From: Ken Thomases <ken@codeweavers.com>
Subject: winemac: When ClipCursor() is called redundantly, don't warp the cursor or discard mouse move events.
Message-Id: <5ED776A0-0A3F-409C-8D21-0A5138D0FF0E@codeweavers.com>
Date: Mon, 16 Dec 2013 19:42:22 -0600


Fixes a problem in some games which repeatedly (re)establish the same cursor
clipping rect, making it exceedingly difficult to move the camera with the
mouse.
---
dlls/winemac.drv/cocoa_app.m | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/dlls/winemac.drv/cocoa_app.m b/dlls/winemac.drv/cocoa_app.m
index c2f7604..d036cbd 100644
--- a/dlls/winemac.drv/cocoa_app.m
+++ b/dlls/winemac.drv/cocoa_app.m
@@ -1353,6 +1353,10 @@ - (BOOL) startClippingCursor:(CGRect)rect
         if (!cursorClippingEventTap && ![self installEventTap])
             return FALSE;
 
+        if (clippingCursor && CGRectEqualToRect(rect, cursorClipRect) &&
+            CGEventTapIsEnabled(cursorClippingEventTap))
+            return TRUE;
+
         err = CGAssociateMouseAndMouseCursorPosition(false);
         if (err != kCGErrorSuccess)
             return FALSE;