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key.c
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key.c
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/*
* key.c, femto, Hugh Barney, Public Domain, 2017
* Derived from: Anthony's Editor January 93, (Public Domain 1991, 1993 by Anthony Howe)
*/
#include "header.h"
keymap_t *new_key(char *name, char *bytes)
{
keymap_t *kp = (keymap_t *)malloc(sizeof(keymap_t));
assert(kp != NULL);
strncpy(kp->k_name, name, MAX_KNAME);
strncpy(kp->k_bytes, bytes, MAX_KBYTES);
kp->k_name[MAX_KNAME] ='\0';
kp->k_bytes[MAX_KBYTES] ='\0';
kp->k_func = user_func;
strcpy(kp->k_funcname, E_NOT_BOUND);
kp->k_next = NULL;
return kp;
}
/* note, no check if name already exists */
void make_key(char *name, char *bytes)
{
keymap_t *kp = new_key(name, bytes);
ktail->k_next = kp;
ktail = kp;
}
void create_keys()
{
char ch;
char ctrx_map1[] = "c-x c-|";
char ctrx_map2[] = "c-x x";
char ctrc_map1[] = "c-c c-|";
char ctrc_map2[] = "c-c x";
char ctrl_map[] = "c-|";
char esc_map[] = "esc-|";
char ctrx_bytes[] = "\x18\x01";
char ctrc_bytes[] = "\x03\x01";
char ctrl_bytes[] = "\x01";
char esc_bytes[] = "\x1B\x61";
assert(khead == NULL);
khead = ktail = new_key("c-space", "\x00");
/* control-a to z */
for (ch = 1; ch <= 26; ch++) {
if (ch == 3 || ch == 9 || ch == 10 || ch == 24) continue; /* skip c-c, tab, linefeed, ctrl-x */
ctrl_map[2] = ch + 96; /* ASCII a is 97 */
ctrl_bytes[0] = ch;
make_key(ctrl_map, ctrl_bytes);
}
/* esc-a to z */
for (ch = 1; ch <= 26; ch++) {
esc_map[4] = ch + 96;
esc_bytes[1] = ch + 96;
make_key(esc_map, esc_bytes);
}
/* control-x control-a to z */
for (ch = 1; ch <= 26; ch++) {
ctrx_map1[6] = ch + 96;
ctrx_bytes[1] = ch;
make_key(ctrx_map1, ctrx_bytes);
}
/* control-x a to z */
for (ch = 1; ch <= 26; ch++) {
ctrx_map2[4] = ch + 96;
ctrx_bytes[1] = ch + 96;
make_key(ctrx_map2, ctrx_bytes);
}
/* control-c control-a to z */
for (ch = 1; ch <= 26; ch++) {
ctrc_map1[6] = ch + 96;
ctrc_bytes[1] = ch;
make_key(ctrc_map1, ctrc_bytes);
}
/* control-c a to z */
for (ch = 1; ch <= 26; ch++) {
ctrc_map2[4] = ch + 96;
ctrc_bytes[1] = ch + 96;
make_key(ctrc_map2, ctrc_bytes);
}
}
int set_key_internal(char *name, char *funcname, char *bytes, void (*func)(void))
{
keymap_t *kp;
/* check if we have an existing key, if so update it */
for (kp = khead; kp->k_next != NULL; kp = kp->k_next) {
if (0 == strcmp(kp->k_name, name)) {
strncpy(kp->k_funcname, funcname, MAX_KFUNC);
kp->k_funcname[MAX_KFUNC] ='\0';
if (func != NULL) /* dont set if its a user_func */
kp->k_func = func;
else
kp->k_func = user_func;
if (strcmp("user_func", funcname) != 0)
(void)register_command(funcname, func);
return 1;
}
}
/* not found, create it and add onto the tail */
kp = new_key(name, bytes);
strncpy(kp->k_funcname, funcname, MAX_KFUNC);
kp->k_funcname[MAX_KFUNC] ='\0';
kp->k_func = func;
ktail->k_next = kp;
ktail = kp;
if (strcmp("user_func", funcname) != 0)
(void)register_command(funcname, func);
return 1;
}
int set_key(char *name, char *funcname)
{
return set_key_internal(name, funcname, "", NULL);
}
void setup_keys()
{
create_keys();
set_key_internal("c-a", "beginning-of-line" , "\x01", lnbegin);
set_key_internal("c-b", "backward-char" , "\x02", left);
set_key_internal("c-d", "delete" , "\x04", delete);
set_key_internal("c-e", "end-of-line" , "\x05", lnend);
set_key_internal("c-f", "forward-char" , "\x06", right);
set_key_internal("c-n", "next-line" , "\x0E", down);
set_key_internal("c-p", "previous-line" , "\x10", up);
set_key_internal("c-h", "backspace" , "\x08", backspace);
set_key_internal("c-k", "kill-to-eol" , "\x0B", user_func);
set_key_internal("c-l", "refresh" , "\x0C", redraw);
set_key_internal("c-n", "next-line" , "\x0E", down);
set_key_internal("c-p", "previous-line" , "\x10", up);
set_key_internal("c-r", "search-backward" , "\x12", search);
set_key_internal("c-s", "search-forward" , "\x13", search);
set_key_internal("c-u", "undo" , "\x15", undo_command);
set_key_internal("c-v", "forward-page" , "\x16", forward_page);
set_key_internal("c-w", "kill-region" , "\x17", kill_region);
set_key_internal("c-y", "yank" , "\x19", yank);
set_key_internal("esc-!", "shell-command" , "\x1B\x21", user_func);
set_key_internal("esc-a", "apropos" , "\x1B\x61", apropos);
set_key_internal("esc-b", "backward-word" , "\x1B\x62", backward_word);
set_key_internal("esc-c", "copy-region" , "\x1B\x63", copy_region);
set_key_internal("esc-d", "kill-to-eol" , "\x1B\x64", user_func);
set_key_internal("esc-f", "forward-word" , "\x1B\x66", forward_word);
set_key_internal("esc-g", "goto-line" , "\x1B\x67", i_gotoline);
set_key_internal("esc-i", "yank" , "\x1B\x69", yank);
set_key_internal("esc-k", "kill-region" , "\x1B\x6B", kill_region);
set_key_internal("esc-l", "describe-bindings" , "\x1B\x6C", describe_bindings);
set_key_internal("esc-m", "set-mark" , "\x1B\x6D", i_set_mark);
set_key_internal("esc-n", "next-buffer" , "\x1B\x6E", next_buffer);
set_key_internal("esc-o", "delete-other-windows" , "\x1B\x6F", delete_other_windows);
set_key_internal("esc-r", "query-replace" , "\x1B\x72", query_replace);
set_key_internal("esc-v", "page-up" , "\x1B\x76", backward_page);
set_key_internal("esc-w", "copy-region" , "\x1B\x77", copy_region);
set_key_internal("esc-x", "execute-command" , "\x1B\x78", execute_command);
set_key_internal("esc-up", "beginning-of-buffer" , "\x1B\x1B\x5B\x41", beginning_of_buffer);
set_key_internal("esc-down", "end-of-buffer" , "\x1B\x1B\x5B\x42", end_of_buffer);
set_key_internal("esc-right", "user-func" , "\x1B\x1B\x5B\x43", user_func);
set_key_internal("esc-left", "user-func" , "\x1B\x1B\x5B\x44", user_func);
set_key_internal("esc-end", "end-of-buffer" , "\x1B\x1B\x4F\x46", end_of_buffer);
set_key_internal("esc-home", "beginning-of-buffer" , "\x1B\x1B\x4F\x48", beginning_of_buffer);
set_key_internal("esc-@", "set-mark" , "\x1B\x40", i_set_mark);
set_key_internal("esc-<", "beginning-of-buffer" , "\x1B\x3C", beginning_of_buffer);
set_key_internal("esc->", "end-of-buffer" , "\x1B\x3E", end_of_buffer);
set_key_internal("esc-]", "eval-block" , "\x1B\x5D", eval_block);
set_key_internal("esc-:", "exec-lisp-command" , "\x1B\x3A", repl);
set_key_internal("esc-;", "exec-lisp-command" , "\x1B\x3B", repl); // femto
set_key_internal("esc-.", "user-func" , "\x1B\x2E", user_func);
set_key_internal("up ", "previous-line", "\x1B\x5B\x41", up);
set_key_internal("down", "next-line", "\x1B\x5B\x42", down);
set_key_internal("left", "backward-char", "\x1B\x5B\x44", left);
set_key_internal("right", "forward-char", "\x1B\x5B\x43", right);
set_key_internal("home", "beginning-of-line", "\x1B\x4F\x48", lnbegin);
set_key_internal("end", "end-of-line", "\x1B\x4F\x46", lnend);
set_key_internal("del", "delete", "\x1B\x5B\x33\x7E", delete);
set_key_internal("ins", "toggle-overwrite-mode" , "\x1B\x5B\x32\x7E", toggle_overwrite_mode);
set_key_internal("pgup", "page-up", "\x1B\x5B\x35\x7E", backward_page);
set_key_internal("pgdn", "page-down", "\x1B\x5B\x36\x7E", forward_page);
set_key_internal("backspace", "backspace", "\x7f", backspace);
set_key_internal("c-x c-c", "exit" , "\x18\x03", quit_ask);
set_key_internal("c-x c-f", "find-file" , "\x18\x06", i_readfile);
set_key_internal("c-x c-n", "next-buffer" , "\x18\x0E", next_buffer);
set_key_internal("c-x c-s", "save-buffer" , "\x18\x13", savebuffer);
set_key_internal("c-x c-w", "write-file" , "\x18\x17", writefile);
set_key_internal("c-x 1", "delete-other-windows" , "\x18\x31", delete_other_windows);
set_key_internal("c-x 2", "split-window" , "\x18\x32", split_window);
set_key_internal("c-x =", "cursor-position" , "\x18\x3D", cursor_position);
set_key_internal("c-x ?", "user-func" , "\x18\x3F", user_func);
set_key_internal("c-x b", "list-buffers" , "\x18\x62", list_buffers);
set_key_internal("c-x k", "kill-buffer" , "\x18\x6B", kill_buffer);
set_key_internal("c-x n", "next-buffer" , "\x18\x6E", next_buffer);
set_key_internal("c-x o", "other-window" , "\x18\x6F", other_window);
set_key_internal("c-x @", "user-func" , "\x18\x40", user_func);
set_key_internal("c-x (", "user-func" , "\x18\x28", user_func);
set_key_internal("c-x )", "user-func" , "\x18\x29", user_func);
set_key_internal("c-x `", "user-func" , "\x18\x60", user_func);
set_key_internal("c-space", "set-mark" , "\x00", i_set_mark);
set_key_internal("c-]", "user-func" , "\x1D", user_func);
set_key_internal("resize", "resize" , "\x9A", resize_terminal);
set_key_internal("c-c f", "describe-functions" , "\x03\x66", describe_functions);
register_command("show-version", version);
}
char_t *get_key(keymap_t *keys, keymap_t **key_return)
{
keymap_t *k;
int submatch;
static char_t buffer[K_BUFFER_LENGTH];
static char_t *record = buffer;
*key_return = NULL;
/* if recorded bytes remain, return next recorded byte. */
if (*record != '\0') {
*key_return = NULL;
return record++;
}
/* reset record buffer. */
record = buffer;
do {
assert(K_BUFFER_LENGTH > record - buffer);
/* read and record one byte. */
*record++ = (unsigned)getch();
*record = '\0';
/* if recorded bytes match any multi-byte sequence... */
for (k = keys, submatch = 0; k != NULL; k = k->k_next) {
char_t *p, *q;
if (k->k_func == NULL) continue;
assert(k->k_bytes != NULL);
for (p = buffer, q = (char_t *)k->k_bytes; *p == *q; ++p, ++q) {
/* an exact match */
if (*q == '\0' && *p == '\0') {
record = buffer;
*record = '\0';
*key_return = k;
return record; /* empty string */
}
}
/* record bytes match part of a command sequence */
if (*p == '\0' && *q != '\0') {
submatch = 1;
}
}
} while (submatch);
/* nothing matched, return recorded bytes. */
record = buffer;
return (record++);
}
/* wrapper to simplify call and dependancies in the interface code */
char *get_input_key()
{
return (char *)get_key(khead, &key_return);
}
/* the name of the bound function of this key */
char *get_key_funcname()
{
return (key_return != NULL ? key_return->k_funcname : "");
}
/* the name of the last key */
char *get_key_name()
{
return (key_return != NULL ? key_return->k_name : "");
}
/* execute the function of the last bound key */
void execute_key()
{
if (key_return != NULL)
(key_return->k_func)();
}
int getinput(char *prompt, char *buf, int nbuf, int flag)
{
int cpos = 0;
int c;
int start_col = strlen(prompt);
mvaddstr(MSGLINE, 0, prompt);
clrtoeol();
if (flag == F_CLEAR) buf[0] = '\0';
/* if we have a default value print it and go to end of it */
if (buf[0] != '\0') {
addstr(buf);
cpos = strlen(buf);
}
for (;;) {
refresh();
c = getch();
/* ignore control keys other than backspace, cr, lf */
if (c < 32 && c != 0x07 && c != 0x08 && c != 0x0a && c != 0x0d)
continue;
switch(c) {
case 0x0a: /* cr, lf */
case 0x0d:
buf[cpos] = '\0';
return (cpos > 0 ? TRUE : FALSE);
case 0x07: /* ctrl-g */
buf[0] = '\0';
return FALSE;
case 0x7f: /* del, erase */
case 0x08: /* backspace */
if (cpos == 0)
continue;
move(MSGLINE, start_col + cpos - 1);
addch(' ');
move(MSGLINE, start_col + cpos - 1);
buf[--cpos] = '\0';
break;
default:
if (cpos < nbuf -1) {
addch(c);
buf[cpos++] = c;
buf[cpos] ='\0';
}
break;
}
}
}
/*
* Local Variables:
* c-file-style: "k&r"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/