Clarify line-breaking opportunities caused by collapsed spaces. <http://lists.w3.org/Archives/Public/www-style/2012Jan/0936.html>

Author: fantasai

css3-text/Overview.html

@@ -32,15 +32,15 @@
 
    <h1>CSS Text Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 23 January
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 24 January
     2012</h2>
 
    <dl>
     <dt>This version:
 
-    <dd><a href="http://dev.w3.org/csswg/css3-text/">$Date: 2012/01/19
-     02:52:02 $ (CVS $Revision$)</a> <!--
-    <dd><a href="http://www.w3.org/TR/2012/WD-css3-text-20120123/">http://www.w3.org/TR/2012/WD-css3-text-20120123/</a></dd>
+    <dd><a href="http://dev.w3.org/csswg/css3-text/">$Date: 2012/01/23
+     20:29:45 $ (CVS $Revision$)</a> <!--
+    <dd><a href="http://www.w3.org/TR/2012/WD-css3-text-20120124/">http://www.w3.org/TR/2012/WD-css3-text-20120124/</a></dd>
   -->
 
 
@@ -863,9 +863,8 @@ <h3 id=white-space-rules><span class=secno>3.3. </span> The White Space
      <li>Any space immediately following another collapsible space
       &mdash;even one outside the boundary of the inline containing the
       space, provided they are within the same inline formatting
-      context&mdash;is removed. However, if removing this space would
-      eliminate a line breaking opportunity in the text, that opportunity is
-      still considered to exist.
+      context&mdash;is collapsed to have zero advance width. (It is
+      invisible, but retains its line-breaking opportunity, if any.)
     </ol>
 
    <li>
@@ -904,8 +903,8 @@ <h3 id=white-space-rules><span class=secno>3.3. </span> The White Space
     character advance widths.
   </ol>
 
-  <p>White space that was not removed during the white space processing steps
-   is called <dfn id=preserved>preserved</dfn> white space.
+  <p>White space that was not removed or collapsed during the white space
+   processing steps is called <dfn id=preserved>preserved</dfn> white space.
 
   <div class=example>
    <h4 id=egbidiwscollapse><span class=secno>3.3.1. </span> Example of
@@ -1182,8 +1181,8 @@ <h2 id=line-breaking><span class=secno>4. </span> Line Breaking and Word
    element containing the boundary control breaking.
    <!-- http://lists.w3.org/Archives/Public/www-style/2008Dec/0043.html -->
    For break opportunities given by the first or last character of a box, the
-   break occurs immediately before/after the box rather than breaking the
-   box.
+   break occurs immediately before/after the box (at its margin edge) rather
+   than breaking the box at its content edge.
 
   <div class=note>
    <p>Further information on line breaking conventions can be found in <a

css3-text/Overview.src.html

@@ -523,10 +523,8 @@ <h3 id="white-space-rules">
         <li>Any space immediately following another collapsible space
           &mdash;even one outside the boundary of the inline containing
           the space, provided they are within the same inline formatting
-          context&mdash;is removed.
-          However, if removing this space would eliminate a line breaking
-          opportunity in the text, that opportunity is still considered
-          to exist.</li>
+          context&mdash;is collapsed to have zero advance width. (It is
+          invisible, but retains its line-breaking opportunity, if any.)</li>
       </ol>
     </li>
     <li><p>If 'text-space-collapse' is set to ''preserve'', any sequence of
@@ -554,8 +552,8 @@ <h3 id="white-space-rules">
          collapse their character advance widths.
     </ol>
 
-    <p>White space that was not removed during the white space processing
-      steps is called <dfn>preserved</dfn> white space.</p>
+    <p>White space that was not removed or collapsed during the white space
+      processing steps is called <dfn>preserved</dfn> white space.</p>
 
     <div class="example">
     <h4 id="egbidiwscollapse">
@@ -763,9 +761,8 @@ <h2 id="line-breaking">
     the properties on the element containing the boundary control breaking.
     <!-- http://lists.w3.org/Archives/Public/www-style/2008Dec/0043.html -->
     For break opportunities given by the first or last character of a
-    box, the break occurs immediately before/after the box rather than
-    breaking the box.
-
+    box, the break occurs immediately before/after the box (at its margin
+    edge) rather than breaking the box at its content edge.
 
   <div class="note">
     <p>Further information on line breaking conventions can be found in