macosx_application: handle mpv:// links

Pretty useful for people writing userscripts for web browsers. Links starting
with 'mpv://' are forwarded to the mpv OSX bundle. The leading 'mpv://' is
stripped from the recived url and the rest of the string is inserted as is in
the playlist.

TOOLS/osxbundle/mpv.app/Contents/Info.plist

@@ -186,6 +186,16 @@
     <true/>
     <key>CFBundleURLTypes</key>
     <array>
+      <dict>
+        <key>CFBundleTypeRole</key>
+        <string>Viewer</string>
+        <key>CFBundleURLName</key>
+        <string>mpv Custom Protocol</string>
+        <key>CFBundleURLSchemes</key>
+        <array>
+          <string>mpv</string>
+        </array>
+      </dict>
       <dict>
         <key>CFBundleTypeRole</key>
         <string>Viewer</string>

osdep/macosx_application.m

@@ -26,6 +26,8 @@
 #include "osdep/macosx_application_objc.h"
 #include "osdep/macosx_compat.h"
 
+#define MPV_PROTOCOL @"mpv://"
+
 static pthread_t playback_thread_id;
 
 @interface Application (PrivateMethods)
@@ -241,6 +243,11 @@ static NSString *escape_loadfile_name(NSString *input)
     NSString *url =
         [[event paramDescriptorForKeyword:keyDirectObject] stringValue];
 
+    url = [url stringByReplacingOccurrencesOfString:MPV_PROTOCOL
+                withString:@""
+                   options:NSAnchoredSearch
+                     range:NSMakeRange(0, [MPV_PROTOCOL length])];
+
     self.files = @[url];
 
     if (self.willStopOnOpenEvent) {