From d755e1c0736df4bc4b8cb58aa6c6227cbf9c3f36 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20A=C3=9Fmus?= <superstippi@gmx.de>
Date: Wed, 20 Feb 2008 00:56:45 +0000
Subject: [PATCH] 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 |  6 ++----
 src/servers/app/WindowLayer.cpp  | 21 +++++++++++++++------
 src/servers/app/WindowLayer.h    |  3 ++-
 3 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/src/servers/app/ServerWindow.cpp b/src/servers/app/ServerWindow.cpp
index ebcec49507..1ae957aa4c 100644
--- a/src/servers/app/ServerWindow.cpp
+++ b/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:
diff --git a/src/servers/app/WindowLayer.cpp b/src/servers/app/WindowLayer.cpp
index c3cb47b7cb..aa9918d5a1 100644
--- a/src/servers/app/WindowLayer.cpp
+++ b/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;
-/*	if (fCumulativeRegion.CountRects() > 0) {
-		GetRootLayer()->MarkForRedraw(fCumulativeRegion);
-		GetRootLayer()->TriggerRedraw();
-	}*/
+	fUpdatesEnabled = true;
+	if (!fUpdateRequested && fPendingUpdateSession->IsUsed())
+		_SendUpdateMessage();
 }
 
-
 // #pragma mark -
 
 
@@ -1814,6 +1820,9 @@ WindowLayer::_TransferToUpdateSession(BRegion* contentDirtyRegion)
 void
 WindowLayer::_SendUpdateMessage()
 {
+	if (!fUpdatesEnabled)
+		return;
+
 	BMessage message(_UPDATE_);
 	ServerWindow()->SendMessageToClient(&message);
 
diff --git a/src/servers/app/WindowLayer.h b/src/servers/app/WindowLayer.h
index b2feb91133..bc232c867b 100644
--- a/src/servers/app/WindowLayer.h
+++ b/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;