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/*
* Copyright (C) 2017 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 "RenderTreePosition.h"
#include "RenderWidget.h"
namespace WebCore {
class RenderGrid;
class RenderTreeUpdater;
class RenderTreeBuilder {
public:
RenderTreeBuilder(RenderView&);
~RenderTreeBuilder();
// This avoids having to convert all sites that need RenderTreeBuilder in one go.
// FIXME: Remove.
static RenderTreeBuilder* current() { return s_current; }
static bool isRebuildRootForChildren(const RenderElement&);
void attach(RenderElement& parent, RenderPtr<RenderObject>, RenderObject* beforeChild = nullptr);
enum class IsInternalMove : bool { No, Yes };
enum class WillBeDestroyed : bool { No, Yes };
enum class CanCollapseAnonymousBlock : bool { No, Yes };
RenderPtr<RenderObject> detach(RenderElement&, RenderObject&, WillBeDestroyed, CanCollapseAnonymousBlock = CanCollapseAnonymousBlock::Yes) WARN_UNUSED_RETURN;
enum class TearDownType : uint8_t {
Root, // destroy root renderer
SubtreeWithRootStillAttached, // subtree teardown when renderers are still attached to the tree (common case)
SubtreeWithRootAlreadyDetached // subtree teardown when destroy root gets detached first followed by destroying renderers (e.g. pseudo subtree)
};
void destroy(RenderObject& renderer, CanCollapseAnonymousBlock = CanCollapseAnonymousBlock::Yes);
// NormalizeAfterInsertion::Yes ensures that the destination subtree is consistent after the insertion (anonymous wrappers etc).
enum class NormalizeAfterInsertion : bool { No, Yes };
void move(RenderBoxModelObject& from, RenderBoxModelObject& to, RenderObject& child, NormalizeAfterInsertion);
void updateAfterDescendants(RenderElement&);
void destroyAndCleanUpAnonymousWrappers(RenderObject& child, const RenderElement* destroyRoot);
void normalizeTreeAfterStyleChange(RenderElement&, RenderStyle& oldStyle);
bool hasBrokenContinuation() const { return m_hasBrokenContinuation; }
private:
static void markBoxForRelayoutAfterSplit(RenderBox&);
void attachInternal(RenderElement& parent, RenderPtr<RenderObject>, RenderObject* beforeChild);
void childFlowStateChangesAndAffectsParentBlock(RenderElement& child);
void childFlowStateChangesAndNoLongerAffectsParentBlock(RenderElement& child);
void attachIgnoringContinuation(RenderElement& parent, RenderPtr<RenderObject>, RenderObject* beforeChild = nullptr);
void attachToRenderGrid(RenderGrid& parent, RenderPtr<RenderObject> child, RenderObject* beforeChild = nullptr);
void attachToRenderElement(RenderElement& parent, RenderPtr<RenderObject> child, RenderObject* beforeChild = nullptr);
void attachToRenderElementInternal(RenderElement& parent, RenderPtr<RenderObject> child, RenderObject* beforeChild = nullptr);
RenderPtr<RenderObject> detachFromRenderElement(RenderElement& parent, RenderObject& child, WillBeDestroyed) WARN_UNUSED_RETURN;
RenderPtr<RenderObject> detachFromRenderGrid(RenderGrid& parent, RenderObject& child, WillBeDestroyed) WARN_UNUSED_RETURN;
void move(RenderBoxModelObject& from, RenderBoxModelObject& to, RenderObject& child, RenderObject* beforeChild, NormalizeAfterInsertion);
// Move all of the kids from |startChild| up to but excluding |endChild|. 0 can be passed as the |endChild| to denote
// that all the kids from |startChild| onwards should be moved.
void moveChildren(RenderBoxModelObject& from, RenderBoxModelObject& to, RenderObject* startChild, RenderObject* endChild, NormalizeAfterInsertion);
void moveChildren(RenderBoxModelObject& from, RenderBoxModelObject& to, RenderObject* startChild, RenderObject* endChild, RenderObject* beforeChild, NormalizeAfterInsertion);
void moveAllChildrenIncludingFloats(RenderBlock& from, RenderBlock& toBlock, RenderTreeBuilder::NormalizeAfterInsertion);
void moveAllChildren(RenderBoxModelObject& from, RenderBoxModelObject& to, NormalizeAfterInsertion);
void moveAllChildren(RenderBoxModelObject& from, RenderBoxModelObject& to, RenderObject* beforeChild, NormalizeAfterInsertion);
void removeFloatingObjects(RenderBlock&);
RenderObject* splitAnonymousBoxesAroundChild(RenderBox& parent, RenderObject& originalBeforeChild);
void createAnonymousWrappersForInlineContent(RenderBlock& parent, RenderObject* insertionPoint = nullptr);
void removeAnonymousWrappersForInlineChildrenIfNeeded(RenderElement& parent);
void reportVisuallyNonEmptyContent(const RenderElement& parent, const RenderObject& child);
void setHasBrokenContinuation() { m_hasBrokenContinuation = true; }
class FirstLetter;
class List;
class MultiColumn;
class Table;
class Ruby;
class FormControls;
class Block;
class BlockFlow;
class Inline;
class SVG;
#if ENABLE(MATHML)
class MathML;
#endif
class Continuation;
FirstLetter& firstLetterBuilder() { return *m_firstLetterBuilder; }
List& listBuilder() { return *m_listBuilder; }
MultiColumn& multiColumnBuilder() { return *m_multiColumnBuilder; }
Table& tableBuilder() { return *m_tableBuilder; }
Ruby& rubyBuilder() { return *m_rubyBuilder; }
FormControls& formControlsBuilder() { return *m_formControlsBuilder; }
Block& blockBuilder() { return *m_blockBuilder; }
BlockFlow& blockFlowBuilder() { return *m_blockFlowBuilder; }
Inline& inlineBuilder() { return *m_inlineBuilder; }
SVG& svgBuilder() { return *m_svgBuilder; }
#if ENABLE(MATHML)
MathML& mathMLBuilder() { return *m_mathMLBuilder; }
#endif
Continuation& continuationBuilder() { return *m_continuationBuilder; }
WidgetHierarchyUpdatesSuspensionScope m_widgetHierarchyUpdatesSuspensionScope;
RenderView& m_view;
RenderTreeBuilder* m_previous { nullptr };
static RenderTreeBuilder* s_current;
std::unique_ptr<FirstLetter> m_firstLetterBuilder;
std::unique_ptr<List> m_listBuilder;
std::unique_ptr<MultiColumn> m_multiColumnBuilder;
std::unique_ptr<Table> m_tableBuilder;
std::unique_ptr<Ruby> m_rubyBuilder;
std::unique_ptr<FormControls> m_formControlsBuilder;
std::unique_ptr<Block> m_blockBuilder;
std::unique_ptr<BlockFlow> m_blockFlowBuilder;
std::unique_ptr<Inline> m_inlineBuilder;
std::unique_ptr<SVG> m_svgBuilder;
#if ENABLE(MATHML)
std::unique_ptr<MathML> m_mathMLBuilder;
#endif
std::unique_ptr<Continuation> m_continuationBuilder;
bool m_hasBrokenContinuation { false };
IsInternalMove m_internalMovesType { IsInternalMove::No };
TearDownType m_tearDownType { TearDownType::Root };
CheckedPtr<const RenderElement> m_subtreeDestroyRoot;
SingleThreadWeakPtr<const RenderObject> m_anonymousDestroyRoot;
};
}
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