[PATCH v3 2/4] winex11: Don't clip while doing move/resize dragging.

[Gabriel Ivăncescu]

From: Gabriel Ivăncescu

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=53831
Signed-off-by: Gabriel Ivăncescu 
---
 dlls/winex11.drv/mouse.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/dlls/winex11.drv/mouse.c b/dlls/winex11.drv/mouse.c
index f2375a807b2..494aec81c30 100644
--- a/dlls/winex11.drv/mouse.c
+++ b/dlls/winex11.drv/mouse.c
@@ -1442,6 +1442,7 @@ void move_resize_window( HWND hwnd, int dir )
     POINT pos;
     int button = 0;
     XEvent xev;
+    BOOL was_clipped = FALSE;
     Window win, root, child;
     unsigned int xstate;

@@ -1471,7 +1472,15 @@ void move_resize_window( HWND hwnd, int dir )

/* need to ungrab the pointer that may have been automatically grabbed
      * with a ButtonPress event */
-    XUngrabPointer( display, CurrentTime );
+    if (!clipping_cursor)
+        XUngrabPointer( display, CurrentTime );
+
+    /* unclip it during drag, see Wine-Bug 53831 */
+    if (x11drv_thread_data() && x11drv_thread_data()->clipping_cursor)
+    {
+        was_clipped = TRUE;
+        ungrab_clipping_window();
+    }
     XSendEvent(display, root_window, False, SubstructureNotifyMask | SubstructureRedirectMask, &xev);

/* try to detect the end of the size/move by polling for the mouse button to be released */
@@ -1514,6 +1523,7 @@ void move_resize_window( HWND hwnd, int dir )
         if (!(xstate & (Button1Mask << (button - 1)))) break;
         NtUserMsgWaitForMultipleObjectsEx( 0, NULL, 100, QS_ALLINPUT, 0 );
     }
+    if (was_clipped) grab_clipping_window( &clip_rect );

TRACE( "hwnd %p/%lx done\n", hwnd, win );
     send_message( hwnd, WM_EXITSIZEMOVE, 0, 0 );