macosx: add multiple files dragged to dock icon together

close #4358

(cherry picked from commit 13e2c3bdfba86c9a1400deb9b14e201bbb40ec9e)
(cherry picked from commit cfaaf916909b5483d6128cd6cd9b36deb72779df)
(cherry picked from commit a89495bbddc454522e777a2f8abf2cb90424787a)
Signed-off-by: David Fuhrmann <david.fuhrmann@googlemail.com>

modules/gui/macosx/intf.h

@@ -196,7 +196,7 @@ struct intf_sys_t
 - (void)showFullscreenController;
 - (void)updateDelays;
 - (void)initStrings;
-- (BOOL)application:(NSApplication *)o_app openFile:(NSString *)o_filename;
+- (BOOL)application:(NSApplication *)o_app openFiles:(NSString *)o_filename;
 
 - (IBAction)crashReporterAction:(id)sender;
 - (IBAction)openCrashLog:(id)sender;

modules/gui/macosx/intf.m

@@ -900,39 +900,48 @@ static VLCMain *_o_sharedMainInstance = nil;
 }
 
 #pragma mark -
-#pragma mark File opening
+#pragma mark File opening over dock icon
 
-- (BOOL)application:(NSApplication *)o_app openFile:(NSString *)o_filename
+- (BOOL)application:(NSApplication *)o_app openFiles:(NSArray *)o_names
 {
     BOOL b_autoplay = config_GetInt( VLCIntf, "macosx-autoplay" );
-    char *psz_uri = make_URI([o_filename UTF8String], "file" );
-    if( !psz_uri )
-        return( FALSE );
+    char *psz_uri = make_URI([[o_names objectAtIndex:0] UTF8String], "file" );
 
+    // try to add file as subtitle
+    if( [o_names count] == 1 && psz_uri )
+    {
         input_thread_t * p_input = pl_CurrentInput( VLCIntf );
-    BOOL b_returned = NO;
-
-    if (p_input)
+        if( p_input )
         {
+            BOOL b_returned = NO;
             b_returned = input_AddSubtitle( p_input, psz_uri, true );
             vlc_object_release( p_input );
-        if(!b_returned)
+            if( !b_returned )
             {
                 free( psz_uri );
                 return YES;
             }
         }
-    else if( p_input )
-        vlc_object_release( p_input );
+    }
+    free( psz_uri );
 
-    NSDictionary *o_dic = [NSDictionary dictionaryWithObject:[NSString stringWithCString:psz_uri encoding:NSUTF8StringEncoding] forKey:@"ITEM_URL"];
+    NSArray *o_sorted_names = [o_names sortedArrayUsingSelector: @selector(caseInsensitiveCompare:)];
+    NSMutableArray *o_result = [NSMutableArray arrayWithCapacity: [o_sorted_names count]];
+    for( int i = 0; i < [o_sorted_names count]; i++ )
+    {
+        psz_uri = make_URI([[o_sorted_names objectAtIndex: i] UTF8String], "file" );
+        if( !psz_uri )
+            continue;
 
+        NSDictionary *o_dic = [NSDictionary dictionaryWithObject:[NSString stringWithCString:psz_uri encoding:NSUTF8StringEncoding] forKey:@"ITEM_URL"];
         free( psz_uri );
+        [o_result addObject: o_dic];
+    }
 
     if( b_autoplay )
-        [o_playlist appendArray: [NSArray arrayWithObject: o_dic] atPos: -1 enqueue: NO];
+        [o_playlist appendArray: o_result atPos: -1 enqueue: NO];
     else
-        [o_playlist appendArray: [NSArray arrayWithObject: o_dic] atPos: -1 enqueue: YES];
+        [o_playlist appendArray: o_result atPos: -1 enqueue: YES];
 
     return( TRUE );
 }