))) {
|
|
// Next continuation is not empty therefore we don't render our end
|
|
// border edge.
|
|
skip += LogicalSide::IEnd;
|
|
} else {
|
|
// If the next continuation is empty, then go ahead and let our end
|
|
// edge border render.
|
|
}
|
|
}
|
|
|
|
if (HasAnyStateBits(NS_FRAME_PART_OF_IBSPLIT)) {
|
|
// All but the last part of an {ib} split should skip the "end" side (as
|
|
// determined by this frame's direction) and all but the first part of such
|
|
// a split should skip the "start" side. But figuring out which part of
|
|
// the split we are involves getting our first continuation, which might be
|
|
// expensive. So don't bother if we already have the relevant bits set.
|
|
if (skip != LogicalSides(mWritingMode, LogicalSides::IBoth)) {
|
|
// We're missing one of the skip bits, so check whether we need to set it.
|
|
// Only get the first continuation once, as an optimization.
|
|
nsIFrame* firstContinuation = FirstContinuation();
|
|
if (firstContinuation->FrameIsNonLastInIBSplit()) {
|
|
skip += LogicalSide::IEnd;
|
|
}
|
|
if (firstContinuation->FrameIsNonFirstInIBSplit()) {
|
|
skip += LogicalSide::IStart;
|
|
}
|
|
}
|
|
}
|
|
|
|
return skip;
|
|
}
|
|
|
|
Maybe<nscoord> nsInlineFrame::GetNaturalBaselineBOffset(
|
|
WritingMode aWM, BaselineSharingGroup aBaselineGroup,
|
|
BaselineExportContext) const {
|
|
if (aBaselineGroup == BaselineSharingGroup::Last) {
|
|
return Nothing{};
|
|
}
|
|
return Some(mBaseline);
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
a11y::AccType nsInlineFrame::AccessibleType() {
|
|
// FIXME(emilio): This is broken, if the image has its default `display` value
|
|
// overridden. Should be somewhere else.
|
|
if (mContent->IsHTMLElement(
|
|
nsGkAtoms::img)) // Create accessible for broken <img>
|
|
return a11y::eHyperTextType;
|
|
|
|
return a11y::eNoType;
|
|
}
|
|
#endif
|
|
|
|
void nsInlineFrame::UpdateStyleOfOwnedAnonBoxesForIBSplit(
|
|
ServoRestyleState& aRestyleState) {
|
|
MOZ_ASSERT(HasAnyStateBits(NS_FRAME_OWNS_ANON_BOXES),
|
|
"Why did we get called?");
|
|
MOZ_ASSERT(HasAnyStateBits(NS_FRAME_PART_OF_IBSPLIT),
|
|
"Why did we have the NS_FRAME_OWNS_ANON_BOXES bit set?");
|
|
// Note: this assert _looks_ expensive, but it's cheap in all the cases when
|
|
// it passes!
|
|
MOZ_ASSERT(nsLayoutUtils::FirstContinuationOrIBSplitSibling(this) == this,
|
|
"Only the primary frame of the inline in a block-inside-inline "
|
|
"split should have NS_FRAME_OWNS_ANON_BOXES");
|
|
MOZ_ASSERT(mContent->GetPrimaryFrame() == this,
|
|
"We should be the primary frame for our element");
|
|
|
|
nsIFrame* blockFrame = GetProperty(nsIFrame::IBSplitSibling());
|
|
MOZ_ASSERT(blockFrame, "Why did we have an IB split?");
|
|
|
|
// The later inlines need to get our style.
|
|
ComputedStyle* ourStyle = Style();
|
|
|
|
// The anonymous block's style inherits from ours, and we already have our new
|
|
// ComputedStyle.
|
|
RefPtr<ComputedStyle> newContext =
|
|
aRestyleState.StyleSet().ResolveInheritingAnonymousBoxStyle(
|
|
PseudoStyleType::mozBlockInsideInlineWrapper, ourStyle);
|
|
|
|
// We're guaranteed that newContext only differs from the old ComputedStyle on
|
|
// the block in things they might inherit from us. And changehint processing
|
|
// guarantees walking the continuation and ib-sibling chains, so our existing
|
|
// changehint being in aChangeList is good enough. So we don't need to touch
|
|
// aChangeList at all here.
|
|
|
|
while (blockFrame) {
|
|
MOZ_ASSERT(!blockFrame->GetPrevContinuation(),
|
|
"Must be first continuation");
|
|
|
|
MOZ_ASSERT(blockFrame->Style()->GetPseudoType() ==
|
|
PseudoStyleType::mozBlockInsideInlineWrapper,
|
|
"Unexpected kind of ComputedStyle");
|
|
|
|
for (nsIFrame* cont = blockFrame; cont;
|
|
cont = cont->GetNextContinuation()) {
|
|
cont->SetComputedStyle(newContext);
|
|
}
|
|
|
|
nsIFrame* nextInline = blockFrame->GetProperty(nsIFrame::IBSplitSibling());
|
|
|
|
// This check is here due to bug 1431232. Please remove it once
|
|
// that bug is fixed.
|
|
if (MOZ_UNLIKELY(!nextInline)) {
|
|
break;
|
|
}
|
|
|
|
MOZ_ASSERT(nextInline, "There is always a trailing inline in an IB split");
|
|
|
|
for (nsIFrame* cont = nextInline; cont;
|
|
cont = cont->GetNextContinuation()) {
|
|
cont->SetComputedStyle(ourStyle);
|
|
}
|
|
blockFrame = nextInline->GetProperty(nsIFrame::IBSplitSibling());
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
// nsLineFrame implementation
|
|
|
|
nsFirstLineFrame* NS_NewFirstLineFrame(PresShell* aPresShell,
|
|
ComputedStyle* aStyle) {
|
|
return new (aPresShell)
|
|
nsFirstLineFrame(aStyle, aPresShell->GetPresContext());
|
|
}
|
|
|
|
NS_IMPL_FRAMEARENA_HELPERS(nsFirstLineFrame)
|
|
|
|
void nsFirstLineFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) {
|
|
nsInlineFrame::Init(aContent, aParent, aPrevInFlow);
|
|
if (!aPrevInFlow) {
|
|
MOZ_ASSERT(Style()->GetPseudoType() == PseudoStyleType::firstLine);
|
|
return;
|
|
}
|
|
|
|
// This frame is a continuation - fixup the computed style if aPrevInFlow
|
|
// is the first-in-flow (the only one with a ::first-line pseudo).
|
|
if (aPrevInFlow->Style()->GetPseudoType() == PseudoStyleType::firstLine) {
|
|
MOZ_ASSERT(FirstInFlow() == aPrevInFlow);
|
|
// Create a new ComputedStyle that is a child of the parent
|
|
// ComputedStyle thus removing the ::first-line style. This way
|
|
// we behave as if an anonymous (unstyled) span was the child
|
|
// of the parent frame.
|
|
ComputedStyle* parentContext = aParent->Style();
|
|
RefPtr<ComputedStyle> newSC =
|
|
PresContext()->StyleSet()->ResolveInheritingAnonymousBoxStyle(
|
|
PseudoStyleType::mozLineFrame, parentContext);
|
|
SetComputedStyle(newSC);
|
|
} else {
|
|
MOZ_ASSERT(FirstInFlow() != aPrevInFlow);
|
|
MOZ_ASSERT(aPrevInFlow->Style()->GetPseudoType() ==
|
|
PseudoStyleType::mozLineFrame);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
nsresult nsFirstLineFrame::GetFrameName(nsAString& aResult) const {
|
|
return MakeFrameName(u"Line"_ns, aResult);
|
|
}
|
|
#endif
|
|
|
|
nsIFrame* nsFirstLineFrame::PullOneFrame(nsPresContext* aPresContext,
|
|
InlineReflowInput& irs) {
|
|
nsIFrame* frame = nsInlineFrame::PullOneFrame(aPresContext, irs);
|
|
if (frame && !GetPrevInFlow()) {
|
|
// We are a first-line frame. Fixup the child frames
|
|
// style-context that we just pulled.
|
|
NS_ASSERTION(frame->GetParent() == this, "Incorrect parent?");
|
|
aPresContext->RestyleManager()->ReparentComputedStyleForFirstLine(frame);
|
|
nsLayoutUtils::MarkDescendantsDirty(frame);
|
|
}
|
|
return frame;
|
|
}
|
|
|
|
void nsFirstLineFrame::Reflow(nsPresContext* aPresContext,
|
|
ReflowOutput& aMetrics,
|
|
const ReflowInput& aReflowInput,
|
|
nsReflowStatus& aStatus) {
|
|
MarkInReflow();
|
|
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
|
|
|
|
if (nullptr == aReflowInput.mLineLayout) {
|
|
return; // XXX does this happen? why?
|
|
}
|
|
|
|
// Check for an overflow list with our prev-in-flow
|
|
nsFirstLineFrame* prevInFlow = (nsFirstLineFrame*)GetPrevInFlow();
|
|
if (prevInFlow) {
|
|
AutoFrameListPtr prevOverflowFrames(aPresContext,
|
|
prevInFlow->StealOverflowFrames());
|
|
if (prevOverflowFrames) {
|
|
// Reparent the new frames and their ComputedStyles.
|
|
const nsFrameList::Slice& newFrames =
|
|
mFrames.InsertFrames(this, nullptr, std::move(*prevOverflowFrames));
|
|
ReparentChildListStyle(aPresContext, newFrames, this);
|
|
}
|
|
}
|
|
|
|
// It's also possible that we have an overflow list for ourselves.
|
|
DrainSelfOverflowList();
|
|
|
|
// Set our own reflow input (additional state above and beyond aReflowInput).
|
|
InlineReflowInput irs;
|
|
irs.mPrevFrame = nullptr;
|
|
irs.mLineContainer = aReflowInput.mLineLayout->LineContainerFrame();
|
|
irs.mLineLayout = aReflowInput.mLineLayout;
|
|
irs.mNextInFlow = (nsInlineFrame*)GetNextInFlow();
|
|
|
|
bool wasEmpty = mFrames.IsEmpty();
|
|
if (wasEmpty) {
|
|
// Try to pull over one frame before starting so that we know
|
|
// whether we have an anonymous block or not.
|
|
PullOneFrame(aPresContext, irs);
|
|
}
|
|
|
|
if (nullptr == GetPrevInFlow()) {
|
|
// XXX This is pretty sick, but what we do here is to pull-up, in
|
|
// advance, all of the next-in-flows children. We re-resolve their
|
|
// style while we are at at it so that when we reflow they have
|
|
// the right style.
|
|
//
|
|
// All of this is so that text-runs reflow properly.
|
|
irs.mPrevFrame = mFrames.LastChild();
|
|
for (;;) {
|
|
nsIFrame* frame = PullOneFrame(aPresContext, irs);
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
irs.mPrevFrame = frame;
|
|
}
|
|
irs.mPrevFrame = nullptr;
|
|
}
|
|
|
|
NS_ASSERTION(!aReflowInput.mLineLayout->GetInFirstLine(),
|
|
"Nested first-line frames? BOGUS");
|
|
aReflowInput.mLineLayout->SetInFirstLine(true);
|
|
ReflowFrames(aPresContext, aReflowInput, irs, aMetrics, aStatus);
|
|
aReflowInput.mLineLayout->SetInFirstLine(false);
|
|
|
|
ReflowAbsoluteFrames(aPresContext, aMetrics, aReflowInput, aStatus);
|
|
|
|
// Note: the line layout code will properly compute our overflow state for us
|
|
}
|
|
|
|
/* virtual */
|
|
void nsFirstLineFrame::PullOverflowsFromPrevInFlow() {
|
|
nsFirstLineFrame* prevInFlow =
|
|
static_cast<nsFirstLineFrame*>(GetPrevInFlow());
|
|
if (prevInFlow) {
|
|
nsPresContext* presContext = PresContext();
|
|
AutoFrameListPtr prevOverflowFrames(presContext,
|
|
prevInFlow->StealOverflowFrames());
|
|
if (prevOverflowFrames) {
|
|
// Assume that our prev-in-flow has the same line container that we do.
|
|
const nsFrameList::Slice& newFrames =
|
|
mFrames.InsertFrames(this, nullptr, std::move(*prevOverflowFrames));
|
|
ReparentChildListStyle(presContext, newFrames, this);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* virtual */
|
|
bool nsFirstLineFrame::DrainSelfOverflowList() {
|
|
AutoFrameListPtr overflowFrames(PresContext(), StealOverflowFrames());
|
|
if (overflowFrames) {
|
|
bool result = !overflowFrames->IsEmpty();
|
|
const nsFrameList::Slice& newFrames =
|
|
mFrames.AppendFrames(nullptr, std::move(*overflowFrames));
|
|
ReparentChildListStyle(PresContext(), newFrames, this);
|
|
return result;
|
|
}
|
|
return false;
|
|
}
|