Nuklear/demo/common/file_browser.c

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C
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#include <string.h> // strcpy, strlen
#ifdef __unix__
#include <dirent.h>
#include <unistd.h>
#endif
#ifndef _WIN32
# include <pwd.h>
#endif
struct icons {
struct nk_image desktop;
struct nk_image home;
struct nk_image computer;
struct nk_image directory;
struct nk_image default_file;
struct nk_image text_file;
struct nk_image music_file;
struct nk_image font_file;
struct nk_image img_file;
struct nk_image movie_file;
};
enum file_groups {
FILE_GROUP_DEFAULT,
FILE_GROUP_TEXT,
FILE_GROUP_MUSIC,
FILE_GROUP_FONT,
FILE_GROUP_IMAGE,
FILE_GROUP_MOVIE,
FILE_GROUP_MAX
};
enum file_types {
FILE_DEFAULT,
FILE_TEXT,
FILE_C_SOURCE,
FILE_CPP_SOURCE,
FILE_HEADER,
FILE_CPP_HEADER,
FILE_MP3,
FILE_WAV,
FILE_OGG,
FILE_TTF,
FILE_BMP,
FILE_PNG,
FILE_JPEG,
FILE_PCX,
FILE_TGA,
FILE_GIF,
FILE_MAX
};
struct file_group {
enum file_groups group;
const char *name;
struct nk_image *icon;
};
struct file {
enum file_types type;
const char *suffix;
enum file_groups group;
};
struct media {
int font;
int icon_sheet;
struct icons icons;
struct file_group group[FILE_GROUP_MAX];
struct file files[FILE_MAX];
};
#define MAX_PATH_LEN 512
struct file_browser {
/* path */
char file[MAX_PATH_LEN];
char home[MAX_PATH_LEN];
char desktop[MAX_PATH_LEN];
char directory[MAX_PATH_LEN];
/* directory content */
char **files;
char **directories;
size_t file_count;
size_t dir_count;
struct media *media;
};
static void
die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fputs("\n", stderr);
exit(EXIT_FAILURE);
}
static struct nk_image
icon_load(const char *filename)
{
int x,y,n;
GLuint tex;
unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
if (!data) die("[SDL]: failed to load image: %s", filename);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
glGenerateMipmap(GL_TEXTURE_2D);
stbi_image_free(data);
return nk_image_id((int)tex);
}
#if 0
static char*
file_load(const char* path, size_t* siz)
{
char *buf;
FILE *fd = fopen(path, "rb");
if (!fd) die("Failed to open file: %s\n", path);
fseek(fd, 0, SEEK_END);
*siz = (size_t)ftell(fd);
fseek(fd, 0, SEEK_SET);
buf = (char*)calloc(*siz, 1);
fread(buf, *siz, 1, fd);
fclose(fd);
return buf;
}
#endif
static char*
str_duplicate(const char *src)
{
char *ret;
size_t len = strlen(src);
if (!len) return 0;
ret = (char*)malloc(len+1);
if (!ret) return 0;
memcpy(ret, src, len);
ret[len] = '\0';
return ret;
}
static void
dir_free_list(char **list, size_t size)
{
size_t i;
for (i = 0; i < size; ++i)
free(list[i]);
free(list);
}
static char**
dir_list(const char *dir, int return_subdirs, size_t *count)
{
size_t n = 0;
char buffer[MAX_PATH_LEN];
char **results = NULL;
const DIR *none = NULL;
size_t capacity = 32;
size_t size;
DIR *z;
assert(dir);
assert(count);
strncpy(buffer, dir, MAX_PATH_LEN);
buffer[MAX_PATH_LEN - 1] = 0;
n = strlen(buffer);
if (n > 0 && (buffer[n-1] != '/'))
buffer[n++] = '/';
size = 0;
z = opendir(dir);
if (z != none) {
int nonempty = 1;
struct dirent *data = readdir(z);
nonempty = (data != NULL);
if (!nonempty) return NULL;
do {
DIR *y;
char *p;
int is_subdir;
if (data->d_name[0] == '.')
continue;
strncpy(buffer + n, data->d_name, MAX_PATH_LEN-n);
y = opendir(buffer);
is_subdir = (y != NULL);
if (y != NULL) closedir(y);
if ((return_subdirs && is_subdir) || (!is_subdir && !return_subdirs)){
if (!size) {
results = (char**)calloc(sizeof(char*), capacity);
} else if (size >= capacity) {
void *old = results;
capacity = capacity * 2;
results = (char**)realloc(results, capacity * sizeof(char*));
assert(results);
if (!results) free(old);
}
p = str_duplicate(data->d_name);
results[size++] = p;
}
} while ((data = readdir(z)) != NULL);
}
if (z) closedir(z);
*count = size;
return results;
}
static struct file_group
FILE_GROUP(enum file_groups group, const char *name, struct nk_image *icon)
{
struct file_group fg;
fg.group = group;
fg.name = name;
fg.icon = icon;
return fg;
}
static struct file
FILE_DEF(enum file_types type, const char *suffix, enum file_groups group)
{
struct file fd;
fd.type = type;
fd.suffix = suffix;
fd.group = group;
return fd;
}
static struct nk_image*
media_icon_for_file(struct media *media, const char *file)
{
int i = 0;
const char *s = file;
char suffix[4];
int found = 0;
memset(suffix, 0, sizeof(suffix));
/* extract suffix .xxx from file */
while (*s++ != '\0') {
if (found && i < 3)
suffix[i++] = *s;
if (*s == '.') {
if (found){
found = 0;
break;
}
found = 1;
}
}
/* check for all file definition of all groups for fitting suffix*/
for (i = 0; i < FILE_MAX && found; ++i) {
struct file *d = &media->files[i];
{
const char *f = d->suffix;
s = suffix;
while (f && *f && *s && *s == *f) {
s++; f++;
}
/* found correct file definition so */
if (f && *s == '\0' && *f == '\0')
return media->group[d->group].icon;
}
}
return &media->icons.default_file;
}
static void
media_init(struct media *media)
{
/* file groups */
struct icons *icons = &media->icons;
media->group[FILE_GROUP_DEFAULT] = FILE_GROUP(FILE_GROUP_DEFAULT,"default",&icons->default_file);
media->group[FILE_GROUP_TEXT] = FILE_GROUP(FILE_GROUP_TEXT, "textual", &icons->text_file);
media->group[FILE_GROUP_MUSIC] = FILE_GROUP(FILE_GROUP_MUSIC, "music", &icons->music_file);
media->group[FILE_GROUP_FONT] = FILE_GROUP(FILE_GROUP_FONT, "font", &icons->font_file);
media->group[FILE_GROUP_IMAGE] = FILE_GROUP(FILE_GROUP_IMAGE, "image", &icons->img_file);
media->group[FILE_GROUP_MOVIE] = FILE_GROUP(FILE_GROUP_MOVIE, "movie", &icons->movie_file);
/* files */
media->files[FILE_DEFAULT] = FILE_DEF(FILE_DEFAULT, NULL, FILE_GROUP_DEFAULT);
media->files[FILE_TEXT] = FILE_DEF(FILE_TEXT, "txt", FILE_GROUP_TEXT);
media->files[FILE_C_SOURCE] = FILE_DEF(FILE_C_SOURCE, "c", FILE_GROUP_TEXT);
media->files[FILE_CPP_SOURCE] = FILE_DEF(FILE_CPP_SOURCE, "cpp", FILE_GROUP_TEXT);
media->files[FILE_HEADER] = FILE_DEF(FILE_HEADER, "h", FILE_GROUP_TEXT);
media->files[FILE_CPP_HEADER] = FILE_DEF(FILE_HEADER, "hpp", FILE_GROUP_TEXT);
media->files[FILE_MP3] = FILE_DEF(FILE_MP3, "mp3", FILE_GROUP_MUSIC);
media->files[FILE_WAV] = FILE_DEF(FILE_WAV, "wav", FILE_GROUP_MUSIC);
media->files[FILE_OGG] = FILE_DEF(FILE_OGG, "ogg", FILE_GROUP_MUSIC);
media->files[FILE_TTF] = FILE_DEF(FILE_TTF, "ttf", FILE_GROUP_FONT);
media->files[FILE_BMP] = FILE_DEF(FILE_BMP, "bmp", FILE_GROUP_IMAGE);
media->files[FILE_PNG] = FILE_DEF(FILE_PNG, "png", FILE_GROUP_IMAGE);
media->files[FILE_JPEG] = FILE_DEF(FILE_JPEG, "jpg", FILE_GROUP_IMAGE);
media->files[FILE_PCX] = FILE_DEF(FILE_PCX, "pcx", FILE_GROUP_IMAGE);
media->files[FILE_TGA] = FILE_DEF(FILE_TGA, "tga", FILE_GROUP_IMAGE);
media->files[FILE_GIF] = FILE_DEF(FILE_GIF, "gif", FILE_GROUP_IMAGE);
}
static void
file_browser_reload_directory_content(struct file_browser *browser, const char *path)
{
strncpy(browser->directory, path, MAX_PATH_LEN);
browser->directory[MAX_PATH_LEN - 1] = 0;
dir_free_list(browser->files, browser->file_count);
dir_free_list(browser->directories, browser->dir_count);
browser->files = dir_list(path, 0, &browser->file_count);
browser->directories = dir_list(path, 1, &browser->dir_count);
}
static void
file_browser_init(struct file_browser *browser, struct media *media)
{
memset(browser, 0, sizeof(*browser));
browser->media = media;
{
/* load files and sub-directory list */
const char *home = getenv("HOME");
#ifdef _WIN32
if (!home) home = getenv("USERPROFILE");
#else
if (!home) home = getpwuid(getuid())->pw_dir;
{
size_t l;
strncpy(browser->home, home, MAX_PATH_LEN);
browser->home[MAX_PATH_LEN - 1] = 0;
l = strlen(browser->home);
strcpy(browser->home + l, "/");
strcpy(browser->directory, browser->home);
}
#endif
{
size_t l;
strcpy(browser->desktop, browser->home);
l = strlen(browser->desktop);
strcpy(browser->desktop + l, "desktop/");
}
browser->files = dir_list(browser->directory, 0, &browser->file_count);
browser->directories = dir_list(browser->directory, 1, &browser->dir_count);
}
}
static void
file_browser_free(struct file_browser *browser)
{
if (browser->files)
dir_free_list(browser->files, browser->file_count);
if (browser->directories)
dir_free_list(browser->directories, browser->dir_count);
browser->files = NULL;
browser->directories = NULL;
memset(browser, 0, sizeof(*browser));
}
int cmp_fn(const void *str1, const void *str2)
{
const char *str1_ret = *(const char **)str1;
const char *str2_ret = *(const char **)str2;
return nk_stricmp(str1_ret, str2_ret);
}
static int
file_browser_run(struct file_browser *browser, struct nk_context *ctx)
{
int ret = 0;
struct media *media = browser->media;
struct nk_rect total_space;
static nk_bool file_browser_is_open = nk_true;
if (file_browser_is_open)
{
if (nk_begin(ctx, "File Browser", nk_rect(50, 50, 600, 400),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|NK_WINDOW_NO_SCROLLBAR|
NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
static float ratio[] = {0.25f, NK_UNDEFINED};
float spacing_x = ctx->style.window.spacing.x;
/* output path directory selector in the menubar */
ctx->style.window.spacing.x = 0;
nk_menubar_begin(ctx);
{
char *d = browser->directory;
char *begin = d + 1;
nk_layout_row_dynamic(ctx, 25, 6);
while (*d++) {
if (*d == '/') {
*d = '\0';
if (nk_button_label(ctx, begin)) {
*d++ = '/'; *d = '\0';
file_browser_reload_directory_content(browser, browser->directory);
break;
}
*d = '/';
begin = d + 1;
}
}
}
nk_menubar_end(ctx);
ctx->style.window.spacing.x = spacing_x;
/* window layout */
total_space = nk_window_get_content_region(ctx);
nk_layout_row(ctx, NK_DYNAMIC, total_space.h - 40, 2, ratio);
nk_group_begin(ctx, "Special", NK_WINDOW_NO_SCROLLBAR);
{
struct nk_image home = media->icons.home;
struct nk_image desktop = media->icons.desktop;
struct nk_image computer = media->icons.computer;
nk_layout_row_dynamic(ctx, 40, 1);
if (nk_button_image_label(ctx, home, "home", NK_TEXT_CENTERED))
file_browser_reload_directory_content(browser, browser->home);
if (nk_button_image_label(ctx,desktop,"desktop",NK_TEXT_CENTERED))
file_browser_reload_directory_content(browser, browser->desktop);
if (nk_button_image_label(ctx,computer,"computer",NK_TEXT_CENTERED))
file_browser_reload_directory_content(browser, "/");
nk_group_end(ctx);
}
/* output directory content window */
nk_group_begin(ctx, "Content", NK_WINDOW_BORDER);
{
int index = -1;
size_t i = 0, j = 0;
size_t rows = 0, cols = 0;
size_t count = browser->dir_count + browser->file_count;
/* File icons layout */
cols = 2;
rows = count / cols;
static float ratio2[] = {0.08f, NK_UNDEFINED};
nk_layout_row(ctx, NK_DYNAMIC, 30, 2, ratio2);
for (i = 0; i <= rows; i += 1) {
size_t n = j + cols;
for (; j < count && j < n; ++j) {
/* draw one column of icons */
if (j < browser->dir_count) {
/* draw and execute directory buttons */
if (nk_button_image(ctx,media->icons.directory))
index = (int)j;
qsort(browser->directories, browser->dir_count, sizeof(char *), cmp_fn);
nk_label(ctx, browser->directories[j], NK_TEXT_LEFT);
} else {
/* draw and execute files buttons */
struct nk_image *icon;
size_t fileIndex = ((size_t)j - browser->dir_count);
icon = media_icon_for_file(media,browser->files[fileIndex]);
if (nk_button_image(ctx, *icon)) {
strncpy(browser->file, browser->directory, MAX_PATH_LEN);
n = strlen(browser->file);
strncpy(browser->file + n, browser->files[fileIndex], MAX_PATH_LEN - n);
ret = 1;
}
}
/* draw one column of labels */
if (j >= browser->dir_count) {
size_t t = j - browser->dir_count;
qsort(browser->files, browser->file_count, sizeof(char *), cmp_fn);
nk_label(ctx,browser->files[t],NK_TEXT_LEFT);
}
}
}
if (index != -1) {
size_t n = strlen(browser->directory);
strncpy(browser->directory + n, browser->directories[index], MAX_PATH_LEN - n);
n = strlen(browser->directory);
if (n < MAX_PATH_LEN - 1) {
browser->directory[n] = '/';
browser->directory[n+1] = '\0';
}
file_browser_reload_directory_content(browser, browser->directory);
}
nk_group_end(ctx);
}
nk_layout_row_dynamic(ctx, 30, 5);
nk_label(ctx,"",NK_TEXT_LEFT);
nk_label(ctx,"",NK_TEXT_LEFT);
nk_label(ctx,"",NK_TEXT_LEFT);
if(nk_button_label(ctx, "Cancel"))
{
fprintf(stdout, "File dialog has been closed!\n");
file_browser_is_open = nk_false;
}
if(nk_button_label(ctx, "Open"))
fprintf(stdout, "Insert routine to open/save the file!\n");
}
nk_end(ctx);
}
return ret;
}