mirror of https://github.com/GNOME/gimp.git
680 lines
22 KiB
C
680 lines
22 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* metadata.c
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* Copyright (C) 2013 Hartmut Kuhse
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* Copyright (C) 2016 Ben Touchette
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include <gexiv2/gexiv2.h>
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "libgimp/stdplugins-intl.h"
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#include "metadata-tags.h"
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#define PLUG_IN_PROC "plug-in-metadata-viewer"
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#define PLUG_IN_BINARY "metadata-viewer"
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#define PLUG_IN_ROLE "gimp-metadata"
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#define EXIF_PREFIX "Exif."
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#define IPTC_PREFIX "Iptc."
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#define XMP_PREFIX "Xmp."
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/* The length at which to truncate tag values, in characters. */
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#define TAG_VALUE_MAX_SIZE 1024
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/* The length at which to truncate raw data (i.e., tag values
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* of type "Byte" or "Undefined"), in bytes.
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*/
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#define RAW_DATA_MAX_SIZE 16
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enum
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{
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C_XMP_TAG = 0,
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C_XMP_VALUE,
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NUM_XMP_COLS
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};
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enum
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{
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C_EXIF_TAG = 0,
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C_EXIF_VALUE,
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NUM_EXIF_COLS
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};
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enum
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{
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C_IPTC_TAG = 0,
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C_IPTC_VALUE,
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NUM_IPTC_COLS
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};
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typedef struct _Metadata Metadata;
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typedef struct _MetadataClass MetadataClass;
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struct _Metadata
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{
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GimpPlugIn parent_instance;
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};
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struct _MetadataClass
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{
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GimpPlugInClass parent_class;
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};
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#define METADATA_TYPE (metadata_get_type ())
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#define METADATA (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), METADATA_TYPE, Metadata))
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GType metadata_get_type (void) G_GNUC_CONST;
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static GList * metadata_query_procedures (GimpPlugIn *plug_in);
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static GimpProcedure * metadata_create_procedure (GimpPlugIn *plug_in,
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const gchar *name);
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static GimpValueArray * metadata_run (GimpProcedure *procedure,
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const GimpValueArray *args,
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gpointer run_data);
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static gboolean metadata_viewer_dialog (GimpImage *image,
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GimpMetadata *g_metadata,
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GError **error);
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static void metadata_dialog_set_metadata (GExiv2Metadata *metadata,
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GtkBuilder *builder);
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static void metadata_dialog_append_tags (GExiv2Metadata *metadata,
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gchar **tags,
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GtkListStore *store,
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gint tag_column,
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gint value_column,
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gboolean load_iptc);
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static void metadata_dialog_add_tag (GtkListStore *store,
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GtkTreeIter iter,
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gint tag_column,
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gint value_column,
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const gchar *tag,
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const gchar *value);
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static void metadata_dialog_add_translated_tag (GExiv2Metadata *metadata,
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GtkListStore *store,
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GtkTreeIter iter,
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gint tag_column,
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gint value_column,
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const gchar *tag);
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static gchar * metadata_interpret_user_comment (gchar *comment);
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static gchar * metadata_dialog_format_tag_value (GExiv2Metadata *metadata,
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const gchar *tag,
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gboolean truncate);
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static gchar * metadata_format_string_value (const gchar *value,
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gboolean truncate);
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static inline gboolean metadata_tag_is_string (const gchar *tag);
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G_DEFINE_TYPE (Metadata, metadata, GIMP_TYPE_PLUG_IN)
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GIMP_MAIN (METADATA_TYPE)
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static void
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metadata_class_init (MetadataClass *klass)
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{
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GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
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plug_in_class->query_procedures = metadata_query_procedures;
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plug_in_class->create_procedure = metadata_create_procedure;
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}
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static void
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metadata_init (Metadata *metadata)
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{
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}
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static GList *
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metadata_query_procedures (GimpPlugIn *plug_in)
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{
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return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
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}
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static GimpProcedure *
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metadata_create_procedure (GimpPlugIn *plug_in,
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const gchar *name)
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{
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GimpProcedure *procedure = NULL;
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if (! strcmp (name, PLUG_IN_PROC))
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{
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procedure = gimp_procedure_new (plug_in, name,
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GIMP_PDB_PROC_TYPE_PLUGIN,
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metadata_run, NULL, NULL);
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gimp_procedure_set_image_types (procedure, "*");
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gimp_procedure_set_menu_label (procedure, N_("_View Metadata"));
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gimp_procedure_add_menu_path (procedure, "<Image>/Image/Metadata");
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gimp_procedure_set_documentation (procedure,
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N_("View metadata (Exif, IPTC, XMP)"),
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"View metadata information attached "
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"to the current image. This can "
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"include Exif, IPTC and/or XMP "
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"information.",
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name);
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gimp_procedure_set_attribution (procedure,
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"Hartmut Kuhse, Michael Natterer, "
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"Ben Touchette",
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"Hartmut Kuhse, Michael Natterer, "
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"Ben Touchette",
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"2013, 2017");
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GIMP_PROC_ARG_ENUM (procedure, "run-mode",
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"Run mode",
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"The run mode",
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GIMP_TYPE_RUN_MODE,
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GIMP_RUN_INTERACTIVE,
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G_PARAM_READWRITE);
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GIMP_PROC_ARG_IMAGE (procedure, "image",
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"Image",
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"The input image",
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FALSE,
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G_PARAM_READWRITE);
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}
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return procedure;
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}
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static GimpValueArray *
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metadata_run (GimpProcedure *procedure,
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const GimpValueArray *args,
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gpointer run_data)
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{
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GimpImage *image;
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GimpMetadata *metadata;
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GError *error = NULL;
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INIT_I18N ();
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gimp_ui_init (PLUG_IN_BINARY);
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image = GIMP_VALUES_GET_IMAGE (args, 1);
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metadata = gimp_image_get_metadata (image);
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/* Always show metadata dialog so we can add appropriate iptc data
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* as needed. Sometimes license data needs to be added after the
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* fact and the image may not contain metadata but should have it
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* added as needed.
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*/
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if (! metadata)
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{
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metadata = gimp_metadata_new ();
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gimp_image_set_metadata (image, metadata);
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}
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if (metadata_viewer_dialog (image, metadata, &error))
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return gimp_procedure_new_return_values (procedure, GIMP_PDB_SUCCESS, NULL);
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else
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return gimp_procedure_new_return_values (procedure, GIMP_PDB_EXECUTION_ERROR, error);
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}
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static gboolean
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metadata_viewer_dialog (GimpImage *image,
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GimpMetadata *g_metadata,
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GError **error)
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{
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GtkBuilder *builder;
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GtkWidget *dialog;
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GtkWidget *metadata_vbox;
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GtkWidget *content_area;
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gchar *ui_file;
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gchar *title;
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gchar *name;
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GError *local_error = NULL;
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GExiv2Metadata *metadata;
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metadata = GEXIV2_METADATA(g_metadata);
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builder = gtk_builder_new ();
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ui_file = g_build_filename (gimp_data_directory (),
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"ui", "plug-ins", "plug-in-metadata-viewer.ui", NULL);
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if (! gtk_builder_add_from_file (builder, ui_file, &local_error))
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{
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if (! local_error)
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local_error = g_error_new_literal (G_FILE_ERROR, 0,
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_("Error loading metadata-viewer dialog."));
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g_propagate_error (error, local_error);
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g_free (ui_file);
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g_object_unref (builder);
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return FALSE;
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}
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g_free (ui_file);
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name = gimp_image_get_name (image);
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title = g_strdup_printf (_("Metadata Viewer: %s"), name);
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g_free (name);
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dialog = gimp_dialog_new (title,
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"gimp-metadata-viewer-dialog",
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NULL, 0,
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gimp_standard_help_func, PLUG_IN_PROC,
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_("_Close"), GTK_RESPONSE_CLOSE,
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NULL);
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gtk_widget_set_size_request(dialog, 650, 500);
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g_free (title);
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gimp_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
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GTK_RESPONSE_CLOSE,
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-1);
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content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
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metadata_vbox = GTK_WIDGET (gtk_builder_get_object (builder,
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"metadata-vbox"));
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gtk_container_set_border_width (GTK_CONTAINER (metadata_vbox), 12);
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gtk_box_pack_start (GTK_BOX (content_area), metadata_vbox, TRUE, TRUE, 0);
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metadata_dialog_set_metadata (metadata, builder);
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gtk_dialog_run (GTK_DIALOG (dialog));
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return TRUE;
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}
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/* private functions */
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static void
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metadata_dialog_set_metadata (GExiv2Metadata *metadata,
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GtkBuilder *builder)
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{
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gchar **tags;
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GtkListStore *store;
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/* load exif tags */
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tags = gexiv2_metadata_get_exif_tags (metadata);
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store = GTK_LIST_STORE (gtk_builder_get_object (builder, "exif-liststore"));
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metadata_dialog_append_tags (metadata, tags, store, C_EXIF_TAG, C_EXIF_VALUE, FALSE);
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g_strfreev (tags);
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/* load xmp tags */
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tags = gexiv2_metadata_get_xmp_tags (metadata);
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store = GTK_LIST_STORE (gtk_builder_get_object (builder, "xmp-liststore"));
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metadata_dialog_append_tags (metadata, tags, store, C_XMP_TAG, C_XMP_VALUE, FALSE);
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g_strfreev (tags);
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/* load iptc tags */
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tags = gexiv2_metadata_get_iptc_tags (metadata);
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store = GTK_LIST_STORE (gtk_builder_get_object (builder, "iptc-liststore"));
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metadata_dialog_append_tags (metadata, tags, store, C_IPTC_TAG, C_IPTC_VALUE, TRUE);
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g_strfreev (tags);
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}
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static gchar *
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metadata_format_string_value (const gchar *value,
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gboolean truncate)
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{
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glong size;
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gchar *result;
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size = g_utf8_strlen (value, -1);
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if (! truncate || size <= TAG_VALUE_MAX_SIZE)
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{
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result = g_strdup(value);
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}
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else
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{
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gchar *value_utf8_trunc;
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GString *str;
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value_utf8_trunc = g_utf8_substring (value, 0, TAG_VALUE_MAX_SIZE);
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str = g_string_new (value_utf8_trunc);
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g_free (value_utf8_trunc);
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g_string_append (str, "... ");
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g_string_append_printf (str,
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_("(%lu more character(s))"),
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size - TAG_VALUE_MAX_SIZE);
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result = g_string_free (str, FALSE);
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}
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return result;
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}
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static inline gboolean
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metadata_tag_is_string (const gchar *tag)
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{
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const gchar *tag_type;
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tag_type = gexiv2_metadata_get_tag_type (tag);
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return (g_strcmp0 (tag_type, "Byte") != 0 &&
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g_strcmp0 (tag_type, "Undefined") != 0 &&
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g_strcmp0 (tag_type, NULL) != 0);
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}
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static void
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metadata_dialog_add_tag (GtkListStore *store,
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GtkTreeIter iter,
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gint tag_column,
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gint value_column,
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const gchar *tag,
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const gchar *value)
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{
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if (value)
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{
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gtk_list_store_append (store, &iter);
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gtk_list_store_set (store, &iter,
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tag_column, tag,
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value_column, value,
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-1);
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}
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}
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static void
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metadata_dialog_add_translated_tag (GExiv2Metadata *metadata,
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GtkListStore *store,
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GtkTreeIter iter,
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gint tag_column,
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gint value_column,
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const gchar *tag)
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{
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gchar *value;
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value = gexiv2_metadata_get_tag_interpreted_string (metadata, tag);
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metadata_dialog_add_tag (store, iter, tag_column, value_column,
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tag, gettext (value));
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g_free (value);
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}
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static gchar *
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metadata_interpret_user_comment (gchar *comment)
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{
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/* Exiv2 can return unwanted text at the start of a comment
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* taken from Exif.Photo.UserComment since 0.27.3.
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* Let's remove that part and replace with an empty string
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* if there is nothing else left as comment. */
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if (comment && g_str_has_prefix (comment, "charset=Ascii "))
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{
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gchar *real_comment;
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/* Skip "charset=Ascii " (length 14) to find the real comment */
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real_comment = comment + 14;
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if (real_comment[0] == '\0' ||
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! g_strcmp0 (real_comment, "binary comment"))
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{
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g_free (comment);
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/* Make empty comment instead of returning NULL or else
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* the exif value will not be shown at all. */
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comment = g_strdup ("");
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}
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else
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{
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real_comment = g_strdup (real_comment);
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g_free (comment);
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return real_comment;
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}
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}
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return comment;
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}
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static void
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metadata_dialog_append_tags (GExiv2Metadata *metadata,
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gchar **tags,
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GtkListStore *store,
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gint tag_column,
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gint value_column,
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gboolean load_iptc)
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{
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GtkTreeIter iter;
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const gchar *tag;
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const gchar *last_tag = NULL;
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gboolean gps_done = FALSE;
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while ((tag = *tags++))
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{
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gchar *value;
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gchar **values;
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/* We need special handling for iptc tags like "Keywords" which
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* can appear multiple times. For now assuming that this can
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* only happen for iptc tags of String and related types.
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* See also: https://exiv2.org/iptc.html which only lists
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* one Date type as repeatable (Iptc.Application2.ReferenceDate),
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* and Date is handled here as string.
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*/
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if (load_iptc && metadata_tag_is_string (tag))
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{
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if (last_tag && ! strcmp (tag, last_tag))
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{
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continue;
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}
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last_tag = tag;
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values = gexiv2_metadata_get_tag_multiple (GEXIV2_METADATA (metadata),
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tag);
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if (values)
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{
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gint i;
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for (i = 0; values[i] != NULL; i++)
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{
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gtk_list_store_append (store, &iter);
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value = metadata_format_string_value (values[i], /* truncate = */ TRUE);
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gtk_list_store_set (store, &iter,
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tag_column, tag,
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value_column, value,
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-1);
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g_free (value);
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}
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g_strfreev (values);
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}
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}
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else if (! strcmp ("Exif.GPSInfo.GPSLongitude", tag) ||
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! strcmp ("Exif.GPSInfo.GPSLongitudeRef", tag) ||
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! strcmp ("Exif.GPSInfo.GPSLatitude", tag) ||
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! strcmp ("Exif.GPSInfo.GPSLatitudeRef", tag) ||
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! strcmp ("Exif.GPSInfo.GPSAltitude", tag) ||
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! strcmp ("Exif.GPSInfo.GPSAltitudeRef", tag))
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{
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/* We need special handling for some of the GPS tags to
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* be able to show better values than the default. */
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if (! gps_done)
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{
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gdouble lng, lat, alt;
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gchar *str;
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gchar *value;
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if (gexiv2_metadata_get_gps_longitude (GEXIV2_METADATA (metadata),
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&lng))
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{
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str = metadata_format_gps_longitude_latitude (lng);
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metadata_dialog_add_tag (store, iter,
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tag_column, value_column,
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"Exif.GPSInfo.GPSLongitude",
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str);
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g_free (str);
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}
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metadata_dialog_add_translated_tag (metadata, store, iter,
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tag_column, value_column,
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"Exif.GPSInfo.GPSLongitudeRef");
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if (gexiv2_metadata_get_gps_latitude (GEXIV2_METADATA (metadata),
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&lat))
|
|
{
|
|
str = metadata_format_gps_longitude_latitude (lat);
|
|
metadata_dialog_add_tag (store, iter,
|
|
tag_column, value_column,
|
|
"Exif.GPSInfo.GPSLatitude",
|
|
str);
|
|
g_free (str);
|
|
}
|
|
metadata_dialog_add_translated_tag (metadata, store, iter,
|
|
tag_column, value_column,
|
|
"Exif.GPSInfo.GPSLatitudeRef");
|
|
|
|
if (gexiv2_metadata_get_gps_altitude (GEXIV2_METADATA (metadata),
|
|
&alt))
|
|
{
|
|
gchar *str2, *str3;
|
|
|
|
str = metadata_format_gps_altitude (alt, TRUE, _(" meter"));
|
|
str2 = metadata_format_gps_altitude (alt, FALSE, _(" feet"));
|
|
str3 = g_strdup_printf ("%s (%s)", str, str2);
|
|
metadata_dialog_add_tag (store, iter,
|
|
tag_column, value_column,
|
|
"Exif.GPSInfo.GPSAltitude",
|
|
str3);
|
|
g_free (str);
|
|
g_free (str2);
|
|
g_free (str3);
|
|
value = gexiv2_metadata_get_tag_string (metadata,
|
|
"Exif.GPSInfo.GPSAltitudeRef");
|
|
|
|
if (value)
|
|
{
|
|
gint index;
|
|
|
|
if (value[0] == '0')
|
|
index = 1;
|
|
else if (value[0] == '1')
|
|
index = 2;
|
|
else
|
|
index = 0;
|
|
metadata_dialog_add_tag (store, iter,
|
|
tag_column, value_column,
|
|
"Exif.GPSInfo.GPSAltitudeRef",
|
|
gettext (gpsaltref[index]));
|
|
g_free (value);
|
|
}
|
|
}
|
|
gps_done = TRUE;
|
|
}
|
|
}
|
|
else if (! strcmp ("Exif.Photo.UserComment", tag))
|
|
{
|
|
value = gexiv2_metadata_get_tag_interpreted_string (metadata, tag);
|
|
/* Can start with charset. Remove part that is not relevant. */
|
|
value = metadata_interpret_user_comment (value);
|
|
|
|
metadata_dialog_add_tag (store, iter,
|
|
tag_column, value_column,
|
|
tag, value);
|
|
g_free (value);
|
|
}
|
|
else
|
|
{
|
|
value = metadata_dialog_format_tag_value (metadata, tag,
|
|
/* truncate = */ TRUE);
|
|
metadata_dialog_add_tag (store, iter,
|
|
tag_column, value_column,
|
|
tag, value);
|
|
g_free (value);
|
|
}
|
|
}
|
|
}
|
|
|
|
static gchar *
|
|
metadata_dialog_format_tag_value (GExiv2Metadata *metadata,
|
|
const gchar *tag,
|
|
gboolean truncate)
|
|
{
|
|
gchar *result;
|
|
|
|
if (metadata_tag_is_string(tag))
|
|
{
|
|
gchar *value;
|
|
gchar *value_utf8;
|
|
|
|
value = gexiv2_metadata_get_tag_interpreted_string (metadata, tag);
|
|
if (! g_utf8_validate (value, -1, NULL))
|
|
{
|
|
value_utf8 = g_locale_to_utf8 (value, -1, NULL, NULL, NULL);
|
|
}
|
|
else
|
|
{
|
|
value_utf8 = g_strdup (value);
|
|
}
|
|
|
|
g_free (value);
|
|
|
|
result = metadata_format_string_value (value_utf8, truncate);
|
|
}
|
|
else
|
|
{
|
|
GBytes *bytes;
|
|
const guchar *data;
|
|
gsize size;
|
|
gsize display_size;
|
|
GString *str;
|
|
gint i;
|
|
|
|
bytes = gexiv2_metadata_get_tag_raw (metadata, tag);
|
|
data = g_bytes_get_data (bytes, &size);
|
|
|
|
if (! truncate)
|
|
display_size = size;
|
|
else
|
|
display_size = MIN (size, RAW_DATA_MAX_SIZE);
|
|
|
|
str = g_string_sized_new (3 * display_size);
|
|
|
|
for (i = 0; i < display_size; i++)
|
|
g_string_append_printf (str, i == 0 ? "%02x" : " %02x", data[i]);
|
|
|
|
if (display_size < size)
|
|
{
|
|
g_string_append (str, " ... ");
|
|
g_string_append_printf (str,
|
|
_("(%llu more byte(s))"),
|
|
(unsigned long long) (size - display_size));
|
|
}
|
|
|
|
result = g_string_free (str, FALSE);
|
|
|
|
g_bytes_unref (bytes);
|
|
}
|
|
|
|
return result;
|
|
}
|