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<title>[175576] trunk</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/175576">175576</a></dd>
<dt>Author</dt> <dd>benjamin@webkit.org</dd>
<dt>Date</dt> <dd>2014-11-04 13:02:27 -0800 (Tue, 04 Nov 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>When computing the specificity of selectors, use saturated arithmetic per component
https://bugs.webkit.org/show_bug.cgi?id=138336
Patch by Benjamin Poulain <bpoulain@apple.com> on 2014-11-04
Reviewed by Andreas Kling.
Source/WebCore:
The code handling overflow in CSSSelector::specificity() was assuming that the value
returned by specificityForOneSelector() can only overflow one field at a time.
That assumption is no longer correct with the extended :not(). It is now possible to have
a complex selector saturating multiple fields inside a single :not().
This patch solves the problem by considering each field independently.
Test: fast/selectors/specificity-overflow-2.html
* css/CSSSelector.cpp:
(WebCore::CSSSelector::specificity):
LayoutTests:
* fast/selectors/specificity-overflow-2-expected.txt: Added.
* fast/selectors/specificity-overflow-2.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="#trunkSourceWebCorecssCSSSelectorcpp">trunk/Source/WebCore/css/CSSSelector.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastselectorsspecificityoverflow2expectedtxt">trunk/LayoutTests/fast/selectors/specificity-overflow-2-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastselectorsspecificityoverflow2html">trunk/LayoutTests/fast/selectors/specificity-overflow-2.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (175575 => 175576)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2014-11-04 20:56:31 UTC (rev 175575)
+++ trunk/LayoutTests/ChangeLog 2014-11-04 21:02:27 UTC (rev 175576)
</span><span class="lines">@@ -1,3 +1,13 @@
</span><ins>+2014-11-04 Benjamin Poulain <bpoulain@apple.com>
+
+ When computing the specificity of selectors, use saturated arithmetic per component
+ https://bugs.webkit.org/show_bug.cgi?id=138336
+
+ Reviewed by Andreas Kling.
+
+ * fast/selectors/specificity-overflow-2-expected.txt: Added.
+ * fast/selectors/specificity-overflow-2.html: Added.
+
</ins><span class="cx"> 2014-11-04 Darin Adler <darin@apple.com>
</span><span class="cx">
</span><span class="cx"> * TestExpectations: Turn off http/tests/multipart/stop-crash.html.
</span></span></pre></div>
<a id="trunkLayoutTestsfastselectorsspecificityoverflow2expectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/selectors/specificity-overflow-2-expected.txt (0 => 175576)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/selectors/specificity-overflow-2-expected.txt (rev 0)
+++ trunk/LayoutTests/fast/selectors/specificity-overflow-2-expected.txt 2014-11-04 21:02:27 UTC (rev 175576)
</span><span class="lines">@@ -0,0 +1,13 @@
</span><ins>+Verify that saturating multiple component of the specificity works correctly.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS getComputedStyle(document.getElementById('target')).color is "rgb(7, 8, 9)"
+PASS getComputedStyle(document.getElementById('target')).backgroundColor is "rgb(10, 11, 12)"
+PASS getComputedStyle(document.getElementById('target')).margin is "0px"
+PASS getComputedStyle(document.getElementById('target')).padding is "0px"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastselectorsspecificityoverflow2html"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/selectors/specificity-overflow-2.html (0 => 175576)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/selectors/specificity-overflow-2.html (rev 0)
+++ trunk/LayoutTests/fast/selectors/specificity-overflow-2.html 2014-11-04 21:02:27 UTC (rev 175576)
</span><span class="lines">@@ -0,0 +1,61 @@
</span><ins>+<!DOCTYPE html>
+<head>
+ <style>
+ /* Saturate A and B fields: (255, 255, 0). */
+ .target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.
target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#ta
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+ color: rgb(1, 2, 3);
+ }
+
+ /* Saturate B and C fields: (0, 255, 255). */
+ target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):no
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+ background-color: rgb(4, 5, 6);
+ }
+
+ /* Saturate A and C fields: (255, 0, 255). */
+ target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):no
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+ margin: 25px;
+ }
+
+ /* Saturate everything: (255, 255, 255). */
+ target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):no
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+ padding: 25px;
+ }
+
+ /* Overflow the A and B fields, the right output should be saturating to (255, 255, 0). Due to the position, this should override the previous (255, 255, 0). */
+ .target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.
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+ color: rgb(7, 8, 9);
+ }
+
+ /* Overflow the B and C fields, the right output should be saturating to (0, 255, 255). */
+ target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):no
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get.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target) {
+ background-color: rgb(10, 11, 12);
+ }
+
+ /* Overflow A and C fields. */
+ target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):no
t(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foo
bar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar)#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#targ
et#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target:not(:not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(
target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(targe
t):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):no
t(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target)#target#target#target#target#target#target#target#target
#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#t
arget#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target) {
+ margin: 0;
+ }
+
+ /* -Overflow everyone.
+ -What do you mean "everyone"?
+ -EVERYONE!
+ */
+ target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.t
arget.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar)
:not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(
foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar):not(foobar)#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target
#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#t
arget#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target:not(:not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(ta
rget):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target)
:not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(
target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target):not(target).target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.tar
get.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.targe
t.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target.target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#
target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target#target) {
+ padding: 0;
+ }
+
+ </style>
+ <script src='../../resources/js-test-pre.js'></script>
+</head>
+<body>
+ <target id="target" class="target"></target>
+ <script>
+ description("Verify that saturating multiple component of the specificity works correctly.");
+
+ shouldBeEqualToString("getComputedStyle(document.getElementById('target')).color", "rgb(7, 8, 9)");
+ shouldBeEqualToString("getComputedStyle(document.getElementById('target')).backgroundColor", "rgb(10, 11, 12)");
+ shouldBeEqualToString("getComputedStyle(document.getElementById('target')).margin", "0px");
+ shouldBeEqualToString("getComputedStyle(document.getElementById('target')).padding", "0px");
+ </script>
+<script src='../../resources/js-test-post.js'></script>
+</body>
</ins><span class="cx">\ No newline at end of file
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (175575 => 175576)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2014-11-04 20:56:31 UTC (rev 175575)
+++ trunk/Source/WebCore/ChangeLog 2014-11-04 21:02:27 UTC (rev 175576)
</span><span class="lines">@@ -1,3 +1,23 @@
</span><ins>+2014-11-04 Benjamin Poulain <bpoulain@apple.com>
+
+ When computing the specificity of selectors, use saturated arithmetic per component
+ https://bugs.webkit.org/show_bug.cgi?id=138336
+
+ Reviewed by Andreas Kling.
+
+ The code handling overflow in CSSSelector::specificity() was assuming that the value
+ returned by specificityForOneSelector() can only overflow one field at a time.
+
+ That assumption is no longer correct with the extended :not(). It is now possible to have
+ a complex selector saturating multiple fields inside a single :not().
+
+ This patch solves the problem by considering each field independently.
+
+ Test: fast/selectors/specificity-overflow-2.html
+
+ * css/CSSSelector.cpp:
+ (WebCore::CSSSelector::specificity):
+
</ins><span class="cx"> 2014-11-04 Zalan Bujtas <zalan@apple.com>
</span><span class="cx">
</span><span class="cx"> Windows build fix after r175565.
</span></span></pre></div>
<a id="trunkSourceWebCorecssCSSSelectorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/CSSSelector.cpp (175575 => 175576)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/CSSSelector.cpp 2014-11-04 20:56:31 UTC (rev 175575)
+++ trunk/Source/WebCore/css/CSSSelector.cpp 2014-11-04 21:02:27 UTC (rev 175576)
</span><span class="lines">@@ -64,20 +64,28 @@
</span><span class="cx"> if (isForPage())
</span><span class="cx"> return specificityForPage() & maxValueMask;
</span><span class="cx">
</span><del>- unsigned total = 0;
- unsigned temp = 0;
</del><ins>+ unsigned total = specificityForOneSelector();
</ins><span class="cx">
</span><del>- for (const CSSSelector* selector = this; selector; selector = selector->tagHistory()) {
- temp = total + selector->specificityForOneSelector();
- // Clamp each component to its max in the case of overflow.
- if ((temp & idMask) < (total & idMask))
</del><ins>+ for (const CSSSelector* selector = this->tagHistory(); selector; selector = selector->tagHistory()) {
+ unsigned selectorSpecificity = selector->specificityForOneSelector();
+
+ unsigned newIdValue = (selectorSpecificity & idMask);
+ if (((total & idMask) + newIdValue) & ~idMask)
</ins><span class="cx"> total |= idMask;
</span><del>- else if ((temp & classMask) < (total & classMask))
</del><ins>+ else
+ total += newIdValue;
+
+ unsigned newClassValue = (selectorSpecificity & classMask);
+ if (((total & classMask) + newClassValue) & ~classMask)
</ins><span class="cx"> total |= classMask;
</span><del>- else if ((temp & elementMask) < (total & elementMask))
</del><ins>+ else
+ total += newClassValue;
+
+ unsigned newElementValue = (selectorSpecificity & elementMask);
+ if (((total & elementMask) + newElementValue) & ~elementMask)
</ins><span class="cx"> total |= elementMask;
</span><span class="cx"> else
</span><del>- total = temp;
</del><ins>+ total += newElementValue;
</ins><span class="cx"> }
</span><span class="cx"> return total;
</span><span class="cx"> }
</span></span></pre>
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