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[css-text] Clusters for letter spacing in Thai and other complex scripts <http://lists.w3.org/Archives/Public/www-style/2013Oct/0092.html>
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‎css-text/Overview.html‎

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rel=dcterms.rights>
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<meta content="CSS Text Module Level 3" name=dcterms.title>
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<meta content=text name=dcterms.type>
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<meta content=2013-11-14 name=dcterms.date>
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<meta content=2014-04-19 name=dcterms.date>
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<meta content="Elika J. Etemad" name=dcterms.creator>
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<meta content="Koji Ishii" name=dcterms.creator>
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<meta content=W3C name=dcterms.publisher>
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<meta content="http://www.w3.org/TR/2013/WD-css-text-3-20131114/"
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<meta content="http://www.w3.org/TR/2014/WD-css-text-3-20140419/"
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name=dcterms.identifier>
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<link href="#contents" rel=contents><!--<link rel=index href="#index">-->
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<h1>CSS Text Module Level 3</h1>
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<h2 class="no-num no-toc">W3C Working Draft 14 November 2013</h2>
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<h2 class="no-num no-toc">W3C Working Draft 19 April 2014</h2>
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<dl>
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<dt>This version:
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<dd><a
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href="http://www.w3.org/TR/2013/WD-css-text-3-20131114/">http://www.w3.org/TR/2013/WD-css-text-3-20131114/</a></dd>
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href="http://www.w3.org/TR/2014/WD-css-text-3-20140419/">http://www.w3.org/TR/2014/WD-css-text-3-20140419/</a></dd>
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<!--
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<dd><a href="http://dev.w3.org/csswg/css3-text/">http://dev.w3.org/csswg/css3-text/</a>
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-->
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<!--begin-copyright-->
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<p class=copyright><a
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href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"
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rel=license>Copyright</a> © 2013 <a href="http://www.w3.org/"><abbr
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rel=license>Copyright</a> © 2014 <a href="http://www.w3.org/"><abbr
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title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a
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href="http://www.csail.mit.edu/"><abbr
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title="Massachusetts Institute of Technology">MIT</abbr></a>, <a
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href="http://www.w3.org/TR/css3-writing-modes/#vertical-intro">vertical</a>
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text are addressed in <a
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href="http://www.w3.org/TR/css3-writing-modes/">CSS Writing Modes Level
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3</a> <a href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{CSS3-WRITING-MODES}}--></a>.
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3</a> <a href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{CSS-WRITING-MODES-3}}--></a>.
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</div>
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<h3 id=placement><span class=secno>1.1. </span> Module Interactions</h3>
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<p>Other terminology and concepts used in this specification are defined in
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<a href="#ref-CSS21" rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a> and <a
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href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{!CSS3-WRITING-MODES}}--></a>.
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href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{!CSS-WRITING-MODES-3}}--></a>.
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<h2 id=transforming><span class=secno>2. </span> Transforming Text</h2>
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edge of the line box. (In vertical writing modes, this will be either the
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physical top or bottom, depending on ‘<code
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class=property>text-orientation</code>’.) <a
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href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{CSS3-WRITING-MODES}}--></a>
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href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{CSS-WRITING-MODES-3}}--></a>
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<dt><dfn id=right title="right!!text-align">‘<code
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class=css>right</code>’</dfn>
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edge of the line box. (In vertical writing modes, this will be either the
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physical top or bottom, depending on ‘<code
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class=property>text-orientation</code>’.) <a
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href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{CSS3-WRITING-MODES}}--></a>
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href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{CSS-WRITING-MODES-3}}--></a>
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<dt><dfn id=center title="center!!text-align">‘<code
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class=css>center</code>’</dfn>
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cursive connections, it <em>must not</em> apply spacing between any pair
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of that script's <a href="#letter0"><i>letters</i></a> at all.
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<p>In some scripts such as Thai or Lao, the UA may apply the additional
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spacing within a <a href="#character"><i>character</i></a> sometimes along
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with decompositions. In other scripts such as Myanmar, the UA may disallow
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applying the additional spacing between a specific pair of <a
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href="#character"><i>characters</i></a> such as within a syllable.
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<h2 id=edge-effects><span class=secno>9. </span> Edge Effects</h2>
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<p>Edge effects control the indentation of lines with respect to other
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computed ‘<code class=property>direction</code>’.
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<p>However if its containing block has ‘<code class=css>unicode-bidi:
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plaintext</code>’ <a href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{!CSS3-WRITING-MODES}}--></a>,
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plaintext</code>’ <a href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{!CSS-WRITING-MODES-3}}--></a>,
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the line box's <i>inline base direction</i> must be determined by the
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<i>base direction</i> of the <i>bidi paragraph</i> to which it belongs:
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that is, the <i>bidi paragraph</i> for which the line box holds content.
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<li><a
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href="http://www.w3.org/TR/css3-writing-modes/#text-orientation">text
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orientation</a> <a href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{!CSS3-WRITING-MODES}}--></a>
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orientation</a> <a href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{!CSS-WRITING-MODES-3}}--></a>
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<li><a href="#wrapping">text wrapping</a> while applying per line:
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<ol style="list-style: lower-roman">
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href="http://www.w3.org/TR/css3-writing-modes/#text-direction">bidirectional
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reordering</a> <a href="#ref-CSS21"
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rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a> / <a
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href="#ref-CSS3-WRITING-MODES"
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rel=biblioentry>[CSS3-WRITING-MODES]<!--{{!CSS3-WRITING-MODES}}--></a>
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href="#ref-CSS-WRITING-MODES-3"
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rel=biblioentry>[CSS-WRITING-MODES-3]<!--{{!CSS-WRITING-MODES-3}}--></a>
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<li><a href="#white-space-phase-2">white space processing</a> part II
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<dd style="display: none"><!-- keeps the doc valid if the DL is empty -->
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<dt id=ref-CSS-WRITING-MODES-3>[CSS-WRITING-MODES-3]
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<dd>fantasai; Koji Ishii. <a
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href="http://www.w3.org/TR/2013/WD-css-writing-modes-3-20131126/"><cite>CSS
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Writing Modes Level 3.</cite></a> 26 November 2013. W3C Last Call Working
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Draft. (Work in progress.) URL: <a
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href="http://www.w3.org/TR/2013/WD-css-writing-modes-3-20131126/">http://www.w3.org/TR/2013/WD-css-writing-modes-3-20131126/</a>
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</dd>
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<!---->
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<dt id=ref-CSS21>[CSS21]
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<dd>Bert Bos; et al. <a
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</dd>
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<dt id=ref-CSS3-WRITING-MODES>[CSS3-WRITING-MODES]
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<dd>Elika J. Etemad; Koji Ishii. <a
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href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20121115/"><cite>CSS
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Writing Modes Module Level 3.</cite></a> 15 November 2012. W3C Working
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Draft. (Work in progress.) URL: <a
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href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20121115/">http://www.w3.org/TR/2012/WD-css3-writing-modes-20121115/</a>
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</dd>
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<!---->
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<dt id=ref-RFC2119>[RFC2119]
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<dd>S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key
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words for use in RFCs to Indicate Requirement Levels.</cite></a> Internet
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RFC 2119. URL: <a
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words for use in RFCs to Indicate Requirement Levels.</cite></a> RFC
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2119. URL: <a
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href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
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</dd>
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<dt id=ref-CSS-COUNTER-STYLES-3>[CSS-COUNTER-STYLES-3]
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<dd>Tab Atkins Jr. <a
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href="http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130221/"><cite>CSS
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Counter Styles Level 3.</cite></a> 21 February 2013. W3C Working Draft.
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(Work in progress.) URL: <a
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href="http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130221/">http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130221/</a>
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href="http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130718/"><cite>CSS
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Counter Styles Level 3.</cite></a> 18 July 2013. W3C Last Call Working
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Draft. (Work in progress.) URL: <a
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href="http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130718/">http://www.w3.org/TR/2013/WD-css-counter-styles-3-20130718/</a>
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<!---->
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<dt id=ref-HTML5>[HTML5]
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<dd>Robin Berjon; et al. <a
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href="http://www.w3.org/TR/2013/CR-html5-20130806/"><cite>HTML5.</cite></a>
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6 August 2013. W3C Candidate Recommendation. (Work in progress.) URL: <a
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href="http://www.w3.org/TR/2013/CR-html5-20130806/">http://www.w3.org/TR/2013/CR-html5-20130806/</a>
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href="http://www.w3.org/TR/2014/CR-html5-20140204/"><cite>HTML5.</cite></a>
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4 February 2014. W3C Candidate Recommendation. (Work in progress.) URL:
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<a
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href="http://www.w3.org/TR/2014/CR-html5-20140204/">http://www.w3.org/TR/2014/CR-html5-20140204/</a>
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<dt id=ref-JLREQ>[JLREQ]
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<dd>Yasuhiro Anan; et al. <a
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<dd>Yasuhiro Anan (阿南 康宏); et al. <a
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href="http://www.w3.org/TR/2012/NOTE-jlreq-20120403/"><cite>Requirements
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for Japanese Text Layout.</cite></a> 3 April 2012. W3C Working Group
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Note. URL: <a

‎css-text/Overview.src.html‎

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without breaking its cursive connections,
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it <em>must not</em> apply spacing
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between any pair of that script's <i>letters</i> at all.
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<p>In some scripts such as Thai or Lao,
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the UA may apply the additional spacing within a <i>character</i> sometimes along with decompositions.
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In other scripts such as Myanmar,
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the UA may disallow applying the additional spacing between a specific pair of <i>characters</i> such as within a syllable.
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<h2 id="edge-effects">
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Edge Effects</h2>

‎css-text/issues-lc-2013.txt‎

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Response: http://lists.w3.org/Archives/Public/www-style/2013Nov/0186.html
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Closed: Invalid
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----
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Issue 3.
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Summary: 'text-indent' should clarify how the 'width' of a line box is determined
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Response: http://lists.w3.org/Archives/Public/www-style/2013Oct/0065.html
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Response: http://lists.w3.org/Archives/Public/www-style/2013Oct/0092.html
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Open:
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Closed: Accepted
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----
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Issue 6.
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Summary: 'hanging-punctuation: first' should apply to after forced-break

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