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/*
* Copyright (C) 2013-2016 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. ``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
* 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 "SelectorChecker.h"
#include "SelectorMatchingState.h"
#include "StyleChange.h"
#include "StyleSharingResolver.h"
#include "StyleUpdate.h"
#include "Styleable.h"
#include <wtf/Function.h>
#include <wtf/Ref.h>
namespace WebCore {
class Document;
class Element;
class Node;
class RenderStyle;
class ShadowRoot;
namespace Style {
class Resolver;
struct MatchResult;
struct ResolutionContext;
struct ResolvedStyle;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(TreeResolverScope);
class TreeResolver {
public:
TreeResolver(Document&, std::unique_ptr<Update> = { });
~TreeResolver();
std::unique_ptr<Update> resolve();
bool hasUnresolvedQueryContainers() const { return m_hasUnresolvedQueryContainers; }
private:
enum class ResolutionType : uint8_t { FastPathInherit, Full };
ResolvedStyle styleForStyleable(const Styleable&, ResolutionType, const ResolutionContext&);
void resolveComposedTree();
const RenderStyle* existingStyle(const Element&);
enum class QueryContainerAction : uint8_t { None, Resolve, Continue };
enum class DescendantsToResolve : uint8_t { None, ChildrenWithExplicitInherit, Children, All };
QueryContainerAction updateStateForQueryContainer(Element&, const RenderStyle*, ContainerType previousContainerType, Change&, DescendantsToResolve&);
std::pair<ElementUpdate, DescendantsToResolve> resolveElement(Element&, const RenderStyle* existingStyle, ResolutionType);
ElementUpdate createAnimatedElementUpdate(ResolvedStyle&&, const Styleable&, Change, const ResolutionContext&);
HashSet<AnimatableProperty> applyCascadeAfterAnimation(RenderStyle&, const HashSet<AnimatableProperty>&, bool isTransition, const MatchResult&, const Element&, const ResolutionContext&);
std::optional<ElementUpdate> resolvePseudoElement(Element&, PseudoId, const ElementUpdate&);
std::optional<ElementUpdate> resolveAncestorPseudoElement(Element&, PseudoId, const ElementUpdate&);
std::optional<ResolvedStyle> resolveAncestorFirstLinePseudoElement(Element&, const ElementUpdate&);
std::optional<ResolvedStyle> resolveAncestorFirstLetterPseudoElement(Element&, const ElementUpdate&, ResolutionContext&);
struct Scope : RefCounted<Scope> {
WTF_MAKE_STRUCT_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(TreeResolverScope);
Ref<Resolver> resolver;
SelectorMatchingState selectorMatchingState;
SharingResolver sharingResolver;
RefPtr<ShadowRoot> shadowRoot;
RefPtr<Scope> enclosingScope;
Scope(Document&);
Scope(ShadowRoot&, Scope& enclosingScope);
~Scope();
};
struct Parent {
Element* element;
const RenderStyle& style;
Change change { Change::None };
DescendantsToResolve descendantsToResolve { DescendantsToResolve::None };
bool didPushScope { false };
bool resolvedFirstLineAndLetterChild { false };
bool needsUpdateQueryContainerDependentStyle { false };
Parent(Document&);
Parent(Element&, const RenderStyle&, Change, DescendantsToResolve);
};
Scope& scope() { return m_scopeStack.last(); }
Parent& parent() { return m_parentStack.last(); }
void pushScope(ShadowRoot&);
void pushEnclosingScope();
void popScope();
void pushParent(Element&, const RenderStyle&, Change, DescendantsToResolve);
void popParent();
void popParentsToDepth(unsigned depth);
static DescendantsToResolve computeDescendantsToResolve(Change, Validity, DescendantsToResolve);
static std::optional<ResolutionType> determineResolutionType(const Element&, const RenderStyle*, DescendantsToResolve, Change parentChange);
static void resetDescendantStyleRelations(Element&, DescendantsToResolve);
ResolutionContext makeResolutionContext();
ResolutionContext makeResolutionContextForPseudoElement(const ElementUpdate&, PseudoId);
std::optional<ResolutionContext> makeResolutionContextForInheritedFirstLine(const ElementUpdate&, const RenderStyle& inheritStyle);
const Parent* boxGeneratingParent() const;
const RenderStyle* parentBoxStyle() const;
const RenderStyle* parentBoxStyleForPseudoElement(const ElementUpdate&) const;
struct QueryContainerState {
Change change { Change::None };
DescendantsToResolve descendantsToResolve { DescendantsToResolve::None };
};
Document& m_document;
std::unique_ptr<RenderStyle> m_documentElementStyle;
Vector<Ref<Scope>, 4> m_scopeStack;
Vector<Parent, 32> m_parentStack;
bool m_didSeePendingStylesheet { false };
HashMap<Ref<Element>, std::optional<QueryContainerState>> m_queryContainerStates;
bool m_hasUnresolvedQueryContainers { false };
std::unique_ptr<Update> m_update;
};
// Integrate with the HTML5 event loop instead, see EventLoop.cpp and consumers.
void deprecatedQueuePostResolutionCallback(Function<void()>&&);
bool postResolutionCallbacksAreSuspended();
class PostResolutionCallbackDisabler {
public:
enum class DrainCallbacks : bool { No, Yes };
explicit PostResolutionCallbackDisabler(Document&, DrainCallbacks = DrainCallbacks::Yes);
~PostResolutionCallbackDisabler();
private:
DrainCallbacks m_drainCallbacks;
};
}
}
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