[PATCH] winemac.drv: Also stop dragging if we receive a mouse up event.

[Chip Davis]

We rely on AppKit-internal events to know when a window is being
dragged. In Catalina, AppKit stopped sending the "drag ended" event when
no drag actually took place, though it still sends "drag started" events
when the title bar is clicked. Ironically, this caused us to think the
window was still being dragged. In that case, waiting for the mouse
button to come back up should allow us to determine when the drag should
end.

Signed-off-by: Chip Davis <cdavis at codeweavers.com>
---
 dlls/winemac.drv/cocoa_app.m | 58 ++++++++++++++++++++----------------
 1 file changed, 32 insertions(+), 26 deletions(-)

diff --git a/dlls/winemac.drv/cocoa_app.m b/dlls/winemac.drv/cocoa_app.m
index 15bbf64558b..db37fdf46a0 100644
--- a/dlls/winemac.drv/cocoa_app.m
+++ b/dlls/winemac.drv/cocoa_app.m
@@ -1586,6 +1586,34 @@ - (void) windowWillOrderOut:(WineWindow*)window
         }
     }
 
+    - (void) handleWindowDrag:(NSEvent*)anEvent begin:(BOOL)begin
+    {
+        WineWindow* window = (WineWindow*)[anEvent window];
+        if ([window isKindOfClass:[WineWindow class]])
+        {
+            macdrv_event* event;
+            int eventType;
+
+            if (begin)
+            {
+                [windowsBeingDragged addObject:window];
+                eventType = WINDOW_DRAG_BEGIN;
+            }
+            else
+            {
+                [windowsBeingDragged removeObject:window];
+                eventType = WINDOW_DRAG_END;
+            }
+            [self updateCursorClippingState];
+
+            event = macdrv_create_event(eventType, window);
+            if (eventType == WINDOW_DRAG_BEGIN)
+                event->window_drag_begin.no_activate = [NSEvent wine_commandKeyDown];
+            [window.queue postEvent:event];
+            macdrv_release_event(event);
+        }
+    }
+
     - (void) handleMouseMove:(NSEvent*)anEvent
     {
         WineWindow* targetWindow;
@@ -1740,6 +1768,9 @@ - (void) handleMouseButton:(NSEvent*)theEvent
         WineWindow* windowBroughtForward = nil;
         BOOL process = FALSE;
 
+        if (type == NSLeftMouseUp && [windowsBeingDragged count])
+            [self handleWindowDrag:theEvent begin:NO];
+
         if ([window isKindOfClass:[WineWindow class]] &&
             type == NSLeftMouseDown &&
             ![theEvent wine_commandKeyDown])
@@ -2092,32 +2123,7 @@ - (BOOL) handleEvent:(NSEvent*)anEvent
             // "a window is being dragged" and "a window is no longer being
             // dragged", respectively.
             if (subtype == 20 || subtype == 21)
-            {
-                WineWindow* window = (WineWindow*)[anEvent window];
-                if ([window isKindOfClass:[WineWindow class]])
-                {
-                    macdrv_event* event;
-                    int eventType;
-
-                    if (subtype == 20)
-                    {
-                        [windowsBeingDragged addObject:window];
-                        eventType = WINDOW_DRAG_BEGIN;
-                    }
-                    else
-                    {
-                        [windowsBeingDragged removeObject:window];
-                        eventType = WINDOW_DRAG_END;
-                    }
-                    [self updateCursorClippingState];
-
-                    event = macdrv_create_event(eventType, window);
-                    if (eventType == WINDOW_DRAG_BEGIN)
-                        event->window_drag_begin.no_activate = [NSEvent wine_commandKeyDown];
-                    [window.queue postEvent:event];
-                    macdrv_release_event(event);
-                }
-            }
+                [self handleWindowDrag:anEvent begin:(subtype == 20)];
         }
 
         return ret;
-- 
2.21.0