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1 // CodeMirror, copyright (c) by Marijn Haverbeke and others
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2 // Distributed under an MIT license: https://codemirror.net/5/LICENSE
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3
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4 (function(mod) {
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5 if (typeof exports == "object" && typeof module == "object") // CommonJS
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6 mod(require("../lib/codemirror"));
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7 else if (typeof define == "function" && define.amd) // AMD
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8 define(["../lib/codemirror"], mod);
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9 else // Plain browser env
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10 mod(CodeMirror);
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11 })(function(CodeMirror) {
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12 "use strict";
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13
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14 var cmds = CodeMirror.commands;
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15 var Pos = CodeMirror.Pos;
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16 function posEq(a, b) { return a.line == b.line && a.ch == b.ch; }
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17
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18 // Kill 'ring'
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19
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20 var killRing = [];
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21 function addToRing(str) {
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22 killRing.push(str);
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23 if (killRing.length > 50) killRing.shift();
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24 }
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25 function growRingTop(str) {
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26 if (!killRing.length) return addToRing(str);
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27 killRing[killRing.length - 1] += str;
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28 }
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29 function getFromRing(n) { return killRing[killRing.length - (n ? Math.min(n, 1) : 1)] || ""; }
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30 function popFromRing() { if (killRing.length > 1) killRing.pop(); return getFromRing(); }
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31
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32 var lastKill = null;
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33
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34 // Internal generic kill function, used by several mapped kill "family" functions.
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35 function _kill(cm, from, to, ring, text) {
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36 if (text == null) text = cm.getRange(from, to);
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37
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38 if (ring == "grow" && lastKill && lastKill.cm == cm && posEq(from, lastKill.pos) && cm.isClean(lastKill.gen))
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39 growRingTop(text);
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40 else if (ring !== false)
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41 addToRing(text);
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42 cm.replaceRange("", from, to, "+delete");
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43
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44 if (ring == "grow") lastKill = {cm: cm, pos: from, gen: cm.changeGeneration()};
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45 else lastKill = null;
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46 }
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47
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48 // Boundaries of various units
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49
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50 function byChar(cm, pos, dir) {
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51 return cm.findPosH(pos, dir, "char", true);
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52 }
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53
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54 function byWord(cm, pos, dir) {
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55 return cm.findPosH(pos, dir, "word", true);
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56 }
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57
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58 function byLine(cm, pos, dir) {
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59 return cm.findPosV(pos, dir, "line", cm.doc.sel.goalColumn);
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60 }
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61
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62 function byPage(cm, pos, dir) {
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63 return cm.findPosV(pos, dir, "page", cm.doc.sel.goalColumn);
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64 }
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65
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66 function byParagraph(cm, pos, dir) {
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67 var no = pos.line, line = cm.getLine(no);
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68 var sawText = /\S/.test(dir < 0 ? line.slice(0, pos.ch) : line.slice(pos.ch));
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69 var fst = cm.firstLine(), lst = cm.lastLine();
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70 for (;;) {
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71 no += dir;
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72 if (no < fst || no > lst)
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73 return cm.clipPos(Pos(no - dir, dir < 0 ? 0 : null));
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74 line = cm.getLine(no);
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75 var hasText = /\S/.test(line);
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76 if (hasText) sawText = true;
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77 else if (sawText) return Pos(no, 0);
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78 }
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79 }
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80
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81 function bySentence(cm, pos, dir) {
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82 var line = pos.line, ch = pos.ch;
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83 var text = cm.getLine(pos.line), sawWord = false;
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84 for (;;) {
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85 var next = text.charAt(ch + (dir < 0 ? -1 : 0));
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86 if (!next) { // End/beginning of line reached
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87 if (line == (dir < 0 ? cm.firstLine() : cm.lastLine())) return Pos(line, ch);
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88 text = cm.getLine(line + dir);
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89 if (!/\S/.test(text)) return Pos(line, ch);
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90 line += dir;
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91 ch = dir < 0 ? text.length : 0;
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92 continue;
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93 }
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94 if (sawWord && /[!?.]/.test(next)) return Pos(line, ch + (dir > 0 ? 1 : 0));
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95 if (!sawWord) sawWord = /\w/.test(next);
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96 ch += dir;
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97 }
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98 }
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99
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100 function byExpr(cm, pos, dir) {
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101 var wrap;
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102 if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, {strict: true}))
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103 && wrap.match && (wrap.forward ? 1 : -1) == dir)
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104 return dir > 0 ? Pos(wrap.to.line, wrap.to.ch + 1) : wrap.to;
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105
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106 for (var first = true;; first = false) {
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107 var token = cm.getTokenAt(pos);
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108 var after = Pos(pos.line, dir < 0 ? token.start : token.end);
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109 if (first && dir > 0 && token.end == pos.ch || !/\w/.test(token.string)) {
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110 var newPos = cm.findPosH(after, dir, "char");
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111 if (posEq(after, newPos)) return pos;
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112 else pos = newPos;
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113 } else {
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114 return after;
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115 }
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116 }
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117 }
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118
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119 // Prefixes (only crudely supported)
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120
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121 function getPrefix(cm, precise) {
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122 var digits = cm.state.emacsPrefix;
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123 if (!digits) return precise ? null : 1;
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124 clearPrefix(cm);
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125 return digits == "-" ? -1 : Number(digits);
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126 }
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127
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128 function repeated(cmd) {
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129 var f = typeof cmd == "string" ? function(cm) { cm.execCommand(cmd); } : cmd;
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130 return function(cm) {
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131 var prefix = getPrefix(cm);
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132 f(cm);
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133 for (var i = 1; i < prefix; ++i) f(cm);
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134 };
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135 }
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136
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137 function findEnd(cm, pos, by, dir) {
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138 var prefix = getPrefix(cm);
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139 if (prefix < 0) { dir = -dir; prefix = -prefix; }
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140 for (var i = 0; i < prefix; ++i) {
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141 var newPos = by(cm, pos, dir);
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142 if (posEq(newPos, pos)) break;
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143 pos = newPos;
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144 }
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145 return pos;
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146 }
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147
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148 function move(by, dir) {
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149 var f = function(cm) {
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150 cm.extendSelection(findEnd(cm, cm.getCursor(), by, dir));
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151 };
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152 f.motion = true;
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153 return f;
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154 }
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155
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156 function killTo(cm, by, dir, ring) {
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157 var selections = cm.listSelections(), cursor;
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158 var i = selections.length;
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159 while (i--) {
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160 cursor = selections[i].head;
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161 _kill(cm, cursor, findEnd(cm, cursor, by, dir), ring);
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162 }
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163 }
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164
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165 function _killRegion(cm, ring) {
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166 if (cm.somethingSelected()) {
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167 var selections = cm.listSelections(), selection;
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168 var i = selections.length;
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169 while (i--) {
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170 selection = selections[i];
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171 _kill(cm, selection.anchor, selection.head, ring);
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172 }
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173 return true;
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174 }
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175 }
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176
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177 function addPrefix(cm, digit) {
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178 if (cm.state.emacsPrefix) {
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179 if (digit != "-") cm.state.emacsPrefix += digit;
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180 return;
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181 }
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182 // Not active yet
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183 cm.state.emacsPrefix = digit;
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184 cm.on("keyHandled", maybeClearPrefix);
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185 cm.on("inputRead", maybeDuplicateInput);
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186 }
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187
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188 var prefixPreservingKeys = {"Alt-G": true, "Ctrl-X": true, "Ctrl-Q": true, "Ctrl-U": true};
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189
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190 function maybeClearPrefix(cm, arg) {
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191 if (!cm.state.emacsPrefixMap && !prefixPreservingKeys.hasOwnProperty(arg))
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192 clearPrefix(cm);
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193 }
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194
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195 function clearPrefix(cm) {
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196 cm.state.emacsPrefix = null;
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197 cm.off("keyHandled", maybeClearPrefix);
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198 cm.off("inputRead", maybeDuplicateInput);
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199 }
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200
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201 function maybeDuplicateInput(cm, event) {
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202 var dup = getPrefix(cm);
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203 if (dup > 1 && event.origin == "+input") {
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204 var one = event.text.join("\n"), txt = "";
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205 for (var i = 1; i < dup; ++i) txt += one;
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206 cm.replaceSelection(txt);
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207 }
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208 }
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209
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210 function maybeRemovePrefixMap(cm, arg) {
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211 if (typeof arg == "string" && (/^\d$/.test(arg) || arg == "Ctrl-U")) return;
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212 cm.removeKeyMap(prefixMap);
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213 cm.state.emacsPrefixMap = false;
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214 cm.off("keyHandled", maybeRemovePrefixMap);
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215 cm.off("inputRead", maybeRemovePrefixMap);
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216 }
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217
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218 // Utilities
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219
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220 cmds.setMark = function (cm) {
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221 cm.setCursor(cm.getCursor());
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222 cm.setExtending(!cm.getExtending());
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223 cm.on("change", function() { cm.setExtending(false); });
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224 }
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225
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226 function clearMark(cm) {
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227 cm.setExtending(false);
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228 cm.setCursor(cm.getCursor());
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229 }
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230
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231 function makePrompt(msg) {
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232 var fragment = document.createDocumentFragment();
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233 var input = document.createElement("input");
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234 input.setAttribute("type", "text");
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235 input.style.width = "10em";
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236 fragment.appendChild(document.createTextNode(msg + ": "));
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237 fragment.appendChild(input);
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238 return fragment;
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239 }
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240
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241 function getInput(cm, msg, f) {
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242 if (cm.openDialog)
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243 cm.openDialog(makePrompt(msg), f, {bottom: true});
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244 else
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245 f(prompt(msg, ""));
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246 }
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247
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248 function operateOnWord(cm, op) {
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249 var start = cm.getCursor(), end = cm.findPosH(start, 1, "word");
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250 cm.replaceRange(op(cm.getRange(start, end)), start, end);
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251 cm.setCursor(end);
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252 }
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253
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254 function toEnclosingExpr(cm) {
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255 var pos = cm.getCursor(), line = pos.line, ch = pos.ch;
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256 var stack = [];
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257 while (line >= cm.firstLine()) {
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258 var text = cm.getLine(line);
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259 for (var i = ch == null ? text.length : ch; i > 0;) {
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260 var ch = text.charAt(--i);
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261 if (ch == ")")
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262 stack.push("(");
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263 else if (ch == "]")
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264 stack.push("[");
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265 else if (ch == "}")
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266 stack.push("{");
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267 else if (/[\(\{\[]/.test(ch) && (!stack.length || stack.pop() != ch))
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268 return cm.extendSelection(Pos(line, i));
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269 }
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270 --line; ch = null;
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271 }
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272 }
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273
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274 // Commands. Names should match emacs function names (albeit in camelCase)
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275 // except where emacs function names collide with code mirror core commands.
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276
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277 cmds.killRegion = function(cm) {
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278 _kill(cm, cm.getCursor("start"), cm.getCursor("end"), true);
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279 };
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280
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281 // Maps to emacs kill-line
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282 cmds.killLineEmacs = repeated(function(cm) {
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283 var start = cm.getCursor(), end = cm.clipPos(Pos(start.line));
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284 var text = cm.getRange(start, end);
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285 if (!/\S/.test(text)) {
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286 text += "\n";
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287 end = Pos(start.line + 1, 0);
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288 }
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289 _kill(cm, start, end, "grow", text);
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290 });
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291
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292 cmds.killRingSave = function(cm) {
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293 addToRing(cm.getSelection());
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294 clearMark(cm);
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295 };
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296
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297 cmds.yank = function(cm) {
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298 var start = cm.getCursor();
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299 cm.replaceRange(getFromRing(getPrefix(cm)), start, start, "paste");
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300 cm.setSelection(start, cm.getCursor());
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301 };
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302
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303 cmds.yankPop = function(cm) {
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304 cm.replaceSelection(popFromRing(), "around", "paste");
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305 };
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306
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307 cmds.forwardChar = move(byChar, 1);
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308
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309 cmds.backwardChar = move(byChar, -1)
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310
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311 cmds.deleteChar = function(cm) { killTo(cm, byChar, 1, false); };
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312
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313 cmds.deleteForwardChar = function(cm) {
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314 _killRegion(cm, false) || killTo(cm, byChar, 1, false);
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315 };
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316
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317 cmds.deleteBackwardChar = function(cm) {
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318 _killRegion(cm, false) || killTo(cm, byChar, -1, false);
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319 };
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320
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321 cmds.forwardWord = move(byWord, 1);
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322
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323 cmds.backwardWord = move(byWord, -1);
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324
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325 cmds.killWord = function(cm) { killTo(cm, byWord, 1, "grow"); };
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326
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327 cmds.backwardKillWord = function(cm) { killTo(cm, byWord, -1, "grow"); };
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328
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329 cmds.nextLine = move(byLine, 1);
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330
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331 cmds.previousLine = move(byLine, -1);
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332
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333 cmds.scrollDownCommand = move(byPage, -1);
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334
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335 cmds.scrollUpCommand = move(byPage, 1);
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336
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337 cmds.backwardParagraph = move(byParagraph, -1);
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338
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339 cmds.forwardParagraph = move(byParagraph, 1);
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340
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341 cmds.backwardSentence = move(bySentence, -1);
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342
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343 cmds.forwardSentence = move(bySentence, 1);
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344
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345 cmds.killSentence = function(cm) { killTo(cm, bySentence, 1, "grow"); };
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346
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347 cmds.backwardKillSentence = function(cm) {
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348 _kill(cm, cm.getCursor(), bySentence(cm, cm.getCursor(), 1), "grow");
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349 };
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350
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351 cmds.killSexp = function(cm) { killTo(cm, byExpr, 1, "grow"); };
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352
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353 cmds.backwardKillSexp = function(cm) { killTo(cm, byExpr, -1, "grow"); };
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354
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355 cmds.forwardSexp = move(byExpr, 1);
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356
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357 cmds.backwardSexp = move(byExpr, -1);
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358
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359 cmds.markSexp = function(cm) {
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360 var cursor = cm.getCursor();
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361 cm.setSelection(findEnd(cm, cursor, byExpr, 1), cursor);
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362 };
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363
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364 cmds.transposeSexps = function(cm) {
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365 var leftStart = byExpr(cm, cm.getCursor(), -1);
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366 var leftEnd = byExpr(cm, leftStart, 1);
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367 var rightEnd = byExpr(cm, leftEnd, 1);
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368 var rightStart = byExpr(cm, rightEnd, -1);
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369 cm.replaceRange(cm.getRange(rightStart, rightEnd) +
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370 cm.getRange(leftEnd, rightStart) +
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371 cm.getRange(leftStart, leftEnd), leftStart, rightEnd);
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372 };
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373
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374 cmds.backwardUpList = repeated(toEnclosingExpr);
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375
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376 cmds.justOneSpace = function(cm) {
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377 var pos = cm.getCursor(), from = pos.ch;
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378 var to = pos.ch, text = cm.getLine(pos.line);
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379 while (from && /\s/.test(text.charAt(from - 1))) --from;
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380 while (to < text.length && /\s/.test(text.charAt(to))) ++to;
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381 cm.replaceRange(" ", Pos(pos.line, from), Pos(pos.line, to));
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382 };
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383
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384 cmds.openLine = repeated(function(cm) {
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385 cm.replaceSelection("\n", "start");
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386 });
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387
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388 // maps to emacs 'transpose-chars'
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389 cmds.transposeCharsRepeatable = repeated(function(cm) {
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390 cm.execCommand("transposeChars");
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391 });
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392
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393 cmds.capitalizeWord = repeated(function(cm) {
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394 operateOnWord(cm, function(w) {
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395 var letter = w.search(/\w/);
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396 if (letter == -1) return w;
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397 return w.slice(0, letter) + w.charAt(letter).toUpperCase() +
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398 w.slice(letter + 1).toLowerCase();
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399 });
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400 });
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401
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402 cmds.upcaseWord = repeated(function(cm) {
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403 operateOnWord(cm, function(w) { return w.toUpperCase(); });
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404 });
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405
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406 cmds.downcaseWord = repeated(function(cm) {
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407 operateOnWord(cm, function(w) { return w.toLowerCase(); });
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408 });
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409
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410 // maps to emacs 'undo'
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411 cmds.undoRepeatable = repeated("undo");
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412
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413 cmds.keyboardQuit = function(cm) {
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414 cm.execCommand("clearSearch");
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415 clearMark(cm);
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416 }
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417
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418 cmds.newline = repeated(function(cm) { cm.replaceSelection("\n", "end"); });
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419
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420 cmds.gotoLine = function(cm) {
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421 var prefix = getPrefix(cm, true);
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422 if (prefix != null && prefix > 0) return cm.setCursor(prefix - 1);
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423
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424 getInput(cm, "Goto line", function(str) {
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425 var num;
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426 if (str && !isNaN(num = Number(str)) && num == (num|0) && num > 0)
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427 cm.setCursor(num - 1);
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428 });
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429 };
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430
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431 cmds.indentRigidly = function(cm) {
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432 cm.indentSelection(getPrefix(cm, true) || cm.getOption("indentUnit"));
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433 };
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434
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435 cmds.exchangePointAndMark = function(cm) {
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436 cm.setSelection(cm.getCursor("head"), cm.getCursor("anchor"));
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437 };
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438
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439 cmds.quotedInsertTab = repeated("insertTab");
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440
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441 cmds.universalArgument = function addPrefixMap(cm) {
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442 cm.state.emacsPrefixMap = true;
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443 cm.addKeyMap(prefixMap);
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444 cm.on("keyHandled", maybeRemovePrefixMap);
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445 cm.on("inputRead", maybeRemovePrefixMap);
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446 };
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447
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448 CodeMirror.emacs = {kill: _kill, killRegion: _killRegion, repeated: repeated};
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449
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450 // Actual keymap
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451 var keyMap = CodeMirror.keyMap.emacs = CodeMirror.normalizeKeyMap({
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452 "Ctrl-W": "killRegion",
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453 "Ctrl-K": "killLineEmacs",
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454 "Alt-W": "killRingSave",
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455 "Ctrl-Y": "yank",
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456 "Alt-Y": "yankPop",
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457 "Ctrl-Space": "setMark",
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458 "Ctrl-Shift-2": "setMark",
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459 "Ctrl-F": "forwardChar",
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460 "Ctrl-B": "backwardChar",
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461 "Right": "forwardChar",
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462 "Left": "backwardChar",
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463 "Ctrl-D": "deleteChar",
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464 "Delete": "deleteForwardChar",
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465 "Ctrl-H": "deleteBackwardChar",
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466 "Backspace": "deleteBackwardChar",
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467 "Alt-F": "forwardWord",
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468 "Alt-B": "backwardWord",
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469 "Alt-Right": "forwardWord",
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470 "Alt-Left": "backwardWord",
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471 "Alt-D": "killWord",
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472 "Alt-Backspace": "backwardKillWord",
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473 "Ctrl-N": "nextLine",
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474 "Ctrl-P": "previousLine",
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475 "Down": "nextLine",
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476 "Up": "previousLine",
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477 "Ctrl-A": "goLineStart",
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478 "Ctrl-E": "goLineEnd",
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479 "End": "goLineEnd",
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480 "Home": "goLineStart",
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481 "Alt-V": "scrollDownCommand",
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482 "Ctrl-V": "scrollUpCommand",
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483 "PageUp": "scrollDownCommand",
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484 "PageDown": "scrollUpCommand",
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485 "Ctrl-Up": "backwardParagraph",
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486 "Ctrl-Down": "forwardParagraph",
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487 "Alt-{": "backwardParagraph",
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488 "Alt-}": "forwardParagraph",
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489 "Alt-A": "backwardSentence",
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490 "Alt-E": "forwardSentence",
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491 "Alt-K": "killSentence",
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492 "Ctrl-X Delete": "backwardKillSentence",
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493 "Ctrl-Alt-K": "killSexp",
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494 "Ctrl-Alt-Backspace": "backwardKillSexp",
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495 "Ctrl-Alt-F": "forwardSexp",
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496 "Ctrl-Alt-B": "backwardSexp",
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497 "Shift-Ctrl-Alt-2": "markSexp",
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498 "Ctrl-Alt-T": "transposeSexps",
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499 "Ctrl-Alt-U": "backwardUpList",
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500 "Alt-Space": "justOneSpace",
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501 "Ctrl-O": "openLine",
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502 "Ctrl-T": "transposeCharsRepeatable",
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503 "Alt-C": "capitalizeWord",
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504 "Alt-U": "upcaseWord",
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505 "Alt-L": "downcaseWord",
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506 "Alt-;": "toggleComment",
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507 "Ctrl-/": "undoRepeatable",
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508 "Shift-Ctrl--": "undoRepeatable",
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509 "Ctrl-Z": "undoRepeatable",
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510 "Cmd-Z": "undoRepeatable",
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511 "Ctrl-X U": "undoRepeatable",
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512 "Shift-Ctrl-Z": "redo",
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513 "Shift-Alt-,": "goDocStart",
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514 "Shift-Alt-.": "goDocEnd",
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515 "Ctrl-S": "findPersistentNext",
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516 "Ctrl-R": "findPersistentPrev",
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517 "Ctrl-G": "keyboardQuit",
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518 "Shift-Alt-5": "replace",
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519 "Alt-/": "autocomplete",
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520 "Enter": "newlineAndIndent",
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521 "Ctrl-J": "newline",
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522 "Tab": "indentAuto",
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523 "Alt-G G": "gotoLine",
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524 "Ctrl-X Tab": "indentRigidly",
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525 "Ctrl-X Ctrl-X": "exchangePointAndMark",
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526 "Ctrl-X Ctrl-S": "save",
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527 "Ctrl-X Ctrl-W": "save",
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528 "Ctrl-X S": "saveAll",
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529 "Ctrl-X F": "open",
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530 "Ctrl-X K": "close",
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531 "Ctrl-X H": "selectAll",
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532 "Ctrl-Q Tab": "quotedInsertTab",
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533 "Ctrl-U": "universalArgument",
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534 "fallthrough": "default"
|
|
|
535 });
|
|
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536
|
|
|
537 var prefixMap = {"Ctrl-G": clearPrefix};
|
|
|
538 function regPrefix(d) {
|
|
|
539 prefixMap[d] = function(cm) { addPrefix(cm, d); };
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|
|
540 keyMap["Ctrl-" + d] = function(cm) { addPrefix(cm, d); };
|
|
|
541 prefixPreservingKeys["Ctrl-" + d] = true;
|
|
|
542 }
|
|
|
543 for (var i = 0; i < 10; ++i) regPrefix(String(i));
|
|
|
544 regPrefix("-");
|
|
|
545 });
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