276 lines
9.4 KiB
C
276 lines
9.4 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pika-tags.c
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* Copyright (C) 2009 Aurimas Juška <aurisj@svn.gnome.org>
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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 <gio/gio.h>
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#include <gegl.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "core-types.h"
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#include "config/pikaxmlparser.h"
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#include "pika-utils.h"
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#include "pika-tags.h"
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#include "pika-intl.h"
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#define PIKA_TAGS_FILE "tags.xml"
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typedef struct
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{
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const gchar *locale;
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GString *buf;
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gboolean locale_matches;
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} PikaTagsInstaller;
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static void pika_tags_installer_load_start_element (GMarkupParseContext *context,
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const gchar *element_name,
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const gchar **attribute_names,
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const gchar **attribute_values,
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gpointer user_data,
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GError **error);
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static void pika_tags_installer_load_end_element (GMarkupParseContext *context,
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const gchar *element_name,
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gpointer user_data,
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GError **error);
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static void pika_tags_installer_load_text (GMarkupParseContext *context,
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const gchar *text,
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gsize text_len,
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gpointer user_data,
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GError **error);
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static const gchar* attribute_name_to_value (const gchar **attribute_names,
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const gchar **attribute_values,
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const gchar *name);
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gboolean
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pika_tags_user_install (void)
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{
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GFile *file;
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GOutputStream *output;
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GMarkupParser markup_parser;
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PikaXmlParser *xml_parser;
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const char *tags_locale;
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PikaTagsInstaller tags_installer = { 0, };
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GError *error = NULL;
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gboolean result = TRUE;
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/* This is a special string to specify the language identifier to
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* look for in the pika-tags-default.xml file. Please translate the
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* C in it according to the name of the po file used for
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* pika-tags-default.xml. E.g. lithuanian for the translation,
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* that would be "tags-locale:lt".
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*/
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tags_locale = _("tags-locale:C");
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if (g_str_has_prefix (tags_locale, "tags-locale:"))
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{
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tags_locale += strlen ("tags-locale:");
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if (*tags_locale && *tags_locale != 'C')
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tags_installer.locale = tags_locale;
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}
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else
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{
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g_warning ("Wrong translation for 'tags-locale:', fix the translation!");
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}
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tags_installer.buf = g_string_new (NULL);
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g_string_append (tags_installer.buf, "<?xml version='1.0' encoding='UTF-8'?>\n");
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g_string_append (tags_installer.buf, "<tags>\n");
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markup_parser.start_element = pika_tags_installer_load_start_element;
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markup_parser.end_element = pika_tags_installer_load_end_element;
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markup_parser.text = pika_tags_installer_load_text;
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markup_parser.passthrough = NULL;
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markup_parser.error = NULL;
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xml_parser = pika_xml_parser_new (&markup_parser, &tags_installer);
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file = pika_data_directory_file ("tags", "pika-tags-default.xml", NULL);
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result = pika_xml_parser_parse_gfile (xml_parser, file, &error);
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g_object_unref (file);
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pika_xml_parser_free (xml_parser);
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if (! result)
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{
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g_string_free (tags_installer.buf, TRUE);
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return FALSE;
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}
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g_string_append (tags_installer.buf, "\n</tags>\n");
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file = pika_directory_file (PIKA_TAGS_FILE, NULL);
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output = G_OUTPUT_STREAM (g_file_replace (file,
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NULL, FALSE, G_FILE_CREATE_NONE,
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NULL, &error));
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if (! output)
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{
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g_printerr ("%s\n", error->message);
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result = FALSE;
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}
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else if (! g_output_stream_write_all (output,
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tags_installer.buf->str,
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tags_installer.buf->len,
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NULL, NULL, &error))
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{
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GCancellable *cancellable = g_cancellable_new ();
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g_printerr (_("Error writing '%s': %s"),
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pika_file_get_utf8_name (file), error->message);
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result = FALSE;
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/* Cancel the overwrite initiated by g_file_replace(). */
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g_cancellable_cancel (cancellable);
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g_output_stream_close (output, cancellable, NULL);
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g_object_unref (cancellable);
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}
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else if (! g_output_stream_close (output, NULL, &error))
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{
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g_printerr (_("Error closing '%s': %s"),
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pika_file_get_utf8_name (file), error->message);
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result = FALSE;
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}
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if (output)
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g_object_unref (output);
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g_clear_error (&error);
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g_object_unref (file);
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g_string_free (tags_installer.buf, TRUE);
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return result;
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}
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static void
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pika_tags_installer_load_start_element (GMarkupParseContext *context,
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const gchar *element_name,
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const gchar **attribute_names,
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const gchar **attribute_values,
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gpointer user_data,
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GError **error)
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{
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PikaTagsInstaller *tags_installer = user_data;
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if (! strcmp (element_name, "resource"))
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{
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g_string_append_printf (tags_installer->buf, "\n <resource");
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while (*attribute_names)
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{
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g_string_append_printf (tags_installer->buf, " %s=\"%s\"",
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*attribute_names, *attribute_values);
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attribute_names++;
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attribute_values++;
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}
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g_string_append_printf (tags_installer->buf, ">\n");
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}
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else if (! strcmp (element_name, "thetag"))
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{
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const char *current_locale;
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current_locale = attribute_name_to_value (attribute_names, attribute_values,
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"xml:lang");
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if (current_locale && tags_installer->locale)
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{
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tags_installer->locale_matches = ! strcmp (current_locale,
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tags_installer->locale);
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}
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else
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{
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tags_installer->locale_matches = (current_locale ==
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tags_installer->locale);
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}
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}
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}
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static void
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pika_tags_installer_load_end_element (GMarkupParseContext *context,
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const gchar *element_name,
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gpointer user_data,
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GError **error)
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{
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PikaTagsInstaller *tags_installer = user_data;
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if (strcmp (element_name, "resource") == 0)
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{
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g_string_append (tags_installer->buf, " </resource>\n");
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}
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}
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static void
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pika_tags_installer_load_text (GMarkupParseContext *context,
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const gchar *text,
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gsize text_len,
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gpointer user_data,
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GError **error)
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{
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PikaTagsInstaller *tags_installer = user_data;
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const gchar *current_element;
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gchar *tag_string;
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current_element = g_markup_parse_context_get_element (context);
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if (tags_installer->locale_matches &&
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current_element &&
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strcmp (current_element, "thetag") == 0)
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{
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tag_string = g_markup_escape_text (text, text_len);
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g_string_append_printf (tags_installer->buf, " <tag>%s</tag>\n",
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tag_string);
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g_free (tag_string);
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}
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}
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static const gchar *
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attribute_name_to_value (const gchar **attribute_names,
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const gchar **attribute_values,
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const gchar *name)
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{
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while (*attribute_names)
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{
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if (! strcmp (*attribute_names, name))
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{
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return *attribute_values;
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}
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attribute_names++;
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attribute_values++;
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}
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return NULL;
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}
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