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1 | 1 | //---------------------------------------------------------------------------- |
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2 | 2 | // Copyright (C) 2011 The IPython Development Team |
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3 | 3 | // |
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4 | 4 | // Distributed under the terms of the BSD License. The full license is in |
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5 | 5 | // the file COPYING, distributed as part of this software. |
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6 | 6 | //---------------------------------------------------------------------------- |
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7 | 7 | |
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8 | 8 | //============================================================================ |
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9 | 9 | // Keyboard management |
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10 | 10 | //============================================================================ |
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11 | 11 | |
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12 | 12 | IPython.namespace('IPython.keyboard'); |
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13 | 13 | |
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14 | 14 | IPython.keyboard = (function (IPython) { |
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15 | 15 | "use strict"; |
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16 | 16 | |
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17 | 17 | // Setup global keycodes and inverse keycodes. |
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18 | 18 | |
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19 | 19 | // See http://unixpapa.com/js/key.html for a complete description. The short of |
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20 | 20 | // it is that there are different keycode sets. Firefox uses the "Mozilla keycodes" |
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21 | 21 | // and Webkit/IE use the "IE keycodes". These keycode sets are mostly the same |
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22 | 22 | // but have minor differences. |
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23 | 23 | |
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24 | 24 | // These apply to Firefox, (Webkit and IE) |
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25 | 25 | var _keycodes = { |
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26 | 26 | 'a': 65, 'b': 66, 'c': 67, 'd': 68, 'e': 69, 'f': 70, 'g': 71, 'h': 72, 'i': 73, |
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27 | 27 | 'j': 74, 'k': 75, 'l': 76, 'm': 77, 'n': 78, 'o': 79, 'p': 80, 'q': 81, 'r': 82, |
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28 | 28 | 's': 83, 't': 84, 'u': 85, 'v': 86, 'w': 87, 'x': 88, 'y': 89, 'z': 90, |
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29 | 29 | '1 !': 49, '2 @': 50, '3 #': 51, '4 $': 52, '5 %': 53, '6 ^': 54, |
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30 | 30 | '7 &': 55, '8 *': 56, '9 (': 57, '0 )': 48, |
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31 | 31 | '[ {': 219, '] }': 221, '` ~': 192, ', <': 188, '. >': 190, '/ ?': 191, |
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32 | 32 | '\\ |': 220, '\' "': 222, |
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33 | 33 | 'numpad0': 96, 'numpad1': 97, 'numpad2': 98, 'numpad3': 99, 'numpad4': 100, |
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34 | 34 | 'numpad5': 101, 'numpad6': 102, 'numpad7': 103, 'numpad8': 104, 'numpad9': 105, |
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35 | 35 | 'multiply': 106, 'add': 107, 'subtract': 109, 'decimal': 110, 'divide': 111, |
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36 | 36 | 'f1': 112, 'f2': 113, 'f3': 114, 'f4': 115, 'f5': 116, 'f6': 117, 'f7': 118, |
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37 | 37 | 'f8': 119, 'f9': 120, 'f11': 122, 'f12': 123, 'f13': 124, 'f14': 125, 'f15': 126, |
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38 | 38 | 'backspace': 8, 'tab': 9, 'enter': 13, 'shift': 16, 'ctrl': 17, 'alt': 18, |
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39 | 39 | 'meta': 91, 'capslock': 20, 'esc': 27, 'space': 32, 'pageup': 33, 'pagedown': 34, |
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40 | 40 | 'end': 35, 'home': 36, 'left': 37, 'up': 38, 'right': 39, 'down': 40, |
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41 | 41 | 'insert': 45, 'delete': 46, 'numlock': 144, |
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42 | 42 | }; |
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43 | 43 | |
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44 | 44 | // These apply to Firefox and Opera |
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45 | 45 | var _mozilla_keycodes = { |
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46 | 46 | '; :': 59, '= +': 61, '- _': 173, 'meta': 224 |
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47 | 47 | }; |
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48 | 48 | |
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49 | 49 | // This apply to Webkit and IE |
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50 | 50 | var _ie_keycodes = { |
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51 | 51 | '; :': 186, '= +': 187, '- _': 189 |
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52 | 52 | }; |
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53 | 53 | |
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54 | 54 | var browser = IPython.utils.browser[0]; |
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55 | 55 | var platform = IPython.utils.platform; |
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56 | 56 | |
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57 | 57 | if (browser === 'Firefox' || browser === 'Opera' || browser === 'Netscape') { |
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58 | 58 | $.extend(_keycodes, _mozilla_keycodes); |
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59 | 59 | } else if (browser === 'Safari' || browser === 'Chrome' || browser === 'MSIE') { |
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60 | 60 | $.extend(_keycodes, _ie_keycodes); |
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61 | 61 | } |
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62 | 62 | |
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63 | 63 | var keycodes = {}; |
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64 | 64 | var inv_keycodes = {}; |
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65 | 65 | for (var name in _keycodes) { |
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66 | 66 | var names = name.split(' '); |
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67 | 67 | if (names.length === 1) { |
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68 | 68 | var n = names[0]; |
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69 | 69 | keycodes[n] = _keycodes[n]; |
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70 | 70 | inv_keycodes[_keycodes[n]] = n; |
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71 | 71 | } else { |
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72 | 72 | var primary = names[0]; |
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73 | 73 | var secondary = names[1]; |
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74 | 74 | keycodes[primary] = _keycodes[name]; |
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75 | 75 | keycodes[secondary] = _keycodes[name]; |
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76 | 76 | inv_keycodes[_keycodes[name]] = primary; |
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77 | 77 | } |
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78 | 78 | } |
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79 | 79 | |
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80 | 80 | var normalize_key = function (key) { |
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81 | 81 | return inv_keycodes[keycodes[key]]; |
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82 | 82 | }; |
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83 | 83 | |
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84 | 84 | var normalize_shortcut = function (shortcut) { |
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85 | 85 | // Put a shortcut into normalized form: |
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86 | 86 | // 1. Make lowercase |
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87 | 87 | // 2. Replace cmd by meta |
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88 | 88 | // 3. Sort '-' separated modifiers into the order alt-ctrl-meta-shift |
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89 | 89 | // 4. Normalize keys |
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90 | 90 | shortcut = shortcut.toLowerCase().replace('cmd', 'meta'); |
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91 | 91 | shortcut = shortcut.replace(/-$/, '_'); // catch shortcuts using '-' key |
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92 | 92 | var values = shortcut.split("-"); |
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93 | 93 | if (values.length === 1) { |
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94 | 94 | return normalize_key(values[0]); |
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95 | 95 | } else { |
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96 | 96 | var modifiers = values.slice(0,-1); |
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97 | 97 | var key = normalize_key(values[values.length-1]); |
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98 | 98 | modifiers.sort(); |
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99 | 99 | return modifiers.join('-') + '-' + key; |
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100 | 100 | } |
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101 | 101 | }; |
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102 | 102 | |
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103 | 103 | var shortcut_to_event = function (shortcut, type) { |
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104 | 104 | // Convert a shortcut (shift-r) to a jQuery Event object |
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105 | 105 | type = type || 'keydown'; |
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106 | 106 | shortcut = normalize_shortcut(shortcut); |
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107 | 107 | shortcut = shortcut.replace(/-$/, '_'); // catch shortcuts using '-' key |
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108 | 108 | var values = shortcut.split("-"); |
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109 | 109 | var modifiers = values.slice(0,-1); |
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110 | 110 | var key = values[values.length-1]; |
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111 | 111 | var opts = {which: keycodes[key]}; |
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112 | 112 | if (modifiers.indexOf('alt') !== -1) {opts.altKey = true;} |
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113 | 113 | if (modifiers.indexOf('ctrl') !== -1) {opts.ctrlKey = true;} |
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114 | 114 | if (modifiers.indexOf('meta') !== -1) {opts.metaKey = true;} |
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115 | 115 | if (modifiers.indexOf('shift') !== -1) {opts.shiftKey = true;} |
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116 | 116 | return $.Event(type, opts); |
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117 | 117 | }; |
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118 | 118 | |
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119 | 119 | var event_to_shortcut = function (event) { |
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120 | 120 | // Convert a jQuery Event object to a shortcut (shift-r) |
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121 | 121 | var shortcut = ''; |
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122 | 122 | var key = inv_keycodes[event.which]; |
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123 | 123 | if (event.altKey && key !== 'alt') {shortcut += 'alt-';} |
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124 | 124 | if (event.ctrlKey && key !== 'ctrl') {shortcut += 'ctrl-';} |
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125 | 125 | if (event.metaKey && key !== 'meta') {shortcut += 'meta-';} |
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126 | 126 | if (event.shiftKey && key !== 'shift') {shortcut += 'shift-';} |
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127 | 127 | shortcut += key; |
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128 | 128 | return shortcut; |
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129 | 129 | }; |
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130 | 130 | |
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131 | 131 | // Shortcut manager class |
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132 | 132 | |
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133 | 133 | var ShortcutManager = function (delay) { |
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134 | 134 | this._shortcuts = {}; |
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135 | 135 | this._counts = {}; |
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136 | 136 | this._timers = {}; |
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137 | 137 | this.delay = delay || 800; // delay in milliseconds |
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138 | 138 | }; |
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139 | 139 | |
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140 | 140 | ShortcutManager.prototype.help = function () { |
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141 | 141 | var help = []; |
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142 | 142 | for (var shortcut in this._shortcuts) { |
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143 | 143 | var help_string = this._shortcuts[shortcut]['help']; |
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144 | 144 | var help_index = this._shortcuts[shortcut]['help_index']; |
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145 | 145 | if (help_string) { |
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146 | 146 | if (platform === 'MacOS') { |
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147 | 147 | shortcut = shortcut.replace('meta', 'cmd'); |
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148 | 148 | } |
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149 | 149 | help.push({ |
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150 | 150 | shortcut: shortcut, |
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151 | 151 | help: help_string, |
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152 | 152 | help_index: help_index} |
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153 | 153 | ); |
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154 | 154 | } |
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155 | 155 | } |
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156 | 156 | help.sort(function (a, b) { |
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157 | 157 | if (a.help_index > b.help_index) |
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158 | 158 | return 1; |
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159 | 159 | if (a.help_index < b.help_index) |
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160 | 160 | return -1; |
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161 | 161 | return 0; |
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162 | 162 | }); |
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163 | 163 | return help; |
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164 | 164 | }; |
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165 | 165 | |
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166 | 166 | ShortcutManager.prototype.clear_shortcuts = function () { |
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167 | 167 | this._shortcuts = {}; |
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168 | 168 | }; |
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169 | 169 | |
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170 | 170 | ShortcutManager.prototype.add_shortcut = function (shortcut, data, suppress_help_update) { |
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171 | 171 | if (typeof(data) === 'function') { |
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172 | 172 | data = {help: '', help_index: '', handler: data}; |
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173 | 173 | } |
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174 | 174 | data.help_index = data.help_index || ''; |
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175 | 175 | data.help = data.help || ''; |
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176 | 176 | data.count = data.count || 1; |
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177 | 177 | if (data.help_index === '') { |
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178 | 178 | data.help_index = 'zz'; |
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179 | 179 | } |
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180 | 180 | shortcut = normalize_shortcut(shortcut); |
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181 | 181 | this._counts[shortcut] = 0; |
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182 | 182 | this._shortcuts[shortcut] = data; |
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183 | 183 | if (!suppress_help_update) { |
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184 | 184 | // update the keyboard shortcuts notebook help |
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185 | 185 | $([IPython.events]).trigger('rebuild.QuickHelp'); |
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186 | } | |
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186 | } | |
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187 | 187 | }; |
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188 | 188 | |
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189 | 189 | ShortcutManager.prototype.add_shortcuts = function (data) { |
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190 | 190 | for (var shortcut in data) { |
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191 | 191 | this.add_shortcut(shortcut, data[shortcut], true); |
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192 | 192 | } |
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193 | 193 | // update the keyboard shortcuts notebook help |
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194 | 194 | $([IPython.events]).trigger('rebuild.QuickHelp'); |
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195 | 195 | }; |
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196 | 196 | |
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197 | 197 | ShortcutManager.prototype.remove_shortcut = function (shortcut, suppress_help_update) { |
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198 | 198 | shortcut = normalize_shortcut(shortcut); |
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199 | 199 | delete this._counts[shortcut]; |
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200 | 200 | delete this._shortcuts[shortcut]; |
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201 | 201 | if (!suppress_help_update) { |
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202 | 202 | // update the keyboard shortcuts notebook help |
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203 | 203 | $([IPython.events]).trigger('rebuild.QuickHelp'); |
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204 | } | |
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204 | } | |
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205 | 205 | }; |
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206 | 206 | |
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207 | 207 | ShortcutManager.prototype.count_handler = function (shortcut, event, data) { |
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208 | 208 | var that = this; |
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209 | 209 | var c = this._counts; |
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210 | 210 | var t = this._timers; |
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211 | 211 | var timer = null; |
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212 | 212 | if (c[shortcut] === data.count-1) { |
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213 | 213 | c[shortcut] = 0; |
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214 | 214 | var timer = t[shortcut]; |
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215 | 215 | if (timer) {clearTimeout(timer); delete t[shortcut];} |
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216 | 216 | return data.handler(event); |
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217 | 217 | } else { |
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218 | 218 | c[shortcut] = c[shortcut] + 1; |
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219 | 219 | timer = setTimeout(function () { |
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220 | 220 | c[shortcut] = 0; |
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221 | 221 | }, that.delay); |
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222 | 222 | t[shortcut] = timer; |
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223 | 223 | } |
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224 | 224 | return false; |
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225 | 225 | }; |
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226 | 226 | |
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227 | 227 | ShortcutManager.prototype.call_handler = function (event) { |
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228 | 228 | var shortcut = event_to_shortcut(event); |
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229 | 229 | var data = this._shortcuts[shortcut]; |
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230 | 230 | if (data) { |
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231 | 231 | var handler = data['handler']; |
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232 | 232 | if (handler) { |
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233 | 233 | if (data.count === 1) { |
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234 | 234 | return handler(event); |
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235 | 235 | } else if (data.count > 1) { |
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236 | 236 | return this.count_handler(shortcut, event, data); |
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237 | 237 | } |
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238 | 238 | } |
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239 | 239 | } |
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240 | 240 | return true; |
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241 | 241 | }; |
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242 | 242 | |
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243 | 243 | ShortcutManager.prototype.handles = function (event) { |
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244 | 244 | var shortcut = event_to_shortcut(event); |
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245 | 245 | var data = this._shortcuts[shortcut]; |
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246 | 246 | return !( data === undefined ) |
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247 | 247 | } |
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248 | 248 | |
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249 | 249 | return { |
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250 | 250 | keycodes : keycodes, |
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251 | 251 | inv_keycodes : inv_keycodes, |
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252 | 252 | ShortcutManager : ShortcutManager, |
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253 | 253 | normalize_key : normalize_key, |
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254 | 254 | normalize_shortcut : normalize_shortcut, |
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255 | 255 | shortcut_to_event : shortcut_to_event, |
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256 | 256 | event_to_shortcut : event_to_shortcut |
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257 | 257 | }; |
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258 | 258 | |
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259 | 259 | }(IPython)); |
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