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// 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_