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<title>[175217] branches/safari-600.1.4.12-branch/Source/WebKit2</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/175217">175217</a></dd>
<dt>Author</dt> <dd>bshafiei@apple.com</dd>
<dt>Date</dt> <dd>2014-10-27 09:31:06 -0700 (Mon, 27 Oct 2014)</dd>
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<h3>Log Message</h3>
<pre>Merged <a href="http://trac.webkit.org/projects/webkit/changeset/175145">r175145</a>. rdar://problem/18376333</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchessafari6001412branchSourceWebKit2ChangeLog">branches/safari-600.1.4.12-branch/Source/WebKit2/ChangeLog</a></li>
<li><a href="#branchessafari6001412branchSourceWebKit2WebProcessWebPageiosWebPageIOSmm">branches/safari-600.1.4.12-branch/Source/WebKit2/WebProcess/WebPage/ios/WebPageIOS.mm</a></li>
</ul>
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<h3>Diff</h3>
<a id="branchessafari6001412branchSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.12-branch/Source/WebKit2/ChangeLog (175216 => 175217)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.12-branch/Source/WebKit2/ChangeLog 2014-10-27 08:09:37 UTC (rev 175216)
+++ branches/safari-600.1.4.12-branch/Source/WebKit2/ChangeLog 2014-10-27 16:31:06 UTC (rev 175217)
</span><span class="lines">@@ -1,5 +1,36 @@
</span><span class="cx"> 2014-10-27 Babak Shafiei <bshafiei@apple.com>
</span><span class="cx">
</span><ins>+ Merge r175145.
+
+ 2014-10-23 Benjamin Poulain <bpoulain@apple.com>
+
+ [iOS WK2] Make sure any dynamic viewport update schedules a layer tree commit
+ https://bugs.webkit.org/show_bug.cgi?id=138021
+
+ Reviewed by Simon Fraser.
+
+ * WebProcess/WebPage/ios/WebPageIOS.mm:
+ (WebKit::WebPage::dynamicViewportSizeUpdate):
+ Sometimes, the clients can do a dynamic viewport update but only change the minimum
+ layout size (see rdar://problem/18755250).
+
+ When that happens, it is possible to do the full state update without ever scheduling
+ a layer tree commit. For example, if the new minimum layout height is only a few pixels
+ smaller than the old value and the layout of the page is equal or larger than the old value,
+ the layout is done without any side effect to the content (assuming a viewport configuration
+ based on width).
+
+ The contract with the client is that the next layer tree commit after a dynamic viewport update
+ carries all the valid parameters for the new viewport size. Since the new layout never scheduled
+ a layer tree commit, the UIProcess is just waiting for one, discarding all input.
+
+ This patch solves the issue by explicitely scheduling a layer flush after updating all the layout
+ and view parameters to their final values. In most cases, this makes no difference since a layer
+ tree commit was already scheduled. In the rare cases where nothing was scheduled, scheduling
+ the layer tree commit ensure we unlock the UIProcess.
+
+2014-10-27 Babak Shafiei <bshafiei@apple.com>
+
</ins><span class="cx"> Merge r175143.
</span><span class="cx">
</span><span class="cx"> 2014-10-23 Ryosuke Niwa <rniwa@webkit.org>
</span></span></pre></div>
<a id="branchessafari6001412branchSourceWebKit2WebProcessWebPageiosWebPageIOSmm"></a>
<div class="modfile"><h4>Modified: branches/safari-600.1.4.12-branch/Source/WebKit2/WebProcess/WebPage/ios/WebPageIOS.mm (175216 => 175217)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.1.4.12-branch/Source/WebKit2/WebProcess/WebPage/ios/WebPageIOS.mm 2014-10-27 08:09:37 UTC (rev 175216)
+++ branches/safari-600.1.4.12-branch/Source/WebKit2/WebProcess/WebPage/ios/WebPageIOS.mm 2014-10-27 16:31:06 UTC (rev 175217)
</span><span class="lines">@@ -2383,6 +2383,8 @@
</span><span class="cx"> setDeviceOrientation(deviceOrientation);
</span><span class="cx"> frameView.setScrollOffset(roundedUnobscuredContentRectPosition);
</span><span class="cx">
</span><ins>+ m_drawingArea->scheduleCompositingLayerFlush();
+
</ins><span class="cx"> send(Messages::WebPageProxy::DynamicViewportUpdateChangedTarget(pageScaleFactor(), frameView.scrollPosition()));
</span><span class="cx"> }
</span><span class="cx">
</span></span></pre>
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