DevTools: [CodeMirror] roll CodeMirror to version @e20d175

Source/devtools/front_end/cm/comment.js

Index: Source/devtools/front_end/cm/comment.js
diff --git a/Source/devtools/front_end/cm/comment.js b/Source/devtools/front_end/cm/comment.js
index 1eb9a05c5d454d35603968e4b98a3dac17610f28..cb78340231d6a36068f749402eb6b8224a3a4eac 100644
--- a/Source/devtools/front_end/cm/comment.js
+++ b/Source/devtools/front_end/cm/comment.js
@@ -1,3 +1,6 @@
+// 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"));
@@ -150,6 +153,17 @@
         !/comment/.test(self.getTokenTypeAt(Pos(end, close + 1))))
       return false;
 
+    // Avoid killing block comments completely outside the selection.
+    // Positions of the last startString before the start of the selection, and the first endString after it.
+    var lastStart = startLine.lastIndexOf(startString, from.ch);
+    var firstEnd = lastStart == -1 ? -1 : startLine.slice(0, from.ch).indexOf(endString, lastStart + startString.length);
+    if (lastStart != -1 && firstEnd != -1) return false;
+    // Positions of the first endString after the end of the selection, and the last startString before it.
+    firstEnd = endLine.indexOf(endString, to.ch);
+    var almostLastStart = endLine.slice(to.ch).lastIndexOf(startString, firstEnd - to.ch);
+    lastStart = (firstEnd == -1 || almostLastStart == -1) ? -1 : to.ch + almostLastStart;
+    if (firstEnd != -1 && lastStart != -1) return false;
+
     self.operation(function() {
       self.replaceRange("", Pos(end, close - (pad && endLine.slice(close - pad.length, close) == pad ? pad.length : 0)),
                         Pos(end, close + endString.length));