diff options
Diffstat (limited to 'bterm.h')
| -rw-r--r-- | bterm.h | 257 |
1 files changed, 3 insertions, 254 deletions
@@ -3,8 +3,8 @@ * Copyright 2019 Bruce Hill * Released under the MIT License * - * Definitions of some basic terminal stuff, like reading keys - * and some terminal escape sequences. + * Definitions of some basic terminal stuff, like reading keys and some + * terminal escape sequences. */ #ifndef FILE__BTERM_H @@ -12,6 +12,7 @@ #include <stdio.h> #include <time.h> +#include <unistd.h> // Maximum time in milliseconds between double clicks #define DOUBLECLICK_THRESHOLD 200 @@ -78,261 +79,9 @@ typedef enum { #define move_cursor(f, x, y) fprintf((f), "\033[%d;%dH", (int)(y)+1, (int)(x)+1) #define move_cursor_col(f, x) fprintf((f), "\033[%d`", (int)(x)+1) -typedef struct { - int key; - const char *name; -} keyname_t; - -static keyname_t key_names[] = { - {KEY_SPACE, "Space"}, {KEY_BACKSPACE2, "Backspace"}, - {KEY_F1, "F1"}, {KEY_F2, "F2"}, {KEY_F3, "F3"}, {KEY_F4, "F4"}, {KEY_F5, "F5"}, - {KEY_F6, "F6"}, {KEY_F7, "F7"}, {KEY_F8, "F8"}, {KEY_F9, "F9"}, {KEY_F10, "F10"}, - {KEY_F11, "F11"}, {KEY_F12, "F12"}, - {KEY_INSERT, "Insert"}, {KEY_DELETE, "Delete"}, - {KEY_HOME, "Home"}, {KEY_END, "End"}, - {KEY_PGUP, "PgUp"}, {KEY_PGUP, "Page Up"}, - {KEY_PGDN, "PgDn"}, {KEY_PGDN, "Page Down"}, - {KEY_ARROW_UP, "Up"}, {KEY_ARROW_DOWN, "Down"}, {KEY_ARROW_LEFT, "Left"}, {KEY_ARROW_RIGHT, "Right"}, - {MOUSE_LEFT_PRESS, "Left press"}, {MOUSE_RIGHT_PRESS, "Right press"}, {MOUSE_MIDDLE_PRESS, "Middle press"}, - {MOUSE_LEFT_DRAG, "Left drag"}, {MOUSE_RIGHT_DRAG, "Right drag"}, {MOUSE_MIDDLE_DRAG, "Middle drag"}, - {MOUSE_LEFT_RELEASE, "Left click"}, {MOUSE_RIGHT_RELEASE, "Right click"}, {MOUSE_MIDDLE_RELEASE, "Middle click"}, - {MOUSE_LEFT_RELEASE, "Left up"}, {MOUSE_RIGHT_RELEASE, "Right up"}, {MOUSE_MIDDLE_RELEASE, "Middle up"}, - {MOUSE_LEFT_RELEASE, "Left release"}, {MOUSE_RIGHT_RELEASE, "Right release"}, {MOUSE_MIDDLE_RELEASE, "Middle release"}, - {MOUSE_LEFT_DOUBLE, "Double left click"}, {MOUSE_RIGHT_DOUBLE, "Double right click"}, {MOUSE_MIDDLE_DOUBLE, "Double middle click"}, - {MOUSE_WHEEL_RELEASE, "Mouse wheel up"}, {MOUSE_WHEEL_PRESS, "Mouse wheel down"}, - {KEY_TAB, "Tab"}, {KEY_ENTER, "Enter"}, {KEY_ENTER, "Return"}, - {KEY_CTRL_A, "Ctrl-a"}, {KEY_CTRL_B, "Ctrl-b"}, {KEY_CTRL_C, "Ctrl-c"}, - {KEY_CTRL_D, "Ctrl-d"}, {KEY_CTRL_E, "Ctrl-e"}, {KEY_CTRL_F, "Ctrl-f"}, - {KEY_CTRL_G, "Ctrl-g"}, {KEY_CTRL_H, "Ctrl-h"}, {KEY_CTRL_I, "Ctrl-i"}, - {KEY_CTRL_J, "Ctrl-j"}, {KEY_CTRL_K, "Ctrl-k"}, {KEY_CTRL_L, "Ctrl-l"}, - {KEY_CTRL_M, "Ctrl-m"}, {KEY_CTRL_N, "Ctrl-n"}, {KEY_CTRL_O, "Ctrl-o"}, - {KEY_CTRL_P, "Ctrl-p"}, {KEY_CTRL_Q, "Ctrl-q"}, {KEY_CTRL_R, "Ctrl-r"}, - {KEY_CTRL_S, "Ctrl-s"}, {KEY_CTRL_T, "Ctrl-t"}, {KEY_CTRL_U, "Ctrl-u"}, - {KEY_CTRL_V, "Ctrl-v"}, {KEY_CTRL_W, "Ctrl-w"}, {KEY_CTRL_X, "Ctrl-x"}, - {KEY_CTRL_Y, "Ctrl-y"}, {KEY_CTRL_Z, "Ctrl-z"}, - {KEY_ESC, "Esc"}, {KEY_ESC, "Escape"}, - {KEY_CTRL_TILDE, "Ctrl-~"}, {KEY_CTRL_BACKSLASH, "Ctrl-\\"}, - {KEY_CTRL_LSQ_BRACKET, "Ctrl-]"}, {KEY_CTRL_RSQ_BRACKET, "Ctrl-]"}, - {KEY_CTRL_UNDERSCORE, "Ctrl-_"}, {KEY_CTRL_SLASH, "Ctrl-/"}, - {KEY_CTRL_AT, "Ctrl-@"}, {KEY_CTRL_CARET, "Ctrl-^"}, - {KEY_CTRL_BACKTICK, "Ctrl-`"}, - {KEY_CTRL_2, "Ctrl-2"}, {KEY_CTRL_3, "Ctrl-3"}, {KEY_CTRL_4, "Ctrl-4"}, - {KEY_CTRL_5, "Ctrl-5"}, {KEY_CTRL_6, "Ctrl-6"}, {KEY_CTRL_7, "Ctrl-7"}, - {KEY_CTRL_5, "Ctrl-8"}, {KEY_CTRL_6, "Ctrl-9"}, - {':', "Colon"}, {',', "Comma"}, -}; - int bgetkey(FILE *in, int *mouse_x, int *mouse_y); char *bkeyname(int key, char *buf); int bkeywithname(const char *name); -static inline int nextchar(int fd) -{ - char c; - return read(fd, &c, 1) == 1 ? c : -1; -} - -static inline int nextnum(int fd, int c, int *n) -{ - for (*n = 0; '0' <= c && c <= '9'; c = nextchar(fd)) - *n = 10*(*n) + (c - '0'); - return c; -} - -/* - * Get one key of input from the given file. Returns -1 on failure. - * If mouse_x or mouse_y are non-null and a mouse event occurs, they will be - * set to the position of the mouse (0-indexed). - */ -int bgetkey(FILE *in, int *mouse_x, int *mouse_y) -{ - if (mouse_x) *mouse_x = -1; - if (mouse_y) *mouse_y = -1; - int fd = fileno(in); - int numcode = 0, modifiers = 0; - int c = nextchar(fd); - if (c == '\x1b') - goto escape; - - return c; - - escape: - c = nextchar(fd); - // Actual escape key: - if (c < 0) - return KEY_ESC; - - switch (c) { - case '\x1b': return KEY_ESC; - case '[': c = nextchar(fd); goto CSI_start; - case 'P': goto DCS; - case 'O': goto SS3; - default: return MOD_ALT | c; - } - - CSI_start: - if (c == -1) - return MOD_ALT | '['; - - switch (c) { - case 'A': return modifiers | KEY_ARROW_UP; - case 'B': return modifiers | KEY_ARROW_DOWN; - case 'C': return modifiers | KEY_ARROW_RIGHT; - case 'D': return modifiers | KEY_ARROW_LEFT; - case 'F': return modifiers | KEY_END; - case 'H': return modifiers | KEY_HOME; - case 'J': return numcode == 2 ? (MOD_SHIFT | KEY_HOME) : -1; - case 'K': return MOD_SHIFT | KEY_END; - case 'M': return MOD_CTRL | KEY_DELETE; - case 'P': return modifiers | (numcode == 1 ? KEY_F1 : KEY_DELETE); - case 'Q': return numcode == 1 ? (modifiers | KEY_F2) : -1; - case 'R': return numcode == 1 ? (modifiers | KEY_F3) : -1; - case 'S': return numcode == 1 ? (modifiers | KEY_F4) : -1; - case '~': - switch (numcode) { - case 1: return modifiers | KEY_HOME; - case 2: return modifiers | KEY_INSERT; - case 3: return modifiers | KEY_DELETE; - case 4: return modifiers | KEY_END; - case 5: return modifiers | KEY_PGUP; - case 6: return modifiers | KEY_PGDN; - case 7: return modifiers | KEY_HOME; - case 8: return modifiers | KEY_END; - case 10: return modifiers | KEY_F0; - case 11: return modifiers | KEY_F1; - case 12: return modifiers | KEY_F2; - case 13: return modifiers | KEY_F3; - case 14: return modifiers | KEY_F4; - case 15: return modifiers | KEY_F5; - case 17: return modifiers | KEY_F6; - case 18: return modifiers | KEY_F7; - case 19: return modifiers | KEY_F8; - case 20: return modifiers | KEY_F9; - case 21: return modifiers | KEY_F10; - case 23: return modifiers | KEY_F11; - case 24: return modifiers | KEY_F12; - } - return -1; - case '<': { // Mouse clicks - int buttons = 0, x = 0, y = 0; - c = nextnum(fd, nextchar(fd), &buttons); - if (c != ';') return -1; - c = nextnum(fd, nextchar(fd), &x); - if (c != ';') return -1; - c = nextnum(fd, nextchar(fd), &y); - if (c != 'm' && c != 'M') return -1; - - if (mouse_x) *mouse_x = x - 1; - if (mouse_y) *mouse_y = y - 1; - - if (buttons & 4) modifiers |= MOD_SHIFT; - if (buttons & 8) modifiers |= MOD_META; - if (buttons & 16) modifiers |= MOD_CTRL; - int key = -1; - switch (buttons & ~(4|8|16)) { - case 0: key = c == 'm' ? MOUSE_LEFT_RELEASE : MOUSE_LEFT_PRESS; break; - case 1: key = c == 'm' ? MOUSE_MIDDLE_RELEASE : MOUSE_MIDDLE_PRESS; break; - case 2: key = c == 'm' ? MOUSE_RIGHT_RELEASE : MOUSE_RIGHT_PRESS; break; - case 32: key = MOUSE_LEFT_DRAG; break; - case 33: key = MOUSE_MIDDLE_DRAG; break; - case 34: key = MOUSE_RIGHT_DRAG; break; - case 64: key = MOUSE_WHEEL_RELEASE; break; - case 65: key = MOUSE_WHEEL_PRESS; break; - default: return -1; - } - if (key == MOUSE_LEFT_RELEASE || key == MOUSE_RIGHT_RELEASE || key == MOUSE_MIDDLE_RELEASE) { - static int lastclick = -1; - static struct timespec lastclicktime = {0, 0}; - struct timespec clicktime; - clock_gettime(CLOCK_MONOTONIC, &clicktime); - if (key == lastclick) { - double dt_ms = 1e3*(double)(clicktime.tv_sec - lastclicktime.tv_sec) - + 1e-6*(double)(clicktime.tv_nsec - lastclicktime.tv_nsec); - if (dt_ms < DOUBLECLICK_THRESHOLD) { - switch (key) { - case MOUSE_LEFT_RELEASE: key = MOUSE_LEFT_DOUBLE; break; - case MOUSE_RIGHT_RELEASE: key = MOUSE_RIGHT_DOUBLE; break; - case MOUSE_MIDDLE_RELEASE: key = MOUSE_MIDDLE_DOUBLE; break; - } - } - } - lastclicktime = clicktime; - lastclick = key; - } - return modifiers | key; - } - default: - if ('0' <= c && c <= '9') { - // Ps prefix - c = nextnum(fd, c, &numcode); - if (c == ';') { - c = nextnum(fd, nextchar(fd), &modifiers); - modifiers = (modifiers >> 1) << MOD_BITSHIFT; - } - goto CSI_start; - } - } - return -1; - - DCS: - return -1; - - SS3: - switch (nextchar(fd)) { - case 'P': return KEY_F1; - case 'Q': return KEY_F2; - case 'R': return KEY_F3; - case 'S': return KEY_F4; - default: break; - } - return -1; -} - -/* - * Populate `buf` with the name of a key. - */ -char *bkeyname(int key, char *buf) -{ - if (key & MOD_META) buf = stpcpy(buf, "Super-"); - if (key & MOD_CTRL) buf = stpcpy(buf, "Ctrl-"); - if (key & MOD_ALT) buf = stpcpy(buf, "Alt-"); - if (key & MOD_SHIFT) buf = stpcpy(buf, "Shift-"); - key &= ~(MOD_META | MOD_CTRL | MOD_ALT | MOD_SHIFT); - for (size_t i = 0; i < sizeof(key_names)/sizeof(key_names[0]); i++) { - if (key_names[i].key == key) { - return stpcpy(buf, key_names[i].name); - } - } - if (' ' < key && key <= '~') - return buf + sprintf(buf, "%c", key); - else - return buf + sprintf(buf, "\\x%02X", key); -} - -/* - * Return the key with the given name, if one exists, otherwise -1. - * (i.e. bkeywithname("Space") == ' ', bkeywithname("x") == 'x', bkeywithname("F1") == KEY_F1, bkeywithname("???") == -1) - */ -int bkeywithname(const char *name) -{ - int modifiers = 0; - static const struct { const char *prefix; int modifier; } modnames[] = { - {"Super-", MOD_META}, {"Ctrl-", MOD_CTRL}, {"Alt-", MOD_ALT}, {"Shift-", MOD_SHIFT} - }; - check_names: - for (size_t i = 0; i < sizeof(key_names)/sizeof(key_names[0]); i++) { - if (strcmp(key_names[i].name, name) == 0) - return modifiers | key_names[i].key; - } - for (size_t i = 0; i < sizeof(modnames)/sizeof(modnames[0]); i++) { - if (strncmp(name, modnames[i].prefix, strlen(modnames[i].prefix)) == 0) { - modifiers |= modnames[i].modifier; - name += strlen(modnames[i].prefix); - goto check_names; - } - } - return strlen(name) == 1 ? name[0] : -1; -} - #endif // vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1 |