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send DA following XTSMGRAPHICS #1469

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nick black 2021-06-06 07:46:38 -04:00 committed by Nick Black
parent 60c030e232
commit b432166f66
1 changed files with 28 additions and 7 deletions
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35
src/lib/termdesc.c
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@ -364,22 +364,34 @@ err:
// FIXME need unit tests on this
// FIXME can read a character not intended for it
// we'll get a trailing Device Attributes response, because we write
// XTSMGRAPHICS followed by a DA query, in case the former isn't supported
// (we'd otherwise hang looking for input).
static int
read_xtsmgraphics_reply(int fd, int* val2){
char in;
// return is of the form CSI ? Pi ; 0 ; Pv S
// return is of the form CSI ? Pi ; Ps ; Pv S
// Pi: 1 color registers, 2 sixel, 3 regis
// Pa: 1 read, 2 reset, 3 set to Pv, 4 read maximum
// Pv: n for color registers, width;height for geometry
// Ps: 0 success, 1 bad Pi, 2 bad Pa, 3 failure
enum {
WANT_CSI,
WANT_QMARK,
WANT_PI,
WANT_SEMI1,
WANT_SEMI2,
WANT_PV1,
WANT_PV2,
DONE
DONE,
} state = WANT_CSI;
int pv = 0;
int pi = 0;
while(read(fd, &in, 1) == 1){
//fprintf(stderr, "READ: %c 0x%02x\n", in, in);
if(in == 'c'){ // should match the end of DA
break;
}
switch(state){
case WANT_CSI:
if(in == NCKEY_ESC){
@ -388,6 +400,16 @@ read_xtsmgraphics_reply(int fd, int* val2){
break;
case WANT_QMARK:
if(in == '?'){
state = WANT_PI;
}
break;
case WANT_PI:
if(!isdigit(in)){
break;
}
pi *= 10;
pi += in - '0';
if(pi >= 1 && pi <= 3){
state = WANT_SEMI1;
}
break;
@ -424,11 +446,10 @@ read_xtsmgraphics_reply(int fd, int* val2){
default:
break;
}
if(state == DONE){
if(pv >= 0 && (!val2 || *val2 >= 0)){
return pv;
}
break;
}
if(state == DONE){
if(pv >= 0 && (!val2 || *val2 >= 0)){
return pv;
}
}
return -1;