layout/style/CSSMediaRule.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/CSSMediaRule.h"
   8
   9 #include "mozilla/dom/CSSMediaRuleBinding.h"
  10 #include "mozilla/dom/MediaList.h"
  11 #include "mozilla/ServoBindings.h"
  12
  13 namespace mozilla::dom {
  14
  15 CSSMediaRule::CSSMediaRule(RefPtr<StyleMediaRule> aRawRule, StyleSheet* aSheet,
  16                            css::Rule* aParentRule, uint32_t aLine,
  17                            uint32_t aColumn)
  18     : ConditionRule(aSheet, aParentRule, aLine, aColumn),
  19       mRawRule(std::move(aRawRule)) {}
  20
  21 CSSMediaRule::~CSSMediaRule() {
  22   if (mMediaList) {
  23     mMediaList->SetStyleSheet(nullptr);
  24   }
  25 }
  26
  27 NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(CSSMediaRule, css::ConditionRule)
  28
  29 NS_IMPL_CYCLE_COLLECTION_CLASS(CSSMediaRule)
  30
  31 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(CSSMediaRule,
  32                                                 css::ConditionRule)
  33   if (tmp->mMediaList) {
  34     tmp->mMediaList->SetStyleSheet(nullptr);
  35     tmp->mMediaList = nullptr;
  36   }
  37 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
  38
  39 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CSSMediaRule,
  40                                                   css::ConditionRule)
  41   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaList)
  42 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
  43
  44 bool CSSMediaRule::IsCCLeaf() const {
  45   return ConditionRule::IsCCLeaf() && !mMediaList;
  46 }
  47
  48 /* virtual */
  49 void CSSMediaRule::DropSheetReference() {
  50   if (mMediaList) {
  51     mMediaList->SetStyleSheet(nullptr);
  52   }
  53   ConditionRule::DropSheetReference();
  54 }
  55
  56 void CSSMediaRule::SetRawAfterClone(RefPtr<StyleMediaRule> aRaw) {
  57   mRawRule = std::move(aRaw);
  58   if (mMediaList) {
  59     mMediaList->SetRawAfterClone(Servo_MediaRule_GetMedia(mRawRule).Consume());
  60     mMediaList->SetStyleSheet(nullptr);
  61     mMediaList->SetStyleSheet(GetStyleSheet());
  62   }
  63   css::ConditionRule::DidSetRawAfterClone();
  64 }
  65
  66 already_AddRefed<StyleLockedCssRules> CSSMediaRule::GetOrCreateRawRules() {
  67   return Servo_MediaRule_GetRules(mRawRule).Consume();
  68 }
  69
  70 StyleCssRuleType CSSMediaRule::Type() const { return StyleCssRuleType::Media; }
  71
  72 #ifdef DEBUG
  73 /* virtual */
  74 void CSSMediaRule::List(FILE* out, int32_t aIndent) const {
  75   nsAutoCString str;
  76   for (int32_t i = 0; i < aIndent; i++) {
  77     str.AppendLiteral("  ");
  78   }
  79   Servo_MediaRule_Debug(mRawRule, &str);
  80   fprintf_stderr(out, "%s\n", str.get());
  81 }
  82 #endif
  83
  84 void CSSMediaRule::GetConditionText(nsACString& aConditionText) {
  85   Media()->GetMediaText(aConditionText);
  86 }
  87
  88 /* virtual */
  89 void CSSMediaRule::GetCssText(nsACString& aCssText) const {
  90   Servo_MediaRule_GetCssText(mRawRule, &aCssText);
  91 }
  92
  93 /* virtual */ dom::MediaList* CSSMediaRule::Media() {
  94   if (!mMediaList) {
  95     mMediaList = new MediaList(Servo_MediaRule_GetMedia(mRawRule).Consume());
  96     mMediaList->SetStyleSheet(GetStyleSheet());
  97   }
  98   return mMediaList;
  99 }
 100
 101 /* virtual */
 102 size_t CSSMediaRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
 103   // TODO Implement this!
 104   return aMallocSizeOf(this);
 105 }
 106
 107 /* virtual */
 108 JSObject* CSSMediaRule::WrapObject(JSContext* aCx,
 109                                    JS::Handle<JSObject*> aGivenProto) {
 110   return CSSMediaRule_Binding::Wrap(aCx, this, aGivenProto);
 111 }
 112
 113 }  // namespace mozilla::dom