>From http://www.vt100.net/docs/vt510-rm/chapter4:
*The VT510 ignores all following characters until it receives a
SUB, ST, or any other C1 control character.
So OSC, PM and APC sequence ends with a SUB (it cancels the sequence
and show a question mark as error), ST or any another C1 (8 bits)
code, or their C0 (7 bits) equivalent sequences (at this moment we
do not handle C1 codes, but we should). But it is also said that:
Cancel CAN
1/8 Immediately cancels an escape sequence, control sequence,
or device control string in progress. In this case, the
VT510 does not display any error character.
Escape ESC
1/11Introduces an escape sequence. ESC also cancels any escape
sequence, control sequence, or device control string in
progress.
---
st.c | 203 +--
1 file changed, 125 insertions(+), 78 deletions(-)
diff --git a/st.c b/st.c
index d2261e2..2a1e66b 100644
--- a/st.c
+++ b/st.c
@@ -390,6 +390,7 @@ static void tsetdirtattr(int);
static void tsetmode(bool, bool, int *, int);
static void tfulldirt(void);
static void techo(char *, int);
+static bool tcontrolcode(uchar );
static int32_t tdefcolor(int *, int *, int);
static void tselcs(void);
static void tdeftran(char);
@@ -399,6 +400,7 @@ static void ttyread(void);
static void ttyresize(void);
static void ttysend(char *, size_t);
static void ttywrite(const char *, size_t);
+static bool iscontrol(int c);
static void xdraws(char *, Glyph, int, int, int, int);
static void xhints(void);
@@ -2134,6 +2136,7 @@ strhandle(void) {
char *p = NULL;
int j, narg, par;
+ term.esc &= ~(ESC_STR_END|ESC_STR);
strparse();
narg = strescseq.narg;
par = atoi(strescseq.args[0]);
@@ -2293,13 +2296,22 @@ tputtab(int n) {
tmoveto(x, term.c.y);
}
+bool
+iscontrol(int c) {
+ return c < 0x20 || c == 0177 || BETWEEN(c, 0x80, 0x9f);
+}
+
void
techo(char *buf, int len) {
for(; len > 0; buf++, len--) {
char c = *buf;
- if(BETWEEN(c, 0x00, 0x1f) || c == 0x7f) { /* control code */
- if(c != '\n' && c != '\r' && c != '\t') {
+ if(iscontrol(c)) { /* control code */
+ if(c & 0x80) {
+ c &= 0x7f;
+ tputc("^", 1);
+ tputc("[", 1);
+ } else if(c != '\n' && c != '\r' && c != '\t') {
c ^= '\x40';
tputc("^", 1);
}
@@ -2338,57 +2350,135 @@ tselcs(void) {
ATTR_GFX);
}
+bool
+tcontrolcode(uchar ascii) {
+ static char question[UTF_SIZ] = "?";
+
+ switch(ascii) {
+ case '\t': /* HT */
+ tputtab(1);
+ break;
+ case '\b': /* BS */
+ tmoveto(term.c.x-1, term.c.y);
+ break;
+ case '\r': /* CR */
+ tmoveto(0, term.c.y);
+ break;
+ case '\f': /* LF */
+ case '\v': /* VT */
+ case '\n': /* LF */
+ /* go to first col if the mode is set */
+ tnewline(IS_SET(MODE_CRLF));
+ break;
+ case '\a': /* BEL */
+ if(term.esc & ESC_STR_END) {
+ /* backwards compatibility to xterm */
+ strhandle();
+ } else {
+ if(!(xw.state & WIN_FOCUSED))
+ xseturgency(1);
+ if (bellvolume)
+ XBell(xw.dpy, bellvolume);
+ }
+ break;
+ case '\033': /* ESC */
+ csireset();
+ term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
+ term.esc |= ESC_START;
+ return 1;
+ case '\016': /* SO */
+ term.charset = 0;
+ tselcs();
+ break;
+ case '\017': /* SI */
+ term.charset = 1;
+ tselcs();
+ break;
+ case '\032': /* SUB */
+ tsetchar(question, &term.c.attr, term.c.x, term.c.y);
+ case '\030': /* CAN */
+ csireset();
+ break;
+ case '\005': /* ENQ (IGNORED) */
+ case '\000': /* NUL (IGNORED) */
+ case '\021': /* XON (IGNORED) */
+ case '\023': /* XOFF (IGNORED) */
+ case 0177: /* DEL (IGNORED) */
+ case 0x84: /* TODO: IND */
+ case 0x85: /* TODO: NEL */
+ case 0x88: /* TODO: HTS */
+ case 0x8d: /* TODO: RI */
+ case 0x8e: /* TODO: SS2 */
+ case 0x8f: /* TODO: SS3 */
+ case 0x90: /* TODO: DCS */
+ case 0x98: /* TODO: SOS */
+ case 0x9a: /* TODO: DECID */
+ case 0x9b: /* TODO: CS
