Implemented AS_COUNT_WORKSPACES and AS_SET_WORKSPACE_COUNT server side.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15253 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/RootLayer.cpp

@@ -547,6 +547,22 @@ RootLayer::_WindowsChanged(BRegion& region)
 }
 
 
+void
+RootLayer::UpdateWorkspaces()
+{
+	BAutolock _(fAllRegionsLock);
+
+	if (fWorkspacesLayer == NULL)
+		return;
+
+	BRegion changed;
+	_WindowsChanged(changed);
+
+	MarkForRedraw(changed);
+	TriggerRedraw();
+}
+
+
 WindowLayer*
 RootLayer::WindowAt(BPoint where)
 {
@@ -562,9 +578,6 @@ RootLayer::WindowAt(BPoint where)
 }
 
 
-//	#pragma mark - Input related methods
-
-
 void
 RootLayer::SetMouseEventWindow(WindowLayer* window)
 {

src/servers/app/RootLayer.h

@@ -87,6 +87,8 @@ class RootLayer : public Layer {
 		void				SetWindowLayerFeel(WindowLayer *windowLayer, int32 newFeel);
 		void				SetWindowLayerLook(WindowLayer *windowLayer, int32 newLook);
 
+		void				UpdateWorkspaces();
+
 		void				MarkForRedraw(const BRegion &dirty);
 		void				TriggerRedraw();
 

src/servers/app/ServerApp.cpp

@@ -845,15 +845,42 @@ ServerApp::_DispatchMessage(int32 code, BPrivate::LinkReceiver& link)
 			break;
 		}
 #endif
-		case AS_CURRENT_WORKSPACE:
+		case AS_COUNT_WORKSPACES:
 		{
+			DesktopSettings settings(fDesktop);
+
+			fLink.StartMessage(B_OK);
+			fLink.Attach<int32>(settings.WorkspacesCount());
+			fLink.Flush();
+			break;
+		}
+
+		case AS_SET_WORKSPACE_COUNT:
+		{
+			DesktopSettings settings(fDesktop);
+
+			int32 newCount;
+			if (link.Read<int32>(&newCount) == B_OK) {
+				settings.SetWorkspacesCount(newCount);
+
+				// either update the workspaces window, or switch to
+				// the last available workspace - which will update
+				// the workspaces window automatically
+				if (fDesktop->CurrentWorkspace() >= newCount)
+					fDesktop->SetWorkspace(newCount - 1);
+				else
+					fDesktop->RootLayer()->UpdateWorkspaces();
+			}
+			break;
+		}
+
+		case AS_CURRENT_WORKSPACE:
 			STRACE(("ServerApp %s: get current workspace\n", Signature()));
 
 			fLink.StartMessage(B_OK);
 			fLink.Attach<int32>(fDesktop->CurrentWorkspace());
 			fLink.Flush();
 			break;
-		}
 
 		case AS_ACTIVATE_WORKSPACE:
 		{