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/* Copyright (C) 2019 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _XOPEN_SOURCE_EXTENDED
#include <curses.h>
#include <err.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sysexits.h>
#include <unistd.h>
#include "term.h"
#ifndef A_ITALIC
#define A_ITALIC A_UNDERLINE
#endif
static short colorPair(int bg, int fg) {
if (bg >= COLORS || fg >= COLORS) return 0;
if (bg < 8 && fg < 8) {
return 9 * (bg + 1) + (fg + 1);
}
enum {
Base = 9 * 9,
Ring = 256 - Base,
};
static struct {
int bg, fg;
} pairs[Ring];
static size_t len = 0;
short i;
for (i = 0; i < Ring; ++i) {
if (pairs[i].bg == bg && pairs[i].fg == fg) return Base + i;
if (!pairs[i].bg && !pairs[i].fg) break;
}
i = len++ % Ring;
pairs[i].bg = bg;
pairs[i].fg = fg;
init_pair(Base + i, fg, bg);
touchwin(stdscr);
return Base + i;
}
static void curse(void) {
initscr();
cbreak();
noecho();
start_color();
use_default_colors();
for (int bg = -1; bg < 8; ++bg) {
for (int fg = -1; fg < 8; ++fg) {
init_pair(colorPair(bg, fg), fg, bg);
}
}
}
static attr_t styleAttr(struct Style style) {
attr_t attr = A_NORMAL;
if (style.attr & Bold) attr |= A_BOLD;
if (style.attr & Dim) attr |= A_DIM;
if (style.attr & Italic) attr |= A_ITALIC;
if (style.attr & Underline) attr |= A_UNDERLINE;
if (style.attr & Blink) attr |= A_BLINK;
if (style.attr & Reverse) attr |= A_REVERSE;
return attr;
}
static void render(WINDOW *win, const struct Term *term) {
for (uint y = 0; y < term->rows; ++y) {
for (uint x = 0; x < term->cols; ++x) {
struct Cell cell = term->cells[term->cols * y + x];
if (!cell.ch) continue;
wattr_set(
win,
styleAttr(cell.style),
colorPair(cell.style.bg, cell.style.fg),
NULL
);
mvwaddnwstr(win, y, x, &cell.ch, 1);
}
}
curs_set(!!(term->mode & Cursor));
leaveok(win, !(term->mode & Cursor));
wmove(win, term->y, term->x);
}
int main(void) {
int error;
setlocale(LC_CTYPE, "");
// TODO: Read info from file.
const char *path = "example.sock";
struct Term *term = termAlloc(24, 80);
int client = socket(PF_LOCAL, SOCK_STREAM, 0);
if (client < 0) err(EX_OSERR, "socket");
struct sockaddr_un addr = { .sun_family = AF_LOCAL };
strncpy(addr.sun_path, path, sizeof(addr.sun_path));
error = connect(client, (struct sockaddr *)&addr, SUN_LEN(&addr));
if (error) err(EX_NOINPUT, "%s", path);
curse();
WINDOW *win = newwin(24, 80, 0, 0);
for (;;) {
char buf[4096];
ssize_t len = read(client, buf, sizeof(buf));
if (len < 0) err(EX_IOERR, "read");
ssize_t pos = 0;
while (pos < len) {
wchar_t ch;
int n = mbtowc(&ch, &buf[pos], len - pos);
if (n <= 0) break;
termUpdate(term, ch);
pos += n;
}
render(win, term);
wrefresh(win);
}
}
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