зеркало из https://github.com/mozilla/gecko-dev.git
91 строка
2.7 KiB
C++
91 строка
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* representation of CSSRuleList for stylo */
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#ifndef mozilla_ServoCSSRuleList_h
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#define mozilla_ServoCSSRuleList_h
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#include "mozilla/ServoBindingTypes.h"
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#include "mozilla/dom/CSSRuleList.h"
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#include "nsDataHashtable.h"
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namespace mozilla {
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namespace dom {
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class CSSStyleRule;
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} // namespace dom
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class StyleSheet;
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namespace css {
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class GroupRule;
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class Rule;
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} // namespace css
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class ServoCSSRuleList final : public dom::CSSRuleList {
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public:
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ServoCSSRuleList(already_AddRefed<ServoCssRules> aRawRules,
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StyleSheet* aSheet, css::GroupRule* aParentRule);
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css::GroupRule* GetParentRule() const { return mParentRule; }
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void DropSheetReference();
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void DropParentRuleReference();
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void DropReferences() {
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DropSheetReference();
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DropParentRuleReference();
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}
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ServoCSSRuleList, dom::CSSRuleList)
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StyleSheet* GetParentObject() final { return mStyleSheet; }
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css::Rule* IndexedGetter(uint32_t aIndex, bool& aFound) final;
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uint32_t Length() final { return mRules.Length(); }
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css::Rule* GetRule(uint32_t aIndex);
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nsresult InsertRule(const nsACString& aRule, uint32_t aIndex);
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nsresult DeleteRule(uint32_t aIndex);
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uint16_t GetDOMCSSRuleType(uint32_t aIndex) const;
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private:
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virtual ~ServoCSSRuleList();
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// XXX Is it possible to have an address lower than or equal to 255?
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// Is it possible to have more than 255 CSS rule types?
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static const uintptr_t kMaxRuleType = UINT8_MAX;
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static uintptr_t CastToUint(css::Rule* aPtr) {
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return reinterpret_cast<uintptr_t>(aPtr);
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}
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static css::Rule* CastToPtr(uintptr_t aInt) {
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MOZ_ASSERT(aInt > kMaxRuleType);
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return reinterpret_cast<css::Rule*>(aInt);
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}
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template <typename Func>
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void EnumerateInstantiatedRules(Func aCallback);
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void DropAllRules();
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bool IsReadOnly() const;
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// mStyleSheet may be nullptr when it drops the reference to us.
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StyleSheet* mStyleSheet = nullptr;
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// mParentRule is nullptr if it isn't a nested rule list.
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css::GroupRule* mParentRule = nullptr;
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RefPtr<ServoCssRules> mRawRules;
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// Array stores either a number indicating rule type, or a pointer to
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// css::Rule. If the value is less than kMaxRuleType, the given rule
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// instance has not been constructed, and the value means the type
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// of the rule. Otherwise, it is a pointer.
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nsTArray<uintptr_t> mRules;
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};
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} // namespace mozilla
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#endif // mozilla_ServoCSSRuleList_h
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