general: Make property extensions gtk version independentnew-properties-extension

Nautilus property extensions to add property pages to the property
dialog was providing a GtkWidget to be modified by extensions.

This makes the extension need to target a specific gtk version, which
with the new gtk versioning might be hard to provide, and it's quite a
bad practice since it requires everyone to be on top of any gtk update.
This is currently holding the work for porting Nautilus to gtk4, since
the Totem extension depends on us having the same gtk+ version, which is
unlikely.

This work makes the extension for providing property extensions not
depend on gtk by providing a plain struct to be filled with data that
later on Nautilus will layout on the UI.

See https://gitlab.gnome.org/GNOME/nautilus/issues/276

1 files changed, 30 insertions, 0 deletions

diff --git a/extensions/image-properties/nautilus-image-properties-page-model-provider.h b/extensions/image-properties/nautilus-image-properties-page-model-provider.h
new file mode 100644
index 000000000..f25449209
--- /dev/null
+++ b/extensions/image-properties/nautilus-image-properties-page-model-provider.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 2018 Ernestas Kulik <ernestask@gnome.org>
+ *
+ * This file is part of Nautilus.
+ *
+ * Nautilus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Nautilus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Nautilus.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <glib-object.h>
+
+#define NAUTILUS_TYPE_IMAGE_PROPERTIES_PAGE_MODEL_PROVIDER (nautilus_image_properties_page_model_provider_get_type ())
+
+G_DECLARE_FINAL_TYPE (NautilusImagePropertiesPageModelProvider,
+                      nautilus_image_properties_page_model_provider,
+                      NAUTILUS, IMAGE_PROPERTIES_PAGE_MODEL_PROVIDER,
+                      GObject)
+
+void nautilus_image_properties_page_model_provider_load (GTypeModule *module);