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 /* base class for representation of media lists */
8
9 #include "mozilla/dom/MediaList.h"
10
11 #include "mozAutoDocUpdate.h"
12 #include "mozilla/dom/Document.h"
13 #include "mozilla/dom/MediaListBinding.h"
14 #include "mozilla/ServoBindings.h"
15 #include "mozilla/ServoStyleSet.h"
16 #include "mozilla/StyleSheetInlines.h"
17
18 namespace mozilla {
19 namespace dom {
20
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaList)21 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaList)
22 NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
23 NS_INTERFACE_MAP_ENTRY(nsISupports)
24 NS_INTERFACE_MAP_END
25
26 NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaList)
27 NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaList)
28
29 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(MediaList)
30
31 JSObject* MediaList::WrapObject(JSContext* aCx,
32 JS::Handle<JSObject*> aGivenProto) {
33 return MediaList_Binding::Wrap(aCx, this, aGivenProto);
34 }
35
SetStyleSheet(StyleSheet * aSheet)36 void MediaList::SetStyleSheet(StyleSheet* aSheet) {
37 MOZ_ASSERT(aSheet == mStyleSheet || !aSheet || !mStyleSheet,
38 "Multiple style sheets competing for one media list");
39 mStyleSheet = aSheet;
40 }
41
GetParentObject() const42 nsISupports* MediaList::GetParentObject() const { return mStyleSheet; }
43
44 template <typename Func>
DoMediaChange(Func aCallback,ErrorResult & aRv)45 void MediaList::DoMediaChange(Func aCallback, ErrorResult& aRv) {
46 if (IsReadOnly()) {
47 return;
48 }
49
50 if (mStyleSheet) {
51 mStyleSheet->WillDirty();
52 }
53
54 aCallback(aRv);
55 if (aRv.Failed()) {
56 return;
57 }
58
59 if (mStyleSheet) {
60 // FIXME(emilio): We should discern between "owned by a rule" (as in @media)
61 // and "owned by a sheet" (as in <style media>), and then pass something
62 // meaningful here.
63 mStyleSheet->RuleChanged(nullptr, StyleRuleChangeKind::Generic);
64 }
65 }
66
Clone()67 already_AddRefed<MediaList> MediaList::Clone() {
68 RefPtr<MediaList> clone =
69 new MediaList(Servo_MediaList_DeepClone(mRawList).Consume());
70 return clone.forget();
71 }
72
MediaList()73 MediaList::MediaList() : mRawList(Servo_MediaList_Create().Consume()) {}
74
MediaList(const nsACString & aMedia,CallerType aCallerType)75 MediaList::MediaList(const nsACString& aMedia, CallerType aCallerType)
76 : MediaList() {
77 SetTextInternal(aMedia, aCallerType);
78 }
79
GetText(nsACString & aMediaText)80 void MediaList::GetText(nsACString& aMediaText) {
81 Servo_MediaList_GetText(mRawList, &aMediaText);
82 }
83
84 /* static */
Create(const nsACString & aMedia,CallerType aCallerType)85 already_AddRefed<MediaList> MediaList::Create(const nsACString& aMedia,
86 CallerType aCallerType) {
87 RefPtr<MediaList> mediaList = new MediaList(aMedia, aCallerType);
88 return mediaList.forget();
89 }
90
SetText(const nsACString & aMediaText)91 void MediaList::SetText(const nsACString& aMediaText) {
92 if (IsReadOnly()) {
93 return;
94 }
95
96 SetTextInternal(aMediaText, CallerType::NonSystem);
97 }
98
GetMediaText(nsACString & aMediaText)99 void MediaList::GetMediaText(nsACString& aMediaText) { GetText(aMediaText); }
100
SetTextInternal(const nsACString & aMediaText,CallerType aCallerType)101 void MediaList::SetTextInternal(const nsACString& aMediaText,
102 CallerType aCallerType) {
103 Servo_MediaList_SetText(mRawList, &aMediaText, aCallerType);
104 }
105
Length()106 uint32_t MediaList::Length() { return Servo_MediaList_GetLength(mRawList); }
107
IndexedGetter(uint32_t aIndex,bool & aFound,nsACString & aReturn)108 void MediaList::IndexedGetter(uint32_t aIndex, bool& aFound,
109 nsACString& aReturn) {
110 aFound = Servo_MediaList_GetMediumAt(mRawList, aIndex, &aReturn);
111 if (!aFound) {
112 aReturn.SetIsVoid(true);
113 }
114 }
115
Delete(const nsACString & aOldMedium,ErrorResult & aRv)116 void MediaList::Delete(const nsACString& aOldMedium, ErrorResult& aRv) {
117 MOZ_ASSERT(!IsReadOnly());
118 if (Servo_MediaList_DeleteMedium(mRawList, &aOldMedium)) {
119 return;
120 }
121 aRv.ThrowNotFoundError("Medium not in list");
122 }
123
Matches(const Document & aDocument) const124 bool MediaList::Matches(const Document& aDocument) const {
125 const RawServoStyleSet* rawSet =
126 aDocument.StyleSetForPresShellOrMediaQueryEvaluation()->RawSet();
127 MOZ_ASSERT(rawSet, "The RawServoStyleSet should be valid!");
128 return Servo_MediaList_Matches(mRawList, rawSet);
129 }
130
Append(const nsACString & aNewMedium,ErrorResult & aRv)131 void MediaList::Append(const nsACString& aNewMedium, ErrorResult& aRv) {
132 MOZ_ASSERT(!IsReadOnly());
133 if (aNewMedium.IsEmpty()) {
134 // XXXbz per spec there should not be an exception here, as far as
135 // I can tell...
136 aRv.ThrowNotFoundError("Empty medium");
137 return;
138 }
139 Servo_MediaList_AppendMedium(mRawList, &aNewMedium);
140 }
141
SetMediaText(const nsACString & aMediaText)142 void MediaList::SetMediaText(const nsACString& aMediaText) {
143 DoMediaChange([&](ErrorResult& aRv) { SetText(aMediaText); }, IgnoreErrors());
144 }
145
Item(uint32_t aIndex,nsACString & aReturn)146 void MediaList::Item(uint32_t aIndex, nsACString& aReturn) {
147 bool dummy;
148 IndexedGetter(aIndex, dummy, aReturn);
149 }
150
DeleteMedium(const nsACString & aOldMedium,ErrorResult & aRv)151 void MediaList::DeleteMedium(const nsACString& aOldMedium, ErrorResult& aRv) {
152 DoMediaChange([&](ErrorResult& aRv) { Delete(aOldMedium, aRv); }, aRv);
153 }
154
AppendMedium(const nsACString & aNewMedium,ErrorResult & aRv)155 void MediaList::AppendMedium(const nsACString& aNewMedium, ErrorResult& aRv) {
156 DoMediaChange([&](ErrorResult& aRv) { Append(aNewMedium, aRv); }, aRv);
157 }
158
159 MOZ_DEFINE_MALLOC_SIZE_OF(ServoMediaListMallocSizeOf)
MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoMediaListMallocEnclosingSizeOf)160 MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoMediaListMallocEnclosingSizeOf)
161
162 size_t MediaList::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
163 size_t n = 0;
164 n += Servo_MediaList_SizeOfIncludingThis(ServoMediaListMallocSizeOf,
165 ServoMediaListMallocEnclosingSizeOf,
166 mRawList);
167 return n;
168 }
169
IsReadOnly() const170 bool MediaList::IsReadOnly() const {
171 return mStyleSheet && mStyleSheet->IsReadOnly();
172 }
173
174 } // namespace dom
175 } // namespace mozilla
176