1 files changed, 78 insertions, 0 deletions
diff --git a/devtools/client/shared/sourceeditor/codemirror/addon/comment/continuecomment.js b/devtools/client/shared/sourceeditor/codemirror/addon/comment/continuecomment.js
new file mode 100644
index 0000000000..2dda5e5d92
--- /dev/null
+++ b/devtools/client/shared/sourceeditor/codemirror/addon/comment/continuecomment.js
@@ -0,0 +1,78 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("resource://devtools/client/shared/sourceeditor/codemirror/lib/codemirror.js"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  function continueComment(cm) {
+    if (cm.getOption("disableInput")) return CodeMirror.Pass;
+    var ranges = cm.listSelections(), mode, inserts = [];
+    for (var i = 0; i < ranges.length; i++) {
+      var pos = ranges[i].head
+      if (!/\bcomment\b/.test(cm.getTokenTypeAt(pos))) return CodeMirror.Pass;
+      var modeHere = cm.getModeAt(pos)
+      if (!mode) mode = modeHere;
+      else if (mode != modeHere) return CodeMirror.Pass;
+
+      var insert = null;
+      if (mode.blockCommentStart && mode.blockCommentContinue) {
+        var line = cm.getLine(pos.line).slice(0, pos.ch)
+        var end = line.lastIndexOf(mode.blockCommentEnd), found
+        if (end != -1 && end == pos.ch - mode.blockCommentEnd.length) {
+          // Comment ended, don't continue it
+        } else if ((found = line.lastIndexOf(mode.blockCommentStart)) > -1 && found > end) {
+          insert = line.slice(0, found)
+          if (/\S/.test(insert)) {
+            insert = ""
+            for (var j = 0; j < found; ++j) insert += " "
+          }
+        } else if ((found = line.indexOf(mode.blockCommentContinue)) > -1 && !/\S/.test(line.slice(0, found))) {
+          insert = line.slice(0, found)
+        }
+        if (insert != null) insert += mode.blockCommentContinue
+      }
+      if (insert == null && mode.lineComment && continueLineCommentEnabled(cm)) {
+        var line = cm.getLine(pos.line), found = line.indexOf(mode.lineComment);
+        if (found > -1) {
+          insert = line.slice(0, found);
+          if (/\S/.test(insert)) insert = null;
+          else insert += mode.lineComment + line.slice(found + mode.lineComment.length).match(/^\s*/)[0];
+        }
+      }
+      if (insert == null) return CodeMirror.Pass;
+      inserts[i] = "\n" + insert;
+    }
+
+    cm.operation(function() {
+      for (var i = ranges.length - 1; i >= 0; i--)
+        cm.replaceRange(inserts[i], ranges[i].from(), ranges[i].to(), "+insert");
+    });
+  }
+
+  function continueLineCommentEnabled(cm) {
+    var opt = cm.getOption("continueComments");
+    if (opt && typeof opt == "object")
+      return opt.continueLineComment !== false;
+    return true;
+  }
+
+  CodeMirror.defineOption("continueComments", null, function(cm, val, prev) {
+    if (prev && prev != CodeMirror.Init)
+      cm.removeKeyMap("continueComment");
+    if (val) {
+      var key = "Enter";
+      if (typeof val == "string")
+        key = val;
+      else if (typeof val == "object" && val.key)
+        key = val.key;
+      var map = {name: "continueComment"};
+      map[key] = continueComment;
+      cm.addKeyMap(map);
+    }
+  });
+});