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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ServoStyleRuleMap_h
#define mozilla_ServoStyleRuleMap_h
#include "mozilla/css/Rule.h"
#include "mozilla/StyleSheet.h"
#include "nsTHashMap.h"
struct StyleLockedStyleRule;
namespace mozilla {
class ServoCSSRuleList;
class ServoStyleSet;
namespace css {
class Rule;
} // namespace css
namespace dom {
class ShadowRoot;
}
class ServoStyleRuleMap final {
public:
ServoStyleRuleMap() = default;
void EnsureTable(ServoStyleSet&);
void EnsureTable(dom::ShadowRoot&);
css::Rule* Lookup(const StyleLockedDeclarationBlock* aDecls) const {
return mTable.Get(aDecls);
}
void SheetAdded(StyleSheet&);
void SheetRemoved(StyleSheet&);
void SheetCloned(StyleSheet&);
void RuleAdded(StyleSheet& aStyleSheet, css::Rule&);
void RuleRemoved(StyleSheet& aStyleSheet, css::Rule&);
void RuleDeclarationsChanged(css::Rule&,
const StyleLockedDeclarationBlock* aOld,
const StyleLockedDeclarationBlock* aNew);
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
~ServoStyleRuleMap() = default;
private:
// Since we would never have a document which contains no style rule,
// we use IsEmpty as an indication whether we need to walk through
// all stylesheets to fill the table.
bool IsEmpty() const { return mTable.IsEmpty(); }
void FillTableFromRule(css::Rule&);
void FillTableFromRuleList(ServoCSSRuleList&);
void FillTableFromStyleSheet(StyleSheet&);
using Hashtable = nsTHashMap<nsPtrHashKey<const StyleLockedDeclarationBlock>,
WeakPtr<css::Rule>>;
Hashtable mTable;
};
} // namespace mozilla
#endif // mozilla_ServoStyleRuleMap_h
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