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termbox.c
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termbox.c
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#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <termios.h>
#include <unistd.h>
#include <wchar.h>
#include "termbox.h"
#define ENTER_MOUSE_SEQ "\x1b[?1000h\x1b[?1002h\x1b[?1015h\x1b[?1006h"
#define EXIT_MOUSE_SEQ "\x1b[?1006l\x1b[?1015l\x1b[?1002l\x1b[?1000l"
#define EUNSUPPORTED_TERM -1
#define TI_MAGIC 0432
#define TI_ALT_MAGIC 542
#define TI_HEADER_LENGTH 12
#define TB_KEYS_NUM 22
#define CELL(buf, x, y) (buf)->cells[(y) * (buf)->width + (x)]
#define IS_CURSOR_HIDDEN(cx, cy) (cx == -1 || cy == -1)
#define LAST_COORD_INIT -1
#define WRITE_LITERAL(X) bytebuffer_append(&output_buffer, (X), sizeof(X) - 1)
#define WRITE_INT(X) bytebuffer_append(&output_buffer, buf, convertnum((X), buf))
struct cellbuf {
int width;
int height;
struct tb_cell *cells;
};
struct bytebuffer {
char *buf;
int len;
int cap;
};
enum {
T_ENTER_CA,
T_EXIT_CA,
T_SHOW_CURSOR,
T_HIDE_CURSOR,
T_CLEAR_SCREEN,
T_SGR0,
T_UNDERLINE,
T_BOLD,
T_BLINK,
T_REVERSE,
T_ENTER_KEYPAD,
T_EXIT_KEYPAD,
T_ENTER_MOUSE,
T_EXIT_MOUSE,
T_FUNCS_NUM,
};
static int init_term_builtin(void);
static char *read_file(const char *file);
static char *terminfo_try_path(const char *path, const char *term);
static char *load_terminfo(void);
static const char *terminfo_copy_string(char *data, int str, int table);
static int init_term(void);
static void shutdown_term(void);
static bool starts_with(const char *s1, int len, const char *s2);
static int parse_mouse_event(struct tb_event *event, const char *buf, int len);
static int parse_escape_seq(struct tb_event *event, const char *buf, int len);
static int convertnum(uint32_t num, char *buf);
static void write_cursor(int x, int y);
static void write_sgr(uint16_t fg, uint16_t bg);
static void cellbuf_init(struct cellbuf *buf, int width, int height);
static void cellbuf_resize(struct cellbuf *buf, int width, int height);
static void cellbuf_clear(struct cellbuf *buf);
static void cellbuf_free(struct cellbuf *buf);
static void get_term_size(int *w, int *h);
static void update_term_size(void);
static void send_attr(uint16_t fg, uint16_t bg);
static void send_char(int x, int y, uint32_t c);
static void send_clear(void);
static void sigwinch_handler(int xxx);
static void update_size(void);
static int read_up_to(int n);
static int wait_fill_event(struct tb_event *event, struct timeval *timeout);
static void bytebuffer_reserve(struct bytebuffer *b, int cap);
static void bytebuffer_init(struct bytebuffer *b, int cap);
static void bytebuffer_free(struct bytebuffer *b);
static void bytebuffer_clear(struct bytebuffer *b);
static void bytebuffer_append(struct bytebuffer *b, const char *data, int len);
static void bytebuffer_puts(struct bytebuffer *b, const char *str);
static void bytebuffer_resize(struct bytebuffer *b, int len);
static void bytebuffer_flush(struct bytebuffer *b, int fd);
static void bytebuffer_truncate(struct bytebuffer *b, int n);
static struct termios orig_tios;
static struct cellbuf back_buffer;
static struct cellbuf front_buffer;
static struct bytebuffer output_buffer;
static struct bytebuffer input_buffer;
static int termw = -1;
static int termh = -1;
static int inputmode = TB_INPUT_ESC;
static int outputmode = TB_OUTPUT_NORMAL;
static int inout;
static int winch_fds[2];
static int lastx = LAST_COORD_INIT;
static int lasty = LAST_COORD_INIT;
static int cursor_x = -1;
static int cursor_y = -1;
static uint16_t background = TB_DEFAULT;
static uint16_t foreground = TB_DEFAULT;
/* may happen in a different thread */
static volatile int buffer_size_change_request;
// rxvt-256color
static const char *rxvt_256color_keys[] = {
"\033[11~", "\033[12~", "\033[13~", "\033[14~", "\033[15~", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033[7~", "\033[8~", "\033[5~", "\033[6~",
"\033[A", "\033[B", "\033[D", "\033[C", 0};
static const char *rxvt_256color_funcs[] = {
"\0337\033[?47h", "\033[2J\033[?47l\0338",
"\033[?25h", "\033[?25l",
"\033[H\033[2J", "\033[m",
"\033[4m", "\033[1m",
"\033[5m", "\033[7m",
"\033=", "\033>",
ENTER_MOUSE_SEQ, EXIT_MOUSE_SEQ,
};
// Eterm
static const char *eterm_keys[] = {
"\033[11~", "\033[12~", "\033[13~", "\033[14~", "\033[15~", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033[7~", "\033[8~", "\033[5~", "\033[6~",
"\033[A", "\033[B", "\033[D", "\033[C", 0};
static const char *eterm_funcs[] = {
"\0337\033[?47h",
"\033[2J\033[?47l\0338",
"\033[?25h",
"\033[?25l",
"\033[H\033[2J",
"\033[m",
"\033[4m",
"\033[1m",
"\033[5m",
"\033[7m",
"",
"",
"",
"",
};
// screen
static const char *screen_keys[] = {
"\033OP", "\033OQ", "\033OR", "\033OS", "\033[15~", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033[1~", "\033[4~", "\033[5~", "\033[6~",
"\033OA", "\033OB", "\033OD", "\033OC", 0};
static const char *screen_funcs[] = {
"\033[?1049h", "\033[?1049l", "\033[34h\033[?25h", "\033[?25l",
"\033[H\033[J", "\033[m", "\033[4m", "\033[1m",
"\033[5m", "\033[7m", "\033[?1h\033=", "\033[?1l\033>",
ENTER_MOUSE_SEQ, EXIT_MOUSE_SEQ,
};
// rxvt-unicode
static const char *rxvt_unicode_keys[] = {
"\033[11~", "\033[12~", "\033[13~", "\033[14~", "\033[15~", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033[7~", "\033[8~", "\033[5~", "\033[6~",
"\033[A", "\033[B", "\033[D", "\033[C", 0};
static const char *rxvt_unicode_funcs[] = {
"\033[?1049h", "\033[r\033[?1049l", "\033[?25h", "\033[?25l",
"\033[H\033[2J", "\033[m\033(B", "\033[4m", "\033[1m",
"\033[5m", "\033[7m", "\033=", "\033>",
ENTER_MOUSE_SEQ, EXIT_MOUSE_SEQ,
};
// linux
static const char *linux_keys[] = {
"\033[[A", "\033[[B", "\033[[C", "\033[[D", "\033[[E", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033[1~", "\033[4~", "\033[5~", "\033[6~",
"\033[A", "\033[B", "\033[D", "\033[C", 0};
static const char *linux_funcs[] = {
"",
"",
"\033[?25h\033[?0c",
"\033[?25l\033[?1c",
"\033[H\033[J",
"\033[0;10m",
"\033[4m",
"\033[1m",
"\033[5m",
"\033[7m",
"",
"",
"",
"",
};
// xterm
static const char *xterm_keys[] = {
"\033OP", "\033OQ", "\033OR", "\033OS", "\033[15~", "\033[17~",
"\033[18~", "\033[19~", "\033[20~", "\033[21~", "\033[23~", "\033[24~",
"\033[2~", "\033[3~", "\033OH", "\033OF", "\033[5~", "\033[6~",
"\033OA", "\033OB", "\033OD", "\033OC", 0};
static const char *xterm_funcs[] = {
"\033[?1049h", "\033[?1049l", "\033[?12l\033[?25h",
"\033[?25l", "\033[H\033[2J", "\033(B\033[m",
"\033[4m", "\033[1m", "\033[5m",
"\033[7m", "\033[?1h\033=", "\033[?1l\033>",
ENTER_MOUSE_SEQ, EXIT_MOUSE_SEQ,
};
static struct term {
const char *name;
const char **keys;
const char **funcs;
} terms[] = {
{"rxvt-256color", rxvt_256color_keys, rxvt_256color_funcs},
{"Eterm", eterm_keys, eterm_funcs},
{"screen", screen_keys, screen_funcs},
{"rxvt-unicode", rxvt_unicode_keys, rxvt_unicode_funcs},
{"linux", linux_keys, linux_funcs},
{"xterm", xterm_keys, xterm_funcs},
{0, 0, 0},
};
static bool init_from_terminfo = false;
static const char **keys;
static const char **funcs;
static int try_compatible(const char *term, const char *name,
const char **tkeys, const char **tfuncs) {
if (strstr(term, name)) {
keys = tkeys;
funcs = tfuncs;
return 0;
}
return EUNSUPPORTED_TERM;
}
static int init_term_builtin(void) {
int i;
const char *term = getenv("TERM");
if (term) {
for (i = 0; terms[i].name; i++) {
if (!strcmp(terms[i].name, term)) {
keys = terms[i].keys;
funcs = terms[i].funcs;
return 0;
}
}
/* let's do some heuristic, maybe it's a compatible terminal */
if (try_compatible(term, "xterm", xterm_keys, xterm_funcs) == 0)
return 0;
if (try_compatible(term, "rxvt", rxvt_unicode_keys,
rxvt_unicode_funcs) == 0)
return 0;
if (try_compatible(term, "linux", linux_keys, linux_funcs) == 0)
return 0;
if (try_compatible(term, "Eterm", eterm_keys, eterm_funcs) == 0)
return 0;
if (try_compatible(term, "screen", screen_keys, screen_funcs) == 0)
return 0;
if (try_compatible(term, "tmux", screen_keys, screen_funcs) == 0)
return 0;
/* let's assume that 'cygwin' is xterm compatible */
if (try_compatible(term, "cygwin", xterm_keys, xterm_funcs) == 0)
return 0;
}
return EUNSUPPORTED_TERM;
}
//----------------------------------------------------------------------
// terminfo
//----------------------------------------------------------------------
static char *read_file(const char *file) {
FILE *f = fopen(file, "rb");
if (!f)
return 0;
struct stat st;
if (fstat(fileno(f), &st) != 0) {
fclose(f);
return 0;
}
char *data = malloc(st.st_size);
if (!data) {
fclose(f);
return 0;
}
if (fread(data, 1, st.st_size, f) != (size_t)st.st_size) {
fclose(f);
free(data);
return 0;
}
fclose(f);
return data;
}
static char *terminfo_try_path(const char *path, const char *term) {
char tmp[4096];
snprintf(tmp, sizeof(tmp), "%s/%c/%s", path, term[0], term);
tmp[sizeof(tmp) - 1] = '\0';
char *data = read_file(tmp);
if (data) {
return data;
}
// fallback to darwin specific dirs structure
snprintf(tmp, sizeof(tmp), "%s/%x/%s", path, term[0], term);
tmp[sizeof(tmp) - 1] = '\0';
return read_file(tmp);
}
static char *load_terminfo(void) {
char tmp[4096];
const char *term = getenv("TERM");
if (!term) {
return 0;
}
// if TERMINFO is set, no other directory should be searched
const char *terminfo = getenv("TERMINFO");
if (terminfo) {
return terminfo_try_path(terminfo, term);
}
// next, consider ~/.terminfo
const char *home = getenv("HOME");
if (home) {
snprintf(tmp, sizeof(tmp), "%s/.terminfo", home);
tmp[sizeof(tmp) - 1] = '\0';
char *data = terminfo_try_path(tmp, term);
if (data)
return data;
}
// next, TERMINFO_DIRS
const char *dirs = getenv("TERMINFO_DIRS");
if (dirs) {
snprintf(tmp, sizeof(tmp), "%s", dirs);
tmp[sizeof(tmp) - 1] = '\0';
char *dir = strtok(tmp, ":");
while (dir) {
const char *cdir = dir;
if (strcmp(cdir, "") == 0) {
cdir = "/usr/share/terminfo";
}
char *data = terminfo_try_path(cdir, term);
if (data)
return data;
dir = strtok(0, ":");
}
}
// fallback to /usr/share/terminfo
return terminfo_try_path("/usr/share/terminfo", term);
}
static const char *terminfo_copy_string(char *data, int str, int table) {
const int16_t off = *(int16_t *)(data + str);
const char *src = data + table + off;
int len = strlen(src);
char *dst = malloc(len + 1);
strcpy(dst, src);
return dst;
}
static const int16_t ti_funcs[] = {
28, 40, 16, 13, 5, 39, 36, 27, 26, 34, 89, 88,
};
static const int16_t ti_keys[] = {
66, 68 /* apparently not a typo; 67 is F10 for whatever reason */,
69, 70,
71, 72,
73, 74,
75, 67,
216, 217,
77, 59,
76, 164,
82, 81,
87, 61,
79, 83,
};
static int init_term(void) {
int i;
char *data = load_terminfo();
if (!data) {
init_from_terminfo = false;
return init_term_builtin();
}
int16_t *header = (int16_t *)data;
const int number_sec_len = header[0] == TI_ALT_MAGIC ? 4 : 2;
if ((header[1] + header[2]) % 2) {
// old quirk to align everything on word boundaries
header[2] += 1;
}
const int str_offset =
TI_HEADER_LENGTH + header[1] + header[2] + number_sec_len * header[3];
const int table_offset = str_offset + 2 * header[4];
keys = malloc(sizeof(const char *) * (TB_KEYS_NUM + 1));
for (i = 0; i < TB_KEYS_NUM; i++) {
keys[i] = terminfo_copy_string(data, str_offset + 2 * ti_keys[i],
table_offset);
}
keys[TB_KEYS_NUM] = 0;
funcs = malloc(sizeof(const char *) * T_FUNCS_NUM);
// the last two entries are reserved for mouse. because the table offset is
// not there, the two entries have to fill in manually
for (i = 0; i < T_FUNCS_NUM - 2; i++) {
funcs[i] = terminfo_copy_string(data, str_offset + 2 * ti_funcs[i],
table_offset);
}
funcs[T_FUNCS_NUM - 2] = ENTER_MOUSE_SEQ;
funcs[T_FUNCS_NUM - 1] = EXIT_MOUSE_SEQ;
init_from_terminfo = true;
free(data);
return 0;
}
static void shutdown_term(void) {
if (init_from_terminfo) {
int i;
for (i = 0; i < TB_KEYS_NUM; i++) {
free((void *)keys[i]);
}
// the last two entries are reserved for mouse. because the table offset
// is not there, the two entries have to fill in manually and do not
// need to be freed.
for (i = 0; i < T_FUNCS_NUM - 2; i++) {
free((void *)funcs[i]);
}
free(keys);
free(funcs);
}
}
// if s1 starts with s2 returns true, else false
// len is the length of s1
// s2 should be null-terminated
static bool starts_with(const char *s1, int len, const char *s2) {
int n = 0;
while (*s2 && n < len) {
if (*s1++ != *s2++)
return false;
n++;
}
return *s2 == 0;
}
static int parse_mouse_event(struct tb_event *event, const char *buf, int len) {
if (len >= 6 && starts_with(buf, len, "\033[M")) {
// X10 mouse encoding, the simplest one
// \033 [ M Cb Cx Cy
int b = buf[3] - 32;
switch (b & 3) {
case 0:
if ((b & 64) != 0)
event->key = TB_KEY_MOUSE_WHEEL_UP;
else
event->key = TB_KEY_MOUSE_LEFT;
break;
case 1:
if ((b & 64) != 0)
event->key = TB_KEY_MOUSE_WHEEL_DOWN;
else
event->key = TB_KEY_MOUSE_MIDDLE;
break;
case 2:
event->key = TB_KEY_MOUSE_RIGHT;
break;
case 3:
event->key = TB_KEY_MOUSE_RELEASE;
break;
default:
return -6;
}
event->type = TB_EVENT_MOUSE; // TB_EVENT_KEY by default
if ((b & 32) != 0)
event->mod |= TB_MOD_MOTION;
// the coord is 1,1 for upper left
event->x = (uint8_t)buf[4] - 1 - 32;
event->y = (uint8_t)buf[5] - 1 - 32;
return 6;
} else if (starts_with(buf, len, "\033[<") ||
starts_with(buf, len, "\033[")) {
// xterm 1006 extended mode or urxvt 1015 extended mode
// xterm: \033 [ < Cb ; Cx ; Cy (M or m)
// urxvt: \033 [ Cb ; Cx ; Cy M
int i, mi = -1, starti = -1;
int isM, isU, s1 = -1, s2 = -1;
int n1 = 0, n2 = 0, n3 = 0;
for (i = 0; i < len; i++) {
// We search the first (s1) and the last (s2) ';'
if (buf[i] == ';') {
if (s1 == -1)
s1 = i;
s2 = i;
}
// We search for the first 'm' or 'M'
if ((buf[i] == 'm' || buf[i] == 'M') && mi == -1) {
mi = i;
break;
}
}
if (mi == -1)
return 0;
// whether it's a capital M or not
isM = (buf[mi] == 'M');
if (buf[2] == '<') {
isU = 0;
starti = 3;
} else {
isU = 1;
starti = 2;
}
if (s1 == -1 || s2 == -1 || s1 == s2)
return 0;
n1 = strtoul(&buf[starti], NULL, 10);
n2 = strtoul(&buf[s1 + 1], NULL, 10);
n3 = strtoul(&buf[s2 + 1], NULL, 10);
if (isU)
n1 -= 32;
switch (n1 & 3) {
case 0:
if ((n1 & 64) != 0) {
event->key = TB_KEY_MOUSE_WHEEL_UP;
} else {
event->key = TB_KEY_MOUSE_LEFT;
}
break;
case 1:
if ((n1 & 64) != 0) {
event->key = TB_KEY_MOUSE_WHEEL_DOWN;
} else {
event->key = TB_KEY_MOUSE_MIDDLE;
}
break;
case 2:
event->key = TB_KEY_MOUSE_RIGHT;
break;
case 3:
event->key = TB_KEY_MOUSE_RELEASE;
break;
default:
return mi + 1;
}
if (!isM) {
// on xterm mouse release is signaled by lowercase m
event->key = TB_KEY_MOUSE_RELEASE;
}
event->type = TB_EVENT_MOUSE; // TB_EVENT_KEY by default
if ((n1 & 32) != 0)
event->mod |= TB_MOD_MOTION;
event->x = (uint8_t)n2 - 1;
event->y = (uint8_t)n3 - 1;
return mi + 1;
}
return 0;
}
// convert escape sequence to event, and return consumed bytes on success
// (failure == 0)
static int parse_escape_seq(struct tb_event *event, const char *buf, int len) {
int mouse_parsed = parse_mouse_event(event, buf, len);
if (mouse_parsed != 0)
return mouse_parsed;
// it's pretty simple here, find 'starts_with' match and return
// success, else return failure
int i;
for (i = 0; keys[i]; i++) {
if (starts_with(buf, len, keys[i])) {
event->ch = 0;
event->key = 0xFFFF - i;
return strlen(keys[i]);
}
}
return 0;
}
static bool extract_event(struct tb_event *event, struct bytebuffer *inbuf,
int inputmode) {
const char *buf = inbuf->buf;
const int len = inbuf->len;
if (len == 0)
return false;
if (buf[0] == '\033') {
int n = parse_escape_seq(event, buf, len);
if (n != 0) {
bool success = true;
if (n < 0) {
success = false;
n = -n;
}
bytebuffer_truncate(inbuf, n);
return success;
} else {
// it's not escape sequence, then it's ALT or ESC,
// check inputmode
if (inputmode & TB_INPUT_ESC) {
// if we're in escape mode, fill ESC event, pop
// buffer, return success
event->ch = 0;
event->key = TB_KEY_ESC;
event->mod = 0;
bytebuffer_truncate(inbuf, 1);
return true;
} else if (inputmode & TB_INPUT_ALT) {
// if we're in alt mode, set ALT modifier to
// event and redo parsing
event->mod = TB_MOD_ALT;
bytebuffer_truncate(inbuf, 1);
return extract_event(event, inbuf, inputmode);
}
assert(!"never got here");
}
}
// if we're here, this is not an escape sequence and not an alt sequence
// so, it's a FUNCTIONAL KEY or a UNICODE character
// first of all check if it's a functional key
if ((unsigned char)buf[0] <= TB_KEY_SPACE ||
(unsigned char)buf[0] == TB_KEY_BACKSPACE2) {
// fill event, pop buffer, return success */
event->ch = 0;
event->key = (uint16_t)buf[0];
bytebuffer_truncate(inbuf, 1);
return true;
}
// feh... we got utf8 here
// check if there is all bytes
if (len >= tb_utf8_char_length(buf[0])) {
/* everything ok, fill event, pop buffer, return success */
tb_utf8_char_to_unicode(&event->ch, buf);
event->key = 0;
bytebuffer_truncate(inbuf, tb_utf8_char_length(buf[0]));
return true;
}
// event isn't recognized, perhaps there is not enough bytes in utf8
// sequence
return false;
}
/* -------------------------------------------------------- */
int tb_init_fd(int inout_) {
inout = inout_;
if (inout == -1) {
return TB_EFAILED_TO_OPEN_TTY;
}
if (init_term() < 0) {
close(inout);
return TB_EUNSUPPORTED_TERMINAL;
}
if (pipe(winch_fds) < 0) {
close(inout);
return TB_EPIPE_TRAP_ERROR;
}
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigwinch_handler;
sa.sa_flags = 0;
sigaction(SIGWINCH, &sa, 0);
tcgetattr(inout, &orig_tios);
struct termios tios;
memcpy(&tios, &orig_tios, sizeof(tios));
tios.c_iflag &=
~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
tios.c_oflag &= ~OPOST;
tios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
tios.c_cflag &= ~(CSIZE | PARENB);
tios.c_cflag |= CS8;
tios.c_cc[VMIN] = 0;
tios.c_cc[VTIME] = 0;
tcsetattr(inout, TCSAFLUSH, &tios);
bytebuffer_init(&input_buffer, 128);
bytebuffer_init(&output_buffer, 32 * 1024);
bytebuffer_puts(&output_buffer, funcs[T_ENTER_CA]);
bytebuffer_puts(&output_buffer, funcs[T_ENTER_KEYPAD]);
bytebuffer_puts(&output_buffer, funcs[T_HIDE_CURSOR]);
send_clear();
update_term_size();
cellbuf_init(&back_buffer, termw, termh);
cellbuf_init(&front_buffer, termw, termh);
cellbuf_clear(&back_buffer);
cellbuf_clear(&front_buffer);
return 0;
}
int tb_init_file(const char *name) { return tb_init_fd(open(name, O_RDWR)); }
int tb_init(void) { return tb_init_file("/dev/tty"); }
void tb_shutdown(void) {
if (termw == -1) {
fputs("tb_shutdown() should not be called twice.", stderr);
abort();
}
bytebuffer_puts(&output_buffer, funcs[T_SHOW_CURSOR]);
bytebuffer_puts(&output_buffer, funcs[T_SGR0]);
bytebuffer_puts(&output_buffer, funcs[T_CLEAR_SCREEN]);
bytebuffer_puts(&output_buffer, funcs[T_EXIT_CA]);
bytebuffer_puts(&output_buffer, funcs[T_EXIT_KEYPAD]);
bytebuffer_puts(&output_buffer, funcs[T_EXIT_MOUSE]);
bytebuffer_flush(&output_buffer, inout);
tcsetattr(inout, TCSAFLUSH, &orig_tios);
shutdown_term();
close(inout);
close(winch_fds[0]);
close(winch_fds[1]);
cellbuf_free(&back_buffer);
cellbuf_free(&front_buffer);
bytebuffer_free(&output_buffer);
bytebuffer_free(&input_buffer);
termw = termh = -1;
}
void tb_present(void) {
int x, y, w, i;
struct tb_cell *back, *front;
/* invalidate cursor position */
lastx = LAST_COORD_INIT;
lasty = LAST_COORD_INIT;
if (buffer_size_change_request) {
update_size();
buffer_size_change_request = 0;
}
for (y = 0; y < front_buffer.height; ++y) {
for (x = 0; x < front_buffer.width;) {
back = &CELL(&back_buffer, x, y);
front = &CELL(&front_buffer, x, y);
w = wcwidth(back->ch);
if (w < 1)
w = 1;
if (memcmp(back, front, sizeof(struct tb_cell)) == 0) {
x += w;
continue;
}
memcpy(front, back, sizeof(struct tb_cell));
send_attr(back->fg, back->bg);
if (w > 1 && x >= front_buffer.width - (w - 1)) {
// Not enough room for wide ch, so send spaces
for (i = x; i < front_buffer.width; ++i) {
send_char(i, y, ' ');
}
} else {
send_char(x, y, back->ch);
for (i = 1; i < w; ++i) {
front = &CELL(&front_buffer, x + i, y);
front->ch = 0;
front->fg = back->fg;
front->bg = back->bg;
}
}
x += w;
}
}
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
write_cursor(cursor_x, cursor_y);
bytebuffer_flush(&output_buffer, inout);
}
void tb_set_cursor(int cx, int cy) {
if (IS_CURSOR_HIDDEN(cursor_x, cursor_y) && !IS_CURSOR_HIDDEN(cx, cy))
bytebuffer_puts(&output_buffer, funcs[T_SHOW_CURSOR]);
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y) && IS_CURSOR_HIDDEN(cx, cy))
bytebuffer_puts(&output_buffer, funcs[T_HIDE_CURSOR]);
cursor_x = cx;
cursor_y = cy;
if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
write_cursor(cursor_x, cursor_y);
}
void tb_put_cell(int x, int y, const struct tb_cell *cell) {
if ((unsigned)x >= (unsigned)back_buffer.width)
return;
if ((unsigned)y >= (unsigned)back_buffer.height)
return;
CELL(&back_buffer, x, y) = *cell;
}
void tb_change_cell(int x, int y, uint32_t ch, uint16_t fg, uint16_t bg) {
struct tb_cell c = {ch, fg, bg};
tb_put_cell(x, y, &c);
}
void tb_blit(int x, int y, int w, int h, const struct tb_cell *cells) {
if (x + w < 0 || x >= back_buffer.width)
return;
if (y + h < 0 || y >= back_buffer.height)
return;
int xo = 0, yo = 0, ww = w, hh = h;
if (x < 0) {
xo = -x;
ww -= xo;
x = 0;
}
if (y < 0) {
yo = -y;
hh -= yo;
y = 0;
}
if (ww > back_buffer.width - x)
ww = back_buffer.width - x;
if (hh > back_buffer.height - y)
hh = back_buffer.height - y;
int sy;
struct tb_cell *dst = &CELL(&back_buffer, x, y);
const struct tb_cell *src = cells + yo * w + xo;
size_t size = sizeof(struct tb_cell) * ww;
for (sy = 0; sy < hh; ++sy) {
memcpy(dst, src, size);
dst += back_buffer.width;
src += w;
}
}
struct tb_cell *tb_cell_buffer(void) {
return back_buffer.cells;
}
int tb_poll_event(struct tb_event *event) { return wait_fill_event(event, 0); }
int tb_peek_event(struct tb_event *event, int timeout) {
struct timeval tv;
tv.tv_sec = timeout / 1000;
tv.tv_usec = (timeout - (tv.tv_sec * 1000)) * 1000;
return wait_fill_event(event, &tv);
}
int tb_width(void) { return termw; }
int tb_height(void) { return termh; }
void tb_clear(void) {
if (buffer_size_change_request) {
update_size();
buffer_size_change_request = 0;
}
cellbuf_clear(&back_buffer);
}
int tb_select_input_mode(int mode) {
if (mode) {
if ((mode & (TB_INPUT_ESC | TB_INPUT_ALT)) == 0)
mode |= TB_INPUT_ESC;
/* technically termbox can handle that, but let's be nice and show here
what mode is actually used */
if ((mode & (TB_INPUT_ESC | TB_INPUT_ALT)) ==
(TB_INPUT_ESC | TB_INPUT_ALT))
mode &= ~TB_INPUT_ALT;
inputmode = mode;
if (mode & TB_INPUT_MOUSE) {
bytebuffer_puts(&output_buffer, funcs[T_ENTER_MOUSE]);
bytebuffer_flush(&output_buffer, inout);
} else {
bytebuffer_puts(&output_buffer, funcs[T_EXIT_MOUSE]);
bytebuffer_flush(&output_buffer, inout);
}
}
return inputmode;
}
int tb_select_output_mode(int mode) {
if (mode)
outputmode = mode;
return outputmode;
}
void tb_set_clear_attributes(uint16_t fg, uint16_t bg) {
foreground = fg;
background = bg;
}
/* -------------------------------------------------------- */
static int convertnum(uint32_t num, char *buf) {
int i, l = 0;
int ch;
do {
buf[l++] = '0' + (num % 10);
num /= 10;
} while (num);
for (i = 0; i < l / 2; i++) {
ch = buf[i];
buf[i] = buf[l - 1 - i];
buf[l - 1 - i] = ch;
}
return l;
}
static void write_cursor(int x, int y) {
char buf[32];
WRITE_LITERAL("\033[");
WRITE_INT(y + 1);
WRITE_LITERAL(";");
WRITE_INT(x + 1);
WRITE_LITERAL("H");
}
static void write_sgr(uint16_t fg, uint16_t bg) {
char buf[32];
if (fg == TB_DEFAULT && bg == TB_DEFAULT)
return;
switch (outputmode) {
case TB_OUTPUT_256:
case TB_OUTPUT_216:
case TB_OUTPUT_GRAYSCALE:
WRITE_LITERAL("\033[");
if (fg != TB_DEFAULT) {
WRITE_LITERAL("38;5;");
WRITE_INT(fg);
if (bg != TB_DEFAULT) {
WRITE_LITERAL(";");
}
}
if (bg != TB_DEFAULT) {
WRITE_LITERAL("48;5;");
WRITE_INT(bg);
}
WRITE_LITERAL("m");
break;