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

From: <bugzilla@jessica.w3.org>
Date: Fri, 08 Oct 2010 12:47:39 +0000
To: public-html-a11y@w3.org
Message-Id: <E1P4CMN-0002zZ-RT@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=10964

--- Comment #4 from Rich Schwerdtfeger <schwer@us.ibm.com> 2010-10-08 12:47:38 UTC ---
The backing store is not the traditional backing store for what you would see
in say the X Windows System to handle offscreen bitmaps. It is a DOM based
backing store for what you see in the GUI. Every GUI RTE has one: Office, Open
Office, Chrome, FF, IE, etc. 

What is needed is a 1:1 mapping of the caret and selection information stored
in the DOM to the GUI rendering. To do that we need to be able to track the
caret and selection in the contenteditable areas. 

We are taking time to work this out.

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