[gnome-photos] utils: Add photos_utils_queue_thumbnail_job_for_file_async

[Debarshi Ray <debarshir src gnome org>]

commit ab59219acdb5db2f4b9ed7d85a3e05ec958c8ecb
Author: Debarshi Ray <debarshir gnome org>
Date:   Sun Jul 15 03:38:14 2012 +0200

    utils: Add photos_utils_queue_thumbnail_job_for_file_async
    
    Added gnome-desktop-3.0 to the list of build requirements.

 configure.ac       |    3 ++
 src/Makefile.am    |    2 +
 src/photos-utils.c |   72 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/photos-utils.h |    8 ++++++
 4 files changed, 85 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index bd6b497..a8a4aaf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,6 +47,9 @@ PKG_CHECK_MODULES(GDK_PIXBUF, [gdk-pixbuf-2.0])
 PKG_CHECK_MODULES(GLIB, [glib-2.0 >= $GLIB_MIN_VERSION])
 PKG_CHECK_MODULES(GIO, [gio-2.0])
 
+PKG_CHECK_MODULES(GNOME_DESKTOP, [gnome-desktop-3.0])
+AC_DEFINE([GNOME_DESKTOP_USE_UNSTABLE_API], [], [We are aware that GNOME_DESKTOP's API can change])
+
 PKG_CHECK_MODULES(GOA, [goa-1.0])
 AC_DEFINE([GOA_API_IS_SUBJECT_TO_CHANGE], [], [We are aware that GOA's API can change])
 
diff --git a/src/Makefile.am b/src/Makefile.am
index 8dae625..6dcd2e9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -103,6 +103,7 @@ AM_CPPFLAGS = \
 	$(GDK_PIXBUF_CFLAGS) \
 	$(GIO_CFLAGS) \
 	$(GLIB_CFLAGS) \
+	$(GNOME_DESKTOP_CFLAGS) \
 	$(GOA_CFLAGS) \
 	$(GTK_CFLAGS) \
 	$(TRACKER_CFLAGS) \
@@ -116,6 +117,7 @@ gnome_photos_LDADD = \
 	$(GDK_PIXBUF_LIBS) \
 	$(GIO_LIBS) \
 	$(GLIB_LIBS) \
+	$(GNOME_DESKTOP_LIBS) \
 	$(GOA_LIBS) \
 	$(GTK_LIBS) \
 	$(TRACKER_LIBS) \
diff --git a/src/photos-utils.c b/src/photos-utils.c
index da25f78..97a4c8d 100644
--- a/src/photos-utils.c
+++ b/src/photos-utils.c
@@ -24,6 +24,7 @@
 #include <string.h>
 
 #include <glib.h>
+#include <libgnome-desktop/gnome-desktop-thumbnail.h>
 
 #include "gd-main-view.h"
 #include "photos-utils.h"
@@ -37,6 +38,56 @@ photos_utils_alpha_gtk_widget (GtkWidget *widget)
 }
 
 
+static gboolean
+photos_utils_create_thumbnail (GIOSchedulerJob *job, GCancellable *cancellable, gpointer user_data)
+{
+  GSimpleAsyncResult *result = user_data;
+  GFile *file = G_FILE (g_async_result_get_source_object (G_ASYNC_RESULT (result)));
+  GnomeDesktopThumbnailFactory *factory;
+  GFileInfo *info;
+  const gchar *attributes = G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE","G_FILE_ATTRIBUTE_TIME_MODIFIED;
+  gchar *uri;
+  GdkPixbuf *pixbuf;
+  guint64 mtime;
+
+  uri = g_file_get_uri (file);
+  info = g_file_query_info (file, attributes, G_FILE_QUERY_INFO_NONE, NULL, NULL);
+
+  /* we don't care about reporting errors here, just fail the
+   * thumbnail.
+   */
+  if (info == NULL)
+    {
+      g_simple_async_result_set_op_res_gboolean (result, FALSE);
+      goto out;
+    }
+
+  mtime = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
+
+  factory = gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_NORMAL);
+  pixbuf = gnome_desktop_thumbnail_factory_generate_thumbnail (factory, uri, g_file_info_get_content_type (info));
+
+  if (pixbuf != NULL)
+    {
+      gnome_desktop_thumbnail_factory_save_thumbnail (factory, pixbuf, uri, (time_t) mtime);
+      g_simple_async_result_set_op_res_gboolean (result, TRUE);
+    }
+  else
+    g_simple_async_result_set_op_res_gboolean (result, FALSE);
+
+  g_object_unref (info);
+  g_object_unref (file);
+  g_object_unref (factory);
+  g_clear_object (&pixbuf);
+
+ out:
+  g_simple_async_result_complete_in_idle (result);
+  g_object_unref (result);
+
+  return FALSE;
+}
+
+
 static gchar *
 photos_utils_filename_get_extension_offset (const gchar *filename)
 {
@@ -104,3 +155,24 @@ photos_utils_get_urns_from_paths (GList *paths, GtkTreeModel *model)
 
   return g_list_reverse (urns);
 }
+
+
+void
+photos_utils_queue_thumbnail_job_for_file_async (GFile *file, GAsyncReadyCallback callback, gpointer user_data)
+{
+  GSimpleAsyncResult *result;
+
+  result = g_simple_async_result_new (G_OBJECT (file),
+                                      callback,
+                                      user_data,
+                                      photos_utils_queue_thumbnail_job_for_file_async);
+  g_io_scheduler_push_job (photos_utils_create_thumbnail, result, NULL, G_PRIORITY_DEFAULT, NULL);
+}
+
+
+gboolean
+photos_utils_queue_thumbnail_job_for_file_finish (GAsyncResult *res)
+{
+  GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
+  return g_simple_async_result_get_op_res_gboolean (simple);
+}
diff --git a/src/photos-utils.h b/src/photos-utils.h
index 24e90c5..88c2341 100644
--- a/src/photos-utils.h
+++ b/src/photos-utils.h
@@ -21,6 +21,7 @@
 #ifndef PHOTOS_UTILS_H
 #define PHOTOS_UTILS_H
 
+#include <gio/gio.h>
 #include <glib.h>
 #include <gtk/gtk.h>
 
@@ -32,6 +33,13 @@ gchar           *photos_utils_filename_strip_extension    (const gchar *filename
 
 GList           *photos_utils_get_urns_from_paths         (GList *paths, GtkTreeModel *model);
 
+void             photos_utils_queue_thumbnail_job_for_file_async (GFile *file,
+                                                                  GAsyncReadyCallback callback,
+                                                                  gpointer user_data);
+
+gboolean         photos_utils_queue_thumbnail_job_for_file_finish (GAsyncResult *res);
+
+
 G_END_DECLS
 
 #endif /* PHOTOS_UTILS_H */