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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/196010">196010</a></dd>
<dt>Author</dt> <dd>eric.carlson@apple.com</dd>
<dt>Date</dt> <dd>2016-02-02 08:38:02 -0800 (Tue, 02 Feb 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>Allow ports to disable automatic text track selection
https://bugs.webkit.org/show_bug.cgi?id=153761
&lt;rdar://problem/24416768&gt;

Reviewed by Darin Adler.

Source/WebCore:

Test: media/track/track-manual-mode.html

* Modules/mediacontrols/MediaControlsHost.cpp:
(WebCore::MediaControlsHost::manualKeyword): New.
(WebCore::MediaControlsHost::captionDisplayMode): Support 'manual' mode.
* Modules/mediacontrols/MediaControlsHost.h:

* Modules/mediacontrols/mediaControlsApple.js:
(Controller.prototype.buildCaptionMenu): Check the 'off' item when in manual mode.

* html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::addTextTrack): Update m_captionDisplayMode when called for the first
  time so it is always correct. Set the track's manual selection mode as appropriate.
(WebCore::HTMLMediaElement::captionPreferencesChanged): Set each track's manual selection 
  mode as appropriate.

* html/track/TextTrack.cpp:
(WebCore::TextTrack::kind): Return 'subtitles' for forced tracks when in manual mode.
* html/track/TextTrack.h:

* html/track/TrackBase.h:
(WebCore::TrackBase::kind): Make virtual.

* page/CaptionUserPreferences.cpp:
(WebCore::CaptionUserPreferences::beginBlockingNotifications): New.
(WebCore::CaptionUserPreferences::endBlockingNotifications): Ditto.
(WebCore::CaptionUserPreferences::notify): Don't notify when blocked.
* page/CaptionUserPreferences.h:

* page/CaptionUserPreferencesMediaAF.cpp:
(WebCore::CaptionUserPreferencesMediaAF::CaptionUserPreferencesMediaAF): Set manual mode 
  when appropriate.
(WebCore::CaptionUserPreferencesMediaAF::captionDisplayMode): Check manual mode.
(WebCore::CaptionUserPreferencesMediaAF::setCaptionDisplayMode): Ditto.
(WebCore::CaptionUserPreferencesMediaAF::setPreferredLanguage): Ditto.
(WebCore::CaptionUserPreferencesMediaAF::textTrackSelectionScore): Return zero when in manual mode.
(WebCore::CaptionUserPreferencesMediaAF::sortedTrackListForMenu): Consider manual mode. Fix
  typos in logging.

* platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:
(WebCore::mediaDescriptionForKind): Return 'auxiliary' when in manual mode.

* testing/Internals.cpp:
(WebCore::Internals::setCaptionDisplayMode): Support manual mode.

LayoutTests:

* media/track/track-manual-mode-expected.txt: Added.
* media/track/track-manual-mode.html: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreModulesmediacontrolsMediaControlsHostcpp">trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp</a></li>
<li><a href="#trunkSourceWebCoreModulesmediacontrolsMediaControlsHosth">trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h</a></li>
<li><a href="#trunkSourceWebCoreModulesmediacontrolsmediaControlsApplejs">trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js</a></li>
<li><a href="#trunkSourceWebCorehtmlHTMLMediaElementcpp">trunk/Source/WebCore/html/HTMLMediaElement.cpp</a></li>
<li><a href="#trunkSourceWebCorehtmltrackTextTrackcpp">trunk/Source/WebCore/html/track/TextTrack.cpp</a></li>
<li><a href="#trunkSourceWebCorehtmltrackTextTrackh">trunk/Source/WebCore/html/track/TextTrack.h</a></li>
<li><a href="#trunkSourceWebCorehtmltrackTrackBaseh">trunk/Source/WebCore/html/track/TrackBase.h</a></li>
<li><a href="#trunkSourceWebCorepageCaptionUserPreferencescpp">trunk/Source/WebCore/page/CaptionUserPreferences.cpp</a></li>
<li><a href="#trunkSourceWebCorepageCaptionUserPreferencesh">trunk/Source/WebCore/page/CaptionUserPreferences.h</a></li>
<li><a href="#trunkSourceWebCorepageCaptionUserPreferencesMediaAFcpp">trunk/Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp</a></li>
<li><a href="#trunkSourceWebCoreplatformgraphicsavfoundationobjcMediaPlayerPrivateAVFoundationObjCmm">trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm</a></li>
<li><a href="#trunkSourceWebCoretestingInternalscpp">trunk/Source/WebCore/testing/Internals.cpp</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsmediatracktrackmanualmodeexpectedtxt">trunk/LayoutTests/media/track/track-manual-mode-expected.txt</a></li>
<li><a href="#trunkLayoutTestsmediatracktrackmanualmodehtml">trunk/LayoutTests/media/track/track-manual-mode.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/LayoutTests/ChangeLog        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2016-02-02  Eric Carlson  &lt;eric.carlson@apple.com&gt;
+
+        Allow ports to disable automatic text track selection
+        https://bugs.webkit.org/show_bug.cgi?id=153761
+        &lt;rdar://problem/24416768&gt;
+
+        Reviewed by Darin Adler.
+
+        * media/track/track-manual-mode-expected.txt: Added.
+        * media/track/track-manual-mode.html: Added.
+
</ins><span class="cx"> 2016-02-02  Zalan Bujtas  &lt;zalan@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [Win] gardening after r195740. (more to follow)
</span></span></pre></div>
<a id="trunkLayoutTestsmediatracktrackmanualmodeexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/media/track/track-manual-mode-expected.txt (0 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/media/track/track-manual-mode-expected.txt                                (rev 0)
+++ trunk/LayoutTests/media/track/track-manual-mode-expected.txt        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -0,0 +1,53 @@
</span><ins>+Tests 'manual' caption mode.
+
+
+RUN(internals.setUserPreferredLanguages(['en']))
+RUN(internals.setPrimaryAudioTrackLanguageOverride('fr'))
+RUN(internals.setCaptionDisplayMode('manual'))
+EVENT(canplaythrough)
+
+** Forced tracks should be in .textTracks as well as in the menu,
+** but should be labeled as 'subtitles'
+
+EXPECTED (video.textTracks.length == '9') OK
+EXPECTED (trackMenuItems.length == '11') OK
+
+** No track should be enabled by default
+EXPECTED (video.textTracks[0].language == 'en') OK
+EXPECTED (video.textTracks[0].kind == 'subtitles') OK
+EXPECTED (video.textTracks[0].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[1].language == 'en') OK
+EXPECTED (video.textTracks[1].kind == 'subtitles') OK
+EXPECTED (video.textTracks[1].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[2].language == 'fr') OK
+EXPECTED (video.textTracks[2].kind == 'subtitles') OK
+EXPECTED (video.textTracks[2].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[3].language == 'fr') OK
+EXPECTED (video.textTracks[3].kind == 'subtitles') OK
+EXPECTED (video.textTracks[3].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[4].language == 'es') OK
+EXPECTED (video.textTracks[4].kind == 'subtitles') OK
+EXPECTED (video.textTracks[4].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[5].language == 'es') OK
+EXPECTED (video.textTracks[5].kind == 'subtitles') OK
+EXPECTED (video.textTracks[5].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[6].language == 'de') OK
+EXPECTED (video.textTracks[6].kind == 'subtitles') OK
+EXPECTED (video.textTracks[6].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[7].language == 'de') OK
+EXPECTED (video.textTracks[7].kind == 'subtitles') OK
+EXPECTED (video.textTracks[7].mode == 'disabled') OK
+
+EXPECTED (video.textTracks[8].language == 'en') OK
+EXPECTED (video.textTracks[8].kind == 'captions') OK
+EXPECTED (video.textTracks[8].mode == 'disabled') OK
+
+END OF TEST
+
</ins></span></pre></div>
<a id="trunkLayoutTestsmediatracktrackmanualmodehtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/media/track/track-manual-mode.html (0 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/media/track/track-manual-mode.html                                (rev 0)
+++ trunk/LayoutTests/media/track/track-manual-mode.html        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -0,0 +1,94 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+    &lt;head&gt;
+        &lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=utf-8&quot; /&gt;
+
+        &lt;script src=../media-controls.js&gt;&lt;/script&gt;
+        &lt;script src=../trackmenu-test.js&gt;&lt;/script&gt;
+        &lt;script src=../video-test.js&gt;&lt;/script&gt;
+        &lt;script&gt;
+
+            function testTracks()
+            {
+                consoleWrite(`&lt;br&gt;&lt;i&gt;** Forced tracks should be in .textTracks as well as in the menu,`);
+                consoleWrite(`&lt;i&gt;** but should be labeled as 'subtitles'&lt;/i&gt;&lt;br&gt;`);
+                testExpected(&quot;video.textTracks.length&quot;, 9);
+
+                // Click the CC button to show the menu because it isn't created until it becomes visible.
+                clickCCButton();
+
+                trackMenuItems = captionTrackMenuList();
+                if (!trackMenuItems) {
+                    failTest(&quot;Failed to find track menu!&quot;);
+                    return;
+                }
+                testExpected(&quot;trackMenuItems.length&quot;, 11);
+
+                consoleWrite(&quot;&lt;br&gt;&lt;i&gt;** No track should be enabled by default&lt;&quot; + &quot;/i&gt;&quot;);
+                testExpected(&quot;video.textTracks[0].language&quot;, &quot;en&quot;);
+                testExpected(&quot;video.textTracks[0].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[0].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[1].language&quot;, &quot;en&quot;);
+                testExpected(&quot;video.textTracks[1].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[1].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[2].language&quot;, &quot;fr&quot;);
+                testExpected(&quot;video.textTracks[2].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[2].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[3].language&quot;, &quot;fr&quot;);
+                testExpected(&quot;video.textTracks[3].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[3].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[4].language&quot;, &quot;es&quot;);
+                testExpected(&quot;video.textTracks[4].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[4].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[5].language&quot;, &quot;es&quot;);
+                testExpected(&quot;video.textTracks[5].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[5].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[6].language&quot;, &quot;de&quot;);
+                testExpected(&quot;video.textTracks[6].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[6].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[7].language&quot;, &quot;de&quot;);
+                testExpected(&quot;video.textTracks[7].kind&quot;, &quot;subtitles&quot;);
+                testExpected(&quot;video.textTracks[7].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                testExpected(&quot;video.textTracks[8].language&quot;, &quot;en&quot;);
+                testExpected(&quot;video.textTracks[8].kind&quot;, &quot;captions&quot;);
+                testExpected(&quot;video.textTracks[8].mode&quot;, &quot;disabled&quot;);
+                consoleWrite(&quot;&quot;);
+
+                endTest();
+            }
+
+            function setup()
+            {
+                findMediaElement();
+                run(&quot;internals.setUserPreferredLanguages(['en'])&quot;);
+                run(&quot;internals.setPrimaryAudioTrackLanguageOverride('fr')&quot;);
+                run(&quot;internals.setCaptionDisplayMode('manual')&quot;);
+                video.src = '../content/CC+Subtitles.mov';
+
+                waitForEvent('canplaythrough', testTracks);
+            }
+
+        &lt;/script&gt;
+    &lt;/head&gt;
+    &lt;body onload=&quot;setup()&quot;&gt;
+        &lt;p&gt;Tests 'manual' caption mode.&lt;/p&gt;
+        &lt;video width=&quot;640&quot; height=&quot;360&quot; controls&gt;
+        &lt;/video&gt;
+    &lt;/body&gt;
+&lt;/html&gt;
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/ChangeLog        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -1,3 +1,56 @@
</span><ins>+2016-02-02  Eric Carlson  &lt;eric.carlson@apple.com&gt;
+
+        Allow ports to disable automatic text track selection
+        https://bugs.webkit.org/show_bug.cgi?id=153761
+        &lt;rdar://problem/24416768&gt;
+
+        Reviewed by Darin Adler.
+
+        Test: media/track/track-manual-mode.html
+
+        * Modules/mediacontrols/MediaControlsHost.cpp:
+        (WebCore::MediaControlsHost::manualKeyword): New.
+        (WebCore::MediaControlsHost::captionDisplayMode): Support 'manual' mode.
+        * Modules/mediacontrols/MediaControlsHost.h:
+
+        * Modules/mediacontrols/mediaControlsApple.js:
+        (Controller.prototype.buildCaptionMenu): Check the 'off' item when in manual mode.
+
+        * html/HTMLMediaElement.cpp:
+        (WebCore::HTMLMediaElement::addTextTrack): Update m_captionDisplayMode when called for the first
+          time so it is always correct. Set the track's manual selection mode as appropriate.
+        (WebCore::HTMLMediaElement::captionPreferencesChanged): Set each track's manual selection 
+          mode as appropriate.
+
+        * html/track/TextTrack.cpp:
+        (WebCore::TextTrack::kind): Return 'subtitles' for forced tracks when in manual mode.
+        * html/track/TextTrack.h:
+
+        * html/track/TrackBase.h:
+        (WebCore::TrackBase::kind): Make virtual.
+
+        * page/CaptionUserPreferences.cpp:
+        (WebCore::CaptionUserPreferences::beginBlockingNotifications): New.
+        (WebCore::CaptionUserPreferences::endBlockingNotifications): Ditto.
+        (WebCore::CaptionUserPreferences::notify): Don't notify when blocked.
+        * page/CaptionUserPreferences.h:
+
+        * page/CaptionUserPreferencesMediaAF.cpp:
+        (WebCore::CaptionUserPreferencesMediaAF::CaptionUserPreferencesMediaAF): Set manual mode 
+          when appropriate.
+        (WebCore::CaptionUserPreferencesMediaAF::captionDisplayMode): Check manual mode.
+        (WebCore::CaptionUserPreferencesMediaAF::setCaptionDisplayMode): Ditto.
+        (WebCore::CaptionUserPreferencesMediaAF::setPreferredLanguage): Ditto.
+        (WebCore::CaptionUserPreferencesMediaAF::textTrackSelectionScore): Return zero when in manual mode.
+        (WebCore::CaptionUserPreferencesMediaAF::sortedTrackListForMenu): Consider manual mode. Fix
+          typos in logging.
+
+        * platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:
+        (WebCore::mediaDescriptionForKind): Return 'auxiliary' when in manual mode.
+
+        * testing/Internals.cpp:
+        (WebCore::Internals::setCaptionDisplayMode): Support manual mode.
+
</ins><span class="cx"> 2016-02-02  Adrien Plazas  &lt;aplazas@igalia.com&gt;
</span><span class="cx"> 
</span><span class="cx">         REGRESSION(r195899): ASSERTION FAILED: is&lt;Target&gt;(source) in EventPath::retargetTouch() since r195899
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesmediacontrolsMediaControlsHostcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -61,6 +61,13 @@
</span><span class="cx">     return alwaysOn;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+const AtomicString&amp; MediaControlsHost::manualKeyword()
+{
+    static NeverDestroyed&lt;const AtomicString&gt; alwaysOn(&quot;manual&quot;, AtomicString::ConstructFromLiteral);
+    return alwaysOn;
+}
+
+
</ins><span class="cx"> Ref&lt;MediaControlsHost&gt; MediaControlsHost::create(HTMLMediaElement* mediaElement)
</span><span class="cx"> {
</span><span class="cx">     return adoptRef(*new MediaControlsHost(mediaElement));
</span><span class="lines">@@ -151,6 +158,8 @@
</span><span class="cx">         return forcedOnlyKeyword();
</span><span class="cx">     case CaptionUserPreferences::AlwaysOn:
</span><span class="cx">         return alwaysOnKeyword();
</span><ins>+    case CaptionUserPreferences::Manual:
+        return manualKeyword();
</ins><span class="cx">     default:
</span><span class="cx">         ASSERT_NOT_REACHED();
</span><span class="cx">         return emptyAtom;
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesmediacontrolsMediaControlsHosth"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/Modules/mediacontrols/MediaControlsHost.h        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -52,6 +52,7 @@
</span><span class="cx">     static const AtomicString&amp; automaticKeyword();
</span><span class="cx">     static const AtomicString&amp; forcedOnlyKeyword();
</span><span class="cx">     static const AtomicString&amp; alwaysOnKeyword();
</span><ins>+    static const AtomicString&amp; manualKeyword();
</ins><span class="cx"> 
</span><span class="cx">     Vector&lt;RefPtr&lt;TextTrack&gt;&gt; sortedTrackListForMenu(TextTrackList*);
</span><span class="cx">     Vector&lt;RefPtr&lt;AudioTrack&gt;&gt; sortedTrackListForMenu(AudioTrackList*);
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesmediacontrolsmediaControlsApplejs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -1836,7 +1836,7 @@
</span><span class="cx"> 
</span><span class="cx">             }
</span><span class="cx"> 
</span><del>-            if (offMenu &amp;&amp; displayMode === 'forced-only' &amp;&amp; !trackMenuItemSelected) {
</del><ins>+            if (offMenu &amp;&amp; (displayMode === 'forced-only' || displayMode === 'manual') &amp;&amp; !trackMenuItemSelected) {
</ins><span class="cx">                 offMenu.classList.add(this.ClassNames.selected);
</span><span class="cx">                 offMenu.setAttribute('tabindex', '0');
</span><span class="cx">                 offMenu.setAttribute('aria-checked', 'true');
</span></span></pre></div>
<a id="trunkSourceWebCorehtmlHTMLMediaElementcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/HTMLMediaElement.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/HTMLMediaElement.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/html/HTMLMediaElement.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -3576,9 +3576,13 @@
</span><span class="cx"> 
</span><span class="cx">     if (!m_requireCaptionPreferencesChangedCallbacks) {
</span><span class="cx">         m_requireCaptionPreferencesChangedCallbacks = true;
</span><del>-        document().registerForCaptionPreferencesChangedCallbacks(this);
</del><ins>+        Document&amp; document = this-&gt;document();
+        document.registerForCaptionPreferencesChangedCallbacks(this);
+        if (Page* page = document.page())
+            m_captionDisplayMode = page-&gt;group().captionPreferences()-&gt;captionDisplayMode();
</ins><span class="cx">     }
</span><span class="cx"> 
</span><ins>+    track-&gt;setManualSelectionMode(m_captionDisplayMode == CaptionUserPreferences::Manual);
</ins><span class="cx">     textTracks()-&gt;append(track);
</span><span class="cx"> 
</span><span class="cx">     closeCaptionTracksChanged();
</span><span class="lines">@@ -5723,6 +5727,11 @@
</span><span class="cx">     if (m_captionDisplayMode == displayMode)
</span><span class="cx">         return;
</span><span class="cx"> 
</span><ins>+    if (m_captionDisplayMode == CaptionUserPreferences::Manual || displayMode == CaptionUserPreferences::Manual) {
+        for (unsigned i = 0; i &lt; m_textTracks-&gt;length(); ++i)
+            m_textTracks-&gt;item(i)-&gt;setManualSelectionMode(displayMode == CaptionUserPreferences::Manual);
+    }
+
</ins><span class="cx">     m_captionDisplayMode = displayMode;
</span><span class="cx">     setWebkitClosedCaptionsVisible(m_captionDisplayMode == CaptionUserPreferences::AlwaysOn);
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceWebCorehtmltrackTextTrackcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/track/TextTrack.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/track/TextTrack.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/html/track/TextTrack.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -173,6 +173,15 @@
</span><span class="cx">     return false;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+AtomicString TextTrack::kind() const
+{
+    AtomicString kind = TrackBase::kind();
+    if (!m_manualSelectionMode || kind != forcedKeyword())
+        return kind;
+
+    return subtitlesKeyword();
+}
+
</ins><span class="cx"> void TextTrack::setKind(const AtomicString&amp; newKind)
</span><span class="cx"> {
</span><span class="cx">     String oldKind = kind();
</span></span></pre></div>
<a id="trunkSourceWebCorehtmltrackTextTrackh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/track/TextTrack.h (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/track/TextTrack.h        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/html/track/TextTrack.h        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -82,7 +82,8 @@
</span><span class="cx">     static const AtomicString&amp; hiddenKeyword();
</span><span class="cx">     static const AtomicString&amp; showingKeyword();
</span><span class="cx"> 
</span><del>-    virtual void setKind(const AtomicString&amp;) override;
</del><ins>+    void setKind(const AtomicString&amp;) override;
+    AtomicString kind() const override;
</ins><span class="cx"> 
</span><span class="cx">     virtual AtomicString inBandMetadataTrackDispatchType() const { return emptyString(); }
</span><span class="cx"> 
</span><span class="lines">@@ -142,6 +143,8 @@
</span><span class="cx"> 
</span><span class="cx">     virtual MediaTime startTimeVariance() const { return MediaTime::zeroTime(); }
</span><span class="cx"> 
</span><ins>+    void setManualSelectionMode(bool mode) { m_manualSelectionMode = mode; }
+
</ins><span class="cx">     using RefCounted&lt;TrackBase&gt;::ref;
</span><span class="cx">     using RefCounted&lt;TrackBase&gt;::deref;
</span><span class="cx"> 
</span><span class="lines">@@ -171,6 +174,7 @@
</span><span class="cx">     int m_trackIndex;
</span><span class="cx">     int m_renderedTrackIndex;
</span><span class="cx">     bool m_hasBeenConfigured;
</span><ins>+    bool m_manualSelectionMode { false };
</ins><span class="cx"> };
</span><span class="cx"> 
</span><span class="cx"> inline TextTrack* toTextTrack(TrackBase* track)
</span></span></pre></div>
<a id="trunkSourceWebCorehtmltrackTrackBaseh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/html/track/TrackBase.h (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/html/track/TrackBase.h        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/html/track/TrackBase.h        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -51,7 +51,7 @@
</span><span class="cx">     virtual AtomicString id() const { return m_id; }
</span><span class="cx">     virtual void setId(const AtomicString&amp; id) { m_id = id; }
</span><span class="cx"> 
</span><del>-    AtomicString kind() const { return m_kind; }
</del><ins>+    virtual AtomicString kind() const { return m_kind; }
</ins><span class="cx">     virtual void setKind(const AtomicString&amp;);
</span><span class="cx"> 
</span><span class="cx">     AtomicString label() const { return m_label; }
</span></span></pre></div>
<a id="trunkSourceWebCorepageCaptionUserPreferencescpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/CaptionUserPreferences.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/CaptionUserPreferences.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/page/CaptionUserPreferences.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -62,8 +62,22 @@
</span><span class="cx">     captionPreferencesChanged();
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+void CaptionUserPreferences::beginBlockingNotifications()
+{
+    ++m_blockNotificationsCounter;
+}
+
+void CaptionUserPreferences::endBlockingNotifications()
+{
+    ASSERT(m_blockNotificationsCounter);
+    --m_blockNotificationsCounter;
+}
+
</ins><span class="cx"> void CaptionUserPreferences::notify()
</span><span class="cx"> {
</span><ins>+    if (m_blockNotificationsCounter)
+        return;
+
</ins><span class="cx">     m_havePreferences = true;
</span><span class="cx">     if (!m_timer.isActive())
</span><span class="cx">         m_timer.startOneShot(0);
</span></span></pre></div>
<a id="trunkSourceWebCorepageCaptionUserPreferencesh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/CaptionUserPreferences.h (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/CaptionUserPreferences.h        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/page/CaptionUserPreferences.h        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -50,7 +50,8 @@
</span><span class="cx">     enum CaptionDisplayMode {
</span><span class="cx">         Automatic,
</span><span class="cx">         ForcedOnly,
</span><del>-        AlwaysOn
</del><ins>+        AlwaysOn,
+        Manual,
</ins><span class="cx">     };
</span><span class="cx">     virtual CaptionDisplayMode captionDisplayMode() const;
</span><span class="cx">     virtual void setCaptionDisplayMode(CaptionDisplayMode);
</span><span class="lines">@@ -98,18 +99,21 @@
</span><span class="cx"> 
</span><span class="cx"> protected:
</span><span class="cx">     void updateCaptionStyleSheetOveride();
</span><ins>+    void beginBlockingNotifications();
+    void endBlockingNotifications();
</ins><span class="cx"> 
</span><span class="cx"> private:
</span><span class="cx">     void timerFired();
</span><span class="cx">     void notify();
</span><span class="cx"> 
</span><span class="cx">     PageGroup&amp; m_pageGroup;
</span><del>-    CaptionDisplayMode m_displayMode;
</del><ins>+    mutable CaptionDisplayMode m_displayMode;
</ins><span class="cx">     Timer m_timer;
</span><span class="cx">     String m_userPreferredLanguage;
</span><span class="cx">     String m_userPreferredAudioCharacteristic;
</span><span class="cx">     String m_captionsStyleSheetOverride;
</span><span class="cx">     String m_primaryAudioTrackLanguageOverride;
</span><ins>+    unsigned m_blockNotificationsCounter { 0 };
</ins><span class="cx">     bool m_testingMode;
</span><span class="cx">     bool m_havePreferences;
</span><span class="cx"> };
</span></span></pre></div>
<a id="trunkSourceWebCorepageCaptionUserPreferencesMediaAFcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/page/CaptionUserPreferencesMediaAF.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -75,9 +75,19 @@
</span><span class="cx"> #define kCTFontNameAttribute getkCTFontNameAttribute()
</span><span class="cx"> 
</span><span class="cx"> #define CTFontDescriptorCopyAttribute softLink_CTFontDescriptorCopyAttribute
</span><del>-#endif
-#endif
</del><span class="cx"> 
</span><ins>+typedef Boolean (*MTEnableCaption2015BehaviorPtrType) ();
+static MTEnableCaption2015BehaviorPtrType MTEnableCaption2015BehaviorPtr() { return nullptr; }
+
+#else
+
+SOFT_LINK_FRAMEWORK(MediaToolbox)
+SOFT_LINK_OPTIONAL(MediaToolbox, MTEnableCaption2015Behavior, Boolean, (), ())
+
+#endif // PLATFORM(WIN)
+
+#endif // HAVE(MEDIA_ACCESSIBILITY_FRAMEWORK)
+
</ins><span class="cx"> namespace WebCore {
</span><span class="cx"> 
</span><span class="cx"> #if HAVE(MEDIA_ACCESSIBILITY_FRAMEWORK)
</span><span class="lines">@@ -100,6 +110,21 @@
</span><span class="cx">     , m_listeningForPreferenceChanges(false)
</span><span class="cx"> #endif
</span><span class="cx"> {
</span><ins>+    static bool initialized;
+    if (!initialized) {
+        initialized = true;
+
+        MTEnableCaption2015BehaviorPtrType function = MTEnableCaption2015BehaviorPtr();
+        if (!function || !function())
+            return;
+
+        beginBlockingNotifications();
+        CaptionUserPreferences::setCaptionDisplayMode(Manual);
+        setUserPrefersCaptions(false);
+        setUserPrefersSubtitles(false);
+        setUserPrefersTextDescriptions(false);
+        endBlockingNotifications();
+    }
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> CaptionUserPreferencesMediaAF::~CaptionUserPreferencesMediaAF()
</span><span class="lines">@@ -116,8 +141,9 @@
</span><span class="cx"> 
</span><span class="cx"> CaptionUserPreferences::CaptionDisplayMode CaptionUserPreferencesMediaAF::captionDisplayMode() const
</span><span class="cx"> {
</span><del>-    if (testingMode() || !MediaAccessibilityLibrary())
-        return CaptionUserPreferences::captionDisplayMode();
</del><ins>+    CaptionDisplayMode internalMode = CaptionUserPreferences::captionDisplayMode();
+    if (internalMode == Manual || testingMode() || !MediaAccessibilityLibrary())
+        return internalMode;
</ins><span class="cx"> 
</span><span class="cx">     MACaptionAppearanceDisplayType displayType = MACaptionAppearanceGetDisplayType(kMACaptionAppearanceDomainUser);
</span><span class="cx">     switch (displayType) {
</span><span class="lines">@@ -142,6 +168,9 @@
</span><span class="cx">         return;
</span><span class="cx">     }
</span><span class="cx"> 
</span><ins>+    if (captionDisplayMode() == Manual)
+        return;
+
</ins><span class="cx">     MACaptionAppearanceDisplayType displayType = kMACaptionAppearanceDisplayTypeForcedOnly;
</span><span class="cx">     switch (mode) {
</span><span class="cx">     case Automatic:
</span><span class="lines">@@ -432,6 +461,9 @@
</span><span class="cx"> 
</span><span class="cx"> void CaptionUserPreferencesMediaAF::setPreferredLanguage(const String&amp; language)
</span><span class="cx"> {
</span><ins>+    if (CaptionUserPreferences::captionDisplayMode() == Manual)
+        return;
+
</ins><span class="cx">     if (testingMode() || !MediaAccessibilityLibrary()) {
</span><span class="cx">         CaptionUserPreferences::setPreferredLanguage(language);
</span><span class="cx">         return;
</span><span class="lines">@@ -661,6 +693,9 @@
</span><span class="cx"> int CaptionUserPreferencesMediaAF::textTrackSelectionScore(TextTrack* track, HTMLMediaElement* mediaElement) const
</span><span class="cx"> {
</span><span class="cx">     CaptionDisplayMode displayMode = captionDisplayMode();
</span><ins>+    if (displayMode == Manual)
+        return 0;
+
</ins><span class="cx">     bool legacyOverride = mediaElement-&gt;webkitClosedCaptionsVisible();
</span><span class="cx">     if (displayMode == AlwaysOn &amp;&amp; (!userPrefersSubtitles() &amp;&amp; !userPrefersCaptions() &amp;&amp; !legacyOverride))
</span><span class="cx">         return 0;
</span><span class="lines">@@ -804,6 +839,7 @@
</span><span class="cx"> 
</span><span class="cx">     Vector&lt;RefPtr&lt;TextTrack&gt;&gt; tracksForMenu;
</span><span class="cx">     HashSet&lt;String&gt; languagesIncluded;
</span><ins>+    CaptionDisplayMode displayMode = captionDisplayMode();
</ins><span class="cx">     bool prefersAccessibilityTracks = userPrefersCaptions();
</span><span class="cx">     bool filterTrackList = shouldFilterTrackMenu();
</span><span class="cx"> 
</span><span class="lines">@@ -811,17 +847,23 @@
</span><span class="cx">         TextTrack* track = trackList-&gt;item(i);
</span><span class="cx">         String language = displayNameForLanguageLocale(track-&gt;language());
</span><span class="cx"> 
</span><ins>+        if (displayMode == Manual) {
+            LOG(Media, &quot;CaptionUserPreferencesMediaAF::sortedTrackListForMenu - adding '%s' track with language '%s' because selection mode is 'manual'&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
+            tracksForMenu.append(track);
+            continue;
+        }
+
</ins><span class="cx">         const AtomicString&amp; kind = track-&gt;kind();
</span><span class="cx">         if (kind != TextTrack::captionsKeyword() &amp;&amp; kind != TextTrack::descriptionsKeyword() &amp;&amp; kind != TextTrack::subtitlesKeyword())
</span><span class="cx">             continue;
</span><span class="cx"> 
</span><span class="cx">         if (track-&gt;containsOnlyForcedSubtitles()) {
</span><del>-            LOG(Media, &quot;CaptionUserPreferencesMac::sortedTrackListForMenu - skipping '%s' track with language '%s' because it contains only forced subtitles&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</del><ins>+            LOG(Media, &quot;CaptionUserPreferencesMediaAF::sortedTrackListForMenu - skipping '%s' track with language '%s' because it contains only forced subtitles&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</ins><span class="cx">             continue;
</span><span class="cx">         }
</span><span class="cx">         
</span><span class="cx">         if (track-&gt;isEasyToRead()) {
</span><del>-            LOG(Media, &quot;CaptionUserPreferencesMac::sortedTrackListForMenu - adding '%s' track with language '%s' because it is 'easy to read'&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</del><ins>+            LOG(Media, &quot;CaptionUserPreferencesMediaAF::sortedTrackListForMenu - adding '%s' track with language '%s' because it is 'easy to read'&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</ins><span class="cx">             if (!language.isEmpty())
</span><span class="cx">                 languagesIncluded.add(language);
</span><span class="cx">             tracksForMenu.append(track);
</span><span class="lines">@@ -829,7 +871,7 @@
</span><span class="cx">         }
</span><span class="cx"> 
</span><span class="cx">         if (track-&gt;mode() == TextTrack::showingKeyword()) {
</span><del>-            LOG(Media, &quot;CaptionUserPreferencesMac::sortedTrackListForMenu - adding '%s' track with language '%s' because it is already visible&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</del><ins>+            LOG(Media, &quot;CaptionUserPreferencesMediaAF::sortedTrackListForMenu - adding '%s' track with language '%s' because it is already visible&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data());
</ins><span class="cx">             if (!language.isEmpty())
</span><span class="cx">                 languagesIncluded.add(language);
</span><span class="cx">             tracksForMenu.append(track);
</span><span class="lines">@@ -861,7 +903,7 @@
</span><span class="cx">             languagesIncluded.add(language);
</span><span class="cx">         tracksForMenu.append(track);
</span><span class="cx"> 
</span><del>-        LOG(Media, &quot;CaptionUserPreferencesMac::sortedTrackListForMenu - adding '%s' track with language '%s', is%s main program content&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data(), track-&gt;isMainProgramContent() ? &quot;&quot; : &quot; NOT&quot;);
</del><ins>+        LOG(Media, &quot;CaptionUserPreferencesMediaAF::sortedTrackListForMenu - adding '%s' track with language '%s', is%s main program content&quot;, track-&gt;kind().string().utf8().data(), language.utf8().data(), track-&gt;isMainProgramContent() ? &quot;&quot; : &quot; NOT&quot;);
</ins><span class="cx">     }
</span><span class="cx"> 
</span><span class="cx">     // Now that we have filtered for the user's accessibility/translation preference, add  all tracks with a unique language without regard to track type.
</span><span class="lines">@@ -869,6 +911,9 @@
</span><span class="cx">         TextTrack* track = trackList-&gt;item(i);
</span><span class="cx">         String language = displayNameForLanguageLocale(track-&gt;language());
</span><span class="cx"> 
</span><ins>+        if (tracksForMenu.contains(track))
+            continue;
+
</ins><span class="cx">         const AtomicString&amp; kind = track-&gt;kind();
</span><span class="cx">         if (kind != TextTrack::captionsKeyword() &amp;&amp; kind != TextTrack::descriptionsKeyword() &amp;&amp; kind != TextTrack::subtitlesKeyword())
</span><span class="cx">             continue;
</span></span></pre></div>
<a id="trunkSourceWebCoreplatformgraphicsavfoundationobjcMediaPlayerPrivateAVFoundationObjCmm"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -255,6 +255,7 @@
</span><span class="cx"> SOFT_LINK_POINTER(AVFoundation, AVOutOfBandAlternateTrackSourceKey, NSString*)
</span><span class="cx"> SOFT_LINK_POINTER(AVFoundation, AVMediaCharacteristicDescribesMusicAndSoundForAccessibility, NSString*)
</span><span class="cx"> SOFT_LINK_POINTER(AVFoundation, AVMediaCharacteristicTranscribesSpokenDialogForAccessibility, NSString*)
</span><ins>+SOFT_LINK_POINTER(AVFoundation, AVMediaCharacteristicIsAuxiliaryContent, NSString*)
</ins><span class="cx"> 
</span><span class="cx"> #define AVURLAssetHTTPCookiesKey getAVURLAssetHTTPCookiesKey()
</span><span class="cx"> #define AVURLAssetOutOfBandAlternateTracksKey getAVURLAssetOutOfBandAlternateTracksKey()
</span><span class="lines">@@ -266,6 +267,7 @@
</span><span class="cx"> #define AVOutOfBandAlternateTrackSourceKey getAVOutOfBandAlternateTrackSourceKey()
</span><span class="cx"> #define AVMediaCharacteristicDescribesMusicAndSoundForAccessibility getAVMediaCharacteristicDescribesMusicAndSoundForAccessibility()
</span><span class="cx"> #define AVMediaCharacteristicTranscribesSpokenDialogForAccessibility getAVMediaCharacteristicTranscribesSpokenDialogForAccessibility()
</span><ins>+#define AVMediaCharacteristicIsAuxiliaryContent getAVMediaCharacteristicIsAuxiliaryContent()
</ins><span class="cx"> #endif
</span><span class="cx"> 
</span><span class="cx"> #if ENABLE(DATACUE_VALUE)
</span><span class="lines">@@ -305,6 +307,9 @@
</span><span class="cx"> #define kCVPixelBufferIOSurfaceOpenGLFBOCompatibilityKey getkCVPixelBufferIOSurfaceOpenGLFBOCompatibilityKey()
</span><span class="cx"> #endif
</span><span class="cx"> 
</span><ins>+SOFT_LINK_FRAMEWORK(MediaToolbox)
+SOFT_LINK_OPTIONAL(MediaToolbox, MTEnableCaption2015Behavior, Boolean, (), ())
+
</ins><span class="cx"> using namespace WebCore;
</span><span class="cx"> 
</span><span class="cx"> enum MediaPlayerAVFoundationObservationContext {
</span><span class="lines">@@ -732,6 +737,10 @@
</span><span class="cx"> #if ENABLE(AVF_CAPTIONS)
</span><span class="cx"> static const NSArray* mediaDescriptionForKind(PlatformTextTrack::TrackKind kind)
</span><span class="cx"> {
</span><ins>+    static bool manualSelectionMode = MTEnableCaption2015BehaviorPtr() &amp;&amp; MTEnableCaption2015BehaviorPtr()();
+    if (manualSelectionMode)
+        return @[ AVMediaCharacteristicIsAuxiliaryContent ];
+
</ins><span class="cx">     // FIXME: Match these to correct types:
</span><span class="cx">     if (kind == PlatformTextTrack::Caption)
</span><span class="cx">         return [NSArray arrayWithObjects: AVMediaCharacteristicTranscribesSpokenDialogForAccessibility, nil];
</span></span></pre></div>
<a id="trunkSourceWebCoretestingInternalscpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/testing/Internals.cpp (196009 => 196010)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/testing/Internals.cpp        2016-02-02 16:16:32 UTC (rev 196009)
+++ trunk/Source/WebCore/testing/Internals.cpp        2016-02-02 16:38:02 UTC (rev 196010)
</span><span class="lines">@@ -2784,6 +2784,8 @@
</span><span class="cx">         captionPreferences-&gt;setCaptionDisplayMode(CaptionUserPreferences::ForcedOnly);
</span><span class="cx">     else if (equalLettersIgnoringASCIICase(mode, &quot;alwayson&quot;))
</span><span class="cx">         captionPreferences-&gt;setCaptionDisplayMode(CaptionUserPreferences::AlwaysOn);
</span><ins>+    else if (equalLettersIgnoringASCIICase(mode, &quot;manual&quot;))
+        captionPreferences-&gt;setCaptionDisplayMode(CaptionUserPreferences::Manual);
</ins><span class="cx">     else
</span><span class="cx">         ec = SYNTAX_ERR;
</span><span class="cx"> #else
</span></span></pre>
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