Mercurial > drafts / changeset

     1.1 --- a/css-text/Overview.html	Tue Jul 16 15:35:51 2013 -0700
     1.2 +++ b/css-text/Overview.html	Tue Jul 16 16:24:23 2013 -0700
     1.3 @@ -315,7 +315,7 @@
     1.4         <li><a href="#justify-cursive"><span class=secno>7.3.4. </span>
     1.5          Cursive Scripts</a>
     1.6  
     1.7 -       <li><a href="#justify-alt"><span class=secno>7.3.5. </span> Possible
     1.8 +       <li><a href="#justify-algos"><span class=secno>7.3.5. </span> Possible
     1.9          Algorithms</a>
    1.10        </ul>
    1.11      </ul>
    1.12 @@ -2207,13 +2207,36 @@
    1.13    <p>An <dfn id=expansion-opportunity>expansion opportunity</dfn> is a point
    1.14     where the justification algorithm may alter spacing within the text. An
    1.15     expansion opportunity can be provided by a single <a
    1.16 -   href="#character"><i>character</i></a> (such as a <i>word separator
    1.17 -   character</i>), or by the juxtaposition of two <a
    1.18 -   href="#character"><i>characters</i></a>. The UA divides <a
    1.19 +   href="#character"><i>character</i></a> (such as a <a
    1.20 +   href="#word-separator"><i>word separator</i></a>), or by the juxtaposition
    1.21 +   of two <a href="#character"><i>characters</i></a>. Space distributed by
    1.22 +   justification is <em>in addition to</em> the optimal spacing defined by
    1.23 +   the ‘<a href="#letter-spacing0"><code
    1.24 +   class=property>letter-spacing</code></a>’ or ‘<a
    1.25 +   href="#word-spacing0"><code class=property>word-spacing</code></a>’
    1.26 +   properties. However, when space is distributed to a <a
    1.27 +   href="#word-separator"><i>word separator</i></a> <a
    1.28 +   href="#expansion-opportunity"><i>expansion opportunity</i></a>, it is
    1.29 +   applied under the same rules as for ‘<a href="#word-spacing0"><code
    1.30 +   class=property>word-spacing</code></a>’. Similarly, when space is
    1.31 +   distributed an <a href="#expansion-opportunity"><i>expansion
    1.32 +   opportunity</i></a> between two <a
    1.33 +   href="#character"><i>characters</i></a>, it is applied under the same
    1.34 +   rules as for ‘<a href="#letter-spacing0"><code
    1.35 +   class=property>letter-spacing</code></a>’.
    1.36 +
    1.37 +  <p>A justification algorithm may divide <a
    1.38     href="#expansion-opportunity"><i>expansion opportunities</i></a> into
    1.39 -   different priority levels: within a level, all <a
    1.40 -   href="#expansion-opportunity"><i>expansion opportunities</i></a> are
    1.41 -   expanded or compressed at the same priority.
    1.42 +   different priority levels. All <a
    1.43 +   href="#expansion-opportunity"><i>expansion opportunities</i></a> within a
    1.44 +   given level are expanded or compressed at the same priority, regardless of
    1.45 +   which <a href="#character"><i>characters</i></a> created that opportunity.
    1.46 +   For example, if <a href="#expansion-opportunity"><i>expansion
    1.47 +   opportunities</i></a> between two Han characters and between two Latin <a
    1.48 +   href="#letter0"><i>letters</i></a> are defined to be at the same level (as
    1.49 +   they are in the ‘<code class=css>distribute</code>’ justification
    1.50 +   style), they are not treated differently because they originate from
    1.51 +   different <a href="#character"><i>characters</i></a>.
    1.52  
    1.53    <h4 id=justify-symbols><span class=secno>7.3.2. </span> Handling Symbols
    1.54     and Punctuation</h4>
    1.55 @@ -2255,7 +2278,7 @@
    1.56     introduced by <a href="#word-separator"><i>word separators</i></a>. How
    1.57     any remaining space is distributed once all <a
    1.58     href="#expansion-opportunity"><i>expansion opportunities</i></a> reach
    1.59 -   their limits is up to the UA.
    1.60 +   their specified limits is up to the UA.
    1.61  
    1.62    <p>If the inline contents of a line cannot be stretched to the full width
    1.63     of the line box, then they must be aligned as specified by the ‘<a
    1.64 @@ -2282,7 +2305,7 @@
    1.65     between any pair of <i>cursive script</i> <a
    1.66     href="#letter0"><i>letters</i></a>.
    1.67  
    1.68 -  <h4 id=justify-alt><span class=secno>7.3.5. </span> Possible Algorithms</h4>
    1.69 +  <h4 id=justify-algos><span class=secno>7.3.5. </span> Possible Algorithms</h4>
    1.70  
    1.71    <p>The guidelines in this level of CSS do not describe a complete
    1.72     justification algorithm. They are merely a minimum set of requirements
    1.73 @@ -2433,10 +2456,11 @@
    1.74      character's <i>advance measure</i>.
    1.75    </dl>
    1.76  
    1.77 -  <p>Additional spacing is applied to each <i>word separator character</i>
    1.78 -   left in the text after the <a href="#white-space-rules">white space
    1.79 -   processing rules</a> have been applied, and should be applied half on each
    1.80 -   side of the character unless otherwise dictated by typographic tradition.
    1.81 +  <p>Additional spacing is applied to each <a href="#word-separator"><i>word
    1.82 +   separator</i></a> left in the text after the <a
    1.83 +   href="#white-space-rules">white space processing rules</a> have been
    1.84 +   applied, and should be applied half on each side of the character unless
    1.85 +   otherwise dictated by typographic tradition.
    1.86  
    1.87    <div class=example>
    1.88     <p>The following example will make all the spaces between words in Arabic

     2.1 --- a/css-text/Overview.src.html	Tue Jul 16 15:35:51 2013 -0700
     2.2 +++ b/css-text/Overview.src.html	Tue Jul 16 16:24:23 2013 -0700
     2.3 @@ -1613,21 +1613,33 @@
     2.4  <h4 id="expanding-text">
     2.5  Expanding and Compressing Text</h4>
     2.6  
     2.7 -    <p>When justifying text, the user agent takes the remaining space between
     2.8 -      the ends of a line's contents and the edges of its line box, and
     2.9 -      distributes that space throughout its contents so that the contents
    2.10 -      exactly fill the line box.
    2.11 -      The user agent may alternatively distribute negative space,
    2.12 -      putting more content on the line than would otherwise fit under normal spacing conditions.
    2.13 +  <p>When justifying text, the user agent takes the remaining space between
    2.14 +    the ends of a line's contents and the edges of its line box, and
    2.15 +    distributes that space throughout its contents so that the contents
    2.16 +    exactly fill the line box.
    2.17 +    The user agent may alternatively distribute negative space,
    2.18 +    putting more content on the line than would otherwise fit under normal spacing conditions.
    2.19  
    2.20 -    <p>An <dfn>expansion opportunity</dfn> is
    2.21 -      a point where the justification algorithm may alter spacing within the text.
    2.22 -      An expansion opportunity can be provided by a single <i>character</i>
    2.23 -      (such as a <i>word separator character</i>),
    2.24 -      or by the juxtaposition of two <i>characters</i>.
    2.25 -      The UA divides <i>expansion opportunities</i> into different priority levels:
    2.26 -      within a level, all <i>expansion opportunities</i> are
    2.27 -      expanded or compressed at the same priority.
    2.28 +  <p>An <dfn>expansion opportunity</dfn> is
    2.29 +    a point where the justification algorithm may alter spacing within the text.
    2.30 +    An expansion opportunity can be provided by a single <i>character</i>
    2.31 +    (such as a <i>word separator</i>),
    2.32 +    or by the juxtaposition of two <i>characters</i>.
    2.33 +    Space distributed by justification is <em>in addition to</em>
    2.34 +    the optimal spacing defined by the 'letter-spacing' or 'word-spacing' properties.
    2.35 +    However, when space is distributed to a <i>word separator</i> <i>expansion opportunity</i>,
    2.36 +    it is applied under the same rules as for 'word-spacing'.
    2.37 +    Similarly, when space is distributed an <i>expansion opportunity</i> between two <i>characters</i>,
    2.38 +    it is applied under the same rules as for 'letter-spacing'.
    2.39 +
    2.40 +  <p>A justification algorithm may divide <i>expansion opportunities</i> into different priority levels.
    2.41 +    All <i>expansion opportunities</i> within a given level
    2.42 +    are expanded or compressed at the same priority,
    2.43 +    regardless of which <i>characters</i> created that opportunity.
    2.44 +    For example, if <i>expansion opportunities</i> between two Han characters
    2.45 +    and between two Latin <i>letters</i> are defined to be at the same level
    2.46 +    (as they are in the ''distribute'' justification style),
    2.47 +    they are not treated differently because they originate from different <i>characters</i>.
    2.48  
    2.49  <h4 id="justify-symbols">
    2.50  Handling Symbols and Punctuation</h4>
    2.51 @@ -1661,7 +1673,7 @@
    2.52      <p>The 'word-spacing' property can specify limits on
    2.53        <i>expansion opportunities</i> introduced by <i>word separators</i>.
    2.54        How any remaining space is distributed once all <i>expansion opportunities</i>
    2.55 -      reach their limits is up to the UA.
    2.56 +      reach their specified limits is up to the UA.
    2.57      
    2.58      <p>If the inline contents of a line cannot be stretched to the full width of the line box,
    2.59        then they must be aligned as specified by the 'text-align-last' property.
    2.60 @@ -1680,7 +1692,7 @@
    2.61        It otherwise <em>must</em> assume that no <i>expansion opportunity</i> exists
    2.62        between any pair of <i>cursive script</i> <i>letters</i>.
    2.63  
    2.64 -<h4 id="justify-alt">
    2.65 +<h4 id="justify-algos">
    2.66  Possible Algorithms</h4>
    2.67  
    2.68    <p>The guidelines in this level of CSS do not describe a complete
    2.69 @@ -1798,7 +1810,7 @@
    2.70          character's <i>advance measure</i>.
    2.71    </dl>
    2.72  
    2.73 -  <p>Additional spacing is applied to each <i>word separator character</i>
    2.74 +  <p>Additional spacing is applied to each <i>word separator</i>
    2.75      left in the text after the <a href="#white-space-rules">white space processing rules</a> have been applied,
    2.76      and should be applied half on each side of the character
    2.77      unless otherwise dictated by typographic tradition.