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-rw-r--r--extensions/image-properties/nautilus-image-properties-model.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/extensions/image-properties/nautilus-image-properties-model.c b/extensions/image-properties/nautilus-image-properties-model.c
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--- /dev/null
+++ b/extensions/image-properties/nautilus-image-properties-model.c
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+/* Copyright (C) 2004 Red Hat, Inc
+ * Copyright (c) 2007 Novell, Inc.
+ * Copyright (c) 2017 Thomas Bechtold <thomasbechtold@jpberlin.de>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Author: Alexander Larsson <alexl@redhat.com>
+ * XMP support by Hubert Figuiere <hfiguiere@novell.com>
+ */
+
+#include "nautilus-image-properties-model.h"
+
+#include <gexiv2/gexiv2.h>
+#include <glib/gi18n.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include <math.h>
+
+#define LOAD_BUFFER_SIZE 8192
+
+typedef struct
+{
+ GListStore *group_model;
+
+ GCancellable *cancellable;
+ GdkPixbufLoader *loader;
+ gboolean got_size;
+ gboolean pixbuf_still_loading;
+ unsigned char buffer[LOAD_BUFFER_SIZE];
+ int width;
+ int height;
+
+ GExiv2Metadata *md;
+ gboolean md_ready;
+} NautilusImagesPropertiesModel;
+
+static void
+nautilus_images_properties_model_free (NautilusImagesPropertiesModel *self)
+{
+ if (self->cancellable != NULL)
+ {
+ g_cancellable_cancel (self->cancellable);
+ g_clear_object (&self->cancellable);
+ }
+ g_free (self);
+}
+
+static void
+append_item (NautilusImagesPropertiesModel *self,
+ const char *name,
+ const char *value)
+{
+ g_autoptr (NautilusPropertiesItem) item = NULL;
+
+ item = nautilus_properties_item_new (name, value);
+ g_list_store_append (self->group_model, item);
+}
+
+static void
+nautilus_image_properties_model_init (NautilusImagesPropertiesModel *self)
+{
+ self->group_model = g_list_store_new (NAUTILUS_TYPE_PROPERTIES_ITEM);
+}
+
+static void
+append_basic_info (NautilusImagesPropertiesModel *self)
+{
+ GdkPixbufFormat *format;
+ GExiv2Orientation orientation;
+ int width;
+ int height;
+ g_autofree char *name = NULL;
+ g_autofree char *desc = NULL;
+ g_autofree char *value = NULL;
+
+ format = gdk_pixbuf_loader_get_format (self->loader);
+ name = gdk_pixbuf_format_get_name (format);
+ desc = gdk_pixbuf_format_get_description (format);
+ value = g_strdup_printf ("%s (%s)", name, desc);
+
+ append_item (self, _("Image Type"), value);
+
+ orientation = gexiv2_metadata_try_get_orientation (self->md, NULL);
+
+ if (orientation == GEXIV2_ORIENTATION_ROT_90
+ || orientation == GEXIV2_ORIENTATION_ROT_270
+ || orientation == GEXIV2_ORIENTATION_ROT_90_HFLIP
+ || orientation == GEXIV2_ORIENTATION_ROT_90_VFLIP)
+ {
+ width = self->height;
+ height = self->width;
+ }
+ else
+ {
+ width = self->width;
+ height = self->height;
+ }
+
+ g_free (value);
+ value = g_strdup_printf (ngettext ("%d pixel",
+ "%d pixels",
+ width),
+ width);
+
+ append_item (self, _("Width"), value);
+
+ g_free (value);
+ value = g_strdup_printf (ngettext ("%d pixel",
+ "%d pixels",
+ height),
+ height);
+
+ append_item (self, _("Height"), value);
+}
+
+static void
+append_gexiv2_tag (NautilusImagesPropertiesModel *self,
+ const char **tag_names,
+ const char *description)
+{
+ g_assert (tag_names != NULL);
+
+ for (const char **i = tag_names; *i != NULL; i++)
+ {
+ if (gexiv2_metadata_try_has_tag (self->md, *i, NULL))
+ {
+ g_autofree char *tag_value = NULL;
+
+ tag_value = gexiv2_metadata_try_get_tag_interpreted_string (self->md, *i, NULL);
+
+ if (description == NULL)
+ {
+ description = gexiv2_metadata_try_get_tag_description (*i, NULL);
+ }
+
+ /* don't add empty tags - try next one */
+ if (strlen (tag_value) > 0)
+ {
+ append_item (self, description, tag_value);
+ break;
+ }
+ }
+ }
+}
+
+static void
+append_gexiv2_info (NautilusImagesPropertiesModel *self)
+{
+ double longitude;
+ double latitude;
+ double altitude;
+
+ /* define tags and its alternatives */
+ const char *title[] = { "Xmp.dc.title", NULL };
+ const char *camera_brand[] = { "Exif.Image.Make", NULL };
+ const char *camera_model[] = { "Exif.Image.Model", "Exif.Image.UniqueCameraModel", NULL };
+ const char *created_on[] = { "Exif.Photo.DateTimeOriginal", "Xmp.xmp.CreateDate", "Exif.Image.DateTime", NULL };
+ const char *exposure_time[] = { "Exif.Photo.ExposureTime", NULL };
+ const char *aperture_value[] = { "Exif.Photo.ApertureValue", NULL };
+ const char *iso_speed_ratings[] = { "Exif.Photo.ISOSpeedRatings", "Xmp.exifEX.ISOSpeed", NULL };
+ const char *flash[] = { "Exif.Photo.Flash", NULL };
+ const char *metering_mode[] = { "Exif.Photo.MeteringMode", NULL };
+ const char *exposure_mode[] = { "Exif.Photo.ExposureMode", NULL };
+ const char *focal_length[] = { "Exif.Photo.FocalLength", NULL };
+ const char *software[] = { "Exif.Image.Software", NULL };
+ const char *description[] = { "Xmp.dc.description", "Exif.Photo.UserComment", NULL };
+ const char *subject[] = { "Xmp.dc.subject", NULL };
+ const char *creator[] = { "Xmp.dc.creator", "Exif.Image.Artist", NULL };
+ const char *rights[] = { "Xmp.dc.rights", NULL };
+ const char *rating[] = { "Xmp.xmp.Rating", NULL };
+
+ if (!self->md_ready)
+ {
+ return;
+ }
+
+ append_gexiv2_tag (self, camera_brand, _("Camera Brand"));
+ append_gexiv2_tag (self, camera_model, _("Camera Model"));
+ append_gexiv2_tag (self, exposure_time, _("Exposure Time"));
+ append_gexiv2_tag (self, exposure_mode, _("Exposure Program"));
+ append_gexiv2_tag (self, aperture_value, _("Aperture Value"));
+ append_gexiv2_tag (self, iso_speed_ratings, _("ISO Speed Rating"));
+ append_gexiv2_tag (self, flash, _("Flash Fired"));
+ append_gexiv2_tag (self, metering_mode, _("Metering Mode"));
+ append_gexiv2_tag (self, focal_length, _("Focal Length"));
+ append_gexiv2_tag (self, software, _("Software"));
+ append_gexiv2_tag (self, title, _("Title"));
+ append_gexiv2_tag (self, description, _("Description"));
+ append_gexiv2_tag (self, subject, _("Keywords"));
+ append_gexiv2_tag (self, creator, _("Creator"));
+ append_gexiv2_tag (self, created_on, _("Created On"));
+ append_gexiv2_tag (self, rights, _("Copyright"));
+ append_gexiv2_tag (self, rating, _("Rating"));
+
+ if (gexiv2_metadata_try_get_gps_info (self->md, &longitude, &latitude, &altitude, NULL))
+ {
+ g_autofree char *gps_coords = NULL;
+
+ gps_coords = g_strdup_printf ("%f° %s %f° %s (%.0f m)",
+ fabs (latitude),
+ /* Translators: "N" and "S" stand for
+ * north and south in GPS coordinates. */
+ latitude >= 0 ? _("N") : _("S"),
+ fabs (longitude),
+ /* Translators: "E" and "W" stand for
+ * east and west in GPS coordinates. */
+ longitude >= 0 ? _("E") : _("W"),
+ altitude);
+
+ append_item (self, _("Coordinates"), gps_coords);
+ }
+}
+
+static void
+load_finished (NautilusImagesPropertiesModel *self)
+{
+ if (self->loader != NULL)
+ {
+ gdk_pixbuf_loader_close (self->loader, NULL);
+ }
+
+ if (self->got_size)
+ {
+ append_basic_info (self);
+ append_gexiv2_info (self);
+ }
+ else
+ {
+ append_item (self, _("Oops! Something went wrong."), _("Failed to load image information"));
+ }
+
+ if (self->loader != NULL)
+ {
+ g_object_unref (self->loader);
+ self->loader = NULL;
+ }
+ self->md_ready = FALSE;
+ g_clear_object (&self->md);
+}
+
+static void
+file_close_callback (GObject *object,
+ GAsyncResult *res,
+ gpointer data)
+{
+ NautilusImagesPropertiesModel *self;
+ GInputStream *stream;
+
+ self = data;
+ stream = G_INPUT_STREAM (object);
+
+ g_input_stream_close_finish (stream, res, NULL);
+
+ g_clear_object (&self->cancellable);
+}
+
+static void
+file_read_callback (GObject *object,
+ GAsyncResult *res,
+ gpointer data)
+{
+ NautilusImagesPropertiesModel *self;
+ GInputStream *stream;
+ g_autoptr (GError) error = NULL;
+ gssize count_read;
+ gboolean done_reading;
+
+ self = data;
+ stream = G_INPUT_STREAM (object);
+ count_read = g_input_stream_read_finish (stream, res, &error);
+ done_reading = FALSE;
+
+ if (count_read > 0)
+ {
+ g_assert (count_read <= sizeof (self->buffer));
+
+ if (self->pixbuf_still_loading)
+ {
+ if (!gdk_pixbuf_loader_write (self->loader,
+ self->buffer,
+ count_read,
+ NULL))
+ {
+ self->pixbuf_still_loading = FALSE;
+ }
+ }
+
+ if (self->pixbuf_still_loading)
+ {
+ g_input_stream_read_async (G_INPUT_STREAM (stream),
+ self->buffer,
+ sizeof (self->buffer),
+ G_PRIORITY_DEFAULT,
+ self->cancellable,
+ file_read_callback,
+ self);
+ }
+ else
+ {
+ done_reading = TRUE;
+ }
+ }
+ else
+ {
+ /* either EOF, cancelled or an error occurred */
+ done_reading = TRUE;
+ }
+
+ if (error != NULL)
+ {
+ g_autofree char *uri = NULL;
+
+ uri = g_file_get_uri (G_FILE (object));
+
+ g_warning ("Error reading %s: %s", uri, error->message);
+ }
+
+ if (done_reading)
+ {
+ load_finished (self);
+ g_input_stream_close_async (stream,
+ G_PRIORITY_DEFAULT,
+ self->cancellable,
+ file_close_callback,
+ self);
+ }
+}
+
+static void
+size_prepared_callback (GdkPixbufLoader *loader,
+ int width,
+ int height,
+ gpointer callback_data)
+{
+ NautilusImagesPropertiesModel *self;
+
+ self = callback_data;
+
+ self->height = height;
+ self->width = width;
+ self->got_size = TRUE;
+ self->pixbuf_still_loading = FALSE;
+}
+
+typedef struct
+{
+ NautilusImagesPropertiesModel *self;
+ NautilusFileInfo *file_info;
+} FileOpenData;
+
+static void
+file_open_callback (GObject *object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ g_autofree FileOpenData *data = NULL;
+ NautilusImagesPropertiesModel *self;
+ GFile *file;
+ g_autofree char *uri = NULL;
+ g_autoptr (GError) error = NULL;
+ g_autoptr (GFileInputStream) stream = NULL;
+
+ data = user_data;
+ self = data->self;
+ file = G_FILE (object);
+ uri = g_file_get_uri (file);
+ stream = g_file_read_finish (file, res, &error);
+ if (stream != NULL)
+ {
+ g_autofree char *mime_type = NULL;
+
+ mime_type = nautilus_file_info_get_mime_type (data->file_info);
+
+ self->loader = gdk_pixbuf_loader_new_with_mime_type (mime_type, &error);
+ if (error != NULL)
+ {
+ g_warning ("Error creating loader for %s: %s", uri, error->message);
+ }
+ self->pixbuf_still_loading = TRUE;
+ self->width = 0;
+ self->height = 0;
+
+ g_signal_connect (self->loader,
+ "size-prepared",
+ G_CALLBACK (size_prepared_callback),
+ self);
+
+ g_input_stream_read_async (G_INPUT_STREAM (stream),
+ self->buffer,
+ sizeof (self->buffer),
+ G_PRIORITY_DEFAULT,
+ self->cancellable,
+ file_read_callback,
+ self);
+ }
+ else
+ {
+ g_warning ("Error reading %s: %s", uri, error->message);
+ load_finished (self);
+ }
+}
+
+static void
+nautilus_image_properties_model_load_from_file_info (NautilusImagesPropertiesModel *self,
+ NautilusFileInfo *file_info)
+{
+ g_autofree char *uri = NULL;
+ g_autoptr (GFile) file = NULL;
+ g_autofree char *path = NULL;
+ FileOpenData *data;
+
+ g_return_if_fail (file_info != NULL);
+
+ self->cancellable = g_cancellable_new ();
+
+ uri = nautilus_file_info_get_uri (file_info);
+ file = g_file_new_for_uri (uri);
+ path = g_file_get_path (file);
+
+ /* gexiv2 metadata init */
+ self->md_ready = gexiv2_initialize ();
+ if (!self->md_ready)
+ {
+ g_warning ("Unable to initialize gexiv2");
+ }
+ else
+ {
+ self->md = gexiv2_metadata_new ();
+ if (path != NULL)
+ {
+ g_autoptr (GError) error = NULL;
+
+ if (!gexiv2_metadata_open_path (self->md, path, &error))
+ {
+ g_warning ("gexiv2 metadata not supported for '%s': %s", path, error->message);
+ self->md_ready = FALSE;
+ }
+ }
+ else
+ {
+ self->md_ready = FALSE;
+ }
+ }
+
+ data = g_new0 (FileOpenData, 1);
+
+ data->self = self;
+ data->file_info = file_info;
+
+ g_file_read_async (file,
+ G_PRIORITY_DEFAULT,
+ self->cancellable,
+ file_open_callback,
+ data);
+}
+
+NautilusPropertiesModel *
+nautilus_image_properties_model_new (NautilusFileInfo *file_info)
+{
+ NautilusImagesPropertiesModel *self;
+ NautilusPropertiesModel *model;
+
+ self = g_new0 (NautilusImagesPropertiesModel, 1);
+
+ nautilus_image_properties_model_init (self);
+ nautilus_image_properties_model_load_from_file_info (self, file_info);
+
+ model = nautilus_properties_model_new (_("Image Properties"),
+ G_LIST_MODEL (self->group_model));
+
+ g_object_weak_ref (G_OBJECT (model),
+ (GWeakNotify) nautilus_images_properties_model_free,
+ self);
+
+ return model;
+}
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