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/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "FloatRect.h"
#include "InlineDamage.h"
#include "InlineFormattingConstraints.h"
#include "InlineFormattingContext.h"
#include "InlineIteratorInlineBox.h"
#include "InlineIteratorLineBox.h"
#include "InlineIteratorTextBox.h"
#include "LayoutIntegrationBoxGeometryUpdater.h"
#include "LayoutIntegrationBoxTreeUpdater.h"
#include "LayoutPoint.h"
#include "LayoutState.h"
#include "RenderObjectEnums.h"
#include "SVGTextChunk.h"
#include <wtf/CheckedPtr.h>
namespace WebCore {
class HitTestLocation;
class HitTestRequest;
class HitTestResult;
class RenderBlockFlow;
class RenderBox;
class RenderBoxModelObject;
class RenderInline;
struct PaintInfo;
namespace Layout {
class InlineDamage;
}
namespace LayoutIntegration {
class InlineContent;
struct LineAdjustment;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(LayoutIntegration_LineLayout);
class LineLayout final : public CanMakeCheckedPtr<LineLayout> {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(LayoutIntegration_LineLayout);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(LineLayout);
public:
LineLayout(RenderBlockFlow&);
~LineLayout();
static RenderBlockFlow* blockContainer(const RenderObject&);
static LineLayout* containing(RenderObject&);
static const LineLayout* containing(const RenderObject&);
static bool canUseFor(const RenderBlockFlow&);
static bool canUseForPreferredWidthComputation(const RenderBlockFlow&);
static bool shouldInvalidateLineLayoutPathAfterContentChange(const RenderBlockFlow& parent, const RenderObject& rendererWithNewContent, const LineLayout&);
static bool shouldInvalidateLineLayoutPathAfterTreeMutation(const RenderBlockFlow& parent, const RenderObject& renderer, const LineLayout&, bool isRemoval);
void updateFormattingContexGeometries(LayoutUnit availableLogicalWidth);
void updateOverflow();
static void updateStyle(const RenderObject&);
// Partial invalidation.
bool insertedIntoTree(const RenderElement& parent, RenderObject& child);
bool removedFromTree(const RenderElement& parent, RenderObject& child);
bool updateTextContent(const RenderText&, size_t offset, int delta);
bool rootStyleWillChange(const RenderBlockFlow&, const RenderStyle& newStyle);
bool styleWillChange(const RenderElement&, const RenderStyle& newStyle, StyleDifference);
bool boxContentWillChange(const RenderBox&);
std::pair<LayoutUnit, LayoutUnit> computeIntrinsicWidthConstraints();
std::optional<LayoutRect> layout();
void paint(PaintInfo&, const LayoutPoint& paintOffset, const RenderInline* layerRenderer = nullptr);
bool hitTest(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint& accumulatedOffset, HitTestAction, const RenderInline* layerRenderer = nullptr);
void adjustForPagination();
void shiftLinesBy(LayoutUnit blockShift);
void collectOverflow();
LayoutRect inkOverflowBoundingBoxRectFor(const RenderInline&) const;
Vector<FloatRect> collectInlineBoxRects(const RenderInline&) const;
LayoutUnit contentLogicalHeight() const;
std::optional<LayoutUnit> clampedContentLogicalHeight() const;
bool hasEllipsisInBlockDirectionOnLastFormattedLine() const;
bool contains(const RenderElement& renderer) const;
bool isPaginated() const;
size_t lineCount() const;
bool hasInkOverflow() const;
LayoutUnit firstLinePhysicalBaseline() const;
LayoutUnit lastLinePhysicalBaseline() const;
LayoutUnit lastLineLogicalBaseline() const;
LayoutRect firstInlineBoxRect(const RenderInline&) const;
LayoutRect enclosingBorderBoxRectFor(const RenderInline&) const;
InlineIterator::TextBoxIterator textBoxesFor(const RenderText&) const;
InlineIterator::LeafBoxIterator boxFor(const RenderElement&) const;
InlineIterator::InlineBoxIterator firstInlineBoxFor(const RenderInline&) const;
InlineIterator::InlineBoxIterator firstRootInlineBox() const;
InlineIterator::LineBoxIterator firstLineBox() const;
InlineIterator::LineBoxIterator lastLineBox() const;
const RenderBlockFlow& flow() const { return downcast<RenderBlockFlow>(*m_rootLayoutBox->rendererForIntegration()); }
RenderBlockFlow& flow() { return downcast<RenderBlockFlow>(*m_rootLayoutBox->rendererForIntegration()); }
static void releaseCaches(RenderView&);
#if ENABLE(TREE_DEBUGGING)
void outputLineTree(WTF::TextStream&, size_t depth) const;
#endif
// This is temporary, required by partial bailout check.
bool contentNeedsVisualReordering() const;
bool isDamaged() const { return !!m_lineDamage; }
const Layout::InlineDamage* damage() const { return m_lineDamage.get(); }
#ifndef NDEBUG
bool hasDetachedContent() const { return m_lineDamage && m_lineDamage->hasDetachedContent(); }
#endif
FloatRect applySVGTextFragments(SVGTextFragmentMap&&);
private:
void preparePlacedFloats();
FloatRect constructContent(const Layout::InlineLayoutState&, Layout::InlineLayoutResult&&);
Vector<LineAdjustment> adjustContentForPagination(const Layout::BlockLayoutState&, bool isPartialLayout);
void updateRenderTreePositions(const Vector<LineAdjustment>&, const Layout::InlineLayoutState&, bool didDiscardContent);
InlineContent& ensureInlineContent();
Layout::LayoutState& layoutState() { return *m_layoutState; }
const Layout::LayoutState& layoutState() const { return *m_layoutState; }
Layout::InlineDamage& ensureLineDamage();
const Layout::ElementBox& rootLayoutBox() const { return *m_rootLayoutBox; }
Layout::ElementBox& rootLayoutBox() { return *m_rootLayoutBox; }
void clearInlineContent();
void releaseCachesAndResetDamage();
LayoutUnit physicalBaselineForLine(const InlineDisplay::Line&) const;
CheckedPtr<Layout::ElementBox> m_rootLayoutBox;
WeakPtr<Layout::LayoutState> m_layoutState;
Layout::BlockFormattingState& m_blockFormattingState;
Layout::InlineContentCache& m_inlineContentCache;
std::optional<Layout::ConstraintsForInlineContent> m_inlineContentConstraints;
// FIXME: This should be part of LayoutState.
std::unique_ptr<Layout::InlineDamage> m_lineDamage;
std::unique_ptr<InlineContent> m_inlineContent;
BoxGeometryUpdater m_boxGeometryUpdater;
};
}
}
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