Support text track selection in video controls

Source/core/html/shadow/MediaControls.cpp

 /*
  * 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 41 matching lines @@
     , m_mediaElement(&mediaElement)
     , m_panel(nullptr)
     , m_overlayPlayButton(nullptr)
     , m_overlayEnclosure(nullptr)
     , m_playButton(nullptr)
     , m_currentTimeDisplay(nullptr)
     , m_timeline(nullptr)
     , m_muteButton(nullptr)
     , m_volumeSlider(nullptr)
     , m_toggleClosedCaptionsButton(nullptr)
+    , m_textTrackListContainer(nullptr)
+    , m_textTrackList(nullptr)
     , m_fullScreenButton(nullptr)
     , m_castButton(nullptr)
     , m_overlayCastButton(nullptr)
     , m_durationDisplay(nullptr)
     , m_enclosure(nullptr)
     , m_hideMediaControlsTimer(this, &MediaControls::hideMediaControlsTimerFired)
     , m_hideTimerBehaviorFlags(IgnoreNone)
     , m_isMouseOverControls(false)
     , m_isPausedForScrubbing(false)
 {
@@ skipping 16 matching lines @@
 // | \-MediaControlCastButtonElement                   (-internal-media-controls-overlay-cast-button)
 // \-MediaControlPanelEnclosureElement                 (-webkit-media-controls-enclosure)
 //   \-MediaControlPanelElement                        (-webkit-media-controls-panel)
 //     +-MediaControlPlayButtonElement                 (-webkit-media-controls-play-button)
 //     +-MediaControlTimelineElement                   (-webkit-media-controls-timeline)
 //     +-MediaControlCurrentTimeDisplayElement         (-webkit-media-controls-current-time-display)
 //     +-MediaControlTimeRemainingDisplayElement       (-webkit-media-controls-time-remaining-display)
 //     +-MediaControlMuteButtonElement                 (-webkit-media-controls-mute-button)
 //     +-MediaControlVolumeSliderElement               (-webkit-media-controls-volume-slider)
 //     +-MediaControlToggleClosedCaptionsButtonElement (-webkit-media-controls-toggle-closed-captions-button)
+//     +-MediaControlTextTrackListContainerElement     (-webkit-media-controls-text-track-list-container)
+//     +-MediaControlTextTrackListElement              (-webkit-media-controls-text-track-list)
 //     +-MediaControlCastButtonElement                 (-internal-media-controls-cast-button)
 //     \-MediaControlFullscreenButtonElement           (-webkit-media-controls-fullscreen-button)
 void MediaControls::initializeControls()
 {
     RefPtrWillBeRawPtr<MediaControlOverlayEnclosureElement> overlayEnclosure = MediaControlOverlayEnclosureElement::create(*this);
 
     if (document().settings() && document().settings()->mediaControlsOverlayPlayButtonEnabled()) {
         RefPtrWillBeRawPtr<MediaControlOverlayPlayButtonElement> overlayPlayButton = MediaControlOverlayPlayButtonElement::create(*this);
         m_overlayPlayButton = overlayPlayButton.get();
         overlayEnclosure->appendChild(overlayPlayButton.release());
@@ skipping 33 matching lines @@
     panel->appendChild(muteButton.release());
 
     RefPtrWillBeRawPtr<MediaControlVolumeSliderElement> slider = MediaControlVolumeSliderElement::create(*this);
     m_volumeSlider = slider.get();
     panel->appendChild(slider.release());
 
     RefPtrWillBeRawPtr<MediaControlToggleClosedCaptionsButtonElement> toggleClosedCaptionsButton = MediaControlToggleClosedCaptionsButtonElement::create(*this);
     m_toggleClosedCaptionsButton = toggleClosedCaptionsButton.get();
     panel->appendChild(toggleClosedCaptionsButton.release());
 
+    RefPtrWillBeRawPtr<MediaControlTextTrackListContainerElement> textTrackListContainer =
+        MediaControlTextTrackListContainerElement::create(*this);
+    m_textTrackListContainer = textTrackListContainer.get();
+    RefPtrWillBeRawPtr<MediaControlTextTrackListElement> textTrackList =
+        MediaControlTextTrackListElement::create(*this);
+    m_textTrackList = textTrackList.get();
+    m_textTrackListContainer->appendChild(textTrackList.release());
+    panel->appendChild(textTrackListContainer.release());
+
     RefPtrWillBeRawPtr<MediaControlCastButtonElement> castButton = MediaControlCastButtonElement::create(*this, false);
     m_castButton = castButton.get();
     panel->appendChild(castButton.release());
 
     RefPtrWillBeRawPtr<MediaControlFullscreenButtonElement> fullscreenButton = MediaControlFullscreenButtonElement::create(*this);
     m_fullScreenButton = fullscreenButton.get();
     panel->appendChild(fullscreenButton.release());
 
     m_panel = panel.get();
     enclosure->appendChild(panel.release());
@@ skipping 186 matching lines @@
 }
 
 void MediaControls::refreshClosedCaptionsButtonVisibility()
 {
     if (mediaElement().hasClosedCaptions())
         m_toggleClosedCaptionsButton->show();
     else
         m_toggleClosedCaptionsButton->hide();
 }
 
+void MediaControls::toggleTextTrackList()
+{
+    if (!mediaElement().hasClosedCaptions())
+        return;
+
+    bool isTrackListVisible = m_textTrackListContainer->isVisible();
+    // Media controls panel has overflow set to hidden. To display track list,
+    // overflow has to be set to visible.
+    m_panel->setInlineStyleProperty(CSSPropertyOverflow, CSSValueVisible, isTrackListVisible);
+    if (isTrackListVisible) {
+        m_textTrackListContainer->hide();
+        m_textTrackList->hide();
+    } else {
+        m_textTrackListContainer->show();
+        m_textTrackList->refreshTextTrackListMenu();
+        m_textTrackList->show();
+    }
+}
+
 static Element* elementFromCenter(Element& element)
 {
     RefPtrWillBeRawPtr<ClientRect> clientRect = element.getBoundingClientRect();
     int centerX = static_cast<int>((clientRect->left() + clientRect->right()) / 2);
     int centerY = static_cast<int>((clientRect->top() + clientRect->bottom()) / 2);
 
     return element.document().elementFromPoint(centerX , centerY);
 }
 
 void MediaControls::tryShowOverlayCastButton()
@@ skipping 162 matching lines @@
     visitor->trace(m_toggleClosedCaptionsButton);
     visitor->trace(m_fullScreenButton);
     visitor->trace(m_durationDisplay);
     visitor->trace(m_enclosure);
     visitor->trace(m_castButton);
     visitor->trace(m_overlayCastButton);
     HTMLDivElement::trace(visitor);
 }
 
 }