From 31414eac3bbc40ac10a46a2f5c49ea87b216311a Mon Sep 17 00:00:00 2001 From: Paul LeoNerd Evans Date: Sun, 10 Feb 2008 20:22:33 +0000 Subject: Implement waittime polling to try to distinguish Esc, 1 from A-1, etc.. on slow terminals --- termkey.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++------- termkey.h | 4 +++ 2 files changed, 93 insertions(+), 11 deletions(-) diff --git a/termkey.c b/termkey.c index 6f8b254..819b49f 100644 --- a/termkey.c +++ b/termkey.c @@ -1,6 +1,7 @@ #include "termkey.h" #include +#include #include #include @@ -20,6 +21,8 @@ struct termkey { size_t buffcount; // NUMBER of entires valid in buffer size_t buffsize; // Total malloc'ed size + int waittime; // msec + char is_closed; int nkeynames; @@ -37,7 +40,7 @@ struct termkey { struct keyinfo *csifuncs; }; -termkey_t *termkey_new_full(int fd, int flags, size_t buffsize) +termkey_t *termkey_new_full(int fd, int flags, size_t buffsize, int waittime) { termkey_t *tk = malloc(sizeof(*tk)); if(!tk) @@ -75,6 +78,8 @@ termkey_t *termkey_new_full(int fd, int flags, size_t buffsize) tk->buffcount = 0; tk->buffsize = buffsize; + tk->waittime = waittime; + tk->is_closed = 0; int i; @@ -168,7 +173,17 @@ termkey_t *termkey_new_full(int fd, int flags, size_t buffsize) termkey_t *termkey_new(int fd, int flags) { - return termkey_new_full(fd, flags, 256); + return termkey_new_full(fd, flags, 256, 50); +} + +void termkey_setwaittime(termkey_t *tk, int msec) +{ + tk->waittime = msec; +} + +int termkey_getwaittime(termkey_t *tk) +{ + return tk->waittime; } static inline void eatbytes(termkey_t *tk, size_t count) @@ -294,8 +309,15 @@ static termkey_result getkey_csi(termkey_t *tk, size_t introlen, termkey_key *ke csi_end++; } - if(csi_end >= tk->buffcount) - return TERMKEY_RES_NONE; + if(csi_end >= tk->buffcount) { + if(tk->waittime) + return TERMKEY_RES_AGAIN; + + do_codepoint(tk, '[', key); + key->modifiers |= TERMKEY_KEYMOD_ALT; + eatbytes(tk, introlen); + return TERMKEY_RES_KEY; + } unsigned char cmd = CHARAT(csi_end); int arg[16]; @@ -372,8 +394,15 @@ static termkey_result getkey_csi(termkey_t *tk, size_t introlen, termkey_key *ke static termkey_result getkey_ss3(termkey_t *tk, size_t introlen, termkey_key *key) { - if(introlen + 1 < tk->buffcount) - return TERMKEY_RES_NONE; + if(tk->buffcount < introlen + 1) { + if(tk->waittime) + return TERMKEY_RES_AGAIN; + + do_codepoint(tk, 'O', key); + key->modifiers |= TERMKEY_KEYMOD_ALT; + eatbytes(tk, tk->buffcount); + return TERMKEY_RES_KEY; + } unsigned char cmd = CHARAT(introlen); @@ -419,18 +448,30 @@ termkey_result termkey_getkey(termkey_t *tk, termkey_key *key) if(b0 == 0x1b) { if(tk->buffcount == 1) { + // This might be an press, or it may want to be part of a longer + // sequence + if(tk->waittime) + return TERMKEY_RES_AGAIN; + do_codepoint(tk, b0, key); eatbytes(tk, 1); return TERMKEY_RES_KEY; } unsigned char b1 = CHARAT(1); + if(b1 == '[') return getkey_csi(tk, 2, key); if(b1 == 'O') return getkey_ss3(tk, 2, key); + if(b1 == 0x1b) { + do_codepoint(tk, b0, key); + eatbytes(tk, 1); + return TERMKEY_RES_KEY; + } + tk->buffstart++; termkey_result metakey_result = termkey_getkey(tk, key); @@ -503,7 +544,7 @@ termkey_result termkey_getkey(termkey_t *tk, termkey_key *key) } if(tk->buffcount < nbytes) - return TERMKEY_RES_NONE; + return tk->waittime ? TERMKEY_RES_AGAIN : TERMKEY_RES_NONE; for(int b = 1; b < nbytes; b++) { unsigned char cb = CHARAT(b); @@ -548,14 +589,51 @@ termkey_result termkey_getkey(termkey_t *tk, termkey_key *key) return TERMKEY_SYM_NONE; } +termkey_result termkey_getkey_force(termkey_t *tk, termkey_key *key) +{ + int old_waittime = tk->waittime; + tk->waittime = 0; + + termkey_result ret = termkey_getkey(tk, key); + + tk->waittime = old_waittime; + + return ret; +} + termkey_result termkey_waitkey(termkey_t *tk, termkey_key *key) { - termkey_result ret; - while((ret = termkey_getkey(tk, key)) == TERMKEY_RES_NONE) { - termkey_advisereadable(tk); + while(1) { + termkey_result ret = termkey_getkey(tk, key); + + switch(ret) { + case TERMKEY_RES_KEY: + case TERMKEY_RES_EOF: + return ret; + + case TERMKEY_RES_NONE: + termkey_advisereadable(tk); + break; + + case TERMKEY_RES_AGAIN: + { + struct pollfd fd; + + fd.fd = tk->fd; + fd.events = POLLIN; + + int pollres = poll(&fd, 1, tk->waittime); + + if(pollres == 0) + return termkey_getkey_force(tk, key); + + termkey_advisereadable(tk); + } + break; + } } - return ret; + /* UNREACHABLE */ } void termkey_pushinput(termkey_t *tk, unsigned char *input, size_t inputlen) diff --git a/termkey.h b/termkey.h index 0cfacba..077afdc 100644 --- a/termkey.h +++ b/termkey.h @@ -110,7 +110,11 @@ enum { termkey_t *termkey_new(int fd, int flags); void termkey_free(termkey_t *tk); +void termkey_setwaittime(termkey_t *tk, int msec); +int termkey_getwaittime(termkey_t *tk); + termkey_result termkey_getkey(termkey_t *tk, termkey_key *key); +termkey_result termkey_getkey_force(termkey_t *tk, termkey_key *key); termkey_result termkey_waitkey(termkey_t *tk, termkey_key *key); void termkey_pushinput(termkey_t *tk, unsigned char *input, size_t inputlen); -- cgit v1.2.3-70-g09d2