feat: torrent scheme deep link and file associations (#866)

ui/flutter/linux/assets/com.gopeed.Gopeed.desktop

@@ -11,4 +11,5 @@ Exec=gopeed
 Icon=com.gopeed.Gopeed
 Type=Application
 Categories=Utility;Internet
-Keywords=Bittorrent;Downloader;
+Keywords=Bittorrent;Downloader;
+MimeType=x-scheme-handler/gopeed;x-scheme-handler/magnet;application/x-bittorrent;

ui/flutter/linux/my_application.cc

@@ -17,6 +17,13 @@ G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
 // Implements GApplication::activate.
 static void my_application_activate(GApplication* application) {
   MyApplication* self = MY_APPLICATION(application);
+
+  GList* windows = gtk_application_get_windows(GTK_APPLICATION(application));
+  if (windows) {
+    gtk_window_present(GTK_WINDOW(windows->data));
+    return;
+  }
+
   GtkWindow* window =
       GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
 
@@ -79,7 +86,7 @@ static gboolean my_application_local_command_line(GApplication* application, gch
   g_application_activate(application);
   *exit_status = 0;
 
-  return TRUE;
+  return FALSE;
 }
 
 // Implements GObject::dispose.
@@ -100,6 +107,6 @@ static void my_application_init(MyApplication* self) {}
 MyApplication* my_application_new() {
   return MY_APPLICATION(g_object_new(my_application_get_type(),
                                      "application-id", APPLICATION_ID,
-                                     "flags", G_APPLICATION_NON_UNIQUE,
+                                     "flags", G_APPLICATION_HANDLES_COMMAND_LINE | G_APPLICATION_HANDLES_OPEN,
                                      nullptr));
 }

ui/flutter/linux/packaging/appimage/make_config.yaml

@@ -14,4 +14,9 @@ categories:
   - Network
   - Utility
 
+supported_mime_type:
+  - x-scheme-handler/gopeed
+  - x-scheme-handler/magnet
+  - application/x-bittorrent
+
 startup_notify: true

ui/flutter/linux/packaging/deb/make_config.yaml

@@ -28,4 +28,9 @@ categories:
   - Network
   - Utility
 
+supported_mime_type:
+  - x-scheme-handler/gopeed
+  - x-scheme-handler/magnet
+  - application/x-bittorrent
+
 startup_notify: true