macosx_application: implement "Quit & remember position"

Add a menu item to quit and save the current playback position using the code
added with commit ce9a854.

Fixes #85

core/mplayer.c

@@ -3969,7 +3969,7 @@ static void init_input(struct MPContext *mpctx)
     stream_set_interrupt_callback(mp_input_check_interrupt, mpctx->input);
 
 #ifdef CONFIG_COCOA
-    cocoa_set_state(mpctx->input, mpctx->key_fifo);
+    cocoa_set_input_context(mpctx->input);
 #endif
 }
 

osdep/macosx_application.h

@@ -49,7 +49,7 @@ void cocoa_run_runloop(void);
 void cocoa_stop_runloop(void);
 void cocoa_post_fake_event(void);
 
-void cocoa_set_state(struct input_ctx *input_context, struct mp_fifo *key_fifo);
+void cocoa_set_input_context(struct input_ctx *input_context);
 
 void macosx_finder_args_preinit(int *argc, char ***argv);
 

osdep/macosx_application.m

@@ -86,6 +86,9 @@ static pthread_t playback_thread_id;
                       action:@selector(hide:) keyEquivalent: @"h"];
     [self menuItemWithParent:menu title:@"Quit mpv"
                       action:@selector(stopPlayback) keyEquivalent: @"q"];
+    [self menuItemWithParent:menu title:@"Quit mpv & remember position"
+                      action:@selector(stopPlaybackAndRememberPosition)
+               keyEquivalent: @"Q"];
     return [menu autorelease];
 }
 
@@ -120,13 +123,25 @@ static pthread_t playback_thread_id;
 
 - (void)stopPlayback
 {
-    if (app.keyFIFO) {
-        mplayer_put_key(app.keyFIFO, MP_KEY_CLOSE_WIN);
+    [self stop:"quit"];
+}
+
+- (void)stopPlaybackAndRememberPosition
+{
+    [self stop:"quit_watch_later"];
+}
+
+- (void)stop:(char *)cmd
+{
+    if (self.inputContext) {
+        mp_cmd_t *cmdt = mp_input_parse_cmd(bstr0(cmd), "");
+        mp_input_queue_cmd(self.inputContext, cmdt);
     } else {
         terminate_cocoa_application();
     }
 }
 
+
 - (void)registerMenuItem:(NSMenuItem*)menuItem forKey:(MPMenuKey)key
 {
     [self.menuItems setObject:menuItem forKey:[NSNumber numberWithInt:key]];
@@ -295,12 +310,10 @@ void cocoa_stop_runloop(void)
     cocoa_post_fake_event();
 }
 
-void cocoa_set_state(struct input_ctx *input_context,
-                     struct mp_fifo *key_fifo)
+void cocoa_set_input_context(struct input_ctx *input_context)
 {
     [NSApp setDelegate:app];
-    app.inputContext        = input_context;
-    app.keyFIFO             = key_fifo;
+    app.inputContext = input_context;
 }
 
 void cocoa_post_fake_event(void)