ccc/ccc.c
2024-03-09 19:24:38 +01:00

245 lines
6.2 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <linux/limits.h>
#include <dirent.h> /* directories etc. */
#include <ncurses.h>
#include "util.h"
#define ESC 0x1B
typedef struct {
WINDOW *window;
int location;
int y;
int x;
} WIN_STRUCT;
/* functions' definitions */
void list_cwd_files();
void highlight_current_line();
void show_file_content();
long files_len();
void init_windows();
void draw_border_title(WINDOW *window, bool active);
/* global variables */
unsigned int focus = 0;
int current_selection = 0;
char **files;
int halfx;
WIN_STRUCT windows[2];
int main(int argc, char** argv)
{
// check if it is interactive shell
if (!isatty(STDIN_FILENO))
die("ccc: No tty detected. ccc requires an interactive shell to run.\n");
initscr();
noecho();
curs_set(0);
// check terminal has colors
if (!has_colors())
{
endwin();
die("ccc: Color is not supported in your terminal.\n");
}
else {
start_color();
}
init_pair(1, COLOR_BLUE, COLOR_BLACK); // foreground, background
init_pair(2, COLOR_CYAN, COLOR_BLACK); // active color
refresh();
halfx = COLS / 2;
init_windows();
list_cwd_files();
highlight_current_line();
int ch;
while (1)
{
if (COLS < 80 || LINES < 24)
{
endwin();
die("ccc: Terminal size needs to be at least 80x24\n");
}
ch = getch();
if (ch == 'q')
break;
switch (ch)
{
case '.':
list_cwd_files();
break;
case 'h':
case 'l':
if (focus == 0) focus++;
else if (focus == 1) focus--;
break;
case 'k':
if (current_selection > 0) {
current_selection--;
}
highlight_current_line();
break;
case 'j':
if (current_selection < files_len() - 1) {
current_selection++;
}
highlight_current_line();
break;
case 27: // esc
break;
case KEY_RESIZE:
for (int i = 0; i < 2; i++)
{
delwin(windows[i].window);
}
init_windows();
break;
}
}
endwin(); // End curses
return 0;
}
void list_cwd_files()
{
char cwd[PATH_MAX];
getcwd(cwd, sizeof(cwd));
DIR *dp;
struct dirent *ep;
dp = opendir(cwd);
if (dp != NULL)
{
int count = 0;
while ((ep = readdir(dp)) != NULL) {
char *filename = strdup(ep->d_name);
if (!filename)
{
perror("ccc");
exit(EXIT_FAILURE);
}
// can't be strncmp as that filter out dotfiles
if (strcmp(filename, ".") && strcmp(ep->d_name, ".."))
{
files = rememalloc(files, (count + 1) * sizeof(char *));
files[count] = filename;
mvwprintw(windows[0].window, count + 1, 1, "%s", filename);
count++;
}
}
closedir(dp);
files[count] = NULL;
wrefresh(windows[0].window);
}
else {
perror("ccc");
}
}
void highlight_current_line()
{
for (int i = 0; i < files_len(); i++)
{
if (i == current_selection)
{
wattron(windows[0].window, A_REVERSE);
wattron(windows[0].window, COLOR_PAIR(1));
}
mvwprintw(windows[0].window, i + 1, 1, "%s", files[i]);
wattroff(windows[0].window, A_REVERSE);
wattroff(windows[0].window, COLOR_PAIR(1));
}
wrefresh(windows[0].window);
show_file_content();
}
void show_file_content()
{
FILE *file = fopen(files[current_selection], "rb");
if (file)
{
fseek(file, 0, SEEK_END);
long length = ftell(file);
fseek(file, 0, SEEK_SET);
char *buffer = memalloc(length * sizeof(char));
fread(buffer, 1, length, file);
fclose(file);
mvwprintw(windows[1].window, 1, 1, "%s", buffer);
wrefresh(windows[1].window);
}
}
long files_len() {
long i = 0;
while (files[i] != NULL) {
i++;
}
return i;
}
void init_windows()
{
/*
* ------------------------------/
* | directory(0)/ preview(1) /
* | / /
* | / /
* | / /
* | / /
* |-----------------------------/
*/
// create windows
WINDOW *directory = newwin(LINES, halfx, 0, 0);
WINDOW *preview = newwin(LINES, halfx, 0, halfx);
// draw border around windows
draw_border_title(directory, true);
draw_border_title(preview, false);
/* window location y, x */
windows[0] = (WIN_STRUCT) { directory, 0, 0, 0 };
windows[1] = (WIN_STRUCT) { preview, 1, 0, halfx };
}
/*
* draw the border of the window depends on it is active or not
*/
void draw_border_title(WINDOW *window, bool active)
{
if (active) {
wattron(window, COLOR_PAIR(2));
} else {
wattron(window, COLOR_PAIR(1));
}
// draw top border
mvwaddch(window, 0, 0, ACS_ULCORNER); // upper left corner
mvwhline(window, 0, 1, ACS_HLINE, halfx - 2); // top horizontal line
mvwaddch(window, 0, halfx - 1, ACS_URCORNER); // upper right corner
// draw side border
mvwvline(window, 1, 0, ACS_VLINE, LINES - 2); // left vertical line
mvwvline(window, 1, halfx - 1, ACS_VLINE, LINES - 2); // right vertical line
// draw bottom border
mvwaddch(window, LINES - 1, 0, ACS_LLCORNER); // lower left corner
mvwhline(window, LINES - 1, 1, ACS_HLINE, halfx - 2); // bottom horizontal line
mvwaddch(window, LINES - 1, halfx - 1, ACS_LRCORNER); // lower right corner
if (active) {
wattroff(window, COLOR_PAIR(2));
} else {
wattroff(window, COLOR_PAIR(1));
}
wrefresh(window); // Refresh the window to see the colored border and title
}