53 lines
2.1 KiB
JavaScript
53 lines
2.1 KiB
JavaScript
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(function() {
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var DEFAULT_BRACKETS = "()[]{}''\"\"";
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var SPACE_CHAR_REGEX = /\s/;
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CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
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var wasOn = old && old != CodeMirror.Init;
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if (val && !wasOn)
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cm.addKeyMap(buildKeymap(typeof val == "string" ? val : DEFAULT_BRACKETS));
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else if (!val && wasOn)
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cm.removeKeyMap("autoCloseBrackets");
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});
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function buildKeymap(pairs) {
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var map = {
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name : "autoCloseBrackets",
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Backspace: function(cm) {
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if (cm.somethingSelected()) return CodeMirror.Pass;
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var cur = cm.getCursor(), line = cm.getLine(cur.line);
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if (cur.ch && cur.ch < line.length &&
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pairs.indexOf(line.slice(cur.ch - 1, cur.ch + 1)) % 2 == 0)
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cm.replaceRange("", CodeMirror.Pos(cur.line, cur.ch - 1), CodeMirror.Pos(cur.line, cur.ch + 1));
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else
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return CodeMirror.Pass;
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}
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};
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var closingBrackets = [];
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for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
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if (left != right) closingBrackets.push(right);
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function surround(cm) {
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var selection = cm.getSelection();
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cm.replaceSelection(left + selection + right);
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}
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function maybeOverwrite(cm) {
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var cur = cm.getCursor(), ahead = cm.getRange(cur, CodeMirror.Pos(cur.line, cur.ch + 1));
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if (ahead != right || cm.somethingSelected()) return CodeMirror.Pass;
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else cm.execCommand("goCharRight");
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}
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map["'" + left + "'"] = function(cm) {
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if (cm.somethingSelected()) return surround(cm);
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if (left == right && maybeOverwrite(cm) != CodeMirror.Pass) return;
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var cur = cm.getCursor(), ahead = CodeMirror.Pos(cur.line, cur.ch + 1);
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var line = cm.getLine(cur.line), nextChar = line.charAt(cur.ch);
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if (line.length == cur.ch || closingBrackets.indexOf(nextChar) >= 0 || SPACE_CHAR_REGEX.test(nextChar))
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cm.replaceSelection(left + right, {head: ahead, anchor: ahead});
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else
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return CodeMirror.Pass;
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};
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if (left != right) map["'" + right + "'"] = maybeOverwrite;
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})(pairs.charAt(i), pairs.charAt(i + 1));
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return map;
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}
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})();
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