Denote general status with return codes, not special key symbols
This commit is contained in:
Paul LeoNerd Evans
parent
a503403226
commit
6294cca6f9
3
demo.c
3
demo.c
@ -20,9 +20,10 @@ int main(int argc, char *argv[]) {
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termkey_t *tk = termkey_new(0, TERMKEY_FLAG_CONVERTKP);
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termkey_result ret;
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termkey_key key;
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while(termkey_waitkey(tk, &key) && key.code != TERMKEY_SYM_EOF) {
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while((ret = termkey_waitkey(tk, &key)) != TERMKEY_RES_EOF) {
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if(key.flags & TERMKEY_KEYFLAG_SPECIAL)
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printf("Key %s%s%s%s (code %d)\n",
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key.modifiers & TERMKEY_KEYMOD_SHIFT ? "S-" : "",
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86
termkey.c
86
termkey.c
@ -44,7 +44,7 @@ static inline void eatbytes(termkey_t *tk, size_t count)
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tk->buffvalid -= count;
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}
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static int getkey_csi(termkey_t *tk, size_t introlen, termkey_key *key)
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static termkey_result getkey_csi(termkey_t *tk, size_t introlen, termkey_key *key)
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{
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size_t csi_end = introlen;
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@ -54,10 +54,8 @@ static int getkey_csi(termkey_t *tk, size_t introlen, termkey_key *key)
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csi_end++;
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}
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if(csi_end >= tk->buffvalid) {
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key->code = TERMKEY_SYM_NONE;
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return key->code;
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}
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if(csi_end >= tk->buffvalid)
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return TERMKEY_RES_NONE;
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unsigned char cmd = tk->buffer[csi_end];
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int arg1 = -1;
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@ -85,7 +83,7 @@ static int getkey_csi(termkey_t *tk, size_t introlen, termkey_key *key)
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}
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}
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key->code = TERMKEY_SYM_UNKNOWN;
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eatbytes(tk, csi_end + 1);
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switch(cmd) {
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case 'A': key->code = TERMKEY_SYM_UP; break;
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@ -118,31 +116,29 @@ static int getkey_csi(termkey_t *tk, size_t introlen, termkey_key *key)
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default:
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fprintf(stderr, "CSI function key %d\n", arg1);
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key->code = TERMKEY_SYM_UNKNOWN;
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}
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break;
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default:
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fprintf(stderr, "CSI arg1=%d arg2=%d cmd=%c\n", arg1, arg2, cmd);
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key->code = TERMKEY_SYM_UNKNOWN;
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}
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key->modifiers = arg2 == -1 ? 0 : arg2 - 1;
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key->flags = TERMKEY_KEYFLAG_SPECIAL;
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eatbytes(tk, csi_end + 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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static int getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *key)
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static termkey_result getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *key)
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{
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if(introlen + 1 < tk->buffvalid) {
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key->code = TERMKEY_SYM_NONE;
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return key->code;
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}
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if(introlen + 1 < tk->buffvalid)
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return TERMKEY_RES_NONE;
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unsigned char cmd = tk->buffer[introlen];
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key->code = TERMKEY_SYM_UNKNOWN;
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eatbytes(tk, introlen + 1);
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switch(cmd) {
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case 'A': key->code = TERMKEY_SYM_UP; break;
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@ -176,7 +172,7 @@ static int getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *key)
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default:
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fprintf(stderr, "SS3 %c (0x%02x)\n", cmd, cmd);
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break;
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key->code = TERMKEY_SYM_UNKNOWN;
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}
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key->modifiers = 0;
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@ -216,17 +212,13 @@ static int getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *key)
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}
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}
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eatbytes(tk, introlen + 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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int termkey_getkey(termkey_t *tk, termkey_key *key)
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termkey_result termkey_getkey(termkey_t *tk, termkey_key *key)
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{
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if(tk->buffvalid == 0) {
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key->code = tk->is_closed ? TERMKEY_SYM_EOF : TERMKEY_SYM_NONE;
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return key->code;
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}
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if(tk->buffvalid == 0)
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return tk->is_closed ? TERMKEY_RES_EOF : TERMKEY_RES_NONE;
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// Now we're sure at least 1 byte is valid
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unsigned char b0 = tk->buffer[0];
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@ -239,7 +231,7 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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eatbytes(tk, 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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unsigned char b1 = tk->buffer[1];
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@ -251,19 +243,26 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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tk->buffer++;
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int metakey = termkey_getkey(tk, key);
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if(metakey != TERMKEY_SYM_NONE) {
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key->modifiers |= TERMKEY_KEYMOD_ALT;
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tk->buffer--;
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eatbytes(tk, 1);
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termkey_result metakey_result = termkey_getkey(tk, key);
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switch(metakey_result) {
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case TERMKEY_RES_KEY:
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key->modifiers |= TERMKEY_KEYMOD_ALT;
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tk->buffer--;
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eatbytes(tk, 1);
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break;
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case TERMKEY_RES_NONE:
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case TERMKEY_RES_EOF:
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break;
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}
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return key->code;
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return metakey_result;
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}
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else if(b0 < 0x20) {
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// Control key
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key->code = TERMKEY_SYM_UNKNOWN;
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key->code = 0;
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if(!(tk->flags & TERMKEY_FLAG_NOINTERPRET)) {
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// Try to interpret C0 codes that have nice names
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@ -274,7 +273,7 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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}
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}
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if(key->code == TERMKEY_SYM_UNKNOWN) {
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if(!key->code) {
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key->code = b0 + 0x40;
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key->modifiers = TERMKEY_KEYMOD_CTRL;
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key->flags = 0;
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@ -289,7 +288,7 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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eatbytes(tk, 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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else if(b0 == 0x20 && !(tk->flags & TERMKEY_FLAG_NOINTERPRET)) {
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key->code = TERMKEY_SYM_SPACE;
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@ -298,7 +297,7 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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eatbytes(tk, 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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else if(b0 == 0x7f && !(tk->flags & TERMKEY_FLAG_NOINTERPRET)) {
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key->code = TERMKEY_SYM_DEL;
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@ -307,7 +306,7 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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eatbytes(tk, 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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else if(b0 >= 0x20 && b0 < 0x80) {
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// ASCII lowbyte range
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@ -320,17 +319,17 @@ int termkey_getkey(termkey_t *tk, termkey_key *key)
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eatbytes(tk, 1);
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return key->code;
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return TERMKEY_RES_KEY;
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}
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fprintf(stderr, "TODO - tk->buffer[0] == 0x%02x\n", tk->buffer[0]);
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return TERMKEY_SYM_NONE;
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}
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int termkey_waitkey(termkey_t *tk, termkey_key *key)
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termkey_result termkey_waitkey(termkey_t *tk, termkey_key *key)
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{
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int ret;
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while((ret = termkey_getkey(tk, key)) == TERMKEY_SYM_NONE) {
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termkey_result ret;
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while((ret = termkey_getkey(tk, key)) == TERMKEY_RES_NONE) {
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termkey_advisereadable(tk);
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}
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@ -362,7 +361,7 @@ void termkey_advisereadable(termkey_t *tk)
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// Must be kept synchronised with enum termkey_sym_e in termkey.h
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const char *keynames[] = {
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"None",
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"NONE",
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// Special names in C0
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"Backspace",
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@ -425,10 +424,7 @@ const char *keynames[] = {
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const char *termkey_describe_sym(int code)
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{
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if(code == -1)
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return "EOF";
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if(code == -2)
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if(code == TERMKEY_SYM_UNKNOWN)
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return "UNKNOWN";
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if(code < sizeof(keynames)/sizeof(keynames[0]))
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17
termkey.h
17
termkey.h
@ -5,9 +5,8 @@
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#include <stdlib.h>
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typedef enum {
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TERMKEY_SYM_EOF = -1, // Stream closed
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TERMKEY_SYM_UNKNOWN = -2,
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TERMKEY_SYM_NONE = 0, // Did not find a key
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TERMKEY_SYM_UNKNOWN = -1,
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TERMKEY_SYM_NONE = 0,
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// Special names in C0
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TERMKEY_SYM_BACKSPACE,
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@ -68,7 +67,13 @@ typedef enum {
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TERMKEY_SYM_KPEQUALS,
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// et cetera ad nauseum
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} termkey_sym_e;
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} termkey_sym;
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typedef enum {
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TERMKEY_RES_NONE,
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TERMKEY_RES_KEY,
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TERMKEY_RES_EOF,
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} termkey_result;
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enum {
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TERMKEY_KEYFLAG_SPECIAL = 0x01, // 'code' is a special keycode, not a unicode codepoint
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@ -100,8 +105,8 @@ enum {
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termkey_t *termkey_new(int fd, int flags);
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void termkey_free(termkey_t *tk);
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int termkey_getkey(termkey_t *tk, termkey_key *key);
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int termkey_waitkey(termkey_t *tk, termkey_key *key);
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termkey_result termkey_getkey(termkey_t *tk, termkey_key *key);
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termkey_result termkey_waitkey(termkey_t *tk, termkey_key *key);
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void termkey_pushinput(termkey_t *tk, unsigned char *input, size_t inputlen);
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