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revision 1.8 by wakaba, Mon Oct 15 00:32:05 2007 UTC revision 1.12 by wakaba, Mon Oct 22 10:38:19 2007 UTC
# Line 10  Line 10 
10  <div class="header">  <div class="header">
11  <h1>Selectors Serialization Format for Testing (<abbr>SSFT</abbr>)  <h1>Selectors Serialization Format for Testing (<abbr>SSFT</abbr>)
12  Specification</h1>  Specification</h1>
13  <h2>Working Draft <time datetime=2007-10-15>15 October 2007</time></h2>  <h2>Working Draft <time datetime=2007-10-22>22 October 2007</time></h2>
14    
15  <dl class="versions-uri">  <dl class="versions-uri">
16  <dt>This Version</dt>  <dt>This Version</dt>
# Line 63  available at <code class="URI">&lt;<a Line 63  available at <code class="URI">&lt;<a
63  at the time of its publication.  Other documents  at the time of its publication.  Other documents
64  might supersede this document.</em></p>  might supersede this document.</em></p>
65    
66  <p>This document is a working draft, produced as part  <p>This document is a working draft, produced as part of the
67    <a href="http://suika.fam.cx/www/markup/html/whatpm/readme">Whatpm</a>
68    subproject
69  of the <a href="http://suika.fam.cx/www/manakai-core/doc/web/">manakai</a>  of the <a href="http://suika.fam.cx/www/manakai-core/doc/web/">manakai</a>
70  project.  It might be updated, replaced, or obsoleted by  project.  It might be updated, replaced, or obsoleted by
71  other documents at any time.  It is inappropriate to  other documents at any time.  It is inappropriate to
# Line 116  in not escaping unsafe identifiers.</p> Line 118  in not escaping unsafe identifiers.</p>
118  <div class="section" id="terminology">  <div class="section" id="terminology">
119  <h2>Terminology</h2>  <h2>Terminology</h2>
120    
121  <p>The key words <q><em class="rfc2119">MUST</em></q>,  <p>The key words <q><dfn id=must><em class="rfc2119">MUST</em></dfn></q>,
122  <q><em class="rfc2119">MUST NOT</em></q>,  <q><dfn id=must-not><em class="rfc2119">MUST NOT</em></dfn></q>,
123  <q><em class="rfc2119">SHOULD</em></q>,  <q><dfn id=should><em class="rfc2119">SHOULD</em></dfn></q>,
124  <q><em class="rfc2119">SHOULD NOT</em></q>, and  <q><dfn id=should-not><em class="rfc2119">SHOULD NOT</em></dfn></q>, and
125  <q><em class=rfc2119>MAY</em></q> in this  <q><dfn id=may><em class=rfc2119>MAY</em></dfn></q> in this
126  document are to be interpreted as described in  document are to be interpreted as described in
127  <a href="urn:ietf:rfc:2119"><abbr title="Request for Comments">RFC</abbr>  <a href="urn:ietf:rfc:2119"><abbr title="Request for Comments">RFC</abbr>
128  2119</a>  2119</a>
# Line 138  simple selector in a selector.</p> Line 140  simple selector in a selector.</p>
140  </div>  </div>
141    
142  <div class="section" id="serializing">  <div class="section" id="serializing">
143  <h2>Serializing Groups of Selectors</h2>  <h2>Serializing in
144    <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
145    Representation</h2>
146    
147  <div class="issue ed">  <div class="issue ed">
148  <p><a href="http://suika.fam.cx/gate/cvs/*checkout*/markup/html/whatpm/Whatpm/CSS/SelectorsSerializer.pm">See the reference implementation</a>  <p><a href="http://suika.fam.cx/gate/cvs/*checkout*/markup/html/whatpm/Whatpm/CSS/SelectorsSerializer.pm">See the reference implementation</a>
149  for now.</p>  for now.</p>
150  </div>  </div>
151    
152    <div class=section id=serializing-groups-of-selectors>
153    <h3>Serializing Groups of Selectors</h3>
154    
155  <p>No <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>  <p>No <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
156  representation is defined for an invalid group of selectors.</p>  representation is defined for an invalid group of selectors.</p>
157    
# Line 173  a group of selectors (<dfn id=var-gs><va Line 180  a group of selectors (<dfn id=var-gs><va
180      <dl class=switch>      <dl class=switch>
181      <dt>If it is a sequence of simle selector      <dt>If it is a sequence of simle selector
182      (<dfn id=var-sss><var>sss</var></dfn>)</dt>      (<dfn id=var-sss><var>sss</var></dfn>)</dt>
183        <dd class=ed>@@</dd>        <dd>
184            <ol>
185            <li class=ed><a href="#algorithm-serialize-a-simple-selector">Serialize
186            each simple selector</a> in <var>sss</var>.</li>
187            <li class=ed>sort</li>
188            <li>Append a <a href="#newline">newline</a> to <var>result</var>.</li>
189            </ol>
190          </dd>
191      <dt>If it is a combinator (<dfn id=var-c><var>c</var></dfn>)</dt>      <dt>If it is a combinator (<dfn id=var-c><var>c</var></dfn>)</dt>
192        <dd>        <dd>
193          <ol>          <ol>
# Line 215  a group of selectors (<dfn id=var-gs><va Line 229  a group of selectors (<dfn id=var-gs><va
229  representation of <var>gs</var>.</li>  representation of <var>gs</var>.</li>
230  </ol>  </ol>
231    
232    </div>
233    
234    <div class=section id=serializing-simple-selectors>
235    <h3>Serializing Simple Selectors</h3>
236    
237  <p>To  <p>To
238  <dfn id=algorithm-serialize-a-simple-selector title="serialize a simple selector">serialize  <dfn id=algorithm-serialize-a-simple-selector title="serialize a simple selector">serialize
239  a simple selector (<dfn><var id=var-ss>ss</var></dfn>)</dfn>:</p>  a simple selector (<dfn><var id=var-ss>ss</var></dfn>)</dfn>:</p>
# Line 243  a simple selector (<dfn><var id=var-ss>s Line 262  a simple selector (<dfn><var id=var-ss>s
262        </dl>        </dl>
263      </li>      </li>
264      <li>If <var>ss</var> is a type selector, append the      <li>If <var>ss</var> is a type selector, append the
265      <span class=ed>@@ normalized</span> local name to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
266        local name to <var>result</var>.</li>
267      <li>If <var>ss</var> is a universal selector, append      <li>If <var>ss</var> is a universal selector, append
268      a <code class=char>U+002A</code> <code class=charname>ASTERISK</code>      a <code class=char>U+002A</code> <code class=charname>ASTERISK</code>
269      (<code class=char>*</code>) character to <var>result</var>.</li>      (<code class=char>*</code>) character to <var>result</var>.</li>
270      </ol>      </ol>
271    </dd>    </dd>
272  <dt>If <var>ss</var> is an attribute selector</dt>  <dt>If <var>ss</var> is an attribute selector</dt>
273    <dd class=ed>@@</dd>    <dd>
274        <ol>
275        <li>Append a <code class=char>U+005B</code> <code class=charname>LEFT
276        SQUARE BRACKET</code> (<code class=char>[</code>) to
277        <var>result</var>.</li>
278        <li>
279          Append a namespace prefix as following:
280          <dl>
281          <dt>If a namespace URI is specified</dt>
282            <dd class=ed>@@</dd>
283            <dd class=ed>@@ Current reference implementation is wrong,
284            since its result of sorting depends on namespace prefix.</dd>
285          <dt>If the null namespace is specified</dt>
286            <dd>Append a <code class=char>U+007C</code>
287            <code class=charname>VERTICAL BAR</code> character to
288            <var>result</var>.</dd>
289          <dt>If no namespace is specified</dt>
290            <dd>Append a <code class=char>U+002A</code>
291            <code class=charname>ASTERISK</code> (<code class=char>*</code>)
292            character, followed by a <code class=char>U+007C</code>
293            <code class=charname>VERTICAL BAR</code> (<code class=char>|</code>)
294            character, to <var>result</var>.</dd>
295          </dl>
296        </li>
297        <li>Append the
298        <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
299        local name to <var>result</var>.</li>
300        <li>If a value is specified in <var>ss</var>:
301          <ol>
302          <li>Depending on the way to match, append <code>=</code>,
303          <code>~=</code>, <code>|=</code>, <code>^=</code>,
304          <code>$=</code>, or <code>*=</code> to <var>result</var>.</li>
305          <li>Append the
306          <a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a>
307          value to <var>result</var>.</li>
308          </ol>
309        </li>
310        <li>Append a <code class=char>U+005D</code> <code class=charname>RIGHT
311        SQUARE BRACKET</code> (<code class=char>]</code>) to
312        <var>result</var>.</li>
313        </ol>
314      </dd>
315  <dt>If <var>ss</var> is a class selector</dt>  <dt>If <var>ss</var> is a class selector</dt>
316    <dd>Append a <code class=char>U+002E</code> <code class=charname>FULL    <dd>Append a <code class=char>U+002E</code> <code class=charname>FULL
317    STOP</code> (<code class=char>.</code>) character, followed    STOP</code> (<code class=char>.</code>) character, followed
318    by <span class=ed>@@ normalized</span> class name,    by <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
319    <var>result</var>.</dd>    class name, <var>result</var>.</dd>
320  <dt>If <var>ss</var> is an <abbr>ID</abbr> selector</dt>  <dt>If <var>ss</var> is an <abbr>ID</abbr> selector</dt>
321    <dd>Append a <code class=char>U+0023</code> <code class=charname>NUMBER    <dd>Append a <code class=char>U+0023</code> <code class=charname>NUMBER
322    SIGN</code> (<code class=char>#</code>) character, followed    SIGN</code> (<code class=char>#</code>) character, followed
323    by <span class=ed>@@ normalized</span> <abbr>ID</abbr>,    by <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
324    to <var>result</var>.</dd>    <abbr>ID</abbr>, to <var>result</var>.</dd>
325  <dt>If <var>ss</var> is a pseudo$B!>(Bclass selector</dt>  <dt>If <var>ss</var> is a pseudo$B!>(Bclass selector</dt>
326    <dd>    <dd>
327      <ol>      <ol>
328      <li>Append a <code class=char>U+003A</code>      <li>Append a <code class=char>U+003A</code>
329      <code class=charname>COLON</code> (<code class=char>:</code>) character      <code class=charname>COLON</code> (<code class=char>:</code>) character
330      to <var>result</var>.</li>      to <var>result</var>.</li>
331      <li>Append the <span class=ed>@@ normalized</span> name of the      <li>Append the
332      pseudo$B!>(Bclass to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
333        name of the pseudo$B!>(Bclass to <var>result</var>.</li>
334      <li>Append any arguments as following:      <li>Append any arguments as following:
335        <dl class=switch>        <dl class=switch>
336        <dt>If the name of the pseudo$B!>(Bclass is <code>lang</code></dt>        <dt>If the name of the pseudo$B!>(Bclass is <code>lang</code></dt>
# Line 277  a simple selector (<dfn><var id=var-ss>s Line 339  a simple selector (<dfn><var id=var-ss>s
339            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT
340            PARENTHESIS</code> (<code class=char>(</code>) character            PARENTHESIS</code> (<code class=char>(</code>) character
341            to <var>result</var>.</li>            to <var>result</var>.</li>
342            <li>Append <span class=ed>@@ normalized</span>            <li>Append the
343              <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
344            language tag (the argument) to <var>result</var>.</li>            language tag (the argument) to <var>result</var>.</li>
345            <li>Append a <code class=char>U+0029</code>            <li>Append a <code class=char>U+0029</code>
346            <code class=charname>RIGHT PARENTHESIS</code>            <code class=charname>RIGHT PARENTHESIS</code>
# Line 292  a simple selector (<dfn><var id=var-ss>s Line 355  a simple selector (<dfn><var id=var-ss>s
355            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT            <li>Append a <code class=char>U+0028</code> <code class=charname>LEFT
356            PARENTHESIS</code> (<code class=char>(</code>) character            PARENTHESIS</code> (<code class=char>(</code>) character
357            to <var>result</var>.</li>            to <var>result</var>.</li>
358            <li>Append <span class=ed>@@ normalized</span>            <li>Append the
359              <a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a>
360            string (the argument) to <var>result</var>.</li>            string (the argument) to <var>result</var>.</li>
361            <li>Append a <code class=char>U+0029</code>            <li>Append a <code class=char>U+0029</code>
362            <code class=charname>RIGHT PARENTHESIS</code>            <code class=charname>RIGHT PARENTHESIS</code>
# Line 384  a simple selector (<dfn><var id=var-ss>s Line 448  a simple selector (<dfn><var id=var-ss>s
448      <li>Append two <code class=char>U+003A</code>      <li>Append two <code class=char>U+003A</code>
449      <code class=charname>COLON</code> characters (<code>::</code>)      <code class=charname>COLON</code> characters (<code>::</code>)
450      to <var>result</var>.</li>      to <var>result</var>.</li>
451      <li>Append the <span class=ed>@@ normalized</span> name of the      <li>Append the
452      pseudo$B!>(Belement to <var>result</var>.</li>      <a href="#algorithm-normalize-an-ident" title="normalize an IDENT">normalized</a>
453        name of the pseudo$B!>(Belement to <var>result</var>.</li>
454      <!-- For future version: append "(", arguments, ")", if any. -->      <!-- For future version: append "(", arguments, ")", if any. -->
455      </ol>      </ol>
456    </dd>    </dd>
457  </dl>  </dl>
458    
459    </div>
460    
461    <div class=section id=serializing-tokens>
462    <h3>Serializing Tokens</h3>
463    
464    <p>To <dfn id=algorithm-normalize-an-ident title="normalize an IDENT">normalize
465    an <code>IDENT</code> (<dfn id=var-n><var>n</var></dfn>)</dfn>:</p>
466    <ol>
467    <li>Replace the escape sequences (<code>\</code> and following
468    characters) in <var>n</var> by characters represented by them
469    respectively.</li>
470    <li>If there is any character that is <em>not</em> one of
471    <code class=char>U+002D</code> <code class=charname>HYPHEN-MINUS</code>
472    (<code class=char>-</code>), <code class=char>U+0030</code>
473    <code class=charname>DIGIT ZERO</code>
474    (<code class=char>0</code>) to <code class=char>U+0039</code>
475    <code class=charname>DIGIT NINE</code> (<code class=char>9</code>),
476    <code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER
477    A</code> (<code class=char>A</code>) to <code class=char>U+005A</code>
478    <code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>),
479    <code class=char>U+005F</code> <code class=charname>LOW LINE</code>
480    (<code class=char>_</code>), <code class=char>U+0061</code>
481    <code class=charname>LATIN SMALL LETTER A</code>
482    (<code class=char>a</code>) to <code class=char>U+006A</code>
483    <code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>),
484    <code class=char>U+0080</code> to <code class=char>U+D7FF</code>, or
485    <code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in
486    <var>n</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where
487    <dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded
488    hexadecimal representation of the character.  If the character
489    is outside the range of <code>[<code class=char>U+0000</code>,
490    <code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var>
491    <em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</li>
492    <li>If the first character in <var>n</var> is one of
493    <code class=char>U+0030</code> <code class=charname>DIGIT ZERO</code>
494    (<code class=char>0</code>) to <code class=char>U+0039</code>
495    <code class=charname>DIGIT NINE</code> (<code class=char>9</code>),
496    then prepend a string <code>\00003</code> at the beginning of
497    <var>n</var>.</li>
498    <li>If the first character in <var>n</var> is <code class=char>U+002D</code>
499    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) and
500    the second character, if any, is <em>not</em> one of
501    <code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER
502    A</code> (<code class=char>A</code>) to <code class=char>U+005A</code>
503    <code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>),
504    <code class=char>U+005F</code> <code class=charname>LOW LINE</code>
505    (<code class=char>_</code>), <code class=char>U+0061</code>
506    <code class=charname>LATIN SMALL LETTER A</code>
507    (<code class=char>a</code>) to <code class=char>U+006A</code>
508    <code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>),
509    <code>U+0080</code> to <code>U+D7FF</code>, or
510    <code>U+E000</code> to <code>U+10FFFF</code>, or
511    <var>n</var> is equal to <code class=char>U+002D</code>
512    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>), then
513    replace the <code class=char>U+002D</code>
514    <code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>)
515    character by string <code>\00002D</code>.</li>
516    <li>Then, <var>n</var> is the result of the algorithm.</li>
517    </ol>
518    
519    <p>To <dfn id=algorithm-normalize-a-string title="normalize a STRING">normalize
520    a <code>STRING</code> (<dfn id=var-s><var>s</var></dfn>)</dfn>:</p>
521    <ol>
522    <li>Replace the escape sequences (<code>\</code> and following
523    characters) in <var>s</var> by characters represented by them
524    (or an empty string if <code>\</code> is immediately followed by
525    newline character(s)) respectively.</li>
526    <li>Remove the quotation characters in <var>s</var>
527    if <var>s</var> is a <code>STRING</code>.</li>
528    <li>If there is any character that is <em>not</em> one of
529    <code class=char>U+0020</code> <code class=charname>SPACE</code>,
530    <code class=char>U+0021</code> <code class=charname>EXCLAMATION MARK</code>
531    (<code class=char>!</code>), <code class=char>U+0023</code>
532    <code class=charname>NUMBER SIGN</code> (<code class=char>#</code>) to
533    <code class=char>U+005B</code> <code class=charname>LEFT SQUARE
534    BRACKET</code>, <code class=char>U+005D</code> <code class=charname>RIGHT
535    SQUARE BRACKET</code> to <code class=char>U+D7FF</code>, or
536    <code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in
537    <var>s</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where
538    <dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded
539    hexadecimal representation of the character.  If the character
540    is outside the range of <code>[<code class=char>U+0000</code>,
541    <code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var>
542    <em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</li>
543    <li>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION
544    MARK</code> (<code class=char>"</code>) at the beginning of <var>s</var>.</li>
545    <li>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION
546    MARK</code> (<code class=char>"</code>) at the end of <var>s</var>.</li>
547    <li>Then, <var>s</var> is the result of the algorithm.</li>
548    </ol>
549    
550  <p>A <dfn id=newline title=newline>newline</dfn>  <p>A <dfn id=newline title=newline>newline</dfn>
551  <em class=rfc2119>SHOULD</em> be represented as a  <em class=rfc2119>SHOULD</em> be represented as a
# Line 400  the <abbr title="Selectors Serialization Line 555  the <abbr title="Selectors Serialization
555  representation is in use, a sequence of  representation is in use, a sequence of
556  <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>  <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>
557  followed by a <code class=char>U+000A</code>  followed by a <code class=char>U+000A</code>
558  <code class=charname>LINE FEED</code> or a character  <code class=charname>LINE FEED</code> (i.e. a
559    <code>CRLF</code> sequence) or a character
560  <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>  <code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code>
561  <em class=rfc2119>MAY</em> be used as a newline instead.</p>  <em class=rfc2119>MAY</em> be used as a <a href="#newline">newline</a> instead.
562    <a href="#newline">Newline</a> representations
563    <em class=rfc2119>SHOULD</em> be consistent in an
564    <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
565    representation.</p>
566    
567  <div class="note memo">  <div class="note memo">
568  <p>Therefore, when  <p>Therefore, newlines must be normalized before
569  <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>  <abbr title="Selectors Serialization Format for Testing">SSFT</abbr>
570  representations are literally compared, newlines must be normalized.</p>  representations are literally compared.</p>
571    </div>
572    
573  </div>  </div>
574    
575  </div>  </div>
# Line 504  by choosing <q>Selectors</q> radio butto Line 666  by choosing <q>Selectors</q> radio butto
666    <code class=URI>&lt;<a href="http://dev.w3.org/2006/webapi/selectors-api/Overview.html">http://dev.w3.org/2006/webapi/selectors-api/Overview.html</a>></code>.    <code class=URI>&lt;<a href="http://dev.w3.org/2006/webapi/selectors-api/Overview.html">http://dev.w3.org/2006/webapi/selectors-api/Overview.html</a>></code>.
667    The latest published version of the specification is available at    The latest published version of the specification is available at
668    <code class=URI>&lt;<a href="http://www.w3.org/TR/selectors-api/">http://www.w3.org/TR/selectors-api/</a>></code>.</dd>    <code class=URI>&lt;<a href="http://www.w3.org/TR/selectors-api/">http://www.w3.org/TR/selectors-api/</a>></code>.</dd>
669  <dt id=XBL2>XBL2</dt>  <dt id=ref-XBL2>XBL2</dt>
670    <dd><cite><a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr>XBL</abbr>    <dd><cite><a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr>XBL</abbr>
671    2.0</a></cite>, Mozilla.org, <time datetime=2007-03-15>15 Mar 2007</time>.    2.0</a></cite>, Mozilla.org, <time datetime=2007-03-15>15 Mar 2007</time>.
672    Work in progress.  The latest    Work in progress.  The latest
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