| // Copyright 2017 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef COBALT_DOM_VIDEO_TRACK_LIST_H_ |
| #define COBALT_DOM_VIDEO_TRACK_LIST_H_ |
| |
| #include <string> |
| |
| #include "base/memory/ref_counted.h" |
| #include "cobalt/dom/html_media_element.h" |
| #include "cobalt/dom/track_list_base.h" |
| #include "cobalt/dom/video_track.h" |
| #include "cobalt/script/environment_settings.h" |
| #include "cobalt/script/wrappable.h" |
| |
| namespace cobalt { |
| namespace dom { |
| |
| // The VideoTrackList interface holds a list of video tracks |
| // https://www.w3.org/TR/html51/semantics-embedded-content.html#videotracklist-videotracklist |
| class VideoTrackList : public TrackListBase<VideoTrack> { |
| public: |
| // Custom, not in any spec. |
| // |
| VideoTrackList(script::EnvironmentSettings* settings, |
| HTMLMediaElement* media_element) |
| : TrackListBase<VideoTrack>(settings, media_element) {} |
| |
| // Web API: VideoTrackList |
| // |
| using TrackListBase<VideoTrack>::length; |
| using TrackListBase<VideoTrack>::AnonymousIndexedGetter; |
| using TrackListBase<VideoTrack>::GetTrackById; |
| |
| int32 selected_index() const { |
| for (uint32 i = 0; i < length(); ++i) { |
| scoped_refptr<VideoTrack> video_track = AnonymousIndexedGetter(i); |
| if (video_track->selected()) { |
| return static_cast<int32>(i); |
| } |
| } |
| |
| return -1; |
| } |
| |
| // Custom, not in any spec. |
| // |
| // Called when the VideoTrack identified by |id| is selected. This function |
| // clears the selected flags of other VideoTracks if there is any. |
| void OnTrackSelected(const std::string& id) { |
| for (uint32 i = 0; i < length(); ++i) { |
| scoped_refptr<VideoTrack> video_track = AnonymousIndexedGetter(i); |
| |
| if (video_track->id() != id) { |
| video_track->deselect(); |
| } else { |
| DCHECK(video_track->selected()); |
| } |
| } |
| } |
| |
| DEFINE_WRAPPABLE_TYPE(VideoTrackList); |
| }; |
| |
| } // namespace dom |
| } // namespace cobalt |
| |
| #endif // COBALT_DOM_VIDEO_TRACK_LIST_H_ |