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Diffstat (limited to '')
-rw-r--r-- | app/core/gimpcontainer-filter.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/app/core/gimpcontainer-filter.c b/app/core/gimpcontainer-filter.c new file mode 100644 index 0000000..956a4a0 --- /dev/null +++ b/app/core/gimpcontainer-filter.c @@ -0,0 +1,174 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis + * + * gimpcontainer-filter.c + * Copyright (C) 2003 Sven Neumann <sven@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/>. + */ + +#include "config.h" + +#include <string.h> + +#include <glib-object.h> + +#include "core-types.h" + +#include "gimpcontainer.h" +#include "gimpcontainer-filter.h" +#include "gimplist.h" + + +typedef struct +{ + GimpObjectFilterFunc filter; + GimpContainer *container; + gpointer user_data; +} GimpContainerFilterContext; + + +static void +gimp_container_filter_foreach_func (GimpObject *object, + GimpContainerFilterContext *context) +{ + if (context->filter (object, context->user_data)) + gimp_container_add (context->container, object); +} + +/** + * gimp_container_filter: + * @container: a #GimpContainer to filter + * @filter: a #GimpObjectFilterFunc + * @user_data: a pointer passed to @filter + * + * Calls the supplied @filter function on each object in @container. + * A return value of %TRUE is interpreted as a match. + * + * Returns: a weak #GimpContainer filled with matching objects. + **/ +GimpContainer * +gimp_container_filter (GimpContainer *container, + GimpObjectFilterFunc filter, + gpointer user_data) +{ + GimpContainer *result; + GimpContainerFilterContext context; + + g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL); + g_return_val_if_fail (filter != NULL, NULL); + + result = + g_object_new (G_TYPE_FROM_INSTANCE (container), + "children-type", gimp_container_get_children_type (container), + "policy", GIMP_CONTAINER_POLICY_WEAK, + NULL); + + context.filter = filter; + context.container = result; + context.user_data = user_data; + + gimp_container_foreach (container, + (GFunc) gimp_container_filter_foreach_func, + &context); + + /* This is somewhat ugly, but it keeps lists in the same order. */ + if (GIMP_IS_LIST (result)) + gimp_list_reverse (GIMP_LIST (result)); + + + return result; +} + + +static gboolean +gimp_object_filter_by_name (GimpObject *object, + const GRegex *regex) +{ + return g_regex_match (regex, gimp_object_get_name (object), 0, NULL); +} + +/** + * gimp_container_filter_by_name: + * @container: a #GimpContainer to filter + * @regexp: a regular expression (as a %NULL-terminated string) + * @error: error location to report errors or %NULL + * + * This function performs a case-insensitive regular expression search + * on the names of the GimpObjects in @container. + * + * Returns: a weak #GimpContainer filled with matching objects. + **/ +GimpContainer * +gimp_container_filter_by_name (GimpContainer *container, + const gchar *regexp, + GError **error) +{ + GimpContainer *result; + GRegex *regex; + + g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL); + g_return_val_if_fail (regexp != NULL, NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + regex = g_regex_new (regexp, G_REGEX_CASELESS | G_REGEX_OPTIMIZE, 0, + error); + + if (! regex) + return NULL; + + result = + gimp_container_filter (container, + (GimpObjectFilterFunc) gimp_object_filter_by_name, + regex); + + g_regex_unref (regex); + + return result; +} + + +gchar ** +gimp_container_get_filtered_name_array (GimpContainer *container, + const gchar *regexp, + gint *length) +{ + GimpContainer *weak; + GError *error = NULL; + + g_return_val_if_fail (GIMP_IS_CONTAINER (container), NULL); + g_return_val_if_fail (length != NULL, NULL); + + if (regexp == NULL || strlen (regexp) == 0) + return (gimp_container_get_name_array (container, length)); + + weak = gimp_container_filter_by_name (container, regexp, &error); + + if (weak) + { + gchar **retval = gimp_container_get_name_array (weak, length); + + g_object_unref (weak); + + return retval; + } + else + { + g_warning ("%s", error->message); + g_error_free (error); + + *length = 0; + return NULL; + } +} |