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-rw-r--r--st.c160
1 files changed, 87 insertions, 73 deletions
diff --git a/st.c b/st.c
index ba6973a..23ed213 100644
--- a/st.c
+++ b/st.c
@@ -1784,56 +1784,80 @@ tputtab(bool forward) {
void
tputc(char *c, int len) {
uchar ascii = *c;
+ bool control = ascii < '\x20' || ascii == 0177;
if(iofd != -1)
write(iofd, c, len);
-
- switch(ascii) {
- case '\t': /* HT */
- tputtab(1);
- return;
- case '\b': /* BS */
- tmoveto(term.c.x-1, term.c.y);
- return;
- case '\r': /* CR */
- tmoveto(0, term.c.y);
- return;
- case '\f': /* LF */
- case '\v': /* VT */
- case '\n': /* LF */
- /* go to first col if the mode is set */
- tnewline(IS_SET(MODE_CRLF));
- return;
- case '\a': /* BEL */
- if(term.esc & ESC_STR)
+ /*
+ * STR sequences must be checked before of anything
+ * because it can use some control codes as part of the sequence
+ */
+ if(term.esc & ESC_STR) {
+ switch(ascii) {
+ case '\033':
+ term.esc = ESC_START | ESC_STR_END;
break;
- if(!(xw.state & WIN_FOCUSED))
- xseturgency(1);
- return;
- case '\033': /* ESC */
- csireset();
- term.esc = ESC_START;
- return;
- case '\016': /* SO */
- term.c.attr.mode |= ATTR_GFX;
- break;
- case '\017': /* SI */
- term.c.attr.mode &= ~ATTR_GFX;
- return;
- case '\032': /* SUB */
- case '\030': /* CAN */
- csireset();
+ case '\a': /* backwards compatibility to xterm */
+ term.esc = 0;
+ strhandle();
+ break;
+ default:
+ strescseq.buf[strescseq.len++] = ascii;
+ if(strescseq.len+1 >= STR_BUF_SIZ) {
+ term.esc = 0;
+ strhandle();
+ }
+ }
return;
- default:
- /* case '\005': ENQ (IGNORED) */
- /* case '\000': NUL (IGNORED) */
- /* case '\021': XON (IGNORED) */
- /* case '\023': XOFF (IGNORED) */
- /* case 0177: DEL (IGNORED) */
- break;
}
-
- if(term.esc & ESC_START) {
+ /*
+ * Actions of control codes must be performed as soon they arrive
+ * because they can be embedded inside a control sequence, and
+ * they must not cause conflicts with sequences.
+ */
+ if(control) {
+ switch(ascii) {
+ case '\t': /* HT */
+ tputtab(1);
+ return;
+ case '\b': /* BS */
+ tmoveto(term.c.x-1, term.c.y);
+ return;
+ case '\r': /* CR */
+ tmoveto(0, term.c.y);
+ return;
+ case '\f': /* LF */
+ case '\v': /* VT */
+ case '\n': /* LF */
+ /* go to first col if the mode is set */
+ tnewline(IS_SET(MODE_CRLF));
+ return;
+ case '\a': /* BEL */
+ if(!(xw.state & WIN_FOCUSED))
+ xseturgency(1);
+ return;
+ case '\033': /* ESC */
+ csireset();
+ term.esc = ESC_START;
+ return;
+ case '\016': /* SO */
+ term.c.attr.mode |= ATTR_GFX;
+ return;
+ case '\017': /* SI */
+ term.c.attr.mode &= ~ATTR_GFX;
+ return;
+ case '\032': /* SUB */
+ case '\030': /* CAN */
+ csireset();
+ return;
+ case '\005': /* ENQ (IGNORED) */
+ case '\000': /* NUL (IGNORED) */
+ case '\021': /* XON (IGNORED) */
+ case '\023': /* XOFF (IGNORED) */
+ case 0177: /* DEL (IGNORED) */
+ return;
+ }
+ } else if(term.esc & ESC_START) {
if(term.esc & ESC_CSI) {
csiescseq.buf[csiescseq.len++] = ascii;
if(BETWEEN(ascii, 0x40, 0x7E)
@@ -1841,22 +1865,6 @@ tputc(char *c, int len) {
term.esc = 0;
csiparse(), csihandle();
}
- } else if(term.esc & ESC_STR) {
- switch(ascii) {
- case '\033':
- term.esc = ESC_START | ESC_STR_END;
- break;
- case '\a': /* backwards compatibility to xterm */
- term.esc = 0;
- strhandle();
- break;
- default:
- strescseq.buf[strescseq.len++] = ascii;
- if(strescseq.len+1 >= STR_BUF_SIZ) {
- term.esc = 0;
- strhandle();
- }
- }
} else if(term.esc & ESC_STR_END) {
term.esc = 0;
if(ascii == '\\')
@@ -1955,20 +1963,26 @@ tputc(char *c, int len) {
term.esc = 0;
}
}
- } else {
- if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
- sel.bx = -1;
- if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
- if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
- tnewline(1); /* always go to first col */
- tsetchar(c);
- if(term.c.x+1 < term.col) {
- tmoveto(term.c.x+1, term.c.y);
- } else {
- term.c.state |= CURSOR_WRAPNEXT;
- }
- }
+ /*
+ * All characters which forms part of a sequence are not
+ * printed
+ */
+ return;
}
+ /*
+ * Display control codes only if we are in graphic mode
+ */
+ if(control && !(term.c.attr.mode & ATTR_GFX))
+ return;
+ if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
+ sel.bx = -1;
+ if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+ tnewline(1); /* always go to first col */
+ tsetchar(c);
+ if(term.c.x+1 < term.col)
+ tmoveto(term.c.x+1, term.c.y);
+ else
+ term.c.state |= CURSOR_WRAPNEXT;
}
int