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[Bug 10964] New: Canvas needs to support a backing store in the DOM subtree capable of supporting screen reading

From: <bugzilla@jessica.w3.org>
Date: Sat, 02 Oct 2010 00:16:35 +0000
To: public-html@w3.org
Message-ID: <bug-10964-2495@http.www.w3.org/Bugs/Public/>

           Summary: Canvas needs to support a backing store in the DOM
                    subtree capable of supporting screen reading
           Product: HTML WG
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec (editor: Ian Hickson)
        AssignedTo: ian@hixie.ch
        ReportedBy: schwer@us.ibm.com
         QAContact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-wg-issue-tracking@w3.org,

In order to support a text editing in the subtree and ensure properer
positioning of text canvas must support:

- application of CSS to the canvas subtree even though the content is hidden to
support proper text layout and support a screen reader

- provisions for capturing events used in contenteditable areas to allow for
backingstore synchronization with the visual canvas. Examples of these event
capture of text events, selection, and text insertion, text deletion, and caret
movement, within contenteditable areas in the canvas subtree also known as
fallback content. This is to allow synchronization with visual canvas to allow
an accessible one for one mapping. 

- Functions for retrieving selected text ranges and the caret position in
content editable areas

Given the deadline tonight and the early stages of our addressing building a
backing store for <canvas> I was asked to put what may be needed in the backing

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Received on Saturday, 2 October 2010 00:16:37 UTC

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