diff options
Diffstat (limited to 'termkey.c')
| -rw-r--r-- | termkey.c | 1556 |
1 files changed, 0 insertions, 1556 deletions
diff --git a/termkey.c b/termkey.c deleted file mode 100644 index ad80657..0000000 --- a/termkey.c +++ /dev/null @@ -1,1556 +0,0 @@ -#include "termkey.h" -#include "termkey-internal.h" - -#include <ctype.h> -#include <errno.h> -#include <poll.h> -#include <unistd.h> -#include <string.h> -#include <strings.h> -#include <langinfo.h> - -#include <stdio.h> - -void -termkey_check_version (int major, int minor) -{ - if (major != TERMKEY_VERSION_MAJOR) - fprintf (stderr, "libtermkey major version mismatch;" - " %d (wants) != %d (library)\n", - major, TERMKEY_VERSION_MAJOR); - else if (minor > TERMKEY_VERSION_MINOR) - fprintf (stderr, "libtermkey minor version mismatch;" - " %d (wants) > %d (library)\n", - minor, TERMKEY_VERSION_MINOR); - else - return; - exit (1); -} - -static termkey_driver_t *drivers[] = -{ - &termkey_driver_ti, - &termkey_driver_csi, - NULL, -}; - -// Forwards for the "protected" methods -static void emit_codepoint (termkey_t *tk, uint32_t codepoint, termkey_key_t *key); -static termkey_result_t peekkey_simple (termkey_t *tk, - termkey_key_t *key, int force, size_t *nbytes); -static termkey_result_t peekkey_mouse (termkey_t *tk, - termkey_key_t *key, size_t *nbytes); - -static termkey_sym_t register_c0 (termkey_t *tk, termkey_sym_t sym, - unsigned char ctrl, const char *name); -static termkey_sym_t register_c0_full (termkey_t *tk, termkey_sym_t sym, - int modifier_set, int modifier_mask, unsigned char ctrl, const char *name); - -static struct -{ - termkey_sym_t sym; - const char *name; -} -keynames[] = -{ - { TERMKEY_SYM_NONE, "NONE" }, - { TERMKEY_SYM_BACKSPACE, "Backspace" }, - { TERMKEY_SYM_TAB, "Tab" }, - { TERMKEY_SYM_ENTER, "Enter" }, - { TERMKEY_SYM_ESCAPE, "Escape" }, - { TERMKEY_SYM_SPACE, "Space" }, - { TERMKEY_SYM_DEL, "DEL" }, - { TERMKEY_SYM_UP, "Up" }, - { TERMKEY_SYM_DOWN, "Down" }, - { TERMKEY_SYM_LEFT, "Left" }, - { TERMKEY_SYM_RIGHT, "Right" }, - { TERMKEY_SYM_BEGIN, "Begin" }, - { TERMKEY_SYM_FIND, "Find" }, - { TERMKEY_SYM_INSERT, "Insert" }, - { TERMKEY_SYM_DELETE, "Delete" }, - { TERMKEY_SYM_SELECT, "Select" }, - { TERMKEY_SYM_PAGEUP, "PageUp" }, - { TERMKEY_SYM_PAGEDOWN, "PageDown" }, - { TERMKEY_SYM_HOME, "Home" }, - { TERMKEY_SYM_END, "End" }, - { TERMKEY_SYM_CANCEL, "Cancel" }, - { TERMKEY_SYM_CLEAR, "Clear" }, - { TERMKEY_SYM_CLOSE, "Close" }, - { TERMKEY_SYM_COMMAND, "Command" }, - { TERMKEY_SYM_COPY, "Copy" }, - { TERMKEY_SYM_EXIT, "Exit" }, - { TERMKEY_SYM_HELP, "Help" }, - { TERMKEY_SYM_MARK, "Mark" }, - { TERMKEY_SYM_MESSAGE, "Message" }, - { TERMKEY_SYM_MOVE, "Move" }, - { TERMKEY_SYM_OPEN, "Open" }, - { TERMKEY_SYM_OPTIONS, "Options" }, - { TERMKEY_SYM_PRINT, "Print" }, - { TERMKEY_SYM_REDO, "Redo" }, - { TERMKEY_SYM_REFERENCE, "Reference" }, - { TERMKEY_SYM_REFRESH, "Refresh" }, - { TERMKEY_SYM_REPLACE, "Replace" }, - { TERMKEY_SYM_RESTART, "Restart" }, - { TERMKEY_SYM_RESUME, "Resume" }, - { TERMKEY_SYM_SAVE, "Save" }, - { TERMKEY_SYM_SUSPEND, "Suspend" }, - { TERMKEY_SYM_UNDO, "Undo" }, - { TERMKEY_SYM_KP0, "KP0" }, - { TERMKEY_SYM_KP1, "KP1" }, - { TERMKEY_SYM_KP2, "KP2" }, - { TERMKEY_SYM_KP3, "KP3" }, - { TERMKEY_SYM_KP4, "KP4" }, - { TERMKEY_SYM_KP5, "KP5" }, - { TERMKEY_SYM_KP6, "KP6" }, - { TERMKEY_SYM_KP7, "KP7" }, - { TERMKEY_SYM_KP8, "KP8" }, - { TERMKEY_SYM_KP9, "KP9" }, - { TERMKEY_SYM_KPENTER, "KPEnter" }, - { TERMKEY_SYM_KPPLUS, "KPPlus" }, - { TERMKEY_SYM_KPMINUS, "KPMinus" }, - { TERMKEY_SYM_KPMULT, "KPMult" }, - { TERMKEY_SYM_KPDIV, "KPDiv" }, - { TERMKEY_SYM_KPCOMMA, "KPComma" }, - { TERMKEY_SYM_KPPERIOD, "KPPeriod" }, - { TERMKEY_SYM_KPEQUALS, "KPEquals" }, - { 0, NULL }, -}; - -#define CHARAT(i) (tk->buffer[tk->buffstart + (i)]) - -#ifdef DEBUG -/* Some internal deubgging functions */ - -static void -print_buffer (termkey_t *tk) -{ - size_t i; - for (i = 0; i < tk->buffcount && i < 20; i++) - fprintf (stderr, "%02x ", CHARAT (i)); - if (tk->buffcount > 20) - fprintf (stderr, "..."); -} - -static void -print_key (termkey_t *tk, termkey_key_t *key) -{ - switch (key->type) - { - case TERMKEY_TYPE_KEY: - fprintf (stderr, "Unicode codepoint=U+%04lx multibyte='%s'", - (long) key->code.codepoint, key->multibyte); - break; - case TERMKEY_TYPE_FUNCTION: - fprintf (stderr, "Function F%d", key->code.number); - break; - case TERMKEY_TYPE_KEYSYM: - fprintf (stderr, "Keysym sym=%d(%s)", - key->code.sym, termkey_get_keyname (tk, key->code.sym)); - break; - case TERMKEY_TYPE_MOUSE: - { - termkey_mouse_event_t ev; - int button, line, col; - termkey_interpret_mouse (tk, key, &ev, &button, &line, &col); - fprintf (stderr, "Mouse ev=%d button=%d pos=(%d,%d)\n", - ev, button, line, col); - break; - } - case TERMKEY_TYPE_POSITION: - { - int line, col; - termkey_interpret_position (tk, key, &line, &col); - fprintf (stderr, "Position report pos=(%d,%d)\n", line, col); - break; - } - case TERMKEY_TYPE_MODEREPORT: - { - int initial, mode, value; - termkey_interpret_modereport (tk, key, &initial, &mode, &value); - fprintf (stderr, "Mode report mode=%s %d val=%d\n", - initial == '?' ? "DEC" : "ANSI", mode, value); - break; - } - case TERMKEY_TYPE_UNKNOWN_CSI: - fprintf (stderr, "unknown CSI\n"); - } - - int m = key->modifiers; - fprintf (stderr, " mod=%s%s%s+%02x", - (m & TERMKEY_KEYMOD_CTRL ? "C" : ""), - (m & TERMKEY_KEYMOD_ALT ? "A" : ""), - (m & TERMKEY_KEYMOD_SHIFT ? "S" : ""), - m & ~(TERMKEY_KEYMOD_CTRL | TERMKEY_KEYMOD_ALT | TERMKEY_KEYMOD_SHIFT)); -} - -static const char * -res2str (termkey_result_t res) -{ - static char errorbuffer[256]; - - switch (res) - { - case TERMKEY_RES_KEY: - return "TERMKEY_RES_KEY"; - case TERMKEY_RES_EOF: - return "TERMKEY_RES_EOF"; - case TERMKEY_RES_AGAIN: - return "TERMKEY_RES_AGAIN"; - case TERMKEY_RES_NONE: - return "TERMKEY_RES_NONE"; - case TERMKEY_RES_ERROR: - snprintf (errorbuffer, sizeof errorbuffer, - "TERMKEY_RES_ERROR(errno=%d)\n", errno); - return (const char*) errorbuffer; - } - - return "unknown"; -} -#endif - -/* Similar to snprintf(str, size, "%s", src) except it turns CamelCase into - * space separated values - */ -static int -snprint_cameltospaces (char *str, size_t size, const char *src) -{ - int prev_lower = 0; - size_t l = 0; - while (*src && l < size - 1) - { - if (isupper (*src) && prev_lower) - { - if (str) - str[l++] = ' '; - if (l >= size - 1) - break; - } - prev_lower = islower (*src); - str[l++] = tolower (*src++); - } - str[l] = 0; - - /* For consistency with snprintf, return the number of bytes that would have - * been written, excluding '\0' */ - for (; *src; src++) - { - if (isupper (*src) && prev_lower) - l++; - prev_lower = islower (*src); - l++; - } - return l; -} - -/* Similar to strcmp(str, strcamel, n) except that: - * it compares CamelCase in strcamel with space separated values in str; - * it takes char**s and updates them - * n counts bytes of strcamel, not str - */ -static int -strpncmp_camel (const char **strp, const char **strcamelp, size_t n) -{ - const char *str = *strp, *strcamel = *strcamelp; - int prev_lower = 0; - - for (; (*str || *strcamel) && n; n--) - { - char b = tolower (*strcamel); - if (isupper (*strcamel) && prev_lower) - { - if (*str != ' ') - break; - str++; - if (*str != b) - break; - } - else if (*str != b) - break; - - prev_lower = islower (*strcamel); - - str++; - strcamel++; - } - - *strp = str; - *strcamelp = strcamel; - return *str - *strcamel; -} - -static termkey_t * -termkey_alloc (void) -{ - termkey_t *tk = malloc (sizeof *tk); - if (!tk) - return NULL; - - /* Default all the object fields but don't allocate anything */ - - tk->fd = -1; - tk->flags = 0; - tk->canonflags = 0; - - tk->buffer = NULL; - tk->buffstart = 0; - tk->buffcount = 0; - tk->buffsize = 256; /* bytes */ - tk->hightide = 0; - - tk->restore_termios_valid = false; - - tk->waittime = 50; /* msec */ - - tk->is_closed = false; - tk->is_started = false; - - tk->nkeynames = 64; - tk->keynames = NULL; - - for (int i = 0; i < 32; i++) - tk->c0[i].sym = TERMKEY_SYM_NONE; - - tk->drivers = NULL; - - tk->method.emit_codepoint = &emit_codepoint; - tk->method.peekkey_simple = &peekkey_simple; - tk->method.peekkey_mouse = &peekkey_mouse; - return tk; -} - -static int -termkey_init (termkey_t *tk, const char *term, const char *encoding) -{ - if (!encoding) - encoding = nl_langinfo (CODESET); - - static const uint16_t endianity = 0x0102; - const char *utf32 = (*(uint8_t *) &endianity == 0x01) - ? "UTF-32BE" : "UTF-32LE"; - - if ((tk->to_utf32_conv = iconv_open (utf32, encoding)) == (iconv_t) -1) - return 0; - if ((tk->from_utf32_conv = iconv_open (encoding, utf32)) == (iconv_t) -1) - goto abort_free_to_utf32; - - tk->buffer = malloc (tk->buffsize); - if (!tk->buffer) - goto abort_free_from_utf32; - - tk->keynames = malloc (sizeof tk->keynames[0] * tk->nkeynames); - if (!tk->keynames) - goto abort_free_buffer; - - int i; - for (i = 0; i < tk->nkeynames; i++) - tk->keynames[i] = NULL; - for (i = 0; keynames[i].name; i++) - if (termkey_register_keyname (tk, - keynames[i].sym, keynames[i].name) == -1) - goto abort_free_keynames; - - register_c0 (tk, TERMKEY_SYM_BACKSPACE, 0x08, NULL); - register_c0 (tk, TERMKEY_SYM_TAB, 0x09, NULL); - register_c0 (tk, TERMKEY_SYM_ENTER, 0x0d, NULL); - register_c0 (tk, TERMKEY_SYM_ESCAPE, 0x1b, NULL); - - termkey_driver_node_t **tail = &tk->drivers; - for (i = 0; drivers[i]; i++) - { - void *info = (*drivers[i]->new_driver) (tk, term); - if (!info) - continue; - -#ifdef DEBUG - fprintf (stderr, "Loading the %s driver...\n", drivers[i]->name); -#endif - - termkey_driver_node_t *thisdrv = malloc (sizeof *thisdrv); - if (!thisdrv) - goto abort_free_drivers; - - thisdrv->driver = drivers[i]; - thisdrv->info = info; - thisdrv->next = NULL; - - *tail = thisdrv; - tail = &thisdrv->next; - -#ifdef DEBUG - fprintf (stderr, "Loaded %s driver\n", drivers[i]->name); -#endif - } - - if (!tk->drivers) - { - errno = ENOENT; - goto abort_free_keynames; - } - return 1; - -abort_free_drivers: - for (termkey_driver_node_t *p = tk->drivers; p; ) - { - (*p->driver->free_driver) (p->info); - termkey_driver_node_t *next = p->next; - free (p); - p = next; - } - -abort_free_keynames: - free (tk->keynames); -abort_free_buffer: - free (tk->buffer); -abort_free_from_utf32: - iconv_close (tk->from_utf32_conv); -abort_free_to_utf32: - iconv_close (tk->to_utf32_conv); - return 0; -} - -termkey_t * -termkey_new (int fd, const char *encoding, int flags) -{ - termkey_t *tk = termkey_alloc (); - if (!tk) - return NULL; - - tk->fd = fd; - termkey_set_flags (tk, flags); - - const char *term = getenv ("TERM"); - if (termkey_init (tk, term, encoding) - && termkey_start (tk)) - return tk; - - free (tk); - return NULL; -} - -termkey_t * -termkey_new_abstract (const char *term, const char *encoding, int flags) -{ - termkey_t *tk = termkey_alloc (); - if (!tk) - return NULL; - - tk->fd = -1; - termkey_set_flags (tk, flags); - - if (!termkey_init (tk, term, encoding)) - { - free (tk); - return NULL; - } - - termkey_start (tk); - return tk; -} - -void -termkey_free (termkey_t *tk) -{ - free (tk->buffer); tk->buffer = NULL; - free (tk->keynames); tk->keynames = NULL; - - iconv_close (tk->to_utf32_conv); - tk->to_utf32_conv = (iconv_t) -1; - iconv_close (tk->from_utf32_conv); - tk->from_utf32_conv = (iconv_t) -1; - - termkey_driver_node_t *p, *next; - for (p = tk->drivers; p; p = next) - { - (*p->driver->free_driver) (p->info); - next = p->next; - free (p); - } - free (tk); -} - -void -termkey_destroy (termkey_t *tk) -{ - if (tk->is_started) - termkey_stop (tk); - - termkey_free (tk); -} - -int -termkey_start (termkey_t *tk) -{ - if (tk->is_started) - return 1; - - if (tk->fd != -1 && !(tk->flags & TERMKEY_FLAG_NOTERMIOS)) - { - struct termios termios; - if (tcgetattr (tk->fd, &termios) == 0) - { - tk->restore_termios = termios; - tk->restore_termios_valid = true; - - termios.c_iflag &= ~(IXON|INLCR|ICRNL); - termios.c_lflag &= ~(ICANON|ECHO); - termios.c_cc[VMIN] = 1; - termios.c_cc[VTIME] = 0; - - if (tk->flags & TERMKEY_FLAG_CTRLC) - /* want no signal keys at all, so just disable ISIG */ - termios.c_lflag &= ~ISIG; - else - { - /* Disable ^\ == VQUIT and ^D == VSUSP but leave ^C as SIGINT */ - termios.c_cc[VQUIT] = _POSIX_VDISABLE; - termios.c_cc[VSUSP] = _POSIX_VDISABLE; - /* Some OSes have ^Y == VDSUSP */ -#ifdef VDSUSP - termios.c_cc[VDSUSP] = _POSIX_VDISABLE; -#endif - } - -#ifdef DEBUG - fprintf (stderr, "Setting termios(3) flags\n"); -#endif - tcsetattr (tk->fd, TCSANOW, &termios); - } - } - - termkey_driver_node_t *p; - for (p = tk->drivers; p; p = p->next) - if (p->driver->start_driver) - if (!(*p->driver->start_driver) (tk, p->info)) - return 0; - -#ifdef DEBUG - fprintf (stderr, "Drivers started; termkey instance %p is ready\n", tk); -#endif - - tk->is_started = 1; - return 1; -} - -int -termkey_stop (termkey_t *tk) -{ - if (!tk->is_started) - return 1; - - struct termkey_driver_node *p; - for (p = tk->drivers; p; p = p->next) - if (p->driver->stop_driver) - (*p->driver->stop_driver) (tk, p->info); - - if (tk->restore_termios_valid) - tcsetattr (tk->fd, TCSANOW, &tk->restore_termios); - - tk->is_started = false; - return 1; -} - -int -termkey_is_started (termkey_t *tk) -{ - return tk->is_started; -} - -int -termkey_get_fd (termkey_t *tk) -{ - return tk->fd; -} - -int -termkey_get_flags (termkey_t *tk) -{ - return tk->flags; -} - -void -termkey_set_flags (termkey_t *tk, int newflags) -{ - tk->flags = newflags; - if (tk->flags & TERMKEY_FLAG_SPACESYMBOL) - tk->canonflags |= TERMKEY_CANON_SPACESYMBOL; - else - tk->canonflags &= ~TERMKEY_CANON_SPACESYMBOL; -} - -void -termkey_set_waittime (termkey_t *tk, int msec) -{ - tk->waittime = msec; -} - -int -termkey_get_waittime (termkey_t *tk) -{ - return tk->waittime; -} - -int -termkey_get_canonflags (termkey_t *tk) -{ - return tk->canonflags; -} - -void -termkey_set_canonflags (termkey_t *tk, int flags) -{ - tk->canonflags = flags; - if (tk->canonflags & TERMKEY_CANON_SPACESYMBOL) - tk->flags |= TERMKEY_FLAG_SPACESYMBOL; - else - tk->flags &= ~TERMKEY_FLAG_SPACESYMBOL; -} - -size_t -termkey_get_buffer_size (termkey_t *tk) -{ - return tk->buffsize; -} - -int -termkey_set_buffer_size (termkey_t *tk, size_t size) -{ - unsigned char *buffer = realloc (tk->buffer, size); - if (!buffer) - return 0; - - tk->buffer = buffer; - tk->buffsize = size; - return 1; -} - -size_t -termkey_get_buffer_remaining (termkey_t *tk) -{ - /* Return the total number of free bytes in the buffer, - * because that's what is available to the user. */ - return tk->buffsize - tk->buffcount; -} - -static void -eat_bytes (termkey_t *tk, size_t count) -{ - if (count >= tk->buffcount) - { - tk->buffstart = 0; - tk->buffcount = 0; - return; - } - - tk->buffstart += count; - tk->buffcount -= count; -} - -#define MULTIBYTE_INVALID '?' - -static void -fill_multibyte (termkey_t *tk, termkey_key_t *key) -{ - size_t codepoint_len = sizeof key->code.codepoint; - char *codepoint_ptr = (char *) &key->code.codepoint; - size_t multibyte_len = sizeof key->multibyte; - char *multibyte_ptr = (char *) key->multibyte; - - size_t result = iconv (tk->from_utf32_conv, - &codepoint_ptr, &codepoint_len, &multibyte_ptr, &multibyte_len); - size_t output = sizeof key->multibyte - multibyte_len; - - // Something broke - if (result == (size_t) -1 || output == 0) - { - key->multibyte[0] = MULTIBYTE_INVALID; - key->multibyte[1] = 0; - return; - } - - // Append a null character, as it wasn't port of the input - key->multibyte[output] = 0; -} - -static termkey_result_t -parse_multibyte (termkey_t *tk, const unsigned char *bytes, size_t len, - uint32_t *cp, size_t *nbytep) -{ - size_t multibyte_len = len; - char *multibyte_ptr = (char *) bytes; - size_t codepoint_len = sizeof *cp; - char *codepoint_ptr = (char *) cp; - - // Fingers crossed... - errno = 0; - iconv (tk->to_utf32_conv, - &multibyte_ptr, &multibyte_len, &codepoint_ptr, &codepoint_len); - - // Only one Unicode character could have been processed at maximum, - // so let's just set the number of processed bytes to the difference - *nbytep = len - multibyte_len; - - // Nothing has been converted, let's examine what happened - if (codepoint_ptr == (char *) cp) - { - if (errno == 0) - // The input was probably a shift sequence - return TERMKEY_RES_AGAIN; - if (errno == EINVAL) - // Incomplete character or shift sequence - return TERMKEY_RES_AGAIN; - if (errno == EILSEQ) - { - // Invalid multibyte sequence in the input, let's try going - // byte after byte in hope we skip it completely - *cp = MULTIBYTE_INVALID; - *nbytep = 1; - return TERMKEY_RES_KEY; - } - - // We can't really get E2BIG so what the fuck is going on here - abort (); - } - return TERMKEY_RES_KEY; -} - -static void -emit_codepoint (termkey_t *tk, uint32_t codepoint, termkey_key_t *key) -{ - if (codepoint < 0x20) - { - // C0 range - key->code.codepoint = 0; - key->modifiers = 0; - - if (!(tk->flags & TERMKEY_FLAG_NOINTERPRET) - && tk->c0[codepoint].sym != TERMKEY_SYM_UNKNOWN) - { - key->code.sym = tk->c0[codepoint].sym; - key->modifiers |= tk->c0[codepoint].modifier_set; - } - - if (!key->code.sym) - { - key->type = TERMKEY_TYPE_KEY; - /* Generically modified Unicode ought not report the SHIFT state, - * or else we get into complications trying to report Shift-; vs : - * and so on... In order to be able to represent Ctrl-Shift-A as - * CTRL modified unicode A, we need to call Ctrl-A simply 'a', - * lowercase - */ - if (codepoint + 0x40 >= 'A' && codepoint + 0x40 <= 'Z') - // It's a letter - use lowecase instead - key->code.codepoint = codepoint + 0x60; - else - key->code.codepoint = codepoint + 0x40; - key->modifiers = TERMKEY_KEYMOD_CTRL; - } - else - key->type = TERMKEY_TYPE_KEYSYM; - } - else if (codepoint == 0x7f && !(tk->flags & TERMKEY_FLAG_NOINTERPRET)) - { - // ASCII DEL - key->type = TERMKEY_TYPE_KEYSYM; - key->code.sym = TERMKEY_SYM_DEL; - key->modifiers = 0; - } - else - { - key->type = TERMKEY_TYPE_KEY; - key->code.codepoint = codepoint; - key->modifiers = 0; - } - - termkey_canonicalise (tk, key); - - if (key->type == TERMKEY_TYPE_KEY) - fill_multibyte (tk, key); -} - -void -termkey_canonicalise (termkey_t *tk, termkey_key_t *key) -{ - int flags = tk->canonflags; - - if (flags & TERMKEY_CANON_SPACESYMBOL) - { - if (key->type == TERMKEY_TYPE_KEY && key->code.codepoint == 0x20) - { - key->type = TERMKEY_TYPE_KEYSYM; - key->code.sym = TERMKEY_SYM_SPACE; - } - } - else - { - if (key->type == TERMKEY_TYPE_KEYSYM - && key->code.sym == TERMKEY_SYM_SPACE) - { - key->type = TERMKEY_TYPE_KEY; - key->code.codepoint = 0x20; - fill_multibyte (tk, key); - } - } - - if (flags & TERMKEY_CANON_DELBS) - if (key->type == TERMKEY_TYPE_KEYSYM - && key->code.sym == TERMKEY_SYM_DEL) - key->code.sym = TERMKEY_SYM_BACKSPACE; -} - -static termkey_result_t -peekkey (termkey_t *tk, termkey_key_t *key, int force, size_t *nbytep) -{ - int again = 0; - - if (!tk->is_started) - { - errno = EINVAL; - return TERMKEY_RES_ERROR; - } - -#ifdef DEBUG - fprintf (stderr, "getkey(force=%d): buffer ", force); - print_buffer (tk); - fprintf (stderr, "\n"); -#endif - - if (tk->hightide) - { - tk->buffstart += tk->hightide; - tk->buffcount -= tk->hightide; - tk->hightide = 0; - } - - termkey_result_t ret; - termkey_driver_node_t *p; - for (p = tk->drivers; p; p = p->next) - { - ret = (p->driver->peekkey) (tk, p->info, key, force, nbytep); - -#ifdef DEBUG - fprintf (stderr, "Driver %s yields %s\n", - p->driver->name, res2str (ret)); -#endif - - switch (ret) - { - case TERMKEY_RES_KEY: - { -#ifdef DEBUG - print_key (tk, key); fprintf (stderr, "\n"); -#endif - // Slide the data down to stop it running away - size_t halfsize = tk->buffsize / 2; - if (tk->buffstart > halfsize) - { - memcpy (tk->buffer, tk->buffer + halfsize, halfsize); - tk->buffstart -= halfsize; - } - - /* fallthrough */ - } - case TERMKEY_RES_EOF: - case TERMKEY_RES_ERROR: - return ret; - - case TERMKEY_RES_AGAIN: - if (!force) - again = 1; - case TERMKEY_RES_NONE: - break; - } - } - - if (again) - return TERMKEY_RES_AGAIN; - - ret = peekkey_simple (tk, key, force, nbytep); - -#ifdef DEBUG - fprintf (stderr, "getkey_simple(force=%d) yields %s\n", - force, res2str (ret)); - if (ret == TERMKEY_RES_KEY) - { - print_key (tk, key); - fprintf (stderr, "\n"); - } -#endif - - return ret; -} - -static termkey_result_t -peekkey_simple (termkey_t *tk, termkey_key_t *key, int force, size_t *nbytep) -{ - if (tk->buffcount == 0) - return tk->is_closed ? TERMKEY_RES_EOF : TERMKEY_RES_NONE; - - unsigned char b0 = CHARAT (0); - if (b0 == 0x1b) - { - // Escape-prefixed value? Might therefore be Alt+key - if (tk->buffcount == 1) - { - // This might be an <Esc> press, or it may want to be part - // of a longer sequence - if (!force) - return TERMKEY_RES_AGAIN; - - (*tk->method.emit_codepoint) (tk, b0, key); - *nbytep = 1; - return TERMKEY_RES_KEY; - } - - // Try another key there - tk->buffstart++; - tk->buffcount--; - - // Run the full driver - termkey_result_t metakey_result = peekkey (tk, key, force, nbytep); - - tk->buffstart--; - tk->buffcount++; - - switch (metakey_result) - { - case TERMKEY_RES_KEY: - key->modifiers |= TERMKEY_KEYMOD_ALT; - (*nbytep)++; - break; - - case TERMKEY_RES_NONE: - case TERMKEY_RES_EOF: - case TERMKEY_RES_AGAIN: - case TERMKEY_RES_ERROR: - break; - } - - return metakey_result; - } - else if (!(tk->flags & TERMKEY_FLAG_RAW)) - { - uint32_t codepoint; - termkey_result_t res = parse_multibyte - (tk, tk->buffer + tk->buffstart, tk->buffcount, &codepoint, nbytep); - - if (res == TERMKEY_RES_AGAIN && force) - { - /* There weren't enough bytes for a complete character but - * caller demands an answer. About the best thing we can do here - * is eat as many bytes as we have, and emit a MULTIBYTE_INVALID. - * If the remaining bytes arrive later, they'll be invalid too. - */ - codepoint = MULTIBYTE_INVALID; - *nbytep = tk->buffcount; - res = TERMKEY_RES_KEY; - } - - key->type = TERMKEY_TYPE_KEY; - key->modifiers = 0; - (*tk->method.emit_codepoint) (tk, codepoint, key); - return res; - } - else - { - // Non multibyte case - just report the raw byte - key->type = TERMKEY_TYPE_KEY; - key->code.codepoint = b0; - key->modifiers = 0; - - key->multibyte[0] = b0; - key->multibyte[1] = 0; - - *nbytep = 1; - return TERMKEY_RES_KEY; - } -} - -static termkey_result_t -peekkey_mouse (termkey_t *tk, termkey_key_t *key, size_t *nbytep) -{ - if (tk->buffcount < 3) - return TERMKEY_RES_AGAIN; - - key->type = TERMKEY_TYPE_MOUSE; - key->code.mouse[0] = CHARAT (0) - 0x20; - key->code.mouse[1] = CHARAT (1) - 0x20; - key->code.mouse[2] = CHARAT (2) - 0x20; - key->code.mouse[3] = 0; - - key->modifiers = (key->code.mouse[0] & 0x1c) >> 2; - key->code.mouse[0] &= ~0x1c; - - *nbytep = 3; - return TERMKEY_RES_KEY; -} - -termkey_result_t -termkey_getkey (termkey_t *tk, termkey_key_t *key) -{ - size_t nbytes = 0; - termkey_result_t ret = peekkey (tk, key, 0, &nbytes); - - if (ret == TERMKEY_RES_KEY) - eat_bytes (tk, nbytes); - - if (ret == TERMKEY_RES_AGAIN) - /* Call peekkey() again in force mode to obtain whatever it can */ - (void) peekkey (tk, key, 1, &nbytes); - /* Don't eat it yet though */ - - return ret; -} - -termkey_result_t -termkey_getkey_force (termkey_t *tk, termkey_key_t *key) -{ - size_t nbytes = 0; - termkey_result_t ret = peekkey (tk, key, 1, &nbytes); - - if (ret == TERMKEY_RES_KEY) - eat_bytes (tk, nbytes); - - return ret; -} - -termkey_result_t -termkey_waitkey (termkey_t *tk, termkey_key_t *key) -{ - if (tk->fd == -1) - { - errno = EBADF; - return TERMKEY_RES_ERROR; - } - - while (1) - { - termkey_result_t ret = termkey_getkey (tk, key); - - switch (ret) - { - case TERMKEY_RES_KEY: - case TERMKEY_RES_EOF: - case TERMKEY_RES_ERROR: - return ret; - - case TERMKEY_RES_NONE: - ret = termkey_advisereadable (tk); - if (ret == TERMKEY_RES_ERROR) - return ret; - break; - - case TERMKEY_RES_AGAIN: - { - if (tk->is_closed) - // We're closed now. Never going to get more bytes - // so just go with what we have - return termkey_getkey_force (tk, key); - - struct pollfd fd; -retry: - fd.fd = tk->fd; - fd.events = POLLIN; - - int pollret = poll (&fd, 1, tk->waittime); - if (pollret == -1) - { - if (errno == EINTR && !(tk->flags & TERMKEY_FLAG_EINTR)) - goto retry; - - return TERMKEY_RES_ERROR; - } - - if (fd.revents & (POLLIN | POLLHUP | POLLERR)) - ret = termkey_advisereadable (tk); - else - ret = TERMKEY_RES_NONE; - - if (ret == TERMKEY_RES_ERROR) - return ret; - if (ret == TERMKEY_RES_NONE) - return termkey_getkey_force (tk, key); - } - } - } - - /* UNREACHABLE */ -} - -termkey_result_t -termkey_advisereadable (termkey_t *tk) -{ - if (tk->fd == -1) - { - errno = EBADF; - return TERMKEY_RES_ERROR; - } - - if (tk->buffstart) - { - memmove (tk->buffer, tk->buffer + tk->buffstart, tk->buffcount); - tk->buffstart = 0; - } - - /* Not expecting it ever to be greater but doesn't hurt to handle that */ - if (tk->buffcount >= tk->buffsize) - { - errno = ENOMEM; - return TERMKEY_RES_ERROR; - } - - ssize_t len; -retry: - len = read (tk->fd, tk->buffer + tk->buffcount, - tk->buffsize - tk->buffcount); - - if (len == -1) - { - if (errno == EAGAIN) - return TERMKEY_RES_NONE; - if (errno == EINTR && !(tk->flags & TERMKEY_FLAG_EINTR)) - goto retry; - return TERMKEY_RES_ERROR; - } - if (len < 1) - { - tk->is_closed = true; - return TERMKEY_RES_NONE; - } - tk->buffcount += len; - return TERMKEY_RES_AGAIN; -} - -size_t -termkey_push_bytes (termkey_t *tk, const char *bytes, size_t len) -{ - if (tk->buffstart) - { - memmove (tk->buffer, tk->buffer + tk->buffstart, tk->buffcount); - tk->buffstart = 0; - } - - /* Not expecting it ever to be greater but doesn't hurt to handle that */ - if (tk->buffcount >= tk->buffsize) - { - errno = ENOMEM; - return (size_t)-1; - } - - if (len > tk->buffsize - tk->buffcount) - len = tk->buffsize - tk->buffcount; - - // memcpy(), not strncpy() in case of null bytes in input - memcpy (tk->buffer + tk->buffcount, bytes, len); - tk->buffcount += len; - - return len; -} - -termkey_sym_t -termkey_register_keyname (termkey_t *tk, termkey_sym_t sym, const char *name) -{ - if (!sym) - sym = tk->nkeynames; - - if (sym >= tk->nkeynames) - { - const char **new_keynames = - realloc (tk->keynames, sizeof new_keynames[0] * (sym + 1)); - if (!new_keynames) - return -1; - - tk->keynames = new_keynames; - - // Fill in the hole - for (int i = tk->nkeynames; i < sym; i++) - tk->keynames[i] = NULL; - - tk->nkeynames = sym + 1; - } - - tk->keynames[sym] = name; - return sym; -} - -const char * -termkey_get_keyname (termkey_t *tk, termkey_sym_t sym) -{ - if (sym == TERMKEY_SYM_UNKNOWN) - return "UNKNOWN"; - if (sym < tk->nkeynames) - return tk->keynames[sym]; - return "UNKNOWN"; -} - -static const char * -termkey_lookup_keyname_format (termkey_t *tk, - const char *str, termkey_sym_t *sym, termkey_format_t format) -{ - /* We store an array, so we can't do better than a linear search. Doesn't - * matter because user won't be calling this too often */ - - for (*sym = 0; *sym < tk->nkeynames; (*sym)++) - { - const char *thiskey = tk->keynames[*sym]; - if (!thiskey) - continue; - size_t len = strlen (thiskey); - if (format & TERMKEY_FORMAT_LOWERSPACE) - { - const char *thisstr = str; - if (strpncmp_camel (&thisstr, &thiskey, len) == 0) - return thisstr; - } - else if (!strncmp (str, thiskey, len)) - return (char *) str + len; - } - return NULL; -} - -const char * -termkey_lookup_keyname (termkey_t *tk, const char *str, termkey_sym_t *sym) -{ - return termkey_lookup_keyname_format (tk, str, sym, 0); -} - -termkey_sym_t -termkey_keyname2sym (termkey_t *tk, const char *keyname) -{ - termkey_sym_t sym; - const char *endp = termkey_lookup_keyname (tk, keyname, &sym); - if (!endp || endp[0]) - return TERMKEY_SYM_UNKNOWN; - return sym; -} - -static termkey_sym_t -register_c0 (termkey_t *tk, - termkey_sym_t sym, unsigned char ctrl, const char *name) -{ - return register_c0_full (tk, sym, 0, 0, ctrl, name); -} - -static termkey_sym_t -register_c0_full (termkey_t *tk, termkey_sym_t sym, - int modifier_set, int modifier_mask, unsigned char ctrl, const char *name) -{ - if (ctrl >= 0x20) - { - errno = EINVAL; - return -1; - } - - if (name) - sym = termkey_register_keyname (tk, sym, name); - - tk->c0[ctrl].sym = sym; - tk->c0[ctrl].modifier_set = modifier_set; - tk->c0[ctrl].modifier_mask = modifier_mask; - return sym; -} - -static struct modnames -{ - const char *shift, *alt, *ctrl; -} -modnames[] = -{ - { "S", "A", "C" }, // 0 - { "Shift", "Alt", "Ctrl" }, // LONGMOD - { "S", "M", "C" }, // ALTISMETA - { "Shift", "Meta", "Ctrl" }, // ALTISMETA+LONGMOD - { "s", "a", "c" }, // LOWERMOD - { "shift", "alt", "ctrl" }, // LOWERMOD+LONGMOD - { "s", "m", "c" }, // LOWERMOD+ALTISMETA - { "shift", "meta", "ctrl" }, // LOWERMOD+ALTISMETA+LONGMOD -}; - -size_t -termkey_strfkey (termkey_t *tk, char *buffer, size_t len, - termkey_key_t *key, termkey_format_t format) -{ - size_t pos = 0; - size_t l = 0; - - struct modnames *mods = &modnames[ - !!(format & TERMKEY_FORMAT_LONGMOD) + - !!(format & TERMKEY_FORMAT_ALTISMETA) * 2 + - !!(format & TERMKEY_FORMAT_LOWERMOD) * 4]; - - int wrapbracket = (format & TERMKEY_FORMAT_WRAPBRACKET) && - (key->type != TERMKEY_TYPE_KEY || key->modifiers != 0); - - char sep = (format & TERMKEY_FORMAT_SPACEMOD) ? ' ' : '-'; - - if (format & TERMKEY_FORMAT_CARETCTRL && - key->type == TERMKEY_TYPE_KEY && - key->modifiers == TERMKEY_KEYMOD_CTRL) - { - uint32_t codepoint = key->code.codepoint; - - // Handle some of the special casesfirst - if (codepoint >= 'a' && codepoint <= 'z') - { - l = snprintf (buffer + pos, len - pos, - wrapbracket ? "<^%c>" : "^%c", (char) codepoint - 0x20); - if (l <= 0) - return pos; - pos += l; - return pos; - } - else if ((codepoint >= '@' && codepoint < 'A') || - (codepoint > 'Z' && codepoint <= '_')) - { - l = snprintf (buffer + pos, len - pos, - wrapbracket ? "<^%c>" : "^%c", (char) codepoint); - if(l <= 0) - return pos; - pos += l; - return pos; - } - } - - if (wrapbracket) - { - l = snprintf (buffer + pos, len - pos, "<"); - if (l <= 0) - return pos; - pos += l; - } - - if (key->modifiers & TERMKEY_KEYMOD_ALT) - { - l = snprintf (buffer + pos, len - pos, "%s%c", mods->alt, sep); - if (l <= 0) - return pos; - pos += l; - } - if (key->modifiers & TERMKEY_KEYMOD_CTRL) - { - l = snprintf (buffer + pos, len - pos, "%s%c", mods->ctrl, sep); - if (l <= 0) - return pos; - pos += l; - } - if (key->modifiers & TERMKEY_KEYMOD_SHIFT) - { - l = snprintf (buffer + pos, len - pos, "%s%c", mods->shift, sep); - if (l <= 0) - return pos; - pos += l; - } - - switch (key->type) - { - case TERMKEY_TYPE_KEY: - if (!key->multibyte[0]) // In case of user-supplied key structures - fill_multibyte (tk, key); - l = snprintf (buffer + pos, len - pos, "%s", key->multibyte); - break; - case TERMKEY_TYPE_KEYSYM: - { - const char *name = termkey_get_keyname (tk, key->code.sym); - if (format & TERMKEY_FORMAT_LOWERSPACE) - l = snprint_cameltospaces (buffer + pos, len - pos, name); - else - l = snprintf (buffer + pos, len - pos, "%s", name); - break; - } - case TERMKEY_TYPE_FUNCTION: - l = snprintf (buffer + pos, len - pos, "%c%d", - (format & TERMKEY_FORMAT_LOWERSPACE ? 'f' : 'F'), key->code.number); - break; - case TERMKEY_TYPE_MOUSE: - { - termkey_mouse_event_t ev; - int button; - int line, col; - termkey_interpret_mouse (tk, key, &ev, &button, &line, &col); - - static const char *evnames[] = - { "Unknown", "Press", "Drag", "Release" }; - l = snprintf (buffer + pos, len - pos, - "Mouse%s(%d)", evnames[ev], button); - if (format & TERMKEY_FORMAT_MOUSE_POS) - { - if (l <= 0) - return pos; - pos += l; - l = snprintf (buffer + pos, len - pos, " @ (%u,%u)", col, line); - } - break; - } - case TERMKEY_TYPE_POSITION: - l = snprintf (buffer + pos, len - pos, "Position"); - break; - case TERMKEY_TYPE_MODEREPORT: - { - int initial, mode, value; - termkey_interpret_modereport (tk, key, &initial, &mode, &value); - if (initial) - l = snprintf (buffer + pos, len - pos, - "Mode(%c%d=%d)", initial, mode, value); - else - l = snprintf (buffer + pos, len - pos, - "Mode(%d=%d)", mode, value); - break; - } - case TERMKEY_TYPE_UNKNOWN_CSI: - l = snprintf (buffer + pos, len - pos, - "CSI %c", key->code.number & 0xff); - break; - } - - if (l <= 0) - return pos; - pos += l; - - if (wrapbracket) - { - l = snprintf (buffer + pos, len - pos, ">"); - if (l <= 0) - return pos; - pos += l; - } - return pos; -} - -const char * -termkey_strpkey (termkey_t *tk, - const char *str, termkey_key_t *key, termkey_format_t format) -{ - struct modnames *mods = &modnames[ - !!(format & TERMKEY_FORMAT_LONGMOD) + - !!(format & TERMKEY_FORMAT_ALTISMETA) * 2 + - !!(format & TERMKEY_FORMAT_LOWERMOD) * 4]; - - key->modifiers = 0; - - if ((format & TERMKEY_FORMAT_CARETCTRL) && str[0] == '^' && str[1]) - { - str = termkey_strpkey (tk, - str + 1, key, format & ~TERMKEY_FORMAT_CARETCTRL); - - if (!str - || key->type != TERMKEY_TYPE_KEY - || key->code.codepoint < '@' - || key->code.codepoint > '_' - || key->modifiers != 0) - return NULL; - - if (key->code.codepoint >= 'A' - && key->code.codepoint <= 'Z') - key->code.codepoint += 0x20; - key->modifiers = TERMKEY_KEYMOD_CTRL; - fill_multibyte (tk, key); - return (char *) str; - } - - const char *sep_at; - while ((sep_at = strchr (str, - (format & TERMKEY_FORMAT_SPACEMOD) ? ' ' : '-'))) - { - size_t n = sep_at - str; - if (n == strlen (mods->alt) && !strncmp (mods->alt, str, n)) - key->modifiers |= TERMKEY_KEYMOD_ALT; - else if (n == strlen (mods->ctrl) && !strncmp (mods->ctrl, str, n)) - key->modifiers |= TERMKEY_KEYMOD_CTRL; - else if (n == strlen (mods->shift) && !strncmp (mods->shift, str, n)) - key->modifiers |= TERMKEY_KEYMOD_SHIFT; - else - break; - - str = sep_at + 1; - } - - size_t nbytes; - ssize_t snbytes; - const char *endstr; - - if ((endstr = termkey_lookup_keyname_format - (tk, str, &key->code.sym, format))) - { - key->type = TERMKEY_TYPE_KEYSYM; - str = endstr; - } - else if (sscanf(str, "F%d%zn", &key->code.number, &snbytes) == 1) - { - key->type = TERMKEY_TYPE_FUNCTION; - str += snbytes; - } - // Multibyte must be last - else if (parse_multibyte (tk, (unsigned const char *) str, strlen (str), - &key->code.codepoint, &nbytes) == TERMKEY_RES_KEY) - { - key->type = TERMKEY_TYPE_KEY; - fill_multibyte (tk, key); - str += nbytes; - } - // TODO: Consider mouse events? - else - return NULL; - - termkey_canonicalise (tk, key); - return (char *) str; -} - -int -termkey_keycmp (termkey_t *tk, - const termkey_key_t *key1p, const termkey_key_t *key2p) -{ - /* Copy the key structs since we'll be modifying them */ - termkey_key_t key1 = *key1p, key2 = *key2p; - - termkey_canonicalise (tk, &key1); - termkey_canonicalise (tk, &key2); - - if (key1.type != key2.type) - return key1.type - key2.type; - - switch (key1.type) - { - case TERMKEY_TYPE_KEY: - if (key1.code.codepoint != key2.code.codepoint) - return key1.code.codepoint - key2.code.codepoint; - break; - case TERMKEY_TYPE_KEYSYM: - if (key1.code.sym != key2.code.sym) - return key1.code.sym - key2.code.sym; - break; - case TERMKEY_TYPE_FUNCTION: - case TERMKEY_TYPE_UNKNOWN_CSI: - if (key1.code.number != key2.code.number) - return key1.code.number - key2.code.number; - break; - case TERMKEY_TYPE_MOUSE: - { - int cmp = strncmp (key1.code.mouse, key2.code.mouse, 4); - if (cmp != 0) - return cmp; - break; - } - case TERMKEY_TYPE_POSITION: - { - int line1, col1, line2, col2; - termkey_interpret_position (tk, &key1, &line1, &col1); - termkey_interpret_position (tk, &key2, &line2, &col2); - if (line1 != line2) - return line1 - line2; - return col1 - col2; - } - case TERMKEY_TYPE_MODEREPORT: - { - int initial1, initial2, mode1, mode2, value1, value2; - termkey_interpret_modereport (tk, &key1, &initial1, &mode1, &value1); - termkey_interpret_modereport (tk, &key2, &initial2, &mode2, &value2); - if (initial1 != initial2) - return initial1 - initial2; - if (mode1 != mode2) - return mode1 - mode2; - return value1 - value2; - } - } - return key1.modifiers - key2.modifiers; -} - |