[html5] r5700 - [e] (0) Clarify the way bidi interacts with alert() Fixing http://www.w3.org/Bug [...]
whatwg at whatwg.org
whatwg at whatwg.org
Fri Dec 3 15:54:21 PST 2010
Author: ianh
Date: 2010-12-03 15:54:20 -0800 (Fri, 03 Dec 2010)
New Revision: 5700
Modified:
complete.html
index
source
Log:
[e] (0) Clarify the way bidi interacts with alert()
Fixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=10827
Modified: complete.html
===================================================================
--- complete.html 2010-12-02 07:15:33 UTC (rev 5699)
+++ complete.html 2010-12-03 23:54:20 UTC (rev 5700)
@@ -214,7 +214,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/ rel=home><img alt=WHATWG height=101 src=/images/logo width=101></a></p>
<hgroup><h1>Web Applications 1.0</h1>
- <h2 class="no-num no-toc">Draft Standard — 2 December 2010</h2>
+ <h2 class="no-num no-toc">Draft Standard — 3 December 2010</h2>
</hgroup><p>You can take part in this work. <a href=http://www.whatwg.org/mailing-list>Join the working group's discussion list.</a></p>
<p><strong>Web designers!</strong> We have a <a href=http://blog.whatwg.org/faq/>FAQ</a>, a <a href=http://forums.whatwg.org/>forum</a>, and a <a href=http://www.whatwg.org/mailing-list#help>help mailing list</a> for you!</p>
<!--<p class="impl"><strong>Implementors!</strong> We have a <a href="http://www.whatwg.org/mailing-list#implementors">mailing list</a> for you too!</p>-->
@@ -87163,8 +87163,15 @@
as an independent set of one or more bidirectional algorithm
paragraphs when displayed, as defined by the bidirectional
algorithm, including, for instance, supporting the
- paragraph-breaking behaviour of U+000A LINE FEED (LF) characters. <a href=#refsBIDI>[BIDI]</a></p>
+ paragraph-breaking behaviour of U+000A LINE FEED (LF) characters.
+ For the purposes of determining the paragraph level of such text in
+ the bidirectional algorithm, this specification does <em>not</em>
+ provide a higher-level override of rules P2 and P3. <a href=#refsBIDI>[BIDI]</a></p>
+ <p>When necessary, authors can enforce a particular direction for a
+ given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
+ MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
+
<div class=example>
<p>Thus, the following script:</p>
@@ -87183,7 +87190,8 @@
<p>For a more complex example, consider the following script:</p>
- <pre>var s;
+ <pre class=bad>/* Warning: this script does not handle right-to-left scripts correctly */
+var s;
if (s = prompt('What is your name?')) {
alert(s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
}</pre>
@@ -87192,16 +87200,22 @@
alert "<samp>Kitty! Ok, Fred, Kitty, and Wilma will get the
car.</samp>". However, if the user enters "<kbd dir=rtl lang=ar>لا أفهم</kbd>",
then the bidirectional algorithm will determine that the direction
- of the paragraph is right-to-left, and so the output will be "<samp lang=""><bdo dir=rtl>لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"!</p>
+ of the paragraph is right-to-left, and so the output will be the
+ following unintended mess: "<samp lang=""><bdo dir=rtl>لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"</p>
+ <p>To force an alert that starts with user-provided text (or other
+ text of unknown directionality) to render left-to-right, the string
+ can be prefixed with a U+200E LEFT-TO-RIGHT MARK character:</p>
+
+ <pre>var s;
+if (s = prompt('What is your name?')) {
+ alert('<strong>\u200E</strong>' + s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
+}</pre>
+
</div>
- <p>When necessary, authors can enforce a particular direction for a
- given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
- MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
-
<h3 id=print-media><span class=secno>14.7 </span>Print media</h3>
<p>User agents are expected to allow the user to request the
Modified: index
===================================================================
--- index 2010-12-02 07:15:33 UTC (rev 5699)
+++ index 2010-12-03 23:54:20 UTC (rev 5700)
@@ -218,7 +218,7 @@
<header class=head id=head><p><a class=logo href=http://www.whatwg.org/ rel=home><img alt=WHATWG height=101 src=/images/logo width=101></a></p>
<hgroup><h1>HTML5 (including next generation additions still in development)</h1>
- <h2 class="no-num no-toc">Draft Standard — 2 December 2010</h2>
+ <h2 class="no-num no-toc">Draft Standard — 3 December 2010</h2>
</hgroup><p>You can take part in this work. <a href=http://www.whatwg.org/mailing-list>Join the working group's discussion list.</a></p>
<p><strong>Web designers!</strong> We have a <a href=http://blog.whatwg.org/faq/>FAQ</a>, a <a href=http://forums.whatwg.org/>forum</a>, and a <a href=http://www.whatwg.org/mailing-list#help>help mailing list</a> for you!</p>
<!--<p class="impl"><strong>Implementors!</strong> We have a <a href="http://www.whatwg.org/mailing-list#implementors">mailing list</a> for you too!</p>-->
@@ -83076,8 +83076,15 @@
as an independent set of one or more bidirectional algorithm
paragraphs when displayed, as defined by the bidirectional
algorithm, including, for instance, supporting the
- paragraph-breaking behaviour of U+000A LINE FEED (LF) characters. <a href=#refsBIDI>[BIDI]</a></p>
+ paragraph-breaking behaviour of U+000A LINE FEED (LF) characters.
+ For the purposes of determining the paragraph level of such text in
+ the bidirectional algorithm, this specification does <em>not</em>
+ provide a higher-level override of rules P2 and P3. <a href=#refsBIDI>[BIDI]</a></p>
+ <p>When necessary, authors can enforce a particular direction for a
+ given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
+ MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
+
<div class=example>
<p>Thus, the following script:</p>
@@ -83096,7 +83103,8 @@
<p>For a more complex example, consider the following script:</p>
- <pre>var s;
+ <pre class=bad>/* Warning: this script does not handle right-to-left scripts correctly */
+var s;
if (s = prompt('What is your name?')) {
alert(s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
}</pre>
@@ -83105,16 +83113,22 @@
alert "<samp>Kitty! Ok, Fred, Kitty, and Wilma will get the
car.</samp>". However, if the user enters "<kbd dir=rtl lang=ar>لا أفهم</kbd>",
then the bidirectional algorithm will determine that the direction
- of the paragraph is right-to-left, and so the output will be "<samp lang=""><bdo dir=rtl>لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"!</p>
+ of the paragraph is right-to-left, and so the output will be the
+ following unintended mess: "<samp lang=""><bdo dir=rtl>لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"</p>
+ <p>To force an alert that starts with user-provided text (or other
+ text of unknown directionality) to render left-to-right, the string
+ can be prefixed with a U+200E LEFT-TO-RIGHT MARK character:</p>
+
+ <pre>var s;
+if (s = prompt('What is your name?')) {
+ alert('<strong>\u200E</strong>' + s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
+}</pre>
+
</div>
- <p>When necessary, authors can enforce a particular direction for a
- given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
- MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
-
<h3 id=print-media><span class=secno>12.7 </span>Print media</h3>
<p>User agents are expected to allow the user to request the
Modified: source
===================================================================
--- source 2010-12-02 07:15:33 UTC (rev 5699)
+++ source 2010-12-03 23:54:20 UTC (rev 5700)
@@ -99902,9 +99902,16 @@
as an independent set of one or more bidirectional algorithm
paragraphs when displayed, as defined by the bidirectional
algorithm, including, for instance, supporting the
- paragraph-breaking behaviour of U+000A LINE FEED (LF) characters. <a
+ paragraph-breaking behaviour of U+000A LINE FEED (LF) characters.
+ For the purposes of determining the paragraph level of such text in
+ the bidirectional algorithm, this specification does <em>not</em>
+ provide a higher-level override of rules P2 and P3. <a
href="#refsBIDI">[BIDI]</a></p>
+ <p>When necessary, authors can enforce a particular direction for a
+ given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
+ MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
+
<div class="example">
<p>Thus, the following script:</p>
@@ -99923,7 +99930,8 @@
<p>For a more complex example, consider the following script:</p>
- <pre>var s;
+ <pre class="bad">/* Warning: this script does not handle right-to-left scripts correctly */
+var s;
if (s = prompt('What is your name?')) {
alert(s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
}</pre>
@@ -99933,18 +99941,23 @@
car.</samp>". However, if the user enters "<kbd dir="rtl"
lang="ar">لا أفهم</kbd>",
then the bidirectional algorithm will determine that the direction
- of the paragraph is right-to-left, and so the output will be "<samp
- lang=""><bdo
- dir="rtl">لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"!</p>
+ of the paragraph is right-to-left, and so the output will be the
+ following unintended mess: "<samp lang=""><bdo
+ dir="rtl">لا أفهم! derF ,kO, لا أفهم, rac eht teg lliw amliW dna.</bdo></samp>"</p>
+ <p>To force an alert that starts with user-provided text (or other
+ text of unknown directionality) to render left-to-right, the string
+ can be prefixed with a U+200E LEFT-TO-RIGHT MARK character:</p>
+
+ <pre>var s;
+if (s = prompt('What is your name?')) {
+ alert('<strong>\u200E</strong>' + s + '! Ok, Fred, ' + s + ', and Wilma will get the car.');
+}</pre>
+
</div>
- <p>When necessary, authors can enforce a particular direction for a
- given paragraph by starting it with the Unicode U+200E LEFT-TO-RIGHT
- MARK or U+200F RIGHT-TO-LEFT MARK characters.</p>
-
<h3>Print media</h3>
<p>User agents are expected to allow the user to request the
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