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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 var defaults = {
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13 pairs: "()[]{}''\"\"",
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14 closeBefore: ")]}'\":;>",
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15 triples: "",
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16 explode: "[]{}"
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17 };
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18
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19 var Pos = CodeMirror.Pos;
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20
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21 CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
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22 if (old && old != CodeMirror.Init) {
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23 cm.removeKeyMap(keyMap);
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24 cm.state.closeBrackets = null;
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25 }
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26 if (val) {
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27 ensureBound(getOption(val, "pairs"))
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28 cm.state.closeBrackets = val;
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29 cm.addKeyMap(keyMap);
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30 }
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31 });
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32
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33 function getOption(conf, name) {
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34 if (name == "pairs" && typeof conf == "string") return conf;
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35 if (typeof conf == "object" && conf[name] != null) return conf[name];
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36 return defaults[name];
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37 }
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38
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39 var keyMap = {Backspace: handleBackspace, Enter: handleEnter};
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40 function ensureBound(chars) {
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41 for (var i = 0; i < chars.length; i++) {
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42 var ch = chars.charAt(i), key = "'" + ch + "'"
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43 if (!keyMap[key]) keyMap[key] = handler(ch)
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44 }
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45 }
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46 ensureBound(defaults.pairs + "`")
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47
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48 function handler(ch) {
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49 return function(cm) { return handleChar(cm, ch); };
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50 }
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51
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52 function getConfig(cm) {
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53 var deflt = cm.state.closeBrackets;
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54 if (!deflt || deflt.override) return deflt;
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55 var mode = cm.getModeAt(cm.getCursor());
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56 return mode.closeBrackets || deflt;
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57 }
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58
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59 function handleBackspace(cm) {
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60 var conf = getConfig(cm);
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61 if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
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62
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63 var pairs = getOption(conf, "pairs");
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64 var ranges = cm.listSelections();
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65 for (var i = 0; i < ranges.length; i++) {
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66 if (!ranges[i].empty()) return CodeMirror.Pass;
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67 var around = charsAround(cm, ranges[i].head);
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68 if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
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69 }
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70 for (var i = ranges.length - 1; i >= 0; i--) {
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71 var cur = ranges[i].head;
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72 cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
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73 }
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74 }
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75
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76 function handleEnter(cm) {
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77 var conf = getConfig(cm);
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78 var explode = conf && getOption(conf, "explode");
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79 if (!explode || cm.getOption("disableInput")) return CodeMirror.Pass;
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80
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81 var ranges = cm.listSelections();
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82 for (var i = 0; i < ranges.length; i++) {
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83 if (!ranges[i].empty()) return CodeMirror.Pass;
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84 var around = charsAround(cm, ranges[i].head);
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85 if (!around || explode.indexOf(around) % 2 != 0) return CodeMirror.Pass;
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86 }
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87 cm.operation(function() {
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88 var linesep = cm.lineSeparator() || "\n";
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89 cm.replaceSelection(linesep + linesep, null);
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90 moveSel(cm, -1)
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91 ranges = cm.listSelections();
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92 for (var i = 0; i < ranges.length; i++) {
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93 var line = ranges[i].head.line;
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94 cm.indentLine(line, null, true);
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95 cm.indentLine(line + 1, null, true);
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96 }
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97 });
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98 }
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99
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100 function moveSel(cm, dir) {
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101 var newRanges = [], ranges = cm.listSelections(), primary = 0
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102 for (var i = 0; i < ranges.length; i++) {
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103 var range = ranges[i]
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104 if (range.head == cm.getCursor()) primary = i
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105 var pos = range.head.ch || dir > 0 ? {line: range.head.line, ch: range.head.ch + dir} : {line: range.head.line - 1}
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106 newRanges.push({anchor: pos, head: pos})
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107 }
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108 cm.setSelections(newRanges, primary)
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109 }
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110
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111 function contractSelection(sel) {
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112 var inverted = CodeMirror.cmpPos(sel.anchor, sel.head) > 0;
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113 return {anchor: new Pos(sel.anchor.line, sel.anchor.ch + (inverted ? -1 : 1)),
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114 head: new Pos(sel.head.line, sel.head.ch + (inverted ? 1 : -1))};
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115 }
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116
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117 function handleChar(cm, ch) {
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118 var conf = getConfig(cm);
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119 if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
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120
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121 var pairs = getOption(conf, "pairs");
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122 var pos = pairs.indexOf(ch);
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123 if (pos == -1) return CodeMirror.Pass;
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124
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125 var closeBefore = getOption(conf,"closeBefore");
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126
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127 var triples = getOption(conf, "triples");
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128
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129 var identical = pairs.charAt(pos + 1) == ch;
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130 var ranges = cm.listSelections();
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131 var opening = pos % 2 == 0;
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132
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133 var type;
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134 for (var i = 0; i < ranges.length; i++) {
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135 var range = ranges[i], cur = range.head, curType;
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136 var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
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137 if (opening && !range.empty()) {
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138 curType = "surround";
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139 } else if ((identical || !opening) && next == ch) {
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140 if (identical && stringStartsAfter(cm, cur))
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141 curType = "both";
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142 else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
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143 curType = "skipThree";
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144 else
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145 curType = "skip";
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146 } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
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147 cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch) {
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148 if (cur.ch > 2 && /\bstring/.test(cm.getTokenTypeAt(Pos(cur.line, cur.ch - 2)))) return CodeMirror.Pass;
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149 curType = "addFour";
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150 } else if (identical) {
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151 var prev = cur.ch == 0 ? " " : cm.getRange(Pos(cur.line, cur.ch - 1), cur)
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152 if (!CodeMirror.isWordChar(next) && prev != ch && !CodeMirror.isWordChar(prev)) curType = "both";
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153 else return CodeMirror.Pass;
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154 } else if (opening && (next.length === 0 || /\s/.test(next) || closeBefore.indexOf(next) > -1)) {
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155 curType = "both";
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156 } else {
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157 return CodeMirror.Pass;
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158 }
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159 if (!type) type = curType;
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160 else if (type != curType) return CodeMirror.Pass;
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161 }
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162
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163 var left = pos % 2 ? pairs.charAt(pos - 1) : ch;
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164 var right = pos % 2 ? ch : pairs.charAt(pos + 1);
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165 cm.operation(function() {
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166 if (type == "skip") {
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167 moveSel(cm, 1)
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168 } else if (type == "skipThree") {
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169 moveSel(cm, 3)
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170 } else if (type == "surround") {
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171 var sels = cm.getSelections();
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172 for (var i = 0; i < sels.length; i++)
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173 sels[i] = left + sels[i] + right;
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174 cm.replaceSelections(sels, "around");
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175 sels = cm.listSelections().slice();
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176 for (var i = 0; i < sels.length; i++)
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177 sels[i] = contractSelection(sels[i]);
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178 cm.setSelections(sels);
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179 } else if (type == "both") {
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180 cm.replaceSelection(left + right, null);
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181 cm.triggerElectric(left + right);
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182 moveSel(cm, -1)
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183 } else if (type == "addFour") {
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184 cm.replaceSelection(left + left + left + left, "before");
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185 moveSel(cm, 1)
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186 }
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187 });
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188 }
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189
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190 function charsAround(cm, pos) {
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191 var str = cm.getRange(Pos(pos.line, pos.ch - 1),
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192 Pos(pos.line, pos.ch + 1));
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193 return str.length == 2 ? str : null;
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194 }
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195
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196 function stringStartsAfter(cm, pos) {
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197 var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
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198 return /\bstring/.test(token.type) && token.start == pos.ch &&
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199 (pos.ch == 0 || !/\bstring/.test(cm.getTokenTypeAt(pos)))
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200 }
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201 });
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