mirror of https://github.com/tmux/tmux.git
Switch the tty key tree over to an (unbalanced) ternary tree which allows
partial matches to be done (they wait for further data or a timer to expire, like a naked escape). Mouse and xterm-style keys still expect to be atomic.pull/1/head
Nicholas Marriott
parent
05855393f0
commit
80e0158112
13
tmux.h
13
tmux.h
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@ -936,10 +936,13 @@ ARRAY_DECL(sessions, struct session *);
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/* TTY information. */
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struct tty_key {
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char ch;
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int key;
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char *string;
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RB_ENTRY(tty_key) entry;
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struct tty_key *left;
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struct tty_key *right;
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struct tty_key *next;
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};
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struct tty_term {
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@ -998,9 +1001,7 @@ struct tty {
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void (*key_callback)(int, struct mouse_event *, void *);
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void *key_data;
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struct event key_timer;
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size_t ksize; /* maximum key size */
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RB_HEAD(tty_keys, tty_key) ktree;
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struct tty_key *key_tree;
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};
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/* TTY command context and function pointer. */
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@ -1351,8 +1352,6 @@ int tty_term_number(struct tty_term *, enum tty_code_code);
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int tty_term_flag(struct tty_term *, enum tty_code_code);
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/* tty-keys.c */
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int tty_keys_cmp(struct tty_key *, struct tty_key *);
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RB_PROTOTYPE(tty_keys, tty_key, entry, tty_keys_cmp);
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void tty_keys_init(struct tty *);
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void tty_keys_free(struct tty *);
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int tty_keys_next(struct tty *);
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248
tty-keys.c
248
tty-keys.c
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@ -26,12 +26,19 @@
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#include "tmux.h"
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/*
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* Handle keys input from the outside terminal.
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* Handle keys input from the outside terminal. tty_keys[] is a base table of
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* supported keys which are looked up in terminfo(5) and translated into a
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* ternary tree (a binary tree of binary trees).
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*/
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void tty_keys_add(struct tty *, const char *, int);
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void tty_keys_callback(int, short, void *);
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int tty_keys_mouse(char *, size_t, size_t *, struct mouse_event *);
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void tty_keys_add1(struct tty_key **, const char *, int);
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void tty_keys_add(struct tty *, const char *, int);
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void tty_keys_free1(struct tty_key *);
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struct tty_key *tty_keys_find1(
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struct tty_key *, const char *, size_t, 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(char *, size_t, size_t *, struct mouse_event *);
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struct tty_key_ent {
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enum tty_code_code code;
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@ -43,6 +50,11 @@ struct tty_key_ent {
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#define TTYKEY_RAW 0x2
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};
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/*
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* Default key tables. Those flagged with TTYKEY_RAW are inserted directly,
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* otherwise they are looked up in terminfo(5). Any keys marked TTYKEY_CTRL
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* have their last byte twiddled and are inserted as a Ctrl key as well.
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*/
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struct tty_key_ent tty_keys[] = {
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/* Function keys. */
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{ TTYC_KF1, NULL, KEYC_F1, TTYKEY_CTRL },
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@ -186,37 +198,56 @@ struct tty_key_ent tty_keys[] = {
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{ TTYC_KUP7, NULL, KEYC_UP|KEYC_ESCAPE|KEYC_CTRL, 0 },
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};
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RB_GENERATE(tty_keys, tty_key, entry, tty_keys_cmp);
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struct tty_key *tty_keys_find(struct tty *, char *, size_t, size_t *);
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int
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tty_keys_cmp(struct tty_key *k1, struct tty_key *k2)
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{
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return (strcmp(k1->string, k2->string));
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}
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void
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tty_keys_add(struct tty *tty, const char *s, int key)
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{
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struct tty_key *tk, *tl;
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size_t size;
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tk = xmalloc(sizeof *tk);
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tk->string = xstrdup(s);
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tk->key = key;
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if ((tl = RB_INSERT(tty_keys, &tty->ktree, tk)) != NULL) {
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xfree(tk->string);
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xfree(tk);
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log_debug("key exists: %s (old %x, new %x)", s, tl->key, key);
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return;
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if (tty_keys_find(tty, s, strlen(s), &size) == NULL) {
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log_debug("new key 0x%x: %s", key, s);
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tty_keys_add1(&tty->key_tree, s, key);
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}
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if (strlen(tk->string) > tty->ksize)
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tty->ksize = strlen(tk->string);
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log_debug("new key %x: size now %zu (%s)", key, tty->ksize, tk->string);
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}
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/* Add next node to the tree. */
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void
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tty_keys_add1(struct tty_key **tkp, const char *s, int key)
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{
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struct tty_key *tk;
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/* Allocate a tree entry if there isn't one already. */
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tk = *tkp;
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if (tk == NULL) {
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tk = *tkp = xcalloc(1, sizeof *tk);
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tk->ch = *s;
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tk->key = KEYC_NONE;
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}
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/* Find the next entry. */
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if (*s == tk->ch) {
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/* Move forward in string. */
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s++;
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/* If this is the end of the string, no more is necessary. */
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if (*s == '\0') {
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tk->key = key;
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return;
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}
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/* Use the child tree for the next character. */
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tkp = &tk->next;
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} else {
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if (*s < tk->ch)
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tkp = &tk->left;
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else if (*s > tk->ch)
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tkp = &tk->right;
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}
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/* And recurse to add it. */
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tty_keys_add1(tkp, s, key);
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}
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/* Initialise a key tree from the table. */
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void
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tty_keys_init(struct tty *tty)
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{
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@ -225,9 +256,7 @@ tty_keys_init(struct tty *tty)
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const char *s;
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char tmp[64];
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RB_INIT(&tty->ktree);
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tty->ksize = 0;
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tty->key_tree = NULL;
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for (i = 0; i < nitems(tty_keys); i++) {
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tke = &tty_keys[i];
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@ -237,12 +266,12 @@ tty_keys_init(struct tty *tty)
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if (!tty_term_has(tty->term, tke->code))
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continue;
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s = tty_term_string(tty->term, tke->code);
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if (s[0] != '\033' || s[1] == '\0')
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continue;
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}
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if (s[0] != '\033' || s[1] == '\0')
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continue;
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tty_keys_add(tty, s + 1, tke->key);
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if (tke->flags & TTYKEY_CTRL) {
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if (!(tke->flags & TTYKEY_CTRL)) {
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if (strlcpy(tmp, s, sizeof tmp) >= sizeof tmp)
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continue;
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tmp[strlen(tmp) - 1] ^= 0x20;
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@ -251,61 +280,80 @@ tty_keys_init(struct tty *tty)
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}
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}
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/* Free the entire key tree. */
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void
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tty_keys_free(struct tty *tty)
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{
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struct tty_key *tk;
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while (!RB_EMPTY(&tty->ktree)) {
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tk = RB_ROOT(&tty->ktree);
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RB_REMOVE(tty_keys, &tty->ktree, tk);
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xfree(tk->string);
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xfree(tk);
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}
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tty_keys_free1(tty->key_tree);
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}
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struct tty_key *
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tty_keys_find(struct tty *tty, char *buf, size_t len, size_t *size)
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/* Free a single key. */
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void
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tty_keys_free1(struct tty_key *tk)
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{
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struct tty_key *tk, tl;
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char *s;
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if (tk->next != NULL)
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tty_keys_free1(tk->next);
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if (tk->left != NULL)
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tty_keys_free1(tk->left);
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if (tk->right != NULL)
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tty_keys_free1(tk->right);
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xfree(tk);
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}
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if (len == 0)
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/* Lookup a key in the tree. */
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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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return (tty_keys_find1(tty->key_tree, buf, len, size));
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}
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/* Find the next node. */
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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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if (tk == NULL)
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return (NULL);
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s = xmalloc(tty->ksize + 1);
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for (*size = tty->ksize; (*size) > 0; (*size)--) {
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if ((*size) > len)
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continue;
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memcpy(s, buf, *size);
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s[*size] = '\0';
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/* Pick the next in the sequence. */
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if (tk->ch == *buf) {
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/* Move forward in the string. */
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buf++; len--;
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(*size)++;
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log_debug2("looking for key: %s", s);
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tl.string = s;
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tk = RB_FIND(tty_keys, &tty->ktree, &tl);
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if (tk != NULL) {
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log_debug2("got key: 0x%x", tk->key);
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xfree(s);
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/* At the end of the string, return the current node. */
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if (len == 0)
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return (tk);
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}
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}
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xfree(s);
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return (NULL);
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/* Move into the next tree for the following character. */
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tk = tk->next;
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} else {
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if (*buf < tk->ch)
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tk = tk->left;
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else if (*buf > tk->ch)
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tk = tk->right;
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}
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/* Move to the next in the tree. */
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return (tty_keys_find1(tk, buf, len, size));
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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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* 1 if there are no further keys, or 0 if there is more in the buffer.
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*/
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int
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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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struct mouse_event mouse;
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char *buf;
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char *buf, *ptr;
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size_t len, size;
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cc_t bspace;
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int key;
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u_char ch;
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buf = EVBUFFER_DATA(tty->event->input);
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len = EVBUFFER_LENGTH(tty->event->input);
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@ -315,8 +363,8 @@ tty_keys_next(struct tty *tty)
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/* If a normal key, return it. */
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if (*buf != '\033') {
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bufferevent_read(tty->event, &ch, 1);
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key = ch;
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key = *buf;
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evbuffer_drain(tty->event->input, 1);
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/*
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* Check for backspace key using termios VERASE - the terminfo
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@ -326,29 +374,28 @@ tty_keys_next(struct tty *tty)
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bspace = tty->tio.c_cc[VERASE];
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if (bspace != _POSIX_VDISABLE && key == bspace)
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key = KEYC_BSPACE;
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goto found;
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goto handle_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 + 1, len - 1, &size);
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if (tk != NULL) {
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evbuffer_drain(tty->event->input, size + 1);
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key = tk->key;
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goto found;
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goto found_key;
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}
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/* Not found. Is this a mouse key press? */
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key = tty_keys_mouse(buf, len, &size, &mouse);
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if (key != KEYC_NONE) {
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evbuffer_drain(tty->event->input, size);
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goto found;
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goto handle_key;
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}
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/* Not found. Try to parse a key with an xterm-style modifier. */
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key = xterm_keys_find(buf, len, &size);
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if (key != KEYC_NONE) {
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evbuffer_drain(tty->event->input, size);
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goto found;
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goto handle_key;
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}
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/* Skip the escape. */
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@ -357,32 +404,37 @@ tty_keys_next(struct tty *tty)
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/* Is there a normal key following? */
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if (len != 0 && *buf != '\033') {
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evbuffer_drain(tty->event->input, 1);
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bufferevent_read(tty->event, &ch, 1);
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key = ch | KEYC_ESCAPE;
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goto found;
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key = *buf | KEYC_ESCAPE;
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evbuffer_drain(tty->event->input, 2);
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goto handle_key;
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}
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/* Or a key string? */
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if (len > 1) {
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tk = tty_keys_find(tty, buf + 1, len - 1, &size);
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if (tk != NULL) {
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evbuffer_drain(tty->event->input, size + 2);
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key = tk->key | KEYC_ESCAPE;
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goto found;
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size++; /* include escape */
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goto found_key;
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}
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}
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/* Escape and then nothing useful - fall through. */
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partial_key:
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/*
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* Escape but no key string. If have, already seen an escape, then the
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* Escape but no key string. If have already seen an escape, then the
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* timer must have expired, so give up waiting and send the escape.
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*/
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if (tty->flags & TTY_ESCAPE) {
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evbuffer_drain(tty->event->input, 1);
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key = '\033';
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goto found;
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goto handle_key;
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}
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/* Fall through to start the timer. */
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start_timer:
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/* Start the timer and wait for expiry or more data. */
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tv.tv_sec = 0;
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tv.tv_usec = ESCAPE_PERIOD * 1000L;
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@ -394,22 +446,45 @@ tty_keys_next(struct tty *tty)
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tty->flags |= TTY_ESCAPE;
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return (0);
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found:
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evtimer_del(&tty->key_timer);
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found_key:
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if (tk->next != NULL) {
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/* Partial key. Start the timer if not already expired. */
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if (!(tty->flags & TTY_ESCAPE))
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goto start_timer;
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/* Otherwise, if no key, send the escape alone. */
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if (tk->key == KEYC_NONE)
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goto partial_key;
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/* Or fall through to send the partial key found. */
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}
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evbuffer_drain(tty->event->input, size + 1);
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goto handle_key;
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handle_key:
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evtimer_del(&tty->key_timer);
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tty->key_callback(key, &mouse, tty->key_data);
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tty->flags &= ~TTY_ESCAPE;
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return (1);
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}
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/* Key timer callback. */
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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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if (tty->flags & TTY_ESCAPE)
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tty_keys_next(tty);
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if (!(tty->flags & TTY_ESCAPE))
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return;
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while (tty_keys_next(tty))
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;
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}
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/* Handle mouse key input. */
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int
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tty_keys_mouse(char *buf, size_t len, size_t *size, struct mouse_event *m)
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{
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|
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@ -418,11 +493,12 @@ tty_keys_mouse(char *buf, size_t len, size_t *size, struct mouse_event *m)
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* buttons, X and Y, all based at 32 with 1,1 top-left.
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*/
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log_debug("mouse input is: %.*s", (int) len, buf);
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if (len != 6 || memcmp(buf, "\033[M", 3) != 0)
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return (KEYC_NONE);
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*size = 6;
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log_debug("mouse input is: %.*s", (int) len, buf);
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m->b = buf[3];
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m->x = buf[4];
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m->y = buf[5];
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