//----------------------------------------------------------------------------
// Copyright (C) 2011 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.
//----------------------------------------------------------------------------
//============================================================================
// Keyboard management
//============================================================================
var IPython = (function (IPython) {
"use strict";
// Setup global keycodes and inverse keycodes.
// See http://unixpapa.com/js/key.html for a complete description. The short of
// it is that there are different keycode sets. Firefox uses the "Mozilla keycodes"
// and Webkit/IE use the "IE keycodes". These keycode sets are mostly the same
// but have minor differences.
// These apply to Firefox, (Webkit and IE)
var _keycodes = {
'a': 65, 'b': 66, 'c': 67, 'd': 68, 'e': 69, 'f': 70, 'g': 71, 'h': 72, 'i': 73,
'j': 74, 'k': 75, 'l': 76, 'm': 77, 'n': 78, 'o': 79, 'p': 80, 'q': 81, 'r': 82,
's': 83, 't': 84, 'u': 85, 'v': 86, 'w': 87, 'x': 88, 'y': 89, 'z': 90,
'1 !': 49, '2 @': 50, '3 #': 51, '4 $': 52, '5 %': 53, '6 ^': 54,
'7 &': 55, '8 *': 56, '9 (': 57, '0 )': 48,
'[ {': 219, '] }': 221, '` ~': 192, ', <': 188, '. >': 190, '/ ?': 191,
'\\ |': 220, '\' "': 222,
'numpad0': 96, 'numpad1': 97, 'numpad2': 98, 'numpad3': 99, 'numpad4': 100,
'numpad5': 101, 'numpad6': 102, 'numpad7': 103, 'numpad8': 104, 'numpad9': 105,
'multiply': 106, 'add': 107, 'subtract': 109, 'decimal': 110, 'divide': 111,
'f1': 112, 'f2': 113, 'f3': 114, 'f4': 115, 'f5': 116, 'f6': 117, 'f7': 118,
'f8': 119, 'f9': 120, 'f11': 122, 'f12': 123, 'f13': 124, 'f14': 125, 'f15': 126,
'backspace': 8, 'tab': 9, 'enter': 13, 'shift': 16, 'ctrl': 17, 'alt': 18,
'meta': 91, 'capslock': 20, 'esc': 27, 'space': 32, 'pageup': 33, 'pagedown': 34,
'end': 35, 'home': 36, 'left': 37, 'up': 38, 'right': 39, 'down': 40,
'insert': 45, 'delete': 46, 'numlock': 144,
};
// These apply to Firefox and Opera
var _mozilla_keycodes = {
'; :': 59, '= +': 61, '- _': 173, 'meta': 224
}
// This apply to Webkit and IE
var _ie_keycodes = {
'; :': 186, '= +': 187, '- _': 189,
}
var browser = IPython.utils.browser[0];
if (browser === 'Firefox' || browser === 'Opera') {
$.extend(_keycodes, _mozilla_keycodes);
} else if (browser === 'Safari' || browser === 'Chrome' || browser === 'MSIE') {
$.extend(_keycodes, _ie_keycodes);
}
var keycodes = {};
var inv_keycodes = {};
for (var name in _keycodes) {
var names = name.split(' ');
if (names.length === 1) {
var n = names[0]
keycodes[n] = _keycodes[n]
inv_keycodes[_keycodes[n]] = n
} else {
var primary = names[0];
var secondary = names[1];
keycodes[primary] = _keycodes[name]
keycodes[secondary] = _keycodes[name]
inv_keycodes[_keycodes[name]] = primary
}
}
// Default keyboard shortcuts
var default_common_shortcuts = {
'meta+s' : {
help : 'save notebook',
help_index : 'fb',
handler : function (event) {
IPython.notebook.save_checkpoint();
event.preventDefault();
return false;
}
},
'ctrl+s' : {
help : 'save notebook',
help_index : 'fc',
handler : function (event) {
IPython.notebook.save_checkpoint();
event.preventDefault();
return false;
}
},
'shift' : {
help : '',
help_index : '',
handler : function (event) {
// ignore shift keydown
return true;
}
},
'shift+enter' : {
help : 'run cell',
help_index : 'ba',
handler : function (event) {
IPython.notebook.execute_cell();
return false;
}
},
'ctrl+enter' : {
help : 'run cell, select below',
help_index : 'bb',
handler : function (event) {
IPython.notebook.execute_cell_and_select_below();
return false;
}
},
'alt+enter' : {
help : 'run cell, insert below',
help_index : 'bc',
handler : function (event) {
IPython.notebook.execute_cell_and_insert_below();
return false;
}
}
}
// Edit mode defaults
var default_edit_shortcuts = {
'esc' : {
help : 'command mode',
help_index : 'aa',
handler : function (event) {
IPython.notebook.command_mode();
IPython.notebook.focus_cell();
return false;
}
},
'ctrl+m' : {
help : 'command mode',
help_index : 'ab',
handler : function (event) {
IPython.notebook.command_mode();
IPython.notebook.focus_cell();
return false;
}
},
'up' : {
help : '',
help_index : '',
handler : function (event) {
var cell = IPython.notebook.get_selected_cell();
if (cell && cell.at_top()) {
event.preventDefault();
IPython.notebook.command_mode()
IPython.notebook.select_prev();
IPython.notebook.edit_mode();
return false;
};
}
},
'down' : {
help : '',
help_index : '',
handler : function (event) {
var cell = IPython.notebook.get_selected_cell();
if (cell && cell.at_bottom()) {
event.preventDefault();
IPython.notebook.command_mode()
IPython.notebook.select_next();
IPython.notebook.edit_mode();
return false;
};
}
},
'alt+-' : {
help : 'split cell',
help_index : 'ea',
handler : function (event) {
IPython.notebook.split_cell();
return false;
}
},
'alt+subtract' : {
help : '',
help_index : 'eb',
handler : function (event) {
IPython.notebook.split_cell();
return false;
}
},
}
// Command mode defaults
var default_command_shortcuts = {
'enter' : {
help : 'edit mode',
help_index : 'aa',
handler : function (event) {
IPython.notebook.edit_mode();
return false;
}
},
'up' : {
help : 'select previous cell',
help_index : 'da',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
if (index !== 0 && index !== null) {
IPython.notebook.select_prev();
var cell = IPython.notebook.get_selected_cell();
cell.focus_cell();
};
return false;
}
},
'down' : {
help : 'select next cell',
help_index : 'db',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
if (index !== (IPython.notebook.ncells()-1) && index !== null) {
IPython.notebook.select_next();
var cell = IPython.notebook.get_selected_cell();
cell.focus_cell();
};
return false;
}
},
'k' : {
help : 'select previous cell',
help_index : 'dc',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
if (index !== 0 && index !== null) {
IPython.notebook.select_prev();
var cell = IPython.notebook.get_selected_cell();
cell.focus_cell();
};
return false;
}
},
'j' : {
help : 'select next cell',
help_index : 'dd',
handler : function (event) {
var index = IPython.notebook.get_selected_index();
if (index !== (IPython.notebook.ncells()-1) && index !== null) {
IPython.notebook.select_next();
var cell = IPython.notebook.get_selected_cell();
cell.focus_cell();
};
return false;
}
},
'x' : {
help : 'cut cell',
help_index : 'ee',
handler : function (event) {
IPython.notebook.cut_cell();
return false;
}
},
'c' : {
help : 'copy cell',
help_index : 'ef',
handler : function (event) {
IPython.notebook.copy_cell();
return false;
}
},
'v' : {
help : 'paste cell below',
help_index : 'eg',
handler : function (event) {
IPython.notebook.paste_cell_below();
return false;
}
},
'd' : {
help : 'delete cell (press twice)',
help_index : 'ei',
handler : function (event) {
var dc = IPython.keyboard_manager._delete_count;
if (dc === 0) {
IPython.keyboard_manager._delete_count = 1;
setTimeout(function () {
IPython.keyboard_manager._delete_count = 0;
}, 800);
} else if (dc === 1) {
IPython.notebook.delete_cell();
IPython.keyboard_manager._delete_count = 0;
}
return false;
}
},
'a' : {
help : 'insert cell above',
help_index : 'ec',
handler : function (event) {
IPython.notebook.insert_cell_above('code');
IPython.notebook.select_prev();
IPython.notebook.focus_cell();
return false;
}
},
'b' : {
help : 'insert cell below',
help_index : 'ed',
handler : function (event) {
IPython.notebook.insert_cell_below('code');
IPython.notebook.select_next();
IPython.notebook.focus_cell();
return false;
}
},
'y' : {
help : 'to code',
help_index : 'ca',
handler : function (event) {
IPython.notebook.to_code();
return false;
}
},
'm' : {
help : 'to markdown',
help_index : 'cb',
handler : function (event) {
IPython.notebook.to_markdown();
return false;
}
},
't' : {
help : 'to raw',
help_index : 'cc',
handler : function (event) {
IPython.notebook.to_raw();
return false;
}
},
'1' : {
help : 'to heading 1',
help_index : 'cd',
handler : function (event) {
IPython.notebook.to_heading(undefined, 1);
return false;
}
},
'2' : {
help : 'to heading 2',
help_index : 'ce',
handler : function (event) {
IPython.notebook.to_heading(undefined, 2);
return false;
}
},
'3' : {
help : 'to heading 3',
help_index : 'cf',
handler : function (event) {
IPython.notebook.to_heading(undefined, 3);
return false;
}
},
'4' : {
help : 'to heading 4',
help_index : 'cg',
handler : function (event) {
IPython.notebook.to_heading(undefined, 4);
return false;
}
},
'5' : {
help : 'to heading 5',
help_index : 'ch',
handler : function (event) {
IPython.notebook.to_heading(undefined, 5);
return false;
}
},
'6' : {
help : 'to heading 6',
help_index : 'ci',
handler : function (event) {
IPython.notebook.to_heading(undefined, 6);
return false;
}
},
'o' : {
help : 'toggle output',
help_index : 'gb',
handler : function (event) {
IPython.notebook.toggle_output();
return false;
}
},
'shift+o' : {
help : 'toggle output',
help_index : 'gc',
handler : function (event) {
IPython.notebook.toggle_output_scroll();
return false;
}
},
's' : {
help : 'save notebook',
help_index : 'fa',
handler : function (event) {
IPython.notebook.save_checkpoint();
return false;
}
},
'ctrl+j' : {
help : 'move cell down',
help_index : 'eb',
handler : function (event) {
IPython.notebook.move_cell_down();
return false;
}
},
'ctrl+k' : {
help : 'move cell up',
help_index : 'ea',
handler : function (event) {
IPython.notebook.move_cell_up();
return false;
}
},
'l' : {
help : 'toggle line numbers',
help_index : 'ga',
handler : function (event) {
IPython.notebook.cell_toggle_line_numbers();
return false;
}
},
'i' : {
help : 'interrupt kernel',
help_index : 'ha',
handler : function (event) {
IPython.notebook.kernel.interrupt();
return false;
}
},
'.' : {
help : 'restart kernel',
help_index : 'hb',
handler : function (event) {
IPython.notebook.restart_kernel();
return false;
}
},
'h' : {
help : 'keyboard shortcuts',
help_index : 'gd',
handler : function (event) {
IPython.quick_help.show_keyboard_shortcuts();
return false;
}
},
'z' : {
help : 'undo last delete',
help_index : 'eh',
handler : function (event) {
IPython.notebook.undelete_cell();
return false;
}
},
'shift+=' : {
help : 'merge cell below',
help_index : 'ej',
handler : function (event) {
IPython.notebook.merge_cell_below();
return false;
}
},
}
// Shortcut manager class
var ShortcutManager = function () {
this._shortcuts = {}
}
ShortcutManager.prototype.help = function () {
var help = [];
for (var shortcut in this._shortcuts) {
var help_string = this._shortcuts[shortcut]['help'];
var help_index = this._shortcuts[shortcut]['help_index'];
if (help_string) {
help.push({
shortcut: shortcut,
help: help_string,
help_index: help_index}
);
}
}
help.sort(function (a, b) {
if (a.help_index > b.help_index)
return 1;
if (a.help_index < b.help_index)
return -1;
return 0;
});
return help;
}
ShortcutManager.prototype.normalize_key = function (key) {
return inv_keycodes[keycodes[key]];
}
ShortcutManager.prototype.normalize_shortcut = function (shortcut) {
// Sort a sequence of + separated modifiers into the order alt+ctrl+meta+shift
var values = shortcut.split("+");
if (values.length === 1) {
return this.normalize_key(values[0])
} else {
var modifiers = values.slice(0,-1);
var key = this.normalize_key(values[values.length-1]);
modifiers.sort();
return modifiers.join('+') + '+' + key;
}
}
ShortcutManager.prototype.event_to_shortcut = function (event) {
// Convert a jQuery keyboard event to a strong based keyboard shortcut
var shortcut = '';
var key = inv_keycodes[event.which]
if (event.altKey && key !== 'alt') {shortcut += 'alt+';}
if (event.ctrlKey && key !== 'ctrl') {shortcut += 'ctrl+';}
if (event.metaKey && key !== 'meta') {shortcut += 'meta+';}
if (event.shiftKey && key !== 'shift') {shortcut += 'shift+';}
shortcut += key;
return shortcut
}
ShortcutManager.prototype.clear_shortcuts = function () {
this._shortcuts = {};
}
ShortcutManager.prototype.add_shortcut = function (shortcut, data) {
if (typeof(data) === 'function') {
data = {help: '', help_index: '', handler: data}
}
data.help_index = data.help_index || '';
data.help = data.help || '';
if (data.help_index === '') {
data.help_index = 'zz';
}
shortcut = this.normalize_shortcut(shortcut);
this._shortcuts[shortcut] = data;
}
ShortcutManager.prototype.add_shortcuts = function (data) {
for (var shortcut in data) {
this.add_shortcut(shortcut, data[shortcut]);
}
}
ShortcutManager.prototype.remove_shortcut = function (shortcut) {
shortcut = this.normalize_shortcut(shortcut);
delete this._shortcuts[shortcut];
}
ShortcutManager.prototype.call_handler = function (event) {
var shortcut = this.event_to_shortcut(event);
var data = this._shortcuts[shortcut];
if (data !== undefined) {
var handler = data['handler'];
if (handler !== undefined) {
return handler(event);
}
}
return true;
}
// Main keyboard manager for the notebook
var KeyboardManager = function () {
this.mode = 'command';
this.enabled = true;
this._delete_count = 0;
this.bind_events();
this.command_shortcuts = new ShortcutManager();
this.command_shortcuts.add_shortcuts(default_common_shortcuts);
this.command_shortcuts.add_shortcuts(default_command_shortcuts);
this.edit_shortcuts = new ShortcutManager();
this.edit_shortcuts.add_shortcuts(default_common_shortcuts);
this.edit_shortcuts.add_shortcuts(default_edit_shortcuts);
};
KeyboardManager.prototype.bind_events = function () {
var that = this;
$(document).keydown(function (event) {
return that.handle_keydown(event);
});
};
KeyboardManager.prototype.handle_keydown = function (event) {
var notebook = IPython.notebook;
if (event.which === keycodes['esc']) {
// Intercept escape at highest level to avoid closing
// websocket connection with firefox
event.preventDefault();
}
if (!this.enabled) {
if (event.which === keycodes['esc']) {
// ESC
notebook.command_mode();
return false;
}
return true;
}
if (this.mode === 'edit') {
return this.edit_shortcuts.call_handler(event);
} else if (this.mode === 'command') {
return this.command_shortcuts.call_handler(event);
}
return true;
}
KeyboardManager.prototype.edit_mode = function () {
this.last_mode = this.mode;
this.mode = 'edit';
}
KeyboardManager.prototype.command_mode = function () {
this.last_mode = this.mode;
this.mode = 'command';
}
KeyboardManager.prototype.enable = function () {
this.enabled = true;
}
KeyboardManager.prototype.disable = function () {
this.enabled = false;
}
KeyboardManager.prototype.register_events = function (e) {
var that = this;
e.on('focusin', function () {
that.command_mode();
that.disable();
});
e.on('focusout', function () {
that.command_mode();
that.enable();
});
// There are times (raw_input) where we remove the element from the DOM before
// focusout is called. In this case we bind to the remove event of jQueryUI,
// which gets triggered upon removal.
e.on('remove', function () {
that.command_mode();
that.enable();
});
}
IPython.keycodes = keycodes;
IPython.inv_keycodes = inv_keycodes;
IPython.default_common_shortcuts = default_common_shortcuts;
IPython.default_edit_shortcuts = default_edit_shortcuts;
IPython.default_command_shortcuts = default_command_shortcuts;
IPython.ShortcutManager = ShortcutManager;
IPython.KeyboardManager = KeyboardManager;
return IPython;
}(IPython));