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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/198553">198553</a></dd>
<dt>Author</dt> <dd>antti@apple.com</dd>
<dt>Date</dt> <dd>2016-03-22 14:31:16 -0700 (Tue, 22 Mar 2016)</dd>
</dl>

<h3>Log Message</h3>
<pre>Non-const DocumentRuleSets::features() does not check default style version
https://bugs.webkit.org/show_bug.cgi?id=155766

Reviewed by Andreas Kling.

This may leave it out of date when the default stylesheet expands.

No test, don't know how to hit this with current codebase. With some further optimizations
it starts affecting some tests involving UA media control stylesheets.

* css/DocumentRuleSets.h:
(WebCore::DocumentRuleSets::mutableFeatures):

    Check the default style version number in non-const case too.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorecssDocumentRuleSetsh">trunk/Source/WebCore/css/DocumentRuleSets.h</a></li>
<li><a href="#trunkSourceWebCorecssStyleBuilderCustomh">trunk/Source/WebCore/css/StyleBuilderCustom.h</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (198552 => 198553)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2016-03-22 21:28:43 UTC (rev 198552)
+++ trunk/Source/WebCore/ChangeLog        2016-03-22 21:31:16 UTC (rev 198553)
</span><span class="lines">@@ -1,3 +1,20 @@
</span><ins>+2016-03-22  Antti Koivisto  &lt;antti@apple.com&gt;
+
+        Non-const DocumentRuleSets::features() does not check default style version
+        https://bugs.webkit.org/show_bug.cgi?id=155766
+
+        Reviewed by Andreas Kling.
+
+        This may leave it out of date when the default stylesheet expands.
+
+        No test, don't know how to hit this with current codebase. With some further optimizations
+        it starts affecting some tests involving UA media control stylesheets.
+
+        * css/DocumentRuleSets.h:
+        (WebCore::DocumentRuleSets::mutableFeatures):
+
+            Check the default style version number in non-const case too.
+
</ins><span class="cx"> 2016-03-22  Daniel Bates  &lt;dabates@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         CSP: Should only execute &lt;script&gt; or apply &lt;style&gt; if its hash appears in all policies
</span></span></pre></div>
<a id="trunkSourceWebCorecssDocumentRuleSetsh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/DocumentRuleSets.h (198552 => 198553)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/DocumentRuleSets.h        2016-03-22 21:28:43 UTC (rev 198552)
+++ trunk/Source/WebCore/css/DocumentRuleSets.h        2016-03-22 21:31:16 UTC (rev 198553)
</span><span class="lines">@@ -46,7 +46,6 @@
</span><span class="cx">     ~DocumentRuleSets();
</span><span class="cx">     RuleSet* authorStyle() const { return m_authorStyle.get(); }
</span><span class="cx">     RuleSet* userStyle() const { return m_userStyle.get(); }
</span><del>-    RuleFeatureSet&amp; features() { return m_features; }
</del><span class="cx">     const RuleFeatureSet&amp; features() const;
</span><span class="cx">     RuleSet* sibling() const { return m_siblingRuleSet.get(); }
</span><span class="cx">     RuleSet* uncommonAttribute() const { return m_uncommonAttributeRuleSet.get(); }
</span><span class="lines">@@ -62,6 +61,8 @@
</span><span class="cx">     void resetAuthorStyle();
</span><span class="cx">     void appendAuthorStyleSheets(const Vector&lt;RefPtr&lt;CSSStyleSheet&gt;&gt;&amp;, MediaQueryEvaluator*, InspectorCSSOMWrappers&amp;, StyleResolver*);
</span><span class="cx"> 
</span><ins>+    RuleFeatureSet&amp; mutableFeatures();
+
</ins><span class="cx"> private:
</span><span class="cx">     void collectFeatures() const;
</span><span class="cx">     void collectRulesFromUserStyleSheets(const Vector&lt;RefPtr&lt;CSSStyleSheet&gt;&gt;&amp;, RuleSet&amp; userStyle, const MediaQueryEvaluator&amp;, StyleResolver&amp;);
</span><span class="lines">@@ -84,6 +85,14 @@
</span><span class="cx">     return m_features;
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+// FIXME: There should be just the const version.
+inline RuleFeatureSet&amp; DocumentRuleSets::mutableFeatures()
+{
+    if (m_defaultStyleVersionOnFeatureCollection &lt; CSSDefaultStyleSheets::defaultStyleVersion)
+        collectFeatures();
+    return m_features;
+}
+
</ins><span class="cx"> } // namespace WebCore
</span><span class="cx"> 
</span><span class="cx"> #endif // DocumentRuleSets_h
</span></span></pre></div>
<a id="trunkSourceWebCorecssStyleBuilderCustomh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/StyleBuilderCustom.h (198552 => 198553)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/StyleBuilderCustom.h        2016-03-22 21:28:43 UTC (rev 198552)
+++ trunk/Source/WebCore/css/StyleBuilderCustom.h        2016-03-22 21:31:16 UTC (rev 198553)
</span><span class="lines">@@ -1345,8 +1345,8 @@
</span><span class="cx">             styleResolver.style()-&gt;setContent(value.isNull() ? emptyAtom : value.impl(), didSet);
</span><span class="cx">             didSet = true;
</span><span class="cx">             // Register the fact that the attribute value affects the style.
</span><del>-            styleResolver.ruleSets().features().attributeCanonicalLocalNamesInRules.add(attr.localName().impl());
-            styleResolver.ruleSets().features().attributeLocalNamesInRules.add(attr.localName().impl());
</del><ins>+            styleResolver.ruleSets().mutableFeatures().attributeCanonicalLocalNamesInRules.add(attr.localName().impl());
+            styleResolver.ruleSets().mutableFeatures().attributeLocalNamesInRules.add(attr.localName().impl());
</ins><span class="cx">         } else if (contentValue.isCounter()) {
</span><span class="cx">             Counter* counterValue = contentValue.getCounterValue();
</span><span class="cx">             EListStyleType listStyleType = NoneListStyle;
</span><span class="lines">@@ -1715,8 +1715,8 @@
</span><span class="cx">         styleResolver.style()-&gt;setContentAltText(value.isNull() ? emptyAtom : value);
</span><span class="cx"> 
</span><span class="cx">         // Register the fact that the attribute value affects the style.
</span><del>-        styleResolver.ruleSets().features().attributeCanonicalLocalNamesInRules.add(attr.localName().impl());
-        styleResolver.ruleSets().features().attributeLocalNamesInRules.add(attr.localName().impl());
</del><ins>+        styleResolver.ruleSets().mutableFeatures().attributeCanonicalLocalNamesInRules.add(attr.localName().impl());
+        styleResolver.ruleSets().mutableFeatures().attributeLocalNamesInRules.add(attr.localName().impl());
</ins><span class="cx">     } else
</span><span class="cx">         styleResolver.style()-&gt;setContentAltText(emptyAtom);
</span><span class="cx"> }
</span></span></pre>
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