Index: chromecast/browser/cast_media_blocker.h |
diff --git a/chromecast/browser/cast_media_blocker.h b/chromecast/browser/cast_media_blocker.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..35c438c6debd36483d43df1d25b7ae88fb915b8c |
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+++ b/chromecast/browser/cast_media_blocker.h |
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+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_ |
+#define CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_ |
+ |
+#include "base/macros.h" |
+#include "content/public/browser/web_contents_observer.h" |
+ |
+namespace content { |
+class WebContents; |
+} // namespace content |
+ |
+namespace chromecast { |
+namespace shell { |
+ |
+// This class implements a blocking mode for web applications and is used in |
+// Chromecast internal code. |
+class CastMediaBlocker : public content::WebContentsObserver { |
+ public: |
+ explicit CastMediaBlocker(content::WebContents* web_contents); |
+ ~CastMediaBlocker() override; |
+ |
+ // Sets if the web contents is allowed to play media or not. If media is |
+ // unblocked, previously suspended elements should begin playing again. |
+ void BlockMediaLoading(bool blocked); |
+ |
+ protected: |
+ bool media_loading_blocked() const { return state_ == BLOCKED; } |
+ |
+ // Blocks or unblocks the render process from loading new media |
+ // according to |media_loading_blocked_|. |
+ virtual void UpdateMediaBlockedState(); |
+ |
+ private: |
+ enum BlockState { |
+ BLOCKED, // All media playback should be blocked. |
+ UNBLOCKING, // Media playback should be resumed at next oppurtunity. |
+ UNBLOCKED, // Media playback should not be blocked. |
+ }; |
+ |
+ // content::WebContentsObserver implementation: |
+ void MediaSessionStateChanged( |
+ bool is_controllable, |
+ bool is_suspended, |
+ const base::Optional<content::MediaMetadata>& metadata) override; |
+ |
+ // Whether or not media in the app can be controlled and if media is currently |
+ // suspended. These variables cache arguments from MediaSessionStateChanged(). |
+ bool controllable_; |
+ bool suspended_; |
+ |
+ BlockState state_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(CastMediaBlocker); |
+}; |
+ |
+} // namespace shell |
+} // namespace chromecast |
+ |
+#endif // CHROMECAST_BROWSER_CAST_MEDIA_BLOCKER_H_ |