introduce autotabplacement

src/Screen.cc

@@ -1138,6 +1138,8 @@ FluxboxWindow *BScreen::createWindow(Window client) {
 
     // check if it should be grouped with something else
     WinClient*      other = findGroupLeft(*winclient);
+    if (!other && m_placement_strategy->placementPolicy() == ScreenPlacement::AUTOTABPLACEMENT)
+        other = FocusControl::focusedWindow();
     FluxboxWindow*  win = other ? other->fbwindow() : 0;
 
     if (other && win) {

src/ScreenPlacement.cc

@@ -82,6 +82,9 @@ bool ScreenPlacement::placeWindow(const FluxboxWindow &win, int head,
         case UNDERMOUSEPLACEMENT:
             m_strategy.reset(new UnderMousePlacement());
             break;
+        case AUTOTABPLACEMENT:
+            m_strategy.reset(0);
+            break;
         }
     }
 
@@ -96,6 +99,7 @@ bool ScreenPlacement::placeWindow(const FluxboxWindow &win, int head,
     place_y = head_top;
 
     bool placed = false;
+    if (m_strategy) {
         try {
             placed = m_strategy->placeWindow(win, head, place_x, place_y);
         } catch (std::bad_cast & cast) {
@@ -105,6 +109,7 @@ bool ScreenPlacement::placeWindow(const FluxboxWindow &win, int head,
             // bad_cast from some placement strategies.
             cerr<<"Failed to place window: "<<cast.what()<<endl;
         }
+    }
 
     if (!placed) {
         // Create fallback strategy, when we need it the first time
@@ -194,6 +199,8 @@ std::string FbTk::Resource<ScreenPlacement::PlacementPolicy>::getString() const
         return "UnderMousePlacement";
     case ScreenPlacement::CASCADEPLACEMENT:
         return "CascadePlacement";
+    case ScreenPlacement::AUTOTABPLACEMENT:
+        return "AutotabPlacement";
     }
 
     return "RowSmartPlacement";
@@ -213,6 +220,8 @@ void FbTk::Resource<ScreenPlacement::PlacementPolicy>::setFromString(const char
         *(*this) = ScreenPlacement::UNDERMOUSEPLACEMENT;
     else if (strcasecmp("CascadePlacement", str) == 0)
         *(*this) = ScreenPlacement::CASCADEPLACEMENT;
+    else if (strcasecmp("AutotabPlacement", str) == 0)
+        *(*this) = ScreenPlacement::AUTOTABPLACEMENT;
     else
         setDefaultValue();
 }

src/ScreenPlacement.hh

@@ -48,7 +48,8 @@ public:
         COLMINOVERLAPPLACEMENT,
         ROWMINOVERLAPPLACEMENT,
         CASCADEPLACEMENT,
-        UNDERMOUSEPLACEMENT
+        UNDERMOUSEPLACEMENT,
+        AUTOTABPLACEMENT
     };
 
     enum RowDirection {