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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/174756">174756</a></dd>
<dt>Author</dt> <dd>dino@apple.com</dd>
<dt>Date</dt> <dd>2014-10-15 19:25:34 -0700 (Wed, 15 Oct 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>[Media] Reduce style updates (painting) in controls
https://bugs.webkit.org/show_bug.cgi?id=137763
&lt;rdar://problem/17833045&gt;

Reviewed by Simon Fraser.

Media controls were causing a lot of repaints they were
constantly updating the style of the widgets, the value
of the forms, or the text in the display.

This is necessary when the controls are visible, but not
necessary when they are hidden. Return immediately in that case.

* Modules/mediacontrols/mediaControlsApple.js:
(Controller.prototype.createControls): Initialise the slider to a zero value.
(Controller.prototype.handleDurationChange): Force an update even though we might be hidden.
(Controller.prototype.updateProgress): Don't update if we're hidden.
(Controller.prototype.updateTime): Ditto.
* Modules/mediacontrols/mediaControlsiOS.js:
(ControllerIOS.prototype.updateProgress): Ditto.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreModulesmediacontrolsmediaControlsApplejs">trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js</a></li>
<li><a href="#trunkSourceWebCoreModulesmediacontrolsmediaControlsiOSjs">trunk/Source/WebCore/Modules/mediacontrols/mediaControlsiOS.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (174755 => 174756)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-10-16 01:41:23 UTC (rev 174755)
+++ trunk/Source/WebCore/ChangeLog        2014-10-16 02:25:34 UTC (rev 174756)
</span><span class="lines">@@ -1,3 +1,26 @@
</span><ins>+2014-10-15  Dean Jackson  &lt;dino@apple.com&gt;
+
+        [Media] Reduce style updates (painting) in controls
+        https://bugs.webkit.org/show_bug.cgi?id=137763
+        &lt;rdar://problem/17833045&gt;
+
+        Reviewed by Simon Fraser.
+
+        Media controls were causing a lot of repaints they were
+        constantly updating the style of the widgets, the value
+        of the forms, or the text in the display.
+
+        This is necessary when the controls are visible, but not
+        necessary when they are hidden. Return immediately in that case.
+
+        * Modules/mediacontrols/mediaControlsApple.js:
+        (Controller.prototype.createControls): Initialise the slider to a zero value.
+        (Controller.prototype.handleDurationChange): Force an update even though we might be hidden.
+        (Controller.prototype.updateProgress): Don't update if we're hidden.
+        (Controller.prototype.updateTime): Ditto.
+        * Modules/mediacontrols/mediaControlsiOS.js:
+        (ControllerIOS.prototype.updateProgress): Ditto.
+
</ins><span class="cx"> 2014-10-15  Chris Dumez  &lt;cdumez@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         [Mac] Fix inefficiencies in ResourceResponse::platformLazyInit(InitLevel) - Part 2
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesmediacontrolsmediaControlsApplejs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js (174755 => 174756)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js        2014-10-16 01:41:23 UTC (rev 174755)
+++ trunk/Source/WebCore/Modules/mediacontrols/mediaControlsApple.js        2014-10-16 02:25:34 UTC (rev 174756)
</span><span class="lines">@@ -333,6 +333,7 @@
</span><span class="cx">         timeline.setAttribute('pseudo', '-webkit-media-controls-timeline');
</span><span class="cx">         timeline.setAttribute('aria-label', this.UIString('Duration'));
</span><span class="cx">         timeline.type = 'range';
</span><ins>+        timeline.value = 0;
</ins><span class="cx">         this.listenFor(timeline, 'input', this.handleTimelineChange);
</span><span class="cx">         this.listenFor(timeline, 'mouseover', this.handleTimelineMouseOver);
</span><span class="cx">         this.listenFor(timeline, 'mouseout', this.handleTimelineMouseOut);
</span><span class="lines">@@ -567,8 +568,8 @@
</span><span class="cx">     handleDurationChange: function(event)
</span><span class="cx">     {
</span><span class="cx">         this.updateDuration();
</span><del>-        this.updateTime();
-        this.updateProgress();
</del><ins>+        this.updateTime(true);
+        this.updateProgress(true);
</ins><span class="cx">     },
</span><span class="cx"> 
</span><span class="cx">     handlePlay: function(event)
</span><span class="lines">@@ -956,8 +957,11 @@
</span><span class="cx">         return gradient;
</span><span class="cx">     },
</span><span class="cx"> 
</span><del>-    updateProgress: function()
</del><ins>+    updateProgress: function(forceUpdate)
</ins><span class="cx">     {
</span><ins>+        if (!forceUpdate &amp;&amp; this.controlsAreHidden())
+            return;
+
</ins><span class="cx">         this.updateTimelineMetricsIfNeeded();
</span><span class="cx"> 
</span><span class="cx">         var background = 'url(\'data:image/svg+xml,&lt;svg xmlns=&quot;http://www.w3.org/2000/svg&quot; viewBox=&quot;0 0 1 1&quot; preserveAspectRatio=&quot;none&quot;&gt;&lt;linearGradient id=&quot;gradient&quot; x2=&quot;0&quot; y2=&quot;100%&quot; gradientUnits=&quot;userSpaceOnUse&quot;&gt;&lt;stop offset=&quot;0&quot; stop-color=&quot;rgb(2, 2, 2)&quot;/&gt;&lt;stop offset=&quot;1&quot; stop-color=&quot;rgb(23, 23, 23)&quot;/&gt;&lt;/linearGradient&gt;&lt;g style=&quot;fill:url(#gradient)&quot;&gt;'
</span><span class="lines">@@ -1050,8 +1054,11 @@
</span><span class="cx">         this.setNeedsTimelineMetricsUpdate();
</span><span class="cx">     },
</span><span class="cx"> 
</span><del>-    updateTime: function()
</del><ins>+    updateTime: function(forceUpdate)
</ins><span class="cx">     {
</span><ins>+        if (!forceUpdate &amp;&amp; this.controlsAreHidden())
+            return;
+
</ins><span class="cx">         var currentTime = this.video.currentTime;
</span><span class="cx">         var timeRemaining = currentTime - this.video.duration;
</span><span class="cx">         this.controls.currentTime.innerText = this.formatTime(currentTime);
</span></span></pre></div>
<a id="trunkSourceWebCoreModulesmediacontrolsmediaControlsiOSjs"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/Modules/mediacontrols/mediaControlsiOS.js (174755 => 174756)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/Modules/mediacontrols/mediaControlsiOS.js        2014-10-16 01:41:23 UTC (rev 174755)
+++ trunk/Source/WebCore/Modules/mediacontrols/mediaControlsiOS.js        2014-10-16 02:25:34 UTC (rev 174756)
</span><span class="lines">@@ -238,9 +238,12 @@
</span><span class="cx">         return 'rgba(0, 0, 0, 0.5)';
</span><span class="cx">     },
</span><span class="cx"> 
</span><del>-    updateProgress: function() {
-        Controller.prototype.updateProgress.call(this);
</del><ins>+    updateProgress: function(forceUpdate) {
+        Controller.prototype.updateProgress.call(this, forceUpdate);
</ins><span class="cx"> 
</span><ins>+        if (!forceUpdate &amp;&amp; this.controlsAreHidden())
+            return;
+
</ins><span class="cx">         var width = this.timelineWidth;
</span><span class="cx">         var height = this.timelineHeight;
</span><span class="cx"> 
</span></span></pre>
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