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iocurses.c
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/*
* FED - Folding Editor
*
* By Shawn Hargreaves, 1994
*
* See README.TXT for copyright conditions
*
* Curses-specific IO routines (Linux).
*/
#ifndef TARGET_CURSES
#error This file should only be compiled as part of the Curses target
#endif
#include <time.h>
#include <signal.h>
#include <dirent.h>
#include <glob.h>
#include <sys/stat.h>
#include <sys/times.h>
#include <sys/ioctl.h>
#include <sys/kd.h>
#include "fed.h"
int screen_w = 80;
int screen_h = 25;
int term_inited = FALSE;
int dirty = FALSE;
int x_pos = 0, y_pos = 0;
int _x_pos = 0, _y_pos = 0;
int got_color = FALSE;
int attrib = 7;
int norm_attrib = 7;
int cattrib = 0;
int m_x = -1;
int m_y = -1;
int m_b = 0;
int _mouse_x = -1;
int _mouse_y = -1;
int _mouse_b = 0;
int nosleep = FALSE;
#define MAX_ESCAPE 16
int esc_waiting = 0;
char esc_playback[MAX_ESCAPE];
int esc_count = 0;
char esc_buf[MAX_ESCAPE+1];
int modifier_cache = 0;
char orig_title[256] = "";
char my_title[256] = "";
int winched = 0;
void curs_init(int r)
{
int f, b, i;
initscr();
nocbreak();
noecho();
raw();
nonl();
keypad(stdscr, FALSE);
meta(stdscr, TRUE);
nodelay(stdscr, TRUE);
if (has_colors()) {
start_color();
for (i=1; i<COLOR_PAIRS; i++) {
f = (i-1)%COLORS;
b = (i-1)/COLORS;
/* Linux console pallete isn't the same as in DOS */
if (f == 1)
f = 4;
else if (f == 4)
f = 1;
else if (f == 3)
f = 6;
else if (f == 6)
f = 3;
else
f = f;
if (b == 1)
b = 4;
else if (b == 4)
b = 1;
else if (b == 3)
b = 6;
else if (b == 6)
b = 3;
else
b = b;
init_pair(i, f%COLORS, b%COLORS);
}
got_color = TRUE;
}
else
got_color = FALSE;
if (r)
refresh();
screen_w = COLS;
screen_h = LINES;
}
void refresh_screen()
{
if (winched == 2) {
disp_exit();
endwin();
curs_init(TRUE);
disp_init();
do {
} while (getch() != ERR);
winched = 1;
}
if (dirty) {
move(_y_pos, _x_pos);
refresh();
dirty = FALSE;
}
}
void sig_winch()
{
winched = 2;
}
void term_init(int screenheight)
{
int c, i;
char *p;
if (term_inited)
return;
curs_init(screenheight > 0);
if ((getenv("COLORTERM")) && (!orig_title[0])) {
printf("\e[?35l\e[?1000h\e[21t");
fflush(stdout);
i = 0;
for (;;) {
do {
c = getch();
} while (c == ERR);
orig_title[i] = c;
if ((i > 0) && (orig_title[i] == '\\') && (orig_title[i-1] == '\e'))
break;
i++;
}
orig_title[i-1] = 0;
p = strstr(orig_title, "\e]l");
if (p) {
p += 3;
memmove(orig_title, p, strlen(p)+1);
for (i=0; orig_title[i]; i++)
if (orig_title[i] < ' ')
orig_title[i] = ' ';
}
else
orig_title[0] = 0;
}
esc_waiting = 0;
esc_count = 0;
modifier_cache = 0;
signal(SIGWINCH, sig_winch);
term_inited = TRUE;
dirty = TRUE;
errno = 0;
}
void term_exit()
{
if (orig_title[0]) {
printf("\e[?35h\e[?1000l\e]0;%s\007", orig_title);
fflush(stdout);
}
goto2(0, screen_h-1);
cr_scroll();
cr_scroll();
clear_keybuf();
echo();
cbreak();
endwin();
signal(SIGWINCH, SIG_DFL);
term_inited = FALSE;
}
void term_suspend(int newline)
{
if (orig_title[0]) {
printf("\e[?35h\e[?1000l\e]0;%s\007", orig_title);
fflush(stdout);
}
goto2(0, screen_h-1);
if (newline)
cr_scroll();
clear_keybuf();
echo();
cbreak();
endwin();
term_inited = FALSE;
}
void term_reinit(int wait)
{
term_init(-1);
if (orig_title[0]) {
printf("\e[?35l\e[?1000h");
fflush(stdout);
}
if (wait) {
term_inited = FALSE;
clear_keybuf();
gch();
term_inited = TRUE;
}
refresh();
screen_w = COLS;
screen_h = LINES;
if (orig_title[0]) {
printf("%s", my_title);
fflush(stdout);
}
}
static int get_modifiers(int *err)
{
int arg = 6;
int mod = 0;
if (ioctl(fileno(stdin), TIOCLINUX, &arg) != -1) {
if (arg & 1)
mod |= KF_SHIFT;
if (arg & 4)
mod |= KF_CTRL;
if (arg & 10)
mod |= KF_ALT;
if (err)
*err = 0;
}
else {
if (err)
*err = 1;
}
errno = 0;
return mod;
}
typedef struct KEYINFO
{
char *string[4];
int code[4];
} KEYINFO;
static KEYINFO keyinfo[] =
{
/* norm shift ctrl c+s norm shift ctrl c+s */
{{ "\001", "\001", "\001", "\001" }, { 7681, 7681, 7681, 7681 }}, /* ctrl+A */
{{ "\002", "\002", "\002", "\002" }, { 12290, 12290, 12290, 12290 }}, /* ctrl+B */
{{ "\003", "\003", "\003", "\003" }, { 11779, 11779, 11779, 11779 }}, /* ctrl+C */
{{ "\004", "\004", "\004", "\004" }, { 8196, 8196, 8196, 8196 }}, /* ctrl+D */
{{ "\005", "\005", "\005", "\005" }, { 4613, 4613, 4613, 4613 }}, /* ctrl+E */
{{ "\006", "\006", "\006", "\006" }, { 8454, 8454, 8454, 8454 }}, /* ctrl+F */
{{ "\007", "\007", "\007", "\007" }, { 8711, 8711, 8711, 8711 }}, /* ctrl+G */
{{ "\013", "\013", "\013", "\013" }, { 9483, 9483, 9483, 9483 }}, /* ctrl+K */
{{ "\014", "\014", "\014", "\014" }, { 9740, 9740, 9740, 9740 }}, /* ctrl+L */
{{ "\016", "\016", "\016", "\016" }, { 12558, 12558, 12558, 12558 }}, /* ctrl+N */
{{ "\017", "\017", "\017", "\017" }, { 6159, 6159, 6159, 6159 }}, /* ctrl+O */
{{ "\020", "\020", "\020", "\020" }, { 12813, 12813, 12813, 12813 }}, /* ctrl+P */
{{ "\021", "\021", "\021", "\021" }, { 4113, 4113, 4113, 4113 }}, /* ctrl+Q */
{{ "\022", "\022", "\022", "\022" }, { 4882, 4882, 4882, 4882 }}, /* ctrl+R */
{{ "\023", "\023", "\023", "\023" }, { 7955, 7955, 7955, 7955 }}, /* ctrl+S */
{{ "\024", "\024", "\024", "\024" }, { 5140, 5140, 5140, 5140 }}, /* ctrl+T */
{{ "\025", "\025", "\025", "\025" }, { 5653, 5653, 5653, 5653 }}, /* ctrl+U */
{{ "\026", "\026", "\026", "\026" }, { 12054, 12054, 12054, 12054 }}, /* ctrl+V */
{{ "\027", "\027", "\027", "\027" }, { 4375, 4375, 4375, 4375 }}, /* ctrl+W */
{{ "\030", "\030", "\030", "\030" }, { 11544, 11544, 11544, 11544 }}, /* ctrl+X */
{{ "\031", "\031", "\031", "\031" }, { 5401 , 5401 , 5401 , 5401 }}, /* ctrl+Y */
{{ "\032", "\032", "\032", "\032" }, { 11290, 11290, 11290, 11290 }}, /* ctrl+Z */
{{ "\x7F", "\010", "\x1F", "\x1F" }, { 3592, 3592, 3711, 3711 }}, /* backspace */
{{ "\e\010", "\e\010", "\e\010", "\e\010" }, { 3711, 3711, 3711, 3711 }}, /* alt+backspace */
{{ "\x1C", "\x1C", "\x1C", "\x1C" }, { 3711, 3711, 3711, 3711 }}, /* ctrl+\ */
{{ "\011", "\e[Z", "\011", "\011" }, { 3849, 3849, 3849, 3849 }}, /* tab */
{{ "\e[A", "\e[a", "\eOa", "\eOA" }, { 18432, 18432, 18989, 18989 }}, /* up */
{{ "\e[B", "\e[b", "\eOb", "\eOB" }, { 20480, 20480, 20011, 20011 }}, /* down */
{{ "\e[C", "\e[c", "\eOc", "\eOC" }, { 19712, 19712, 29696, 29696 }}, /* right */
{{ "\e[D", "\e[d", "\eOd", "\eOD" }, { 19200, 19200, 29440, 29440 }}, /* left */
{{ "\eOx", "\eOx", "\eOx", "\eOx" }, { 18432, 18432, 18989, 18989 }}, /* pad up */
{{ "\eOw", "\eOw", "\eOw", "\eOw" }, { 20480, 20480, 20011, 20011 }}, /* pad down */
{{ "\eOv", "\eOv", "\eOv", "\eOv" }, { 19712, 19712, 29696, 29696 }}, /* pad right */
{{ "\eOt", "\eOt", "\eOt", "\eOt" }, { 19200, 19200, 29440, 29440 }}, /* pad left */
{{ "\e[3~", "\e[3$", "\e[3^", "\e[3@" }, { 21248, 21248, 21248, 21248 }}, /* delete */
{{ "\eOn", "\eOn", "\eOn", "\eOn" }, { 21248, 21248, 21248, 21248 }}, /* pad delete */
{{ "\e[2~", "\e[2$", "\e[2^", "\e[2@" }, { 20992, 20992, 5897, 5897 }}, /* insert */
{{ "\e[1~", "\e[1$", "\e[1^", "\e[1@" }, { 18176, 18176, 30464, 30464 }}, /* home */
{{ "\e[4~", "\e[4$", "\e[4^", "\e[4@" }, { 20224, 20224, 29952, 29952 }}, /* end */
{{ "\e[5~", "\e[5$", "\e[5^", "\e[5@" }, { 18688, 18688, 18688, 18688 }}, /* pgup */
{{ "\e[6~", "\e[6$", "\e[6^", "\e[6@" }, { 20736, 20736, 20736, 20736 }}, /* pgdn */
{{ "\n", "\eOM", "\e\n", "\e\n" }, { 7181, 7181, 7178, 7178 }}, /* enter */
{{ "\x1D", "\x1D", "\x1D", "\e]" }, { 6683, 6683, 6683, 6683 }}, /* ctrl+] */
{{ "\e[11~", "\e[23~", "\e[11^", "\e[23^" }, { 15104, 15104, 24064, 24064 }}, /* F1 */
{{ "\e[12~", "\e[24~", "\e[12^", "\e[24^" }, { 15360, 15360, 24320, 24320 }}, /* F2 */
{{ "\e[13~", "\e[25~", "\e[13^", "\e[25^" }, { 15616, 15616, 24576, 24576 }}, /* F3 */
{{ "\e[14~", "\e[26~", "\e[14^", "\e[26^" }, { 15872, 15872, 24832, 24832 }}, /* F4 */
{{ "\e[15~", "\e[28~", "\e[15^", "\e[28^" }, { 16128, 16128, 25088, 25088 }}, /* F5 */
{{ "\e[17~", "\e[29~", "\e[17^", "\e[29^" }, { 16384, 16384, 25344, 25344 }}, /* F6 */
{{ "\e[18~", "\e[31~", "\e[18^", "\e[31^" }, { 16640, 16640, 25600, 25600 }}, /* F7 */
{{ "\e[19~", "\e[32~", "\e[19^", "\e[32^" }, { 16896, 16896, 25856, 25856 }}, /* F8 */
{{ "\e[20~", "\e[33~", "\e[20^", "\e[33^" }, { 17152, 17152, 26112, 26112 }}, /* F9 */
{{ "\e[21~", "\e[34~", "\e[21^", "\e[34^" }, { 17408, 17408, 26368, 26368 }}, /* F10 */
{{ "\e[[A", "\e[[A", "\e[[A", "\e[[A" }, { 15104, 15104, 24064, 24064 }}, /* F1 type 2 */
{{ "\e[[B", "\e[[B", "\e[[B", "\e[[B" }, { 15360, 15360, 24320, 24320 }}, /* F2 type 2 */
{{ "\e[[C", "\e[[C", "\e[[C", "\e[[C" }, { 15616, 15616, 24576, 24576 }}, /* F3 type 2 */
{{ "\e[[D", "\e[[D", "\e[[D", "\e[[D" }, { 15872, 15872, 24832, 24832 }}, /* F4 type 2 */
{{ "\e[[E", "\e[[E", "\e[[E", "\e[[E" }, { 16128, 16128, 25088, 25088 }}, /* F5 type 2 */
};
int match_escape(int *c)
{
int i, j;
int err;
esc_buf[esc_count] = 0;
for (i=0; i<(int)(sizeof(keyinfo)/sizeof(KEYINFO)); i++) {
for (j=0; j<4; j++) {
if (strcmp(esc_buf, keyinfo[i].string[j]) == 0) {
*c = keyinfo[i].code[j];
switch (j) {
case 0:
/* normal */
modifier_cache = get_modifiers(&err);
if (!err) {
if ((modifier_cache & (KF_SHIFT | KF_CTRL)) == (KF_SHIFT | KF_CTRL)) {
*c = keyinfo[i].code[3];
modifier_cache = 0;
}
else if (modifier_cache & KF_CTRL) {
if ((*c == 18688) || (*c == 20736)) {
/* special bodge to turn ctrl+pgup into shift */
modifier_cache = KF_SHIFT;
}
else {
*c = keyinfo[i].code[2];
modifier_cache = 0;
}
}
else if (modifier_cache & KF_SHIFT) {
*c = keyinfo[i].code[1];
modifier_cache = 0;
}
}
break;
case 1:
/* shift */
modifier_cache = KF_SHIFT;
break;
case 2:
/* ctrl */
modifier_cache = KF_CTRL;
break;
case 3:
/* ctrl+shift */
modifier_cache = KF_SHIFT | KF_CTRL;
break;
}
return TRUE;
}
}
}
return FALSE;
}
int gch()
{
clock_t t;
int c;
if (esc_waiting) {
esc_waiting--;
return esc_playback[esc_waiting];
}
if (term_inited)
refresh_screen();
modifier_cache = 0;
esc_count = 0;
t = clock();
while ((clock() < t+CLOCKS_PER_SEC/10) || (esc_count <= 0)) {
c = getch();
if ((c) && (c != ERR)) {
if ((esc_count) && (c == '\e')) {
ungetch(c);
break;
}
esc_buf[esc_count++] = c;
if (match_escape(&c)) {
esc_waiting = 0;
return c;
}
if ((esc_count == 6) && (memcmp(esc_buf, "\e[M", 3) == 0)) {
_mouse_x = esc_buf[4] - ' ' - 1;
_mouse_y = esc_buf[5] - ' ' - 1;
switch (esc_buf[3] - ' ') {
case 0: _mouse_b = 1; break;
case 1: _mouse_b = 4; break;
case 2: _mouse_b = 2; break;
}
esc_waiting = 0;
return 0;
}
if (esc_count >= MAX_ESCAPE)
break;
if ((esc_count == 1) && (esc_buf[0] != '\e'))
break;
t = clock();
}
else if (!nosleep)
usleep(10);
}
esc_waiting = esc_count-1;
for (c=0; c<esc_waiting; c++)
esc_playback[c] = esc_buf[esc_waiting-c];
if (esc_buf[0] == '\e') {
if (!esc_waiting) {
modifier_cache = KF_ALT;
return 0;
}
else
return '^';
}
return esc_buf[0];
}
int keypressed()
{
int c;
if (esc_waiting)
return TRUE;
if (term_inited)
refresh_screen();
do {
c = getch();
} while (!c);
if (c == ERR) {
if (!nosleep)
usleep(10);
return FALSE;
}
ungetch(c);
return TRUE;
}
int modifiers()
{
if (modifier_cache)
return modifier_cache;
else
return get_modifiers(NULL);
}
void pch(unsigned char c)
{
int ch;
if ((x_pos >= 0) && (x_pos < screen_w)) {
if ((c < 0x20) || ((c >= 0x80) && (c <= 0xA0)))
ch = '^' | cattrib;
else
ch = c | cattrib;
mvaddch(y_pos, x_pos, ch);
dirty = TRUE;
}
x_pos++;
}
void mywrite(char *s)
{
while ((*s) && (x_pos < screen_w)) {
if (x_pos >= 0) {
if (*s < ' ')
mvaddch(y_pos, x_pos, '^' | cattrib);
else
mvaddch(y_pos, x_pos, *s | cattrib);
dirty = TRUE;
}
s++;
x_pos++;
}
while (*s) {
s++;
x_pos++;
}
}
void del_to_eol()
{
if (x_pos < screen_w) {
move(y_pos, MAX(x_pos, 0));
while (x_pos < screen_w) {
addch(' ' | cattrib);
x_pos++;
}
dirty = TRUE;
}
}
void cr_scroll()
{
if (y_pos < screen_h-1) {
y_pos++;
}
else {
move(0, 0);
deleteln();
}
x_pos = 0;
_x_pos = x_pos;
_y_pos = y_pos;
dirty = TRUE;
refresh_screen();
}
void cls()
{
clear();
goto1(0, 0);
dirty = TRUE;
}
void home()
{
x_pos = 0;
y_pos = 0;
}
void newline()
{
if (y_pos < screen_h-1)
y_pos++;
x_pos = 0;
}
void goto1(int x, int y)
{
x_pos = x;
y_pos = y;
}
void goto2(int x, int y)
{
x_pos = _x_pos = x;
y_pos = _y_pos = y;
dirty = TRUE;
}
void backspace()
{
if (x_pos > 0) {
x_pos--;
pch(' ');
x_pos--;
}
}
void linefeed()
{
if (y_pos < screen_h-1)
y_pos++;
}
void cr()
{
x_pos = 0;
}
void tattr(int col)
{
int f, b, c;
attrib = col;
cattrib = 0;
if (got_color) {
f = col&15;
b = col>>4;
c = (((f&7) + (b&7)*COLORS) % (COLOR_PAIRS-1)) + 1;
cattrib |= COLOR_PAIR(c);
if (f > 7)
cattrib |= A_BOLD;
if (b > 7)
cattrib |= A_BLINK;
}
else {
if ((col&0xF0) != (config.norm_col&0xF0))
cattrib |= A_REVERSE;
if ((col&0x0F) != (config.norm_col&0x0F))
cattrib |= A_BOLD;
}
}
void hide_c()
{
curs_set(0);
}
void show_c()
{
curs_set((config.big_cursor) ? 2 : 1);
}
void show_c2(int ovr)
{
curs_set(((ovr) ? !config.big_cursor : config.big_cursor) ? 2 : 1);
}
void print(int c)
{
}
int printer_ready()
{
return FALSE;
}
char *save_screen(int x, int y, int w, int h)
{
chtype *data;
int _x, _y;
w++;
h++;
data = malloc(sizeof(chtype)*w*h);
if (!data)
return NULL;
for (_y=0; _y<h; _y++) {
for (_x=0; _x<w; _x++) {
move(y+_y, x+_x);
data[_y*w+_x] = inch();
}
}
return (char *)data;
}
void restore_screen(int x, int y, int w, int h, char *buf)
{
chtype *data = (chtype *)buf;
int _x, _y;
w++;
h++;
if (buf) {
for (_y=0; _y<h; _y++) {
for (_x=0; _x<w; _x++) {
move(y+_y, x+_x);
addch(data[_y*w+_x]);
}
}
dirty = TRUE;
free(buf);
}
else
dirty_everything();
}
void clear_keybuf()
{
while (keypressed())
gch();
}
MYFILE *open_file(char *name, int mode)
{
FILE *f;
if (mode == FMODE_READ)
f = fopen(name, "rb");
else if (mode == FMODE_WRITE)
f = fopen(name, "wb");
else
f = NULL;
if (!f) {
if (!errno)
errno = ENMFILE;
}
else
errno = 0;
return f;
}
int close_file(MYFILE *f)
{
if (f) {
fclose(f);
return errno;
}
return 0;
}
int get_char(MYFILE *f)
{
int c = fgetc(f);
if (c == EOF)
errno = EOF;
return c;
}
int peek_char(MYFILE *f)
{
int c;
c = fgetc(f);
ungetc(c, f);
if (c == EOF)
errno = EOF;
return c;
}
void put_char(MYFILE *f, int c)
{
fputc(c, f);
}
int file_exists(char *p)
{
glob_t g;
char *s;
int i;
for (i=0; p[i]; i++) {
if ((p[i] == '*') || (p[i] == '?')) {
if (glob(p, GLOB_MARK | GLOB_NOESCAPE, NULL, &g) != 0)
return FALSE;
for (i=0; i<g.gl_pathc; i++) {
s = g.gl_pathv[i];
if ((s[0]) && (s[strlen(s)-1] != '/')) {
globfree(&g);
return TRUE;
}
}
globfree(&g);
return FALSE;
}
}
return (file_size(p) >= 0);
}
int file_size(char *p)
{
struct stat entry;
if (stat(p, &entry) != 0)
return -1;
if (!(entry.st_mode & S_IFREG))
return -1;
return entry.st_size;
}
long file_time(char *p)
{
struct stat entry;
if (stat(p, &entry) != 0)
return 0;
if (!(entry.st_mode & S_IFREG))
return 0;
return entry.st_mtime;
}
int search_path(char *result, char *prog, char *exts, char *var)
{
/* search for a file on the disk, searching PATH if needed */
char *p;
int pos;
strcpy(result,prog);
if (find_program(result,exts)) { /* look in current directory */