Make invalid sizes skip to the next source, or ignore the srcset attr…

…ibute for img. Fixes ResponsiveImagesCG#113

index.html

@@ -552,14 +552,14 @@
 </p>
   <h1 class="p-name no-ref" id=title>The picture Element</h1>
   <h2 class="no-num no-toc no-ref heading settled heading" id=subtitle><span class=content>Editor’s Draft,
-    <span class=dt-updated><span class=value-title title=20140226>26 February 2014</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20140227>27 February 2014</span></span></span></h2>
   <div data-fill-with=spec-metadata><dl><dt>This version:<dd><a class=u-url href=http://picture.responsiveimages.org>http://picture.responsiveimages.org</a><dt>Editor’s Draft:<dd><a href=http://picture.responsiveimages.org>http://picture.responsiveimages.org</a><dt>Test Suite:<dd>None Yet<dt>Editors:
 <dd class="p-author h-card vcard"><a class="p-name fn u-url url" href=http://xanthir.com/contact/>Tab Atkins</a> (<span class="p-org org">Google</span>)<dd class="p-author h-card vcard"><span class="p-name fn">Marcos Cáceres</span> (<span class="p-org org">Mozilla</span>)<dd class="p-author h-card vcard"><a class="p-name fn u-url url" href=http://matmarquis.com/>Mat Marquis</a><dd class="p-author h-card vcard"><a class="p-name fn u-url url" href=http://blog.yoav.ws/>Yoav Weiss</a><dd class="p-author h-card vcard"><a class="p-name fn u-email email" href=mailto:[email protected]>Simon Pieters</a> (<span class="p-org org">Opera Software</span>)<dt>Version History:<dd><a href=https://github.com/ResponsiveImagesCG/picture-element/commits/gh-pages>Commit History</a><dd><a href=https://twitter.com/respimg_commits>Github commits on Twitter</a><dt>Participate:<dd><a href=http://w3c.responsiveimages.org>Join the Responsive Images Community Group</a><dd><a href=http://list.responsiveimages.org>Public Mailing List</a><dd><a href=irc://irc.w3.org:6665/#respimg>IRC: #respimg on W3C’s IRC</a><dd><a href=https://twitter.com/respimg>Twitter</a><dd><a href=https://github.com/ResponsiveImagesCG/picture-element>Github</a></dl></div>
   <div data-fill-with=warning></div>
   <p class=copyright data-fill-with=copyright><a href=http://creativecommons.org/publicdomain/zero/1.0/ rel=license><img alt=CC0 src=http://i.creativecommons.org/p/zero/1.0/80x15.png></a>
 To the extent possible under law, the editors have waived all copyright
 and related or neighboring rights to this work.
-In addition, as of 26 February 2014,
+In addition, as of 27 February 2014,
 the editors have made this specification available under the
 <a href=http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0 rel=license>Open Web Foundation Agreement Version 1.0</a>,
 which is available at http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0.
@@ -894,7 +894,8 @@ <h2 class="heading settled heading" data-level=3 id=the-picture-element><span cl
 	and optionally either a density descriptor,
 	or a width descriptor.
 
-<p>	A <dfn data-dfn-type=dfn data-export="" id=source-size-list>source size list<a class=self-link href=#source-size-list></a></dfn> is a list of zero or more pairs of a <a data-link-type=dfn href=http://dev.w3.org/csswg/mediaqueries-4/#media-query title="media query">media query</a> and a <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#length-value title="<length>">&lt;length&gt;</a>,
+<p>	A <dfn data-dfn-type=dfn data-export="" id=source-size-list>source size list<a class=self-link href=#source-size-list></a></dfn> is either an error or a list of
+	zero or more pairs of a <a data-link-type=dfn href=http://dev.w3.org/csswg/mediaqueries-4/#media-query title="media query">media query</a> and a <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#length-value title="<length>">&lt;length&gt;</a>,
 	and optionally a default <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#length-value title="<length>">&lt;length&gt;</a>.
 
 <p>	The <dfn data-dfn-type=dfn data-noexport="" id=relevant-mutations>relevant mutations<a class=self-link href=#relevant-mutations></a></dfn> for an <a data-link-type=element href=http://www.w3.org/html/wg/drafts/html/CR/embedded-content-0.html#the-img-element title=img>img</a> element are as follows:
@@ -1081,6 +1082,11 @@ <h4 class="heading settled heading" data-level=3.1.2 id=update-source-sets><span
 							and let <var>source set</var>’s <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a> be the returned value.
 							Otherwise,
 							let <var>source set</var>’s <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a> be an empty <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a>.
+
+						<li>
+							If the <var>source set</var>’s <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a> is an error, let <var>source
+							set</var> be an empty <a data-link-type=dfn href=#source-set title="source set">source set</a>.
+
 						<li>
 							If <var>child</var> has a <a data-link-for=img data-link-type=element-attr title=src>src</a> attribute and <var>source set</var> does not contain a
 							<var>source</var> with a <a class="production css-code" data-link-type=type href=http://dev.w3.org/csswg/css-values-3/#resolution-value title="<resolution>">&lt;resolution&gt;</a> value of 1,
@@ -1124,6 +1130,10 @@ <h4 class="heading settled heading" data-level=3.1.2 id=update-source-sets><span
 					Otherwise,
 					let <var>source set</var>’s <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a> be an empty <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a>.
 
+				<li>
+					If the <var>source set</var>’s <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a> is an error, continue
+					to the next child.
+
 				<li>
 					If <var>child</var> has a <a data-link-for=source data-link-type=element-attr title=type>type</a> attribute,
 					and its value is an unknown or unsupported MIME type,
@@ -1347,7 +1357,7 @@ <h4 class="heading settled heading" data-level=3.1.4 id=parse-sizes-attr><span c
 <p>	The above grammar must be interpreted per the grammar definition in <a data-biblio-type=normative data-link-type=biblio href=#css3val title=css3val>[CSS3VAL]</a>.
 
 <p>	If the value does not parse successfully according to the above grammar,
-	return an empty <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a>.
+	return an error.
 
 <p>	Otherwise,
 	let <var>source size list</var> initially be an empty <a data-link-type=dfn href=#source-size-list title="source size list">source size list</a>.

index.src.html

@@ -342,7 +342,8 @@ <h2 id='the-picture-element'>
 	and optionally either a density descriptor,
 	or a width descriptor.
 
-	A <dfn export>source size list</dfn> is a list of zero or more pairs of a <a>media query</a> and a <<length>>,
+	A <dfn export>source size list</dfn> is either an error or a list of
+	zero or more pairs of a <a>media query</a> and a <<length>>,
 	and optionally a default <<length>>.
 
 	The <dfn>relevant mutations</dfn> for an <a element>img</a> element are as follows:
@@ -529,6 +530,11 @@ <h4 id='update-source-sets'>
 							and let <var>source set</var>’s <a>source size list</a> be the returned value.
 							Otherwise,
 							let <var>source set</var>’s <a>source size list</a> be an empty <a>source size list</a>.
+
+						<li>
+							If the <var>source set</var>’s <a>source size list</a> is an error, let <var>source
+							set</var> be an empty <a>source set</a>.
+
 						<li>
 							If <var>child</var> has a <a element-attr for="img">src</a> attribute and <var>source set</var> does not contain a
 							<var>source</var> with a <<resolution>> value of 1,
@@ -572,6 +578,10 @@ <h4 id='update-source-sets'>
 					Otherwise,
 					let <var>source set</var>’s <a>source size list</a> be an empty <a>source size list</a>.
 
+				<li>
+					If the <var>source set</var>’s <a>source size list</a> is an error, continue
+					to the next child.
+
 				<li>
 					If <var>child</var> has a <a element-attr for="source">type</a> attribute,
 					and its value is an unknown or unsupported MIME type,
@@ -797,7 +807,7 @@ <h4 id='parse-sizes-attr'>
 	The above grammar must be interpreted per the grammar definition in [[!CSS3VAL]].
 
 	If the value does not parse successfully according to the above grammar,
-	return an empty <a>source size list</a>.
+	return an error.
 
 	Otherwise,
 	let <var>source size list</var> initially be an empty <a>source size list</a>.