michael@0: (function(mod) {
michael@0:   if (typeof exports == "object" && typeof module == "object") // CommonJS
michael@0:     mod(require("../../lib/codemirror"));
michael@0:   else if (typeof define == "function" && define.amd) // AMD
michael@0:     define(["../../lib/codemirror"], mod);
michael@0:   else // Plain browser env
michael@0:     mod(CodeMirror);
michael@0: })(function(CodeMirror) {
michael@0:   var DEFAULT_BRACKETS = "()[]{}''\"\"";
michael@0:   var DEFAULT_EXPLODE_ON_ENTER = "[]{}";
michael@0:   var SPACE_CHAR_REGEX = /\s/;
michael@0: 
michael@0:   CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
michael@0:     if (old != CodeMirror.Init && old)
michael@0:       cm.removeKeyMap("autoCloseBrackets");
michael@0:     if (!val) return;
michael@0:     var pairs = DEFAULT_BRACKETS, explode = DEFAULT_EXPLODE_ON_ENTER;
michael@0:     if (typeof val == "string") pairs = val;
michael@0:     else if (typeof val == "object") {
michael@0:       if (val.pairs != null) pairs = val.pairs;
michael@0:       if (val.explode != null) explode = val.explode;
michael@0:     }
michael@0:     var map = buildKeymap(pairs);
michael@0:     if (explode) map.Enter = buildExplodeHandler(explode);
michael@0:     cm.addKeyMap(map);
michael@0:   });
michael@0: 
michael@0:   function charsAround(cm, pos) {
michael@0:     var str = cm.getRange(CodeMirror.Pos(pos.line, pos.ch - 1),
michael@0:                           CodeMirror.Pos(pos.line, pos.ch + 1));
michael@0:     return str.length == 2 ? str : null;
michael@0:   }
michael@0: 
michael@0:   function buildKeymap(pairs) {
michael@0:     var map = {
michael@0:       name : "autoCloseBrackets",
michael@0:       Backspace: function(cm) {
michael@0:         if (cm.getOption("disableInput")) return CodeMirror.Pass;
michael@0:         var ranges = cm.listSelections();
michael@0:         for (var i = 0; i < ranges.length; i++) {
michael@0:           if (!ranges[i].empty()) return CodeMirror.Pass;
michael@0:           var around = charsAround(cm, ranges[i].head);
michael@0:           if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
michael@0:         }
michael@0:         for (var i = ranges.length - 1; i >= 0; i--) {
michael@0:           var cur = ranges[i].head;
michael@0:           cm.replaceRange("", CodeMirror.Pos(cur.line, cur.ch - 1), CodeMirror.Pos(cur.line, cur.ch + 1));
michael@0:         }
michael@0:       }
michael@0:     };
michael@0:     var closingBrackets = "";
michael@0:     for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
michael@0:       if (left != right) closingBrackets += right;
michael@0:       map["'" + left + "'"] = function(cm) {
michael@0:         if (cm.getOption("disableInput")) return CodeMirror.Pass;
michael@0:         var ranges = cm.listSelections(), type, next;
michael@0:         for (var i = 0; i < ranges.length; i++) {
michael@0:           var range = ranges[i], cur = range.head, curType;
michael@0:           if (left == "'" && cm.getTokenTypeAt(cur) == "comment")
michael@0:             return CodeMirror.Pass;
michael@0:           var next = cm.getRange(cur, CodeMirror.Pos(cur.line, cur.ch + 1));
michael@0:           if (!range.empty())
michael@0:             curType = "surround";
michael@0:           else if (left == right && next == right)
michael@0:             curType = "skip";
michael@0:           else if (left == right && CodeMirror.isWordChar(next))
michael@0:             return CodeMirror.Pass;
michael@0:           else if (cm.getLine(cur.line).length == cur.ch || closingBrackets.indexOf(next) >= 0 || SPACE_CHAR_REGEX.test(next))
michael@0:             curType = "both";
michael@0:           else
michael@0:             return CodeMirror.Pass;
michael@0:           if (!type) type = curType;
michael@0:           else if (type != curType) return CodeMirror.Pass;
michael@0:         }
michael@0: 
michael@0:         if (type == "skip") {
michael@0:           cm.execCommand("goCharRight");
michael@0:         } else if (type == "surround") {
michael@0:           var sels = cm.getSelections();
michael@0:           for (var i = 0; i < sels.length; i++)
michael@0:             sels[i] = left + sels[i] + right;
michael@0:           cm.replaceSelections(sels, "around");
michael@0:         } else if (type == "both") {
michael@0:           cm.replaceSelection(left + right, null);
michael@0:           cm.execCommand("goCharLeft");
michael@0:         }
michael@0:       };
michael@0:       if (left != right) map["'" + right + "'"] = function(cm) {
michael@0:         var ranges = cm.listSelections();
michael@0:         for (var i = 0; i < ranges.length; i++) {
michael@0:           var range = ranges[i];
michael@0:           if (!range.empty() ||
michael@0:               cm.getRange(range.head, CodeMirror.Pos(range.head.line, range.head.ch + 1)) != right)
michael@0:             return CodeMirror.Pass;
michael@0:         }
michael@0:         cm.execCommand("goCharRight");
michael@0:       };
michael@0:     })(pairs.charAt(i), pairs.charAt(i + 1));
michael@0:     return map;
michael@0:   }
michael@0: 
michael@0:   function buildExplodeHandler(pairs) {
michael@0:     return function(cm) {
michael@0:       if (cm.getOption("disableInput")) return CodeMirror.Pass;
michael@0:       var ranges = cm.listSelections();
michael@0:       for (var i = 0; i < ranges.length; i++) {
michael@0:         if (!ranges[i].empty()) return CodeMirror.Pass;
michael@0:         var around = charsAround(cm, ranges[i].head);
michael@0:         if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
michael@0:       }
michael@0:       cm.operation(function() {
michael@0:         cm.replaceSelection("\n\n", null);
michael@0:         cm.execCommand("goCharLeft");
michael@0:         ranges = cm.listSelections();
michael@0:         for (var i = 0; i < ranges.length; i++) {
michael@0:           var line = ranges[i].head.line;
michael@0:           cm.indentLine(line, null, true);
michael@0:           cm.indentLine(line + 1, null, true);
michael@0:         }
michael@0:       });
michael@0:     };
michael@0:   }
michael@0: });