third_party/WebKit/Source/devtools/front_end/cm/closebrackets.js

   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 });