[css-text] Make normal compute to zero, allow letter-spacing to justify.

Author: fantasai

css-text/Overview.html

@@ -2219,7 +2219,7 @@ <h3 id=text-justify><span class=secno>7.3. </span> Justification Method:
     class=css>inter-word</code>’</dfn>
 
    <dd>Justification adjusts spacing at <a href="#word-separator"><i>word
-    separators</i></a> (effectively varying the used ‘<a
+    separators</i></a> only (effectively varying the used ‘<a
     href="#word-spacing0"><code class=property>word-spacing</code></a>’ on
     the line). This behavior is typical for languages that separate words
     using spaces, like English or Korean.
@@ -2658,8 +2658,7 @@ <h3 id=letter-spacing><span class=secno>8.2. </span> Tracking: the ‘<a
     <tr>
      <th>Computed value:
 
-     <td>an absolute length or the keyword ‘<code
-      class=css>normal</code>’
+     <td>an absolute length
 
     <tr>
      <th>Animatable:
@@ -2673,19 +2672,23 @@ <h3 id=letter-spacing><span class=secno>8.2. </span> Tracking: the ‘<a
      <td>N/A
   </table>
 
-  <p>This property specifies additional spacing (tracking) between adjacent
-   <a href="#character"><i>characters</i></a>. Letter-spacing is applied
-   after <a
+  <p>This property specifies additional spacing between adjacent <a
+   href="#character"><i>characters</i></a> (commonly called <dfn
+   id=tracking>tracking</dfn>). Letter-spacing is applied after <a
    href="http://www.w3.org/TR/css3-writing-modes/#text-direction">bidi
    reordering</a> and is in addition to any ‘<a href="#word-spacing0"><code
-   class=property>word-spacing</code></a>’. Values have the following
-   meanings:
+   class=property>word-spacing</code></a>’. Depending on the justification
+   rules in effect, user agents may further increase or decrease the space
+   between <a href="#character"><i>characters</i></a> in order to <a
+   href="#text-justify">justify text</a>.
+
+  <p>Values have the following meanings:
 
   <dl>
    <dt><dfn id=normal4 title="normal!!word-spacing">‘<code
     class=css>normal</code>’</dfn>
 
-   <dd>No additional spacing is applied.
+   <dd>No additional spacing is applied. Computes to zero.
 
    <dt><dfn id=length0 title="&lt;length&gt;!!word-spacing">‘<code
     class=css>&lt;length&gt;</code>’</dfn>
@@ -2695,29 +2698,6 @@ <h3 id=letter-spacing><span class=secno>8.2. </span> Tracking: the ‘<a
     there may be implementation-dependent limits.
   </dl>
 
-  <div class=issue>
-   <p>CSS2.1 defines that ‘<a href="#letter-spacing0"><code
-    class=property>letter-spacing</code></a>’ values other than ‘<code
-    class=css>normal</code>’ forbid the adjustment of letter-spacing during
-    justification. This means that tracking can't be used in conjunction
-    with, e.g. CJK justification methods. However, allowing it would mean we
-    need a control for disabling it; German, for example, avoids
-    letter-spacing for justification because it's used for emphasis. See <a
-    href="http://lists.w3.org/Archives/Public/www-style/2013May/0280.html">this
-    thread</a>.
-
-   <p>Proposed text:
-
-   <blockquote>
-    <p>[Unless the ‘<code class=css>fixed</code>’ keyword is specified,]
-     Depending on the justification rules in effect, user agents may further
-     increase or decrease the space between <a
-     href="#character"><i>characters</i></a> in order to justify text. See
-     ‘<a href="#text-justify0"><code
-     class=property>text-justify</code></a>’ for details.
-   </blockquote>
-  </div>
-
   <p>For the purpose of ‘<a href="#letter-spacing0"><code
    class=property>letter-spacing</code></a>’, each consecutive run of
    atomic inlines (such as images and inline blocks) is treated as a single
@@ -4275,6 +4255,9 @@ <h2 class=no-num id=index> Index</h2>
    <li>text-transform, <a href="#text-transform0"
     title="section 2.1."><strong>2.1.</strong></a>
 
+   <li>tracking, <a href="#tracking"
+    title="section 8.2."><strong>8.2.</strong></a>
+
    <li>uppercase
     <ul>
      <li>text-transform, <a href="#uppercase"

css-text/Overview.src.html

@@ -1604,7 +1604,7 @@ <h3 id="text-justify">
           to improve readability or for accessibility purposes.
 
       <dt><dfn title="inter-word!!text-justify">''inter-word''</dfn></dt>
-        <dd>Justification adjusts spacing at <i>word separators</i>
+        <dd>Justification adjusts spacing at <i>word separators</i> only
           (effectively varying the used 'word-spacing' on the line).
           This behavior is typical for languages that separate words using spaces,
           like English or Korean.
@@ -1958,7 +1958,7 @@ <h3 id="letter-spacing">
         </tr>
         <tr>
           <th>Computed&#160;value:</th>
-          <td>an absolute length or the keyword ''normal''
+          <td>an absolute length
         </tr>
         <tr>
           <th>Animatable:
@@ -1968,39 +1968,25 @@ <h3 id="letter-spacing">
           <td>N/A
     </table>
 
-    <p>This property specifies additional spacing (tracking)
-      between adjacent <i>characters</i>.
-      Letter-spacing is applied after
-      <a href="http://www.w3.org/TR/css3-writing-modes/#text-direction">bidi reordering</a>
-      and is in addition to any 'word-spacing'.
-      Values have the following meanings:
+  <p>This property specifies additional spacing between adjacent <i>characters</i>
+  (commonly called <dfn>tracking</dfn>).
+  Letter-spacing is applied after
+  <a href="http://www.w3.org/TR/css3-writing-modes/#text-direction">bidi reordering</a>
+  and is in addition to any 'word-spacing'.
+  Depending on the justification rules in effect,
+  user agents may further increase or decrease the space between <i>characters</i>
+  in order to <a href="#text-justify">justify text</a>.
+    
+  <p>Values have the following meanings:
 
   <dl>
     <dt><dfn title="normal!!word-spacing">''normal''</dfn>
-      <dd>No additional spacing is applied.
+      <dd>No additional spacing is applied. Computes to zero.
     <dt><dfn title="&lt;length&gt;!!word-spacing">''&lt;length&gt;''</dfn>
       <dd>Specifies <em>additional</em> spacing between <i>characters</i>.
         Values may be negative, but there may be implementation-dependent limits.
   </dl>
 
-  <div class="issue">
-    <p>CSS2.1 defines that 'letter-spacing' values other than ''normal''
-     forbid the adjustment of letter-spacing during justification.
-     This means that tracking can't be used in conjunction with, e.g. CJK justification methods.
-     However, allowing it would mean we need a control for disabling it;
-     German, for example, avoids letter-spacing for justification because it's used for emphasis.
-     See <a href="http://lists.w3.org/Archives/Public/www-style/2013May/0280.html">this thread</a>.
-
-    <p>Proposed text:
-    <blockquote>
-      <p>[Unless the ''fixed'' keyword is specified,]
-      Depending on the justification rules in effect,
-      user agents may further increase or decrease the space between <i>characters</i>
-      in order to justify text.
-      See 'text-justify' for details.
-    </blockquote>
-  </div>
-
     <p>For the purpose of 'letter-spacing', each consecutive run of atomic
       inlines (such as images and inline blocks) is treated as a single
       <i>character</i>.