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Simon Pieters
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[cssom] Disallow changes to @namespace if there are other rules, and allow changes otherwise. https://www.w3.org/Bugs/Public/show_bug.cgi?id=22208 
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‎cssom/Overview.html‎

Lines changed: 30 additions & 4 deletions
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@@ -1737,6 +1737,9 @@ <h3 id="css-rules"><span class="secno">6.4 </span>CSS Rules</h3>
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by CSS, then <a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a>
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a <code class="external"><a href="http://dom.spec.whatwg.org/#hierarchyrequesterror">HierarchyRequestError</a></code> exception. <a href="#refsCSS">[CSS]</a></p>
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<p class="note">For example, a CSS style sheet cannot contain an <code title="">@import</code> at-rule after a rule set.</li>
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<li><p>If <var title="">newRule</var> is an <code title="">@namespace</code> at-rule, and <var title="">list</var> contains anything other than
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<code title="">@charset</code> at-rules, <code title="">@import</code> at-rules, and <code title="">@namespace</code> at-rules,
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<a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a> an <code class="external"><a href="http://dom.spec.whatwg.org/#invalidstateerror">InvalidStateError</a></code> exception.
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<li><p>Insert <var>newRule</var> into <var>list</var> at the zero-indexed position <var>index</var>.<p></li>
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<li><p>Return <var>index</var>.</li>
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</ol>
@@ -1749,6 +1752,9 @@ <h3 id="css-rules"><span class="secno">6.4 </span>CSS Rules</h3>
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<li><p>If <var>index</var> is greater than or equal to <var>N</var>, then <a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a>
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an <code class="external"><a href="http://dom.spec.whatwg.org/#indexsizeerror">IndexSizeError</a></code> exception.</li>
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<li><p>Set <var>oldRule</var> to the <var>index</var>th item in <var>list</var>.</li>
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<li><p>If <var title="">oldRule</var> is an <code title="">@namespace</code> at-rule, and <var title="">list</var> contains anything other than
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<code title="">@charset</code> at-rules, <code title="">@import</code> at-rules, and <code title="">@namespace</code> at-rules,
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<a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a> an <code class="external"><a href="http://dom.spec.whatwg.org/#invalidstateerror">InvalidStateError</a></code> exception.
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<li><p>Remove rule <var>oldRule</var> from <var>list</var> at the zero-indexed position <var>index</var>.<p></li>
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</ol>
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@@ -1976,15 +1982,35 @@ <h4 id="the-cssnamespacerule-interface"><span class="secno">6.4.9 </span>The <co
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<p>The <code><a href="#cssnamespacerule">CSSNamespaceRule</a></code> interface represents a <code>@namespace</code> rule.</p>
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<pre class="idl">interface <dfn id="cssnamespacerule">CSSNamespaceRule</dfn> : <a href="#cssrule">CSSRule</a> {
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readonly attribute DOMString namespaceURI;
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readonly attribute DOMString? prefix;<!-- XXX not nullable? -->
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[TreatNullAs=EmptyString] attribute DOMString namespaceURI;
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[TreatNullAs=EmptyString] attribute DOMString prefix;
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};</pre>
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<p>The <dfn id="dom-cssnamespacerule-namespaceuri" title="dom-CSSNamespaceRule-namespaceURI"><code>namespaceURI</code></dfn> attribute must return the namespace of the <code>@namespace</code> rule.</p>
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<p>The <dfn id="dom-cssnamespacerule-namespaceuri" title="dom-CSSNamespaceRule-namespaceURI"><code>namespaceURI</code></dfn> attribute, on getting, must return the namespace of the
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<code>@namespace</code> rule. On setting, the <code title="dom-CSSNamespaceRule-namespaceURI"><a href="#dom-cssnamespacerule-namespaceuri">namespaceURI</a></code> attribute must run the following steps:</p>
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<ol>
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<li><p>Let <var title="">style sheet</var> be the value returned by <code title="dom-CSSRule-parentStyleSheet"><a href="#dom-cssrule-parentstylesheet">parentStyleSheet</a></code>.
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<li><p>Let <var title="">list</var> be the value returned by <code title="dom-CSSStyleSheet-cssRules"><a href="#dom-cssstylesheet-cssrules">cssRules</a></code> of <var title="">style sheet</var>, or
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<code title="">null</code> if <var title="">style sheet</var> is <code title="">null</code>.
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<li><p>If <var title="">list</var> is not <code title="">null</code> and contains anything other than
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<code title="">@charset</code> at-rules, <code title="">@import</code> at-rules, and <code title="">@namespace</code> at-rules,
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<a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a> an <code class="external"><a href="http://dom.spec.whatwg.org/#invalidstateerror">InvalidStateError</a></code> exception.
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<li><p>Set the namespace of the <code title="">@namespace</code> at-rule to the given value.
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</ol>
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<p>The <dfn id="dom-cssnamespacerule-prefix" title="dom-CSSNamespaceRule-prefix"><code>prefix</code></dfn> attribute must return the prefix of the <code>@namespace</code> rule or the
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empty string if there is no prefix.</p>
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empty string if there is no prefix. On setting, the <code title="dom-CSSNamespaceRule-prefix"><a href="#dom-cssnamespacerule-prefix">prefix</a></code> attribute must run the following steps:</p>
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<ol>
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<li><p>Let <var title="">style sheet</var> be the value returned by <code title="dom-CSSRule-parentStyleSheet"><a href="#dom-cssrule-parentstylesheet">parentStyleSheet</a></code>.
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<li><p>Let <var title="">list</var> be the value returned by <code title="dom-CSSStyleSheet-cssRules"><a href="#dom-cssstylesheet-cssrules">cssRules</a></code> of <var title="">style sheet</var>, or
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<code title="">null</code> if <var title="">style sheet</var> is <code title="">null</code>.
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<li><p>If <var title="">list</var> is not <code title="">null</code> and contains anything other than
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<code title="">@charset</code> at-rules, <code title="">@import</code> at-rules, and <code title="">@namespace</code> at-rules,
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<a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a> an <code class="external"><a href="http://dom.spec.whatwg.org/#invalidstateerror">InvalidStateError</a></code> exception.
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<li><p>Set the prefix of the <code title="">@namespace</code> at-rule to the given value.
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</ol>
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<h3 id="css-declaration-blocks"><span class="secno">6.5 </span>CSS Declaration Blocks</h3>

‎cssom/Overview.src.html‎

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@@ -1667,6 +1667,9 @@ <h3>CSS Rules</h3>
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by CSS, then <span data-anolis-spec='dom' title='concept-throw'>throw</span>
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a <code data-anolis-spec='dom'>HierarchyRequestError</code> exception. <span data-anolis-ref>CSS</span></p>
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<p class='note'>For example, a CSS style sheet cannot contain an <code title>@import</code> at-rule after a rule set.</p></li>
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<li><p>If <var title>newRule</var> is an <code title>@namespace</code> at-rule, and <var title>list</var> contains anything other than
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<code title>@charset</code> at-rules, <code title>@import</code> at-rules, and <code title>@namespace</code> at-rules,
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<span data-anolis-spec='dom' title='concept-throw'>throw</span> an <code data-anolis-spec=dom>InvalidStateError</code> exception.
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<li><p>Insert <var>newRule</var> into <var>list</var> at the zero-indexed position <var>index</var>.<p></li>
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<li><p>Return <var>index</var>.</p></li>
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</ol>
@@ -1679,6 +1682,9 @@ <h3>CSS Rules</h3>
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<li><p>If <var>index</var> is greater than or equal to <var>N</var>, then <span data-anolis-spec='dom' title='concept-throw'>throw</span>
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an <code data-anolis-spec='dom'>IndexSizeError</code> exception.</p></li>
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<li><p>Set <var>oldRule</var> to the <var>index</var>th item in <var>list</var>.</p></li>
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<li><p>If <var title>oldRule</var> is an <code title>@namespace</code> at-rule, and <var title>list</var> contains anything other than
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<code title>@charset</code> at-rules, <code title>@import</code> at-rules, and <code title>@namespace</code> at-rules,
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<span data-anolis-spec='dom' title='concept-throw'>throw</span> an <code data-anolis-spec=dom>InvalidStateError</code> exception.
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<li><p>Remove rule <var>oldRule</var> from <var>list</var> at the zero-indexed position <var>index</var>.<p></li>
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</ol>
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@@ -1906,15 +1912,35 @@ <h4>The <code title>CSSNamespaceRule</code> Interface</h4>
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<p>The <code>CSSNamespaceRule</code> interface represents a <code>@namespace</code> rule.</p>
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<pre class=idl>interface <dfn>CSSNamespaceRule</dfn> : <span>CSSRule</span> {
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readonly attribute DOMString namespaceURI;
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readonly attribute DOMString? prefix;<!-- XXX not nullable? -->
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[TreatNullAs=EmptyString] attribute DOMString namespaceURI;
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[TreatNullAs=EmptyString] attribute DOMString prefix;
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};</pre>
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<p>The <dfn title=dom-CSSNamespaceRule-namespaceURI><code>namespaceURI</code></dfn> attribute must return the namespace of the <code>@namespace</code> rule.</p>
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<p>The <dfn title=dom-CSSNamespaceRule-namespaceURI><code>namespaceURI</code></dfn> attribute, on getting, must return the namespace of the
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<code>@namespace</code> rule. On setting, the <code title=dom-CSSNamespaceRule-namespaceURI>namespaceURI</code> attribute must run the following steps:</p>
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<ol>
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<li><p>Let <var title>style sheet</var> be the value returned by <code title=dom-CSSRule-parentStyleSheet>parentStyleSheet</code>.
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<li><p>Let <var title>list</var> be the value returned by <code title=dom-CSSStyleSheet-cssRules>cssRules</code> of <var title>style sheet</var>, or
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<code title>null</code> if <var title>style sheet</var> is <code title>null</code>.
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<li><p>If <var title>list</var> is not <code title>null</code> and contains anything other than
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<code title>@charset</code> at-rules, <code title>@import</code> at-rules, and <code title>@namespace</code> at-rules,
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<span data-anolis-spec='dom' title='concept-throw'>throw</span> an <code data-anolis-spec=dom>InvalidStateError</code> exception.
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<li><p>Set the namespace of the <code title>@namespace</code> at-rule to the given value.
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</ol>
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<p>The <dfn title=dom-CSSNamespaceRule-prefix><code>prefix</code></dfn> attribute must return the prefix of the <code>@namespace</code> rule or the
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empty string if there is no prefix.</p>
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empty string if there is no prefix. On setting, the <code title=dom-CSSNamespaceRule-prefix>prefix</code> attribute must run the following steps:</p>
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<ol>
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<li><p>Let <var title>style sheet</var> be the value returned by <code title=dom-CSSRule-parentStyleSheet>parentStyleSheet</code>.
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<li><p>Let <var title>list</var> be the value returned by <code title=dom-CSSStyleSheet-cssRules>cssRules</code> of <var title>style sheet</var>, or
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<code title>null</code> if <var title>style sheet</var> is <code title>null</code>.
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<li><p>If <var title>list</var> is not <code title>null</code> and contains anything other than
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<code title>@charset</code> at-rules, <code title>@import</code> at-rules, and <code title>@namespace</code> at-rules,
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<span data-anolis-spec='dom' title='concept-throw'>throw</span> an <code data-anolis-spec=dom>InvalidStateError</code> exception.
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<li><p>Set the prefix of the <code title>@namespace</code> at-rule to the given value.
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</ol>
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<h3>CSS Declaration Blocks</h3>

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