1.1 --- a/css-ruby/Overview.src.html Thu Aug 15 16:08:14 2013 -0700
1.2 +++ b/css-ruby/Overview.src.html Thu Aug 15 16:26:55 2013 -0700
1.3 @@ -642,13 +642,15 @@
1.4 <p class="issue">The easiest thing would be to treat each <i>ruby base</i> as an embedding of its 'direction'.
1.5 But this means that implicit bidi reordering is scoped to within a single base.
1.6
1.7 +<!--
1.8 +
1.9 <p>The Unicode bidirectional algorithm orders logically-stored text for visual presentation
1.10 when characters from scripts of opposing directionalities are mixed
1.11 within a single paragraph.
1.12 (See [[CSS3-WRITING-MODES]] for a more in-depth discussion of bidirectional text in CSS.)
1.13 Bidi reordering of ruby-annotation pairs is controlled by the ordering of the base text, as follows:
1.14
1.15 -<h4 id="bidi-B">Proposal B</h4>
1.16 +<h4 id="bidi-B">Proposal A</h4>
1.17
1.18 <p class="note">This proposal is simpler, but will require more frequent tagging of mixed-directionality content.
1.19
1.20 @@ -659,14 +661,17 @@
1.21 to their respective <i>ruby bases</i>,
1.22 a few restrictions are imposed:
1.23 <ul>
1.24 - <li>The contents of a <i>ruby base</i> must remain contiguous.
1.25 - To this end, the contents of
1.26 + <li>The contents of a <i>ruby base</i> or <i>ruby annotation</i> must remain contiguous.
1.27 + To this end, the contents of each <i>ruby base</i> and <i>ruby annotation</i> are treated as if within a <i>bidi isolation</i>.
1.28 + <li>For the purpose of ordering <i>ruby bases</i> within a <i>ruby container</i>,
1.29 + each <i>ruby base</i> is treated as a strong character of its specified 'direction'.
1.30 + (<i>Ruby annotations</i> are positioned with respect to their <i>bases</i>,
1.31 + so are affected by reordering, but do not themselves participate in reordering.)
1.32 <li>All <i>bases</i> spanned by a single <i>annotation</i> must remain contiguous.
1.33 + To this end, the embedding level of all bases spanned by a spanning <i>annotation</i>
1.34 + is increased by two prior to reordering.
1.35 </ul>
1.36
1.37 - <li>When a <i>ruby base</i> is moved due to bidi reordering,
1.38 - all of its corresponding <i>ruby annotations</i> must follow.
1.39 -
1.40 <h4 id="bidi-B">Proposal B</h4>
1.41
1.42 <p class="note">This preserves some aspects of implicit bidi.
1.43 @@ -681,7 +686,6 @@
1.44 to their respective <i>ruby bases</i>,
1.45 a few restrictions are imposed:
1.46 <ul>
1.47 - <li>
1.48 <li>The contents of a <i>ruby base</i> must remain contiguous.
1.49 <li>All <i>bases</i> spanned by a single <i>annotation</i> must remain contiguous.
1.50 </ul>
1.51 @@ -692,13 +696,6 @@
1.52 (or the embedding level assigned to the isolation, if the <i>ruby base</i> is <i>bidi-isolated</i>)
1.53 is further increased by two.
1.54
1.55 - <p>
1.56 -
1.57 -<!--
1.58 - <p>
1.59 - Each <i>ruby base</i> within a <i>ruby container</i> is treated
1.60 - as a strong character with the directionality of its 'direction' property.
1.61 - When resolving the embedding levels of
1.62 -->
1.63
1.64 <h3 id="line-height">
1.65 @@ -1407,7 +1404,8 @@
1.66 <!-- -->rb { display: ruby-base; white-space: nowrap; }
1.67 <!-- -->rt { display: ruby-text; white-space: nowrap; font-size: 50%; }
1.68 <!-- -->rbc { display: ruby-base-container; }
1.69 -<!-- -->rtc { display: ruby-text-container; }</pre>
1.70 +<!-- -->rtc { display: ruby-text-container; }
1.71 +<!-- -->ruby, rb, rt, rbc, rtc { unicode-bidi: isolate; }</pre>
1.72
1.73 <p>Additional rules for UAs supporting the relevant features of [[CSS3-TEXT-DECOR]] and [[CSS3-FONTS]]:
1.74 <pre>rt { font-variant-east-asian: ruby; text-emphasis: none; }</pre>
