Adding :tabduplicate patch from Konstantin Stepanov

AUTHORS

@@ -12,7 +12,7 @@ Inactive/former developers:
   * Viktor Kojouharov (Виктор Кожухаров)
  
 Patches (in no special order):
-  * Konstantin Stepanov (:%foo support)
+  * Konstantin Stepanov (:%foo support, :tabduplicate)
   * Lukas Mai
   * Guido Van Hoecke
   * Daniel Trstenjak (various things with hints)

NEWS

@@ -8,6 +8,7 @@
       generous donation which made this behavior possible)
     * IMPORTANT: ctrl-x/a never take possible negative URLs into account, it was just
       too unpredictable
+    * add :tabduplicate command 
     * new 'urlseparator' option for specifying the regexp used to split the arg to
       :open, :tabopen and :winopen
     * :set editor now accepts quoting/escaping to use an editor with spaces in the path

content/tabs.js

@@ -426,6 +426,23 @@ liberator.Tabs = function () //{{{
                     liberator.open("about:blank", where);
             },
             { completer: function (filter) { return liberator.completion.url(filter); } });
+
+        liberator.commands.add(["tabd[uplicate]"],
+            "Duplicate current tab",
+            function (args, special, count)
+            {
+                var tab = liberator.tabs.getTab();
+
+                var activate = special ? true : false;
+                if (/\btabopen\b/.test(liberator.options["activate"]))
+                    activate = !activate;
+
+                if (count < 1)
+                    count = 1;
+
+                for (var i = 0; i < count; i++)
+                    liberator.tabs.cloneTab(tab, activate);
+            });
     }
 
     if (liberator.has("session"))
@@ -795,6 +812,23 @@ liberator.Tabs = function () //{{{
             }
         },
 
+        cloneTab: function (tab, activate)
+        {
+            var ss = Components.classes["@mozilla.org/browser/sessionstore;1"].
+                     getService(Components.interfaces.nsISessionStore);
+
+            if (!tab)
+                tab = getBrowser().mTabContainer.selectedItem;
+
+            var tabState = ss.getTabState(tab);
+            var newTab = getBrowser().addTab();
+            ss.setTabState(newTab, tabState);
+            if (activate)
+                getBrowser().mTabContainer.selectedItem = newTab;
+
+            return newTab;
+        },
+
         // TODO: when restarting a session FF selects the first tab and then the
         // tab that was selected when the session was created.  As a result the
         // alternate after a restart is often incorrectly tab 1 when there

locale/en-US/browsing.txt

@@ -71,6 +71,13 @@ in a new tab. When used with [a]![a], the 'tabopen' value of the 'activate' opti
 ________________________________________________________________________________
 
 
+|:tabd| |:tabduplicate|
+||:[count]tabd[uplicate][!]|| +
+________________________________________________________________________________
+Duplicates current tab [count] times. Uses 'tabopen' value of the 'activate' to determine
+if last cloned tab should be activated. When used with [a]![a], 'tabopen' value is negated.
+________________________________________________________________________________
+
 
 |:winopen| |:wopen| |:winedit|
 ||:wino[pen][!] [arg1], [arg2], ...|| +