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/* See LICENSE file for copyright and license details. */
#include "common.h"
struct filter {
char *name;
size_t suffixes_start;
size_t suffixes_end;
};
static char *suffixes = NULL;
static struct filter *filters = NULL;
static size_t nfilters = 0u;
static struct filter anyfilter = {NULL, 0u, 0u};
static int
file_filter(const GtkFileFilterInfo *info, void *user)
{
struct filter *filter = user;
size_t pos, name_len, suffix_len;
const char *name, *suffix;
size_t backup;
if (!info->filename)
return 0;
if (!filter || g_file_test(info->filename, G_FILE_TEST_IS_DIR))
return 1;
name = info->filename;
name_len = strlen(name);
if (!name_len)
return 0;
for (pos = filter->suffixes_start; pos != filter->suffixes_end; pos += suffix_len + 1u) {
suffix = &suffixes[pos];
suffix_len = strlen(suffix);
backup = (size_t)(name[name_len - 1u] == '~');
if (name_len <= 1u + suffix_len + backup)
continue;
if (name[name_len - (1u + suffix_len + backup)] != '.')
continue;
if (memcmp(&name[name_len - (suffix_len + backup)], suffix, suffix_len))
continue;
return 1;
}
return 0;
}
static int
filtercmp(const void *a_void, const void *b_void)
{
const struct filter *a = a_void, *b = b_void;
return strcmp(a->name, b->name);
}
static void
populate_filters(void)
{
GSList *formats, *item;
GdkPixbufFormat *format;
char **extensions, **extension, *p;
const char *name;
size_t i, len = 0u;
size_t ext_len, need, count;
formats = gdk_pixbuf_get_formats();
for (item = formats; item; item = item->next) {
format = item->data;
if (gdk_pixbuf_format_is_disabled(format))
continue;
name = gdk_pixbuf_format_get_description(format);
extensions = gdk_pixbuf_format_get_extensions(format);
need = 0u;
count = 0u;
for (extension = extensions; *extension; extension++) {
ext_len = strlen(*extension);
if (need > SIZE_MAX - 1u - ext_len)
eprintf("Out of address space");
need += ext_len + 1u;
count += 1u;
}
if (need > SIZE_MAX - len)
eprintf("Out of address space");
if (!count)
goto next;
filters = ereallocarray(filters, nfilters + 1u, sizeof(*filters));
filters[nfilters].suffixes_start = len;
filters[nfilters].name = emalloc(strlen(name) + sizeof(" ()") + need + (count - 1u));
p = stpcpy(stpcpy(filters[nfilters].name, name), " (");
suffixes = erealloc(suffixes, need + len);
for (extension = extensions;;) {
ext_len = strlen(*extension);
memcpy(&suffixes[len], *extension, ext_len + 1u);
len += ext_len + 1u;
memcpy(p, *extension, ext_len);
p = &p[ext_len];
if (!*++extension)
break;
p = stpcpy(p, ", ");
}
p = stpcpy(p, ")");
for (i = 0u; i < nfilters; i++) {
if (!strcmp(filters[nfilters].name, filters[i].name)) {
free(filters[nfilters].name);
len = filters[nfilters].suffixes_start;
goto next;
}
}
filters[nfilters].suffixes_end = len;
nfilters += 1u;
next:
g_strfreev(extensions);
}
qsort(filters, nfilters, sizeof(*filters), &filtercmp);
anyfilter.suffixes_end = len;
g_slist_free(formats);
}
void
add_image_filters(GtkFileChooser *chooser)
{
static int populated = 0;
GtkFileFilter *filter;
size_t i;
if (!populated) {
populate_filters();
populated = 1;
}
filter = gtk_file_filter_new();
gtk_file_filter_set_name(filter, "All images");
gtk_file_filter_add_custom(filter, GTK_FILE_FILTER_FILENAME, file_filter, &anyfilter, NULL);
gtk_file_chooser_add_filter(chooser, filter);
for (i = 0u; i < nfilters; i++) {
filter = gtk_file_filter_new();
gtk_file_filter_set_name(filter, filters[i].name);
gtk_file_filter_add_custom(filter, GTK_FILE_FILTER_FILENAME, file_filter, &filters[i], NULL);
gtk_file_chooser_add_filter(chooser, filter);
}
filter = gtk_file_filter_new();
gtk_file_filter_set_name(filter, "All files");
gtk_file_filter_add_custom(filter, GTK_FILE_FILTER_FILENAME, file_filter, NULL, NULL);
gtk_file_chooser_add_filter(chooser, filter);
}
void
free_image_filters(void)
{
free(suffixes);
while (nfilters)
free(filters[--nfilters].name);
free(filters);
}
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