/* -*- 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/. */ /* base class for all rule types in a CSS style sheet */ #include "Rule.h" #include "mozilla/css/GroupRule.h" #include "mozilla/dom/DocumentOrShadowRoot.h" #include "nsCCUncollectableMarker.h" #include "mozilla/dom/Document.h" #include "nsWrapperCacheInlines.h" using namespace mozilla; using namespace mozilla::dom; namespace mozilla { namespace css { NS_IMPL_CYCLE_COLLECTING_ADDREF(Rule) NS_IMPL_CYCLE_COLLECTING_RELEASE(Rule) NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Rule) NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY NS_INTERFACE_MAP_ENTRY(nsISupports) NS_INTERFACE_MAP_END NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(Rule) bool Rule::IsCCLeaf() const { return !PreservingWrapper(); } bool Rule::IsKnownLive() const { if (HasKnownLiveWrapper()) { return true; } StyleSheet* sheet = GetStyleSheet(); if (!sheet) { return false; } if (!sheet->IsKeptAliveByDocument()) { return false; } return nsCCUncollectableMarker::InGeneration( GetComposedDoc()->GetMarkedCCGeneration()); } NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Rule) return tmp->IsCCLeaf() || tmp->IsKnownLive(); NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Rule) // Please see documentation for nsCycleCollectionParticipant::CanSkip* for why // we need to check HasNothingToTrace here but not in the other two CanSkip // methods. return tmp->IsCCLeaf() || (tmp->IsKnownLive() && tmp->HasNothingToTrace(tmp)); NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Rule) return tmp->IsCCLeaf() || tmp->IsKnownLive(); NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END /* virtual */ void Rule::DropSheetReference() { mSheet = nullptr; } void Rule::SetCssText(const nsAString& aCssText) { // We used to throw for some rule types, but not all. Specifically, we did // not throw for StyleRule. Let's just always not throw. } Rule* Rule::GetParentRule() const { return mParentRule; } } // namespace css } // namespace mozilla