- From: poot <cvsmail@w3.org>
- Date: Tue, 5 Aug 2008 18:19:49 +0900 (JST)
- To: public-html-diffs@w3.org
Define 'directionality' in terms of the dir='' attribute for cases where
the 'direction' property has no computed value. (credit: db) (whatwg
r2001)
strokeText()
http://people.w3.org/mike/diffs/html5/spec/Overview.1.1190.html#stroketext
The directionality
http://people.w3.org/mike/diffs/html5/spec/Overview.1.1190.html#the-directionality
dir
http://people.w3.org/mike/diffs/html5/spec/Overview.1.1190.html#dir0
3.3.3.5. The dir attribute
http://people.w3.org/mike/diffs/html5/spec/Overview.1.1190.html#the-dir
http://people.w3.org/mike/diffs/html5/spec/Overview.diff.html
http://dev.w3.org/cvsweb/html5/spec/Overview.html?r1=1.1189&r2=1.1190&f=h
http://html5.org/tools/web-apps-tracker?from=2000&to=2001
===================================================================
RCS file: /sources/public/html5/spec/Overview.html,v
retrieving revision 1.1189
retrieving revision 1.1190
diff -u -d -r1.1189 -r1.1190
--- Overview.html 5 Aug 2008 07:58:07 -0000 1.1189
+++ Overview.html 5 Aug 2008 09:16:52 -0000 1.1190
@@ -8028,17 +8028,27 @@
<code title="">rtl</code> mapping to the state <em>rtl</em>. The attribute
has no defaults.
- <p>If the attribute has the state <em>ltr</em>, the element's
- directionality is left-to-right. If the attribute has the state
- <em>rtl</em>, the element's directionality is right-to-left. Otherwise,
- the element's directionality is the same as its parent element, or
- <em>ltr</em> if there is no parent element.
+ <p>The processing of this attribute is primarily performed by the
+ presentation layer. For example, CSS 2.1 defines a mapping from this
+ attribute to the CSS 'direction' and 'unicode-bidi' properties, and
+ defines rendering in terms of those properties.
- <p>The processing of this attribute depends on the presentation layer. For
- example, CSS 2.1 defines a mapping from this attribute to the CSS
- 'direction' and 'unicode-bidi' properties, and defines rendering in terms
- of those properties.</p>
- <!-- XXXDIR -->
+ <p><dfn id=the-directionality>The directionality</dfn> of an element, which
+ is used in particular by the <code><a href="#canvas">canvas</a></code>
+ element's text rendering API, is either 'ltr' or 'rtl'. If the user agent
+ supports CSS and the 'direction' property on this element has a computed
+ value of either 'ltr' or 'rtl', then that is <a
+ href="#the-directionality">the directionality</a> of the element.
+ Otherwise, if the element is being rendered, then <a
+ href="#the-directionality">the directionality</a> of the element is the
+ directionality used by the presentation layer, potentially determined from
+ the value of the <code title=attr-dir><a href="#dir">dir</a></code>
+ attribute on the element. Otherwise, if the element's <code
+ title=attr-dir><a href="#dir">dir</a></code> attribute has the state
+ <em>ltr</em>, the element's directionality is 'ltr' (left-to-right); if
+ the attribute has the state <em>rtl</em>, the element's directionality is
+ 'rtl' (right-to-left); and oherwise, the element's directionality is the
+ same as its parent element, or 'ltr' if there is no parent element.
<p>The <dfn id=dir0 title=dom-dir><code>dir</code></dfn> DOM attribute on
an element must <a href="#reflect">reflect</a> the <code title=attr-dir><a
@@ -22332,14 +22342,11 @@
<p>Form a hypothetical infinitely wide CSS line box containing a single
inline box containing the text <var title="">text</var>, with all the
properties at their initial values except the 'font' property of the
- inline element set to <var title="">font</var> and the 'direction'
- property of the inline element set to the 'direction' property of the
- <code><a href="#canvas">canvas</a></code> element. <a
- href="#references">[CSS]</a>
+ inline box set to <var title="">font</var> and the 'direction' property
+ of the inline box set to <a href="#the-directionality">the
+ directionality</a> of the <code><a href="#canvas">canvas</a></code>
+ element. <a href="#references">[CSS]</a>
</li>
- <!-- XXXDIR somehow mention
- somewhere that if you don't support CSS, dir="" still maps to
- 'direction' for the purposes of things like this. -->
<!-- if you insert a step here, make sure to adjust the next step's
final words -->
@@ -22367,13 +22374,13 @@
<dt> If <code title=dom-context-2d-textAlign><a
href="#textalign">textAlign</a></code> is <code title="">start</code>
- and the 'direction'<!--XXXDIR--> property on the <code><a
- href="#canvas">canvas</a></code> element has a computed value of 'ltr'
+ and <span>the directionality of the <code><a
+ href="#canvas">canvas</a></code> element is 'ltr'</span>
<dt> If <code title=dom-context-2d-textAlign><a
href="#textalign">textAlign</a></code> is <code title="">end</code> and
- the 'direction'<!--XXXDIR--> property on the <code><a
- href="#canvas">canvas</a></code> element has a computed value of 'rtl'
+ <span>the directionality of the <code><a
+ href="#canvas">canvas</a></code> element is 'rtl'</span>
<dd>Let the <var title="">anchor point</var>'s horizontal position be
the left edge of the inline box.
@@ -22383,13 +22390,13 @@
<dt> If <code title=dom-context-2d-textAlign><a
href="#textalign">textAlign</a></code> is <code title="">end</code> and
- the 'direction'<!--XXXDIR--> property on the <code><a
- href="#canvas">canvas</a></code> element has a computed value of 'ltr'
+ <span>the directionality of the <code><a
+ href="#canvas">canvas</a></code> element is 'ltr'</span>
<dt> If <code title=dom-context-2d-textAlign><a
href="#textalign">textAlign</a></code> is <code title="">start</code>
- and the 'direction'<!--XXXDIR--> property on the <code><a
- href="#canvas">canvas</a></code> element has a computed value of 'rtl'
+ and <span>the directionality of the <code><a
+ href="#canvas">canvas</a></code> element is 'rtl'</span>
<dd>Let the <var title="">anchor point</var>'s horizontal position be
the right edge of the inline box.
@@ -22517,10 +22524,10 @@
<li><p>Form a <em class="big-issue">whatever CSS ends up calling
vertical line boxes and inline boxes</em> containing the text <var
title="">text</var>, with all the properties at their initial
- values except the 'font' property of the inline element set to <var
+ values except the 'font' property of the inline box set to <var
title="">font</var> and the 'direction' property of the inline
- element set to the 'direction' property of the <code>canvas</code>
- element.</p></li><!- - XXXDIR - ->
+ box set to <span>the directionality<//span> of the <code>canvas</code>
+ element.</p></li>
<!- - if you insert a step here, make sure to adjust the next step's
final words - ->
@@ -22549,14 +22556,12 @@
title="">start</code></dt>
<dt> If <code
title="dom-context-2d-textAlign">textAlign</code> is <code
- title="">left</code> and the 'direction'<!- -XXXDIR- -> property
- on the <code>canvas</code> element has a computed value of
- 'ltr'</dt>
+ title="">left</code> and <span>the directionality<//span> of the
+ <code>canvas</code> element is 'ltr'</dt>
<dt> If <code
title="dom-context-2d-textAlign">textAlign</code> is <code
- title="">right</code> and the 'direction'<!- -XXXDIR- -> property
- on the <code>canvas</code> element has a computed value of
- 'rtl'</dt>
+ title="">right</code> and <span>the directionality<//span> of the
+ <code>canvas</code> element is 'rtl'</dt>
<dd>Let the <var title="">anchor point</var>'s vertical
position be the top edge of the <em class="big-issue">inline
@@ -22567,14 +22572,12 @@
title="">end</code></dt>
<dt> If <code
title="dom-context-2d-textAlign">textAlign</code> is <code
- title="">right</code> and the 'direction'<!- -XXXDIR- -> property
- on the <code>canvas</code> element has a computed value of
- 'ltr'</dt>
+ title="">right</code> and <span>the directionality<//span> of the
+ <code>canvas</code> element is 'ltr'</dt>
<dt> If <code
title="dom-context-2d-textAlign">textAlign</code> is <code
- title="">left</code> and the 'direction'<!- -XXXDIR- -> property on
- the <code>canvas</code> element has a computed value of
- 'rtl'</dt>
+ title="">left</code> and <span>the directionality<//span> of the
+ <code>canvas</code> element is 'rtl'</dt>
<dd>Let the <var title="">anchor point</var>'s vertical
position be the bottom edge of the <em class="big-issue">inline
Received on Tuesday, 5 August 2008 09:20:27 UTC