code: function(event) {
        var electric = Editor.Parser.electricChars, self = this;
        // Hack for Opera, and Firefox on OS X, in which stopping a
        // keydown event does not prevent the associated keypress event
        // from happening, so we have to cancel enter and tab again
        // here.
        if ((this.frozen && (!this.keyFilter || this.keyFilter(event.keyCode))) ||
            event.code == 13 || (event.code == 9 && this.options.tabMode != "default") ||
            (event.keyCode == 32 && event.shiftKey && this.options.tabMode == "default"))
          event.stop();
        else if (electric && electric.indexOf(event.character) != -1)
          this.parent.setTimeout(function(){self.indentAtCursor(null);}, 0);
        else if ((event.character == "v" || event.character == "V")
                 && (event.ctrlKey || event.metaKey) && !event.altKey) // ctrl-V
          this.reroutePasteEvent();
      }
docs: Check for characters that should re-indent the current line, and prevent Opera from handling enter and tab anyway.