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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/171785">171785</a></dd>
<dt>Author</dt> <dd>akling@apple.com</dd>
<dt>Date</dt> <dd>2014-07-29 20:51:31 -0700 (Tue, 29 Jul 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Crash when using 'em' units to specify font-size inside animation keyframe.
<https://webkit.org/b/135395>
<rdar://problem/17851910>
Source/WebCore:
We'd forgotten to initialize the "parent style" when resolving keyframe
styles, and this led to a crash in length conversion where the code
assumes a parent style will be present.
To keep this fix minimal, simply make the "parent style" a clone of the
base element style.
Reviewed by Simon Fraser.
Test: fast/animation/keyframe-with-font-size-in-em-units.html
* css/StyleResolver.cpp:
(WebCore::StyleResolver::styleForKeyframe):
LayoutTests:
Add a reduced test case to cover this bug.
Reviewed by Simon Fraser.
* fast/animation/keyframe-with-font-size-in-em-units-expected.txt: Added.
* fast/animation/keyframe-with-font-size-in-em-units.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="#trunkSourceWebCorecssStyleResolvercpp">trunk/Source/WebCore/css/StyleResolver.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastanimationkeyframewithfontsizeinemunitsexpectedtxt">trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastanimationkeyframewithfontsizeinemunitshtml">trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (171784 => 171785)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2014-07-30 03:48:54 UTC (rev 171784)
+++ trunk/LayoutTests/ChangeLog        2014-07-30 03:51:31 UTC (rev 171785)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2014-07-29 Andreas Kling <akling@apple.com>
+
+ Crash when using 'em' units to specify font-size inside animation keyframe.
+ <https://webkit.org/b/135395>
+ <rdar://problem/17851910>
+
+ Add a reduced test case to cover this bug.
+
+ Reviewed by Simon Fraser.
+
+ * fast/animation/keyframe-with-font-size-in-em-units-expected.txt: Added.
+ * fast/animation/keyframe-with-font-size-in-em-units.html: Added.
+
</ins><span class="cx"> 2014-07-29 Alexey Proskuryakov <ap@apple.com>
</span><span class="cx">
</span><span class="cx"> fast/borders/border-radius-on-subpixel-position-non-hidpi.html fails on Retina machines
</span></span></pre></div>
<a id="trunkLayoutTestsfastanimationkeyframewithfontsizeinemunitsexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units-expected.txt (0 => 171785)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units-expected.txt         (rev 0)
+++ trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units-expected.txt        2014-07-30 03:51:31 UTC (rev 171785)
</span><span class="lines">@@ -0,0 +1 @@
</span><ins>+PASS (no crash)
</ins></span></pre></div>
<a id="trunkLayoutTestsfastanimationkeyframewithfontsizeinemunitshtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units.html (0 => 171785)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units.html         (rev 0)
+++ trunk/LayoutTests/fast/animation/keyframe-with-font-size-in-em-units.html        2014-07-30 03:51:31 UTC (rev 171785)
</span><span class="lines">@@ -0,0 +1,23 @@
</span><ins>+<!DOCTYPE html>
+<html>
+<head>
+<style>
+@-webkit-keyframes foo {
+ from {
+ font-size: 2em;
+ }
+}
+#foo {
+ -webkit-animation: foo 1s linear 0.0s infinite;
+}
+</style>
+<script>
+if (window.testRunner)
+ testRunner.dumpAsText();
+</script>
+</head>
+<body>
+<div id="foo"></div>
+<span>PASS (no crash)</span>
+</body>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (171784 => 171785)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2014-07-30 03:48:54 UTC (rev 171784)
+++ trunk/Source/WebCore/ChangeLog        2014-07-30 03:51:31 UTC (rev 171785)
</span><span class="lines">@@ -1,3 +1,23 @@
</span><ins>+2014-07-29 Andreas Kling <akling@apple.com>
+
+ Crash when using 'em' units to specify font-size inside animation keyframe.
+ <https://webkit.org/b/135395>
+ <rdar://problem/17851910>
+
+ We'd forgotten to initialize the "parent style" when resolving keyframe
+ styles, and this led to a crash in length conversion where the code
+ assumes a parent style will be present.
+
+ To keep this fix minimal, simply make the "parent style" a clone of the
+ base element style.
+
+ Reviewed by Simon Fraser.
+
+ Test: fast/animation/keyframe-with-font-size-in-em-units.html
+
+ * css/StyleResolver.cpp:
+ (WebCore::StyleResolver::styleForKeyframe):
+
</ins><span class="cx"> 2014-07-29 Pratik Solanki <psolanki@apple.com>
</span><span class="cx">
</span><span class="cx"> [iOS] REGRESSION(r171526): PDF documents fail to load in WebKit1 with disk image caching enabled
</span></span></pre></div>
<a id="trunkSourceWebCorecssStyleResolvercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/StyleResolver.cpp (171784 => 171785)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/StyleResolver.cpp        2014-07-30 03:48:54 UTC (rev 171784)
+++ trunk/Source/WebCore/css/StyleResolver.cpp        2014-07-30 03:51:31 UTC (rev 171785)
</span><span class="lines">@@ -825,6 +825,7 @@
</span><span class="cx">
</span><span class="cx"> // Create the style
</span><span class="cx"> state.setStyle(RenderStyle::clone(elementStyle));
</span><ins>+ state.setParentStyle(RenderStyle::clone(elementStyle));
</ins><span class="cx"> state.setLineHeightValue(0);
</span><span class="cx">
</span><span class="cx"> TextDirection direction;
</span></span></pre>
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