support REP (repeat) escape sequence
The sequence \e[Nb prints the last printed char N (more) times if it's printable, and it's ignored after newline or other control chars. This is Ecma-048/ANSI-X3.6 sequence and not DEC VT. It's supported by xterm, and ncurses uses it when possible, e.g. when TERM is xterm* (and with this commit also st*). xterm supports only codepoints<=255, possibly due to internal limits. We support any value/codepoint which was placed in a cell. To test: - tput rep 65 4 -> prints 'AAAA' - printf "\342\225\246\033[4b" -> prints U+2566 1+4 times.
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parent
f8afebdfa0
commit
e8392b282c
10
st.c
10
st.c
@ -129,6 +129,7 @@ typedef struct {
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int charset; /* current charset */
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int icharset; /* selected charset for sequence */
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int *tabs;
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Rune lastc; /* last printed char outside of sequence, 0 if control */
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} Term;
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/* CSI Escape sequence structs */
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@ -1648,6 +1649,12 @@ csihandle(void)
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if (csiescseq.arg[0] == 0)
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ttywrite(vtiden, strlen(vtiden), 0);
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break;
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case 'b': /* REP -- if last char is printable print it <n> more times */
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DEFAULT(csiescseq.arg[0], 1);
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if (term.lastc)
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while (csiescseq.arg[0]-- > 0)
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tputc(term.lastc);
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break;
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case 'C': /* CUF -- Cursor <n> Forward */
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case 'a': /* HPR -- Cursor <n> Forward */
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DEFAULT(csiescseq.arg[0], 1);
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@ -2373,6 +2380,8 @@ check_control_code:
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/*
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* control codes are not shown ever
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*/
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if (!term.esc)
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term.lastc = 0;
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return;
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} else if (term.esc & ESC_START) {
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if (term.esc & ESC_CSI) {
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@ -2422,6 +2431,7 @@ check_control_code:
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}
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tsetchar(u, &term.c.attr, term.c.x, term.c.y);
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term.lastc = u;
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if (width == 2) {
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gp->mode |= ATTR_WIDE;
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