libmpv/cocoa: allow clients to use mpv event system

This allows mpv's view to take key and send events to mpv's core.
To set key status correctly, clients must call -[NSWindow selectNextKeyView:]
during reconfig on the main thread. All is 'documented' in the cocoabasic
example.

If someone knows a better way to handle giving key to the embedded view,
let me know!

DOCS/client_api_examples/cocoabasic.m

@@ -45,6 +45,7 @@ static void wakeup(void *);
                       defer:NO];
 
     [self->w setTitle:@"cocoabasic example"];
+    [self->w makeMainWindow];
     [self->w makeKeyAndOrderFront:nil];
     [NSApp activateIgnoringOtherApps:YES];
 }
@@ -92,6 +93,10 @@ static void wakeup(void *);
 
         // for testing!
         check_error(mpv_set_option_string(mpv, "input-media-keys", "yes"));
+        check_error(mpv_set_option_string(mpv, "input-vo-keyboard", "yes"));
+
+        // request important errors
+        check_error(mpv_request_log_messages(mpv, "warn"));
 
         check_error(mpv_initialize(mpv));
 
@@ -116,6 +121,16 @@ static void wakeup(void *);
         });
         break;
 
+    case MPV_EVENT_LOG_MESSAGE: {
+        struct mpv_event_log_message *msg = (struct mpv_event_log_message *)event->data;
+        printf("[%s] %s: %s", msg->prefix, msg->level, msg->text);
+    }
+
+    case MPV_EVENT_VIDEO_RECONFIG:
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self->w selectNextKeyView:nil];
+        });
+
     default:
         printf("event: %s\n", mpv_event_name(event->event_id));
     }

video/out/cocoa/events_view.m

@@ -43,6 +43,7 @@
     if (self) {
         [self registerForDraggedTypes:@[NSFilenamesPboardType,
                                         NSURLPboardType]];
+        [self setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable];
     }
     return self;
 }

video/out/cocoa_common.m

@@ -183,14 +183,8 @@ void vo_cocoa_uninit(struct vo *vo)
         cocoa_rm_fs_screen_profile_observer(vo);
 
         [s->video release];
-
+        [s->view release];
-        if (!s->embedded) {
-            if ([s->view isInFullScreenMode])
-                [[s->view window] release];
-
         [s->window release];
-            s->window = nil;
-        }
     });
 }
 
@@ -307,21 +301,26 @@ static void create_ui(struct vo *vo, struct mp_rect *win, int geo_flags)
     struct mp_vo_opts *opts  = vo->opts;
 
     MpvCocoaAdapter *adapter = [[[MpvCocoaAdapter alloc] init] autorelease];
-    const NSRect contentRect =
-        NSMakeRect(win->x0, win->y0, win->x1 - win->x0, win->y1 - win->y0);
     adapter.vout = vo;
 
+    NSView *parent;
     if (s->embedded) {
-        s->view = (NSView *) (intptr_t) opts->WinID;
+        parent = (NSView *) (intptr_t) opts->WinID;
     } else {
-        s->window = create_window(contentRect, s->current_screen,
+        const NSRect wr =
-                                  opts->border, adapter);
+            NSMakeRect(win->x0, win->y0, win->x1 - win->x0, win->y1 - win->y0);
+        s->window = create_window(wr, s->current_screen, opts->border, adapter);
+        parent = [s->window contentView];
+    }
 
-        MpvEventsView *view = [[MpvEventsView alloc] initWithFrame:contentRect];
+    MpvEventsView *view = [[MpvEventsView alloc] initWithFrame:[parent bounds]];
-        [view autorelease];
     view.adapter = adapter;
     s->view = view;
-    }
+    [parent addSubview:s->view];
+
+    // insert ourselves as the next key view so that clients can give key
+    // focus to the mpv view by calling -[NSWindow selectNextKeyView:]
+    [parent setNextKeyView:s->view];
 
 #if HAVE_COCOA_APPLICATION
     cocoa_register_menu_item_action(MPM_H_SIZE,   @selector(halfSize));
@@ -335,8 +334,6 @@ static void create_ui(struct vo *vo, struct mp_rect *win, int geo_flags)
     [s->video setWantsBestResolutionOpenGLSurface:YES];
 
     [s->view addSubview:s->video];
-    [s->view setAutoresizesSubviews:YES];
-    [s->window setContentView:s->view];
     [s->gl_ctx setView:s->video];
 
     s->video.adapter = adapter;
@@ -715,22 +712,27 @@ void *vo_cocoa_cgl_pixel_format(struct vo *vo)
 }
 
 - (void)signalMouseMovement:(NSPoint)point {
+    if (mp_input_mouse_enabled(self.vout->input_ctx)) {
         mp_input_set_mouse_pos(self.vout->input_ctx, point.x, point.y);
         [self recalcMovableByWindowBackground:point];
     }
+}
 
 - (void)putKeyEvent:(NSEvent*)event
 {
+    if (mp_input_vo_keyboard_enabled(self.vout->input_ctx))
         cocoa_put_key_event(event);
 }
 
 - (void)putKey:(int)mpkey withModifiers:(int)modifiers
 {
+    if (mp_input_vo_keyboard_enabled(self.vout->input_ctx))
         cocoa_put_key_with_modifiers(mpkey, modifiers);
 }
 
 - (void)putAxis:(int)mpkey delta:(float)delta;
 {
+    if (mp_input_mouse_enabled(self.vout->input_ctx))
         mp_input_put_axis(self.vout->input_ctx, mpkey, delta);
 }