Media Controls: delegate 'volumechange' and 'focusin' handling to an EventListener.

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

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
 
 #ifndef MediaControls_h
 #define MediaControls_h
 
 #include "core/html/HTMLDivElement.h"
 #include "core/html/shadow/MediaControlElements.h"
 
 namespace blink {
 
 class Event;
+class MediaControlsMediaEventListener;
 class MediaControlsWindowEventListener;
 
 class CORE_EXPORT MediaControls final : public HTMLDivElement {
  public:
   static MediaControls* create(HTMLMediaElement&);
 
   HTMLMediaElement& mediaElement() const { return *m_mediaElement; }
 
   void reset();
 
   void show();
   void hide();
   bool isVisible() const;
 
   void playbackStarted();
   void playbackProgressed();
   void playbackStopped();
 
   void beginScrubbing();
   void endScrubbing();
 
   void updateCurrentTimeDisplay();
 
-  void updateVolume();
-
   void changedClosedCaptionsVisibility();
   void refreshClosedCaptionsButtonVisibility();
   void toggleTextTrackList();
   void showTextTrackAtIndex(unsigned indexToEnable);
   void disableShowingTextTracks();
 
   void enteredFullscreen();
   void exitedFullscreen();
 
   void startedCasting();
   void stoppedCasting();
   void refreshCastButtonVisibility();
   void showOverlayCastButtonIfNeeded();
   // Update cast button visibility, but don't try to update our panel
   // button visibility for space.
   void refreshCastButtonVisibilityWithoutUpdate();
 
   void setAllowHiddenVolumeControls(bool);
 
-  void mediaElementFocused();
-
   // Returns the layout object for the part of the controls that should be
   // used for overlap checking during text track layout. May be null.
   LayoutObject* layoutObjectForTextTrackLayout();
 
   // Return the internal elements, which is used by registering clicking
   // EventHandlers from MediaControlsWindowEventListener.
   MediaControlPanelElement* panelElement() { return m_panel; }
   MediaControlTimelineElement* timelineElement() { return m_timeline; }
   MediaControlCastButtonElement* castButtonElement() { return m_castButton; }
   MediaControlVolumeSliderElement* volumeSliderElement() {
     return m_volumeSlider;
   }
 
   // Notify us that our controls enclosure has changed width.
   void notifyPanelWidthChanged(const LayoutUnit& newWidth);
 
   // Notify us that the media element's network state has changed.
   void networkStateChanged();
 
   void toggleOverflowMenu();
 
   bool overflowMenuVisible();
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
+  friend class MediaControlsMediaEventListener;
   friend class MediaControlsTest;
 
   void invalidate(Element*);
 
   class BatchedControlUpdate;
 
   explicit MediaControls(HTMLMediaElement&);
 
   void initializeControls();
 
@@ skipping 23 matching lines @@
   // Hide elements that don't fit, and show those things that we want which
   // do fit.  This requires that m_panelWidth is current.
   void computeWhichControlsFit();
 
   // Node
   bool isMediaControls() const override { return true; }
   bool willRespondToMouseMoveEvents() override { return true; }
   void defaultEventHandler(Event*) override;
   bool containsRelatedTarget(Event*);
 
+  // Methods called by MediaControlsMediaEventListener.
+  void onVolumeChange();
+  void onFocusIn();
+
   Member<HTMLMediaElement> m_mediaElement;
 
   // Media control elements.
   Member<MediaControlOverlayEnclosureElement> m_overlayEnclosure;
   Member<MediaControlOverlayPlayButtonElement> m_overlayPlayButton;
   Member<MediaControlCastButtonElement> m_overlayCastButton;
   Member<MediaControlPanelEnclosureElement> m_enclosure;
   Member<MediaControlPanelElement> m_panel;
   Member<MediaControlPlayButtonElement> m_playButton;
   Member<MediaControlTimelineElement> m_timeline;
   Member<MediaControlCurrentTimeDisplayElement> m_currentTimeDisplay;
   Member<MediaControlTimeRemainingDisplayElement> m_durationDisplay;
   Member<MediaControlMuteButtonElement> m_muteButton;
   Member<MediaControlVolumeSliderElement> m_volumeSlider;
   Member<MediaControlToggleClosedCaptionsButtonElement>
       m_toggleClosedCaptionsButton;
   Member<MediaControlTextTrackListElement> m_textTrackList;
   Member<MediaControlOverflowMenuButtonElement> m_overflowMenu;
   Member<MediaControlOverflowMenuListElement> m_overflowList;
 
   Member<MediaControlCastButtonElement> m_castButton;
   Member<MediaControlFullscreenButtonElement> m_fullscreenButton;
   Member<MediaControlDownloadButtonElement> m_downloadButton;
 
+  Member<MediaControlsMediaEventListener> m_mediaEventListener;
   Member<MediaControlsWindowEventListener> m_windowEventListener;
 
   Timer<MediaControls> m_hideMediaControlsTimer;
   unsigned m_hideTimerBehaviorFlags;
   bool m_isMouseOverControls : 1;
   bool m_isPausedForScrubbing : 1;
 
   Timer<MediaControls> m_panelWidthChangedTimer;
   int m_panelWidth;
 
   bool m_keepShowingUntilTimerFires : 1;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(MediaControls, isMediaControls());
 
 }  // namespace blink
 
 #endif