Merge pull request #530 from Rafostar/pipeline-preview-launcher

Ability to show GStreamer pipeline

src/bin/clapper-app/clapper-app-application.c

@@ -41,6 +41,7 @@ struct _ClapperAppApplication
   GtkApplication parent;
 
   GSettings *settings;
+  GCancellable *cancellable;
 
   gboolean need_init_state;
 };
@@ -61,6 +62,12 @@ struct ClapperPluginData
   struct ClapperPluginFeatureData features[10];
 };
 
+typedef struct
+{
+  ClapperAppApplication *app;
+  guint id;
+} ClapperAppWindowData;
+
 typedef struct
 {
   const gchar *action;
@@ -317,6 +324,19 @@ _assemble_initial_state (GtkWindow *window)
   g_object_unref (builder);
 }
 
+static void
+_show_error_dialog (GError *error, GtkWindow *parent)
+{
+  AdwDialog *dialog;
+
+  dialog = adw_alert_dialog_new ("Error", error->message);
+  adw_alert_dialog_add_response (ADW_ALERT_DIALOG (dialog), "close", _("Close"));
+  adw_alert_dialog_set_default_response (ADW_ALERT_DIALOG (dialog), "close");
+  adw_alert_dialog_set_close_response (ADW_ALERT_DIALOG (dialog), "close");
+
+  adw_dialog_present (dialog, GTK_WIDGET (parent));
+}
+
 static void
 add_files (GSimpleAction *action, GVariant *param, gpointer user_data)
 {
@@ -395,6 +415,102 @@ show_info (GSimpleAction *action, GVariant *param, gpointer user_data)
   gtk_window_present (GTK_WINDOW (info_window));
 }
 
+static void
+_launch_pipeline_cb (GtkFileLauncher *launcher,
+    GAsyncResult *res, ClapperAppWindowData *win_data)
+{
+  GError *error = NULL;
+
+  if (!gtk_file_launcher_launch_finish (launcher, res, &error)) {
+    if (error->domain != GTK_DIALOG_ERROR || error->code != GTK_DIALOG_ERROR_DISMISSED) {
+      GtkWindow *window;
+
+      GST_ERROR ("Could not launch pipeline preview, reason: %s",
+          GST_STR_NULL (error->message));
+
+      if ((window = gtk_application_get_window_by_id (
+          GTK_APPLICATION (win_data->app), win_data->id)))
+        _show_error_dialog (error, window);
+    }
+    g_error_free (error);
+  }
+  g_free (win_data);
+}
+
+static void
+_show_pipeline_cb (GObject *source G_GNUC_UNUSED,
+    GAsyncResult *res, ClapperAppWindowData *win_data)
+{
+  GTask *task = G_TASK (res);
+  GtkWindow *window;
+  GFile *svg_file;
+  GError *error = NULL;
+
+  svg_file = (GFile *) g_task_propagate_pointer (task, &error);
+  window = gtk_application_get_window_by_id (
+      GTK_APPLICATION (win_data->app), win_data->id);
+
+  if (error) {
+    if (error->domain != G_IO_ERROR || error->code != G_IO_ERROR_CANCELLED) {
+      GST_ERROR ("Could not create pipeline graph file, reason: %s",
+          GST_STR_NULL (error->message));
+      if (window)
+        _show_error_dialog (error, window);
+    }
+    g_error_free (error);
+    g_free (win_data);
+
+    return;
+  }
+
+  if (window) {
+    GtkFileLauncher *launcher = gtk_file_launcher_new (svg_file);
+
+#if GTK_CHECK_VERSION(4,12,0)
+    gtk_file_launcher_set_always_ask (launcher, TRUE);
+#endif
+
+    gtk_file_launcher_launch (launcher, window, NULL,
+        (GAsyncReadyCallback) _launch_pipeline_cb, win_data);
+    g_object_unref (launcher);
+  } else {
+    g_free (win_data);
+  }
+
+  g_object_unref (svg_file);
+}
+
+static void
+show_pipeline (GSimpleAction *action, GVariant *param, gpointer user_data)
+{
+  ClapperAppApplication *self = CLAPPER_APP_APPLICATION_CAST (user_data);
+  GtkApplication *gtk_app = GTK_APPLICATION (self);
+  GtkWindow *window;
+  ClapperAppWindowData *win_data;
+
+  window = gtk_application_get_active_window (gtk_app);
+
+  while (window && !CLAPPER_APP_IS_WINDOW (window))
+    window = gtk_window_get_transient_for (window);
+
+  if (G_UNLIKELY (window == NULL))
+    return;
+
+  if (self->cancellable) {
+    g_cancellable_cancel (self->cancellable);
+    g_object_unref (self->cancellable);
+  }
+  self->cancellable = g_cancellable_new ();
+
+  win_data = g_new (ClapperAppWindowData, 1);
+  win_data->app = self;
+  win_data->id = gtk_application_window_get_id (GTK_APPLICATION_WINDOW (window));
+
+  clapper_app_utils_create_pipeline_svg_file_async (
+      clapper_app_window_get_player (CLAPPER_APP_WINDOW (window)),
+      self->cancellable, (GAsyncReadyCallback) _show_pipeline_cb, win_data);
+}
+
 static void
 show_about (GSimpleAction *action, GVariant *param, gpointer user_data)
 {
@@ -714,6 +830,7 @@ clapper_app_application_constructed (GObject *object)
     { "clear-queue", clear_queue, NULL, NULL, NULL },
     { "new-window", new_window, NULL, NULL, NULL },
     { "info", show_info, NULL, NULL, NULL },
+    { "pipeline", show_pipeline, NULL, NULL, NULL },
     { "preferences", show_preferences, NULL, NULL, NULL },
     { "about", show_about, NULL, NULL, NULL },
   };
@@ -722,6 +839,7 @@ clapper_app_application_constructed (GObject *object)
     { "app.add-uri", { "<Control>u", NULL, NULL }},
     { "app.new-window", { "<Control>n", NULL, NULL }},
     { "app.info", { "<Control>i", NULL, NULL }},
+    { "app.pipeline", { "<Control><Shift>p", NULL, NULL }},
     { "app.preferences", { "<Control>comma", NULL, NULL }},
     { "app.about", { "F1", NULL, NULL }},
     { "win.toggle-fullscreen", { "F11", "f", NULL }},
@@ -756,6 +874,19 @@ clapper_app_application_constructed (GObject *object)
   G_OBJECT_CLASS (parent_class)->constructed (object);
 }
 
+static void
+clapper_app_application_dispose (GObject *object)
+{
+  ClapperAppApplication *self = CLAPPER_APP_APPLICATION_CAST (object);
+
+  if (self->cancellable) {
+    g_cancellable_cancel (self->cancellable);
+    g_clear_object (&self->cancellable);
+  }
+
+  G_OBJECT_CLASS (parent_class)->dispose (object);
+}
+
 static void
 clapper_app_application_finalize (GObject *object)
 {
@@ -779,6 +910,7 @@ clapper_app_application_class_init (ClapperAppApplicationClass *klass)
       "Clapper App Application");
 
   gobject_class->constructed = clapper_app_application_constructed;
+  gobject_class->dispose = clapper_app_application_dispose;
   gobject_class->finalize = clapper_app_application_finalize;
 
   gtk_application_class->window_removed = clapper_app_application_window_removed;