Added skeleton files for the desktop thumbnailer plugin.

This plugin will add desktop thumbnailer support for tumbler see:
https://bugzilla.xfce.org/show_bug.cgi?id=7475

7 files changed, 493 insertions, 0 deletions

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index f2c9f5f..f2b5307 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -27,4 +27,5 @@ SUBDIRS =								\
 	odf-thumbnailer							\
 	poppler-thumbnailer						\
 	raw-thumbnailer							\
+	desktop-thumbnailer						\
 	xdg-cache
diff --git a/plugins/desktop-thumbnailer/Makefile.am b/plugins/desktop-thumbnailer/Makefile.am
new file mode 100644
index 0000000..ecb5adf
--- /dev/null
+++ b/plugins/desktop-thumbnailer/Makefile.am
@@ -0,0 +1,44 @@
+if TUMBLER_DESKTOP_THUMBNAILER
+
+tumbler_plugindir = $(libdir)/tumbler-$(TUMBLER_VERSION_API)/plugins
+tumbler_plugin_LTLIBRARIES =						\
+	tumbler-desktop-thumbnailer.la
+
+tumbler_desktop_thumbnailer_la_SOURCES =					\
+	desktop-thumbnailer-plugin.c					\
+	desktop-thumbnailer-provider.c					\
+	desktop-thumbnailer-provider.h					\
+	desktop-thumbnailer.c						\
+	desktop-thumbnailer.h
+
+tumbler_desktop_thumbnailer_la_CFLAGS =					\
+	-I$(top_builddir)						\
+	-I$(top_builddir)/plugins					\
+	-I$(top_srcdir)							\
+	-I$(top_srcdir)/plugins						\
+	-DG_LOG_DOMAIN=\"tumbler-desktop-thumbnailer\"			\
+	-DPACKAGE_LOCALE_DIR=\"$(localedir)\"				\
+	$(GDK_PIXBUF_CFLAGS)						\
+	$(GIO_CFLAGS)							\
+	$(GLIB_CFLAGS)							\
+	$(PLATFORM_CFLAGS)						\
+	$(PLATFORM_CPPFLAGS)
+
+tumbler_desktop_thumbnailer_la_LDFLAGS =					\
+	-avoid-version							\
+	-export-dynamic							\
+	-module								\
+	$(PLATFORM_LDFLAGS)
+
+tumbler_desktop_thumbnailer_la_LIBADD =					\
+	$(top_builddir)/tumbler/libtumbler-$(TUMBLER_VERSION_API).la	\
+	$(GDK_PIXBUF_LIBS)						\
+	$(GIO_LIBS)							\
+	$(GLIB_LIBS)							\
+	-lm
+
+tumbler_desktop_thumbnailer_la_DEPENDENCIES =				\
+	$(top_builddir)/tumbler/libtumbler-$(TUMBLER_VERSION_API).la
+
+
+endif
\ No newline at end of file
diff --git a/plugins/desktop-thumbnailer/desktop-thumbnailer-plugin.c b/plugins/desktop-thumbnailer/desktop-thumbnailer-plugin.c
new file mode 100644
index 0000000..d4810d0
--- /dev/null
+++ b/plugins/desktop-thumbnailer/desktop-thumbnailer-plugin.c
@@ -0,0 +1,89 @@
+/*
+ *
+ * Copyright (c) 2017 Ali Abdallah <ali@xfce.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib-object.h>
+
+#include <tumbler/tumbler.h>
+
+#include <desktop-thumbnailer/desktop-thumbnailer-provider.h>
+#include <desktop-thumbnailer/desktop-thumbnailer.h>
+
+
+G_MODULE_EXPORT void tumbler_plugin_initialize (TumblerProviderPlugin *plugin);
+G_MODULE_EXPORT void tumbler_plugin_shutdown   (void);
+G_MODULE_EXPORT void tumbler_plugin_get_types  (const GType          **types,
+                                                gint                  *n_types);
+
+
+
+static GType type_list[1];
+
+
+
+void
+tumbler_plugin_initialize (TumblerProviderPlugin *plugin)
+{
+  const gchar *mismatch;
+
+  /* verify that the tumbler versions are compatible */
+  mismatch = tumbler_check_version (TUMBLER_MAJOR_VERSION, TUMBLER_MINOR_VERSION,
+                                    TUMBLER_MICRO_VERSION);
+  if (G_UNLIKELY (mismatch != NULL))
+    {
+      g_warning (_("Version mismatch: %s"), mismatch);
+      return;
+    }
+
+#ifdef DEBUG
+  g_print ("Initializing the Tumbler Desktop Thumbnailer plugin\n");
+#endif
+
+  /* register the types provided by this plugin */
+  desktop_thumbnailer_register (plugin);
+  desktop_thumbnailer_provider_register (plugin);
+
+  /* set up the plugin provider type list */
+  type_list[0] = TYPE_DESKTOP_THUMBNAILER_PROVIDER;
+}
+
+
+void
+tumbler_plugin_shutdown (void)
+{
+#ifdef DEBUG
+  g_print ("Shutting down the Tumbler GStreamer Thumbnailer plugin\n");
+#endif
+}
+
+
+
+void
+tumbler_plugin_get_types (const GType **types,
+                          gint         *n_types)
+{
+  *types = type_list;
+  *n_types = G_N_ELEMENTS (type_list);
+}
diff --git a/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.c b/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.c
new file mode 100644
index 0000000..8ea95c2
--- /dev/null
+++ b/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2017 Ali Abdallah <ali@xfce.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <glib.h>
+#include <glib-object.h>
+
+
+#include <tumbler/tumbler.h>
+
+#include <desktop-thumbnailer/desktop-thumbnailer-provider.h>
+#include <desktop-thumbnailer/desktop-thumbnailer.h>
+
+
+
+static void   desktop_thumbnailer_provider_thumbnailer_provider_init (TumblerThumbnailerProviderIface *iface);
+static GList *desktop_thumbnailer_provider_get_thumbnailers          (TumblerThumbnailerProvider      *provider);
+
+
+
+struct _DesktopThumbnailerProviderClass
+{
+  GObjectClass __parent__;
+};
+
+struct _DesktopThumbnailerProvider
+{
+  GObject __parent__;
+};
+
+
+
+G_DEFINE_DYNAMIC_TYPE_EXTENDED (DesktopThumbnailerProvider,
+                                desktop_thumbnailer_provider,
+                                G_TYPE_OBJECT,
+                                0,
+                                TUMBLER_ADD_INTERFACE (TUMBLER_TYPE_THUMBNAILER_PROVIDER,
+                                                       desktop_thumbnailer_provider_thumbnailer_provider_init));
+
+
+
+void
+desktop_thumbnailer_provider_register (TumblerProviderPlugin *plugin)
+{
+  desktop_thumbnailer_provider_register_type (G_TYPE_MODULE (plugin));
+}
+
+
+
+static void
+desktop_thumbnailer_provider_class_init (DesktopThumbnailerProviderClass *klass)
+{
+}
+
+
+
+static void
+desktop_thumbnailer_provider_class_finalize (DesktopThumbnailerProviderClass *klass)
+{
+}
+
+
+
+static void
+desktop_thumbnailer_provider_thumbnailer_provider_init (TumblerThumbnailerProviderIface *iface)
+{
+  iface->get_thumbnailers = desktop_thumbnailer_provider_get_thumbnailers;
+}
+
+
+
+static void
+desktop_thumbnailer_provider_init (DesktopThumbnailerProvider *provider)
+{
+}
+
+
+
+static GList *
+desktop_thumbnailer_provider_get_thumbnailers (TumblerThumbnailerProvider *provider)
+{
+  /* This list is mainly from Totem. Generating a list from
+   * GStreamer isn't realistic, so we have to hardcode it. */
+  /* See https://git.gnome.org/browse/totem/tree/data/mime-type-list.txt */
+  static const char *mime_types[] = {
+	  "dummy",
+	  NULL
+  };
+
+  DesktopThumbnailer    *thumbnailer;
+  GError                *error = NULL;
+  GStrv                  uri_schemes;
+
+  uri_schemes = tumbler_util_get_supported_uri_schemes ();
+
+  thumbnailer = g_object_new (TYPE_DESKTOP_THUMBNAILER,
+                              "uri-schemes", uri_schemes,
+                              "mime-types", mime_types,
+                              NULL);
+
+  g_strfreev (uri_schemes);
+
+  return g_list_append (NULL, thumbnailer);
+}
diff --git a/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.h b/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.h
new file mode 100644
index 0000000..db10a46
--- /dev/null
+++ b/plugins/desktop-thumbnailer/desktop-thumbnailer-provider.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2017 Ali Abdallah <ali@xfce.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __DESKTOP_THUMBNAILER_PROVIDER_H__
+#define __DESKTOP_THUMBNAILER_PROVIDER_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define TYPE_DESKTOP_THUMBNAILER_PROVIDER            (desktop_thumbnailer_provider_get_type ())
+#define DESKTOP_THUMBNAILER_PROVIDER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_DESKTOP_THUMBNAILER_PROVIDER, DesktopThumbnailerProvider))
+#define DESKTOP_THUMBNAILER_PROVIDER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_DESKTOP_THUMBNAILER_PROVIDER, DesktopThumbnailerProviderClass))
+#define IS_DESKTOP_THUMBNAILER_PROVIDER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_DESKTOP_THUMBNAILER_PROVIDER))
+#define IS_DESKTOP_THUMBNAILER_PROVIDER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_DESKTOP_THUMBNAILER_PROVIDER)
+#define DESKTOP_THUMBNAILER_PROVIDER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_DESKTOP_THUMBNAILER_PROVIDER, DesktopThumbnailerProviderClass))
+
+typedef struct _DesktopThumbnailerProviderClass DesktopThumbnailerProviderClass;
+typedef struct _DesktopThumbnailerProvider      DesktopThumbnailerProvider;
+
+GType desktop_thumbnailer_provider_get_type (void) G_GNUC_CONST;
+void  desktop_thumbnailer_provider_register (TumblerProviderPlugin *plugin);
+
+G_END_DECLS
+
+#endif /* !__DESKTOP_THUMBNAILER_PROVIDER_H__ */
diff --git a/plugins/desktop-thumbnailer/desktop-thumbnailer.c b/plugins/desktop-thumbnailer/desktop-thumbnailer.c
new file mode 100644
index 0000000..7f025fe
--- /dev/null
+++ b/plugins/desktop-thumbnailer/desktop-thumbnailer.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2017 Ali Abdallah <ali@xfce.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <math.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib-object.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include <gio/gio.h>
+
+
+#include <tumbler/tumbler.h>
+
+#include <desktop-thumbnailer/desktop-thumbnailer.h>
+
+
+
+static void desktop_thumbnailer_create   (TumblerAbstractThumbnailer *thumbnailer,
+										  GCancellable               *cancellable,
+										  TumblerFileInfo            *info);
+
+
+
+struct _DesktopThumbnailerClass
+{
+  TumblerAbstractThumbnailerClass __parent__;
+};
+
+struct _DesktopThumbnailer
+{
+  TumblerAbstractThumbnailer __parent__;
+};
+
+
+
+G_DEFINE_DYNAMIC_TYPE (DesktopThumbnailer,
+                       desktop_thumbnailer,
+                       TUMBLER_TYPE_ABSTRACT_THUMBNAILER);
+
+
+
+void
+desktop_thumbnailer_register (TumblerProviderPlugin *plugin)
+{
+  desktop_thumbnailer_register_type (G_TYPE_MODULE (plugin));
+}
+
+
+
+static void
+desktop_thumbnailer_class_init (DesktopThumbnailerClass *klass)
+{
+  TumblerAbstractThumbnailerClass *abstractthumbnailer_class;
+
+  abstractthumbnailer_class = TUMBLER_ABSTRACT_THUMBNAILER_CLASS (klass);
+  abstractthumbnailer_class->create = desktop_thumbnailer_create;
+}
+
+
+
+static void
+desktop_thumbnailer_class_finalize (DesktopThumbnailerClass *klass)
+{
+}
+
+
+
+static void
+desktop_thumbnailer_init (DesktopThumbnailer *thumbnailer)
+{
+}
+
+
+static void
+desktop_thumbnailer_create (TumblerAbstractThumbnailer *thumbnailer,
+                        GCancellable               *cancellable,
+                        TumblerFileInfo            *info)
+{
+  TumblerThumbnail *thumbnail;
+  const gchar      *uri;
+  GFile            *file;
+  GError           *error = NULL;
+  gchar            *path;
+  GdkPixbuf        *pixbuf = NULL;
+  TumblerImageData  data;
+
+  g_return_if_fail (IS_DESKTOP_THUMBNAILER (thumbnailer));
+  g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
+  g_return_if_fail (TUMBLER_IS_FILE_INFO (info));
+
+  /* do nothing if cancelled */
+  if (g_cancellable_is_cancelled (cancellable))
+    return;
+
+  uri = tumbler_file_info_get_uri (info);
+  file = g_file_new_for_uri (uri);
+
+
+  thumbnail = tumbler_file_info_get_thumbnail (info);
+
+  if (pixbuf != NULL)
+    {
+      data.data = gdk_pixbuf_get_pixels (pixbuf);
+      data.has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
+      data.bits_per_sample = gdk_pixbuf_get_bits_per_sample (pixbuf);
+      data.width = gdk_pixbuf_get_width (pixbuf);
+      data.height = gdk_pixbuf_get_height (pixbuf);
+      data.rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+      data.colorspace = (TumblerColorspace) gdk_pixbuf_get_colorspace (pixbuf);
+
+      tumbler_thumbnail_save_image_data (thumbnail, &data,
+                                         tumbler_file_info_get_mtime (info),
+                                         NULL, &error);
+
+      g_object_unref (pixbuf);
+    }
+
+  if (error != NULL)
+    {
+      g_signal_emit_by_name (thumbnailer, "error", uri, error->code, error->message);
+      g_error_free (error);
+    }
+  else
+    {
+      g_signal_emit_by_name (thumbnailer, "ready", uri);
+    }
+
+  g_object_unref (thumbnail);
+}
diff --git a/plugins/desktop-thumbnailer/desktop-thumbnailer.h b/plugins/desktop-thumbnailer/desktop-thumbnailer.h
new file mode 100644
index 0000000..af0ef0c
--- /dev/null
+++ b/plugins/desktop-thumbnailer/desktop-thumbnailer.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2017 Ali Abdallah <ali@xfce.org>
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __DESKTOP_THUMBNAILER_H__
+#define __DESKTOP_THUMBNAILER_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define TYPE_DESKTOP_THUMBNAILER            (desktop_thumbnailer_get_type ())
+#define DESKTOP_THUMBNAILER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), TYPE_DESKTOP_THUMBNAILER, DesktopThumbnailer))
+#define DESKTOP_THUMBNAILER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), TYPE_DESKTOP_THUMBNAILER, DesktopThumbnailerClass))
+#define IS_DESKTOP_THUMBNAILER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TYPE_DESKTOP_THUMBNAILER))
+#define IS_DESKTOP_THUMBNAILER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TYPE_DESKTOP_THUMBNAILER)
+#define DESKTOP_THUMBNAILER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), TYPE_DESKTOP_THUMBNAILER, DesktopThumbnailerClass))
+
+typedef struct _DesktopThumbnailerClass   DesktopThumbnailerClass;
+typedef struct _DesktopThumbnailer        DesktopThumbnailer;
+
+GType desktop_thumbnailer_get_type (void) G_GNUC_CONST;
+void  desktop_thumbnailer_register (TumblerProviderPlugin *plugin);
+
+G_END_DECLS
+
+#endif /* !__DESKTOP_THUMBNAILER_H__ */