From: Paul Libbrecht <paul@activemath.org>

Date: Mon, 27 Mar 2006 16:19:23 +0200

Message-ID: <4427F46B.4000905@activemath.org>

To: Public MathML mailing list <www-math@w3.org>

Date: Mon, 27 Mar 2006 16:19:23 +0200

Message-ID: <4427F46B.4000905@activemath.org>

To: Public MathML mailing list <www-math@w3.org>

Hello, in the experience of developing copy-and-paste of mathematical formulae for ActiveMath we came to the following two (ideal) requirements a browser should satisfy to provide user-friendly copy-and-paste of formulae. - one of them is to allow HTML-pages to receive and give clipboards content in a safe way... I'm pushing this idea at the public-webapi@w3.org mailing list currently - the other is more mathematical and is the subject of the mail: currently selection of formulae is done as text selection which often yields "non mathematical" results, such as the selection of "a+b" in "3*a+b". I am unclear about a clean definition of mathematical selection. The best I could find thus far would be to select "sub-terms" only which, I believe, correspond to subtrees in a MathML-content or OpenMath matching tree. Comments welcome there. How can we enable a "mathematical selection" ? A level 1 approach would be to rely directly on the tree structure of MathML-presentation, enlarging text selection by the smallest subtree containing it, this is not a complete solution as sometimes terms have to be output using several boxes... but it's an easy and universal one. A level 2 approach would be to work with parallel markup and enlarge any text selection to the presentation match of the smallest content-sub-tree containing the content-match of the smallest presentation sub-tree containing the selected text (!). Comments welcome! paulReceived on Monday, 27 March 2006 14:19:38 GMT

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