removed exceptions from the Region interface

Author: astearns

css3-regions/Overview.html

@@ -2035,7 +2035,9 @@ <h3 id=the-region-interface><span class=secno>6.2. </span>The Region
     chain, that means the <a href="#named-flow0">named flow</a> content is
     further fitted in subsequent regions. In this last case, note that the <a
     href="#named-flow0">named flow</a> fragment may be empty (for example if
-    the region is too small to accommodate any content).
+    the region is too small to accommodate any content). This value is
+    returned if the <a href="#css-region">region</a> object is not (or no
+    longer) a region.
 
    <dt>‘<code class=property>empty</code>’
 
@@ -2091,7 +2093,8 @@ <h3 id=the-region-interface><span class=secno>6.2. </span>The Region
    fragmented across region boundaries, the <a
    href="http://dev.w3.org/csswg/cssom/#cssstyledeclaration">CSSStyleDeclaration</a>
    returned must apply only to the fragment that flows through the <span>CSS
-   Region</span>.
+   Region</span>. The method returns null if the <a
+   href="#css-region">region</a> object is not (or no longer) a region.
 
   <div class=note>
    <p>If the element is not contained in the <span>CSS Region</span> at all,
@@ -2109,14 +2112,7 @@ <h3 id=the-region-interface><span class=secno>6.2. </span>The Region
    class=property>flow-from</code></a>’ property on the corresponding
    pseudo-element, element or other construct becomes ‘<code
    class=property>none</code>’ but a script is still holding a reference to
-   the <a href="#css-region"><code class=idl>Region</code></a> object. If a
-   <a href="#css-region"><code class=idl>Region</code></a> instance is no
-   longer a <a href="#css-region">region</a>, accessing its attributes or
-   invoking its methods throws a <a
-   href="http://www.w3.org/TR/dom/#exception-domexception"><code
-   class=idl>DOMException</code></a> with the <a
-   href="http://www.w3.org/TR/dom/#dom-domexception-invalid_access_err"><code
-   class=idl>INVALID_ACCESS_ERR</code></a> error code.
+   the <a href="#css-region"><code class=idl>Region</code></a> object.
 
   <h3 id=region-style-rule-interface><span class=secno>6.3. </span>The
    CSSRegionStyleRule interface</h3>
@@ -2817,6 +2813,8 @@ <h3 id="changes_from_May_03_2012"><span class=secno>12.1. </span>Changes
    3<sup>rd</sup> 2012</a> version</h3>
 
   <ul>
+   <li>Removed exceptions from the Region interface
+
    <li>Changed NamedFlowCollection from live to a static snapshot
 
    <li>Changed NamedFlow to inherit from EventTarget

css3-regions/Overview.src.html

@@ -1812,15 +1812,23 @@ <h3 id="the-region-interface">The Region interface</h3>
 
             <dt>'fit'</dt>
 
-            <dd>The region's flow fragment content fits into the region's <a href=
-            "http://www.w3.org/TR/CSS21/box.html#box-dimensions">content box</a>.
-            If the region is the last one in the <span title=
-            "region-chain">region chain</span>, it means that the content fits
-            without overflowing. If the region is not the last one in the region
-            chain, that means the <span>named flow</span>
-            content is further fitted in subsequent regions. In this
-            last case, note that the <span>named flow</span> fragment may be 
-            empty (for example if the region is too small to accommodate any content).</dd>
+            <dd>The region's flow fragment content 
+              fits into the region's 
+              <a href="http://www.w3.org/TR/CSS21/box.html#box-dimensions">content box</a>. 
+              If the region is the last one 
+              in the <span title="region-chain">region chain</span>, 
+              it means that the content 
+              fits without overflowing. 
+              If the region is not the last one 
+              in the region chain, 
+              that means the <span>named flow</span> content 
+              is further fitted in subsequent regions. 
+              In this last case, 
+              note that the <span>named flow</span> fragment may be empty 
+              (for example if the region is too small 
+              to accommodate any content). 
+              This value is returned if the <span>region</span> object 
+              is not (or no longer) a region.</dd>
 
             <dt>'empty'</dt>
 
@@ -1883,7 +1891,10 @@ <h3 id="the-region-interface">The Region interface</h3>
           If the element is fragmented across region boundaries, 
           the <a href="http://dev.w3.org/csswg/cssom/#cssstyledeclaration">CSSStyleDeclaration</a>  returned must apply only 
           to the fragment that flows through 
-          the <span>CSS Region</span>.</p>
+          the <span>CSS Region</span>. 
+          The method returns null 
+          if the <span>region</span> object 
+          is not (or no longer) a region.</p>
 
         <div class="note">
           <p>If the element is not contained 
@@ -1906,15 +1917,7 @@ <h3 id="the-region-interface">The Region interface</h3>
           element or other construct
           becomes 'none' 
           but a script is still holding 
-          a reference to the <code class="idl">Region</code> object. 
-          If a <code class="idl">Region</code> instance 
-          is no longer a <span>region</span>, 
-          accessing its attributes 
-          or invoking its methods throws a 
-          <a href="http://www.w3.org/TR/dom/#exception-domexception"><code class="idl">DOMException</code></a> 
-          with the 
-          <a href="http://www.w3.org/TR/dom/#dom-domexception-invalid_access_err"><code class="idl">INVALID_ACCESS_ERR</code></a> 
-          error code.</p>
+          a reference to the <code class="idl">Region</code> object.
         </div>
 
     <h3 id="region-style-rule-interface">The CSSRegionStyleRule interface</h3>
@@ -2447,6 +2450,7 @@ <h2 id="changes">Changes</h2>
     <h3 id="changes_from_May_03_2012">Changes from <a href="http://www.w3.org/TR/2012/WD-css3-regions-20120503/">May 3<sup>rd</sup> 2012</a> version</h3>
 
     <ul>
+      <li>Removed exceptions from the Region interface</li>
       <li>Changed NamedFlowCollection from live to a static snapshot</li>
       <li>Changed NamedFlow to inherit from EventTarget</li>
       <li>Removed flowFrom from Region interface and changed method name to getComputedRegionStyle().</li>