Support text track selection in video controls

third_party/WebKit/Source/core/html/shadow/MediaControlElements.h

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 16 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef MediaControlElements_h
 #define MediaControlElements_h
 
 #include "core/html/shadow/MediaControlElementTypes.h"
 
 namespace blink {
 
+class TextTrack;
+
 // ----------------------------
 
 class MediaControlPanelElement final : public MediaControlDivElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlPanelElement> create(MediaControls&);
 
     void setIsDisplayed(bool);
 
     void makeOpaque();
     void makeTransparent();
@@ skipping 92 matching lines @@
     void updateDisplayType() override;
 
 private:
     explicit MediaControlToggleClosedCaptionsButtonElement(MediaControls&);
 
     void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
 
+class MediaControlTextTrackListElement final : public MediaControlDivElement {
+public:
+    static PassRefPtrWillBeRawPtr<MediaControlTextTrackListElement> create(MediaControls&);
+
+    bool willRespondToMouseClickEvents() override { return true; }
+
+    void changeVisibility(bool);

[philipj_slow, 2016/03/01 13:01:16]

The meaning of this bool argument isn't obvious, and is the opposite of what I
would guess. Just show() and hide() would be OK, or setVisible(bool) with the
opposite meaning compared to now would work if you think the if (x) { show(); }
else { hide(); } is going to be ugly.

[srivats, 2016/03/30 00:46:43]

Changed it to setVisible. I can change it to hide and show if this still doesn't
work.

+
+private:
+    explicit MediaControlTextTrackListElement(MediaControls&);
+
+    void defaultEventHandler(Event*) override;
+
+    void refreshTextTrackListMenu();
+
+    String getTextTrackLabel(TextTrack*);

[philipj_slow, 2016/03/01 13:01:16]

Can you document here and below that null is allowed and what it means?

[srivats, 2016/03/30 00:46:43]

Done.

+    PassRefPtrWillBeRawPtr<Element> createTextTrackListItem(TextTrack*);
+
+    void showTextTrackAtIndex(unsigned);
+    void disableShowingTextTracks();
+};
+
+// ----------------------------
+
 class MediaControlTimelineElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlTimelineElement> create(MediaControls&);
 
     bool willRespondToMouseClickEvents() override;
 
     // FIXME: An "earliest possible position" will be needed once that concept
     // is supported by HTMLMediaElement, see https://crbug.com/137275
     void setPosition(double);
     void setDuration(double);
@@ skipping 93 matching lines @@
 public:
     static PassRefPtrWillBeRawPtr<MediaControlCurrentTimeDisplayElement> create(MediaControls&);
 
 private:
     explicit MediaControlCurrentTimeDisplayElement(MediaControls&);
 };
 
 } // namespace blink
 
 #endif // MediaControlElements_h