DevTools: roll CodeMirror

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

 // CodeMirror, copyright (c) by Marijn Haverbeke and others
 // Distributed under an MIT license: http://codemirror.net/LICENSE
 
 (function(mod) {
   if (typeof exports == "object" && typeof module == "object") // CommonJS
     mod(require("../../lib/codemirror"));
   else if (typeof define == "function" && define.amd) // AMD
     define(["../../lib/codemirror"], mod);
   else // Plain browser env
     mod(CodeMirror);
 })(function(CodeMirror) {
-  var DEFAULT_BRACKETS = "()[]{}''\"\"";
-  var DEFAULT_EXPLODE_ON_ENTER = "[]{}";
-  var SPACE_CHAR_REGEX = /\s/;
+  var defaults = {
+    pairs: "()[]{}''\"\"",
+    triples: "",
+    explode: "[]{}"
+  };
 
   var Pos = CodeMirror.Pos;
 
   CodeMirror.defineOption("autoCloseBrackets", false, function(cm, val, old) {
-    if (old != CodeMirror.Init && old)
-      cm.removeKeyMap("autoCloseBrackets");
-    if (!val) return;
-    var pairs = DEFAULT_BRACKETS, explode = DEFAULT_EXPLODE_ON_ENTER;
-    if (typeof val == "string") pairs = val;
-    else if (typeof val == "object") {
-      if (val.pairs != null) pairs = val.pairs;
-      if (val.explode != null) explode = val.explode;
+    if (old && old != CodeMirror.Init) {
+      cm.removeKeyMap(keyMap);
+      cm.state.closeBrackets = null;
     }
-    var map = buildKeymap(pairs);
-    if (explode) map.Enter = buildExplodeHandler(explode);
-    cm.addKeyMap(map);
+    if (val) {
+      cm.state.closeBrackets = val;
+      cm.addKeyMap(keyMap);
+    }
   });
 
+  function getOption(conf, name) {
+    if (name == "pairs" && typeof conf == "string") return conf;
+    if (typeof conf == "object" && conf[name] != null) return conf[name];
+    return defaults[name];
+  }
+
+  var bind = defaults.pairs + "`";
+  var keyMap = {Backspace: handleBackspace, Enter: handleEnter};
+  for (var i = 0; i < bind.length; i++)
+    keyMap["'" + bind.charAt(i) + "'"] = handler(bind.charAt(i));
+
+  function handler(ch) {
+    return function(cm) { return handleChar(cm, ch); };
+  }
+
+  function getConfig(cm) {
+    var deflt = cm.state.closeBrackets;
+    if (!deflt) return null;
+    var mode = cm.getModeAt(cm.getCursor());
+    return mode.closeBrackets || deflt;
+  }
+
+  function handleBackspace(cm) {
+    var conf = getConfig(cm);
+    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
+
+    var pairs = getOption(conf, "pairs");
+    var ranges = cm.listSelections();
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) return CodeMirror.Pass;
+      var around = charsAround(cm, ranges[i].head);
+      if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
+    }
+    for (var i = ranges.length - 1; i >= 0; i--) {
+      var cur = ranges[i].head;
+      cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
+    }
+  }
+
+  function handleEnter(cm) {
+    var conf = getConfig(cm);
+    var explode = conf && getOption(conf, "explode");
+    if (!explode || cm.getOption("disableInput")) return CodeMirror.Pass;
+
+    var ranges = cm.listSelections();
+    for (var i = 0; i < ranges.length; i++) {
+      if (!ranges[i].empty()) return CodeMirror.Pass;
+      var around = charsAround(cm, ranges[i].head);
+      if (!around || explode.indexOf(around) % 2 != 0) return CodeMirror.Pass;
+    }
+    cm.operation(function() {
+      cm.replaceSelection("\n\n", null);
+      cm.execCommand("goCharLeft");
+      ranges = cm.listSelections();
+      for (var i = 0; i < ranges.length; i++) {
+        var line = ranges[i].head.line;
+        cm.indentLine(line, null, true);
+        cm.indentLine(line + 1, null, true);
+      }
+    });
+  }
+
+  function contractSelection(sel) {
+    var inverted = CodeMirror.cmpPos(sel.anchor, sel.head) > 0;
+    return {anchor: new Pos(sel.anchor.line, sel.anchor.ch + (inverted ? -1 : 1)),
+            head: new Pos(sel.head.line, sel.head.ch + (inverted ? 1 : -1))};
+  }
+
+  function handleChar(cm, ch) {
+    var conf = getConfig(cm);
+    if (!conf || cm.getOption("disableInput")) return CodeMirror.Pass;
+
+    var pairs = getOption(conf, "pairs");
+    var pos = pairs.indexOf(ch);
+    if (pos == -1) return CodeMirror.Pass;
+    var triples = getOption(conf, "triples");
+
+    var identical = pairs.charAt(pos + 1) == ch;
+    var ranges = cm.listSelections();
+    var opening = pos % 2 == 0;
+
+    var type;
+    for (var i = 0; i < ranges.length; i++) {
+      var range = ranges[i], cur = range.head, curType;
+      var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
+      if (opening && !range.empty()) {
+        curType = "surround";
+      } else if ((identical || !opening) && next == ch) {
+        if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
+          curType = "skipThree";
+        else
+          curType = "skip";
+      } else if (identical && cur.ch > 1 && triples.indexOf(ch) >= 0 &&
+                 cm.getRange(Pos(cur.line, cur.ch - 2), cur) == ch + ch &&
+                 (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != ch)) {
+        curType = "addFour";
+      } else if (identical) {
+        if (!CodeMirror.isWordChar(next) && enteringString(cm, cur, ch)) curType = "both";
+        else return CodeMirror.Pass;
+      } else if (opening && (cm.getLine(cur.line).length == cur.ch ||
+                             isClosingBracket(next, pairs) ||
+                             /\s/.test(next))) {
+        curType = "both";
+      } else {
+        return CodeMirror.Pass;
+      }
+      if (!type) type = curType;
+      else if (type != curType) return CodeMirror.Pass;
+    }
+
+    var left = pos % 2 ? pairs.charAt(pos - 1) : ch;
+    var right = pos % 2 ? ch : pairs.charAt(pos + 1);
+    cm.operation(function() {
+      if (type == "skip") {
+        cm.execCommand("goCharRight");
+      } else if (type == "skipThree") {
+        for (var i = 0; i < 3; i++)
+          cm.execCommand("goCharRight");
+      } else if (type == "surround") {
+        var sels = cm.getSelections();
+        for (var i = 0; i < sels.length; i++)
+          sels[i] = left + sels[i] + right;
+        cm.replaceSelections(sels, "around");
+        sels = cm.listSelections().slice();
+        for (var i = 0; i < sels.length; i++)
+          sels[i] = contractSelection(sels[i]);
+        cm.setSelections(sels);
+      } else if (type == "both") {
+        cm.replaceSelection(left + right, null);
+        cm.triggerElectric(left + right);
+        cm.execCommand("goCharLeft");
+      } else if (type == "addFour") {
+        cm.replaceSelection(left + left + left + left, "before");
+        cm.execCommand("goCharRight");
+      }
+    });
+  }
+
+  function isClosingBracket(ch, pairs) {
+    var pos = pairs.lastIndexOf(ch);
+    return pos > -1 && pos % 2 == 1;
+  }
+
   function charsAround(cm, pos) {
     var str = cm.getRange(Pos(pos.line, pos.ch - 1),
                           Pos(pos.line, pos.ch + 1));
     return str.length == 2 ? str : null;
   }
 
-  function buildKeymap(pairs) {
-    var map = {
-      name : "autoCloseBrackets",
-      Backspace: function(cm) {
-        if (cm.getOption("disableInput")) return CodeMirror.Pass;
-        var ranges = cm.listSelections();
-        for (var i = 0; i < ranges.length; i++) {
-          if (!ranges[i].empty()) return CodeMirror.Pass;
-          var around = charsAround(cm, ranges[i].head);
-          if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
-        }
-        for (var i = ranges.length - 1; i >= 0; i--) {
-          var cur = ranges[i].head;
-          cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
-        }
-      }
-    };
-    var closingBrackets = "";
-    for (var i = 0; i < pairs.length; i += 2) (function(left, right) {
-      if (left != right) closingBrackets += right;
-      map["'" + left + "'"] = function(cm) {
-        if (cm.getOption("disableInput")) return CodeMirror.Pass;
-        var ranges = cm.listSelections(), type, next;
-        for (var i = 0; i < ranges.length; i++) {
-          var range = ranges[i], cur = range.head, curType;
-          if (left == "'" && cm.getTokenTypeAt(cur) == "comment")
-            return CodeMirror.Pass;
-          var next = cm.getRange(cur, Pos(cur.line, cur.ch + 1));
-          if (!range.empty())
-            curType = "surround";
-          else if (left == right && next == right) {
-            if (cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == left + left + left)
-              curType = "skipThree";
-            else
-              curType = "skip";
-          } else if (left == right && cur.ch > 1 &&
-                     cm.getRange(Pos(cur.line, cur.ch - 2), cur) == left + left &&
-                     (cur.ch <= 2 || cm.getRange(Pos(cur.line, cur.ch - 3), Pos(cur.line, cur.ch - 2)) != left))
-            curType = "addFour";
-          else if (left == right && CodeMirror.isWordChar(next))
-            return CodeMirror.Pass;
-          else if (cm.getLine(cur.line).length == cur.ch || closingBrackets.indexOf(next) >= 0 || SPACE_CHAR_REGEX.test(next))
-            curType = "both";
-          else
-            return CodeMirror.Pass;
-          if (!type) type = curType;
-          else if (type != curType) return CodeMirror.Pass;
-        }
-
-        cm.operation(function() {
-          if (type == "skip") {
-            cm.execCommand("goCharRight");
-          } else if (type == "skipThree") {
-            for (var i = 0; i < 3; i++)
-              cm.execCommand("goCharRight");
-          } else if (type == "surround") {
-            var sels = cm.getSelections();
-            for (var i = 0; i < sels.length; i++)
-              sels[i] = left + sels[i] + right;
-            cm.replaceSelections(sels, "around");
-          } else if (type == "both") {
-            cm.replaceSelection(left + right, null);
-            cm.execCommand("goCharLeft");
-          } else if (type == "addFour") {
-            cm.replaceSelection(left + left + left + left, "before");
-            cm.execCommand("goCharRight");
-          }
-        });
-      };
-      if (left != right) map["'" + right + "'"] = function(cm) {
-        var ranges = cm.listSelections();
-        for (var i = 0; i < ranges.length; i++) {
-          var range = ranges[i];
-          if (!range.empty() ||
-              cm.getRange(range.head, Pos(range.head.line, range.head.ch + 1)) != right)
-            return CodeMirror.Pass;
-        }
-        cm.execCommand("goCharRight");
-      };
-    })(pairs.charAt(i), pairs.charAt(i + 1));
-    return map;
+  // Project the token type that will exists after the given char is
+  // typed, and use it to determine whether it would cause the start
+  // of a string token.
+  function enteringString(cm, pos, ch) {
+    var line = cm.getLine(pos.line);
+    var token = cm.getTokenAt(pos);
+    if (/\bstring2?\b/.test(token.type)) return false;
+    var stream = new CodeMirror.StringStream(line.slice(0, pos.ch) + ch + line.slice(pos.ch), 4);
+    stream.pos = stream.start = token.start;
+    for (;;) {
+      var type1 = cm.getMode().token(stream, token.state);
+      if (stream.pos >= pos.ch + 1) return /\bstring2?\b/.test(type1);
+      stream.start = stream.pos;
+    }
   }
-
-  function buildExplodeHandler(pairs) {
-    return function(cm) {
-      if (cm.getOption("disableInput")) return CodeMirror.Pass;
-      var ranges = cm.listSelections();
-      for (var i = 0; i < ranges.length; i++) {
-        if (!ranges[i].empty()) return CodeMirror.Pass;
-        var around = charsAround(cm, ranges[i].head);
-        if (!around || pairs.indexOf(around) % 2 != 0) return CodeMirror.Pass;
-      }
-      cm.operation(function() {
-        cm.replaceSelection("\n\n", null);
-        cm.execCommand("goCharLeft");
-        ranges = cm.listSelections();
-        for (var i = 0; i < ranges.length; i++) {
-          var line = ranges[i].head.line;
-          cm.indentLine(line, null, true);
-          cm.indentLine(line + 1, null, true);
-        }
-      });
-    };
-  }
-});
+});