cocoa: handle files drag and drop on the player video view

osdep/macosx_application_objc.h

@@ -36,6 +36,7 @@
 - (void)initialize_menu;
 - (void)registerSelector:(SEL)selector forKey:(MPMenuKey)key;
 - (void)stopPlayback;
+- (void)handleFilesArray:(NSArray *)files;
 
 @property(nonatomic, assign) struct input_ctx *inputContext;
 @property(nonatomic, retain) EventsResponder *eventsResponder;

video/out/cocoa/mpvadapter.h

@@ -25,6 +25,7 @@
 - (void)putAxis:(int)mpkey delta:(float)delta;
 - (void)putCommand:(char*)cmd;
 - (void)performAsyncResize:(NSSize)size;
+- (void)handleFilesArray:(NSArray *)files;
 
 - (BOOL)isInFullScreenMode;
 - (NSSize)videoSize;

video/out/cocoa/view.h

@@ -18,7 +18,7 @@
 #import <Cocoa/Cocoa.h>
 #import "video/out/cocoa/mpvadapter.h"
 
-@interface MpvVideoView : NSView {
+@interface MpvVideoView : NSView <NSDraggingDestination> {
     BOOL hasMouseDown;
 }
 @property(nonatomic, retain) MpvCocoaAdapter *adapter;

video/out/cocoa/view.m

@@ -30,6 +30,14 @@
 @synthesize adapter = _adapter;
 @synthesize tracker = _tracker;
 
+- (id)initWithFrame:(NSRect)frame {
+    self = [super initWithFrame:frame];
+    if (self) {
+        [self registerForDraggedTypes:@[NSFilenamesPboardType]];
+    }
+    return self;
+}
+
 - (void)setFullScreen:(BOOL)willBeFullscreen
 {
     if (willBeFullscreen && ![self isInFullScreenMode]) {
@@ -223,4 +231,17 @@
     [self.adapter performAsyncResize:[self frameInPixels].size];
     [self.adapter setNeedsResize];
 }
+
+- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
+{
+    return NSDragOperationEvery;
+}
+
+- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
+{
+    NSPasteboard *pboard = [sender draggingPasteboard];
+    NSArray *pbitems = [pboard propertyListForType:NSFilenamesPboardType];
+    [self.adapter handleFilesArray:pbitems];
+    return YES;
+}
 @end

video/out/cocoa_common.m

@@ -29,6 +29,7 @@
 
 #include "osdep/macosx_compat.h"
 #include "osdep/macosx_application.h"
+#include "osdep/macosx_application_objc.h"
 #include "osdep/macosx_events.h"
 
 #include "config.h"
@@ -660,4 +661,9 @@ int vo_cocoa_cgl_color_size(struct vo *vo)
     struct vo_cocoa_state *s = self.vout->cocoa;
     return s->fs_screen;
 }
+
+- (void)handleFilesArray:(NSArray *)files
+{
+    [mpv_shared_app() handleFilesArray:files];
+}
 @end