This updates CodeMirror and refactors a good bit of the notebook code related to it.
* Updated CodeMirror to the latest stable release.
* Fix numerous bugs related to the CM update.
* Refactored the Cell API and the notebook's cell handling methods.
* Generalized split/merge to work with all cell types.
* Generalized "Edit in Ace" to work with all cell types.
* Loading optimizations: pager starts out hidden, faster loads.
* Shading added to Markdown and HTML cells when they are being edited.
* This branch will require solid usability testing on Safari, FF and Chrome before merging.
* Fixed a number of CM related bugs.
two small heartbeat changes:
* flush outgoing heartbeats (notebook and parallel):
- Prevents mismatch between heartbeat timer and actual heartbeat send/recv events.
* relax default heartbeat period in IPython.parallel to 3s from 1s
- Matches heartbeats elsewhere. 3s should be extremely conservative, as most heartbeat responses are O(1ms) unless there's a bug in our code (like the above flush and previously-discovered GIL issues).
closes#1304
* Merge/split works for all cell types.
* Notebook.select won't select an already selected cell.
* Bugs in markdown cell editing fixed.
* border-box-sizing used for Markdown cells to get correct css boxes.
* Shading/border added to Markdown cell editor.
* Cell insertion code completely rewritten. We now have two methods
rather than 9: insert_cell_above, insert_cell_below.
* Renaming methods to be more consistent.
* Creating new methods to provide a uniform API.
* Minor bug fixes.
* Added placeholder to the base Cell class.
* Removed the \u0000 char at the beginning of the TextCell
placeholder that was there for a CodeMirror bug workaround.
* Other refactoring of Cell related Notebook methods.
* Added set_text/get_text in favor of get_code/set_code and
get_source/set_source.
* Added methods to the base class (get_text, set_text, refresh,
edit, render, toJSON, fromJSON).
When enabling paste, I was adding the click callback multiple
times causing paste to overwrite multiple cells. I also found
a bug that was doing paste above instead of paste below.
* QuickHelp button has been removed in favor of a Help menu item.
* Keyboard shortcuts are now in the menus.
* Numerous fixes to subtle aspects of the wijmenu implementation.
