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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
* All rights reserved.
* Copyright (C) 2012 Google 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.
*/
#ifndef ScopedStyleResolver_h
#define ScopedStyleResolver_h
#include "core/css/ActiveStyleSheets.h"
#include "core/css/ElementRuleCollector.h"
#include "core/css/RuleSet.h"
#include "core/dom/TreeScope.h"
#include "wtf/HashMap.h"
#include "wtf/HashSet.h"
namespace blink {
class PageRuleCollector;
class StyleSheetContents;
// This class selects a ComputedStyle for a given element based on a collection
// of stylesheets.
class ScopedStyleResolver final : public GarbageCollected<ScopedStyleResolver> {
WTF_MAKE_NONCOPYABLE(ScopedStyleResolver);
public:
static ScopedStyleResolver* create(TreeScope& scope) {
return new ScopedStyleResolver(scope);
}
const TreeScope& treeScope() const { return *m_scope; }
ScopedStyleResolver* parent() const;
StyleRuleKeyframes* keyframeStylesForAnimation(
const StringImpl* animationName);
void appendActiveStyleSheets(unsigned index, const ActiveStyleSheetVector&);
void collectMatchingAuthorRules(ElementRuleCollector&,
CascadeOrder = ignoreCascadeOrder);
void collectMatchingShadowHostRules(ElementRuleCollector&,
CascadeOrder = ignoreCascadeOrder);
void collectMatchingTreeBoundaryCrossingRules(
ElementRuleCollector&,
CascadeOrder = ignoreCascadeOrder);
void matchPageRules(PageRuleCollector&);
void collectFeaturesTo(RuleFeatureSet&,
HeapHashSet<Member<const StyleSheetContents>>&
visitedSharedStyleSheetContents) const;
void resetAuthorStyle();
bool hasDeepOrShadowSelector() const { return m_hasDeepOrShadowSelector; }
void setHasUnresolvedKeyframesRule() { m_hasUnresolvedKeyframesRule = true; }
bool needsAppendAllSheets() const { return m_needsAppendAllSheets; }
void setNeedsAppendAllSheets() { m_needsAppendAllSheets = true; }
static void keyframesRulesAdded(const TreeScope&);
static ContainerNode& invalidationRootForTreeScope(const TreeScope&);
CORE_EXPORT static bool haveSameStyles(const ScopedStyleResolver*,
const ScopedStyleResolver*);
DECLARE_TRACE();
private:
explicit ScopedStyleResolver(TreeScope& scope) : m_scope(scope) {}
void addTreeBoundaryCrossingRules(const RuleSet&,
CSSStyleSheet*,
unsigned sheetIndex);
void addKeyframeRules(const RuleSet&);
void addFontFaceRules(const RuleSet&);
void addKeyframeStyle(StyleRuleKeyframes*);
Member<TreeScope> m_scope;
HeapVector<Member<CSSStyleSheet>> m_authorStyleSheets;
MediaQueryResultList m_viewportDependentMediaQueryResults;
MediaQueryResultList m_deviceDependentMediaQueryResults;
using KeyframesRuleMap =
HeapHashMap<const StringImpl*, Member<StyleRuleKeyframes>>;
KeyframesRuleMap m_keyframesRuleMap;
class RuleSubSet final : public GarbageCollected<RuleSubSet> {
public:
static RuleSubSet* create(CSSStyleSheet* sheet,
unsigned index,
RuleSet* rules) {
return new RuleSubSet(sheet, index, rules);
}
Member<CSSStyleSheet> m_parentStyleSheet;
unsigned m_parentIndex;
Member<RuleSet> m_ruleSet;
DECLARE_TRACE();
private:
RuleSubSet(CSSStyleSheet* sheet, unsigned index, RuleSet* rules)
: m_parentStyleSheet(sheet), m_parentIndex(index), m_ruleSet(rules) {}
};
using CSSStyleSheetRuleSubSet = HeapVector<Member<RuleSubSet>>;
Member<CSSStyleSheetRuleSubSet> m_treeBoundaryCrossingRuleSet;
bool m_hasDeepOrShadowSelector = false;
bool m_hasUnresolvedKeyframesRule = false;
bool m_needsAppendAllSheets = false;
};
} // namespace blink
#endif // ScopedStyleResolver_h
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