cocoa: fix autohide in fullscreen

(cherry picked from commit 8ec9bce2d3)

video/out/cocoa/events_view.m

@@ -166,7 +166,8 @@
 
 - (BOOL)canHideCursor
 {
-    return !self.hasMouseDown && [self containsMouseLocation];
+    return !self.hasMouseDown && [self containsMouseLocation]
+        && [[self window] isKeyWindow];
 }
 
 - (void)mouseEntered:(NSEvent *)event

video/out/cocoa/mpvadapter.h

@@ -18,7 +18,7 @@
 #import <Cocoa/Cocoa.h>
 #include "video/out/vo.h"
 
-@interface MpvCocoaAdapter : NSObject
+@interface MpvCocoaAdapter : NSObject<NSWindowDelegate>
 - (void)setNeedsResize;
 - (void)signalMouseMovement:(NSPoint)point;
 - (void)putKeyEvent:(NSEvent*)event;

video/out/cocoa/window.m

@@ -63,12 +63,12 @@
 
 - (void)windowDidResignKey:(NSNotification *)notification
 {
-    [self.adapter didChangeMousePosition];
+    [self.adapter windowDidResignKey:notification];
 }
 
 - (void)windowDidBecomeKey:(NSNotification *)notification
 {
-    [self.adapter didChangeMousePosition];
+    [self.adapter windowDidBecomeKey:notification];
 }
 
 - (BOOL)canBecomeMainWindow { return YES; }

video/out/cocoa_common.m

@@ -58,6 +58,7 @@ struct vo_cocoa_state {
     NSWindow *window;
     NSView *view;
     MpvVideoView *video;
+    MpvCocoaAdapter *adapter;
     NSOpenGLContext *gl_ctx;
 
     NSScreen *current_screen;
@@ -169,7 +170,7 @@ static int vo_cocoa_set_cursor_visibility(struct vo *vo, bool *visible)
 
     if (*visible) {
         CGDisplayShowCursor(kCGDirectMainDisplay);
-    } else if ([v canHideCursor] && [s->window isKeyWindow]) {
+    } else if ([v canHideCursor]) {
         CGDisplayHideCursor(kCGDirectMainDisplay);
     } else {
         *visible = true;
@@ -367,6 +368,7 @@ static void create_ui(struct vo *vo, struct mp_rect *win, int geo_flags)
     [parent addSubview:s->view];
     // update the cursor position now that the view has been added.
     [view signalMousePosition];
+    s->adapter = adapter;
 
 #if HAVE_COCOA_APPLICATION
     cocoa_register_menu_item_action(MPM_H_SIZE,   @selector(halfSize));
@@ -595,6 +597,13 @@ static void vo_cocoa_fullscreen(struct vo *vo)
     draw_changes_after_next_frame(vo);
     [(MpvEventsView *)s->view setFullScreen:opts->fullscreen];
 
+    if ([s->view window] != s->window) {
+        // cocoa implements fullscreen views by moving the view to a fullscreen
+        // window. Set that window delegate to the cocoa adapter to trigger
+        // calls to -windowDidResignKey: and -windowDidBecomeKey:
+        [[s->view window] setDelegate:s->adapter];
+    }
+
     s->pending_events |= VO_EVENT_ICC_PROFILE_CHANGED;
     s->pending_events |= VO_EVENT_RESIZE;
 }
@@ -758,4 +767,15 @@ int vo_cocoa_control(struct vo *vo, int *events, int request, void *arg)
     struct vo_cocoa_state *s = self.vout->cocoa;
     [(MpvEventsView *)s->view signalMousePosition];
 }
+
+- (void)windowDidResignKey:(NSNotification *)notification
+{
+    [self didChangeMousePosition];
+}
+
+- (void)windowDidBecomeKey:(NSNotification *)notification
+{
+    [self didChangeMousePosition];
+}
+
 @end