st

suckless terminal - with my changes
git clone https://pi.duncano.de/git/st.git
Log | Files | Refs | README | LICENSE

commit f7398434b8fa949af7bf43472caaefdd97eed0f3
parent f0e2d28732549690466df995981698173daf39c0
Author: Roberto E. Vargas Caballero <roberto.vargas@igrid-td.com>
Date:   Wed, 14 Sep 2016 08:27:32 +0200

Add parsing of DCS q sequences

These sequences are used to operate with sixels, but they are still
str sequences, so they are finished with \a, ST or with a C1 control
code. This patch also disables utf8 handling for the case of sixels.

Diffstat:
st.c | 68+++++++++++++++++++++++++++++++++++++++++++++-----------------------
1 file changed, 45 insertions(+), 23 deletions(-)

diff --git a/st.c b/st.c @@ -138,6 +138,7 @@ enum term_mode { MODE_BRCKTPASTE = 1 << 19, MODE_PRINT = 1 << 20, MODE_UTF8 = 1 << 21, + MODE_SIXEL = 1 << 22, MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\ |MODE_MOUSEMANY, }; @@ -155,11 +156,12 @@ enum charset { enum escape_state { ESC_START = 1, ESC_CSI = 2, - ESC_STR = 4, /* DCS, OSC, PM, APC */ + ESC_STR = 4, /* OSC, PM, APC */ ESC_ALTCHARSET = 8, ESC_STR_END = 16, /* a final string was encountered */ ESC_TEST = 32, /* Enter in test mode */ ESC_UTF8 = 64, + ESC_DCS =128, }; enum window_state { @@ -1485,7 +1487,7 @@ ttyread(void) ptr = buf; for (;;) { - if (IS_SET(MODE_UTF8)) { + if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) { /* process a complete utf8 char */ charsize = utf8decode(ptr, &unicodep, buflen); if (charsize == 0) @@ -1578,7 +1580,7 @@ ttysend(char *s, size_t n) lim = &s[n]; for (t = s; t < lim; t += len) { - if (IS_SET(MODE_UTF8)) { + if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) { len = utf8decode(t, &u, n); } else { u = *t & 0xFF; @@ -2548,6 +2550,7 @@ strhandle(void) xsettitle(strescseq.args[0]); return; case 'P': /* DCS -- Device Control String */ + term.mode |= ESC_DCS; case '_': /* APC -- Application Program Command */ case '^': /* PM -- Privacy Message */ return; @@ -2754,9 +2757,12 @@ tdectest(char c) void tstrsequence(uchar c) { + strreset(); + switch (c) { case 0x90: /* DCS -- Device Control String */ c = 'P'; + term.esc |= ESC_DCS; break; case 0x9f: /* APC -- Application Program Command */ c = '_'; @@ -2768,7 +2774,6 @@ tstrsequence(uchar c) c = ']'; break; } - strreset(); strescseq.type = c; term.esc |= ESC_STR; } @@ -2968,7 +2973,7 @@ tputc(Rune u) Glyph *gp; control = ISCONTROL(u); - if (!IS_SET(MODE_UTF8)) { + if (!IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) { c[0] = u; width = len = 1; } else { @@ -2991,30 +2996,47 @@ tputc(Rune u) if (term.esc & ESC_STR) { if (u == '\a' || u == 030 || u == 032 || u == 033 || ISCONTROLC1(u)) { - term.esc &= ~(ESC_START|ESC_STR); + term.esc &= ~(ESC_START|ESC_STR|ESC_DCS); + if (IS_SET(MODE_SIXEL)) { + /* TODO: render sixel */; + term.mode &= ~MODE_SIXEL; + return; + } term.esc |= ESC_STR_END; - } else if (strescseq.len + len < sizeof(strescseq.buf) - 1) { - memmove(&strescseq.buf[strescseq.len], c, len); - strescseq.len += len; + goto check_control_code; + } + + + if (IS_SET(MODE_SIXEL)) { + /* TODO: implement sixel mode */ return; - } else { - /* - * Here is a bug in terminals. If the user never sends - * some code to stop the str or esc command, then st - * will stop responding. But this is better than - * silently failing with unknown characters. At least - * then users will report back. - * - * In the case users ever get fixed, here is the code: - */ - /* - * term.esc = 0; - * strhandle(); - */ + } + if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q') + term.mode |= MODE_SIXEL; + + if (strescseq.len+len >= sizeof(strescseq.buf)-1) { + /* + * Here is a bug in terminals. If the user never sends + * some code to stop the str or esc command, then st + * will stop responding. But this is better than + * silently failing with unknown characters. At least + * then users will report back. + * + * In the case users ever get fixed, here is the code: + */ + /* + * term.esc = 0; + * strhandle(); + */ return; } + + memmove(&strescseq.buf[strescseq.len], c, len); + strescseq.len += len; + return; } +check_control_code: /* * Actions of control codes must be performed as soon they arrive * because they can be embedded inside a control sequence, and