Add the 'expandedSelectorText' property to the CSSStyleRule interface.

Author: tabatkins

css3-hierarchies/Overview.html

@@ -405,6 +405,7 @@ <h2 id=cssom><span class=secno>4. </span> CSS Object Model Modifications</h2>
   <pre class=idl>
 interface CSSStyleRule : CSSRule {
            attribute DOMString selectorText;
+  <ins>readonly attribute expandedSelectorText;</ins>
   <ins>readonly attribute CSSRuleList cssRules;</ins>
   readonly attribute CSSStyleDeclaration style;
 };</pre>
@@ -413,6 +414,15 @@ <h2 id=cssom><span class=secno>4. </span> CSS Object Model Modifications</h2>
    <code>CSSRuleList</code> object for the list of CSS rules specified within
    the style rule.
 
+  <p>The <code>expandedSelectorText</code> attribute must return a
+   <code>DOMString</code> object containing the result of replacing the
+   &lsquo;<code class=css>&amp;</code>&rsquo; selector in the
+   <code>selectorText</code> attribute with the
+   <code>expandedSelectorText</code> attribute from the parent rule. If the
+   rule has no parent rule, the <code>expandedSelectorText</code> attribute
+   must return a <code>DOMString</code> object containing the same text as
+   the <code>selectorText</code> attribute.
+
   <h2 id=conformance><span class=secno>5. </span> Conformance</h2>
 
   <h3 id=conventions><span class=secno>5.1. </span> Document Conventions</h3>

css3-hierarchies/Overview.src.html

@@ -278,12 +278,15 @@ <h2 id="cssom">
 	<pre class='idl'>
 interface CSSStyleRule : CSSRule {
            attribute DOMString selectorText;
+  <ins>readonly attribute expandedSelectorText;</ins>
   <ins>readonly attribute CSSRuleList cssRules;</ins>
   readonly attribute CSSStyleDeclaration style;
 };</pre>
 
 	<p>The <code>cssRules</code> attribute must return a <code>CSSRuleList</code> object for the list of CSS rules specified within the style rule.</p>
 
+	<p>The <code>expandedSelectorText</code> attribute must return a <code>DOMString</code> object containing the result of replacing the ''&amp;'' selector in the <code>selectorText</code> attribute with the <code>expandedSelectorText</code> attribute from the parent rule.  If the rule has no parent rule, the <code>expandedSelectorText</code> attribute must return a <code>DOMString</code> object containing the same text as the <code>selectorText</code> attribute.</p>
+
 <h2 id="conformance">
 Conformance</h2>