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[Bug 14850] New: make unicode-bidi:isolate default for flow elements with a dir attribute too

From: <bugzilla@jessica.w3.org>
Date: Thu, 17 Nov 2011 09:55:52 +0000
To: public-html@w3.org
Message-ID: <bug-14850-2495@http.www.w3.org/Bugs/Public/>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=14850

           Summary: make unicode-bidi:isolate default for flow elements
                    with a dir attribute too
           Product: HTML WG
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: aharon.lists.lanin@gmail.com
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,
                    public-html@w3.org


The default stylesheet was changed in HTML5 (see
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10815) to specify
unicode-bidi:isolate for what used to be known as block elements
(http://dev.w3.org/html5/spec/Overview.html#flow-content-1,
http://dev.w3.org/html5/spec/Overview.html#sections-and-headings,
http://dev.w3.org/html5/spec/Overview.html#lists,
http://dev.w3.org/html5/spec/Overview.html#tables), instead of
unicode-bidi:embed. That's fine.

On the other hand, the default stylesheet rules dealing with the dir attribute
(http://dev.w3.org/html5/spec/Overview.html#bidirectional-text) specify
  [dir] { unicode-bidi: embed; }

This is fine for what used to be known as inline elements. However, as Simon
Montagu recently pointed out to me, this has greater specificity than the rules
for flow elements, and thus a "block" element with dir=ltr|rtl will get
unicode-bidi:embed by default. This was not the intent; "block" elements should
default to unicode-bidi:isolate whether they have a dir attribute or not.

One way to fix that would be to add rules explicitly covering the "block"
elements with a dir attribute to the four sections listed at the top of this
bug. For example, instead of having

  address, blockquote, center, div, figure, figcaption, footer, form,
      header, hr, legend, listing, p, plaintext, pre, summary, xmp {
    display: block; unicode-bidi: isolate;
  }

one could have

  address, address[dir], blockquote, blockquote[dir], center, center[dir],
      div, div[dir], figure, figure[dir], figcaption, figcaption[dir],
      footer, footer[dir], form, form[dir], header, header[dir], hr, hr[dir],
      legend, legend[dir], listing, listing[dir], p, p[dir],
      plaintext, plaintext[dir], pre, pre[dir], summary, summary[dir],
      xmp, xmp[dir] {
    display: block; unicode-bidi: isolate;
  }

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Received on Thursday, 17 November 2011 09:56:01 UTC

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