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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/. */
/* representation of CSSRuleList for stylo */
#ifndef mozilla_ServoCSSRuleList_h
#define mozilla_ServoCSSRuleList_h
#include "mozilla/ServoBindingTypes.h"
#include "mozilla/dom/CSSRuleList.h"
#include "nsDataHashtable.h"
namespace mozilla {
namespace dom {
class CSSStyleRule;
} // namespace dom
class StyleSheet;
namespace css {
class GroupRule;
class Rule;
} // namespace css
class ServoCSSRuleList final : public dom::CSSRuleList {
public:
ServoCSSRuleList(already_AddRefed<ServoCssRules> aRawRules,
StyleSheet* aSheet, css::GroupRule* aParentRule);
css::GroupRule* GetParentRule() const { return mParentRule; }
void DropSheetReference();
void DropParentRuleReference();
void DropReferences() {
DropSheetReference();
DropParentRuleReference();
}
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ServoCSSRuleList, dom::CSSRuleList)
StyleSheet* GetParentObject() final { return mStyleSheet; }
css::Rule* IndexedGetter(uint32_t aIndex, bool& aFound) final;
uint32_t Length() final { return mRules.Length(); }
css::Rule* GetRule(uint32_t aIndex);
nsresult InsertRule(const nsACString& aRule, uint32_t aIndex);
nsresult DeleteRule(uint32_t aIndex);
uint16_t GetDOMCSSRuleType(uint32_t aIndex) const;
private:
virtual ~ServoCSSRuleList();
// XXX Is it possible to have an address lower than or equal to 255?
// Is it possible to have more than 255 CSS rule types?
static const uintptr_t kMaxRuleType = UINT8_MAX;
static uintptr_t CastToUint(css::Rule* aPtr) {
return reinterpret_cast<uintptr_t>(aPtr);
}
static css::Rule* CastToPtr(uintptr_t aInt) {
MOZ_ASSERT(aInt > kMaxRuleType);
return reinterpret_cast<css::Rule*>(aInt);
}
template <typename Func>
void EnumerateInstantiatedRules(Func aCallback);
void DropAllRules();
bool IsReadOnly() const;
// mStyleSheet may be nullptr when it drops the reference to us.
StyleSheet* mStyleSheet = nullptr;
// mParentRule is nullptr if it isn't a nested rule list.
css::GroupRule* mParentRule = nullptr;
RefPtr<ServoCssRules> mRawRules;
// Array stores either a number indicating rule type, or a pointer to
// css::Rule. If the value is less than kMaxRuleType, the given rule
// instance has not been constructed, and the value means the type
// of the rule. Otherwise, it is a pointer.
nsTArray<uintptr_t> mRules;
};
} // namespace mozilla
#endif // mozilla_ServoCSSRuleList_h