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, 79 insertions, 0 deletions

diff --git a/libnautilus-extension/nautilus-property-page-model-provider.h b/libnautilus-extension/nautilus-property-page-model-provider.h
new file mode 100644
index 000000000..750a4ca45
--- /dev/null
+++ b/libnautilus-extension/nautilus-property-page-model-provider.h
@@ -0,0 +1,79 @@
+/*
+ *  nautilus-property-page-provider.h - Interface for Nautilus extensions
+ *                                      that provide property pages.
+ *
+ *  Copyright (C) 2003 Novell, Inc.
+ *  Copyright (C) 2018 Red Hat, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ *  Author:  Dave Camp <dave@ximian.com>
+ *           Carlos Soriano <csoriano@redhat.com>
+ *
+ */
+
+/* This interface is implemented by Nautilus extensions that want to
+ * add property page to property dialogs.  Extensions are called when
+ * Nautilus needs property pages for a selection.  They are passed a
+ * list of NautilusFileInfo objects for which information should
+ * be displayed  */
+
+#pragma once
+
+#if !defined (NAUTILUS_EXTENSION_H) && !defined (NAUTILUS_COMPILATION)
+#warning "Only <nautilus-extension.h> should be included directly."
+#endif
+
+#include <glib-object.h>
+/* These should be removed at some point. */
+#include "nautilus-property-page-model.h"
+#include "nautilus-extension-types.h"
+#include "nautilus-file-info.h"
+
+
+G_BEGIN_DECLS
+
+#define NAUTILUS_TYPE_PROPERTY_PAGE_MODEL_PROVIDER (nautilus_property_page_model_provider_get_type ())
+
+G_DECLARE_INTERFACE (NautilusPropertyPageModelProvider, nautilus_property_page_model_provider,
+                     NAUTILUS, PROPERTY_PAGE_MODEL_PROVIDER,
+                     GObject)
+
+/**
+ * NautilusPropertyPageModelProvider:
+ * @g_iface: The parent interface.
+ * @get_model: Returns #NautilusPropertyPageModel.
+ *   See nautilus_property_page_provider_get_model() for details.
+ *
+ * Interface for extensions to provide additional a property page.
+ */
+struct _NautilusPropertyPageModelProviderInterface
+{
+    GTypeInterface parent;
+
+    NautilusPropertyPageModel *(*get_model) (NautilusPropertyPageModelProvider *provider);
+
+    void (*set_files) (NautilusPropertyPageModelProvider *provider,
+                       GList                             *files);
+    gboolean (*supports_files) (NautilusPropertyPageModelProvider *provider);
+};
+
+/* Interface Functions */
+NautilusPropertyPageModel *nautilus_property_page_model_provider_get_model (NautilusPropertyPageModelProvider *provider);
+
+void nautilus_property_page_model_provider_set_files (NautilusPropertyPageModelProvider *provider,
+                                                      GList                             *files);
+gboolean nautilus_property_page_model_provider_supports_files (NautilusPropertyPageModelProvider *provider);
+
+G_END_DECLS