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/*
* Definitions of some key character constants
*/
#ifndef _KEYS_DEFINED
#define _KEYS_DEFINED
#include <poll.h>
#define KEY_F1 (0xFFFF-0)
#define KEY_F2 (0xFFFF-1)
#define KEY_F3 (0xFFFF-2)
#define KEY_F4 (0xFFFF-3)
#define KEY_F5 (0xFFFF-4)
#define KEY_F6 (0xFFFF-5)
#define KEY_F7 (0xFFFF-6)
#define KEY_F8 (0xFFFF-7)
#define KEY_F9 (0xFFFF-8)
#define KEY_F10 (0xFFFF-9)
#define KEY_F11 (0xFFFF-10)
#define KEY_F12 (0xFFFF-11)
#define KEY_INSERT (0xFFFF-12)
#define KEY_DELETE (0xFFFF-13)
#define KEY_HOME (0xFFFF-14)
#define KEY_END (0xFFFF-15)
#define KEY_PGUP (0xFFFF-16)
#define KEY_PGDN (0xFFFF-17)
#define KEY_ARROW_UP (0xFFFF-18)
#define KEY_ARROW_DOWN (0xFFFF-19)
#define KEY_ARROW_LEFT (0xFFFF-20)
#define KEY_ARROW_RIGHT (0xFFFF-21)
#define KEY_MOUSE_LEFT (0xFFFF-22)
#define KEY_MOUSE_RIGHT (0xFFFF-23)
#define KEY_MOUSE_MIDDLE (0xFFFF-24)
#define KEY_MOUSE_RELEASE (0xFFFF-25)
#define KEY_MOUSE_WHEEL_UP (0xFFFF-26)
#define KEY_MOUSE_WHEEL_DOWN (0xFFFF-27)
/* These are all ASCII code points below SPACE character and a BACKSPACE key. */
#define KEY_CTRL_TILDE 0x00
#define KEY_CTRL_2 0x00 /* clash with 'CTRL_TILDE' */
#define KEY_CTRL_A 0x01
#define KEY_CTRL_B 0x02
#define KEY_CTRL_C 0x03
#define KEY_CTRL_D 0x04
#define KEY_CTRL_E 0x05
#define KEY_CTRL_F 0x06
#define KEY_CTRL_G 0x07
#define KEY_BACKSPACE 0x08
#define KEY_CTRL_H 0x08 /* clash with 'CTRL_BACKSPACE' */
#define KEY_TAB 0x09
#define KEY_CTRL_I 0x09 /* clash with 'TAB' */
#define KEY_CTRL_J 0x0A
#define KEY_CTRL_K 0x0B
#define KEY_CTRL_L 0x0C
#define KEY_ENTER 0x0D
#define KEY_CTRL_M 0x0D /* clash with 'ENTER' */
#define KEY_CTRL_N 0x0E
#define KEY_CTRL_O 0x0F
#define KEY_CTRL_P 0x10
#define KEY_CTRL_Q 0x11
#define KEY_CTRL_R 0x12
#define KEY_CTRL_S 0x13
#define KEY_CTRL_T 0x14
#define KEY_CTRL_U 0x15
#define KEY_CTRL_V 0x16
#define KEY_CTRL_W 0x17
#define KEY_CTRL_X 0x18
#define KEY_CTRL_Y 0x19
#define KEY_CTRL_Z 0x1A
#define KEY_ESC 0x1B
#define KEY_CTRL_LSQ_BRACKET 0x1B /* clash with 'ESC' */
#define KEY_CTRL_3 0x1B /* clash with 'ESC' */
#define KEY_CTRL_4 0x1C
#define KEY_CTRL_BACKSLASH 0x1C /* clash with 'CTRL_4' */
#define KEY_CTRL_5 0x1D
#define KEY_CTRL_RSQ_BRACKET 0x1D /* clash with 'CTRL_5' */
#define KEY_CTRL_6 0x1E
#define KEY_CTRL_7 0x1F
#define KEY_CTRL_SLASH 0x1F /* clash with 'CTRL_7' */
#define KEY_CTRL_UNDERSCORE 0x1F /* clash with 'CTRL_7' */
#define KEY_SPACE 0x20
#define KEY_BACKSPACE2 0x7F
#define KEY_CTRL_8 0x7F /* clash with 'BACKSPACE2' */
#define ESC_DELAY 10
static inline int nextchar(int fd, int timeout)
{
char c;
struct pollfd pfd = {fd, POLLIN, 0};
if (poll(&pfd, 1, timeout) > 0)
return read(fd, &c, 1) == 1 ? c : -1;
return -1;
}
int term_getkey(int fd, int *mouse_x, int *mouse_y, int timeout)
{
int c = nextchar(fd, timeout);
if (c == '\x1b')
goto escape;
return c;
escape:
c = nextchar(fd, ESC_DELAY);
// Actual escape key:
if (c == -1)
return KEY_ESC;
switch (c) {
case '[': goto CSI;
case 'P': goto DCS;
case 'O': goto SS3;
default: return -1;
}
CSI:
c = nextchar(fd, ESC_DELAY);
if (c == -1)
return -1;
switch (c) {
case 'A': return KEY_ARROW_UP;
case 'B': return KEY_ARROW_DOWN;
case 'C': return KEY_ARROW_RIGHT;
case 'D': return KEY_ARROW_LEFT;
case 'F': return KEY_END;
case 'H': return KEY_HOME;
case '1':
switch (nextchar(fd, ESC_DELAY)) {
case '5':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F5 : -1;
case '7':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F6 : -1;
case '8':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F7 : -1;
case '9':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F8 : -1;
default: return -1;
}
break;
case '2':
switch (nextchar(fd, ESC_DELAY)) {
case '0':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F9 : -1;
case '1':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F10 : -1;
case '3':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F11 : -1;
case '4':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_F12 : -1;
default: return -1;
}
break;
case '3':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_DELETE : -1;
case '5':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_PGUP : -1;
case '6':
return nextchar(fd, ESC_DELAY) == '~' ? KEY_PGDN : -1;
case '<': { // Mouse clicks
int buttons = 0, x = 0, y = 0;
char buf;
while (read(fd, &buf, 1) == 1 && '0' <= buf && buf <= '9')
buttons = buttons * 10 + (buf - '0');
if (buf != ';') return -1;
while (read(fd, &buf, 1) == 1 && '0' <= buf && buf <= '9')
x = x * 10 + (buf - '0');
if (buf != ';') return -1;
while (read(fd, &buf, 1) == 1 && '0' <= buf && buf <= '9')
y = y * 10 + (buf - '0');
if (buf != 'm' && buf != 'M') return -1;
*mouse_x = x - 1, *mouse_y = y - 1;
if (buf == 'm')
return KEY_MOUSE_RELEASE;
switch (buttons) {
case 64: return KEY_MOUSE_WHEEL_UP;
case 65: return KEY_MOUSE_WHEEL_DOWN;
case 0: return KEY_MOUSE_LEFT;
case 1: return KEY_MOUSE_RIGHT;
case 2: return KEY_MOUSE_MIDDLE;
default: return -1;
}
break;
}
}
return -1;
DCS:
return -1;
SS3:
switch (nextchar(fd, ESC_DELAY)) {
case 'P': return KEY_F1;
case 'Q': return KEY_F2;
case 'R': return KEY_F3;
case 'S': return KEY_F4;
default: break;
}
return -1;
}
#endif
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