1// CodeMirror, copyright (c) by Marijn Haverbeke and others
2// Distributed under an MIT license: http://codemirror.net/LICENSE
3
4(function(mod) {
5  if (typeof exports == "object" && typeof module == "object") // CommonJS
6    mod(require("../../lib/codemirror"));
7  else if (typeof define == "function" && define.amd) // AMD
8    define(["../../lib/codemirror"], mod);
9  else // Plain browser env
10    mod(CodeMirror);
11})(function(CodeMirror) {
12  var DEFAULT_BRACKETS = "()[]{}''\"\"";
13  var DEFAULT_EXPLODE_ON_ENTER = "[]{}";
14  var SPACE_CHAR_REGEX = /\s/;
15
16  var Pos = CodeMirror.Pos;
17
18  CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
19    if (old != CodeMirror.Init && old)
20      cm.removeKeyMap("autoCloseBrackets");
21    if (!val) return;
22    var pairs = DEFAULT_BRACKETS, explode = DEFAULT_EXPLODE_ON_ENTER;
23    if (typeof val == "string") pairs = val;
24    else if (typeof val == "object") {
25      if (val.pairs != null) pairs = val.pairs;
26      if (val.explode != null) explode = val.explode;
27    }
28    var map = buildKeymap(pairs);
29    if (explode) map.Enter = buildExplodeHandler(explode);
30    cm.addKeyMap(map);
31  });
32
33  function charsAround(cm, pos) {
34    var str = cm.getRange(Pos(pos.line, pos.ch - 1),
35                          Pos(pos.line, pos.ch + 1));
36    return str.length == 2 ? str : null;
37  }
38
39  function buildKeymap(pairs) {
40    var map = {
41      name : "autoCloseBrackets",
42      Backspace: function(cm) {
43        if (cm.getOption("disableInput")) return CodeMirror.Pass;
44        var ranges = cm.listSelections();
45        for (var i = 0; i < ranges.length; i++) {
46          if (!ranges[i].empty()) return CodeMirror.Pass;
47          var around = charsAround(cm, ranges[i].head);
48          if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
49        }
50        for (var i = ranges.length - 1; i >= 0; i--) {
51          var cur = ranges[i].head;
52          cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
53        }
54      }
55    };
56    var closingBrackets = "";
57    for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
58      if (left != right) closingBrackets += right;
59      map["'" + left + "'"] = function(cm) {
60        if (cm.getOption("disableInput")) return CodeMirror.Pass;
61        var ranges = cm.listSelections(), type, next;
62        for (var i = 0; i < ranges.length; i++) {
63          var range = ranges[i], cur = range.head, curType;
64          if (left == "'" && cm.getTokenTypeAt(cur) == "comment")
65            return CodeMirror.Pass;
66          var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
67          if (!range.empty())
68            curType = "surround";
69          else if (left == right && next == right) {
70            if (cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == left + left + left)
71              curType = "skipThree";
72            else
73              curType = "skip";
74          } else if (left == right && cur.ch > 1 &&
75                     cm.getRange(Pos(cur.line, cur.ch - 2), cur) == left + left &&
76                     (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != left))
77            curType = "addFour";
78          else if (left == right && CodeMirror.isWordChar(next))
79            return CodeMirror.Pass;
80          else if (cm.getLine(cur.line).length == cur.ch || closingBrackets.indexOf(next) >= 0 || SPACE_CHAR_REGEX.test(next))
81            curType = "both";
82          else
83            return CodeMirror.Pass;
84          if (!type) type = curType;
85          else if (type != curType) return CodeMirror.Pass;
86        }
87
88        cm.operation(function() {
89          if (type == "skip") {
90            cm.execCommand("goCharRight");
91          } else if (type == "skipThree") {
92            for (var i = 0; i < 3; i++)
93              cm.execCommand("goCharRight");
94          } else if (type == "surround") {
95            var sels = cm.getSelections();
96            for (var i = 0; i < sels.length; i++)
97              sels[i] = left + sels[i] + right;
98            cm.replaceSelections(sels, "around");
99          } else if (type == "both") {
100            cm.replaceSelection(left + right, null);
101            cm.execCommand("goCharLeft");
102          } else if (type == "addFour") {
103            cm.replaceSelection(left + left + left + left, "before");
104            cm.execCommand("goCharRight");
105          }
106        });
107      };
108      if (left != right) map["'" + right + "'"] = function(cm) {
109        var ranges = cm.listSelections();
110        for (var i = 0; i < ranges.length; i++) {
111          var range = ranges[i];
112          if (!range.empty() ||
113              cm.getRange(range.head, Pos(range.head.line, range.head.ch + 1)) != right)
114            return CodeMirror.Pass;
115        }
116        cm.execCommand("goCharRight");
117      };
118    })(pairs.charAt(i), pairs.charAt(i + 1));
119    return map;
120  }
121
122  function buildExplodeHandler(pairs) {
123    return function(cm) {
124      if (cm.getOption("disableInput")) return CodeMirror.Pass;
125      var ranges = cm.listSelections();
126      for (var i = 0; i < ranges.length; i++) {
127        if (!ranges[i].empty()) return CodeMirror.Pass;
128        var around = charsAround(cm, ranges[i].head);
129        if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
130      }
131      cm.operation(function() {
132        cm.replaceSelection("\n\n", null);
133        cm.execCommand("goCharLeft");
134        ranges = cm.listSelections();
135        for (var i = 0; i < ranges.length; i++) {
136          var line = ranges[i].head.line;
137          cm.indentLine(line, null, true);
138          cm.indentLine(line + 1, null, true);
139        }
140      });
141    };
142  }
143});
144