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/* Copyright (c) 2015 imv authors
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 <limits.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
void imv_navigator_init(struct imv_navigator *nav)
{
nav->buf_size = 512;
nav->paths = malloc(sizeof(char*) * nav->buf_size);
if (nav->paths == NULL) {
perror("imv_navigator_init");
exit(1);
}
nav->mtimes = malloc(sizeof(time_t) * nav->buf_size);
if (nav->paths == NULL) {
perror("imv_navigator_init");
free(nav->paths);
exit(1);
}
nav->num_paths = 0;
nav->cur_path = 0;
nav->last_move_direction = 1;
nav->changed = 0;
}
void imv_navigator_destroy(struct imv_navigator *nav)
{
if(nav->buf_size > 0) {
free(nav->paths);
nav->paths = NULL;
free(nav->mtimes);
nav->mtimes = NULL;
nav->buf_size = 0;
}
nav->num_paths = 0;
}
static void add_item(struct imv_navigator *nav, const char *path,
time_t mtime)
{
if(nav->buf_size == nav->num_paths) {
char **new_paths;
time_t *new_mtimes;
nav->buf_size *= 2;
new_paths = realloc(nav->paths, sizeof(char*) * nav->buf_size);
new_mtimes = realloc(nav->mtimes, sizeof(time_t) * nav->buf_size);
if (new_paths == NULL || new_mtimes == NULL) {
perror("add_item");
free(nav->paths);
free(nav->mtimes);
exit(1);
}
nav->paths = new_paths;
nav->mtimes = new_mtimes;
}
nav->paths[nav->num_paths] = strdup(path);
nav->mtimes[nav->num_paths] = mtime;
nav->num_paths += 1;
if(nav->num_paths == 1) {
nav->changed = 1;
}
}
void imv_navigator_add(struct imv_navigator *nav, const char *path,
int recursive)
{
char path_buf[PATH_MAX];
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);
if(recursive) {
imv_navigator_add(nav, path_buf, recursive);
} else {
add_item(nav, path_buf, path_info.st_mtim.tv_sec);
}
}
closedir(d);
}
} else {
add_item(nav, path, path_info.st_mtim.tv_sec);
}
}
const char *imv_navigator_selection(struct imv_navigator *nav)
{
if(nav->num_paths == 0) {
return NULL;
}
return nav->paths[nav->cur_path];
}
void imv_navigator_select_rel(struct imv_navigator *nav, int direction)
{
int prev_path = nav->cur_path;
if(nav->num_paths == 0) {
return;
}
if(direction > 1) {
direction = 1;
} else if(direction < -1) {
direction = -1;
} else if(direction == 0) {
return;
}
nav->cur_path += direction;
if(nav->cur_path == nav->num_paths) {
nav->cur_path = 0;
} else if(nav->cur_path < 0) {
nav->cur_path = nav->num_paths - 1;
}
nav->last_move_direction = direction;
nav->changed = prev_path != nav->cur_path;
}
void imv_navigator_remove(struct imv_navigator *nav, const char *path)
{
int removed = -1;
for(int i = 0; i < nav->num_paths; ++i) {
if(strcmp(path, nav->paths[i]) == 0) {
removed = i;
free(nav->paths[i]);
break;
}
}
if(removed == -1) {
return;
}
for(int i = removed; i < nav->num_paths - 1; ++i) {
nav->paths[i] = nav->paths[i+1];
}
nav->num_paths -= 1;
if(nav->cur_path == removed) {
/* We just removed the current path */
if(nav->last_move_direction < 0) {
/* Move left */
imv_navigator_select_rel(nav, -1);
} 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;
}
void imv_navigator_select_str(struct imv_navigator *nav, const int path)
{
if(path <= 0 || path >= nav->num_paths) {
return;
}
int prev_path = nav->cur_path;
nav->cur_path = path;
nav->changed = prev_path != nav->cur_path;
}
int imv_navigator_find_path(struct imv_navigator *nav, const char *path)
{
/* first try to match the exact path */
for(int i = 0; i < nav->num_paths; ++i) {
if(strcmp(path, nav->paths[i]) == 0) {
return i;
}
}
/* no exact matches, try the final portion of the path */
for(int i = 0; i < nav->num_paths; ++i) {
char *last_sep = strrchr(nav->paths[i], '/');
if(last_sep && strcmp(last_sep+1, path) == 0) {
return i;
}
}
/* no matches at all, give up */
return -1;
}
int imv_navigator_poll_changed(struct imv_navigator *nav, const int nopoll)
{
if(nav->changed) {
nav->changed = 0;
return 1;
}
if(!nopoll) {
struct stat file_info;
if(stat(nav->paths[nav->cur_path], &file_info) == -1) {
return 0;
}
if(nav->mtimes[nav->cur_path] != file_info.st_mtim.tv_sec) {
nav->mtimes[nav->cur_path] = file_info.st_mtim.tv_sec;
return 1;
}
}
return 0;
}
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