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https://github.com/tmux/tmux.git
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Simplify next key matching and fix problems with meta and Unicode keys.
This commit is contained in:
nicm
parent
fb1c929dc6
commit
d3546cc85c
187
tty-keys.c
187
tty-keys.c
@ -33,14 +33,17 @@
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* into a ternary tree.
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*/
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void tty_keys_add1(struct tty_key **, const char *, key_code);
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void tty_keys_add(struct tty *, const char *, key_code);
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void tty_keys_free1(struct tty_key *);
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struct tty_key *tty_keys_find1(struct tty_key *, const char *, size_t,
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static void tty_keys_add1(struct tty_key **, const char *, key_code);
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static void tty_keys_add(struct tty *, const char *, key_code);
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static void tty_keys_free1(struct tty_key *);
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static struct tty_key *tty_keys_find1(struct tty_key *, const char *, size_t,
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size_t *);
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struct tty_key *tty_keys_find(struct tty *, const char *, size_t, size_t *);
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void tty_keys_callback(int, short, void *);
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int tty_keys_mouse(struct tty *, const char *, size_t, size_t *);
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static struct tty_key *tty_keys_find(struct tty *, const char *, size_t,
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size_t *);
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static int tty_keys_next1(struct tty *, const char *, size_t, key_code *,
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size_t *);
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static void tty_keys_callback(int, short, void *);
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static int tty_keys_mouse(struct tty *, const char *, size_t, size_t *);
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/* Default raw keys. */
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struct tty_default_key_raw {
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@ -316,7 +319,7 @@ const struct tty_default_key_code tty_default_code_keys[] = {
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};
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/* Add key to tree. */
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void
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static void
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tty_keys_add(struct tty *tty, const char *s, key_code key)
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{
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struct tty_key *tk;
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@ -334,7 +337,7 @@ tty_keys_add(struct tty *tty, const char *s, key_code key)
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}
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/* Add next node to the tree. */
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void
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static void
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tty_keys_add1(struct tty_key **tkp, const char *s, key_code key)
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{
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struct tty_key *tk;
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@ -409,7 +412,7 @@ tty_keys_free(struct tty *tty)
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}
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/* Free a single key. */
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void
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static void
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tty_keys_free1(struct tty_key *tk)
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{
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if (tk->next != NULL)
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@ -422,7 +425,7 @@ tty_keys_free1(struct tty_key *tk)
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}
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/* Lookup a key in the tree. */
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struct tty_key *
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static struct tty_key *
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tty_keys_find(struct tty *tty, const char *buf, size_t len, size_t *size)
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{
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*size = 0;
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@ -430,7 +433,7 @@ tty_keys_find(struct tty *tty, const char *buf, size_t len, size_t *size)
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}
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/* Find the next node. */
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struct tty_key *
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static struct tty_key *
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tty_keys_find1(struct tty_key *tk, const char *buf, size_t len, size_t *size)
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{
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/* If the node is NULL, this is the end of the tree. No match. */
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@ -460,6 +463,56 @@ tty_keys_find1(struct tty_key *tk, const char *buf, size_t len, size_t *size)
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return (tty_keys_find1(tk, buf, len, size));
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}
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/* Look up part of the next key. */
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static int
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tty_keys_next1(struct tty *tty, const char *buf, size_t len, key_code *key,
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size_t *size)
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{
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struct tty_key *tk, *tk1;
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struct utf8_data ud;
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enum utf8_state more;
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u_int i;
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wchar_t wc;
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log_debug("next key is %zu (%.*s)", len, (int)len, buf);
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/* Empty buffer is a partial key. */
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if (len == 0)
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return (1);
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/* Is this a known key? */
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tk = tty_keys_find(tty, buf, len, size);
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if (tk != NULL) {
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tk1 = tk;
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do
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log_debug("keys in list: %#llx", tk->key);
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while ((tk1 = tk1->next) != NULL);
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*key = tk->key;
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return (tk->next != NULL);
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}
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/* Is this valid UTF-8? */
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more = utf8_open(&ud, (u_char)*buf);
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if (more == UTF8_MORE) {
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*size = ud.size;
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if (len < ud.size)
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return (1);
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for (i = 1; i < ud.size; i++)
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more = utf8_append(&ud, (u_char)buf[i]);
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if (more != UTF8_DONE)
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return (0);
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if (utf8_combine(&ud, &wc) != UTF8_DONE)
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return (0);
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*key = wc;
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log_debug("UTF-8 key %.*s %#llx", (int)ud.size, buf, *key);
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return (0);
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}
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return (-1);
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}
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/*
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* Process at least one key in the buffer and invoke tty->key_callback. Return
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* 0 if there are no further keys, or 1 if there could be more in the buffer.
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@ -467,17 +520,12 @@ tty_keys_find1(struct tty_key *tk, const char *buf, size_t len, size_t *size)
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key_code
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tty_keys_next(struct tty *tty)
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{
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struct tty_key *tk;
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struct timeval tv;
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const char *buf;
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size_t len, size;
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cc_t bspace;
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int delay, expired = 0;
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key_code key;
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struct utf8_data ud;
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enum utf8_state more;
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u_int i;
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wchar_t wc;
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struct timeval tv;
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const char *buf;
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size_t len, size;
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cc_t bspace;
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int delay, expired = 0;
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key_code key;
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/* Get key buffer. */
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buf = EVBUFFER_DATA(tty->event->input);
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@ -485,7 +533,7 @@ tty_keys_next(struct tty *tty)
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if (len == 0)
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return (0);
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log_debug("keys are %zu (%.*s)", len, (int) len, buf);
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log_debug("keys are %zu (%.*s)", len, (int)len, buf);
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/* Is this a mouse key press? */
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switch (tty_keys_mouse(tty, buf, len, &size)) {
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@ -501,68 +549,65 @@ tty_keys_next(struct tty *tty)
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goto partial_key;
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}
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/* Look for matching key string and return if found. */
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tk = tty_keys_find(tty, buf, len, &size);
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if (tk != NULL) {
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if (tk->next != NULL)
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first_key:
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/* If escape is at the start, try without it. */
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if (*buf == '\033') {
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switch (tty_keys_next1 (tty, buf + 1, len - 1, &key, &size)) {
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case 0: /* found */
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if (key != KEYC_UNKNOWN)
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key |= KEYC_ESCAPE;
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size++; /* include escape */
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goto complete_key;
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case -1: /* not found */
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break;
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case 1:
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if (expired)
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goto complete_key;
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goto partial_key;
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key = tk->key;
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goto complete_key;
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}
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}
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/* Try to parse a key with an xterm-style modifier. */
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/* Try with the escape. */
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switch (tty_keys_next1 (tty, buf, len, &key, &size)) {
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case 0: /* found */
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goto complete_key;
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case -1: /* not found */
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break;
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case 1:
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if (expired)
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goto complete_key;
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goto partial_key;
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}
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/* Is this an an xterm(1) key? */
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switch (xterm_keys_find(buf, len, &size, &key)) {
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case 0: /* found */
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goto complete_key;
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case -1: /* not found */
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break;
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case 1:
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if (expired)
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break;
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goto partial_key;
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}
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first_key:
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/* Is this a meta key? */
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if (len >= 2 && buf[0] == '\033') {
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if (buf[1] != '\033') {
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key = buf[1] | KEYC_ESCAPE;
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/*
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* If this starts with escape and is at least two keys, it must be
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* complete even if the timer has not expired, because otherwise
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* tty_keys_next1 would have found a partial key. If just an escape
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* alone, it needs to wait for the timer first.
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*/
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if (*buf == '\033') {
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if (len >= 2) {
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key = (u_char)buf[1] | KEYC_ESCAPE;
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size = 2;
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goto complete_key;
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}
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tk = tty_keys_find(tty, buf + 1, len - 1, &size);
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if (tk != NULL && (!expired || tk->next == NULL)) {
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size++; /* include escape */
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if (tk->next != NULL)
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goto partial_key;
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key = tk->key;
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if (key != KEYC_UNKNOWN)
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key |= KEYC_ESCAPE;
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goto complete_key;
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}
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}
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/* Is this valid UTF-8? */
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if ((more = utf8_open(&ud, (u_char)*buf) == UTF8_MORE)) {
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size = ud.size;
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if (len < size) {
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if (expired)
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goto discard_key;
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if (!expired)
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goto partial_key;
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}
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for (i = 1; i < size; i++)
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more = utf8_append(&ud, (u_char)buf[i]);
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if (more != UTF8_DONE)
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goto discard_key;
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if (utf8_combine(&ud, &wc) != UTF8_DONE)
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goto discard_key;
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key = wc;
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log_debug("UTF-8 key %.*s %#llx", (int)size, buf, key);
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goto complete_key;
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}
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/* No key found, take first. */
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/* No longer key found, use the first character. */
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key = (u_char)*buf;
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size = 1;
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@ -578,7 +623,7 @@ first_key:
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goto complete_key;
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partial_key:
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log_debug("partial key %.*s", (int) len, buf);
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log_debug("partial key %.*s", (int)len, buf);
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/* If timer is going, check for expiration. */
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if (tty->flags & TTY_TIMER) {
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@ -640,7 +685,7 @@ discard_key:
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}
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/* Key timer callback. */
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void
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static void
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tty_keys_callback(__unused int fd, __unused short events, void *data)
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{
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struct tty *tty = data;
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@ -655,7 +700,7 @@ tty_keys_callback(__unused int fd, __unused short events, void *data)
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* Handle mouse key input. Returns 0 for success, -1 for failure, 1 for partial
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* (probably a mouse sequence but need more data).
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*/
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int
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static int
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tty_keys_mouse(struct tty *tty, const char *buf, size_t len, size_t *size)
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{
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struct mouse_event *m = &tty->mouse;
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