зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
2.4 KiB
C++
99 строки
2.4 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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/* base class for all rule types in a CSS style sheet */
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#include "Rule.h"
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#include "mozilla/css/GroupRule.h"
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#include "mozilla/dom/DocumentOrShadowRoot.h"
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#include "nsCCUncollectableMarker.h"
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#include "nsIDocument.h"
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#include "nsWrapperCacheInlines.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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namespace mozilla {
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namespace css {
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NS_IMPL_CYCLE_COLLECTING_ADDREF(Rule)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(Rule)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Rule)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Rule)
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bool
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Rule::IsCCLeaf() const
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{
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return !PreservingWrapper();
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}
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bool
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Rule::IsKnownLive() const
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{
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if (HasKnownLiveWrapper()) {
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return true;
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}
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StyleSheet* sheet = GetStyleSheet();
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if (!sheet) {
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return false;
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}
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if (!sheet->IsKeptAliveByDocument()) {
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return false;
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}
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return nsCCUncollectableMarker::InGeneration(
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GetComposedDoc()->GetMarkedCCGeneration());
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}
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Rule)
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return tmp->IsCCLeaf() || tmp->IsKnownLive();
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Rule)
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// Please see documentation for nsCycleCollectionParticipant::CanSkip* for why
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// we need to check HasNothingToTrace here but not in the other two CanSkip
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// methods.
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return tmp->IsCCLeaf() ||
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(tmp->IsKnownLive() && tmp->HasNothingToTrace(tmp));
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Rule)
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return tmp->IsCCLeaf() || tmp->IsKnownLive();
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NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
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/* virtual */ void
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Rule::SetStyleSheet(StyleSheet* aSheet)
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{
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// We don't reference count this up reference. The style sheet
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// will tell us when it's going away or when we're detached from
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// it.
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mSheet = aSheet;
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}
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void
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Rule::SetCssText(const nsAString& aCssText)
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{
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// We used to throw for some rule types, but not all. Specifically, we did
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// not throw for StyleRule. Let's just always not throw.
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}
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Rule*
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Rule::GetParentRule() const
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{
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return mParentRule;
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}
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} // namespace css
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} // namespace mozilla
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