[comment & continuecomment addons] Make multi-selection aware

Issue #778

addon/comment/comment.js

@@ -11,8 +11,21 @@
   }
 
   CodeMirror.commands.toggleComment = function(cm) {
-    var from = cm.getCursor("start"), to = cm.getCursor("end");
-    cm.uncomment(from, to) || cm.lineComment(from, to);
+    var minLine = Infinity, ranges = cm.listSelections(), mode = null;
+    for (var i = ranges.length - 1; i >= 0; i--) {
+      var from = ranges[i].from(), to = ranges[i].to();
+      if (from.line >= minLine) continue;
+      if (to.line >= minLine) to = Pos(minLine, 0);
+      minLine = from.line;
+      if (mode == null) {
+        if (cm.uncomment(from, to)) mode = "un";
+        else { cm.lineComment(from, to); mode = "line"; }
+      } else if (mode == "un") {
+        cm.uncomment(from, to);
+      } else {
+        cm.lineComment(from, to);
+      }
+    }
   };
 
   CodeMirror.defineExtension("lineComment", function(from, to, options) {

addon/comment/continuecomment.js

@@ -4,42 +4,50 @@
     CodeMirror.extendMode(modes[i], {blockCommentContinue: " * "});
 
   function continueComment(cm) {
-    var pos = cm.getCursor(), token = cm.getTokenAt(pos);
-    if (token.type != "comment" || cm.getOption("disableInput")) return CodeMirror.Pass;
-    var mode = CodeMirror.innerMode(cm.getMode(), token.state).mode;
+    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, token = cm.getTokenAt(pos);
+      if (token.type != "comment") return CodeMirror.Pass;
+      var modeHere = CodeMirror.innerMode(cm.getMode(), token.state).mode;
+      if (!mode) mode = modeHere;
+      else if (mode != modeHere) return CodeMirror.Pass;
 
-    var insert;
-    if (mode.blockCommentStart && mode.blockCommentContinue) {
-      var end = token.string.indexOf(mode.blockCommentEnd);
-      var full = cm.getRange(CodeMirror.Pos(pos.line, 0), CodeMirror.Pos(pos.line, token.end)), found;
-      if (end != -1 && end == token.string.length - mode.blockCommentEnd.length) {
-        // Comment ended, don't continue it
-      } else if (token.string.indexOf(mode.blockCommentStart) == 0) {
-        insert = full.slice(0, token.start);
-        if (!/^\s*$/.test(insert)) {
-          insert = "";
-          for (var i = 0; i < token.start; ++i) insert += " ";
+      var insert = null;
+      if (mode.blockCommentStart && mode.blockCommentContinue) {
+        var end = token.string.indexOf(mode.blockCommentEnd);
+        var full = cm.getRange(CodeMirror.Pos(pos.line, 0), CodeMirror.Pos(pos.line, token.end)), found;
+        if (end != -1 && end == token.string.length - mode.blockCommentEnd.length) {
+          // Comment ended, don't continue it
+        } else if (token.string.indexOf(mode.blockCommentStart) == 0) {
+          insert = full.slice(0, token.start);
+          if (!/^\s*$/.test(insert)) {
+            insert = "";
+            for (var i = 0; i < token.start; ++i) insert += " ";
+          }
+        } else if ((found = full.indexOf(mode.blockCommentContinue)) != -1 &&
+                   found + mode.blockCommentContinue.length > token.start &&
+                   /^\s*$/.test(full.slice(0, found))) {
+          insert = full.slice(0, found);
         }
-      } else if ((found = full.indexOf(mode.blockCommentContinue)) != -1 &&
-                 found + mode.blockCommentContinue.length > token.start &&
-                 /^\s*$/.test(full.slice(0, found))) {
-        insert = full.slice(0, found);
+        if (insert != null) insert += mode.blockCommentContinue;
       }
-      if (insert != null) insert += mode.blockCommentContinue;
-    }
-    if (insert == null && mode.lineComment) {
-      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 && mode.lineComment) {
+        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;
     }
 
-    if (insert != null)
-      cm.replaceSelection("\n" + insert, "end");
-    else
-      return CodeMirror.Pass;
+    cm.operation(function() {
+      for (var i = ranges.length - 1; i >= 0; i--)
+        cm.replaceRange(inserts[i], ranges[i].from(), ranges[i].to(), "+insert");
+    });
   }
 
   CodeMirror.defineOption("continueComments", null, function(cm, val, prev) {