Support text track selection in video controls

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 345 matching lines @@
     , m_playingRemotely(false)
 #if ENABLE(OILPAN)
     , m_isFinalizing(false)
     , m_closeMediaSourceWhenFinalizing(false)
 #endif
     , m_initialPlayWithoutUserGestures(false)
     , m_autoplayMediaCounted(false)
     , m_audioTracks(AudioTrackList::create(*this))
     , m_videoTracks(VideoTrackList::create(*this))
     , m_textTracks(nullptr)
+    , m_performAutomaticTextTrackSelection(true)
 #if ENABLE(WEB_AUDIO)
     , m_audioSourceNode(nullptr)
 #endif
 {
     ASSERT(RuntimeEnabledFeatures::mediaEnabled());
 
     WTF_LOG(Media, "HTMLMediaElement::HTMLMediaElement(%p)", this);
 
     if (document.settings() && document.settings()->mediaPlaybackRequiresUserGesture())
         m_userGestureRequiredForPlay = true;
@@ skipping 784 matching lines @@
     // Mark this track as "configured" so configureTextTracks won't change the mode again.
     if (track->trackType() == TextTrack::TrackElement)
         track->setHasBeenConfigured(true);
 
     configureTextTrackDisplay(AssumeVisibleChange);
 
     ASSERT(textTracks()->contains(track));
     textTracks()->scheduleChangeEvent();
 }
 
+void HTMLMediaElement::setAutomaticTextTrackSelection(bool enabled)
+{
+    m_performAutomaticTextTrackSelection = enabled;
+}
+
 bool HTMLMediaElement::isSafeToLoadURL(const KURL& url, InvalidURLAction actionIfInvalid)
 {
     if (!url.isValid()) {
         WTF_LOG(Media, "HTMLMediaElement::isSafeToLoadURL(%p, %s) -> FALSE because url is invalid", this, urlForLoggingMedia(url).utf8().data());
         return false;
     }
 
     LocalFrame* frame = document().frame();
     if (!frame || !document().securityOrigin()->canDisplay(url)) {
         if (actionIfInvalid == Complain)
@@ skipping 1294 matching lines @@
     size_t index = m_textTracksWhenResourceSelectionBegan.find(textTrack.get());
     if (index != kNotFound)
         m_textTracksWhenResourceSelectionBegan.remove(index);
 }
 
 void HTMLMediaElement::honorUserPreferencesForAutomaticTextTrackSelection()
 {
     if (!m_textTracks || !m_textTracks->length())
         return;
 
+    if (!m_performAutomaticTextTrackSelection)
+        return;
+
     AutomaticTrackSelection::Configuration configuration;
     if (m_processingPreferenceChange)
         configuration.disableCurrentlyEnabledTracks = true;
     if (m_closedCaptionsVisible)
         configuration.forceEnableSubtitleOrCaptionTrack = true;
 
     AutomaticTrackSelection trackSelection(configuration);
     trackSelection.perform(*m_textTracks);
 
     textTracksChanged();
@@ skipping 1179 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!visitor->isHeapObjectAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(nullptr);
 }
 #endif
 
 }