1 files changed, 313 insertions, 0 deletions
diff --git a/shell/ev-metadata.c b/shell/ev-metadata.c
new file mode 100644
index 00000000..9056b2fd
--- /dev/null
+++ b/shell/ev-metadata.c
@@ -0,0 +1,313 @@
+/* ev-metadata.c
+ * this file is part of evince, a mate document viewer
+ *
+ * Copyright (C) 2009 Carlos Garcia Campos <[email protected]>
+ *
+ * Evince 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.
+ *
+ * Evince 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <gio/gio.h>
+#include <string.h>
+
+#include "ev-metadata.h"
+
+struct _EvMetadata {
+ GObject base;
+
+ GFile *file;
+ GHashTable *items;
+};
+
+struct _EvMetadataClass {
+ GObjectClass base_class;
+};
+
+G_DEFINE_TYPE (EvMetadata, ev_metadata, G_TYPE_OBJECT)
+
+#define EV_METADATA_NAMESPACE "metadata::evince"
+
+static void
+ev_metadata_finalize (GObject *object)
+{
+ EvMetadata *metadata = EV_METADATA (object);
+
+ if (metadata->items) {
+ g_hash_table_destroy (metadata->items);
+ metadata->items = NULL;
+ }
+
+ if (metadata->file) {
+ g_object_unref (metadata->file);
+ metadata->file = NULL;
+ }
+
+ G_OBJECT_CLASS (ev_metadata_parent_class)->finalize (object);
+}
+
+static void
+ev_metadata_init (EvMetadata *metadata)
+{
+ metadata->items = g_hash_table_new_full (g_str_hash,
+ g_str_equal,
+ g_free,
+ g_free);
+}
+
+static void
+ev_metadata_class_init (EvMetadataClass *klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+ gobject_class->finalize = ev_metadata_finalize;
+}
+
+static void
+ev_metadata_load (EvMetadata *metadata)
+{
+ GFileInfo *info;
+ gchar **attrs;
+ gint i;
+ GError *error = NULL;
+
+ info = g_file_query_info (metadata->file, "metadata::*", 0, NULL, &error);
+ if (!info) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+
+ return;
+ }
+
+ if (!g_file_info_has_namespace (info, "metadata")) {
+ g_object_unref (info);
+
+ return;
+ }
+
+ attrs = g_file_info_list_attributes (info, "metadata");
+ for (i = 0; attrs[i]; i++) {
+ GFileAttributeType type;
+ gpointer value;
+ const gchar *key;
+
+ if (!g_str_has_prefix (attrs[i], EV_METADATA_NAMESPACE))
+ continue;
+
+ if (!g_file_info_get_attribute_data (info, attrs[i],
+ &type, &value, NULL)) {
+ continue;
+ }
+
+ key = attrs[i] + strlen (EV_METADATA_NAMESPACE"::");
+
+ if (type == G_FILE_ATTRIBUTE_TYPE_STRING) {
+ g_hash_table_insert (metadata->items,
+ g_strdup (key),
+ g_strdup (value));
+ }
+ }
+ g_strfreev (attrs);
+ g_object_unref (info);
+}
+
+EvMetadata *
+ev_metadata_new (GFile *file)
+{
+ EvMetadata *metadata;
+
+ g_return_val_if_fail (G_IS_FILE (file), NULL);
+
+ metadata = EV_METADATA (g_object_new (EV_TYPE_METADATA, NULL));
+ metadata->file = g_object_ref (file);
+
+ ev_metadata_load (metadata);
+
+ return metadata;
+}
+
+gboolean
+ev_metadata_is_empty (EvMetadata *metadata)
+{
+ return g_hash_table_size (metadata->items) == 0;
+}
+
+gboolean
+ev_metadata_get_string (EvMetadata *metadata,
+ const gchar *key,
+ gchar **value)
+{
+ gchar *v;
+
+ v = g_hash_table_lookup (metadata->items, key);
+ if (!v)
+ return FALSE;
+
+ *value = v;
+ return TRUE;
+}
+
+static void
+metadata_set_callback (GObject *file,
+ GAsyncResult *result,
+ EvMetadata *metadata)
+{
+ GError *error = NULL;
+
+ if (!g_file_set_attributes_finish (G_FILE (file), result, NULL, &error)) {
+ g_warning ("%s", error->message);
+ g_error_free (error);
+ }
+}
+
+gboolean
+ev_metadata_set_string (EvMetadata *metadata,
+ const gchar *key,
+ const gchar *value)
+{
+ GFileInfo *info;
+ gchar *gio_key;
+
+ info = g_file_info_new ();
+
+ gio_key = g_strconcat (EV_METADATA_NAMESPACE"::", key, NULL);
+ if (value) {
+ g_file_info_set_attribute_string (info, gio_key, value);
+ } else {
+ g_file_info_set_attribute (info, gio_key,
+ G_FILE_ATTRIBUTE_TYPE_INVALID,
+ NULL);
+ }
+ g_free (gio_key);
+
+ g_hash_table_insert (metadata->items, g_strdup (key), g_strdup (value));
+ g_file_set_attributes_async (metadata->file,
+ info,
+ 0,
+ G_PRIORITY_DEFAULT,
+ NULL,
+ (GAsyncReadyCallback)metadata_set_callback,
+ metadata);
+ g_object_unref (info);
+
+ return TRUE;
+}
+
+gboolean
+ev_metadata_get_int (EvMetadata *metadata,
+ const gchar *key,
+ gint *value)
+{
+ gchar *string_value;
+ gchar *endptr;
+ gint int_value;
+
+ if (!ev_metadata_get_string (metadata, key, &string_value))
+ return FALSE;
+
+ int_value = g_ascii_strtoull (string_value, &endptr, 0);
+ if (int_value == 0 && string_value == endptr)
+ return FALSE;
+
+ *value = int_value;
+ return TRUE;
+}
+
+gboolean
+ev_metadata_set_int (EvMetadata *metadata,
+ const gchar *key,
+ gint value)
+{
+ gchar string_value[32];
+
+ g_snprintf (string_value, sizeof (string_value), "%d", value);
+
+ return ev_metadata_set_string (metadata, key, string_value);
+}
+
+gboolean
+ev_metadata_get_double (EvMetadata *metadata,
+ const gchar *key,
+ gdouble *value)
+{
+ gchar *string_value;
+ gchar *endptr;
+ gdouble double_value;
+
+ if (!ev_metadata_get_string (metadata, key, &string_value))
+ return FALSE;
+
+ double_value = g_ascii_strtod (string_value, &endptr);
+ if (double_value == 0. && string_value == endptr)
+ return FALSE;
+
+ *value = double_value;
+ return TRUE;
+}
+
+gboolean
+ev_metadata_set_double (EvMetadata *metadata,
+ const gchar *key,
+ gdouble value)
+{
+ gchar string_value[G_ASCII_DTOSTR_BUF_SIZE];
+
+ g_ascii_dtostr (string_value, G_ASCII_DTOSTR_BUF_SIZE, value);
+
+ return ev_metadata_set_string (metadata, key, string_value);
+}
+
+gboolean
+ev_metadata_get_boolean (EvMetadata *metadata,
+ const gchar *key,
+ gboolean *value)
+{
+ gint int_value;
+
+ if (!ev_metadata_get_int (metadata, key, &int_value))
+ return FALSE;
+
+ *value = int_value;
+ return TRUE;
+}
+
+gboolean
+ev_metadata_set_boolean (EvMetadata *metadata,
+ const gchar *key,
+ gboolean value)
+{
+ return ev_metadata_set_string (metadata, key, value ? "1" : "0");
+}
+
+gboolean
+ev_is_metadata_supported_for_file (GFile *file)
+{
+ GFileAttributeInfoList *namespaces;
+ gint i;
+ gboolean retval = FALSE;
+
+ namespaces = g_file_query_writable_namespaces (file, NULL, NULL);
+ if (!namespaces)
+ return retval;
+
+ for (i = 0; i < namespaces->n_infos; i++) {
+ if (strcmp (namespaces->infos[i].name, "metadata") == 0) {
+ retval = TRUE;
+ break;
+ }
+ }
+
+ g_file_attribute_info_list_unref (namespaces);
+
+ return retval;
+}