jupyter_contrib_nbextensions/split-combine.js

//  Copyright (C) 2013  The IPython Development Team
//
//  Distributed under the terms of the BSD License.  The full license is in
//  the file COPYING, distributed as part of this software.
//----------------------------------------------------------------------------

//============================================================================
// ALT+S         - split cell
// ALT+A         - merge with cell above
// ALT+B         - merge with cell below
//============================================================================

(function (IPython) {

    var key   = IPython.utils.keycodes;

    /**
     * Additional hotkeys for notebook
     *
     * @return {Boolean} return false to stop further key handling in notebook.js 
     */
    var document_keydown = function(event) {
           
        if (event.which == 83 && event.altKey) { /* ALT-S */
        IPython.notebook.split_cell();
            return false;
        };
        
        if (event.which == 65 && event.altKey) { /* ALT-A */
        IPython.notebook.merge_cell_above();
            return false;
        };
        
        if (event.which == 66 && event.altKey) { /* ALT-B */
        IPython.notebook.merge_cell_below();
            return false;
        };
        
       return true;
    };

    /**
     * Register onKeyEvent to codemirror for all cells
     * and global keydown event
     *
     */            
    init_keyevent = function(){
         IPython.toolbar.add_buttons_group([
                    {
                        id : 'split_cell',
                        label : 'Split cell into two',
                        icon : 'icon-resize-vertical',
                        callback : function () {IPython.notebook.split_cell();}
                    },
                    {
                        id : 'merge_cell_above',
                        label : 'Merge with cell above',
                        icon : 'icon-level-down',
                        callback : function () {IPython.notebook.merge_cell_above();}
                    },
                    {
                        id : 'merge_cell_below',
                        label : 'Merge with cell below',
                        icon : 'icon-level-up',
                        callback : function () {IPython.notebook.merge_cell_below();}
                    }
              ]);
         $(document).keydown( document_keydown );
    };
  
    $([IPython.events]).on('notebook_loaded.Notebook',init_keyevent);
    console.log("Split-Combine extension loaded correctly")
}(IPython));