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/* Copyright (c) 2015 Harry Jeffery
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 2
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "navigator.h"
#include <sys/stat.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void imv_init_navigator(struct imv_navigator *nav)
{
nav->buf_size = 512;
nav->paths = (char **)malloc(sizeof(char*) * nav->buf_size);
nav->num_paths = 0;
nav->cur_path = 0;
nav->last_move_direction = 1;
nav->changed = 0;
}
void imv_destroy_navigator(struct imv_navigator *nav)
{
if(nav->buf_size > 0) {
free(nav->paths);
nav->paths = NULL;
nav->buf_size = 0;
}
nav->num_paths = 0;
}
int imv_can_load_image(const char* path);
static void add_item(struct imv_navigator *nav, const char *path)
{
if(!imv_can_load_image(path)) {
return;
}
if(nav->buf_size == nav->num_paths) {
int new_buf_size = nav->buf_size * 2;
char **new_paths = malloc(sizeof(char*) * new_buf_size);
memcpy(new_paths, nav->paths, sizeof(char*) * nav->buf_size);
free(nav->paths);
nav->paths = new_paths;
nav->buf_size = new_buf_size;
}
nav->paths[nav->num_paths] = strdup(path);
nav->num_paths += 1;
if(nav->num_paths == 1) {
nav->changed = 1;
}
}
void imv_navigator_add_path(struct imv_navigator *nav, const char *path)
{
char path_buf[512];
struct stat path_info;
stat(path, &path_info);
if(S_ISDIR(path_info.st_mode)) {
DIR *d = opendir(path);
if(d) {
struct dirent *dir;
while((dir = readdir(d)) != NULL) {
if(strcmp(dir->d_name, "..") == 0 ||
strcmp(dir->d_name, ".") == 0) {
continue;
}
snprintf(path_buf, sizeof(path_buf), "%s/%s", path, dir->d_name);
add_item(nav, path_buf);
}
closedir(d);
}
} else {
add_item(nav, path);
}
}
void imv_navigator_add_path_recursive(struct imv_navigator *nav, const char *path)
{
char path_buf[512];
struct stat path_info;
stat(path, &path_info);
if(S_ISDIR(path_info.st_mode)) {
DIR *d = opendir(path);
if(d) {
struct dirent *dir;
while((dir = readdir(d)) != NULL) {
if(strcmp(dir->d_name, "..") == 0 ||
strcmp(dir->d_name, ".") == 0) {
continue;
}
snprintf(path_buf, sizeof(path_buf), "%s/%s", path, dir->d_name);
imv_navigator_add_path_recursive(nav, path_buf);
}
closedir(d);
}
} else {
add_item(nav, path);
}
}
const char *imv_navigator_get_current_path(struct imv_navigator *nav)
{
if(nav->num_paths == 0) {
return NULL;
}
return nav->paths[nav->cur_path];
}
void imv_navigator_next_path(struct imv_navigator *nav)
{
int prev_path = nav->cur_path;
if(nav->num_paths == 0) {
return;
}
nav->cur_path += 1;
if(nav->cur_path == nav->num_paths) {
nav->cur_path = 0;
}
nav->last_move_direction = 1;
nav->changed = prev_path != nav->cur_path;
}
void imv_navigator_prev_path(struct imv_navigator *nav)
{
int prev_path = nav->cur_path;
if(nav->num_paths == 0) {
return;
}
nav->cur_path -= 1;
if(nav->cur_path < 0) {
nav->cur_path = nav->num_paths - 1;
}
nav->last_move_direction = -1;
nav->changed = prev_path != nav->cur_path;
}
void imv_navigator_remove_current_path(struct imv_navigator *nav)
{
if(nav->num_paths == 0) {
return;
}
free(nav->paths[nav->cur_path]);
for(int i = nav->cur_path; i < nav->num_paths - 1; ++i) {
nav->paths[i] = nav->paths[i+1];
}
nav->num_paths -= 1;
if(nav->last_move_direction < 0) {
/* Move left */
imv_navigator_prev_path(nav);
} else {
/* Try to stay where we are, unless we ran out of room */
if(nav->cur_path == nav->num_paths) {
nav->cur_path = 0;
}
}
nav->changed = 1;
}
int imv_navigator_has_changed(struct imv_navigator *nav)
{
if(nav->changed) {
nav->changed = 0;
return 1;
} else {
return 0;
}
}
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