2329 lines
114 KiB
C++
2329 lines
114 KiB
C++
/*
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* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2003-2019 Apple Inc. All right reserved.
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* Copyright (C) 2010 Google Inc. All rights reserved.
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* Copyright (C) 2013 ChangSeok Oh <shivamidow@gmail.com>
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* Copyright (C) 2013 Adobe Systems Inc. All right reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "config.h"
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#include "LegacyLineLayout.h"
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#include "AXObjectCache.h"
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#include "BidiResolver.h"
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#include "BreakingContext.h"
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#include "FloatingObjects.h"
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#include "HTMLParserIdioms.h"
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#include "InlineIterator.h"
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#include "InlineTextBoxStyle.h"
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#include "LayoutIntegrationRunIterator.h"
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#include "LegacyInlineElementBox.h"
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#include "LegacyInlineTextBox.h"
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#include "LineLayoutState.h"
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#include "Logging.h"
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#include "RenderBlockFlow.h"
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#include "RenderFragmentContainer.h"
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#include "RenderFragmentedFlow.h"
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#include "RenderLayoutState.h"
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#include "RenderLineBreak.h"
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#include "RenderRubyBase.h"
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#include "RenderRubyText.h"
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#include "RenderSVGText.h"
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#include "RenderView.h"
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#include "SVGRootInlineBox.h"
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#include "Settings.h"
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#include "VerticalPositionCache.h"
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#include <wtf/StdLibExtras.h>
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namespace WebCore {
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LegacyLineLayout::LegacyLineLayout(RenderBlockFlow& flow)
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: m_flow(flow)
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{
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}
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LegacyLineLayout::~LegacyLineLayout()
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{
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if (m_flow.containsFloats())
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m_flow.floatingObjects()->clearLineBoxTreePointers();
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lineBoxes().deleteLineBoxTree();
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};
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static void determineDirectionality(TextDirection& dir, InlineIterator iter)
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{
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while (!iter.atEnd()) {
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if (iter.atParagraphSeparator())
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return;
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if (UChar current = iter.current()) {
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UCharDirection charDirection = u_charDirection(current);
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if (charDirection == U_LEFT_TO_RIGHT) {
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dir = TextDirection::LTR;
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return;
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}
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if (charDirection == U_RIGHT_TO_LEFT || charDirection == U_RIGHT_TO_LEFT_ARABIC) {
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dir = TextDirection::RTL;
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return;
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}
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}
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iter.increment();
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}
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}
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inline std::unique_ptr<BidiRun> createRun(int start, int end, RenderObject& obj, InlineBidiResolver& resolver)
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{
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return makeUnique<BidiRun>(start, end, obj, resolver.context(), resolver.dir());
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}
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void LegacyLineLayout::appendRunsForObject(BidiRunList<BidiRun>* runs, int start, int end, RenderObject& obj, InlineBidiResolver& resolver)
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{
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if (start > end || RenderBlock::shouldSkipCreatingRunsForObject(obj))
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return;
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LineWhitespaceCollapsingState& lineWhitespaceCollapsingState = resolver.whitespaceCollapsingState();
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bool haveNextTransition = (lineWhitespaceCollapsingState.currentTransition() < lineWhitespaceCollapsingState.numTransitions());
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InlineIterator nextTransition;
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if (haveNextTransition)
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nextTransition = lineWhitespaceCollapsingState.transitions()[lineWhitespaceCollapsingState.currentTransition()];
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if (lineWhitespaceCollapsingState.betweenTransitions()) {
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if (!haveNextTransition || (&obj != nextTransition.renderer()))
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return;
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// This is a new start point. Stop ignoring objects and
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// adjust our start.
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start = nextTransition.offset();
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lineWhitespaceCollapsingState.incrementCurrentTransition();
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if (start < end) {
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appendRunsForObject(runs, start, end, obj, resolver);
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return;
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}
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} else {
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if (!haveNextTransition || (&obj != nextTransition.renderer())) {
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if (runs)
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runs->appendRun(createRun(start, end, obj, resolver));
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return;
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}
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// An end transition has been encountered within our object. We need to append a run with our endpoint.
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if (static_cast<int>(nextTransition.offset() + 1) <= end) {
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lineWhitespaceCollapsingState.incrementCurrentTransition();
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// The end of the line is before the object we're inspecting. Skip everything and return
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if (nextTransition.refersToEndOfPreviousNode())
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return;
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if (static_cast<int>(nextTransition.offset() + 1) > start && runs)
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runs->appendRun(createRun(start, nextTransition.offset() + 1, obj, resolver));
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appendRunsForObject(runs, nextTransition.offset() + 1, end, obj, resolver);
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} else if (runs)
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runs->appendRun(createRun(start, end, obj, resolver));
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}
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}
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std::unique_ptr<LegacyRootInlineBox> LegacyLineLayout::createRootInlineBox()
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{
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if (is<RenderSVGText>(m_flow)) {
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auto box = makeUnique<SVGRootInlineBox>(downcast<RenderSVGText>(m_flow));
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box->setHasVirtualLogicalHeight();
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return box;
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}
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return makeUnique<LegacyRootInlineBox>(m_flow);
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}
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LegacyRootInlineBox* LegacyLineLayout::createAndAppendRootInlineBox()
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{
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auto newRootBox = createRootInlineBox();
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LegacyRootInlineBox* rootBox = newRootBox.get();
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m_lineBoxes.appendLineBox(WTFMove(newRootBox));
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if (UNLIKELY(AXObjectCache::accessibilityEnabled()) && firstRootBox() == rootBox) {
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if (AXObjectCache* cache = m_flow.document().existingAXObjectCache())
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cache->deferRecomputeIsIgnored(m_flow.element());
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}
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return rootBox;
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}
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LegacyInlineBox* LegacyLineLayout::createInlineBoxForRenderer(RenderObject* renderer, bool isOnlyRun)
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{
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if (renderer == &m_flow)
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return createAndAppendRootInlineBox();
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if (is<RenderText>(*renderer))
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return downcast<RenderText>(*renderer).createInlineTextBox();
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if (is<RenderBox>(*renderer)) {
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// FIXME: This is terrible. This branch returns an *owned* pointer!
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return downcast<RenderBox>(*renderer).createInlineBox().release();
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}
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if (is<RenderLineBreak>(*renderer)) {
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// FIXME: This is terrible. This branch returns an *owned* pointer!
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auto inlineBox = downcast<RenderLineBreak>(*renderer).createInlineBox().release();
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// We only treat a box as text for a <br> if we are on a line by ourself or in strict mode
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// (Note the use of strict mode. In "almost strict" mode, we don't treat the box for <br> as text.)
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inlineBox->setBehavesLikeText(isOnlyRun || renderer->document().inNoQuirksMode() || renderer->isLineBreakOpportunity());
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return inlineBox;
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}
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return downcast<RenderInline>(*renderer).createAndAppendInlineFlowBox();
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}
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static inline void dirtyLineBoxesForRenderer(RenderObject& renderer, bool fullLayout)
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{
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if (is<RenderText>(renderer)) {
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RenderText& renderText = downcast<RenderText>(renderer);
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updateCounterIfNeeded(renderText);
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renderText.dirtyLineBoxes(fullLayout);
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} else if (is<RenderLineBreak>(renderer))
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downcast<RenderLineBreak>(renderer).dirtyLineBoxes(fullLayout);
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else
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downcast<RenderInline>(renderer).dirtyLineBoxes(fullLayout);
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}
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static bool parentIsConstructedOrHaveNext(LegacyInlineFlowBox* parentBox)
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{
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do {
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if (parentBox->isConstructed() || parentBox->nextOnLine())
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return true;
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parentBox = parentBox->parent();
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} while (parentBox);
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return false;
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}
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LegacyInlineFlowBox* LegacyLineLayout::createLineBoxes(RenderObject* obj, const LineInfo& lineInfo, LegacyInlineBox* childBox)
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{
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// See if we have an unconstructed line box for this object that is also
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// the last item on the line.
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unsigned lineDepth = 1;
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LegacyInlineFlowBox* parentBox = nullptr;
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LegacyInlineFlowBox* result = nullptr;
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bool hasDefaultLineBoxContain = style().lineBoxContain() == RenderStyle::initialLineBoxContain();
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do {
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RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(is<RenderInline>(*obj) || obj == &m_flow);
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RenderInline* inlineFlow = obj != &m_flow ? downcast<RenderInline>(obj) : nullptr;
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// Get the last box we made for this render object.
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parentBox = inlineFlow ? inlineFlow->lastLineBox() : downcast<RenderBlockFlow>(*obj).lastRootBox();
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// If this box or its ancestor is constructed then it is from a previous line, and we need
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// to make a new box for our line. If this box or its ancestor is unconstructed but it has
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// something following it on the line, then we know we have to make a new box
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// as well. In this situation our inline has actually been split in two on
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// the same line (this can happen with very fancy language mixtures).
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bool constructedNewBox = false;
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bool allowedToConstructNewBox = !hasDefaultLineBoxContain || !inlineFlow || inlineFlow->alwaysCreateLineBoxes();
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bool canUseExistingParentBox = parentBox && !parentIsConstructedOrHaveNext(parentBox);
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if (allowedToConstructNewBox && !canUseExistingParentBox) {
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// We need to make a new box for this render object. Once
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// made, we need to place it at the end of the current line.
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LegacyInlineBox* newBox = createInlineBoxForRenderer(obj);
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parentBox = downcast<LegacyInlineFlowBox>(newBox);
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parentBox->setIsFirstLine(lineInfo.isFirstLine());
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parentBox->setIsHorizontal(m_flow.isHorizontalWritingMode());
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if (!hasDefaultLineBoxContain)
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parentBox->clearDescendantsHaveSameLineHeightAndBaseline();
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constructedNewBox = true;
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}
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if (constructedNewBox || canUseExistingParentBox) {
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if (!result)
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result = parentBox;
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// If we have hit the block itself, then |box| represents the root
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// inline box for the line, and it doesn't have to be appended to any parent
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// inline.
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if (childBox)
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parentBox->addToLine(childBox);
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if (!constructedNewBox || obj == &m_flow)
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break;
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childBox = parentBox;
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}
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// If we've exceeded our line depth, then jump straight to the root and skip all the remaining
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// intermediate inline flows.
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obj = (++lineDepth >= cMaxLineDepth) ? &m_flow : obj->parent();
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} while (true);
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return result;
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}
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template<typename CharacterType> static inline bool endsWithHTMLSpaces(const CharacterType* characters, unsigned position, unsigned end)
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{
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for (unsigned i = position; i < end; ++i) {
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if (!isHTMLSpace(characters[i]))
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return false;
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}
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return true;
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}
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static bool reachedEndOfTextRenderer(const BidiRunList<BidiRun>& bidiRuns)
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{
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BidiRun* run = bidiRuns.logicallyLastRun();
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if (!run)
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return true;
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if (!is<RenderText>(run->renderer()))
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return false;
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auto& text = downcast<RenderText>(run->renderer()).text();
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unsigned position = run->stop();
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unsigned length = text.length();
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if (text.is8Bit())
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return endsWithHTMLSpaces(text.characters8(), position, length);
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return endsWithHTMLSpaces(text.characters16(), position, length);
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}
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LegacyRootInlineBox* LegacyLineLayout::constructLine(BidiRunList<BidiRun>& bidiRuns, const LineInfo& lineInfo)
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{
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ASSERT(bidiRuns.firstRun());
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LegacyInlineFlowBox* parentBox = 0;
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int runCount = bidiRuns.runCount() - lineInfo.runsFromLeadingWhitespace();
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for (BidiRun* r = bidiRuns.firstRun(); r; r = r->next()) {
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// Create a box for our object.
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bool isOnlyRun = (runCount == 1);
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if (runCount == 2 && !r->renderer().isListMarker())
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isOnlyRun = (!style().isLeftToRightDirection() ? bidiRuns.lastRun() : bidiRuns.firstRun())->renderer().isListMarker();
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if (lineInfo.isEmpty())
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continue;
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LegacyInlineBox* box = createInlineBoxForRenderer(&r->renderer(), isOnlyRun);
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r->setBox(box);
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// If we have no parent box yet, or if the run is not simply a sibling,
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// then we need to construct inline boxes as necessary to properly enclose the
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// run's inline box. Segments can only be siblings at the root level, as
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// they are positioned separately.
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if (!parentBox || &parentBox->renderer() != r->renderer().parent()) {
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// Create new inline boxes all the way back to the appropriate insertion point.
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RenderObject* parentToUse = r->renderer().parent();
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parentBox = createLineBoxes(parentToUse, lineInfo, box);
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} else {
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// Append the inline box to this line.
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parentBox->addToLine(box);
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}
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bool visuallyOrdered = r->renderer().style().rtlOrdering() == Order::Visual;
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box->setBidiLevel(r->level());
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if (is<LegacyInlineTextBox>(*box)) {
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auto& textBox = downcast<LegacyInlineTextBox>(*box);
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textBox.setStart(r->m_start);
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textBox.setLen(r->m_stop - r->m_start);
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textBox.setDirOverride(r->dirOverride(visuallyOrdered));
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if (r->m_hasHyphen)
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textBox.setHasHyphen(true);
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}
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}
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// We should have a root inline box. It should be unconstructed and
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// be the last continuation of our line list.
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ASSERT(lastRootBox() && !lastRootBox()->isConstructed());
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// Set bits on our inline flow boxes that indicate which sides should
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// paint borders/margins/padding. This knowledge will ultimately be used when
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// we determine the horizontal positions and widths of all the inline boxes on
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// the line.
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bool isLogicallyLastRunWrapped = bidiRuns.logicallyLastRun()->renderer().isText() ? !reachedEndOfTextRenderer(bidiRuns) : !is<RenderInline>(bidiRuns.logicallyLastRun()->renderer());
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lastRootBox()->determineSpacingForFlowBoxes(lineInfo.isLastLine(), isLogicallyLastRunWrapped, &bidiRuns.logicallyLastRun()->renderer());
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// Now mark the line boxes as being constructed.
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lastRootBox()->setConstructed();
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// Return the last line.
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return lastRootBox();
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}
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TextAlignMode LegacyLineLayout::textAlignmentForLine(bool endsWithSoftBreak) const
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{
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if (auto overrideAlignment = m_flow.overrideTextAlignmentForLine(endsWithSoftBreak))
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return *overrideAlignment;
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TextAlignMode alignment = style().textAlign();
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#if ENABLE(CSS3_TEXT)
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TextJustify textJustify = style().textJustify();
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if (alignment == TextAlignMode::Justify && textJustify == TextJustify::None)
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return style().direction() == TextDirection::LTR ? TextAlignMode::Left : TextAlignMode::Right;
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#endif
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if (endsWithSoftBreak)
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return alignment;
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#if !ENABLE(CSS3_TEXT)
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return (alignment == TextAlignMode::Justify) ? TextAlignMode::Start : alignment;
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#else
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if (alignment != TextAlignMode::Justify)
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return alignment;
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TextAlignLast alignmentLast = style().textAlignLast();
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switch (alignmentLast) {
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case TextAlignLast::Start:
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return TextAlignMode::Start;
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case TextAlignLast::End:
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return TextAlignMode::End;
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case TextAlignLast::Left:
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return TextAlignMode::Left;
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case TextAlignLast::Right:
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return TextAlignMode::Right;
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case TextAlignLast::Center:
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return TextAlignMode::Center;
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case TextAlignLast::Justify:
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return TextAlignMode::Justify;
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case TextAlignLast::Auto:
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if (textJustify == TextJustify::Distribute)
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return TextAlignMode::Justify;
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return TextAlignMode::Start;
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}
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return alignment;
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#endif
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}
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static void updateLogicalWidthForLeftAlignedBlock(bool isLeftToRightDirection, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float availableLogicalWidth)
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{
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// The direction of the block should determine what happens with wide lines.
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// In particular with RTL blocks, wide lines should still spill out to the left.
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if (isLeftToRightDirection) {
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if (totalLogicalWidth > availableLogicalWidth && trailingSpaceRun)
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trailingSpaceRun->box()->setLogicalWidth(std::max<float>(0, trailingSpaceRun->box()->logicalWidth() - totalLogicalWidth + availableLogicalWidth));
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return;
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}
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if (trailingSpaceRun)
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trailingSpaceRun->box()->setLogicalWidth(0);
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else if (totalLogicalWidth > availableLogicalWidth)
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logicalLeft -= (totalLogicalWidth - availableLogicalWidth);
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}
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static void updateLogicalWidthForRightAlignedBlock(bool isLeftToRightDirection, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float availableLogicalWidth)
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{
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// Wide lines spill out of the block based off direction.
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// So even if text-align is right, if direction is LTR, wide lines should overflow out of the right
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// side of the block.
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if (isLeftToRightDirection) {
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if (trailingSpaceRun) {
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totalLogicalWidth -= trailingSpaceRun->box()->logicalWidth();
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trailingSpaceRun->box()->setLogicalWidth(0);
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}
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logicalLeft += std::max(0.f, availableLogicalWidth - totalLogicalWidth);
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return;
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}
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if (totalLogicalWidth > availableLogicalWidth && trailingSpaceRun) {
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trailingSpaceRun->box()->setLogicalWidth(std::max<float>(0, trailingSpaceRun->box()->logicalWidth() - totalLogicalWidth + availableLogicalWidth));
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totalLogicalWidth -= trailingSpaceRun->box()->logicalWidth();
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} else
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logicalLeft += availableLogicalWidth - totalLogicalWidth;
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}
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static void updateLogicalWidthForCenterAlignedBlock(bool isLeftToRightDirection, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float availableLogicalWidth)
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{
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float trailingSpaceWidth = 0;
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if (trailingSpaceRun) {
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totalLogicalWidth -= trailingSpaceRun->box()->logicalWidth();
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trailingSpaceWidth = std::min(trailingSpaceRun->box()->logicalWidth(), (availableLogicalWidth - totalLogicalWidth + 1) / 2);
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trailingSpaceRun->box()->setLogicalWidth(std::max<float>(0, trailingSpaceWidth));
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}
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if (isLeftToRightDirection)
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logicalLeft += std::max<float>((availableLogicalWidth - totalLogicalWidth) / 2, 0);
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else
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logicalLeft += totalLogicalWidth > availableLogicalWidth ? (availableLogicalWidth - totalLogicalWidth) : (availableLogicalWidth - totalLogicalWidth) / 2 - trailingSpaceWidth;
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}
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void LegacyLineLayout::setMarginsForRubyRun(BidiRun* run, RenderRubyRun& renderer, RenderObject* previousObject, const LineInfo& lineInfo)
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{
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float startOverhang;
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float endOverhang;
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RenderObject* nextObject = 0;
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for (BidiRun* runWithNextObject = run->next(); runWithNextObject; runWithNextObject = runWithNextObject->next()) {
|
|
if (!runWithNextObject->renderer().isOutOfFlowPositioned() && !runWithNextObject->box()->isLineBreak()) {
|
|
nextObject = &runWithNextObject->renderer();
|
|
break;
|
|
}
|
|
}
|
|
renderer.getOverhang(lineInfo.isFirstLine(), renderer.style().isLeftToRightDirection() ? previousObject : nextObject, renderer.style().isLeftToRightDirection() ? nextObject : previousObject, startOverhang, endOverhang);
|
|
m_flow.setMarginStartForChild(renderer, LayoutUnit(-startOverhang));
|
|
m_flow.setMarginEndForChild(renderer, LayoutUnit(-endOverhang));
|
|
}
|
|
|
|
static inline void setLogicalWidthForTextRun(LegacyRootInlineBox* lineBox, BidiRun* run, RenderText& renderer, float xPos, const LineInfo& lineInfo,
|
|
GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache, WordMeasurements& wordMeasurements)
|
|
{
|
|
HashSet<const Font*> fallbackFonts;
|
|
GlyphOverflow glyphOverflow;
|
|
|
|
const FontCascade& font = lineStyle(*renderer.parent(), lineInfo).fontCascade();
|
|
// Always compute glyph overflow if the block's line-box-contain value is "glyphs".
|
|
if (lineBox->fitsToGlyphs()) {
|
|
// If we don't stick out of the root line's font box, then don't bother computing our glyph overflow. This optimization
|
|
// will keep us from computing glyph bounds in nearly all cases.
|
|
bool includeRootLine = lineBox->includesRootLineBoxFontOrLeading();
|
|
int baselineShift = lineBox->verticalPositionForBox(run->box(), verticalPositionCache);
|
|
int rootDescent = includeRootLine ? font.fontMetrics().descent() : 0;
|
|
int rootAscent = includeRootLine ? font.fontMetrics().ascent() : 0;
|
|
int boxAscent = font.fontMetrics().ascent() - baselineShift;
|
|
int boxDescent = font.fontMetrics().descent() + baselineShift;
|
|
if (boxAscent > rootDescent || boxDescent > rootAscent)
|
|
glyphOverflow.computeBounds = true;
|
|
}
|
|
|
|
LayoutUnit hyphenWidth;
|
|
if (downcast<LegacyInlineTextBox>(*run->box()).hasHyphen())
|
|
hyphenWidth = measureHyphenWidth(renderer, font, &fallbackFonts);
|
|
|
|
float measuredWidth = 0;
|
|
|
|
bool kerningIsEnabled = font.enableKerning();
|
|
bool canUseSimpleFontCodePath = renderer.canUseSimpleFontCodePath();
|
|
|
|
// Since we don't cache glyph overflows, we need to re-measure the run if
|
|
// the style is linebox-contain: glyph.
|
|
if (!lineBox->fitsToGlyphs() && canUseSimpleFontCodePath) {
|
|
unsigned lastEndOffset = run->m_start;
|
|
bool atFirstWordMeasurement = true;
|
|
for (size_t i = 0, size = wordMeasurements.size(); i < size && lastEndOffset < run->m_stop; ++i) {
|
|
WordMeasurement& wordMeasurement = wordMeasurements[i];
|
|
if (wordMeasurement.width <= 0 || wordMeasurement.startOffset == wordMeasurement.endOffset)
|
|
continue;
|
|
if (wordMeasurement.renderer != &renderer || wordMeasurement.startOffset != lastEndOffset || wordMeasurement.endOffset > run->m_stop)
|
|
continue;
|
|
|
|
lastEndOffset = wordMeasurement.endOffset;
|
|
if (kerningIsEnabled && lastEndOffset == run->m_stop) {
|
|
int wordLength = lastEndOffset - wordMeasurement.startOffset;
|
|
GlyphOverflow overflow;
|
|
measuredWidth += renderer.width(wordMeasurement.startOffset, wordLength, xPos + measuredWidth, lineInfo.isFirstLine(),
|
|
&wordMeasurement.fallbackFonts, &overflow);
|
|
UChar c = renderer.characterAt(wordMeasurement.startOffset);
|
|
// renderer.width() omits word-spacing value for leading whitespace, so let's just add it back here.
|
|
if (!atFirstWordMeasurement && FontCascade::treatAsSpace(c))
|
|
measuredWidth += renderer.style().fontCascade().wordSpacing();
|
|
} else
|
|
measuredWidth += wordMeasurement.width;
|
|
atFirstWordMeasurement = false;
|
|
|
|
for (auto& font : wordMeasurement.fallbackFonts)
|
|
fallbackFonts.add(font);
|
|
}
|
|
if (measuredWidth && lastEndOffset != run->m_stop) {
|
|
// If we don't have enough cached data, we'll measure the run again.
|
|
measuredWidth = 0;
|
|
fallbackFonts.clear();
|
|
}
|
|
}
|
|
|
|
if (!measuredWidth)
|
|
measuredWidth = renderer.width(run->m_start, run->m_stop - run->m_start, xPos, lineInfo.isFirstLine(), &fallbackFonts, &glyphOverflow);
|
|
|
|
ASSERT(measuredWidth >= 0);
|
|
ASSERT(hyphenWidth >= 0);
|
|
|
|
run->box()->setLogicalWidth(measuredWidth + hyphenWidth);
|
|
if (!fallbackFonts.isEmpty()) {
|
|
ASSERT(run->box()->behavesLikeText());
|
|
GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.add(downcast<LegacyInlineTextBox>(run->box()), std::make_pair(Vector<const Font*>(), GlyphOverflow())).iterator;
|
|
ASSERT(it->value.first.isEmpty());
|
|
it->value.first = copyToVector(fallbackFonts);
|
|
run->box()->parent()->clearDescendantsHaveSameLineHeightAndBaseline();
|
|
}
|
|
|
|
// Include text decoration visual overflow as part of the glyph overflow.
|
|
if (!renderer.style().textDecorationsInEffect().isEmpty())
|
|
glyphOverflow.extendTo(visualOverflowForDecorations(run->box()->lineStyle(), LayoutIntegration::textRunFor(downcast<LegacyInlineTextBox>(run->box()))));
|
|
|
|
if (!glyphOverflow.isEmpty()) {
|
|
ASSERT(run->box()->behavesLikeText());
|
|
GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.add(downcast<LegacyInlineTextBox>(run->box()), std::make_pair(Vector<const Font*>(), GlyphOverflow())).iterator;
|
|
it->value.second = glyphOverflow;
|
|
run->box()->clearKnownToHaveNoOverflow();
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::updateRubyForJustifiedText(RenderRubyRun& rubyRun, BidiRun& r, const Vector<unsigned, 16>& expansionOpportunities, unsigned& expansionOpportunityCount, float& totalLogicalWidth, float availableLogicalWidth, size_t& i)
|
|
{
|
|
if (!rubyRun.rubyBase() || !rubyRun.rubyBase()->firstRootBox() || rubyRun.rubyBase()->firstRootBox()->nextRootBox() || !r.renderer().style().collapseWhiteSpace())
|
|
return;
|
|
|
|
auto& rubyBase = *rubyRun.rubyBase();
|
|
auto& rootBox = *rubyBase.firstRootBox();
|
|
|
|
float totalExpansion = 0;
|
|
unsigned totalOpportunitiesInRun = 0;
|
|
for (auto* leafChild = rootBox.firstLeafDescendant(); leafChild; leafChild = leafChild->nextLeafOnLine()) {
|
|
if (!leafChild->isInlineTextBox())
|
|
continue;
|
|
|
|
unsigned opportunitiesInRun = expansionOpportunities[i++];
|
|
ASSERT(opportunitiesInRun <= expansionOpportunityCount);
|
|
auto expansion = (availableLogicalWidth - totalLogicalWidth) * opportunitiesInRun / expansionOpportunityCount;
|
|
totalExpansion += expansion;
|
|
totalOpportunitiesInRun += opportunitiesInRun;
|
|
}
|
|
|
|
ASSERT(!rubyRun.hasOverridingLogicalWidth());
|
|
float newBaseWidth = rubyRun.logicalWidth() + totalExpansion + m_flow.marginStartForChild(rubyRun) + m_flow.marginEndForChild(rubyRun);
|
|
float newRubyRunWidth = rubyRun.logicalWidth() + totalExpansion;
|
|
rubyBase.setInitialOffset((newRubyRunWidth - newBaseWidth) / 2);
|
|
rubyRun.setOverridingLogicalWidth(LayoutUnit(newRubyRunWidth));
|
|
rubyRun.setNeedsLayout(MarkOnlyThis);
|
|
rootBox.markDirty();
|
|
if (RenderRubyText* rubyText = rubyRun.rubyText()) {
|
|
if (LegacyRootInlineBox* textRootBox = rubyText->firstRootBox())
|
|
textRootBox->markDirty();
|
|
}
|
|
rubyRun.layoutBlock(true);
|
|
rubyRun.clearOverridingLogicalWidth();
|
|
r.box()->setExpansion(newRubyRunWidth - r.box()->logicalWidth());
|
|
|
|
totalLogicalWidth += totalExpansion;
|
|
expansionOpportunityCount -= totalOpportunitiesInRun;
|
|
}
|
|
|
|
void LegacyLineLayout::computeExpansionForJustifiedText(BidiRun* firstRun, BidiRun* trailingSpaceRun, const Vector<unsigned, 16>& expansionOpportunities, unsigned expansionOpportunityCount, float totalLogicalWidth, float availableLogicalWidth)
|
|
{
|
|
if (!expansionOpportunityCount || availableLogicalWidth <= totalLogicalWidth)
|
|
return;
|
|
|
|
size_t i = 0;
|
|
for (BidiRun* run = firstRun; run; run = run->next()) {
|
|
if (!run->box() || run == trailingSpaceRun)
|
|
continue;
|
|
|
|
if (is<RenderText>(run->renderer())) {
|
|
unsigned opportunitiesInRun = expansionOpportunities[i++];
|
|
|
|
ASSERT(opportunitiesInRun <= expansionOpportunityCount);
|
|
|
|
// Only justify text if whitespace is collapsed.
|
|
if (run->renderer().style().collapseWhiteSpace()) {
|
|
LegacyInlineTextBox& textBox = downcast<LegacyInlineTextBox>(*run->box());
|
|
float expansion = (availableLogicalWidth - totalLogicalWidth) * opportunitiesInRun / expansionOpportunityCount;
|
|
textBox.setExpansion(expansion);
|
|
totalLogicalWidth += expansion;
|
|
}
|
|
expansionOpportunityCount -= opportunitiesInRun;
|
|
} else if (is<RenderRubyRun>(run->renderer()))
|
|
updateRubyForJustifiedText(downcast<RenderRubyRun>(run->renderer()), *run, expansionOpportunities, expansionOpportunityCount, totalLogicalWidth, availableLogicalWidth, i);
|
|
|
|
if (!expansionOpportunityCount)
|
|
break;
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::updateLogicalWidthForAlignment(RenderBlockFlow& flow, const TextAlignMode& textAlign, const LegacyRootInlineBox* rootInlineBox, BidiRun* trailingSpaceRun, float& logicalLeft, float& totalLogicalWidth, float& availableLogicalWidth, int expansionOpportunityCount)
|
|
{
|
|
TextDirection direction;
|
|
if (rootInlineBox && flow.style().unicodeBidi() == Plaintext)
|
|
direction = rootInlineBox->direction();
|
|
else
|
|
direction = flow.style().direction();
|
|
|
|
bool isLeftToRightDirection = flow.style().isLeftToRightDirection();
|
|
|
|
// Armed with the total width of the line (without justification),
|
|
// we now examine our text-align property in order to determine where to position the
|
|
// objects horizontally. The total width of the line can be increased if we end up
|
|
// justifying text.
|
|
switch (textAlign) {
|
|
case TextAlignMode::Left:
|
|
case TextAlignMode::WebKitLeft:
|
|
updateLogicalWidthForLeftAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
break;
|
|
case TextAlignMode::Right:
|
|
case TextAlignMode::WebKitRight:
|
|
updateLogicalWidthForRightAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
break;
|
|
case TextAlignMode::Center:
|
|
case TextAlignMode::WebKitCenter:
|
|
updateLogicalWidthForCenterAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
break;
|
|
case TextAlignMode::Justify:
|
|
flow.adjustInlineDirectionLineBounds(expansionOpportunityCount, logicalLeft, availableLogicalWidth);
|
|
if (expansionOpportunityCount) {
|
|
if (trailingSpaceRun) {
|
|
totalLogicalWidth -= trailingSpaceRun->box()->logicalWidth();
|
|
trailingSpaceRun->box()->setLogicalWidth(0);
|
|
}
|
|
break;
|
|
}
|
|
FALLTHROUGH;
|
|
case TextAlignMode::Start:
|
|
if (direction == TextDirection::LTR)
|
|
updateLogicalWidthForLeftAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
else
|
|
updateLogicalWidthForRightAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
break;
|
|
case TextAlignMode::End:
|
|
if (direction == TextDirection::LTR)
|
|
updateLogicalWidthForRightAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
else
|
|
updateLogicalWidthForLeftAlignedBlock(isLeftToRightDirection, trailingSpaceRun, logicalLeft, totalLogicalWidth, availableLogicalWidth);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void updateLogicalInlinePositions(RenderBlockFlow& block, float& lineLogicalLeft, float& lineLogicalRight, float& availableLogicalWidth, bool firstLine,
|
|
IndentTextOrNot shouldIndentText, LayoutUnit boxLogicalHeight)
|
|
{
|
|
LayoutUnit lineLogicalHeight = block.minLineHeightForReplacedRenderer(firstLine, boxLogicalHeight);
|
|
lineLogicalLeft = block.logicalLeftOffsetForLine(block.logicalHeight(), shouldIndentText, lineLogicalHeight);
|
|
lineLogicalRight = block.logicalRightOffsetForLine(block.logicalHeight(), shouldIndentText, lineLogicalHeight);
|
|
availableLogicalWidth = lineLogicalRight - lineLogicalLeft;
|
|
}
|
|
|
|
void LegacyLineLayout::computeInlineDirectionPositionsForLine(LegacyRootInlineBox* lineBox, const LineInfo& lineInfo, BidiRun* firstRun, BidiRun* trailingSpaceRun, bool reachedEnd, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache, WordMeasurements& wordMeasurements)
|
|
{
|
|
TextAlignMode textAlign = textAlignmentForLine(!reachedEnd && !lineBox->endsWithBreak());
|
|
|
|
// CSS 2.1: "'Text-indent' only affects a line if it is the first formatted line of an element. For example, the first line of an anonymous block
|
|
// box is only affected if it is the first child of its parent element."
|
|
// CSS3 "text-indent", "-webkit-each-line" affects the first line of the block container as well as each line after a forced line break,
|
|
// but does not affect lines after a soft wrap break.
|
|
bool isFirstLine = lineInfo.isFirstLine() && !(m_flow.isAnonymousBlock() && m_flow.parent()->firstChild() != &m_flow);
|
|
bool isAfterHardLineBreak = lineBox->prevRootBox() && lineBox->prevRootBox()->endsWithBreak();
|
|
IndentTextOrNot shouldIndentText = requiresIndent(isFirstLine, isAfterHardLineBreak, style());
|
|
float lineLogicalLeft;
|
|
float lineLogicalRight;
|
|
float availableLogicalWidth;
|
|
updateLogicalInlinePositions(m_flow, lineLogicalLeft, lineLogicalRight, availableLogicalWidth, isFirstLine, shouldIndentText, 0);
|
|
bool needsWordSpacing;
|
|
|
|
if (firstRun && firstRun->renderer().isReplaced()) {
|
|
RenderBox& renderBox = downcast<RenderBox>(firstRun->renderer());
|
|
updateLogicalInlinePositions(m_flow, lineLogicalLeft, lineLogicalRight, availableLogicalWidth, isFirstLine, shouldIndentText, renderBox.logicalHeight());
|
|
}
|
|
|
|
computeInlineDirectionPositionsForSegment(lineBox, lineInfo, textAlign, lineLogicalLeft, availableLogicalWidth, firstRun, trailingSpaceRun, textBoxDataMap, verticalPositionCache, wordMeasurements);
|
|
// The widths of all runs are now known. We can now place every inline box (and
|
|
// compute accurate widths for the inline flow boxes).
|
|
needsWordSpacing = false;
|
|
lineBox->placeBoxesInInlineDirection(lineLogicalLeft, needsWordSpacing);
|
|
}
|
|
|
|
static inline ExpansionBehavior expansionBehaviorForInlineTextBox(RenderBlockFlow& block, LegacyInlineTextBox& textBox, BidiRun* previousRun, BidiRun* nextRun, TextAlignMode textAlign, bool isAfterExpansion)
|
|
{
|
|
// Tatechuyoko is modeled as the Object Replacement Character (U+FFFC), which can never have expansion opportunities inside nor intrinsically adjacent to it.
|
|
if (textBox.renderer().style().textCombine() == TextCombine::Horizontal)
|
|
return ForbidLeftExpansion | ForbidRightExpansion;
|
|
|
|
ExpansionBehavior result = 0;
|
|
bool setLeftExpansion = false;
|
|
bool setRightExpansion = false;
|
|
if (textAlign == TextAlignMode::Justify) {
|
|
// If the next box is ruby, and we're justifying, and the first box in the ruby base has a leading expansion, and we are a text box, then force a trailing expansion.
|
|
if (nextRun && is<RenderRubyRun>(nextRun->renderer()) && downcast<RenderRubyRun>(nextRun->renderer()).rubyBase() && nextRun->renderer().style().collapseWhiteSpace()) {
|
|
auto& rubyBase = *downcast<RenderRubyRun>(nextRun->renderer()).rubyBase();
|
|
if (rubyBase.firstRootBox() && !rubyBase.firstRootBox()->nextRootBox()) {
|
|
if (auto* leafChild = rubyBase.firstRootBox()->firstLeafDescendant()) {
|
|
if (is<LegacyInlineTextBox>(*leafChild)) {
|
|
// FIXME: This leftExpansionOpportunity doesn't actually work because it doesn't perform the UBA
|
|
if (FontCascade::leftExpansionOpportunity(downcast<RenderText>(leafChild->renderer()).stringView(), leafChild->direction())) {
|
|
setRightExpansion = true;
|
|
result |= ForceRightExpansion;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Same thing, except if we're following a ruby
|
|
if (previousRun && is<RenderRubyRun>(previousRun->renderer()) && downcast<RenderRubyRun>(previousRun->renderer()).rubyBase() && previousRun->renderer().style().collapseWhiteSpace()) {
|
|
auto& rubyBase = *downcast<RenderRubyRun>(previousRun->renderer()).rubyBase();
|
|
if (rubyBase.firstRootBox() && !rubyBase.firstRootBox()->nextRootBox()) {
|
|
if (auto* leafChild = rubyBase.firstRootBox()->lastLeafDescendant()) {
|
|
if (is<LegacyInlineTextBox>(*leafChild)) {
|
|
// FIXME: This leftExpansionOpportunity doesn't actually work because it doesn't perform the UBA
|
|
if (FontCascade::rightExpansionOpportunity(downcast<RenderText>(leafChild->renderer()).stringView(), leafChild->direction())) {
|
|
setLeftExpansion = true;
|
|
result |= ForceLeftExpansion;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// If we're the first box inside a ruby base, forbid a leading expansion, and vice-versa
|
|
if (is<RenderRubyBase>(block)) {
|
|
RenderRubyBase& rubyBase = downcast<RenderRubyBase>(block);
|
|
if (&textBox == rubyBase.firstRootBox()->firstLeafDescendant()) {
|
|
setLeftExpansion = true;
|
|
result |= ForbidLeftExpansion;
|
|
} if (&textBox == rubyBase.firstRootBox()->lastLeafDescendant()) {
|
|
setRightExpansion = true;
|
|
result |= ForbidRightExpansion;
|
|
}
|
|
}
|
|
}
|
|
if (!setLeftExpansion)
|
|
result |= isAfterExpansion ? ForbidLeftExpansion : AllowLeftExpansion;
|
|
if (!setRightExpansion)
|
|
result |= AllowRightExpansion;
|
|
return result;
|
|
}
|
|
|
|
static inline void applyExpansionBehavior(LegacyInlineTextBox& textBox, ExpansionBehavior expansionBehavior)
|
|
{
|
|
switch (expansionBehavior & LeftExpansionMask) {
|
|
case ForceLeftExpansion:
|
|
textBox.setForceLeftExpansion();
|
|
break;
|
|
case ForbidLeftExpansion:
|
|
textBox.setCanHaveLeftExpansion(false);
|
|
break;
|
|
case AllowLeftExpansion:
|
|
textBox.setCanHaveLeftExpansion(true);
|
|
break;
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
break;
|
|
}
|
|
switch (expansionBehavior & RightExpansionMask) {
|
|
case ForceRightExpansion:
|
|
textBox.setForceRightExpansion();
|
|
break;
|
|
case ForbidRightExpansion:
|
|
textBox.setCanHaveRightExpansion(false);
|
|
break;
|
|
case AllowRightExpansion:
|
|
textBox.setCanHaveRightExpansion(true);
|
|
break;
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static bool inlineAncestorHasStartBorderPaddingOrMargin(const RenderBlockFlow& block, const LegacyInlineBox& box)
|
|
{
|
|
bool isLTR = block.style().isLeftToRightDirection();
|
|
for (auto* currentBox = box.parent(); currentBox; currentBox = currentBox->parent()) {
|
|
if ((isLTR && currentBox->marginBorderPaddingLogicalLeft() > 0)
|
|
|| (!isLTR && currentBox->marginBorderPaddingLogicalRight() > 0))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool inlineAncestorHasEndBorderPaddingOrMargin(const RenderBlockFlow& block, const LegacyInlineBox& box)
|
|
{
|
|
bool isLTR = block.style().isLeftToRightDirection();
|
|
for (auto* currentBox = box.parent(); currentBox; currentBox = currentBox->parent()) {
|
|
if ((isLTR && currentBox->marginBorderPaddingLogicalRight() > 0)
|
|
|| (!isLTR && currentBox->marginBorderPaddingLogicalLeft() > 0))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool isLastInFlowRun(BidiRun& runToCheck)
|
|
{
|
|
for (auto* run = runToCheck.next(); run; run = run->next()) {
|
|
if (!run->box() || run->renderer().isOutOfFlowPositioned() || run->box()->isLineBreak())
|
|
continue;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
BidiRun* LegacyLineLayout::computeInlineDirectionPositionsForSegment(LegacyRootInlineBox* lineBox, const LineInfo& lineInfo, TextAlignMode textAlign, float& lineLogicalLeft,
|
|
float& availableLogicalWidth, BidiRun* firstRun, BidiRun* trailingSpaceRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache,
|
|
WordMeasurements& wordMeasurements)
|
|
{
|
|
bool needsWordSpacing = false;
|
|
bool canHangPunctuationAtStart = style().hangingPunctuation().contains(HangingPunctuation::First);
|
|
bool canHangPunctuationAtEnd = style().hangingPunctuation().contains(HangingPunctuation::Last);
|
|
bool isLTR = style().isLeftToRightDirection();
|
|
float contentWidth = 0;
|
|
unsigned expansionOpportunityCount = 0;
|
|
bool isAfterExpansion = is<RenderRubyBase>(m_flow) ? downcast<RenderRubyBase>(m_flow).isAfterExpansion() : true;
|
|
Vector<unsigned, 16> expansionOpportunities;
|
|
|
|
HashMap<LegacyInlineTextBox*, LayoutUnit> logicalSpacingForInlineTextBoxes;
|
|
auto collectSpacingLogicalWidths = [&] () {
|
|
auto totalSpacingWidth = LayoutUnit { };
|
|
// Collect the spacing positions (margin, border padding) for the textboxes by traversing the inline tree of the current line.
|
|
Vector<LegacyInlineBox*> queue;
|
|
queue.append(lineBox);
|
|
// 1. Visit each inline box in a preorder fashion
|
|
// 2. Accumulate the spacing when we find an LegacyInlineFlowBox (inline container e.g. span)
|
|
// 3. Add the LegacyInlineTextBoxes to the hashmap
|
|
while (!queue.isEmpty()) {
|
|
while (true) {
|
|
auto* inlineBox = queue.last();
|
|
if (is<LegacyInlineFlowBox>(inlineBox)) {
|
|
auto& inlineFlowBox = downcast<LegacyInlineFlowBox>(*inlineBox);
|
|
totalSpacingWidth += inlineFlowBox.marginBorderPaddingLogicalLeft();
|
|
if (auto* child = inlineFlowBox.firstChild()) {
|
|
queue.append(child);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (is<LegacyInlineTextBox>(inlineBox))
|
|
logicalSpacingForInlineTextBoxes.add(downcast<LegacyInlineTextBox>(inlineBox), totalSpacingWidth);
|
|
break;
|
|
}
|
|
while (!queue.isEmpty()) {
|
|
auto& inlineBox = *queue.takeLast();
|
|
if (is<LegacyInlineFlowBox>(inlineBox))
|
|
totalSpacingWidth += downcast<LegacyInlineFlowBox>(inlineBox).marginBorderPaddingLogicalRight();
|
|
if (auto* nextSibling = inlineBox.nextOnLine()) {
|
|
queue.append(nextSibling);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
collectSpacingLogicalWidths();
|
|
|
|
BidiRun* run = firstRun;
|
|
BidiRun* previousRun = nullptr;
|
|
for (; run; run = run->next()) {
|
|
auto computeExpansionOpportunities = [&expansionOpportunities, &expansionOpportunityCount, textAlign, &isAfterExpansion] (RenderBlockFlow& block,
|
|
LegacyInlineTextBox& textBox, BidiRun* previousRun, BidiRun* nextRun, const StringView& stringView, TextDirection direction)
|
|
{
|
|
if (stringView.isEmpty()) {
|
|
// Empty runs should still produce an entry in expansionOpportunities list so that the number of items matches the number of runs.
|
|
expansionOpportunities.append(0);
|
|
return;
|
|
}
|
|
ExpansionBehavior expansionBehavior = expansionBehaviorForInlineTextBox(block, textBox, previousRun, nextRun, textAlign, isAfterExpansion);
|
|
applyExpansionBehavior(textBox, expansionBehavior);
|
|
unsigned opportunitiesInRun;
|
|
std::tie(opportunitiesInRun, isAfterExpansion) = FontCascade::expansionOpportunityCount(stringView, direction, expansionBehavior);
|
|
expansionOpportunities.append(opportunitiesInRun);
|
|
expansionOpportunityCount += opportunitiesInRun;
|
|
};
|
|
if (!run->box() || run->renderer().isOutOfFlowPositioned() || run->box()->isLineBreak()) {
|
|
// Positioned objects are only participating to figure out their correct static x position.
|
|
// They have no effect on the width. Similarly, line break boxes have no effect on the width.
|
|
continue;
|
|
}
|
|
if (is<RenderText>(run->renderer())) {
|
|
auto& renderText = downcast<RenderText>(run->renderer());
|
|
auto& textBox = downcast<LegacyInlineTextBox>(*run->box());
|
|
if (canHangPunctuationAtStart && lineInfo.isFirstLine() && (isLTR || isLastInFlowRun(*run))
|
|
&& !inlineAncestorHasStartBorderPaddingOrMargin(m_flow, *run->box())) {
|
|
float hangStartWidth = renderText.hangablePunctuationStartWidth(run->m_start);
|
|
availableLogicalWidth += hangStartWidth;
|
|
if (style().isLeftToRightDirection())
|
|
lineLogicalLeft -= hangStartWidth;
|
|
canHangPunctuationAtStart = false;
|
|
}
|
|
|
|
if (canHangPunctuationAtEnd && lineInfo.isLastLine() && run->m_stop > 0 && (!isLTR || isLastInFlowRun(*run))
|
|
&& !inlineAncestorHasEndBorderPaddingOrMargin(m_flow, *run->box())) {
|
|
float hangEndWidth = renderText.hangablePunctuationEndWidth(run->m_stop - 1);
|
|
availableLogicalWidth += hangEndWidth;
|
|
if (!style().isLeftToRightDirection())
|
|
lineLogicalLeft -= hangEndWidth;
|
|
canHangPunctuationAtEnd = false;
|
|
}
|
|
|
|
if (textAlign == TextAlignMode::Justify && run != trailingSpaceRun)
|
|
computeExpansionOpportunities(m_flow, textBox, previousRun, run->next(), renderText.stringView(run->m_start, run->m_stop), run->box()->direction());
|
|
|
|
if (unsigned length = renderText.text().length()) {
|
|
if (!run->m_start && needsWordSpacing && isSpaceOrNewline(renderText.characterAt(run->m_start)))
|
|
contentWidth += lineStyle(*renderText.parent(), lineInfo).fontCascade().wordSpacing();
|
|
// run->m_start == run->m_stop should only be true iff the run is a replaced run for bidi: isolate.
|
|
ASSERT(run->m_stop > 0 || run->m_start == run->m_stop);
|
|
needsWordSpacing = run->m_stop == length && !isSpaceOrNewline(renderText.characterAt(run->m_stop - 1));
|
|
}
|
|
auto currentLogicalLeftPosition = logicalSpacingForInlineTextBoxes.get(&textBox) + contentWidth;
|
|
setLogicalWidthForTextRun(lineBox, run, renderText, currentLogicalLeftPosition, lineInfo, textBoxDataMap, verticalPositionCache, wordMeasurements);
|
|
} else {
|
|
canHangPunctuationAtStart = false;
|
|
bool encounteredJustifiedRuby = false;
|
|
if (is<RenderRubyRun>(run->renderer()) && textAlign == TextAlignMode::Justify && run != trailingSpaceRun && downcast<RenderRubyRun>(run->renderer()).rubyBase()) {
|
|
auto* rubyBase = downcast<RenderRubyRun>(run->renderer()).rubyBase();
|
|
if (rubyBase->firstRootBox() && !rubyBase->firstRootBox()->nextRootBox() && run->renderer().style().collapseWhiteSpace()) {
|
|
rubyBase->setIsAfterExpansion(isAfterExpansion);
|
|
for (auto* leafChild = rubyBase->firstRootBox()->firstLeafDescendant(); leafChild; leafChild = leafChild->nextLeafOnLine()) {
|
|
if (!is<LegacyInlineTextBox>(*leafChild))
|
|
continue;
|
|
encounteredJustifiedRuby = true;
|
|
computeExpansionOpportunities(*rubyBase, downcast<LegacyInlineTextBox>(*leafChild), nullptr, nullptr,
|
|
downcast<RenderText>(leafChild->renderer()).stringView(), leafChild->direction());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!encounteredJustifiedRuby)
|
|
isAfterExpansion = false;
|
|
|
|
if (!is<RenderInline>(run->renderer())) {
|
|
auto& renderBox = downcast<RenderBox>(run->renderer());
|
|
if (is<RenderRubyRun>(renderBox))
|
|
setMarginsForRubyRun(run, downcast<RenderRubyRun>(renderBox), previousRun ? &previousRun->renderer() : nullptr, lineInfo);
|
|
run->box()->setLogicalWidth(m_flow.logicalWidthForChild(renderBox));
|
|
contentWidth += m_flow.marginStartForChild(renderBox) + m_flow.marginEndForChild(renderBox);
|
|
}
|
|
}
|
|
|
|
contentWidth += run->box()->logicalWidth();
|
|
previousRun = run;
|
|
}
|
|
|
|
if (isAfterExpansion && !expansionOpportunities.isEmpty()) {
|
|
// FIXME: see <webkit.org/b/139393#c11>
|
|
int lastValidExpansionOpportunitiesIndex = expansionOpportunities.size() - 1;
|
|
while (lastValidExpansionOpportunitiesIndex >= 0 && !expansionOpportunities.at(lastValidExpansionOpportunitiesIndex))
|
|
--lastValidExpansionOpportunitiesIndex;
|
|
if (lastValidExpansionOpportunitiesIndex >= 0) {
|
|
ASSERT(expansionOpportunities.at(lastValidExpansionOpportunitiesIndex));
|
|
expansionOpportunities.at(lastValidExpansionOpportunitiesIndex)--;
|
|
expansionOpportunityCount--;
|
|
}
|
|
}
|
|
|
|
if (is<RenderRubyBase>(m_flow) && !expansionOpportunityCount)
|
|
textAlign = TextAlignMode::Center;
|
|
|
|
auto totalLogicalWidth = contentWidth + lineBox->getFlowSpacingLogicalWidth();
|
|
updateLogicalWidthForAlignment(m_flow, textAlign, lineBox, trailingSpaceRun, lineLogicalLeft, totalLogicalWidth, availableLogicalWidth, expansionOpportunityCount);
|
|
computeExpansionForJustifiedText(firstRun, trailingSpaceRun, expansionOpportunities, expansionOpportunityCount, totalLogicalWidth, availableLogicalWidth);
|
|
return run;
|
|
}
|
|
|
|
void LegacyLineLayout::removeInlineBox(BidiRun& run, const LegacyRootInlineBox& rootLineBox) const
|
|
{
|
|
auto* inlineBox = run.box();
|
|
#if ASSERT_ENABLED
|
|
auto* inlineParent = inlineBox->parent();
|
|
while (inlineParent && inlineParent != &rootLineBox) {
|
|
ASSERT(!inlineParent->isDirty());
|
|
inlineParent = inlineParent->parent();
|
|
}
|
|
ASSERT(!rootLineBox.isDirty());
|
|
#endif
|
|
auto* parent = inlineBox->parent();
|
|
inlineBox->removeFromParent();
|
|
|
|
auto& renderer = run.renderer();
|
|
if (is<RenderText>(renderer))
|
|
downcast<RenderText>(renderer).removeTextBox(downcast<LegacyInlineTextBox>(*inlineBox));
|
|
delete inlineBox;
|
|
run.setBox(nullptr);
|
|
// removeFromParent() unnecessarily dirties the ancestor subtree.
|
|
auto* ancestor = parent;
|
|
while (ancestor) {
|
|
ancestor->markDirty(false);
|
|
if (ancestor == &rootLineBox)
|
|
break;
|
|
ancestor = ancestor->parent();
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::computeBlockDirectionPositionsForLine(LegacyRootInlineBox* lineBox, BidiRun* firstRun, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, VerticalPositionCache& verticalPositionCache)
|
|
{
|
|
m_flow.setLogicalHeight(lineBox->alignBoxesInBlockDirection(m_flow.logicalHeight(), textBoxDataMap, verticalPositionCache));
|
|
|
|
// Now make sure we place replaced render objects correctly.
|
|
for (auto* run = firstRun; run; run = run->next()) {
|
|
ASSERT(run->box());
|
|
if (!run->box())
|
|
continue; // Skip runs with no line boxes.
|
|
|
|
// Align positioned boxes with the top of the line box. This is
|
|
// a reasonable approximation of an appropriate y position.
|
|
auto& renderer = run->renderer();
|
|
if (renderer.isOutOfFlowPositioned())
|
|
run->box()->setLogicalTop(m_flow.logicalHeight());
|
|
|
|
// Position is used to properly position both replaced elements and
|
|
// to update the static normal flow x/y of positioned elements.
|
|
bool inlineBoxIsRedundant = false;
|
|
if (is<RenderText>(renderer)) {
|
|
auto& inlineTextBox = downcast<LegacyInlineTextBox>(*run->box());
|
|
downcast<RenderText>(renderer).positionLineBox(inlineTextBox);
|
|
inlineBoxIsRedundant = !inlineTextBox.hasTextContent();
|
|
} else if (is<RenderBox>(renderer)) {
|
|
downcast<RenderBox>(renderer).positionLineBox(downcast<LegacyInlineElementBox>(*run->box()));
|
|
inlineBoxIsRedundant = renderer.isOutOfFlowPositioned();
|
|
} else if (is<RenderLineBreak>(renderer))
|
|
downcast<RenderLineBreak>(renderer).replaceInlineBoxWrapper(downcast<LegacyInlineElementBox>(*run->box()));
|
|
// Check if we need to keep this box on the line at all.
|
|
if (inlineBoxIsRedundant)
|
|
removeInlineBox(*run, *lineBox);
|
|
}
|
|
}
|
|
|
|
static inline bool isCollapsibleSpace(UChar character, const RenderText& renderer)
|
|
{
|
|
if (character == ' ' || character == '\t' || character == softHyphen)
|
|
return true;
|
|
if (character == '\n')
|
|
return !renderer.style().preserveNewline();
|
|
if (character == noBreakSpace)
|
|
return renderer.style().nbspMode() == NBSPMode::Space;
|
|
return false;
|
|
}
|
|
|
|
template <typename CharacterType>
|
|
static inline unsigned findFirstTrailingSpace(const RenderText& lastText, const CharacterType* characters, unsigned start, unsigned stop)
|
|
{
|
|
unsigned firstSpace = stop;
|
|
while (firstSpace > start) {
|
|
UChar current = characters[firstSpace - 1];
|
|
if (!isCollapsibleSpace(current, lastText))
|
|
break;
|
|
firstSpace--;
|
|
}
|
|
|
|
return firstSpace;
|
|
}
|
|
|
|
inline BidiRun* LegacyLineLayout::handleTrailingSpaces(BidiRunList<BidiRun>& bidiRuns, BidiContext* currentContext)
|
|
{
|
|
if (!bidiRuns.runCount()
|
|
|| !bidiRuns.logicallyLastRun()->renderer().style().breakOnlyAfterWhiteSpace()
|
|
|| !bidiRuns.logicallyLastRun()->renderer().style().autoWrap())
|
|
return nullptr;
|
|
|
|
BidiRun* trailingSpaceRun = bidiRuns.logicallyLastRun();
|
|
const RenderObject& lastObject = trailingSpaceRun->renderer();
|
|
if (!is<RenderText>(lastObject))
|
|
return nullptr;
|
|
|
|
const RenderText& lastText = downcast<RenderText>(lastObject);
|
|
unsigned firstSpace;
|
|
if (lastText.text().is8Bit())
|
|
firstSpace = findFirstTrailingSpace(lastText, lastText.text().characters8(), trailingSpaceRun->start(), trailingSpaceRun->stop());
|
|
else
|
|
firstSpace = findFirstTrailingSpace(lastText, lastText.text().characters16(), trailingSpaceRun->start(), trailingSpaceRun->stop());
|
|
|
|
if (firstSpace == trailingSpaceRun->stop())
|
|
return nullptr;
|
|
|
|
TextDirection direction = style().direction();
|
|
bool shouldReorder = trailingSpaceRun != (direction == TextDirection::LTR ? bidiRuns.lastRun() : bidiRuns.firstRun());
|
|
if (firstSpace != trailingSpaceRun->start()) {
|
|
BidiContext* baseContext = currentContext;
|
|
while (BidiContext* parent = baseContext->parent())
|
|
baseContext = parent;
|
|
|
|
std::unique_ptr<BidiRun> newTrailingRun = makeUnique<BidiRun>(firstSpace, trailingSpaceRun->m_stop, trailingSpaceRun->renderer(), baseContext, U_OTHER_NEUTRAL);
|
|
trailingSpaceRun->m_stop = firstSpace;
|
|
trailingSpaceRun = newTrailingRun.get();
|
|
if (direction == TextDirection::LTR)
|
|
bidiRuns.appendRun(WTFMove(newTrailingRun));
|
|
else
|
|
bidiRuns.prependRun(WTFMove(newTrailingRun));
|
|
return trailingSpaceRun;
|
|
}
|
|
if (!shouldReorder)
|
|
return trailingSpaceRun;
|
|
|
|
if (direction == TextDirection::LTR) {
|
|
bidiRuns.moveRunToEnd(trailingSpaceRun);
|
|
trailingSpaceRun->m_level = 0;
|
|
} else {
|
|
bidiRuns.moveRunToBeginning(trailingSpaceRun);
|
|
trailingSpaceRun->m_level = 1;
|
|
}
|
|
return trailingSpaceRun;
|
|
}
|
|
|
|
void LegacyLineLayout::appendFloatingObjectToLastLine(FloatingObject& floatingObject)
|
|
{
|
|
ASSERT_WITH_SECURITY_IMPLICATION(!floatingObject.originatingLine());
|
|
ASSERT(lastRootBox());
|
|
floatingObject.setOriginatingLine(*lastRootBox());
|
|
lastRootBox()->appendFloat(floatingObject.renderer());
|
|
}
|
|
|
|
static inline void notifyResolverToResumeInIsolate(InlineBidiResolver& resolver, RenderObject* root, RenderObject* startObject)
|
|
{
|
|
if (root != startObject) {
|
|
RenderObject* parent = startObject->parent();
|
|
notifyResolverToResumeInIsolate(resolver, root, parent);
|
|
notifyObserverEnteredObject(&resolver, startObject);
|
|
}
|
|
}
|
|
|
|
static inline void setUpResolverToResumeInIsolate(InlineBidiResolver& resolver, InlineBidiResolver& topResolver, BidiRun& isolatedRun, RenderObject* root, RenderObject* startObject)
|
|
{
|
|
// Set up m_whitespaceCollapsingState
|
|
resolver.whitespaceCollapsingState() = topResolver.whitespaceCollapsingState();
|
|
resolver.whitespaceCollapsingState().setCurrentTransition(topResolver.whitespaceCollapsingTransitionForIsolatedRun(isolatedRun));
|
|
|
|
// Set up m_nestedIsolateCount
|
|
notifyResolverToResumeInIsolate(resolver, root, startObject);
|
|
}
|
|
|
|
// FIXME: BidiResolver should have this logic.
|
|
static inline void constructBidiRunsForSegment(InlineBidiResolver& topResolver, BidiRunList<BidiRun>& bidiRuns, const InlineIterator& endOfRuns, VisualDirectionOverride override, bool previousLineBrokeCleanly)
|
|
{
|
|
// FIXME: We should pass a BidiRunList into createBidiRunsForLine instead
|
|
// of the resolver owning the runs.
|
|
ASSERT(&topResolver.runs() == &bidiRuns);
|
|
ASSERT(topResolver.position() != endOfRuns);
|
|
RenderObject* currentRoot = topResolver.position().root();
|
|
topResolver.createBidiRunsForLine(endOfRuns, override, previousLineBrokeCleanly);
|
|
|
|
while (!topResolver.isolatedRuns().isEmpty()) {
|
|
// It does not matter which order we resolve the runs as long as we resolve them all.
|
|
auto isolatedRun = WTFMove(topResolver.isolatedRuns().last());
|
|
topResolver.isolatedRuns().removeLast();
|
|
currentRoot = &isolatedRun.root;
|
|
|
|
RenderObject& startObject = isolatedRun.object;
|
|
|
|
// Only inlines make sense with unicode-bidi: isolate (blocks are already isolated).
|
|
// FIXME: Because enterIsolate is not passed a RenderObject, we have to crawl up the
|
|
// tree to see which parent inline is the isolate. We could change enterIsolate
|
|
// to take a RenderObject and do this logic there, but that would be a layering
|
|
// violation for BidiResolver (which knows nothing about RenderObject).
|
|
RenderInline* isolatedInline = downcast<RenderInline>(highestContainingIsolateWithinRoot(startObject, currentRoot));
|
|
ASSERT(isolatedInline);
|
|
|
|
InlineBidiResolver isolatedResolver;
|
|
EUnicodeBidi unicodeBidi = isolatedInline->style().unicodeBidi();
|
|
TextDirection direction;
|
|
if (unicodeBidi == Plaintext)
|
|
determineDirectionality(direction, InlineIterator(isolatedInline, &isolatedRun.object, 0));
|
|
else {
|
|
ASSERT(unicodeBidi == Isolate || unicodeBidi == IsolateOverride);
|
|
direction = isolatedInline->style().direction();
|
|
}
|
|
isolatedResolver.setStatus(BidiStatus(direction, isOverride(unicodeBidi)));
|
|
|
|
setUpResolverToResumeInIsolate(isolatedResolver, topResolver, isolatedRun.runToReplace, isolatedInline, &startObject);
|
|
|
|
// The starting position is the beginning of the first run within the isolate that was identified
|
|
// during the earlier call to createBidiRunsForLine. This can be but is not necessarily the
|
|
// first run within the isolate.
|
|
InlineIterator iter = InlineIterator(isolatedInline, &startObject, isolatedRun.position);
|
|
isolatedResolver.setPositionIgnoringNestedIsolates(iter);
|
|
|
|
// We stop at the next end of line; we may re-enter this isolate in the next call to constructBidiRuns().
|
|
// FIXME: What should end and previousLineBrokeCleanly be?
|
|
// rniwa says previousLineBrokeCleanly is just a WinIE hack and could always be false here?
|
|
isolatedResolver.createBidiRunsForLine(endOfRuns, NoVisualOverride, previousLineBrokeCleanly);
|
|
// Note that we do not delete the runs from the resolver.
|
|
// We're not guaranteed to get any BidiRuns in the previous step. If we don't, we allow the placeholder
|
|
// itself to be turned into an InlineBox. We can't remove it here without potentially losing track of
|
|
// the logically last run.
|
|
if (isolatedResolver.runs().runCount())
|
|
bidiRuns.replaceRunWithRuns(&isolatedRun.runToReplace, isolatedResolver.runs());
|
|
|
|
// If we encountered any nested isolate runs, just move them
|
|
// to the top resolver's list for later processing.
|
|
while (!isolatedResolver.isolatedRuns().isEmpty()) {
|
|
auto runWithContext = WTFMove(isolatedResolver.isolatedRuns().last());
|
|
isolatedResolver.isolatedRuns().removeLast();
|
|
topResolver.setWhitespaceCollapsingTransitionForIsolatedRun(runWithContext.runToReplace, isolatedResolver.whitespaceCollapsingTransitionForIsolatedRun(runWithContext.runToReplace));
|
|
topResolver.isolatedRuns().append(WTFMove(runWithContext));
|
|
}
|
|
}
|
|
}
|
|
|
|
// This function constructs line boxes for all of the text runs in the resolver and computes their position.
|
|
LegacyRootInlineBox* LegacyLineLayout::createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>& bidiRuns, const InlineIterator& end, LineInfo& lineInfo, VerticalPositionCache& verticalPositionCache, BidiRun* trailingSpaceRun, WordMeasurements& wordMeasurements)
|
|
{
|
|
if (!bidiRuns.runCount())
|
|
return nullptr;
|
|
|
|
// FIXME: Why is this only done when we had runs?
|
|
lineInfo.setLastLine(!end.renderer());
|
|
|
|
LegacyRootInlineBox* lineBox = constructLine(bidiRuns, lineInfo);
|
|
if (!lineBox)
|
|
return nullptr;
|
|
|
|
lineBox->setBidiLevel(bidiLevel);
|
|
lineBox->setEndsWithBreak(lineInfo.previousLineBrokeCleanly());
|
|
|
|
bool isSVGRootInlineBox = is<SVGRootInlineBox>(*lineBox);
|
|
|
|
GlyphOverflowAndFallbackFontsMap textBoxDataMap;
|
|
|
|
// Now we position all of our text runs horizontally.
|
|
if (!isSVGRootInlineBox)
|
|
computeInlineDirectionPositionsForLine(lineBox, lineInfo, bidiRuns.firstRun(), trailingSpaceRun, end.atEnd(), textBoxDataMap, verticalPositionCache, wordMeasurements);
|
|
|
|
// Now position our text runs vertically.
|
|
computeBlockDirectionPositionsForLine(lineBox, bidiRuns.firstRun(), textBoxDataMap, verticalPositionCache);
|
|
|
|
// SVG text layout code computes vertical & horizontal positions on its own.
|
|
// Note that we still need to execute computeVerticalPositionsForLine() as
|
|
// it calls LegacyInlineTextBox::positionLineBox(), which tracks whether the box
|
|
// contains reversed text or not. If we wouldn't do that editing and thus
|
|
// text selection in RTL boxes would not work as expected.
|
|
if (isSVGRootInlineBox) {
|
|
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(m_flow.isSVGText());
|
|
downcast<SVGRootInlineBox>(*lineBox).computePerCharacterLayoutInformation();
|
|
}
|
|
|
|
// Compute our overflow now.
|
|
lineBox->computeOverflow(lineBox->lineTop(), lineBox->lineBottom(), textBoxDataMap);
|
|
|
|
return lineBox;
|
|
}
|
|
|
|
static void deleteLineRange(LineLayoutState& layoutState, LegacyRootInlineBox* startLine, LegacyRootInlineBox* stopLine = 0)
|
|
{
|
|
LegacyRootInlineBox* boxToDelete = startLine;
|
|
while (boxToDelete && boxToDelete != stopLine) {
|
|
layoutState.updateRepaintRangeFromBox(boxToDelete);
|
|
// Note: deleteLineRange(firstRootBox()) is not identical to deleteLineBoxTree().
|
|
// deleteLineBoxTree uses nextLineBox() instead of nextRootBox() when traversing.
|
|
LegacyRootInlineBox* next = boxToDelete->nextRootBox();
|
|
boxToDelete->deleteLine();
|
|
boxToDelete = next;
|
|
}
|
|
}
|
|
|
|
static void repaintDirtyFloats(LineLayoutState::FloatList& floats)
|
|
{
|
|
// Floats that did not have layout did not repaint when we laid them out. They would have
|
|
// painted by now if they had moved, but if they stayed at (0, 0), they still need to be
|
|
// painted.
|
|
for (auto& floatBox : floats) {
|
|
if (floatBox->everHadLayout())
|
|
continue;
|
|
auto& box = floatBox->renderer();
|
|
if (!box.x() && !box.y() && box.checkForRepaintDuringLayout())
|
|
box.repaint();
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::layoutRunsAndFloats(LineLayoutState& layoutState, bool hasInlineChild)
|
|
{
|
|
// We want to skip ahead to the first dirty line
|
|
InlineBidiResolver resolver;
|
|
LegacyRootInlineBox* startLine = determineStartPosition(layoutState, resolver);
|
|
|
|
unsigned consecutiveHyphenatedLines = 0;
|
|
if (startLine) {
|
|
for (auto* line = startLine->prevRootBox(); line && line->isHyphenated(); line = line->prevRootBox())
|
|
consecutiveHyphenatedLines++;
|
|
}
|
|
|
|
// FIXME: This would make more sense outside of this function, but since
|
|
// determineStartPosition can change the fullLayout flag we have to do this here. Failure to call
|
|
// determineStartPosition first will break fast/repaint/line-flow-with-floats-9.html.
|
|
if (layoutState.isFullLayout() && hasInlineChild && !m_flow.selfNeedsLayout()) {
|
|
m_flow.setNeedsLayout(MarkOnlyThis); // Mark as needing a full layout to force us to repaint.
|
|
if (!layoutContext().needsFullRepaint() && m_flow.layerRepaintRects()) {
|
|
// Because we waited until we were already inside layout to discover
|
|
// that the block really needed a full layout, we missed our chance to repaint the layer
|
|
// before layout started. Luckily the layer has cached the repaint rect for its original
|
|
// position and size, and so we can use that to make a repaint happen now.
|
|
m_flow.repaintUsingContainer(m_flow.containerForRepaint(), m_flow.layerRepaintRects()->clippedOverflowRect);
|
|
}
|
|
}
|
|
|
|
if (m_flow.containsFloats())
|
|
layoutState.floatList().setLastFloat(m_flow.floatingObjects()->set().last().get());
|
|
|
|
// We also find the first clean line and extract these lines. We will add them back
|
|
// if we determine that we're able to synchronize after handling all our dirty lines.
|
|
InlineIterator cleanLineStart;
|
|
BidiStatus cleanLineBidiStatus;
|
|
if (!layoutState.isFullLayout() && startLine)
|
|
determineEndPosition(layoutState, startLine, cleanLineStart, cleanLineBidiStatus);
|
|
|
|
if (startLine) {
|
|
if (!layoutState.usesRepaintBounds())
|
|
layoutState.setRepaintRange(m_flow.logicalHeight());
|
|
deleteLineRange(layoutState, startLine);
|
|
}
|
|
|
|
if (!layoutState.isFullLayout() && lastRootBox() && lastRootBox()->endsWithBreak()) {
|
|
// If the last line before the start line ends with a line break that clear floats,
|
|
// adjust the height accordingly.
|
|
// A line break can be either the first or the last object on a line, depending on its direction.
|
|
if (LegacyInlineBox* lastLeafDescendant = lastRootBox()->lastLeafDescendant()) {
|
|
RenderObject* lastObject = &lastLeafDescendant->renderer();
|
|
if (!lastObject->isBR())
|
|
lastObject = &lastRootBox()->firstLeafDescendant()->renderer();
|
|
if (lastObject->isBR()) {
|
|
auto clear = RenderStyle::usedClear(*lastObject);
|
|
if (clear != UsedClear::None)
|
|
m_flow.clearFloats(clear);
|
|
}
|
|
}
|
|
}
|
|
|
|
layoutRunsAndFloatsInRange(layoutState, resolver, cleanLineStart, cleanLineBidiStatus, consecutiveHyphenatedLines);
|
|
linkToEndLineIfNeeded(layoutState);
|
|
repaintDirtyFloats(layoutState.floatList());
|
|
}
|
|
|
|
// Before restarting the layout loop with a new logicalHeight, remove all floats that were added and reset the resolver.
|
|
inline const InlineIterator& LegacyLineLayout::restartLayoutRunsAndFloatsInRange(LayoutUnit oldLogicalHeight, LayoutUnit newLogicalHeight, FloatingObject* lastFloatFromPreviousLine, InlineBidiResolver& resolver, const InlineIterator& oldEnd)
|
|
{
|
|
m_flow.removeFloatingObjectsBelow(lastFloatFromPreviousLine, oldLogicalHeight);
|
|
m_flow.setLogicalHeight(newLogicalHeight);
|
|
resolver.setPositionIgnoringNestedIsolates(oldEnd);
|
|
return oldEnd;
|
|
}
|
|
|
|
void LegacyLineLayout::layoutRunsAndFloatsInRange(LineLayoutState& layoutState, InlineBidiResolver& resolver, const InlineIterator& cleanLineStart, const BidiStatus& cleanLineBidiStatus, unsigned consecutiveHyphenatedLines)
|
|
{
|
|
const RenderStyle& styleToUse = style();
|
|
bool paginated = layoutContext().layoutState() && layoutContext().layoutState()->isPaginated();
|
|
LineWhitespaceCollapsingState& lineWhitespaceCollapsingState = resolver.whitespaceCollapsingState();
|
|
InlineIterator end = resolver.position();
|
|
bool checkForEndLineMatch = layoutState.endLine();
|
|
RenderTextInfo renderTextInfo;
|
|
VerticalPositionCache verticalPositionCache;
|
|
|
|
LineBreaker lineBreaker(m_flow);
|
|
|
|
while (!end.atEnd()) {
|
|
// FIXME: Is this check necessary before the first iteration or can it be moved to the end?
|
|
if (checkForEndLineMatch) {
|
|
layoutState.setEndLineMatched(matchedEndLine(layoutState, resolver, cleanLineStart, cleanLineBidiStatus));
|
|
if (layoutState.endLineMatched()) {
|
|
resolver.setPosition(InlineIterator(resolver.position().root(), 0, 0), 0);
|
|
layoutState.marginInfo().clearMargin();
|
|
break;
|
|
}
|
|
}
|
|
|
|
lineWhitespaceCollapsingState.reset();
|
|
|
|
layoutState.lineInfo().setEmpty(true);
|
|
layoutState.lineInfo().resetRunsFromLeadingWhitespace();
|
|
|
|
const InlineIterator oldEnd = end;
|
|
bool isNewUBAParagraph = layoutState.lineInfo().previousLineBrokeCleanly();
|
|
FloatingObject* lastFloatFromPreviousLine = (m_flow.containsFloats()) ? m_flow.floatingObjects()->set().last().get() : nullptr;
|
|
|
|
WordMeasurements wordMeasurements;
|
|
end = lineBreaker.nextLineBreak(resolver, layoutState.lineInfo(), renderTextInfo, lastFloatFromPreviousLine, consecutiveHyphenatedLines, wordMeasurements);
|
|
m_flow.cachePriorCharactersIfNeeded(renderTextInfo.lineBreakIterator);
|
|
renderTextInfo.lineBreakIterator.resetPriorContext();
|
|
if (resolver.position().atEnd()) {
|
|
// FIXME: We shouldn't be creating any runs in nextLineBreak to begin with!
|
|
// Once BidiRunList is separated from BidiResolver this will not be needed.
|
|
resolver.runs().clear();
|
|
resolver.markCurrentRunEmpty(); // FIXME: This can probably be replaced by an ASSERT (or just removed).
|
|
layoutState.setCheckForFloatsFromLastLine(true);
|
|
resolver.setPosition(InlineIterator(resolver.position().root(), 0, 0), 0);
|
|
break;
|
|
}
|
|
|
|
ASSERT(end != resolver.position());
|
|
|
|
// This is a short-cut for empty lines.
|
|
if (layoutState.lineInfo().isEmpty()) {
|
|
if (lastRootBox())
|
|
lastRootBox()->setLineBreakInfo(end.renderer(), end.offset(), resolver.status());
|
|
} else {
|
|
VisualDirectionOverride override = (styleToUse.rtlOrdering() == Order::Visual ? (styleToUse.direction() == TextDirection::LTR ? VisualLeftToRightOverride : VisualRightToLeftOverride) : NoVisualOverride);
|
|
|
|
if (isNewUBAParagraph && styleToUse.unicodeBidi() == Plaintext && !resolver.context()->parent()) {
|
|
TextDirection direction = styleToUse.direction();
|
|
determineDirectionality(direction, resolver.position());
|
|
resolver.setStatus(BidiStatus(direction, isOverride(styleToUse.unicodeBidi())));
|
|
}
|
|
// FIXME: This ownership is reversed. We should own the BidiRunList and pass it to createBidiRunsForLine.
|
|
BidiRunList<BidiRun>& bidiRuns = resolver.runs();
|
|
constructBidiRunsForSegment(resolver, bidiRuns, end, override, layoutState.lineInfo().previousLineBrokeCleanly());
|
|
ASSERT(resolver.position() == end);
|
|
|
|
BidiRun* trailingSpaceRun = !layoutState.lineInfo().previousLineBrokeCleanly() ? handleTrailingSpaces(bidiRuns, resolver.context()) : nullptr;
|
|
|
|
if (bidiRuns.runCount() && lineBreaker.lineWasHyphenated()) {
|
|
bidiRuns.logicallyLastRun()->m_hasHyphen = true;
|
|
consecutiveHyphenatedLines++;
|
|
} else
|
|
consecutiveHyphenatedLines = 0;
|
|
|
|
// Now that the runs have been ordered, we create the line boxes.
|
|
// At the same time we figure out where border/padding/margin should be applied for
|
|
// inline flow boxes.
|
|
|
|
LayoutUnit oldLogicalHeight = m_flow.logicalHeight();
|
|
LegacyRootInlineBox* lineBox = createLineBoxesFromBidiRuns(resolver.status().context->level(), bidiRuns, end, layoutState.lineInfo(), verticalPositionCache, trailingSpaceRun, wordMeasurements);
|
|
|
|
bidiRuns.clear();
|
|
resolver.markCurrentRunEmpty(); // FIXME: This can probably be replaced by an ASSERT (or just removed).
|
|
|
|
if (lineBox) {
|
|
lineBox->setLineBreakInfo(end.renderer(), end.offset(), resolver.status());
|
|
if (layoutState.usesRepaintBounds())
|
|
layoutState.updateRepaintRangeFromBox(lineBox);
|
|
|
|
LayoutUnit adjustment;
|
|
bool overflowsFragment = false;
|
|
|
|
layoutState.marginInfo().setAtBeforeSideOfBlock(false);
|
|
|
|
if (paginated)
|
|
m_flow.adjustLinePositionForPagination(lineBox, adjustment, overflowsFragment, layoutState.fragmentedFlow());
|
|
if (adjustment) {
|
|
IndentTextOrNot shouldIndentText = layoutState.lineInfo().isFirstLine() ? IndentText : DoNotIndentText;
|
|
LayoutUnit oldLineWidth = m_flow.availableLogicalWidthForLine(oldLogicalHeight, shouldIndentText);
|
|
lineBox->adjustBlockDirectionPosition(adjustment);
|
|
if (layoutState.usesRepaintBounds())
|
|
layoutState.updateRepaintRangeFromBox(lineBox);
|
|
|
|
if (m_flow.availableLogicalWidthForLine(oldLogicalHeight + adjustment, shouldIndentText) != oldLineWidth) {
|
|
// We have to delete this line, remove all floats that got added, and let line layout re-run.
|
|
lineBox->deleteLine();
|
|
end = restartLayoutRunsAndFloatsInRange(oldLogicalHeight, oldLogicalHeight + adjustment, lastFloatFromPreviousLine, resolver, oldEnd);
|
|
continue;
|
|
}
|
|
|
|
m_flow.setLogicalHeight(lineBox->lineBoxBottom());
|
|
}
|
|
|
|
if (paginated) {
|
|
if (layoutState.fragmentedFlow())
|
|
updateFragmentForLine(lineBox);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (size_t i = 0; i < lineBreaker.positionedObjects().size(); ++i)
|
|
setStaticPositions(m_flow, *lineBreaker.positionedObjects()[i], DoNotIndentText);
|
|
|
|
if (!layoutState.lineInfo().isEmpty()) {
|
|
layoutState.lineInfo().setFirstLine(false);
|
|
m_flow.clearFloats(lineBreaker.usedClear());
|
|
}
|
|
|
|
if (m_flow.floatingObjects() && lastRootBox()) {
|
|
const FloatingObjectSet& floatingObjectSet = m_flow.floatingObjects()->set();
|
|
auto it = floatingObjectSet.begin();
|
|
auto end = floatingObjectSet.end();
|
|
if (auto* lastFloat = layoutState.floatList().lastFloat()) {
|
|
auto lastFloatIterator = floatingObjectSet.find(lastFloat);
|
|
ASSERT(lastFloatIterator != end);
|
|
++lastFloatIterator;
|
|
it = lastFloatIterator;
|
|
}
|
|
for (; it != end; ++it) {
|
|
auto& floatingObject = *it;
|
|
appendFloatingObjectToLastLine(*floatingObject);
|
|
// If a float's geometry has changed, give up on syncing with clean lines.
|
|
auto* floatWithRect = layoutState.floatList().floatWithRect(floatingObject->renderer());
|
|
if (!floatWithRect || floatWithRect->rect() != floatingObject->frameRect())
|
|
checkForEndLineMatch = false;
|
|
}
|
|
layoutState.floatList().setLastFloat(!floatingObjectSet.isEmpty() ? floatingObjectSet.last().get() : nullptr);
|
|
}
|
|
|
|
lineWhitespaceCollapsingState.reset();
|
|
resolver.setPosition(end, numberOfIsolateAncestors(end));
|
|
}
|
|
|
|
// In case we already adjusted the line positions during this layout to avoid widows
|
|
// then we need to ignore the possibility of having a new widows situation.
|
|
// Otherwise, we risk leaving empty containers which is against the block fragmentation principles.
|
|
if (paginated && !style().hasAutoWidows() && !m_flow.didBreakAtLineToAvoidWidow()) {
|
|
// Check the line boxes to make sure we didn't create unacceptable widows.
|
|
// However, we'll prioritize orphans - so nothing we do here should create
|
|
// a new orphan.
|
|
|
|
LegacyRootInlineBox* lineBox = lastRootBox();
|
|
|
|
// Count from the end of the block backwards, to see how many hanging
|
|
// lines we have.
|
|
LegacyRootInlineBox* firstLineInBlock = firstRootBox();
|
|
int numLinesHanging = 1;
|
|
while (lineBox && lineBox != firstLineInBlock && !lineBox->isFirstAfterPageBreak()) {
|
|
++numLinesHanging;
|
|
lineBox = lineBox->prevRootBox();
|
|
}
|
|
|
|
// If there were no breaks in the block, we didn't create any widows.
|
|
if (!lineBox || !lineBox->isFirstAfterPageBreak() || lineBox == firstLineInBlock) {
|
|
if (m_flow.shouldBreakAtLineToAvoidWidow()) {
|
|
// This is the case when the previous line layout marks a line to break at to avoid widows
|
|
// but the current layout does not produce that line. It happens when layout constraints unexpectedly
|
|
// change in between layouts (note that these paginated line layouts run within the same layout frame
|
|
// as opposed to two subsequent full layouts).
|
|
ASSERT_NOT_REACHED();
|
|
m_flow.clearShouldBreakAtLineToAvoidWidow();
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (numLinesHanging < style().widows()) {
|
|
// We have detected a widow. Now we need to work out how many
|
|
// lines there are on the previous page, and how many we need
|
|
// to steal.
|
|
int numLinesNeeded = style().widows() - numLinesHanging;
|
|
LegacyRootInlineBox* currentFirstLineOfNewPage = lineBox;
|
|
|
|
// Count the number of lines in the previous page.
|
|
lineBox = lineBox->prevRootBox();
|
|
int numLinesInPreviousPage = 1;
|
|
while (lineBox && lineBox != firstLineInBlock && !lineBox->isFirstAfterPageBreak()) {
|
|
++numLinesInPreviousPage;
|
|
lineBox = lineBox->prevRootBox();
|
|
}
|
|
|
|
// If there was an explicit value for orphans, respect that. If not, we still
|
|
// shouldn't create a situation where we make an orphan bigger than the initial value.
|
|
// This means that setting widows implies we also care about orphans, but given
|
|
// the specification says the initial orphan value is non-zero, this is ok. The
|
|
// author is always free to set orphans explicitly as well.
|
|
int orphans = style().hasAutoOrphans() ? style().initialOrphans() : style().orphans();
|
|
int numLinesAvailable = numLinesInPreviousPage - orphans;
|
|
if (numLinesAvailable <= 0)
|
|
return;
|
|
|
|
int numLinesToTake = std::min(numLinesAvailable, numLinesNeeded);
|
|
// Wind back from our first widowed line.
|
|
lineBox = currentFirstLineOfNewPage;
|
|
for (int i = 0; i < numLinesToTake; ++i)
|
|
lineBox = lineBox->prevRootBox();
|
|
|
|
// We now want to break at this line. Remember for next layout and trigger relayout.
|
|
m_flow.setBreakAtLineToAvoidWidow(lineCountUntil(lineBox));
|
|
m_flow.markLinesDirtyInBlockRange(lastRootBox()->lineBoxBottom(), lineBox->lineBoxBottom(), lineBox);
|
|
}
|
|
}
|
|
m_flow.clearDidBreakAtLineToAvoidWidow();
|
|
}
|
|
|
|
void LegacyLineLayout::reattachCleanLineFloats(LegacyRootInlineBox& cleanLine, LayoutUnit delta, bool isFirstCleanLine)
|
|
{
|
|
auto* cleanLineFloats = cleanLine.floatsPtr();
|
|
if (!cleanLineFloats)
|
|
return;
|
|
|
|
for (auto& floatingBox : *cleanLineFloats) {
|
|
if (!floatingBox)
|
|
continue;
|
|
auto* floatingObject = m_flow.insertFloatingObject(*floatingBox);
|
|
if (isFirstCleanLine && floatingObject->originatingLine()) {
|
|
// Float box does not belong to this line anymore.
|
|
ASSERT_WITH_SECURITY_IMPLICATION(cleanLine.prevRootBox() == floatingObject->originatingLine());
|
|
cleanLine.removeFloat(*floatingBox);
|
|
continue;
|
|
}
|
|
ASSERT_WITH_SECURITY_IMPLICATION(!floatingObject->originatingLine());
|
|
floatingObject->setOriginatingLine(cleanLine);
|
|
m_flow.setLogicalHeight(m_flow.logicalTopForChild(*floatingBox) - m_flow.marginBeforeForChild(*floatingBox) + delta);
|
|
m_flow.positionNewFloats();
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::linkToEndLineIfNeeded(LineLayoutState& layoutState)
|
|
{
|
|
auto* firstCleanLine = layoutState.endLine();
|
|
if (firstCleanLine) {
|
|
if (layoutState.endLineMatched()) {
|
|
bool paginated = layoutContext().layoutState() && layoutContext().layoutState()->isPaginated();
|
|
// Attach all the remaining lines, and then adjust their y-positions as needed.
|
|
LayoutUnit delta = m_flow.logicalHeight() - layoutState.endLineLogicalTop();
|
|
for (auto* line = firstCleanLine; line; line = line->nextRootBox()) {
|
|
line->attachLine();
|
|
if (paginated) {
|
|
delta -= line->paginationStrut();
|
|
bool overflowsFragment;
|
|
m_flow.adjustLinePositionForPagination(line, delta, overflowsFragment, layoutState.fragmentedFlow());
|
|
}
|
|
if (delta) {
|
|
layoutState.updateRepaintRangeFromBox(line, delta);
|
|
line->adjustBlockDirectionPosition(delta);
|
|
}
|
|
if (layoutState.fragmentedFlow())
|
|
updateFragmentForLine(line);
|
|
reattachCleanLineFloats(*line, delta, line == firstCleanLine);
|
|
}
|
|
m_flow.setLogicalHeight(lastRootBox()->lineBoxBottom());
|
|
} else {
|
|
// Delete all the remaining lines.
|
|
deleteLineRange(layoutState, layoutState.endLine());
|
|
}
|
|
}
|
|
|
|
if (m_flow.floatingObjects() && (layoutState.checkForFloatsFromLastLine() || m_flow.positionNewFloats()) && lastRootBox()) {
|
|
// In case we have a float on the last line, it might not be positioned up to now.
|
|
// This has to be done before adding in the bottom border/padding, or the float will
|
|
// include the padding incorrectly. -dwh
|
|
if (layoutState.checkForFloatsFromLastLine()) {
|
|
LayoutUnit bottomVisualOverflow = lastRootBox()->logicalBottomVisualOverflow();
|
|
LayoutUnit bottomLayoutOverflow = lastRootBox()->logicalBottomLayoutOverflow();
|
|
auto newLineBox = makeUnique<LegacyRootInlineBox>(m_flow);
|
|
newLineBox->setIsForTrailingFloats();
|
|
auto trailingFloatsLineBox = newLineBox.get();
|
|
m_lineBoxes.appendLineBox(WTFMove(newLineBox));
|
|
trailingFloatsLineBox->setConstructed();
|
|
GlyphOverflowAndFallbackFontsMap textBoxDataMap;
|
|
VerticalPositionCache verticalPositionCache;
|
|
LayoutUnit blockLogicalHeight = m_flow.logicalHeight();
|
|
trailingFloatsLineBox->alignBoxesInBlockDirection(blockLogicalHeight, textBoxDataMap, verticalPositionCache);
|
|
trailingFloatsLineBox->setLineTopBottomPositions(blockLogicalHeight, blockLogicalHeight, blockLogicalHeight, blockLogicalHeight);
|
|
trailingFloatsLineBox->setPaginatedLineWidth(m_flow.availableLogicalWidthForContent(blockLogicalHeight));
|
|
LayoutRect logicalLayoutOverflow(0_lu, blockLogicalHeight, 1_lu, bottomLayoutOverflow - blockLogicalHeight);
|
|
LayoutRect logicalVisualOverflow(0_lu, blockLogicalHeight, 1_lu, bottomVisualOverflow - blockLogicalHeight);
|
|
trailingFloatsLineBox->setOverflowFromLogicalRects(logicalLayoutOverflow, logicalVisualOverflow, trailingFloatsLineBox->lineTop(), trailingFloatsLineBox->lineBottom());
|
|
if (layoutState.fragmentedFlow())
|
|
updateFragmentForLine(trailingFloatsLineBox);
|
|
}
|
|
|
|
const FloatingObjectSet& floatingObjectSet = m_flow.floatingObjects()->set();
|
|
auto it = floatingObjectSet.begin();
|
|
auto end = floatingObjectSet.end();
|
|
if (auto* lastFloat = layoutState.floatList().lastFloat()) {
|
|
auto lastFloatIterator = floatingObjectSet.find(lastFloat);
|
|
ASSERT(lastFloatIterator != end);
|
|
++lastFloatIterator;
|
|
it = lastFloatIterator;
|
|
}
|
|
for (; it != end; ++it)
|
|
appendFloatingObjectToLastLine(**it);
|
|
layoutState.floatList().setLastFloat(!floatingObjectSet.isEmpty() ? floatingObjectSet.last().get() : nullptr);
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::layoutLineBoxes(bool relayoutChildren, LayoutUnit& repaintLogicalTop, LayoutUnit& repaintLogicalBottom)
|
|
{
|
|
m_flow.setLogicalHeight(m_flow.borderAndPaddingBefore());
|
|
|
|
// Lay out our hypothetical grid line as though it occurs at the top of the block.
|
|
if (layoutContext().layoutState() && layoutContext().layoutState()->lineGrid() == &m_flow)
|
|
m_flow.layoutLineGridBox();
|
|
|
|
RenderFragmentedFlow* fragmentedFlow = m_flow.enclosingFragmentedFlow();
|
|
bool clearLinesForPagination = firstRootBox() && fragmentedFlow && !fragmentedFlow->hasFragments();
|
|
|
|
// Figure out if we should clear out our line boxes.
|
|
// FIXME: Handle resize eventually!
|
|
bool isFullLayout = !firstRootBox() || m_flow.selfNeedsLayout() || relayoutChildren || clearLinesForPagination;
|
|
LineLayoutState layoutState(m_flow, isFullLayout, repaintLogicalTop, repaintLogicalBottom, fragmentedFlow);
|
|
|
|
if (isFullLayout)
|
|
lineBoxes().deleteLineBoxes();
|
|
|
|
// Text truncation kicks in in two cases:
|
|
// 1) If your overflow isn't visible and your text-overflow-mode isn't clip.
|
|
// 2) If you're an anonymous block with a block parent that satisfies #1.
|
|
// FIXME: CSS3 says that descendants that are clipped must also know how to truncate. This is insanely
|
|
// difficult to figure out in general (especially in the middle of doing layout), so we only handle the
|
|
// simple case of an anonymous block truncating when it's parent is clipped.
|
|
auto* parent = m_flow.parent();
|
|
bool hasTextOverflow = (style().textOverflow() == TextOverflow::Ellipsis && m_flow.hasNonVisibleOverflow())
|
|
|| (m_flow.isAnonymousBlock() && parent && parent->isRenderBlock() && parent->style().textOverflow() == TextOverflow::Ellipsis && parent->hasNonVisibleOverflow());
|
|
|
|
// Walk all the lines and delete our ellipsis line boxes if they exist.
|
|
if (hasTextOverflow)
|
|
deleteEllipsisLineBoxes();
|
|
|
|
if (m_flow.firstChild()) {
|
|
// In full layout mode, clear the line boxes of children upfront. Otherwise,
|
|
// siblings can run into stale root lineboxes during layout. Then layout
|
|
// the replaced elements later. In partial layout mode, line boxes are not
|
|
// deleted and only dirtied. In that case, we can layout the replaced
|
|
// elements at the same time.
|
|
bool hasInlineChild = false;
|
|
Vector<RenderBox*> replacedChildren;
|
|
for (InlineWalker walker(m_flow); !walker.atEnd(); walker.advance()) {
|
|
RenderObject& o = *walker.current();
|
|
|
|
if (!hasInlineChild && o.isInline())
|
|
hasInlineChild = true;
|
|
|
|
if (o.isReplaced() || o.isFloating() || o.isOutOfFlowPositioned()) {
|
|
RenderBox& box = downcast<RenderBox>(o);
|
|
|
|
if (relayoutChildren || box.hasRelativeDimensions())
|
|
box.setChildNeedsLayout(MarkOnlyThis);
|
|
|
|
// If relayoutChildren is set and the child has percentage padding or an embedded content box, we also need to invalidate the childs pref widths.
|
|
if (relayoutChildren && box.needsPreferredWidthsRecalculation())
|
|
box.setPreferredLogicalWidthsDirty(true, MarkOnlyThis);
|
|
|
|
if (box.isOutOfFlowPositioned())
|
|
box.containingBlock()->insertPositionedObject(box);
|
|
else if (box.isFloating())
|
|
layoutState.floatList().append(FloatWithRect::create(box));
|
|
else if (isFullLayout || box.needsLayout()) {
|
|
// Replaced element.
|
|
if (isFullLayout && is<RenderRubyRun>(box)) {
|
|
// FIXME: This resets the overhanging margins that we set during line layout (see computeInlineDirectionPositionsForSegment)
|
|
// Find a more suitable place for this.
|
|
m_flow.setMarginStartForChild(box, 0);
|
|
m_flow.setMarginEndForChild(box, 0);
|
|
}
|
|
box.dirtyLineBoxes(isFullLayout);
|
|
if (isFullLayout)
|
|
replacedChildren.append(&box);
|
|
else
|
|
box.layoutIfNeeded();
|
|
}
|
|
} else if (o.isTextOrLineBreak() || (is<RenderInline>(o) && !walker.atEndOfInline())) {
|
|
if (is<RenderInline>(o))
|
|
downcast<RenderInline>(o).updateAlwaysCreateLineBoxes(layoutState.isFullLayout());
|
|
if (layoutState.isFullLayout() || o.selfNeedsLayout())
|
|
dirtyLineBoxesForRenderer(o, layoutState.isFullLayout());
|
|
o.clearNeedsLayout();
|
|
}
|
|
}
|
|
|
|
for (size_t i = 0; i < replacedChildren.size(); i++)
|
|
replacedChildren[i]->layoutIfNeeded();
|
|
|
|
layoutRunsAndFloats(layoutState, hasInlineChild);
|
|
}
|
|
|
|
// Expand the last line to accommodate Ruby and emphasis marks.
|
|
int lastLineAnnotationsAdjustment = 0;
|
|
if (lastRootBox()) {
|
|
LayoutUnit lowestAllowedPosition = std::max(lastRootBox()->lineBottom(), m_flow.logicalHeight() + m_flow.paddingAfter());
|
|
if (!style().isFlippedLinesWritingMode())
|
|
lastLineAnnotationsAdjustment = lastRootBox()->computeUnderAnnotationAdjustment(lowestAllowedPosition);
|
|
else
|
|
lastLineAnnotationsAdjustment = lastRootBox()->computeOverAnnotationAdjustment(lowestAllowedPosition);
|
|
}
|
|
|
|
// Now do the handling of the bottom of the block, adding in our bottom border/padding and
|
|
// determining the correct collapsed bottom margin information. This collapse is only necessary
|
|
// if our last child was an anonymous inline block that might need to propagate margin information out to
|
|
// us.
|
|
LayoutUnit afterEdge = m_flow.borderAndPaddingAfter() + m_flow.scrollbarLogicalHeight() + lastLineAnnotationsAdjustment;
|
|
m_flow.setLogicalHeight(m_flow.logicalHeight() + afterEdge);
|
|
|
|
if (!firstRootBox() && m_flow.hasLineIfEmpty())
|
|
m_flow.setLogicalHeight(m_flow.logicalHeight() + m_flow.lineHeight(true, m_flow.isHorizontalWritingMode() ? HorizontalLine : VerticalLine, PositionOfInteriorLineBoxes));
|
|
|
|
// See if we have any lines that spill out of our block. If we do, then we will possibly need to
|
|
// truncate text.
|
|
if (hasTextOverflow)
|
|
checkLinesForTextOverflow();
|
|
}
|
|
|
|
void LegacyLineLayout::checkFloatInCleanLine(LegacyRootInlineBox& cleanLine, RenderBox& floatBoxOnCleanLine, FloatWithRect& matchingFloatWithRect,
|
|
bool& encounteredNewFloat, bool& dirtiedByFloat)
|
|
{
|
|
ASSERT_WITH_SECURITY_IMPLICATION(!floatBoxOnCleanLine.style().deletionHasBegun());
|
|
if (&matchingFloatWithRect.renderer() != &floatBoxOnCleanLine) {
|
|
encounteredNewFloat = true;
|
|
return;
|
|
}
|
|
floatBoxOnCleanLine.layoutIfNeeded();
|
|
LayoutRect originalFloatRect = matchingFloatWithRect.rect();
|
|
LayoutSize newSize(
|
|
floatBoxOnCleanLine.width() + floatBoxOnCleanLine.horizontalMarginExtent(),
|
|
floatBoxOnCleanLine.height() + floatBoxOnCleanLine.verticalMarginExtent());
|
|
|
|
// We have to reset the cap-height alignment done by the first-letter floats when initial-letter is set, so just always treat first-letter floats as dirty.
|
|
if (originalFloatRect.size() == newSize && (floatBoxOnCleanLine.style().styleType() != PseudoId::FirstLetter || !floatBoxOnCleanLine.style().initialLetterDrop()))
|
|
return;
|
|
|
|
LayoutUnit floatTop = m_flow.isHorizontalWritingMode() ? originalFloatRect.y() : originalFloatRect.x();
|
|
LayoutUnit floatHeight = m_flow.isHorizontalWritingMode() ? std::max(originalFloatRect.height(), newSize.height())
|
|
: std::max(originalFloatRect.width(), newSize.width());
|
|
floatHeight = std::min(floatHeight, LayoutUnit::max() - floatTop);
|
|
cleanLine.markDirty();
|
|
m_flow.markLinesDirtyInBlockRange(cleanLine.lineBoxBottom(), floatTop + floatHeight, &cleanLine);
|
|
LayoutRect newFloatRect = originalFloatRect;
|
|
newFloatRect.setSize(newSize);
|
|
matchingFloatWithRect.adjustRect(newFloatRect);
|
|
dirtiedByFloat = true;
|
|
}
|
|
|
|
LegacyRootInlineBox* LegacyLineLayout::determineStartPosition(LineLayoutState& layoutState, InlineBidiResolver& resolver)
|
|
{
|
|
LegacyRootInlineBox* currentLine = nullptr;
|
|
LegacyRootInlineBox* lastLine = nullptr;
|
|
|
|
// FIXME: This entire float-checking block needs to be broken into a new function.
|
|
auto& floats = layoutState.floatList();
|
|
bool dirtiedByFloat = false;
|
|
if (!layoutState.isFullLayout()) {
|
|
// Paginate all of the clean lines.
|
|
bool paginated = layoutContext().layoutState() && layoutContext().layoutState()->isPaginated();
|
|
LayoutUnit paginationDelta;
|
|
auto floatsIterator = floats.begin();
|
|
auto end = floats.end();
|
|
for (currentLine = firstRootBox(); currentLine && !currentLine->isDirty(); currentLine = currentLine->nextRootBox()) {
|
|
if (paginated) {
|
|
if (lineWidthForPaginatedLineChanged(currentLine, 0, layoutState.fragmentedFlow())) {
|
|
currentLine->markDirty();
|
|
break;
|
|
}
|
|
paginationDelta -= currentLine->paginationStrut();
|
|
bool overflowsFragment;
|
|
m_flow.adjustLinePositionForPagination(currentLine, paginationDelta, overflowsFragment, layoutState.fragmentedFlow());
|
|
if (paginationDelta) {
|
|
if (m_flow.containsFloats() || !floats.isEmpty()) {
|
|
// FIXME: Do better eventually. For now if we ever shift because of pagination and floats are present just go to a full layout.
|
|
layoutState.markForFullLayout();
|
|
break;
|
|
}
|
|
|
|
layoutState.updateRepaintRangeFromBox(currentLine, paginationDelta);
|
|
currentLine->adjustBlockDirectionPosition(paginationDelta);
|
|
}
|
|
if (layoutState.fragmentedFlow())
|
|
updateFragmentForLine(currentLine);
|
|
}
|
|
|
|
if (auto* cleanLineFloats = currentLine->floatsPtr()) {
|
|
// If a new float has been inserted before this line or before its last known float, just do a full layout.
|
|
bool encounteredNewFloat = false;
|
|
for (auto& floatBoxOnCleanLine : *cleanLineFloats) {
|
|
ASSERT(floatsIterator != end);
|
|
if (!floatBoxOnCleanLine)
|
|
continue;
|
|
checkFloatInCleanLine(*currentLine, *floatBoxOnCleanLine, *floatsIterator, encounteredNewFloat, dirtiedByFloat);
|
|
++floatsIterator;
|
|
if (floatsIterator == end || encounteredNewFloat) {
|
|
layoutState.markForFullLayout();
|
|
break;
|
|
}
|
|
}
|
|
if (dirtiedByFloat || encounteredNewFloat)
|
|
break;
|
|
}
|
|
}
|
|
// Check if a new float has been inserted after the last known float.
|
|
if (floatsIterator != end) {
|
|
if (!currentLine)
|
|
layoutState.markForFullLayout();
|
|
else {
|
|
for (; floatsIterator != end; ++floatsIterator) {
|
|
auto& floatWithRect = *floatsIterator;
|
|
if (!floatWithRect->renderer().needsLayout())
|
|
continue;
|
|
layoutState.markForFullLayout();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (layoutState.isFullLayout()) {
|
|
m_lineBoxes.deleteLineBoxTree();
|
|
currentLine = nullptr;
|
|
ASSERT(!firstRootBox() && !lastRootBox());
|
|
} else {
|
|
if (currentLine) {
|
|
// We have a dirty line.
|
|
if (LegacyRootInlineBox* prevRootBox = currentLine->prevRootBox()) {
|
|
// We have a previous line.
|
|
if (!dirtiedByFloat && (!prevRootBox->endsWithBreak()
|
|
|| !prevRootBox->lineBreakObj()
|
|
|| (is<RenderText>(*prevRootBox->lineBreakObj())
|
|
&& prevRootBox->lineBreakPos() >= downcast<RenderText>(*prevRootBox->lineBreakObj()).text().length()))) {
|
|
// The previous line didn't break cleanly or broke at a newline
|
|
// that has been deleted, so treat it as dirty too.
|
|
currentLine = prevRootBox;
|
|
}
|
|
}
|
|
}
|
|
// If we have no dirty lines, then last is just the last root box.
|
|
lastLine = currentLine ? currentLine->prevRootBox() : lastRootBox();
|
|
}
|
|
|
|
if (!floats.isEmpty()) {
|
|
LayoutUnit savedLogicalHeight = m_flow.logicalHeight();
|
|
// Restore floats from clean lines.
|
|
LegacyRootInlineBox* line = firstRootBox();
|
|
while (line != currentLine) {
|
|
if (auto* cleanLineFloats = line->floatsPtr()) {
|
|
for (auto& floatingBox : *cleanLineFloats) {
|
|
if (!floatingBox)
|
|
continue;
|
|
auto* floatingObject = m_flow.insertFloatingObject(*floatingBox);
|
|
ASSERT_WITH_SECURITY_IMPLICATION(!floatingObject->originatingLine());
|
|
floatingObject->setOriginatingLine(*line);
|
|
m_flow.setLogicalHeight(m_flow.logicalTopForChild(*floatingBox) - m_flow.marginBeforeForChild(*floatingBox));
|
|
m_flow.positionNewFloats();
|
|
floats.setLastCleanFloat(*floatingBox);
|
|
}
|
|
}
|
|
line = line->nextRootBox();
|
|
}
|
|
m_flow.setLogicalHeight(savedLogicalHeight);
|
|
}
|
|
|
|
layoutState.lineInfo().setFirstLine(!lastLine);
|
|
layoutState.lineInfo().setPreviousLineBrokeCleanly(!lastLine || lastLine->endsWithBreak());
|
|
|
|
if (lastLine) {
|
|
m_flow.setLogicalHeight(lastLine->lineBoxBottom());
|
|
InlineIterator iter = InlineIterator(&m_flow, lastLine->lineBreakObj(), lastLine->lineBreakPos());
|
|
resolver.setPosition(iter, numberOfIsolateAncestors(iter));
|
|
resolver.setStatus(lastLine->lineBreakBidiStatus());
|
|
} else {
|
|
TextDirection direction = style().direction();
|
|
if (style().unicodeBidi() == Plaintext)
|
|
determineDirectionality(direction, InlineIterator(&m_flow, bidiFirstSkippingEmptyInlines(m_flow), 0));
|
|
resolver.setStatus(BidiStatus(direction, isOverride(style().unicodeBidi())));
|
|
InlineIterator iter = InlineIterator(&m_flow, bidiFirstSkippingEmptyInlines(m_flow, &resolver), 0);
|
|
resolver.setPosition(iter, numberOfIsolateAncestors(iter));
|
|
}
|
|
return currentLine;
|
|
}
|
|
|
|
void LegacyLineLayout::determineEndPosition(LineLayoutState& layoutState, LegacyRootInlineBox* startLine, InlineIterator& cleanLineStart, BidiStatus& cleanLineBidiStatus)
|
|
{
|
|
auto iteratorForFirstDirtyFloat = [](LineLayoutState::FloatList& floats) {
|
|
auto lastCleanFloat = floats.lastCleanFloat();
|
|
if (!lastCleanFloat)
|
|
return floats.begin();
|
|
auto* lastCleanFloatWithRect = floats.floatWithRect(*lastCleanFloat);
|
|
ASSERT(lastCleanFloatWithRect);
|
|
return ++floats.find(*lastCleanFloatWithRect);
|
|
};
|
|
|
|
ASSERT(!layoutState.endLine());
|
|
auto floatsIterator = iteratorForFirstDirtyFloat(layoutState.floatList());
|
|
auto end = layoutState.floatList().end();
|
|
LegacyRootInlineBox* lastLine = nullptr;
|
|
for (auto* currentLine = startLine->nextRootBox(); currentLine; currentLine = currentLine->nextRootBox()) {
|
|
if (!currentLine->isDirty()) {
|
|
if (auto* cleanLineFloats = currentLine->floatsPtr()) {
|
|
bool encounteredNewFloat = false;
|
|
bool dirtiedByFloat = false;
|
|
for (auto& floatBoxOnCleanLine : *cleanLineFloats) {
|
|
if (!floatBoxOnCleanLine)
|
|
continue;
|
|
ASSERT(floatsIterator != end);
|
|
checkFloatInCleanLine(*currentLine, *floatBoxOnCleanLine, *floatsIterator, encounteredNewFloat, dirtiedByFloat);
|
|
++floatsIterator;
|
|
if (floatsIterator == end || encounteredNewFloat)
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (currentLine->isDirty())
|
|
lastLine = nullptr;
|
|
else if (!lastLine)
|
|
lastLine = currentLine;
|
|
}
|
|
|
|
if (!lastLine)
|
|
return;
|
|
|
|
// At this point, |last| is the first line in a run of clean lines that ends with the last line
|
|
// in the block.
|
|
LegacyRootInlineBox* previousLine = lastLine->prevRootBox();
|
|
cleanLineStart = InlineIterator(&m_flow, previousLine->lineBreakObj(), previousLine->lineBreakPos());
|
|
cleanLineBidiStatus = previousLine->lineBreakBidiStatus();
|
|
layoutState.setEndLineLogicalTop(previousLine->lineBoxBottom());
|
|
|
|
for (auto* line = lastLine; line; line = line->nextRootBox()) {
|
|
// Disconnect all line boxes from their render objects while preserving their connections to one another.
|
|
line->extractLine();
|
|
}
|
|
layoutState.setEndLine(lastLine);
|
|
}
|
|
|
|
bool LegacyLineLayout::checkPaginationAndFloatsAtEndLine(LineLayoutState& layoutState)
|
|
{
|
|
LayoutUnit lineDelta = m_flow.logicalHeight() - layoutState.endLineLogicalTop();
|
|
|
|
bool paginated = layoutContext().layoutState() && layoutContext().layoutState()->isPaginated();
|
|
if (paginated && layoutState.fragmentedFlow()) {
|
|
// Check all lines from here to the end, and see if the hypothetical new position for the lines will result
|
|
// in a different available line width.
|
|
for (auto* lineBox = layoutState.endLine(); lineBox; lineBox = lineBox->nextRootBox()) {
|
|
if (paginated) {
|
|
// This isn't the real move we're going to do, so don't update the line box's pagination
|
|
// strut yet.
|
|
LayoutUnit oldPaginationStrut = lineBox->paginationStrut();
|
|
bool overflowsFragment;
|
|
lineDelta -= oldPaginationStrut;
|
|
m_flow.adjustLinePositionForPagination(lineBox, lineDelta, overflowsFragment, layoutState.fragmentedFlow());
|
|
lineBox->setPaginationStrut(oldPaginationStrut);
|
|
}
|
|
if (lineWidthForPaginatedLineChanged(lineBox, lineDelta, layoutState.fragmentedFlow()))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!lineDelta || !m_flow.floatingObjects())
|
|
return true;
|
|
|
|
// See if any floats end in the range along which we want to shift the lines vertically.
|
|
LayoutUnit logicalTop = std::min(m_flow.logicalHeight(), layoutState.endLineLogicalTop());
|
|
|
|
LegacyRootInlineBox* lastLine = layoutState.endLine();
|
|
while (LegacyRootInlineBox* nextLine = lastLine->nextRootBox())
|
|
lastLine = nextLine;
|
|
|
|
LayoutUnit logicalBottom = lastLine->lineBoxBottom() + absoluteValue(lineDelta);
|
|
|
|
const FloatingObjectSet& floatingObjectSet = m_flow.floatingObjects()->set();
|
|
auto end = floatingObjectSet.end();
|
|
for (auto it = floatingObjectSet.begin(); it != end; ++it) {
|
|
const auto& floatingObject = *it->get();
|
|
if (m_flow.logicalBottomForFloat(floatingObject) >= logicalTop && m_flow.logicalBottomForFloat(floatingObject) < logicalBottom)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool LegacyLineLayout::lineWidthForPaginatedLineChanged(LegacyRootInlineBox* rootBox, LayoutUnit lineDelta, RenderFragmentedFlow* fragmentedFlow) const
|
|
{
|
|
if (!fragmentedFlow)
|
|
return false;
|
|
|
|
RenderFragmentContainer* currentFragment = m_flow.fragmentAtBlockOffset(rootBox->lineBoxTop() + lineDelta);
|
|
// Just bail if the fragment didn't change.
|
|
if (rootBox->containingFragment() == currentFragment)
|
|
return false;
|
|
return rootBox->paginatedLineWidth() != m_flow.availableLogicalWidthForContent(currentFragment);
|
|
}
|
|
|
|
bool LegacyLineLayout::matchedEndLine(LineLayoutState& layoutState, const InlineBidiResolver& resolver, const InlineIterator& endLineStart, const BidiStatus& endLineStatus)
|
|
{
|
|
if (resolver.position() == endLineStart) {
|
|
if (resolver.status() != endLineStatus)
|
|
return false;
|
|
return checkPaginationAndFloatsAtEndLine(layoutState);
|
|
}
|
|
|
|
// The first clean line doesn't match, but we can check a handful of following lines to try
|
|
// to match back up.
|
|
static const int numLines = 8; // The # of lines we're willing to match against.
|
|
LegacyRootInlineBox* originalEndLine = layoutState.endLine();
|
|
LegacyRootInlineBox* line = originalEndLine;
|
|
for (int i = 0; i < numLines && line; i++, line = line->nextRootBox()) {
|
|
if (line->lineBreakObj() == resolver.position().renderer() && line->lineBreakPos() == resolver.position().offset()) {
|
|
// We have a match.
|
|
if (line->lineBreakBidiStatus() != resolver.status())
|
|
return false; // ...but the bidi state doesn't match.
|
|
|
|
bool matched = false;
|
|
LegacyRootInlineBox* result = line->nextRootBox();
|
|
layoutState.setEndLine(result);
|
|
if (result) {
|
|
layoutState.setEndLineLogicalTop(line->lineBoxBottom());
|
|
matched = checkPaginationAndFloatsAtEndLine(layoutState);
|
|
}
|
|
|
|
// Now delete the lines that we failed to sync.
|
|
deleteLineRange(layoutState, originalEndLine, result);
|
|
return matched;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void LegacyLineLayout::addOverflowFromInlineChildren()
|
|
{
|
|
LayoutUnit endPadding = m_flow.hasNonVisibleOverflow() ? m_flow.paddingEnd() : 0_lu;
|
|
// FIXME: Need to find another way to do this, since scrollbars could show when we don't want them to.
|
|
if (!endPadding)
|
|
endPadding = m_flow.endPaddingWidthForCaret();
|
|
if (m_flow.hasNonVisibleOverflow() && !endPadding && m_flow.element() && m_flow.element()->isRootEditableElement() && style().isLeftToRightDirection())
|
|
endPadding = 1;
|
|
for (auto* curr = firstRootBox(); curr; curr = curr->nextRootBox()) {
|
|
m_flow.addLayoutOverflow(curr->paddedLayoutOverflowRect(endPadding));
|
|
RenderFragmentContainer* fragment = m_flow.enclosingFragmentedFlow() ? curr->containingFragment() : nullptr;
|
|
if (fragment)
|
|
fragment->addLayoutOverflowForBox(&m_flow, curr->paddedLayoutOverflowRect(endPadding));
|
|
if (!m_flow.hasNonVisibleOverflow()) {
|
|
LayoutRect childVisualOverflowRect = curr->visualOverflowRect(curr->lineTop(), curr->lineBottom());
|
|
m_flow.addVisualOverflow(childVisualOverflowRect);
|
|
if (fragment)
|
|
fragment->addVisualOverflowForBox(&m_flow, childVisualOverflowRect);
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t LegacyLineLayout::lineCount() const
|
|
{
|
|
size_t count = 0;
|
|
for (auto* box = firstRootBox(); box; box = box->nextRootBox())
|
|
++count;
|
|
|
|
return count;
|
|
}
|
|
|
|
size_t LegacyLineLayout::lineCountUntil(const LegacyRootInlineBox* stopRootInlineBox) const
|
|
{
|
|
size_t count = 0;
|
|
for (auto* box = firstRootBox(); box; box = box->nextRootBox()) {
|
|
++count;
|
|
if (box == stopRootInlineBox)
|
|
break;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
void LegacyLineLayout::deleteEllipsisLineBoxes()
|
|
{
|
|
TextAlignMode textAlign = style().textAlign();
|
|
bool ltr = style().isLeftToRightDirection();
|
|
IndentTextOrNot shouldIndentText = IndentText;
|
|
for (auto* curr = firstRootBox(); curr; curr = curr->nextRootBox()) {
|
|
if (curr->hasEllipsisBox()) {
|
|
curr->clearTruncation();
|
|
|
|
// Shift the line back where it belongs if we cannot accomodate an ellipsis.
|
|
float logicalLeft = m_flow.logicalLeftOffsetForLine(curr->lineTop(), shouldIndentText);
|
|
float availableLogicalWidth = m_flow.logicalRightOffsetForLine(curr->lineTop(), DoNotIndentText) - logicalLeft;
|
|
float totalLogicalWidth = curr->logicalWidth();
|
|
updateLogicalWidthForAlignment(m_flow, textAlign, curr, 0, logicalLeft, totalLogicalWidth, availableLogicalWidth, 0);
|
|
|
|
if (ltr)
|
|
curr->adjustLogicalPosition((logicalLeft - curr->logicalLeft()), 0);
|
|
else
|
|
curr->adjustLogicalPosition(-(curr->logicalLeft() - logicalLeft), 0);
|
|
}
|
|
shouldIndentText = DoNotIndentText;
|
|
}
|
|
}
|
|
|
|
void LegacyLineLayout::checkLinesForTextOverflow()
|
|
{
|
|
// Determine the width of the ellipsis using the current font.
|
|
// FIXME: CSS3 says this is configurable, also need to use 0x002E (FULL STOP) if horizontal ellipsis is "not renderable"
|
|
const FontCascade& font = style().fontCascade();
|
|
static MainThreadNeverDestroyed<const AtomString> ellipsisStr(&horizontalEllipsis, 1);
|
|
const FontCascade& firstLineFont = m_flow.firstLineStyle().fontCascade();
|
|
float firstLineEllipsisWidth = firstLineFont.width(m_flow.constructTextRun(&horizontalEllipsis, 1, m_flow.firstLineStyle()));
|
|
float ellipsisWidth = (font == firstLineFont) ? firstLineEllipsisWidth : font.width(m_flow.constructTextRun(&horizontalEllipsis, 1, style()));
|
|
|
|
// For LTR text truncation, we want to get the right edge of our padding box, and then we want to see
|
|
// if the right edge of a line box exceeds that. For RTL, we use the left edge of the padding box and
|
|
// check the left edge of the line box to see if it is less
|
|
// Include the scrollbar for overflow blocks, which means we want to use "contentWidth()"
|
|
bool ltr = style().isLeftToRightDirection();
|
|
TextAlignMode textAlign = style().textAlign();
|
|
bool firstLine = true;
|
|
for (auto* curr = firstRootBox(); curr; curr = curr->nextRootBox()) {
|
|
IndentTextOrNot shouldIndentText = firstLine ? IndentText : DoNotIndentText;
|
|
LayoutUnit blockRightEdge = m_flow.logicalRightOffsetForLine(curr->lineTop(), shouldIndentText);
|
|
LayoutUnit blockLeftEdge = m_flow.logicalLeftOffsetForLine(curr->lineTop(), shouldIndentText);
|
|
LayoutUnit lineBoxEdge { ltr ? curr->x() + curr->logicalWidth() : curr->x() };
|
|
if ((ltr && lineBoxEdge > blockRightEdge) || (!ltr && lineBoxEdge < blockLeftEdge)) {
|
|
// This line spills out of our box in the appropriate direction. Now we need to see if the line
|
|
// can be truncated. In order for truncation to be possible, the line must have sufficient space to
|
|
// accommodate our truncation string, and no replaced elements (images, tables) can overlap the ellipsis
|
|
// space.
|
|
LayoutUnit width { firstLine ? firstLineEllipsisWidth : ellipsisWidth };
|
|
LayoutUnit blockEdge { ltr ? blockRightEdge : blockLeftEdge };
|
|
if (curr->lineCanAccommodateEllipsis(ltr, blockEdge, lineBoxEdge, width)) {
|
|
float totalLogicalWidth = curr->placeEllipsis(ellipsisStr, ltr, blockLeftEdge, blockRightEdge, width);
|
|
|
|
float logicalLeft = 0; // We are only interested in the delta from the base position.
|
|
float truncatedWidth = m_flow.availableLogicalWidthForLine(curr->lineTop(), shouldIndentText);
|
|
updateLogicalWidthForAlignment(m_flow, textAlign, curr, nullptr, logicalLeft, totalLogicalWidth, truncatedWidth, 0);
|
|
if (ltr)
|
|
curr->adjustLogicalPosition(logicalLeft, 0);
|
|
else
|
|
curr->adjustLogicalPosition(-(truncatedWidth - (logicalLeft + totalLogicalWidth)), 0);
|
|
}
|
|
}
|
|
firstLine = false;
|
|
}
|
|
}
|
|
|
|
bool LegacyLineLayout::positionNewFloatOnLine(const FloatingObject& newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo& lineInfo, LineWidth& width)
|
|
{
|
|
if (!m_flow.positionNewFloats())
|
|
return false;
|
|
|
|
width.shrinkAvailableWidthForNewFloatIfNeeded(newFloat);
|
|
|
|
// We only connect floats to lines for pagination purposes if the floats occur at the start of
|
|
// the line and the previous line had a hard break (so this line is either the first in the block
|
|
// or follows a <br>).
|
|
if (!newFloat.paginationStrut() || !lineInfo.previousLineBrokeCleanly() || !lineInfo.isEmpty())
|
|
return true;
|
|
|
|
const FloatingObjectSet& floatingObjectSet = m_flow.floatingObjects()->set();
|
|
ASSERT(floatingObjectSet.last().get() == &newFloat);
|
|
|
|
LayoutUnit floatLogicalTop = m_flow.logicalTopForFloat(newFloat);
|
|
LayoutUnit paginationStrut = newFloat.paginationStrut();
|
|
|
|
if (floatLogicalTop - paginationStrut != m_flow.logicalHeight() + lineInfo.floatPaginationStrut())
|
|
return true;
|
|
|
|
auto it = floatingObjectSet.end();
|
|
--it; // Last float is newFloat, skip that one.
|
|
auto begin = floatingObjectSet.begin();
|
|
while (it != begin) {
|
|
--it;
|
|
auto& floatingObject = *it->get();
|
|
if (&floatingObject == lastFloatFromPreviousLine)
|
|
break;
|
|
if (m_flow.logicalTopForFloat(floatingObject) == m_flow.logicalHeight() + lineInfo.floatPaginationStrut()) {
|
|
floatingObject.setPaginationStrut(paginationStrut + floatingObject.paginationStrut());
|
|
RenderBox& floatBox = floatingObject.renderer();
|
|
m_flow.setLogicalTopForChild(floatBox, m_flow.logicalTopForChild(floatBox) + m_flow.marginBeforeForChild(floatBox) + paginationStrut);
|
|
|
|
if (m_flow.updateFragmentRangeForBoxChild(floatBox))
|
|
floatBox.setNeedsLayout(MarkOnlyThis);
|
|
else if (is<RenderBlock>(floatBox))
|
|
downcast<RenderBlock>(floatBox).setChildNeedsLayout(MarkOnlyThis);
|
|
floatBox.layoutIfNeeded();
|
|
|
|
// Save the old logical top before calling removePlacedObject which will set
|
|
// isPlaced to false. Otherwise it will trigger an assert in logicalTopForFloat.
|
|
LayoutUnit oldLogicalTop = m_flow.logicalTopForFloat(floatingObject);
|
|
m_flow.floatingObjects()->removePlacedObject(&floatingObject);
|
|
m_flow.setLogicalTopForFloat(floatingObject, oldLogicalTop + paginationStrut);
|
|
m_flow.floatingObjects()->addPlacedObject(&floatingObject);
|
|
}
|
|
}
|
|
|
|
// Just update the line info's pagination strut without altering our logical height yet. If the line ends up containing
|
|
// no content, then we don't want to improperly grow the height of the block.
|
|
lineInfo.setFloatPaginationStrut(lineInfo.floatPaginationStrut() + paginationStrut);
|
|
return true;
|
|
}
|
|
|
|
void LegacyLineLayout::updateFragmentForLine(LegacyRootInlineBox* lineBox) const
|
|
{
|
|
ASSERT(lineBox);
|
|
|
|
if (!m_flow.hasFragmentRangeInFragmentedFlow())
|
|
lineBox->clearContainingFragment();
|
|
else {
|
|
if (auto containingFragment = m_flow.fragmentAtBlockOffset(lineBox->lineBoxTop()))
|
|
lineBox->setContainingFragment(*containingFragment);
|
|
else
|
|
lineBox->clearContainingFragment();
|
|
}
|
|
|
|
LegacyRootInlineBox* prevLineBox = lineBox->prevRootBox();
|
|
if (!prevLineBox)
|
|
return;
|
|
|
|
// This check is more accurate than the one in |adjustLinePositionForPagination| because it takes into
|
|
// account just the container changes between lines. The before mentioned function doesn't set the flag
|
|
// correctly if the line is positioned at the top of the last fragment container.
|
|
if (lineBox->containingFragment() != prevLineBox->containingFragment())
|
|
lineBox->setIsFirstAfterPageBreak(true);
|
|
}
|
|
|
|
const RenderStyle& LegacyLineLayout::style() const
|
|
{
|
|
return m_flow.style();
|
|
}
|
|
|
|
const FrameViewLayoutContext& LegacyLineLayout::layoutContext() const
|
|
{
|
|
return m_flow.view().frameView().layoutContext();
|
|
}
|
|
|
|
|
|
}
|