osxbundle: cocoa_common: change playlist on fileopen events

When opening new files in Finder when `mpv` is running from an application
bundle, the new files will now replace the current playlist.

Fixes #14

video/out/cocoa_common.m

@@ -767,6 +767,26 @@ void create_menu()
     }
 }
 
+- (void)application:(NSApplication *)sender openFiles:(NSArray *)filenames
+{
+    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    NSArray *sorted_filenames = [filenames
+        sortedArrayUsingSelector:@selector(compare:)];
+
+    for (int i = 0; i < [sorted_filenames count]; i++) {
+        NSString *filename = [sorted_filenames objectAtIndex:i];
+        NSString *escaped_filename = escape_loadfile_name(filename);
+
+        char *cmd = talloc_asprintf(NULL, "loadfile \"%s\"%s",
+                                    [escaped_filename UTF8String],
+                                    (i == 0) ? "" : " append");
+        mp_input_queue_cmd(_vo->input_ctx, mp_input_parse_cmd(bstr0(cmd), ""));
+        talloc_free(cmd);
+    }
+
+    [pool release];
+}
+
 - (void)applicationWillBecomeActive:(NSNotification *)aNotification
 {
     if (vo_fs && current_screen_has_dock_or_menubar(_vo)) {

video/out/osx_common.h

@@ -23,5 +23,6 @@ struct vo;
 
 int convert_key(unsigned key, unsigned charcode);
 int is_osx_version_at_least(int majorv, int minorv, int bugfixv);
+NSString *escape_loadfile_name(NSString *input);
 
 #endif /* MPLAYER_OSX_COMMON_H */

video/out/osx_common.m

@@ -152,3 +152,24 @@ cleanup_and_return:
     [pool release];
     return rv;
 }
+
+struct escape_couple {
+    NSString *in;
+    NSString *out;
+};
+
+static struct escape_couple escapes[] = {
+    { @"\\", @"\\\\" },
+    { @"\"", @"\\\"" },
+    { NULL, NULL }
+};
+
+NSString *escape_loadfile_name(NSString *input)
+{
+    for (int i = 0; escapes[i].out; i++) {
+        input = [input stringByReplacingOccurrencesOfString:escapes[i].in
+                                                 withString:escapes[i].out];
+    }
+
+    return input;
+}