added :panorama rename subcommand

Author: ratijas

vimperator/content/tabgroup.js

@@ -347,6 +347,35 @@ const TabGroup = Module("tabGroup", {
                     literal: 0,
                     completer: function (context) completion.tabgroup(context, false),
                 }),
+            /**
+             * Panorama SubCommand rename
+             * rename {name}.
+             * clear the name of the current group if bang(!) specified and {name} is ommited.
+             */
+            new Command(["rename", "mv"], "Rename current tab group (or reset to '(Untitled)').",
+                function (args) {
+                    let title = args.literalArg;
+                    if (!title) {
+                        if (args.bang)
+                            title = "";
+                        else {
+                            liberator.echoerr("No title supplied!  Add \"!\" if want to clear it.");
+                            return;
+                        }
+                    }
+                    let activeGroup = tabGroup.tabView.GroupItems.getActiveGroupItem();
+                    if (activeGroup)
+                        activeGroup.setTitle(title);
+                }, {
+                    bang: true,
+                    literal: 0,
+                    completer: function (context) {
+                        context.title = ["Rename current group"];
+                        let activeGroup = tabGroup.tabView.GroupItems.getActiveGroupItem();
+                        let title = activeGroup ? activeGroup.getTitle() : "";
+                        context.completions = title ? [[title, ""]] : [];
+                    }
+                }),
             /**
              * Panorama SubCommand switch
              * switch to the {group}.

vimperator/locale/en-US/tabs.xml

@@ -123,6 +123,21 @@
             </description>
         </item>
 
+        <item>
+            <tags>tabgroups-rename tabgroups-mv</tags>
+            <spec>rename<oa>!</oa> <oa>newGroupName</oa></spec>
+            <spec>mv<oa>!</oa> <oa>newGroupName</oa></spec>
+            <description>
+                <p>
+                    Rename current tab group to <oa>newGroupName</oa>.
+                </p>
+                <p>
+                    If <oa>newGroupName</oa> is not supplied and <oa>!</oa> is
+                    specified, resets group's name to <o>(Untitled)</o>.
+                </p>
+            </description>
+        </item>
+
         <item>
             <tags>tabgroups-switch</tags>
             <spec><oa>count</oa>switch <a>groupName</a></spec>