contentEditable cells

[mpatel]

Experiments with new cell representations. See, e.g.,

 wysiwyg mathematics

 A variation on Rado's graph editor

[mpatel]

The new version should work in FF 3/3.5. Nearly all of the changes are cosmetic. See the code for details. I didn't address the problems with iframes, since it's likely we'll go with another approach.

[mpatel]

External window

[mpatel]

For what it's worth, I've attached an example that launches Rado's graph editor in a new, potentially reusable window, from a notebook cell. Suggested directions:

• Put graphed_ext.html and processing.editor.min.js in $SAGE_ROOT/local/notebook/javascript/. I haven't edited the enclosed  Processing library, but it may be different from Rado's latest.
• Load graphed.txt as a worksheet. The serialization code is from Rado's recent post about his elegant inline editor for the notebook.
• Try, e.g., g = graphs.CubeGraph(4), followed by graph_editor(g, 'g_mod'), say. A pop-up blocker may complain. I just allowed pop-ups from localhost.
• See, e.g.,  this link for various window options. To open the editor in a tab, check the browser settings for overrides and use var win = window.open(url, name); with the appropriate url and some name. Different names will yield separate windows (or tabs). The browser's security policy may prevent some actions, e.g., re-establishing client-side connections to reloaded parent worksheets.

It may be better to make some server-side changes. Again, this is just an example.

A possible extension is the ability to keep a list of graphs in the new window and edit and export them in a random-access fashion --- a graph browser, perhaps. Another is sharing an editor among multiple open worksheets. The work on tearing out docstrings is somewhat related (cf. #6001).

Feel free to ask questions and make suggestions, though I'm a bit JavaScripted out just now...

[mpatel]

The proper ticket for an interactive graph editor in Sage is actually #1321. Sorry!

[mpatel]

I think the scope here is too wide. Please close this ticket.