My custom.js for the new IPython notebook 2.0 UI

custom.js

// leave at least 2 line with only a star on it below, or doc generation fails
/**
 * 
 *
 */

 
/*
 * Wait for app_initialized.NotebookApp trigger
 */
$([IPython.events]).on('app_initialized.NotebookApp', function(){ 

/* load extensions */
    require(['/static/custom/breakpoints.js'])
    require(['/static/custom/comment.js'])
    require(['/static/custom/shift-tab.js'])
    require(['/static/custom/printview_button.js'])
    require(['/static/custom/codefolding/codefolding.js'])   

    
/* add custom shortcuts */
var add_command_shortcuts = {
        'esc' : {
            help    : 'edit mode',
            help_index : 'aa',
            handler : function (event) {
                IPython.notebook.edit_mode();
                return false;
            }
        }, 

        'home' : {
            help    : 'go to top',
            help_index : 'ga',
            handler : function (event) {
				IPython.notebook.select(0);
				IPython.notebook.scroll_to_top()
                return false;
            }
        }, 

        'end' : {
            help    : 'go to bottom',
            help_index : 'ga',
            handler : function (event) {
				var ncells = IPython.notebook.ncells();
				IPython.notebook.select(ncells-1);
				IPython.notebook.scroll_to_bottom()
				return false;
            }
        }, 

        'pageup' : {
            help    : 'page up',
            help_index : 'aa',
            handler : function (event) {
            var wh = 0.6 * $(window).height();
            var cell = IPython.notebook.get_selected_cell();
            var h = 0;
            /* loop until we have enough cells to span the size of the notebook window (= one page) */
            do {
                h += cell.element.height();
                IPython.notebook.select_prev();
                cell = IPython.notebook.get_selected_cell();
            } while ( h < wh )
			cell.focus_cell();
            return false;
            }
        }, 

		'pagedown' : {
            help    : 'page down',
            help_index : 'aa',
            handler : function (event) {

            /* jump to bottom if we are already in the last cell */
            var ncells = IPython.notebook.ncells();
            if ( IPython.notebook.get_selected_index()+1 == ncells) {
                IPython.notebook.scroll_to_bottom();
                return false;
            }            
            
            var wh = 0.6*$(window).height();
            var cell = IPython.notebook.get_selected_cell();
            var h = 0;
            
            /* loop until we have enough cells to span the size of the notebook window (= one page) */
            do {
                h += cell.element.height();
                IPython.notebook.select_next();
                cell = IPython.notebook.get_selected_cell();
            } while ( h < wh )
			cell.focus_cell();
            return false;
            }
        }, 

        'ctrl+end' : {
            help    : 'run from current cell to end',
            help_index : 'xy',
            handler : function (event) {
                IPython.notebook.execute_cells_below();
                return false;
            }
        },
    };

IPython.keyboard_manager.command_shortcuts.add_shortcuts(add_command_shortcuts);

var add_edit_shortcuts = {
        'alt+plus' : {
            help    : 'split cell',
            help_index : 'ea',
            handler : function (event) {
                IPython.notebook.split_cell();
                IPython.notebook.edit_mode();
                return false;
            }
        },
        'alt+add' : {
            help    : 'split cell',
            help_index : 'eb',
            handler : function (event) {
                IPython.notebook.split_cell();
                IPython.notebook.edit_mode();                
                return false;
            }
        },
        'alt+-' : {
            help    : 'merge cell',
            help_index : 'ea',
            handler : function (event) {
                var i = IPython.notebook.get_selected_index();
                if (i > 0) {
                    var c = IPython.notebook.get_cell(i-1);
                    var l = c.code_mirror.lineCount();
                    IPython.notebook.merge_cell_above();
                    var c = IPython.notebook.get_selected_cell();
                    c.code_mirror.setCursor(l,0);
                    }
                return false;
            }
        },
        'alt+subtract' : {
            help    : 'merge cell',
            help_index : 'eb',
            handler : function (event) {
                var i = IPython.notebook.get_selected_index();
                if (i > 0) {
                    var c = IPython.notebook.get_cell(i-1);
                    var l = c.code_mirror.lineCount();
                    IPython.notebook.merge_cell_above();
                    var c = IPython.notebook.get_selected_cell();
                    c.code_mirror.setCursor(l,0);
                    }
            }
        },        
        'shift+enter' : {
            help    : 'run cell',
            help_index : 'ba',
            handler : function (event) {
                IPython.notebook.execute_cell();
				var cell = IPython.notebook.get_selected_cell();
				if ((cell instanceof IPython.CodeCell)) {
					IPython.notebook.edit_mode();
				}
                return false;
            }
        },
        'ctrl+enter' : {
            help    : 'run cell, select next codecell',
            help_index : 'bb',
            handler : function (event) {
                IPython.notebook.execute_cell_and_select_below();
                // find next CodeCell and go into edit mode if possible, else stay in next cell
                for (var i = IPython.notebook.get_selected_index(); i < IPython.notebook.ncells() ;i++) {
                    var cell = IPython.notebook.get_cell(i);
                    if (cell instanceof IPython.CodeCell) {
                        IPython.notebook.select(i);
                        IPython.notebook.edit_mode();
                        break;
                    }
				}
                return false;
            }
        },
        'ctrl+home' : {
            help    : 'go to top',
            help_index : 'ga',
            handler : function (event) {
				IPython.notebook.select(0);
				IPython.notebook.scroll_to_top()
                return false;
            }
        }, 

        'ctrl+end' : {
            help    : 'go to bottom',
            help_index : 'ga',
            handler : function (event) {
				var ncells = IPython.notebook.ncells();
				IPython.notebook.select(ncells-1);
				IPython.notebook.scroll_to_bottom()
				return false;
            }
        }, 
        'alt+n' : {
            help    : 'toggle line numbers',
            help_index : 'xy',
            handler : function (event) {
                var cell = IPython.notebook.get_selected_cell();
                cell.toggle_line_numbers();
                return false;
            }
        },
        
	};

IPython.keyboard_manager.edit_shortcuts.add_shortcuts(add_edit_shortcuts);


});

/* override clipboard 'paste' and insert new cell from json data in clipboard
 * works only with chrome
 */
window.addEventListener('paste', function(event){
    var cell = IPython.notebook.get_selected_cell(); 
    if (cell.mode == "command" ) {
      event.preventDefault();
      var data = event.clipboardData.getData('application/json');
      var new_cell_data = JSON.parse(data);
      var new_cell = IPython.notebook.insert_cell_below(new_cell_data.cell_type);
      new_cell.fromJSON(new_cell_data);
      }
});

/* override clipboard 'copy' and copy current cell as json and text to clipboard
 * works only with chrome
 */
window.addEventListener('copy', function(event){
    
    var cell = IPython.notebook.get_selected_cell();
    if (cell.mode == "command") {  
        event.preventDefault();
        var j = cell.toJSON();
        var json = JSON.stringify(j);           
        var text = cell.code_mirror.getValue();
        event.clipboardData.setData('application/json',json);        
        event.clipboardData.setData("Text", text);
    }
});    
/* override clipboard 'cut' and copy current cell as json and text to clipboard
 * works only with chrome
 */
window.addEventListener('cut', function(event){
    
    var cell = IPython.notebook.get_selected_cell();
    if (cell.mode == "command" ) {  
        event.preventDefault();
        var j = cell.toJSON();
        var json = JSON.stringify(j);
        var data = event.clipboardData.setData('application/json',json);
        var str = cell.code_mirror.getValue();
        event.clipboardData.setData("Text", str);
        IPython.notebook.delete_cell(IPython.notebook.find_cell_index(cell));
    }
});

/* Scroll notebook using the mouse wheel */
function MouseWheelHandler(e) {
    var cell = IPython.notebook.get_selected_cell();
    if (cell.mode == "command" ) {     
        e.preventDefault();
        var delta = Math.max(-1, Math.min(1, (e.wheelDelta || -e.detail)));
        if (delta == -1) {
            IPython.notebook.select_next();
            var ncells = IPython.notebook.ncells();
            if ( IPython.notebook.get_selected_index()+1 == ncells) {
                IPython.notebook.scroll_to_bottom();
            }
        } else {
            IPython.notebook.select_prev();        
        }
        cell = IPython.notebook.get_selected_cell();
        cell.focus_cell();
    }
	return false;
}    

var mywindow = window;
if (mywindow.addEventListener) {
	mywindow.addEventListener("mousewheel", MouseWheelHandler, false); // IE9, Chrome, Safari, Opera
	mywindow.addEventListener("DOMMouseScroll", MouseWheelHandler, false); // Firefox
}
else mywindow.attachEvent("onmousewheel", MouseWheelHandler); // IE 6/7/8