Implemented Enable/DisableUpdates again on the app_server side. Untested. It

should prevent the app_server to send any update messages to the client. It
should just keep adding to the pending update sessions region until the client
enabled updates again. If anything is already in the pending session, an
update request will be send immediately.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24029 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/ServerWindow.cpp

@@ -705,16 +705,14 @@ ServerWindow::_DispatchMessage(int32 code, BPrivate::LinkReceiver &link)
 		{
 			STRACE(("ServerWindow %s: Message AS_ENABLE_UPDATES unimplemented\n",
 				Title()));
-// TODO: AS_ENABLE_UPDATES
+			fWindowLayer->EnableUpdateRequests();
-			//fWindowLayer->EnableUpdateRequests();
 			break;
 		}
 		case AS_DISABLE_UPDATES:
 		{
 			STRACE(("ServerWindow %s: Message AS_DISABLE_UPDATES unimplemented\n",
 				Title()));
-// TODO: AS_DISABLE_UPDATES
+			fWindowLayer->DisableUpdateRequests();
-			//fWindowLayer->DisableUpdateRequests();
 			break;
 		}
 		case AS_NEEDS_UPDATE:

src/servers/app/WindowLayer.cpp

@@ -111,6 +111,7 @@ WindowLayer::WindowLayer(const BRect& frame, const char *name,
 	fPendingUpdateSession(&fUpdateSessions[1]),
 	fUpdateRequested(false),
 	fInUpdate(false),
+	fUpdatesEnabled(true),
 
 	// windows start hidden
 	fHidden(true),
@@ -701,18 +702,23 @@ WindowLayer::InvalidateView(ViewLayer* layer, BRegion& layerRegion)
 	}
 }
 
+// DisableUpdateRequests
+void
+WindowLayer::DisableUpdateRequests()
+{
+	fUpdatesEnabled = false;
+}
+
+
 // EnableUpdateRequests
 void
 WindowLayer::EnableUpdateRequests()
 {
-//	fUpdateRequestsEnabled = true;
+	fUpdatesEnabled = true;
-/*	if (fCumulativeRegion.CountRects() > 0) {
+	if (!fUpdateRequested && fPendingUpdateSession->IsUsed())
-		GetRootLayer()->MarkForRedraw(fCumulativeRegion);
+		_SendUpdateMessage();
-		GetRootLayer()->TriggerRedraw();
-	}*/
 }
 
-
 // #pragma mark -
 
 
@@ -1814,6 +1820,9 @@ WindowLayer::_TransferToUpdateSession(BRegion* contentDirtyRegion)
 void
 WindowLayer::_SendUpdateMessage()
 {
+	if (!fUpdatesEnabled)
+		return;
+
 	BMessage message(_UPDATE_);
 	ServerWindow()->SendMessageToClient(&message);
 

src/servers/app/WindowLayer.h

@@ -104,8 +104,8 @@ class WindowLayer {
 			// shortcut for invalidating just one view
 			void				InvalidateView(ViewLayer* view, BRegion& layerRegion);
 
-			void				EnableUpdateRequests();
 			void				DisableUpdateRequests();
+			void				EnableUpdateRequests();
 
 			void				BeginUpdate(BPrivate::PortLink& link);
 			void				EndUpdate();
@@ -335,6 +335,7 @@ class WindowLayer {
 			// and consistent update session
 			bool				fUpdateRequested : 1;
 			bool				fInUpdate : 1;
+			bool				fUpdatesEnabled : 1;
 
 			bool				fHidden : 1;
 			bool				fMinimized : 1;