1 files changed, 175 insertions, 0 deletions
diff --git a/layout/style/MediaList.cpp b/layout/style/MediaList.cpp
new file mode 100644
index 0000000000..1b795f276f
--- /dev/null
+++ b/layout/style/MediaList.cpp
@@ -0,0 +1,175 @@
+/* -*- 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 representation of media lists */
+
+#include "mozilla/dom/MediaList.h"
+
+#include "mozAutoDocUpdate.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/MediaListBinding.h"
+#include "mozilla/ServoBindings.h"
+#include "mozilla/ServoStyleSet.h"
+#include "mozilla/StyleSheetInlines.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaList)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaList)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaList)
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(MediaList)
+
+JSObject* MediaList::WrapObject(JSContext* aCx,
+                                JS::Handle<JSObject*> aGivenProto) {
+  return MediaList_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void MediaList::SetStyleSheet(StyleSheet* aSheet) {
+  MOZ_ASSERT(aSheet == mStyleSheet || !aSheet || !mStyleSheet,
+             "Multiple style sheets competing for one media list");
+  mStyleSheet = aSheet;
+}
+
+nsISupports* MediaList::GetParentObject() const { return mStyleSheet; }
+
+template <typename Func>
+void MediaList::DoMediaChange(Func aCallback, ErrorResult& aRv) {
+  if (IsReadOnly()) {
+    return;
+  }
+
+  if (mStyleSheet) {
+    mStyleSheet->WillDirty();
+  }
+
+  aCallback(aRv);
+  if (aRv.Failed()) {
+    return;
+  }
+
+  if (mStyleSheet) {
+    // FIXME(emilio): We should discern between "owned by a rule" (as in @media)
+    // and "owned by a sheet" (as in <style media>), and then pass something
+    // meaningful here.
+    mStyleSheet->RuleChanged(nullptr, StyleRuleChangeKind::Generic);
+  }
+}
+
+already_AddRefed<MediaList> MediaList::Clone() {
+  RefPtr<MediaList> clone =
+      new MediaList(Servo_MediaList_DeepClone(mRawList).Consume());
+  return clone.forget();
+}
+
+MediaList::MediaList() : mRawList(Servo_MediaList_Create().Consume()) {}
+
+MediaList::MediaList(const nsACString& aMedia, CallerType aCallerType)
+    : MediaList() {
+  SetTextInternal(aMedia, aCallerType);
+}
+
+void MediaList::GetText(nsACString& aMediaText) {
+  Servo_MediaList_GetText(mRawList, &aMediaText);
+}
+
+/* static */
+already_AddRefed<MediaList> MediaList::Create(const nsACString& aMedia,
+                                              CallerType aCallerType) {
+  RefPtr<MediaList> mediaList = new MediaList(aMedia, aCallerType);
+  return mediaList.forget();
+}
+
+void MediaList::SetText(const nsACString& aMediaText) {
+  if (IsReadOnly()) {
+    return;
+  }
+
+  SetTextInternal(aMediaText, CallerType::NonSystem);
+}
+
+void MediaList::GetMediaText(nsACString& aMediaText) { GetText(aMediaText); }
+
+void MediaList::SetTextInternal(const nsACString& aMediaText,
+                                CallerType aCallerType) {
+  Servo_MediaList_SetText(mRawList, &aMediaText, aCallerType);
+}
+
+uint32_t MediaList::Length() { return Servo_MediaList_GetLength(mRawList); }
+
+void MediaList::IndexedGetter(uint32_t aIndex, bool& aFound,
+                              nsACString& aReturn) {
+  aFound = Servo_MediaList_GetMediumAt(mRawList, aIndex, &aReturn);
+  if (!aFound) {
+    aReturn.SetIsVoid(true);
+  }
+}
+
+void MediaList::Delete(const nsACString& aOldMedium, ErrorResult& aRv) {
+  MOZ_ASSERT(!IsReadOnly());
+  if (Servo_MediaList_DeleteMedium(mRawList, &aOldMedium)) {
+    return;
+  }
+  aRv.ThrowNotFoundError("Medium not in list");
+}
+
+bool MediaList::Matches(const Document& aDocument) const {
+  const RawServoStyleSet* rawSet =
+      aDocument.StyleSetForPresShellOrMediaQueryEvaluation()->RawSet();
+  MOZ_ASSERT(rawSet, "The RawServoStyleSet should be valid!");
+  return Servo_MediaList_Matches(mRawList, rawSet);
+}
+
+void MediaList::Append(const nsACString& aNewMedium, ErrorResult& aRv) {
+  MOZ_ASSERT(!IsReadOnly());
+  if (aNewMedium.IsEmpty()) {
+    // XXXbz per spec there should not be an exception here, as far as
+    // I can tell...
+    aRv.ThrowNotFoundError("Empty medium");
+    return;
+  }
+  Servo_MediaList_AppendMedium(mRawList, &aNewMedium);
+}
+
+void MediaList::SetMediaText(const nsACString& aMediaText) {
+  DoMediaChange([&](ErrorResult& aRv) { SetText(aMediaText); }, IgnoreErrors());
+}
+
+void MediaList::Item(uint32_t aIndex, nsACString& aReturn) {
+  bool dummy;
+  IndexedGetter(aIndex, dummy, aReturn);
+}
+
+void MediaList::DeleteMedium(const nsACString& aOldMedium, ErrorResult& aRv) {
+  DoMediaChange([&](ErrorResult& aRv) { Delete(aOldMedium, aRv); }, aRv);
+}
+
+void MediaList::AppendMedium(const nsACString& aNewMedium, ErrorResult& aRv) {
+  DoMediaChange([&](ErrorResult& aRv) { Append(aNewMedium, aRv); }, aRv);
+}
+
+MOZ_DEFINE_MALLOC_SIZE_OF(ServoMediaListMallocSizeOf)
+MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoMediaListMallocEnclosingSizeOf)
+
+size_t MediaList::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
+  size_t n = 0;
+  n += Servo_MediaList_SizeOfIncludingThis(ServoMediaListMallocSizeOf,
+                                           ServoMediaListMallocEnclosingSizeOf,
+                                           mRawList);
+  return n;
+}
+
+bool MediaList::IsReadOnly() const {
+  return mStyleSheet && mStyleSheet->IsReadOnly();
+}
+
+}  // namespace dom
+}  // namespace mozilla