4 files changed, 43 insertions, 3 deletions

diff --git a/xorg-server/hw/xwin/InitOutput.c b/xorg-server/hw/xwin/InitOutput.c
index 5941a2116..a40446d98 100644
--- a/xorg-server/hw/xwin/InitOutput.c
+++ b/xorg-server/hw/xwin/InitOutput.c
@@ -676,6 +676,34 @@ OsVendorInit (void)
       /* We have to flag this as an explicit screen, even though it isn't */
       g_ScreenInfo[0].fExplicitScreen = TRUE;
     }
+
+  /* Work out what the default emulate3buttons setting should be, and apply
+     it if nothing was explicitly specified */
+  {
+    int mouseButtons = GetSystemMetrics(SM_CMOUSEBUTTONS);
+    int j;
+
+    for (j = 0; j < g_iNumScreens; j++)
+      {
+        if (g_ScreenInfo[j].iE3BTimeout == WIN_E3B_DEFAULT)
+          {
+            if (mouseButtons < 3)
+              {
+                static Bool reportOnce = TRUE;
+                g_ScreenInfo[j].iE3BTimeout = WIN_DEFAULT_E3B_TIME;
+                if (reportOnce)
+                  {
+                    reportOnce = FALSE;
+                    winDebug("Windows reports only %d mouse buttons, defaulting to -emulate3buttons\n", mouseButtons);
+                  }
+              }
+            else
+              {
+                g_ScreenInfo[j].iE3BTimeout = WIN_E3B_OFF;
+              }
+          }
+      }
+  }
 }
 
 
@@ -713,7 +741,7 @@ winUseMsg (void)
 	  "\tSpecify an optional bitdepth to use in fullscreen mode\n"
 	  "\twith a DirectDraw engine.\n");
 
-  ErrorF ("-emulate3buttons [timeout]\n"
+  ErrorF ("-[no]emulate3buttons [timeout]\n"
 	  "\tEmulate 3 button mouse with an optional timeout in\n"
 	  "\tmilliseconds.\n");
 
diff --git a/xorg-server/hw/xwin/win.h b/xorg-server/hw/xwin/win.h
index 5de97af85..5ec7e3bee 100644
--- a/xorg-server/hw/xwin/win.h
+++ b/xorg-server/hw/xwin/win.h
@@ -97,6 +97,7 @@
 #define MOUSE_POLLING_INTERVAL		50
 
 #define WIN_E3B_OFF		-1
+#define WIN_E3B_DEFAULT		 0
 #define WIN_FD_INVALID		-1
 
 #define WIN_SERVER_NONE		0x0L	/* 0 */
diff --git a/xorg-server/hw/xwin/winmouse.c b/xorg-server/hw/xwin/winmouse.c
index 75e51c2f9..9debead0d 100644
--- a/xorg-server/hw/xwin/winmouse.c
+++ b/xorg-server/hw/xwin/winmouse.c
@@ -71,6 +71,7 @@ winMouseProc (DeviceIntPtr pDeviceInt, int iState)
     case DEVICE_INIT:
       /* Get number of mouse buttons */
       lngMouseButtons = GetSystemMetrics(SM_CMOUSEBUTTONS);
+      winDebug("%d mouse buttons found\n", lngMouseButtons);
 
       /* Mapping of windows events to X events:
        * LEFT:1 MIDDLE:2 RIGHT:3
@@ -81,7 +82,6 @@ winMouseProc (DeviceIntPtr pDeviceInt, int iState)
        */
       if (lngMouseButtons < 3)
         lngMouseButtons = 3;
-      winDebug("%d mouse buttons found\n", lngMouseButtons);
 
       /* allocate memory: 
        * number of buttons + 2x mouse wheel event + 1 extra (offset for map) 
diff --git a/xorg-server/hw/xwin/winprocarg.c b/xorg-server/hw/xwin/winprocarg.c
index 7cce026c1..3db9a1c3e 100644
--- a/xorg-server/hw/xwin/winprocarg.c
+++ b/xorg-server/hw/xwin/winprocarg.c
@@ -144,7 +144,7 @@ winInitializeScreenDefaults(void)
   defaultScreenInfo.fLessPointer = FALSE;
   defaultScreenInfo.iResizeMode = notAllowed;
   defaultScreenInfo.fNoTrayIcon = FALSE;
-  defaultScreenInfo.iE3BTimeout = WIN_E3B_OFF;
+  defaultScreenInfo.iE3BTimeout = WIN_E3B_DEFAULT;
   defaultScreenInfo.fUseWinKillKey = WIN_DEFAULT_WIN_KILL;
   defaultScreenInfo.fUseUnixKillKey = WIN_DEFAULT_UNIX_KILL;
   defaultScreenInfo.fIgnoreInput = FALSE;
@@ -813,6 +813,17 @@ ddxProcessArgument (int argc, char *argv[], int i)
       return iArgsProcessed;
     }
 
+   /*
+   * Look for the '-noemulate3buttons' argument
+   */
+  if (IS_OPTION ("-noemulate3buttons"))
+    {
+      screenInfoPtr->iE3BTimeout = WIN_E3B_OFF;
+
+      /* Indicate that we have processed this argument */
+      return 1;
+    }
+
   /*
    * Look for the '-depth n' argument
    */