From c6482d24fff982d5e11636167c719766f8207d48 Mon Sep 17 00:00:00 2001
From: Ulrich Sibiller <uli42@gmx.de>
Date: Sat, 2 May 2015 21:53:25 +0200
Subject: Reimplement xinerama via randr in nxagent (not libNX_Xinerama).
 (Fixes ArcticaProject/nx-libs#23).

 No more xinerama faking, just use existing xrandr extension and initalize
 it properly. Xinerama then works automatically.

 Fixes ArcticaProject/nx-libs#23
---
 nx-X11/programs/Xserver/hw/nxagent/Events.c | 46 ++++++++++++++++++++++++++---
 1 file changed, 42 insertions(+), 4 deletions(-)

(limited to 'nx-X11/programs/Xserver/hw/nxagent/Events.c')

diff --git a/nx-X11/programs/Xserver/hw/nxagent/Events.c b/nx-X11/programs/Xserver/hw/nxagent/Events.c
index 9f7d6280f..03b14f0dc 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Events.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Events.c
@@ -568,6 +568,10 @@ void nxagentSwitchResizeMode(ScreenPtr pScreen)
 {
   XSizeHints sizeHints;
 
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentSwitchResizeMode called.\n");
+  #endif
+
   int desktopResize = nxagentOption(DesktopResize);
 
   nxagentChangeOption(DesktopResize, !desktopResize);
@@ -3366,7 +3370,9 @@ int nxagentHandleConfigureNotify(XEvent* X)
         if (nxagentOption(DesktopResize) == 1)
         {
           if (nxagentOption(Width) != X -> xconfigure.width ||
-                nxagentOption(Height) != X -> xconfigure.height)
+                nxagentOption(Height) != X -> xconfigure.height ||
+                nxagentOption(X) != X -> xconfigure.x ||
+                nxagentOption(Y) != X -> xconfigure.y)
           {
             Bool newEvents = False;
 
@@ -3423,11 +3429,16 @@ int nxagentHandleConfigureNotify(XEvent* X)
 
         nxagentMoveViewport(pScreen, 0, 0);
 
+        /* if in shadowing mode or if neither size nor position have
+           changed we do not need to adjust RandR */
+        /* FIXME: Comment makes no sense */
         if (nxagentOption(Shadow) == 1 ||
                 (nxagentOption(Width) == nxagentOption(RootWidth) &&
-                    nxagentOption(Height) == nxagentOption(RootHeight)))
+		 nxagentOption(Height) == nxagentOption(RootHeight) &&
+		 nxagentOption(X) == nxagentOption(RootX) &&
+		 nxagentOption(Y) == nxagentOption(RootY)))
         {
-          doRandR = 0;
+          doRandR = False;
         }
 
         nxagentChangeOption(Width, X -> xconfigure.width);
@@ -3466,12 +3477,31 @@ int nxagentHandleConfigureNotify(XEvent* X)
           #endif
 
           nxagentChangeScreenConfig(0, nxagentOption(Width),
-                                        nxagentOption(Height), 0, 0);
+                                       nxagentOption(Height), 0, 0);
         }
       }
 
       return 1;
     }
+    else
+    {
+      if (X -> xconfigure.window == DefaultRootWindow(nxagentDisplay))
+      {
+        #ifdef TEST
+        fprintf(stderr, "nxagentHandleConfigureNotify: remote root window has changed: %d,%d %dx%d\n", X -> xconfigure.x, X -> xconfigure.y, X -> xconfigure.width, X -> xconfigure.height);
+        #endif
+
+        nxagentChangeOption(RootX, X -> xconfigure.x);
+        nxagentChangeOption(RootY, X -> xconfigure.y);
+        nxagentChangeOption(RootWidth, X -> xconfigure.width);
+        nxagentChangeOption(RootHeight, X -> xconfigure.height);
+
+        nxagentChangeScreenConfig(0, nxagentOption(Width),
+                                     nxagentOption(Height), 0, 0);
+
+        return 1;
+      }
+    }
   }
 
   return 0;
@@ -4416,6 +4446,10 @@ int nxagentHandleRRScreenChangeNotify(XEvent *X)
 {
   XRRScreenChangeNotifyEvent *Xr;
 
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentHandleRRScreenChangeNotify called.\n");
+  #endif
+
   Xr = (XRRScreenChangeNotifyEvent *) X;
 
   nxagentResizeScreen(screenInfo.screens[DefaultScreen(nxagentDisplay)], Xr -> width, Xr -> height,
@@ -4504,6 +4538,10 @@ int nxagentWaitEvents(Display *dpy, struct timeval *tm)
 {
   XEvent ev;
 
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentWaitEvents called.\n");
+  #endif
+
   NXFlushDisplay(dpy, NXFlushLink);
 
   /*
-- 
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