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-rw-r--r--sfm-0.4/termbox.c1509
1 files changed, 1509 insertions, 0 deletions
diff --git a/sfm-0.4/termbox.c b/sfm-0.4/termbox.c
new file mode 100644
index 0000000..1c7bfdd
--- /dev/null
+++ b/sfm-0.4/termbox.c
@@ -0,0 +1,1509 @@
+#if defined(__linux__)
+#define _GNU_SOURCE
+#elif defined(__APPLE__)
+#define _DARWIN_C_SOURCE
+#elif defined(__FreeBSD__)
+#define __BSD_VISIBLE 1
+#endif
+#include "termbox.h"
+
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#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 <termios.h>
+#include <unistd.h>
+#include <wchar.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 in)
+{
+ 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 (in & 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 (in & 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, in);
+ }
+ 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;
+ case TB_OUTPUT_NORMAL:
+ default:
+ WRITE_LITERAL("\033[");
+ if (fg != TB_DEFAULT) {
+ WRITE_LITERAL("3");
+ WRITE_INT(fg - 1);
+ if (bg != TB_DEFAULT) {
+ WRITE_LITERAL(";");
+ }
+ }
+ if (bg != TB_DEFAULT) {
+ WRITE_LITERAL("4");
+ WRITE_INT(bg - 1);
+ }
+ WRITE_LITERAL("m");
+ break;
+ }
+}
+
+static void
+cellbuf_init(struct cellbuf *buf, int width, int height)
+{
+ buf->cells = (struct tb_cell *)malloc(
+ sizeof(struct tb_cell) * width * height);
+ assert(buf->cells);
+ buf->width = width;
+ buf->height = height;
+}
+
+static void
+cellbuf_resize(struct cellbuf *buf, int width, int height)
+{
+ if (buf->width == width && buf->height == height)
+ return;
+
+ int oldw = buf->width;
+ int oldh = buf->height;
+ struct tb_cell *oldcells = buf->cells;
+
+ cellbuf_init(buf, width, height);
+ cellbuf_clear(buf);
+
+ int minw = (width < oldw) ? width : oldw;
+ int minh = (height < oldh) ? height : oldh;
+ int i;
+
+ for (i = 0; i < minh; ++i) {
+ struct tb_cell *csrc = oldcells + (i * oldw);
+ struct tb_cell *cdst = buf->cells + (i * width);
+ memcpy(cdst, csrc, sizeof(struct tb_cell) * minw);
+ }
+
+ free(oldcells);
+}
+
+static void
+cellbuf_clear(struct cellbuf *buf)
+{
+ int i;
+ int ncells = buf->width * buf->height;
+
+ for (i = 0; i < ncells; ++i) {
+ buf->cells[i].ch = ' ';
+ buf->cells[i].fg = foreground;
+ buf->cells[i].bg = background;
+ }
+}
+
+static void
+cellbuf_free(struct cellbuf *buf)
+{
+ free(buf->cells);
+}
+
+static void
+get_term_size(int *w, int *h)
+{
+ struct winsize sz;
+ memset(&sz, 0, sizeof(sz));
+
+ ioctl(inout, TIOCGWINSZ, &sz);
+
+ *w = sz.ws_col > 0 ? sz.ws_col : 80;
+ *h = sz.ws_row > 0 ? sz.ws_row : 24;
+}
+
+static void
+update_term_size(void)
+{
+ struct winsize sz;
+ memset(&sz, 0, sizeof(sz));
+
+ ioctl(inout, TIOCGWINSZ, &sz);
+
+ termw = sz.ws_col > 0 ? sz.ws_col : 80;
+ termh = sz.ws_row > 0 ? sz.ws_row : 24;
+}
+
+static void
+send_attr(uint16_t fg, uint16_t bg)
+{
+#define LAST_ATTR_INIT 0xFFFF
+ static uint16_t lastfg = LAST_ATTR_INIT, lastbg = LAST_ATTR_INIT;
+ if (fg != lastfg || bg != lastbg) {
+ bytebuffer_puts(&output_buffer, funcs[T_SGR0]);
+
+ uint16_t fgcol;
+ uint16_t bgcol;
+
+ switch (outputmode) {
+ case TB_OUTPUT_256:
+ fgcol = fg & 0xFF;
+ bgcol = bg & 0xFF;
+ break;
+
+ case TB_OUTPUT_216:
+ fgcol = fg & 0xFF;
+ if (fgcol > 215)
+ fgcol = 7;
+ bgcol = bg & 0xFF;
+ if (bgcol > 215)
+ bgcol = 0;
+ fgcol += 0x10;
+ bgcol += 0x10;
+ break;
+
+ case TB_OUTPUT_GRAYSCALE:
+ fgcol = fg & 0xFF;
+ if (fgcol > 23)
+ fgcol = 23;
+ bgcol = bg & 0xFF;
+ if (bgcol > 23)
+ bgcol = 0;
+ fgcol += 0xe8;
+ bgcol += 0xe8;
+ break;
+
+ case TB_OUTPUT_NORMAL:
+ default:
+ fgcol = fg & 0x0F;
+ bgcol = bg & 0x0F;
+ }
+
+ if (fg & TB_BOLD)
+ bytebuffer_puts(&output_buffer, funcs[T_BOLD]);
+ if (bg & TB_BOLD)
+ bytebuffer_puts(&output_buffer, funcs[T_BLINK]);
+ if (fg & TB_UNDERLINE)
+ bytebuffer_puts(&output_buffer, funcs[T_UNDERLINE]);
+ if ((fg & TB_REVERSE) || (bg & TB_REVERSE))
+ bytebuffer_puts(&output_buffer, funcs[T_REVERSE]);
+
+ write_sgr(fgcol, bgcol);
+
+ lastfg = fg;
+ lastbg = bg;
+ }
+}
+
+static void
+send_char(int x, int y, uint32_t c)
+{
+ char buf[7];
+ int bw = tb_utf8_unicode_to_char(buf, c);
+ if (x - 1 != lastx || y != lasty)
+ write_cursor(x, y);
+ lastx = x;
+ lasty = y;
+ if (!c)
+ buf[0] = ' '; // replace 0 with whitespace
+ bytebuffer_append(&output_buffer, buf, bw);
+}
+
+static void
+send_clear(void)
+{
+ send_attr(foreground, background);
+ bytebuffer_puts(&output_buffer, funcs[T_CLEAR_SCREEN]);
+ if (!IS_CURSOR_HIDDEN(cursor_x, cursor_y))
+ write_cursor(cursor_x, cursor_y);
+ bytebuffer_flush(&output_buffer, inout);
+
+ /* we need to invalidate cursor position too and these two vars are
+ * used only for simple cursor positioning optimization, cursor
+ * actually may be in the correct place, but we simply discard
+ * optimization once and it gives us simple solution for the case when
+ * cursor moved */
+ lastx = LAST_COORD_INIT;
+ lasty = LAST_COORD_INIT;
+}
+
+static void
+sigwinch_handler(int xxx)
+{
+ (void)xxx;
+ const int zzz = 1;
+ write(winch_fds[1], &zzz, sizeof(int));
+}
+
+static void
+update_size(void)
+{
+ update_term_size();
+ cellbuf_resize(&back_buffer, termw, termh);
+ cellbuf_resize(&front_buffer, termw, termh);
+ cellbuf_clear(&front_buffer);
+ send_clear();
+}
+
+static int
+read_up_to(int n)
+{
+ assert(n > 0);
+ const int prevlen = input_buffer.len;
+ bytebuffer_resize(&input_buffer, prevlen + n);
+
+ int read_n = 0;
+ while (read_n <= n) {
+ ssize_t r = 0;
+ if (read_n < n) {
+ r = read(inout, input_buffer.buf + prevlen + read_n,
+ n - read_n);
+ }
+#ifdef __CYGWIN__
+ // While linux man for tty says when VMIN == 0 && VTIME == 0, read
+ // should return 0 when there is nothing to read, cygwin's read returns
+ // -1. Not sure why and if it's correct to ignore it, but let's pretend
+ // it's zero.
+ if (r < 0)
+ r = 0;
+#endif
+ if (r < 0) {
+ // EAGAIN / EWOULDBLOCK shouldn't occur here
+ assert(errno != EAGAIN && errno != EWOULDBLOCK);
+ return -1;
+ } else if (r > 0) {
+ read_n += r;
+ } else {
+ bytebuffer_resize(&input_buffer, prevlen + read_n);
+ return read_n;
+ }
+ }
+ assert(!"unreachable");
+ return 0;
+}
+
+static int
+wait_fill_event(struct tb_event *event, struct timeval *timeout)
+{
+ // ;-)
+#define ENOUGH_DATA_FOR_PARSING 64
+ fd_set events;
+ memset(event, 0, sizeof(struct tb_event));
+
+ // try to extract event from input buffer, return on success
+ event->type = TB_EVENT_KEY;
+ if (extract_event(event, &input_buffer, inputmode))
+ return event->type;
+
+ // it looks like input buffer is incomplete, let's try the short path,
+ // but first make sure there is enough space
+ int n = read_up_to(ENOUGH_DATA_FOR_PARSING);
+ if (n < 0)
+ return -1;
+ if (n > 0 && extract_event(event, &input_buffer, inputmode))
+ return event->type;
+
+ // n == 0, or not enough data, let's go to select
+ while (1) {
+ FD_ZERO(&events);
+ FD_SET(inout, &events);
+ FD_SET(winch_fds[0], &events);
+ int maxfd = (winch_fds[0] > inout) ? winch_fds[0] : inout;
+ int result = select(maxfd + 1, &events, 0, 0, timeout);
+ if (!result)
+ return 0;
+
+ if (FD_ISSET(inout, &events)) {
+ event->type = TB_EVENT_KEY;
+ n = read_up_to(ENOUGH_DATA_FOR_PARSING);
+ if (n < 0)
+ return -1;
+
+ if (n == 0)
+ continue;
+
+ if (extract_event(event, &input_buffer, inputmode))
+ return event->type;
+ }
+ if (FD_ISSET(winch_fds[0], &events)) {
+ event->type = TB_EVENT_RESIZE;
+ int zzz = 0;
+ read(winch_fds[0], &zzz, sizeof(int));
+ buffer_size_change_request = 1;
+ get_term_size(&event->w, &event->h);
+ return TB_EVENT_RESIZE;
+ }
+ }
+}
+
+static void
+bytebuffer_reserve(struct bytebuffer *b, int cap)
+{
+ if (b->cap >= cap) {
+ return;
+ }
+
+ // prefer doubling capacity
+ if (b->cap * 2 >= cap) {
+ cap = b->cap * 2;
+ }
+
+ char *newbuf = realloc(b->buf, cap);
+ b->buf = newbuf;
+ b->cap = cap;
+}
+
+static void
+bytebuffer_init(struct bytebuffer *b, int cap)
+{
+ b->cap = 0;
+ b->len = 0;
+ b->buf = 0;
+
+ if (cap > 0) {
+ b->cap = cap;
+ b->buf = malloc(cap); // just assume malloc works always
+ }
+}
+
+static void
+bytebuffer_free(struct bytebuffer *b)
+{
+ if (b->buf)
+ free(b->buf);
+}
+
+static void
+bytebuffer_clear(struct bytebuffer *b)
+{
+ b->len = 0;
+}
+
+static void
+bytebuffer_append(struct bytebuffer *b, const char *data, int len)
+{
+ bytebuffer_reserve(b, b->len + len);
+ memcpy(b->buf + b->len, data, len);
+ b->len += len;
+}
+
+static void
+bytebuffer_puts(struct bytebuffer *b, const char *str)
+{
+ bytebuffer_append(b, str, strlen(str));
+}
+
+static void
+bytebuffer_resize(struct bytebuffer *b, int len)
+{
+ bytebuffer_reserve(b, len);
+ b->len = len;
+}
+
+static void
+bytebuffer_flush(struct bytebuffer *b, int fd)
+{
+ write(fd, b->buf, b->len);
+ bytebuffer_clear(b);
+}
+
+static void
+bytebuffer_truncate(struct bytebuffer *b, int n)
+{
+ if (n <= 0)
+ return;
+ if (n > b->len)
+ n = b->len;
+ const int nmove = b->len - n;
+ memmove(b->buf, b->buf + n, nmove);
+ b->len -= n;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-02 22:23:52 +0000