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#define _DEFAULT_SOURCE
#include "file.h"
#include "image.h"
#include <dirent.h>
#include <gtk-3.0/gtk/gtk.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
static char **extensions = NULL;
char *get_filename_ext(const char *file_name)
{
char *dot = strrchr(file_name, '.');
if (!dot || dot == file_name)
return "";
return dot + 1;
}
int is_file_format_supported(const char *file_name)
{
char *file_ext = get_filename_ext(file_name);
char **it = extensions;
while (*it != NULL) {
if (!strcmp(*it++, file_ext)) {
return 1;
}
}
return 0;
}
void scan_supported_formats()
{
GSList *list, *it;
GdkPixbufFormat *format;
gchar **exts, **ex_it;
int i = 0;
list = gdk_pixbuf_get_formats();
if (list != NULL) {
for (it = list; it->next != NULL; it = it->next) {
format = (GdkPixbufFormat *)it->data;
exts = gdk_pixbuf_format_get_extensions(format);
if (exts != NULL) {
ex_it = exts;
while (*ex_it != NULL) {
extensions = realloc(extensions, sizeof(char *) * (i + 1));
extensions[i++] = strdup(*ex_it);
g_free(*ex_it);
ex_it++;
}
g_free(exts);
}
}
g_slist_free(list);
extensions[i] = NULL;
}
}
int image_filter(const struct dirent *dir)
{
if (dir->d_type == DT_REG && is_file_format_supported(dir->d_name)) {
return 1;
}
return 0;
}
int scan(const char *file_name)
{
scan_supported_formats();
struct dirent **name_list;
char *dir_name = dirname(strdup(file_name));
file_list_count = scandir(dir_name, &name_list, image_filter, alphasort);
if (file_list_count < 0) {
return -1;
}
file_list = malloc(file_list_count * sizeof(char *));
char *file_basename = basename(strdup(file_name));
int i = 0;
while (i < file_list_count) {
if (!strcmp(file_basename, name_list[i]->d_name))
curr_file_index = i;
file_list[i] = g_build_filename(dir_name, name_list[i]->d_name, NULL);
free(name_list[i]);
i++;
}
free(name_list);
return 0;
}
char *get_next_file()
{
if (curr_file_index >= file_list_count - 1)
return NULL;
return file_list[++curr_file_index];
}
char *get_prev_file()
{
if (curr_file_index <= 0)
return NULL;
return file_list[--curr_file_index];
}
char *get_first_file()
{
if (curr_file_index == 0)
return NULL;
curr_file_index = 0;
return file_list[curr_file_index];
}
char *get_last_file()
{
if (curr_file_index == file_list_count - 1)
return NULL;
curr_file_index = file_list_count - 1;
return file_list[curr_file_index];
}
void clean()
{
for (int i = 0; i < file_list_count; ++i) {
g_free(file_list[i]);
}
g_free(file_list);
}
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