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-rw-r--r--plug-ins/help/gimphelpdomain.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/plug-ins/help/gimphelpdomain.c b/plug-ins/help/gimphelpdomain.c
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+++ b/plug-ins/help/gimphelpdomain.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * The GIMP Help plug-in
+ * Copyright (C) 1999-2008 Sven Neumann <sven@gimp.org>
+ * Michael Natterer <mitch@gimp.org>
+ * Henrik Brix Andersen <brix@gimp.org>
+ *
+ * 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 3 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 <https://www.gnu.org/licenses/>.
+ */
+
+/* This code is written so that it can also be compiled standalone.
+ * It shouldn't depend on libgimp.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "gimphelp.h"
+
+#ifdef DISABLE_NLS
+#define _(String) (String)
+#else
+#include "libgimp/stdplugins-intl.h"
+#endif
+
+
+/* local function prototypes */
+
+static gboolean domain_locale_parse (GimpHelpDomain *domain,
+ GimpHelpLocale *locale,
+ GimpHelpProgress *progress,
+ GError **error);
+
+
+/* public functions */
+
+GimpHelpDomain *
+gimp_help_domain_new (const gchar *domain_name,
+ const gchar *domain_uri)
+{
+ GimpHelpDomain *domain = g_slice_new0 (GimpHelpDomain);
+
+ domain->help_domain = g_strdup (domain_name);
+ domain->help_uri = g_strdup (domain_uri);
+
+ if (domain_uri)
+ {
+ /* strip trailing slash */
+ if (g_str_has_suffix (domain->help_uri, "/"))
+ domain->help_uri[strlen (domain->help_uri) - 1] = '\0';
+ }
+
+ return domain;
+}
+
+void
+gimp_help_domain_free (GimpHelpDomain *domain)
+{
+ g_return_if_fail (domain != NULL);
+
+ if (domain->help_locales)
+ g_hash_table_destroy (domain->help_locales);
+
+ g_free (domain->help_domain);
+ g_free (domain->help_uri);
+
+ g_slice_free (GimpHelpDomain, domain);
+}
+
+GimpHelpLocale *
+gimp_help_domain_lookup_locale (GimpHelpDomain *domain,
+ const gchar *locale_id,
+ GimpHelpProgress *progress)
+{
+ GimpHelpLocale *locale = NULL;
+
+ if (domain->help_locales)
+ locale = g_hash_table_lookup (domain->help_locales, locale_id);
+ else
+ domain->help_locales =
+ g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free,
+ (GDestroyNotify) gimp_help_locale_free);
+
+ if (locale)
+ return locale;
+
+ locale = gimp_help_locale_new (locale_id);
+ g_hash_table_insert (domain->help_locales, g_strdup (locale_id), locale);
+
+ domain_locale_parse (domain, locale, progress, NULL);
+
+ return locale;
+}
+
+gchar *
+gimp_help_domain_map (GimpHelpDomain *domain,
+ GList *help_locales,
+ const gchar *help_id,
+ GimpHelpProgress *progress,
+ GimpHelpLocale **ret_locale,
+ gboolean *fatal_error)
+{
+ GimpHelpLocale *locale = NULL;
+ const gchar *ref = NULL;
+ GList *list;
+
+ g_return_val_if_fail (domain != NULL, NULL);
+ g_return_val_if_fail (help_locales != NULL, NULL);
+ g_return_val_if_fail (help_id != NULL, NULL);
+
+ if (fatal_error)
+ *fatal_error = FALSE;
+
+ /* first pass: look for a reference matching the help_id */
+ for (list = help_locales; list && !ref; list = list->next)
+ {
+ locale = gimp_help_domain_lookup_locale (domain,
+ (const gchar *) list->data,
+ progress);
+ ref = gimp_help_locale_map (locale, help_id);
+ }
+
+ /* second pass: look for a fallback */
+ for (list = help_locales; list && !ref; list = list->next)
+ {
+ locale = gimp_help_domain_lookup_locale (domain,
+ (const gchar *) list->data,
+ progress);
+ ref = locale->help_missing;
+ }
+
+ if (ret_locale)
+ *ret_locale = locale;
+
+ if (ref)
+ {
+ return g_strconcat (domain->help_uri, "/",
+ locale->locale_id, "/",
+ ref,
+ NULL);
+ }
+ else /* try to assemble a useful error message */
+ {
+ GError *error = NULL;
+
+#ifdef GIMP_HELP_DEBUG
+ g_printerr ("help: help_id lookup and all fallbacks failed for '%s'\n",
+ help_id);
+#endif
+
+ locale = gimp_help_domain_lookup_locale (domain,
+ GIMP_HELP_DEFAULT_LOCALE, NULL);
+
+ if (! domain_locale_parse (domain, locale, NULL, &error))
+ {
+ switch (error->code)
+ {
+ case G_IO_ERROR_NOT_FOUND:
+ if (domain->help_domain)
+ {
+ g_message (_("The help pages for '%s' are not available."),
+ domain->help_domain);
+ }
+ else
+ {
+ g_message ("%s\n\n%s",
+ _("The GIMP user manual is not available."),
+ /* TRANSLATORS: do not end the URL with a dot,
+ * it would be in the link. Because of
+ * technical limitations, make sure the URL
+ * ends with a space, a newline or is end of text.
+ * Cf. bug 762282.
+ */
+ _("Please install the additional help package "
+ "or use the online user manual at: "
+ "https://docs.gimp.org/"));
+ }
+ break;
+
+ case G_IO_ERROR_NOT_SUPPORTED:
+ g_message ("%s\n\n%s",
+ error->message,
+ _("Perhaps you are missing GIO backends and need "
+ "to install GVFS?"));
+ break;
+
+ case G_IO_ERROR_CANCELLED:
+ break;
+
+ default:
+ g_message ("%s", error->message);
+ break;
+ }
+
+ g_error_free (error);
+
+ if (fatal_error)
+ *fatal_error = TRUE;
+ }
+ else
+ {
+ g_message (_("Help ID '%s' unknown"), help_id);
+ }
+
+ return NULL;
+ }
+}
+
+
+/* private functions */
+
+static gboolean
+domain_locale_parse (GimpHelpDomain *domain,
+ GimpHelpLocale *locale,
+ GimpHelpProgress *progress,
+ GError **error)
+{
+ gchar *uri;
+ gboolean success;
+
+ g_return_val_if_fail (domain != NULL, FALSE);
+ g_return_val_if_fail (locale != NULL, FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ uri = g_strdup_printf ("%s/%s/gimp-help.xml",
+ domain->help_uri, locale->locale_id);
+
+ success = gimp_help_locale_parse (locale, uri, domain->help_domain,
+ progress, error);
+
+ g_free (uri);
+
+ return success;
+}
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