[css-shapes] use SVG rules for edge cases in rounded rect radii

Author: astearns

css-shapes/Overview.html

@@ -12,7 +12,7 @@
    rel=dcterms.rights>
   <meta content="CSS Shapes Module Level 1" name=dcterms.title>
   <meta content=text name=dcterms.type>
-  <meta content=2013-05-20 name=dcterms.date>
+  <meta content=2013-06-05 name=dcterms.date>
   <meta content="Vincent Hardy" name=dcterms.creator>
   <meta content="Rossen Atanassov" name=dcterms.creator>
   <meta content="Alan Stearns" name=dcterms.creator>
@@ -55,14 +55,14 @@
 
    <h1 id=css-shapes-module>CSS Shapes Module Level 1</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 20 May 2013</h2>
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 5 June 2013</h2>
 
    <dl>
     <dt>This version:
 
     <dd><a
      href="http://dev.w3.org/csswg/css-shapes/">http://dev.w3.org/csswg/css-shapes/</a></dd>
-    <!--<dd><a href="http://dev.w3.org/csswg/css-shapes/">http://www.w3.org/TR/2013/WD-css-shapes-20130520/</a></dd>-->
+    <!--<dd><a href="http://dev.w3.org/csswg/css-shapes/">http://www.w3.org/TR/2013/WD-css-shapes-20130605/</a></dd>-->
 
     <dt>Latest version:
 
@@ -377,7 +377,14 @@ <h4 id=supported-basic-shapes><span class=secno>3.2.1. </span>Supported
       <strong> rx</strong> and <strong>ry</strong>. For rounded rectangles
       they define the x-axis radius and y-axis radius of the ellipse used to
       round off the corners of the rectangle. Negative values for rx and ry
-      are invalid.
+      are invalid. Implicit values may apply if one or the other of these
+      values are unspecified or invalid, and clamping may occur if a
+      specified value would result in a negative straight rectangle segment.
+      The corner radii rules in <a
+      href="http://www.w3.org/TR/SVG/shapes.html#RectElement">the ‘<code
+      class=property>rect</code>’ element</a> in the SVG recommendation
+      define these edge cases <a href="#SVG11"
+      rel=biblioentry>[SVG11]<!--{{!SVG11}}--></a>.
     </ul>
 
    <dt><dfn
@@ -719,7 +726,7 @@ <h4 id=shape-outside-property><span class=secno>3.4.1. </span>The ‘<a
   </dl>
 
   <dl>
-   <dt><dfn id=basic-shape
+   <dt><dfn id=ltbasic-shapegt
     title="'shape-outside'!!'&lt;basic-shape&gt;'">&lt;basic-shape&gt;</dfn>
 
    <dd> The shape is computed based on the values of one of ‘<a
@@ -732,7 +739,7 @@ <h4 id=shape-outside-property><span class=secno>3.4.1. </span>The ‘<a
   </dl>
 
   <dl>
-   <dt><dfn id=uri
+   <dt><dfn id=lturigt
     title="'shape-outside'!!'&lt;uri&gt;'">&lt;uri&gt;</dfn>
 
    <dd> If the &lt;uri&gt; references
@@ -803,7 +810,7 @@ <h4 id=shape-image-threshold-property><span class=secno>3.4.2. </span>The
   <p>The values of this property have the following meanings:
 
   <dl>
-   <dt><dfn id=alphavalue
+   <dt><dfn id=ltalphavaluegt
     title="'shape-image-threshold'!!'&lt;alphavalue&gt;'">&lt;alphavalue&gt;</dfn>
 
    <dd> A &lt;number&gt; value used to set the threshold used for extracting
@@ -1048,10 +1055,10 @@ <h3 class=no-num id=normative-references>Normative references</h3>
    <dt id=CSS3VAL>[CSS3VAL]
 
    <dd>Håkon Wium Lie; Tab Atkins; Elika J. Etemad. <a
-    href="http://www.w3.org/TR/2012/CR-css3-values-20120828/"><cite>CSS
-    Values and Units Module Level 3.</cite></a> 28 August 2012. W3C Candidate
+    href="http://www.w3.org/TR/2013/CR-css3-values-20130404/"><cite>CSS
+    Values and Units Module Level 3.</cite></a> 4 April 2013. W3C Candidate
     Recommendation. (Work in progress.) URL: <a
-    href="http://www.w3.org/TR/2012/CR-css3-values-20120828/">http://www.w3.org/TR/2012/CR-css3-values-20120828/</a>
+    href="http://www.w3.org/TR/2013/CR-css3-values-20130404/">http://www.w3.org/TR/2013/CR-css3-values-20130404/</a>
    </dd>
    <!---->
 
@@ -1117,7 +1124,7 @@ <h2 class=no-num id=index>Index</h2>
    <li>'shape-image-threshold', <a href="#shape-image-threshold"
     title="section 3.4.2."><strong>3.4.2.</strong></a>
     <ul>
-     <li>'&lt;alphavalue&gt;', <a href="#alphavalue"
+     <li>'&lt;alphavalue&gt;', <a href="#ltalphavaluegt"
       title="section 3.4.2."><strong>3.4.2.</strong></a>
     </ul>
 
@@ -1130,10 +1137,10 @@ <h2 class=no-num id=index>Index</h2>
      <li>'auto', <a href="#auto"
       title="section 3.4.1."><strong>3.4.1.</strong></a>
 
-     <li>'&lt;basic-shape&gt;', <a href="#basic-shape"
+     <li>'&lt;basic-shape&gt;', <a href="#ltbasic-shapegt"
       title="section 3.4.1."><strong>3.4.1.</strong></a>
 
-     <li>'&lt;uri&gt;', <a href="#uri"
+     <li>'&lt;uri&gt;', <a href="#lturigt"
       title="section 3.4.1."><strong>3.4.1.</strong></a>
     </ul>
 

css-shapes/Overview.src.html

@@ -256,7 +256,13 @@ <h4 id="supported-basic-shapes">Supported Shapes</h4>
                       the x-axis radius and y-axis radius 
                       of the ellipse used to round off 
                       the corners of the rectangle. 
-                      Negative values for rx and ry are invalid.
+                      Negative values for rx and ry are invalid. 
+                      Implicit values may apply if one or the other 
+                      of these values are unspecified or invalid, 
+                      and clamping may occur if a specified value 
+                      would result in a negative straight rectangle segment. 
+                      The corner radii rules in <a href="http://www.w3.org/TR/SVG/shapes.html#RectElement">the 'rect' element</a> 
+                      in the SVG recommendation define these edge cases [[!SVG11]].
                   </li>
               </ul>
           </dd>