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1 | 1 | // Copyright (c) IPython Development Team. |
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2 | 2 | // Distributed under the terms of the Modified BSD License. |
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3 | 3 | /** |
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4 | 4 | * |
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5 | 5 | * |
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6 | 6 | * @module keyboard |
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7 | 7 | * @namespace keyboard |
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8 | 8 | * @class ShortcutManager |
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9 | 9 | */ |
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10 | 10 | |
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11 | 11 | define([ |
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12 | 12 | 'base/js/namespace', |
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13 | 13 | 'jquery', |
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14 | 14 | 'base/js/utils', |
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15 | 15 | 'underscore', |
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16 | 16 | ], function(IPython, $, utils, _) { |
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17 | 17 | "use strict"; |
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18 | 18 | |
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19 | 19 | |
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20 | 20 | /** |
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21 | 21 | * Setup global keycodes and inverse keycodes. |
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22 | 22 | * |
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23 | 23 | * See http://unixpapa.com/js/key.html for a complete description. The short of |
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24 | 24 | * it is that there are different keycode sets. Firefox uses the "Mozilla keycodes" |
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25 | 25 | * and Webkit/IE use the "IE keycodes". These keycode sets are mostly the same |
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26 | 26 | * but have minor differences. |
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27 | 27 | **/ |
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28 | 28 | |
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29 | 29 | // These apply to Firefox, (Webkit and IE) |
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30 | 30 | // This does work **only** on US keyboard. |
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31 | 31 | var _keycodes = { |
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32 | 32 | 'a': 65, 'b': 66, 'c': 67, 'd': 68, 'e': 69, 'f': 70, 'g': 71, 'h': 72, 'i': 73, |
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33 | 33 | 'j': 74, 'k': 75, 'l': 76, 'm': 77, 'n': 78, 'o': 79, 'p': 80, 'q': 81, 'r': 82, |
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34 | 34 | 's': 83, 't': 84, 'u': 85, 'v': 86, 'w': 87, 'x': 88, 'y': 89, 'z': 90, |
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35 | 35 | '1 !': 49, '2 @': 50, '3 #': 51, '4 $': 52, '5 %': 53, '6 ^': 54, |
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36 | 36 | '7 &': 55, '8 *': 56, '9 (': 57, '0 )': 48, |
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37 | 37 | '[ {': 219, '] }': 221, '` ~': 192, ', <': 188, '. >': 190, '/ ?': 191, |
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38 | 38 | '\\ |': 220, '\' "': 222, |
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39 | 39 | 'numpad0': 96, 'numpad1': 97, 'numpad2': 98, 'numpad3': 99, 'numpad4': 100, |
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40 | 40 | 'numpad5': 101, 'numpad6': 102, 'numpad7': 103, 'numpad8': 104, 'numpad9': 105, |
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41 | 41 | 'multiply': 106, 'add': 107, 'subtract': 109, 'decimal': 110, 'divide': 111, |
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42 | 42 | 'f1': 112, 'f2': 113, 'f3': 114, 'f4': 115, 'f5': 116, 'f6': 117, 'f7': 118, |
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43 | 43 | 'f8': 119, 'f9': 120, 'f11': 122, 'f12': 123, 'f13': 124, 'f14': 125, 'f15': 126, |
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44 | 44 | 'backspace': 8, 'tab': 9, 'enter': 13, 'shift': 16, 'ctrl': 17, 'alt': 18, |
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45 | 45 | 'meta': 91, 'capslock': 20, 'esc': 27, 'space': 32, 'pageup': 33, 'pagedown': 34, |
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46 | 46 | 'end': 35, 'home': 36, 'left': 37, 'up': 38, 'right': 39, 'down': 40, |
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47 | 47 | 'insert': 45, 'delete': 46, 'numlock': 144, |
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48 | 48 | }; |
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49 | 49 | |
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50 | 50 | // These apply to Firefox and Opera |
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51 | 51 | var _mozilla_keycodes = { |
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52 | 52 | '; :': 59, '= +': 61, '- _': 173, 'meta': 224 |
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53 | 53 | }; |
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54 | 54 | |
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55 | 55 | // This apply to Webkit and IE |
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56 | 56 | var _ie_keycodes = { |
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57 | 57 | '; :': 186, '= +': 187, '- _': 189 |
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58 | 58 | }; |
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59 | 59 | |
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60 | 60 | var browser = utils.browser[0]; |
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61 | 61 | var platform = utils.platform; |
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62 | 62 | |
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63 | 63 | if (browser === 'Firefox' || browser === 'Opera' || browser === 'Netscape') { |
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64 | 64 | $.extend(_keycodes, _mozilla_keycodes); |
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65 | 65 | } else if (browser === 'Safari' || browser === 'Chrome' || browser === 'MSIE') { |
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66 | 66 | $.extend(_keycodes, _ie_keycodes); |
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67 | 67 | } |
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68 | 68 | |
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69 | 69 | var keycodes = {}; |
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70 | 70 | var inv_keycodes = {}; |
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71 | 71 | for (var name in _keycodes) { |
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72 | 72 | var names = name.split(' '); |
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73 | 73 | if (names.length === 1) { |
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74 | 74 | var n = names[0]; |
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75 | 75 | keycodes[n] = _keycodes[n]; |
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76 | 76 | inv_keycodes[_keycodes[n]] = n; |
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77 | 77 | } else { |
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78 | 78 | var primary = names[0]; |
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79 | 79 | var secondary = names[1]; |
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80 | 80 | keycodes[primary] = _keycodes[name]; |
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81 | 81 | keycodes[secondary] = _keycodes[name]; |
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82 | 82 | inv_keycodes[_keycodes[name]] = primary; |
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83 | 83 | } |
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84 | 84 | } |
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85 | 85 | |
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86 | 86 | var normalize_key = function (key) { |
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87 | 87 | return inv_keycodes[keycodes[key]]; |
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88 | 88 | }; |
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89 | 89 | |
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90 | 90 | var normalize_shortcut = function (shortcut) { |
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91 | 91 | /** |
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92 | 92 | * @function _normalize_shortcut |
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93 | 93 | * @private |
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94 | 94 | * return a dict containing the normalized shortcut and the number of time it should be pressed: |
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95 | 95 | * |
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96 | 96 | * Put a shortcut into normalized form: |
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97 | 97 | * 1. Make lowercase |
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98 | 98 | * 2. Replace cmd by meta |
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99 | 99 | * 3. Sort '-' separated modifiers into the order alt-ctrl-meta-shift |
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100 | 100 | * 4. Normalize keys |
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101 | 101 | **/ |
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102 | 102 | if (platform === 'MacOS') { |
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103 | 103 | shortcut = shortcut.toLowerCase().replace('cmdtrl-', 'cmd-'); |
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104 | 104 | } else { |
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105 | 105 | shortcut = shortcut.toLowerCase().replace('cmdtrl-', 'ctrl-'); |
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106 | 106 | } |
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107 | 107 | |
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108 | 108 | shortcut = shortcut.toLowerCase().replace('cmd', 'meta'); |
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109 | 109 | shortcut = shortcut.replace(/-$/, '_'); // catch shortcuts using '-' key |
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110 | 110 | shortcut = shortcut.replace(/,$/, 'comma'); // catch shortcuts using '-' key |
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111 | 111 | if(shortcut.indexOf(',') !== -1){ |
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112 | 112 | var sht = shortcut.split(','); |
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113 | 113 | sht = _.map(sht, normalize_shortcut); |
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114 | 114 | return shortcut; |
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115 | 115 | } |
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116 | 116 | shortcut = shortcut.replace(/comma/g, ','); // catch shortcuts using '-' key |
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117 | 117 | var values = shortcut.split("-"); |
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118 | 118 | if (values.length === 1) { |
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119 | 119 | return normalize_key(values[0]); |
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120 | 120 | } else { |
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121 | 121 | var modifiers = values.slice(0,-1); |
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122 | 122 | var key = normalize_key(values[values.length-1]); |
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123 | 123 | modifiers.sort(); |
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124 | 124 | return modifiers.join('-') + '-' + key; |
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125 | 125 | } |
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126 | 126 | }; |
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127 | 127 | |
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128 | 128 | var shortcut_to_event = function (shortcut, type) { |
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129 | 129 | /** |
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130 | 130 | * Convert a shortcut (shift-r) to a jQuery Event object |
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131 | 131 | **/ |
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132 | 132 | type = type || 'keydown'; |
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133 | 133 | shortcut = normalize_shortcut(shortcut); |
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134 | 134 | shortcut = shortcut.replace(/-$/, '_'); // catch shortcuts using '-' key |
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135 | 135 | var values = shortcut.split("-"); |
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136 | 136 | var modifiers = values.slice(0,-1); |
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137 | 137 | var key = values[values.length-1]; |
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138 | 138 | var opts = {which: keycodes[key]}; |
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139 | 139 | if (modifiers.indexOf('alt') !== -1) {opts.altKey = true;} |
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140 | 140 | if (modifiers.indexOf('ctrl') !== -1) {opts.ctrlKey = true;} |
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141 | 141 | if (modifiers.indexOf('meta') !== -1) {opts.metaKey = true;} |
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142 | 142 | if (modifiers.indexOf('shift') !== -1) {opts.shiftKey = true;} |
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143 | 143 | return $.Event(type, opts); |
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144 | 144 | }; |
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145 | 145 | |
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146 | 146 | var only_modifier_event = function(event){ |
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147 | 147 | /** |
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148 | 148 | * Return `true` if the event only contains modifiers keys. |
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149 | 149 | * false otherwise |
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150 | 150 | **/ |
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151 | 151 | var key = inv_keycodes[event.which]; |
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152 | 152 | return ((event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) && |
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153 | 153 | (key === 'alt'|| key === 'ctrl'|| key === 'meta'|| key === 'shift')); |
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154 | 154 | |
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155 | 155 | }; |
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156 | 156 | |
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157 | 157 | var event_to_shortcut = function (event) { |
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158 | 158 | /** |
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159 | 159 | * Convert a jQuery Event object to a normalized shortcut string (shift-r) |
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160 | 160 | **/ |
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161 | 161 | var shortcut = ''; |
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162 | 162 | var key = inv_keycodes[event.which]; |
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163 | 163 | if (event.altKey && key !== 'alt') {shortcut += 'alt-';} |
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164 | 164 | if (event.ctrlKey && key !== 'ctrl') {shortcut += 'ctrl-';} |
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165 | 165 | if (event.metaKey && key !== 'meta') {shortcut += 'meta-';} |
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166 | 166 | if (event.shiftKey && key !== 'shift') {shortcut += 'shift-';} |
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167 | 167 | shortcut += key; |
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168 | 168 | return shortcut; |
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169 | 169 | }; |
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170 | 170 | |
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171 | 171 | // Shortcut manager class |
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172 | 172 | |
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173 | 173 | var ShortcutManager = function (delay, events, actions, env) { |
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174 | 174 | /** |
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175 | 175 | * A class to deal with keyboard event and shortcut |
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176 | 176 | * |
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177 | 177 | * @class ShortcutManager |
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178 | 178 | * @constructor |
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179 | 179 | */ |
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180 | 180 | this._shortcuts = {}; |
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181 | 181 | this.delay = delay || 800; // delay in milliseconds |
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182 | 182 | this.events = events; |
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183 | 183 | this.actions = actions; |
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184 | 184 | this.actions.extend_env(env); |
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185 | 185 | this._queue = []; |
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186 | 186 | this._cleartimeout = null; |
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187 | 187 | Object.seal(this); |
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188 | 188 | }; |
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189 | 189 | |
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190 | 190 | ShortcutManager.prototype.clearsoon = function(){ |
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191 | 191 | /** |
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192 | 192 | * Clear the pending shortcut soon, and cancel previous clearing |
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193 | 193 | * that might be registered. |
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194 | 194 | **/ |
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195 | 195 | var that = this; |
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196 | 196 | clearTimeout(this._cleartimeout); |
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197 | 197 | this._cleartimeout = setTimeout(function(){that.clearqueue();}, this.delay); |
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198 | 198 | }; |
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199 | 199 | |
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200 | 200 | |
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201 | 201 | ShortcutManager.prototype.clearqueue = function(){ |
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202 | 202 | /** |
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203 | 203 | * clear the pending shortcut sequence now. |
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204 | 204 | **/ |
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205 | 205 | this._queue = []; |
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206 | 206 | clearTimeout(this._cleartimeout); |
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207 | 207 | }; |
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208 | 208 | |
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209 | 209 | |
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210 | 210 | var flatten_shorttree = function(tree){ |
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211 | 211 | /** |
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212 | 212 | * Flatten a tree of shortcut sequences. |
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213 | 213 | * use full to iterate over all the key/values of available shortcuts. |
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214 | 214 | **/ |
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215 | 215 | var dct = {}; |
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216 | 216 | for(var key in tree){ |
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217 | 217 | var value = tree[key]; |
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218 | 218 | if(typeof(value) === 'string'){ |
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219 | 219 | dct[key] = value; |
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220 | 220 | } else { |
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221 | 221 | var ftree=flatten_shorttree(value); |
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222 | 222 | for(var subkey in ftree){ |
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223 | 223 | dct[key+','+subkey] = ftree[subkey]; |
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224 | 224 | } |
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225 | 225 | } |
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226 | 226 | } |
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227 | 227 | return dct; |
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228 | 228 | }; |
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229 | 229 | |
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230 | 230 | ShortcutManager.prototype.help = function () { |
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231 | 231 | var help = []; |
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232 | 232 | var ftree = flatten_shorttree(this._shortcuts); |
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233 | 233 | for (var shortcut in ftree) { |
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234 | 234 | var action = this.actions.get(ftree[shortcut]); |
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235 | 235 | var help_string = action.help||'== no help =='; |
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236 | 236 | var help_index = action.help_index; |
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237 | 237 | if (help_string) { |
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238 | 238 | var shortstring = (action.shortstring||shortcut); |
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239 | 239 | help.push({ |
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240 | 240 | shortcut: shortstring, |
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241 | 241 | help: help_string, |
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242 | 242 | help_index: help_index} |
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243 | 243 | ); |
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244 | 244 | } |
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245 | 245 | } |
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246 | 246 | help.sort(function (a, b) { |
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247 |
if (a.help_index |
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247 | if (a.help_index === b.help_index) { | |
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248 | return 0; | |
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249 | } | |
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250 | if (a.help_index === undefined || a.help_index > b.help_index){ | |
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248 | 251 | return 1; |
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249 | 252 | } |
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250 | if (a.help_index < b.help_index){ | |
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251 | 253 |
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252 | } | |
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253 | return 0; | |
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254 | 254 | }); |
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255 | 255 | return help; |
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256 | 256 | }; |
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257 | 257 | |
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258 | 258 | ShortcutManager.prototype.clear_shortcuts = function () { |
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259 | 259 | this._shortcuts = {}; |
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260 | 260 | }; |
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261 | 261 | |
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262 | 262 | ShortcutManager.prototype.get_shortcut = function (shortcut){ |
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263 | 263 | /** |
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264 | 264 | * return a node of the shortcut tree which an action name (string) if leaf, |
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265 | 265 | * and an object with `object.subtree===true` |
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266 | 266 | **/ |
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267 | 267 | if(typeof(shortcut) === 'string'){ |
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268 | 268 | shortcut = shortcut.split(','); |
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269 | 269 | } |
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270 | 270 | |
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271 | 271 | return this._get_leaf(shortcut, this._shortcuts); |
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272 | 272 | }; |
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273 | 273 | |
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274 | 274 | |
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275 | 275 | ShortcutManager.prototype._get_leaf = function(shortcut_array, tree){ |
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276 | 276 | /** |
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277 | 277 | * @private |
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278 | 278 | * find a leaf/node in a subtree of the keyboard shortcut |
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279 | 279 | * |
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280 | 280 | **/ |
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281 | 281 | if(shortcut_array.length === 1){ |
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282 | 282 | return tree[shortcut_array[0]]; |
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283 | 283 | } else if( typeof(tree[shortcut_array[0]]) !== 'string'){ |
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284 | 284 | return this._get_leaf(shortcut_array.slice(1), tree[shortcut_array[0]]); |
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285 | 285 | } |
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286 | 286 | return null; |
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287 | 287 | }; |
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288 | 288 | |
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289 | 289 | ShortcutManager.prototype.set_shortcut = function( shortcut, action_name){ |
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290 | 290 | if( typeof(action_name) !== 'string'){ throw('action is not a string', action_name);} |
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291 | 291 | if( typeof(shortcut) === 'string'){ |
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292 | 292 | shortcut = shortcut.split(','); |
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293 | 293 | } |
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294 | 294 | return this._set_leaf(shortcut, action_name, this._shortcuts); |
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295 | 295 | }; |
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296 | 296 | |
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297 | 297 | ShortcutManager.prototype._is_leaf = function(shortcut_array, tree){ |
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298 | 298 | if(shortcut_array.length === 1){ |
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299 | 299 | return(typeof(tree[shortcut_array[0]]) === 'string'); |
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300 | 300 | } else { |
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301 | 301 | var subtree = tree[shortcut_array[0]]; |
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302 | 302 | return this._is_leaf(shortcut_array.slice(1), subtree ); |
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303 | 303 | } |
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304 | 304 | }; |
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305 | 305 | |
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306 | 306 | ShortcutManager.prototype._remove_leaf = function(shortcut_array, tree, allow_node){ |
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307 | 307 | if(shortcut_array.length === 1){ |
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308 | 308 | var current_node = tree[shortcut_array[0]]; |
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309 | 309 | if(typeof(current_node) === 'string'){ |
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310 | 310 | delete tree[shortcut_array[0]]; |
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311 | 311 | } else { |
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312 | 312 | throw('try to delete non-leaf'); |
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313 | 313 | } |
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314 | 314 | } else { |
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315 | 315 | this._remove_leaf(shortcut_array.slice(1), tree[shortcut_array[0]], allow_node); |
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316 | 316 | if(_.keys(tree[shortcut_array[0]]).length === 0){ |
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317 | 317 | delete tree[shortcut_array[0]]; |
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318 | 318 | } |
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319 | 319 | } |
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320 | 320 | }; |
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321 | 321 | |
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322 | 322 | ShortcutManager.prototype._set_leaf = function(shortcut_array, action_name, tree){ |
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323 | 323 | var current_node = tree[shortcut_array[0]]; |
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324 | 324 | if(shortcut_array.length === 1){ |
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325 | 325 | if(current_node !== undefined && typeof(current_node) !== 'string'){ |
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326 | 326 | console.warn('[warning], you are overriting a long shortcut with a shorter one'); |
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327 | 327 | } |
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328 | 328 | tree[shortcut_array[0]] = action_name; |
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329 | 329 | return true; |
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330 | 330 | } else { |
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331 | 331 | if(typeof(current_node) === 'string'){ |
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332 | 332 | console.warn('you are trying to set a shortcut that will be shadowed'+ |
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333 | 333 | 'by a more specific one. Aborting for :', action_name, 'the follwing '+ |
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334 | 334 | 'will take precedence', current_node); |
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335 | 335 | return false; |
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336 | 336 | } else { |
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337 | 337 | tree[shortcut_array[0]] = tree[shortcut_array[0]]||{}; |
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338 | 338 | } |
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339 | 339 | this._set_leaf(shortcut_array.slice(1), action_name, tree[shortcut_array[0]]); |
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340 | 340 | return true; |
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341 | 341 | } |
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342 | 342 | }; |
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343 | 343 | |
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344 | 344 | ShortcutManager.prototype.add_shortcut = function (shortcut, data, suppress_help_update) { |
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345 | 345 | /** |
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346 | 346 | * Add a action to be handled by shortcut manager. |
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347 | 347 | * |
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348 | 348 | * - `shortcut` should be a `Shortcut Sequence` of the for `Ctrl-Alt-C,Meta-X`... |
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349 | 349 | * - `data` could be an `action name`, an `action` or a `function`. |
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350 | 350 | * if a `function` is passed it will be converted to an anonymous `action`. |
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351 | 351 | * |
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352 | 352 | **/ |
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353 | 353 | var action_name = this.actions.get_name(data); |
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354 | 354 | if (! action_name){ |
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355 | 355 | throw('does nto know how to deal with ', data); |
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356 | 356 | } |
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357 | 357 | |
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358 | 358 | shortcut = normalize_shortcut(shortcut); |
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359 | 359 | this.set_shortcut(shortcut, action_name); |
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360 | 360 | |
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361 | 361 | if (!suppress_help_update) { |
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362 | 362 | // update the keyboard shortcuts notebook help |
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363 | 363 | this.events.trigger('rebuild.QuickHelp'); |
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364 | 364 | } |
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365 | 365 | }; |
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366 | 366 | |
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367 | 367 | ShortcutManager.prototype.add_shortcuts = function (data) { |
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368 | 368 | /** |
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369 | 369 | * Convenient methods to call `add_shortcut(key, value)` on several items |
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370 | 370 | * |
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371 | 371 | * data : Dict of the form {key:value, ...} |
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372 | 372 | **/ |
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373 | 373 | for (var shortcut in data) { |
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374 | 374 | this.add_shortcut(shortcut, data[shortcut], true); |
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375 | 375 | } |
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376 | 376 | // update the keyboard shortcuts notebook help |
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377 | 377 | this.events.trigger('rebuild.QuickHelp'); |
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378 | 378 | }; |
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379 | 379 | |
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380 | 380 | ShortcutManager.prototype.remove_shortcut = function (shortcut, suppress_help_update) { |
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381 | 381 | /** |
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382 | 382 | * Remove the binding of shortcut `sortcut` with its action. |
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383 | 383 | * throw an error if trying to remove a non-exiting shortcut |
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384 | 384 | **/ |
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385 | 385 | shortcut = normalize_shortcut(shortcut); |
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386 | 386 | if( typeof(shortcut) === 'string'){ |
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387 | 387 | shortcut = shortcut.split(','); |
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388 | 388 | } |
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389 | 389 | this._remove_leaf(shortcut, this._shortcuts); |
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390 | 390 | if (!suppress_help_update) { |
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391 | 391 | // update the keyboard shortcuts notebook help |
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392 | 392 | this.events.trigger('rebuild.QuickHelp'); |
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393 | 393 | } |
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394 | 394 | }; |
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395 | 395 | |
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396 | 396 | |
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397 | 397 | |
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398 | 398 | ShortcutManager.prototype.call_handler = function (event) { |
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399 | 399 | /** |
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400 | 400 | * Call the corresponding shortcut handler for a keyboard event |
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401 | 401 | * @method call_handler |
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402 | 402 | * @return {Boolean} `true|false`, `false` if no handler was found, otherwise the value return by the handler. |
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403 | 403 | * @param event {event} |
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404 | 404 | * |
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405 | 405 | * given an event, call the corresponding shortcut. |
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406 | 406 | * return false is event wan handled, true otherwise |
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407 | 407 | * in any case returning false stop event propagation |
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408 | 408 | **/ |
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409 | 409 | |
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410 | 410 | |
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411 | 411 | this.clearsoon(); |
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412 | 412 | if(only_modifier_event(event)){ |
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413 | 413 | return true; |
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414 | 414 | } |
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415 | 415 | var shortcut = event_to_shortcut(event); |
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416 | 416 | this._queue.push(shortcut); |
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417 | 417 | var action_name = this.get_shortcut(this._queue); |
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418 | 418 | |
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419 | 419 | if (typeof(action_name) === 'undefined'|| action_name === null){ |
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420 | 420 | this.clearqueue(); |
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421 | 421 | return true; |
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422 | 422 | } |
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423 | 423 | |
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424 | 424 | if (this.actions.exists(action_name)) { |
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425 | 425 | event.preventDefault(); |
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426 | 426 | this.clearqueue(); |
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427 | 427 | return this.actions.call(action_name, event); |
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428 | 428 | } |
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429 | 429 | |
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430 | 430 | return false; |
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431 | 431 | }; |
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432 | 432 | |
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433 | 433 | |
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434 | 434 | ShortcutManager.prototype.handles = function (event) { |
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435 | 435 | var shortcut = event_to_shortcut(event); |
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436 | 436 | var action_name = this.get_shortcut(this._queue.concat(shortcut)); |
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437 | 437 | return (typeof(action_name) !== 'undefined'); |
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438 | 438 | }; |
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439 | 439 | |
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440 | 440 | var keyboard = { |
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441 | 441 | keycodes : keycodes, |
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442 | 442 | inv_keycodes : inv_keycodes, |
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443 | 443 | ShortcutManager : ShortcutManager, |
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444 | 444 | normalize_key : normalize_key, |
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445 | 445 | normalize_shortcut : normalize_shortcut, |
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446 | 446 | shortcut_to_event : shortcut_to_event, |
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447 | 447 | event_to_shortcut : event_to_shortcut, |
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448 | 448 | }; |
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449 | 449 | |
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450 | 450 | // For backwards compatibility. |
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451 | 451 | IPython.keyboard = keyboard; |
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452 | 452 | |
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453 | 453 | return keyboard; |
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454 | 454 | }); |
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