diff --git a/FAQ b/FAQ deleted file mode 100644 index 6287a27..0000000 --- a/FAQ +++ /dev/null @@ -1,253 +0,0 @@ -## Why does st not handle utmp entries? - -Use the excellent tool of [utmp](https://git.suckless.org/utmp/) for this task. - - -## Some _random program_ complains that st is unknown/not recognised/unsupported/whatever! - -It means that st doesn’t have any terminfo entry on your system. Chances are -you did not `make install`. If you just want to test it without installing it, -you can manually run `tic -sx st.info`. - - -## Nothing works, and nothing is said about an unknown terminal! - -* Some programs just assume they’re running in xterm i.e. they don’t rely on - terminfo. What you see is the current state of the “xterm compliance”. -* Some programs don’t complain about the lacking st description and default to - another terminal. In that case see the question about terminfo. - - -## How do I scroll back up? - -* Using a terminal multiplexer. - * `st -e tmux` using C-b [ - * `st -e screen` using C-a ESC -* Using the excellent tool of [scroll](https://git.suckless.org/scroll/). -* Using the scrollback [patch](https://st.suckless.org/patches/scrollback/). - - -## I would like to have utmp and/or scroll functionality by default - -You can add the absolute path of both programs in your config.h file. You only -have to modify the value of utmp and scroll variables. - - -## Why doesn't the Del key work in some programs? - -Taken from the terminfo manpage: - - If the terminal has a keypad that transmits codes when the keys - are pressed, this information can be given. Note that it is not - possible to handle terminals where the keypad only works in - local (this applies, for example, to the unshifted HP 2621 keys). - If the keypad can be set to transmit or not transmit, give these - codes as smkx and rmkx. Otherwise the keypad is assumed to - always transmit. - -In the st case smkx=E[?1hE= and rmkx=E[?1lE>, so it is mandatory that -applications which want to test against keypad keys send these -sequences. - -But buggy applications (like bash and irssi, for example) don't do this. A fast -solution for them is to use the following command: - - $ printf '\033[?1h\033=' >/dev/tty - -or - $ tput smkx - -In the case of bash, readline is used. Readline has a different note in its -manpage about this issue: - - enable-keypad (Off) - When set to On, readline will try to enable the - application keypad when it is called. Some systems - need this to enable arrow keys. - -Adding this option to your .inputrc will fix the keypad problem for all -applications using readline. - -If you are using zsh, then read the zsh FAQ -: - - It should be noted that the O / [ confusion can occur with other keys - such as Home and End. Some systems let you query the key sequences - sent by these keys from the system's terminal database, terminfo. - Unfortunately, the key sequences given there typically apply to the - mode that is not the one zsh uses by default (it's the "application" - mode rather than the "raw" mode). Explaining the use of terminfo is - outside of the scope of this FAQ, but if you wish to use the key - sequences given there you can tell the line editor to turn on - "application" mode when it starts and turn it off when it stops: - - function zle-line-init () { echoti smkx } - function zle-line-finish () { echoti rmkx } - zle -N zle-line-init - zle -N zle-line-finish - -Putting these lines into your .zshrc will fix the problems. - - -## How can I use meta in 8bit mode? - -St supports meta in 8bit mode, but the default terminfo entry doesn't -use this capability. If you want it, you have to use the 'st-meta' value -in TERM. - - -## I cannot compile st in OpenBSD - -OpenBSD lacks librt, despite it being mandatory in POSIX -. -If you want to compile st for OpenBSD you have to remove -lrt from config.mk, and -st will compile without any loss of functionality, because all the functions are -included in libc on this platform. - - -## The Backspace Case - -St is emulating the Linux way of handling backspace being delete and delete being -backspace. - -This is an issue that was discussed in suckless mailing list -. Here is why some old grumpy -terminal users wants its backspace to be how he feels it: - - Well, I am going to comment why I want to change the behaviour - of this key. When ASCII was defined in 1968, communication - with computers was done using punched cards, or hardcopy - terminals (basically a typewriter machine connected with the - computer using a serial port). ASCII defines DELETE as 7F, - because, in punched-card terms, it means all the holes of the - card punched; it is thus a kind of 'physical delete'. In the - same way, the BACKSPACE key was a non-destructive backspace, - as on a typewriter. So, if you wanted to delete a character, - you had to BACKSPACE and then DELETE. Another use of BACKSPACE - was to type accented characters, for example 'a BACKSPACE `'. - The VT100 had no BACKSPACE key; it was generated using the - CONTROL key as another control character (CONTROL key sets to - 0 b7 b6 b5, so it converts H (code 0x48) into BACKSPACE (code - 0x08)), but it had a DELETE key in a similar position where - the BACKSPACE key is located today on common PC keyboards. - All the terminal emulators emulated the difference between - these keys correctly: the backspace key generated a BACKSPACE - (^H) and delete key generated a DELETE (^?). - - But a problem arose when Linus Torvalds wrote Linux. Unlike - earlier terminals, the Linux virtual terminal (the terminal - emulator integrated in the kernel) returned a DELETE when - backspace was pressed, due to the VT100 having a DELETE key in - the same position. This created a lot of problems (see [1] - and [2]). Since Linux has become the king, a lot of terminal - emulators today generate a DELETE when the backspace key is - pressed in order to avoid problems with Linux. The result is - that the only way of generating a BACKSPACE on these systems - is by using CONTROL + H. (I also think that emacs had an - important point here because the CONTROL + H prefix is used - in emacs in some commands (help commands).) - - From point of view of the kernel, you can change the key - for deleting a previous character with stty erase. When you - connect a real terminal into a machine you describe the type - of terminal, so getty configures the correct value of stty - erase for this terminal. In the case of terminal emulators, - however, you don't have any getty that can set the correct - value of stty erase, so you always get the default value. - For this reason, it is necessary to add 'stty erase ^H' to your - profile if you have changed the value of the backspace key. - Of course, another solution is for st itself to modify the - value of stty erase. I usually have the inverse problem: - when I connect to non-Unix machines, I have to press CONTROL + - h to get a BACKSPACE. The inverse problem occurs when a user - connects to my Unix machines from a different system with a - correct backspace key. - - [1] http://www.ibb.net/~anne/keyboard.html - [2] http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-5.html - - -## But I really want the old grumpy behaviour of my terminal - -Apply [1]. - -[1] https://st.suckless.org/patches/delkey - - -## Why do images not work in st using the w3m image hack? - -w3mimg uses a hack that draws an image on top of the terminal emulator Drawable -window. The hack relies on the terminal to use a single buffer to draw its -contents directly. - -st uses double-buffered drawing so the image is quickly replaced and may show a -short flicker effect. - -Below is a patch example to change st double-buffering to a single Drawable -buffer. - -diff --git a/x.c b/x.c ---- a/x.c -+++ b/x.c -@@ -732,10 +732,6 @@ xresize(int col, int row) - win.tw = col * win.cw; - win.th = row * win.ch; - -- XFreePixmap(xw.dpy, xw.buf); -- xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, -- DefaultDepth(xw.dpy, xw.scr)); -- XftDrawChange(xw.draw, xw.buf); - xclear(0, 0, win.w, win.h); - - /* resize to new width */ -@@ -1148,8 +1144,7 @@ xinit(int cols, int rows) - gcvalues.graphics_exposures = False; - dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures, - &gcvalues); -- xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, -- DefaultDepth(xw.dpy, xw.scr)); -+ xw.buf = xw.win; - XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel); - XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h); - -@@ -1632,8 +1627,6 @@ xdrawline(Line line, int x1, int y1, int x2) - void - xfinishdraw(void) - { -- XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w, -- win.h, 0, 0); - XSetForeground(xw.dpy, dc.gc, - dc.col[IS_SET(MODE_REVERSE)? - defaultfg : defaultbg].pixel); - - -## BadLength X error in Xft when trying to render emoji - -Xft makes st crash when rendering color emojis with the following error: - -"X Error of failed request: BadLength (poly request too large or internal Xlib length error)" - Major opcode of failed request: 139 (RENDER) - Minor opcode of failed request: 20 (RenderAddGlyphs) - Serial number of failed request: 1595 - Current serial number in output stream: 1818" - -This is a known bug in Xft (not st) which happens on some platforms and -combination of particular fonts and fontconfig settings. - -See also: -https://gitlab.freedesktop.org/xorg/lib/libxft/issues/6 -https://bugs.freedesktop.org/show_bug.cgi?id=107534 -https://bugzilla.redhat.com/show_bug.cgi?id=1498269 - -The solution is to remove color emoji fonts or disable this in the fontconfig -XML configuration. As an ugly workaround (which may work only on newer -fontconfig versions (FC_COLOR)), the following code can be used to mask color -fonts: - - FcPatternAddBool(fcpattern, FC_COLOR, FcFalse); - -Please don't bother reporting this bug to st, but notify the upstream Xft -developers about fixing this bug. - -As of 2022-09-05 this now seems to be finally fixed in libXft 2.3.5: -https://gitlab.freedesktop.org/xorg/lib/libxft/-/blob/libXft-2.3.5/NEWS diff --git a/LEGACY b/LEGACY deleted file mode 100644 index bf28b1e..0000000 --- a/LEGACY +++ /dev/null @@ -1,17 +0,0 @@ -A STATEMENT ON LEGACY SUPPORT - -In the terminal world there is much cruft that comes from old and unsup‐ -ported terminals that inherit incompatible modes and escape sequences -which noone is able to know, except when he/she comes from that time and -developed a graphical vt100 emulator at that time. - -One goal of st is to only support what is really needed. When you en‐ -counter a sequence which you really need, implement it. But while you -are at it, do not add the other cruft you might encounter while sneek‐ -ing at other terminal emulators. History has bloated them and there is -no real evidence that most of the sequences are used today. - - -Christoph Lohmann <20h@r-36.net> -2012-09-13T07:00:36.081271045+02:00 - diff --git a/TODO b/TODO deleted file mode 100644 index 5f74cd5..0000000 --- a/TODO +++ /dev/null @@ -1,28 +0,0 @@ -vt emulation ------------- - -* double-height support - -code & interface ----------------- - -* add a simple way to do multiplexing - -drawing -------- -* add diacritics support to xdraws() - * switch to a suckless font drawing library -* make the font cache simpler -* add better support for brightening of the upper colors - -bugs ----- - -* fix shift up/down (shift selection in emacs) -* remove DEC test sequence when appropriate - -misc ----- - - $ grep -nE 'XXX|TODO' st.c - diff --git a/st b/st deleted file mode 100755 index 7c3b572..0000000 Binary files a/st and /dev/null differ diff --git a/st-scrollback-0.8.4.diff b/st-scrollback-0.8.4.diff deleted file mode 100644 index 88e0c79..0000000 --- a/st-scrollback-0.8.4.diff +++ /dev/null @@ -1,351 +0,0 @@ -diff --git a/config.def.h b/config.def.h -index 6f05dce..93cbcc0 100644 ---- a/config.def.h -+++ b/config.def.h -@@ -199,6 +199,8 @@ static Shortcut shortcuts[] = { - { TERMMOD, XK_Y, selpaste, {.i = 0} }, - { ShiftMask, XK_Insert, selpaste, {.i = 0} }, - { TERMMOD, XK_Num_Lock, numlock, {.i = 0} }, -+ { ShiftMask, XK_Page_Up, kscrollup, {.i = -1} }, -+ { ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} }, - }; - - /* -diff --git a/st.c b/st.c -index 76b7e0d..edec064 100644 ---- a/st.c -+++ b/st.c -@@ -35,6 +35,7 @@ - #define ESC_ARG_SIZ 16 - #define STR_BUF_SIZ ESC_BUF_SIZ - #define STR_ARG_SIZ ESC_ARG_SIZ -+#define HISTSIZE 2000 - - /* macros */ - #define IS_SET(flag) ((term.mode & (flag)) != 0) -@@ -42,6 +43,9 @@ - #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f)) - #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c)) - #define ISDELIM(u) (u && wcschr(worddelimiters, u)) -+#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \ -+ term.scr + HISTSIZE + 1) % HISTSIZE] : \ -+ term.line[(y) - term.scr]) - - enum term_mode { - MODE_WRAP = 1 << 0, -@@ -115,6 +119,9 @@ typedef struct { - int col; /* nb col */ - Line *line; /* screen */ - Line *alt; /* alternate screen */ -+ Line hist[HISTSIZE]; /* history buffer */ -+ int histi; /* history index */ -+ int scr; /* scroll back */ - int *dirty; /* dirtyness of lines */ - TCursor c; /* cursor */ - int ocx; /* old cursor col */ -@@ -184,8 +191,8 @@ static void tnewline(int); - static void tputtab(int); - static void tputc(Rune); - static void treset(void); --static void tscrollup(int, int); --static void tscrolldown(int, int); -+static void tscrollup(int, int, int); -+static void tscrolldown(int, int, int); - static void tsetattr(int *, int); - static void tsetchar(Rune, Glyph *, int, int); - static void tsetdirt(int, int); -@@ -414,10 +421,10 @@ tlinelen(int y) - { - int i = term.col; - -- if (term.line[y][i - 1].mode & ATTR_WRAP) -+ if (TLINE(y)[i - 1].mode & ATTR_WRAP) - return i; - -- while (i > 0 && term.line[y][i - 1].u == ' ') -+ while (i > 0 && TLINE(y)[i - 1].u == ' ') - --i; - - return i; -@@ -526,7 +533,7 @@ selsnap(int *x, int *y, int direction) - * Snap around if the word wraps around at the end or - * beginning of a line. - */ -- prevgp = &term.line[*y][*x]; -+ prevgp = &TLINE(*y)[*x]; - prevdelim = ISDELIM(prevgp->u); - for (;;) { - newx = *x + direction; -@@ -541,14 +548,14 @@ selsnap(int *x, int *y, int direction) - yt = *y, xt = *x; - else - yt = newy, xt = newx; -- if (!(term.line[yt][xt].mode & ATTR_WRAP)) -+ if (!(TLINE(yt)[xt].mode & ATTR_WRAP)) - break; - } - - if (newx >= tlinelen(newy)) - break; - -- gp = &term.line[newy][newx]; -+ gp = &TLINE(newy)[newx]; - delim = ISDELIM(gp->u); - if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim - || (delim && gp->u != prevgp->u))) -@@ -569,14 +576,14 @@ selsnap(int *x, int *y, int direction) - *x = (direction < 0) ? 0 : term.col - 1; - if (direction < 0) { - for (; *y > 0; *y += direction) { -- if (!(term.line[*y-1][term.col-1].mode -+ if (!(TLINE(*y-1)[term.col-1].mode - & ATTR_WRAP)) { - break; - } - } - } else if (direction > 0) { - for (; *y < term.row-1; *y += direction) { -- if (!(term.line[*y][term.col-1].mode -+ if (!(TLINE(*y)[term.col-1].mode - & ATTR_WRAP)) { - break; - } -@@ -607,13 +614,13 @@ getsel(void) - } - - if (sel.type == SEL_RECTANGULAR) { -- gp = &term.line[y][sel.nb.x]; -+ gp = &TLINE(y)[sel.nb.x]; - lastx = sel.ne.x; - } else { -- gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0]; -+ gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0]; - lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1; - } -- last = &term.line[y][MIN(lastx, linelen-1)]; -+ last = &TLINE(y)[MIN(lastx, linelen-1)]; - while (last >= gp && last->u == ' ') - --last; - -@@ -848,6 +855,9 @@ void - ttywrite(const char *s, size_t n, int may_echo) - { - const char *next; -+ Arg arg = (Arg) { .i = term.scr }; -+ -+ kscrolldown(&arg); - - if (may_echo && IS_SET(MODE_ECHO)) - twrite(s, n, 1); -@@ -1059,13 +1069,53 @@ tswapscreen(void) - } - - void --tscrolldown(int orig, int n) -+kscrolldown(const Arg* a) -+{ -+ int n = a->i; -+ -+ if (n < 0) -+ n = term.row + n; -+ -+ if (n > term.scr) -+ n = term.scr; -+ -+ if (term.scr > 0) { -+ term.scr -= n; -+ selscroll(0, -n); -+ tfulldirt(); -+ } -+} -+ -+void -+kscrollup(const Arg* a) -+{ -+ int n = a->i; -+ -+ if (n < 0) -+ n = term.row + n; -+ -+ if (term.scr <= HISTSIZE-n) { -+ term.scr += n; -+ selscroll(0, n); -+ tfulldirt(); -+ } -+} -+ -+void -+tscrolldown(int orig, int n, int copyhist) - { - int i; - Line temp; - - LIMIT(n, 0, term.bot-orig+1); - -+ if (copyhist) { -+ term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE; -+ temp = term.hist[term.histi]; -+ term.hist[term.histi] = term.line[term.bot]; -+ term.line[term.bot] = temp; -+ } -+ - tsetdirt(orig, term.bot-n); - tclearregion(0, term.bot-n+1, term.col-1, term.bot); - -@@ -1075,17 +1125,28 @@ tscrolldown(int orig, int n) - term.line[i-n] = temp; - } - -- selscroll(orig, n); -+ if (term.scr == 0) -+ selscroll(orig, n); - } - - void --tscrollup(int orig, int n) -+tscrollup(int orig, int n, int copyhist) - { - int i; - Line temp; - - LIMIT(n, 0, term.bot-orig+1); - -+ if (copyhist) { -+ term.histi = (term.histi + 1) % HISTSIZE; -+ temp = term.hist[term.histi]; -+ term.hist[term.histi] = term.line[orig]; -+ term.line[orig] = temp; -+ } -+ -+ if (term.scr > 0 && term.scr < HISTSIZE) -+ term.scr = MIN(term.scr + n, HISTSIZE-1); -+ - tclearregion(0, orig, term.col-1, orig+n-1); - tsetdirt(orig+n, term.bot); - -@@ -1095,7 +1156,8 @@ tscrollup(int orig, int n) - term.line[i+n] = temp; - } - -- selscroll(orig, -n); -+ if (term.scr == 0) -+ selscroll(orig, -n); - } - - void -@@ -1124,7 +1186,7 @@ tnewline(int first_col) - int y = term.c.y; - - if (y == term.bot) { -- tscrollup(term.top, 1); -+ tscrollup(term.top, 1, 1); - } else { - y++; - } -@@ -1289,14 +1351,14 @@ void - tinsertblankline(int n) - { - if (BETWEEN(term.c.y, term.top, term.bot)) -- tscrolldown(term.c.y, n); -+ tscrolldown(term.c.y, n, 0); - } - - void - tdeleteline(int n) - { - if (BETWEEN(term.c.y, term.top, term.bot)) -- tscrollup(term.c.y, n); -+ tscrollup(term.c.y, n, 0); - } - - int32_t -@@ -1733,11 +1795,11 @@ csihandle(void) - break; - case 'S': /* SU -- Scroll line up */ - DEFAULT(csiescseq.arg[0], 1); -- tscrollup(term.top, csiescseq.arg[0]); -+ tscrollup(term.top, csiescseq.arg[0], 0); - break; - case 'T': /* SD -- Scroll line down */ - DEFAULT(csiescseq.arg[0], 1); -- tscrolldown(term.top, csiescseq.arg[0]); -+ tscrolldown(term.top, csiescseq.arg[0], 0); - break; - case 'L': /* IL -- Insert blank lines */ - DEFAULT(csiescseq.arg[0], 1); -@@ -2241,7 +2303,7 @@ eschandle(uchar ascii) - return 0; - case 'D': /* IND -- Linefeed */ - if (term.c.y == term.bot) { -- tscrollup(term.top, 1); -+ tscrollup(term.top, 1, 1); - } else { - tmoveto(term.c.x, term.c.y+1); - } -@@ -2254,7 +2316,7 @@ eschandle(uchar ascii) - break; - case 'M': /* RI -- Reverse index */ - if (term.c.y == term.top) { -- tscrolldown(term.top, 1); -+ tscrolldown(term.top, 1, 1); - } else { - tmoveto(term.c.x, term.c.y-1); - } -@@ -2464,7 +2526,7 @@ twrite(const char *buf, int buflen, int show_ctrl) - void - tresize(int col, int row) - { -- int i; -+ int i, j; - int minrow = MIN(row, term.row); - int mincol = MIN(col, term.col); - int *bp; -@@ -2501,6 +2563,14 @@ tresize(int col, int row) - term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); - term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); - -+ for (i = 0; i < HISTSIZE; i++) { -+ term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph)); -+ for (j = mincol; j < col; j++) { -+ term.hist[i][j] = term.c.attr; -+ term.hist[i][j].u = ' '; -+ } -+ } -+ - /* resize each row to new width, zero-pad if needed */ - for (i = 0; i < minrow; i++) { - term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); -@@ -2559,7 +2629,7 @@ drawregion(int x1, int y1, int x2, int y2) - continue; - - term.dirty[y] = 0; -- xdrawline(term.line[y], x1, y, x2); -+ xdrawline(TLINE(y), x1, y, x2); - } - } - -@@ -2580,8 +2650,9 @@ draw(void) - cx--; - - drawregion(0, 0, term.col, term.row); -- xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], -- term.ocx, term.ocy, term.line[term.ocy][term.ocx]); -+ if (term.scr == 0) -+ xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], -+ term.ocx, term.ocy, term.line[term.ocy][term.ocx]); - term.ocx = cx; - term.ocy = term.c.y; - xfinishdraw(); -diff --git a/st.h b/st.h -index 3d351b6..f44e1d3 100644 ---- a/st.h -+++ b/st.h -@@ -81,6 +81,8 @@ void die(const char *, ...); - void redraw(void); - void draw(void); - -+void kscrolldown(const Arg *); -+void kscrollup(const Arg *); - void printscreen(const Arg *); - void printsel(const Arg *); - void sendbreak(const Arg *); diff --git a/st.c.orig b/st.c.orig deleted file mode 100644 index 57c6e96..0000000 --- a/st.c.orig +++ /dev/null @@ -1,2678 +0,0 @@ -/* See LICENSE for license details. */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "st.h" -#include "win.h" - -#if defined(__linux) - #include -#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__) - #include -#elif defined(__FreeBSD__) || defined(__DragonFly__) - #include -#endif - -/* Arbitrary sizes */ -#define UTF_INVALID 0xFFFD -#define UTF_SIZ 4 -#define ESC_BUF_SIZ (128*UTF_SIZ) -#define ESC_ARG_SIZ 16 -#define STR_BUF_SIZ ESC_BUF_SIZ -#define STR_ARG_SIZ ESC_ARG_SIZ - -/* macros */ -#define IS_SET(flag) ((term.mode & (flag)) != 0) -#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == 0x7f) -#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f)) -#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c)) -#define ISDELIM(u) (u && wcschr(worddelimiters, u)) - -enum term_mode { - MODE_WRAP = 1 << 0, - MODE_INSERT = 1 << 1, - MODE_ALTSCREEN = 1 << 2, - MODE_CRLF = 1 << 3, - MODE_ECHO = 1 << 4, - MODE_PRINT = 1 << 5, - MODE_UTF8 = 1 << 6, -}; - -enum cursor_movement { - CURSOR_SAVE, - CURSOR_LOAD -}; - -enum cursor_state { - CURSOR_DEFAULT = 0, - CURSOR_WRAPNEXT = 1, - CURSOR_ORIGIN = 2 -}; - -enum charset { - CS_GRAPHIC0, - CS_GRAPHIC1, - CS_UK, - CS_USA, - CS_MULTI, - CS_GER, - CS_FIN -}; - -enum escape_state { - ESC_START = 1, - ESC_CSI = 2, - ESC_STR = 4, /* DCS, 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, -}; - -typedef struct { - Glyph attr; /* current char attributes */ - int x; - int y; - char state; -} TCursor; - -typedef struct { - int mode; - int type; - int snap; - /* - * Selection variables: - * nb – normalized coordinates of the beginning of the selection - * ne – normalized coordinates of the end of the selection - * ob – original coordinates of the beginning of the selection - * oe – original coordinates of the end of the selection - */ - struct { - int x, y; - } nb, ne, ob, oe; - - int alt; -} Selection; - -/* Internal representation of the screen */ -typedef struct { - int row; /* nb row */ - int col; /* nb col */ - Line *line; /* screen */ - Line *alt; /* alternate screen */ - int *dirty; /* dirtyness of lines */ - TCursor c; /* cursor */ - int ocx; /* old cursor col */ - int ocy; /* old cursor row */ - int top; /* top scroll limit */ - int bot; /* bottom scroll limit */ - int mode; /* terminal mode flags */ - int esc; /* escape state flags */ - char trantbl[4]; /* charset table translation */ - int charset; /* current charset */ - int icharset; /* selected charset for sequence */ - int *tabs; - Rune lastc; /* last printed char outside of sequence, 0 if control */ -} Term; - -/* CSI Escape sequence structs */ -/* ESC '[' [[ [] [;]] []] */ -typedef struct { - char buf[ESC_BUF_SIZ]; /* raw string */ - size_t len; /* raw string length */ - char priv; - int arg[ESC_ARG_SIZ]; - int narg; /* nb of args */ - char mode[2]; -} CSIEscape; - -/* STR Escape sequence structs */ -/* ESC type [[ [] [;]] ] ESC '\' */ -typedef struct { - char type; /* ESC type ... */ - char *buf; /* allocated raw string */ - size_t siz; /* allocation size */ - size_t len; /* raw string length */ - char *args[STR_ARG_SIZ]; - int narg; /* nb of args */ -} STREscape; - -static void execsh(char *, char **); -static void stty(char **); -static void sigchld(int); -static void ttywriteraw(const char *, size_t); - -static void csidump(void); -static void csihandle(void); -static void csiparse(void); -static void csireset(void); -static void osc_color_response(int, int, int); -static int eschandle(uchar); -static void strdump(void); -static void strhandle(void); -static void strparse(void); -static void strreset(void); - -static void tprinter(char *, size_t); -static void tdumpsel(void); -static void tdumpline(int); -static void tdump(void); -static void tclearregion(int, int, int, int); -static void tcursor(int); -static void tdeletechar(int); -static void tdeleteline(int); -static void tinsertblank(int); -static void tinsertblankline(int); -static int tlinelen(int); -static void tmoveto(int, int); -static void tmoveato(int, int); -static void tnewline(int); -static void tputtab(int); -static void tputc(Rune); -static void treset(void); -static void tscrollup(int, int); -static void tscrolldown(int, int); -static void tsetattr(const int *, int); -static void tsetchar(Rune, const Glyph *, int, int); -static void tsetdirt(int, int); -static void tsetscroll(int, int); -static void tswapscreen(void); -static void tsetmode(int, int, const int *, int); -static int twrite(const char *, int, int); -static void tfulldirt(void); -static void tcontrolcode(uchar ); -static void tdectest(char ); -static void tdefutf8(char); -static int32_t tdefcolor(const int *, int *, int); -static void tdeftran(char); -static void tstrsequence(uchar); - -static void drawregion(int, int, int, int); - -static void selnormalize(void); -static void selscroll(int, int); -static void selsnap(int *, int *, int); - -static size_t utf8decode(const char *, Rune *, size_t); -static Rune utf8decodebyte(char, size_t *); -static char utf8encodebyte(Rune, size_t); -static size_t utf8validate(Rune *, size_t); - -static char *base64dec(const char *); -static char base64dec_getc(const char **); - -static ssize_t xwrite(int, const char *, size_t); - -/* Globals */ -static Term term; -static Selection sel; -static CSIEscape csiescseq; -static STREscape strescseq; -static int iofd = 1; -static int cmdfd; -static pid_t pid; - -static const uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0}; -static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8}; -static const Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000}; -static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF}; - -ssize_t -xwrite(int fd, const char *s, size_t len) -{ - size_t aux = len; - ssize_t r; - - while (len > 0) { - r = write(fd, s, len); - if (r < 0) - return r; - len -= r; - s += r; - } - - return aux; -} - -void * -xmalloc(size_t len) -{ - void *p; - - if (!(p = malloc(len))) - die("malloc: %s\n", strerror(errno)); - - return p; -} - -void * -xrealloc(void *p, size_t len) -{ - if ((p = realloc(p, len)) == NULL) - die("realloc: %s\n", strerror(errno)); - - return p; -} - -char * -xstrdup(const char *s) -{ - char *p; - - if ((p = strdup(s)) == NULL) - die("strdup: %s\n", strerror(errno)); - - return p; -} - -size_t -utf8decode(const char *c, Rune *u, size_t clen) -{ - size_t i, j, len, type; - Rune udecoded; - - *u = UTF_INVALID; - if (!clen) - return 0; - udecoded = utf8decodebyte(c[0], &len); - if (!BETWEEN(len, 1, UTF_SIZ)) - return 1; - for (i = 1, j = 1; i < clen && j < len; ++i, ++j) { - udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type); - if (type != 0) - return j; - } - if (j < len) - return 0; - *u = udecoded; - utf8validate(u, len); - - return len; -} - -Rune -utf8decodebyte(char c, size_t *i) -{ - for (*i = 0; *i < LEN(utfmask); ++(*i)) - if (((uchar)c & utfmask[*i]) == utfbyte[*i]) - return (uchar)c & ~utfmask[*i]; - - return 0; -} - -size_t -utf8encode(Rune u, char *c) -{ - size_t len, i; - - len = utf8validate(&u, 0); - if (len > UTF_SIZ) - return 0; - - for (i = len - 1; i != 0; --i) { - c[i] = utf8encodebyte(u, 0); - u >>= 6; - } - c[0] = utf8encodebyte(u, len); - - return len; -} - -char -utf8encodebyte(Rune u, size_t i) -{ - return utfbyte[i] | (u & ~utfmask[i]); -} - -size_t -utf8validate(Rune *u, size_t i) -{ - if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF)) - *u = UTF_INVALID; - for (i = 1; *u > utfmax[i]; ++i) - ; - - return i; -} - -char -base64dec_getc(const char **src) -{ - while (**src && !isprint((unsigned char)**src)) - (*src)++; - return **src ? *((*src)++) : '='; /* emulate padding if string ends */ -} - -char * -base64dec(const char *src) -{ - size_t in_len = strlen(src); - char *result, *dst; - static const char base64_digits[256] = { - [43] = 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, - 0, 0, 0, -1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, - 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, - 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, - 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 - }; - - if (in_len % 4) - in_len += 4 - (in_len % 4); - result = dst = xmalloc(in_len / 4 * 3 + 1); - while (*src) { - int a = base64_digits[(unsigned char) base64dec_getc(&src)]; - int b = base64_digits[(unsigned char) base64dec_getc(&src)]; - int c = base64_digits[(unsigned char) base64dec_getc(&src)]; - int d = base64_digits[(unsigned char) base64dec_getc(&src)]; - - /* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */ - if (a == -1 || b == -1) - break; - - *dst++ = (a << 2) | ((b & 0x30) >> 4); - if (c == -1) - break; - *dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2); - if (d == -1) - break; - *dst++ = ((c & 0x03) << 6) | d; - } - *dst = '\0'; - return result; -} - -void -selinit(void) -{ - sel.mode = SEL_IDLE; - sel.snap = 0; - sel.ob.x = -1; -} - -int -tlinelen(int y) -{ - int i = term.col; - - if (term.line[y][i - 1].mode & ATTR_WRAP) - return i; - - while (i > 0 && term.line[y][i - 1].u == ' ') - --i; - - return i; -} - -void -selstart(int col, int row, int snap) -{ - selclear(); - sel.mode = SEL_EMPTY; - sel.type = SEL_REGULAR; - sel.alt = IS_SET(MODE_ALTSCREEN); - sel.snap = snap; - sel.oe.x = sel.ob.x = col; - sel.oe.y = sel.ob.y = row; - selnormalize(); - - if (sel.snap != 0) - sel.mode = SEL_READY; - tsetdirt(sel.nb.y, sel.ne.y); -} - -void -selextend(int col, int row, int type, int done) -{ - int oldey, oldex, oldsby, oldsey, oldtype; - - if (sel.mode == SEL_IDLE) - return; - if (done && sel.mode == SEL_EMPTY) { - selclear(); - return; - } - - oldey = sel.oe.y; - oldex = sel.oe.x; - oldsby = sel.nb.y; - oldsey = sel.ne.y; - oldtype = sel.type; - - sel.oe.x = col; - sel.oe.y = row; - selnormalize(); - sel.type = type; - - if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY) - tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey)); - - sel.mode = done ? SEL_IDLE : SEL_READY; -} - -void -selnormalize(void) -{ - int i; - - if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) { - sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x; - sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x; - } else { - sel.nb.x = MIN(sel.ob.x, sel.oe.x); - sel.ne.x = MAX(sel.ob.x, sel.oe.x); - } - sel.nb.y = MIN(sel.ob.y, sel.oe.y); - sel.ne.y = MAX(sel.ob.y, sel.oe.y); - - selsnap(&sel.nb.x, &sel.nb.y, -1); - selsnap(&sel.ne.x, &sel.ne.y, +1); - - /* expand selection over line breaks */ - if (sel.type == SEL_RECTANGULAR) - return; - i = tlinelen(sel.nb.y); - if (i < sel.nb.x) - sel.nb.x = i; - if (tlinelen(sel.ne.y) <= sel.ne.x) - sel.ne.x = term.col - 1; -} - -int -selected(int x, int y) -{ - if (sel.mode == SEL_EMPTY || sel.ob.x == -1 || - sel.alt != IS_SET(MODE_ALTSCREEN)) - return 0; - - if (sel.type == SEL_RECTANGULAR) - return BETWEEN(y, sel.nb.y, sel.ne.y) - && BETWEEN(x, sel.nb.x, sel.ne.x); - - return BETWEEN(y, sel.nb.y, sel.ne.y) - && (y != sel.nb.y || x >= sel.nb.x) - && (y != sel.ne.y || x <= sel.ne.x); -} - -void -selsnap(int *x, int *y, int direction) -{ - int newx, newy, xt, yt; - int delim, prevdelim; - const Glyph *gp, *prevgp; - - switch (sel.snap) { - case SNAP_WORD: - /* - * Snap around if the word wraps around at the end or - * beginning of a line. - */ - prevgp = &term.line[*y][*x]; - prevdelim = ISDELIM(prevgp->u); - for (;;) { - newx = *x + direction; - newy = *y; - if (!BETWEEN(newx, 0, term.col - 1)) { - newy += direction; - newx = (newx + term.col) % term.col; - if (!BETWEEN(newy, 0, term.row - 1)) - break; - - if (direction > 0) - yt = *y, xt = *x; - else - yt = newy, xt = newx; - if (!(term.line[yt][xt].mode & ATTR_WRAP)) - break; - } - - if (newx >= tlinelen(newy)) - break; - - gp = &term.line[newy][newx]; - delim = ISDELIM(gp->u); - if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim - || (delim && gp->u != prevgp->u))) - break; - - *x = newx; - *y = newy; - prevgp = gp; - prevdelim = delim; - } - break; - case SNAP_LINE: - /* - * Snap around if the the previous line or the current one - * has set ATTR_WRAP at its end. Then the whole next or - * previous line will be selected. - */ - *x = (direction < 0) ? 0 : term.col - 1; - if (direction < 0) { - for (; *y > 0; *y += direction) { - if (!(term.line[*y-1][term.col-1].mode - & ATTR_WRAP)) { - break; - } - } - } else if (direction > 0) { - for (; *y < term.row-1; *y += direction) { - if (!(term.line[*y][term.col-1].mode - & ATTR_WRAP)) { - break; - } - } - } - break; - } -} - -char * -getsel(void) -{ - char *str, *ptr; - int y, bufsize, lastx, linelen; - const Glyph *gp, *last; - - if (sel.ob.x == -1) - return NULL; - - bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ; - ptr = str = xmalloc(bufsize); - - /* append every set & selected glyph to the selection */ - for (y = sel.nb.y; y <= sel.ne.y; y++) { - if ((linelen = tlinelen(y)) == 0) { - *ptr++ = '\n'; - continue; - } - - if (sel.type == SEL_RECTANGULAR) { - gp = &term.line[y][sel.nb.x]; - lastx = sel.ne.x; - } else { - gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0]; - lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1; - } - last = &term.line[y][MIN(lastx, linelen-1)]; - while (last >= gp && last->u == ' ') - --last; - - for ( ; gp <= last; ++gp) { - if (gp->mode & ATTR_WDUMMY) - continue; - - ptr += utf8encode(gp->u, ptr); - } - - /* - * Copy and pasting of line endings is inconsistent - * in the inconsistent terminal and GUI world. - * The best solution seems like to produce '\n' when - * something is copied from st and convert '\n' to - * '\r', when something to be pasted is received by - * st. - * FIXME: Fix the computer world. - */ - if ((y < sel.ne.y || lastx >= linelen) && - (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR)) - *ptr++ = '\n'; - } - *ptr = 0; - return str; -} - -void -selclear(void) -{ - if (sel.ob.x == -1) - return; - sel.mode = SEL_IDLE; - sel.ob.x = -1; - tsetdirt(sel.nb.y, sel.ne.y); -} - -void -die(const char *errstr, ...) -{ - va_list ap; - - va_start(ap, errstr); - vfprintf(stderr, errstr, ap); - va_end(ap); - exit(1); -} - -void -execsh(char *cmd, char **args) -{ - char *sh, *prog, *arg; - const struct passwd *pw; - - errno = 0; - if ((pw = getpwuid(getuid())) == NULL) { - if (errno) - die("getpwuid: %s\n", strerror(errno)); - else - die("who are you?\n"); - } - - if ((sh = getenv("SHELL")) == NULL) - sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd; - - if (args) { - prog = args[0]; - arg = NULL; - } else if (scroll) { - prog = scroll; - arg = utmp ? utmp : sh; - } else if (utmp) { - prog = utmp; - arg = NULL; - } else { - prog = sh; - arg = NULL; - } - DEFAULT(args, ((char *[]) {prog, arg, NULL})); - - unsetenv("COLUMNS"); - unsetenv("LINES"); - unsetenv("TERMCAP"); - setenv("LOGNAME", pw->pw_name, 1); - setenv("USER", pw->pw_name, 1); - setenv("SHELL", sh, 1); - setenv("HOME", pw->pw_dir, 1); - setenv("TERM", termname, 1); - - signal(SIGCHLD, SIG_DFL); - signal(SIGHUP, SIG_DFL); - signal(SIGINT, SIG_DFL); - signal(SIGQUIT, SIG_DFL); - signal(SIGTERM, SIG_DFL); - signal(SIGALRM, SIG_DFL); - - execvp(prog, args); - _exit(1); -} - -void -sigchld(int a) -{ - int stat; - pid_t p; - - if ((p = waitpid(pid, &stat, WNOHANG)) < 0) - die("waiting for pid %hd failed: %s\n", pid, strerror(errno)); - - if (pid != p) - return; - - if (WIFEXITED(stat) && WEXITSTATUS(stat)) - die("child exited with status %d\n", WEXITSTATUS(stat)); - else if (WIFSIGNALED(stat)) - die("child terminated due to signal %d\n", WTERMSIG(stat)); - _exit(0); -} - -void -stty(char **args) -{ - char cmd[_POSIX_ARG_MAX], **p, *q, *s; - size_t n, siz; - - if ((n = strlen(stty_args)) > sizeof(cmd)-1) - die("incorrect stty parameters\n"); - memcpy(cmd, stty_args, n); - q = cmd + n; - siz = sizeof(cmd) - n; - for (p = args; p && (s = *p); ++p) { - if ((n = strlen(s)) > siz-1) - die("stty parameter length too long\n"); - *q++ = ' '; - memcpy(q, s, n); - q += n; - siz -= n + 1; - } - *q = '\0'; - if (system(cmd) != 0) - perror("Couldn't call stty"); -} - -int -ttynew(const char *line, char *cmd, const char *out, char **args) -{ - int m, s; - - if (out) { - term.mode |= MODE_PRINT; - iofd = (!strcmp(out, "-")) ? - 1 : open(out, O_WRONLY | O_CREAT, 0666); - if (iofd < 0) { - fprintf(stderr, "Error opening %s:%s\n", - out, strerror(errno)); - } - } - - if (line) { - if ((cmdfd = open(line, O_RDWR)) < 0) - die("open line '%s' failed: %s\n", - line, strerror(errno)); - dup2(cmdfd, 0); - stty(args); - return cmdfd; - } - - /* seems to work fine on linux, openbsd and freebsd */ - if (openpty(&m, &s, NULL, NULL, NULL) < 0) - die("openpty failed: %s\n", strerror(errno)); - - switch (pid = fork()) { - case -1: - die("fork failed: %s\n", strerror(errno)); - break; - case 0: - close(iofd); - close(m); - setsid(); /* create a new process group */ - dup2(s, 0); - dup2(s, 1); - dup2(s, 2); - if (ioctl(s, TIOCSCTTY, NULL) < 0) - die("ioctl TIOCSCTTY failed: %s\n", strerror(errno)); - if (s > 2) - close(s); -#ifdef __OpenBSD__ - if (pledge("stdio getpw proc exec", NULL) == -1) - die("pledge\n"); -#endif - execsh(cmd, args); - break; - default: -#ifdef __OpenBSD__ - if (pledge("stdio rpath tty proc", NULL) == -1) - die("pledge\n"); -#endif - close(s); - cmdfd = m; - signal(SIGCHLD, sigchld); - break; - } - return cmdfd; -} - -size_t -ttyread(void) -{ - static char buf[BUFSIZ]; - static int buflen = 0; - int ret, written; - - /* append read bytes to unprocessed bytes */ - ret = read(cmdfd, buf+buflen, LEN(buf)-buflen); - - switch (ret) { - case 0: - exit(0); - case -1: - die("couldn't read from shell: %s\n", strerror(errno)); - default: - buflen += ret; - written = twrite(buf, buflen, 0); - buflen -= written; - /* keep any incomplete UTF-8 byte sequence for the next call */ - if (buflen > 0) - memmove(buf, buf + written, buflen); - return ret; - } -} - -void -ttywrite(const char *s, size_t n, int may_echo) -{ - const char *next; - - if (may_echo && IS_SET(MODE_ECHO)) - twrite(s, n, 1); - - if (!IS_SET(MODE_CRLF)) { - ttywriteraw(s, n); - return; - } - - /* This is similar to how the kernel handles ONLCR for ttys */ - while (n > 0) { - if (*s == '\r') { - next = s + 1; - ttywriteraw("\r\n", 2); - } else { - next = memchr(s, '\r', n); - DEFAULT(next, s + n); - ttywriteraw(s, next - s); - } - n -= next - s; - s = next; - } -} - -void -ttywriteraw(const char *s, size_t n) -{ - fd_set wfd, rfd; - ssize_t r; - size_t lim = 256; - - /* - * Remember that we are using a pty, which might be a modem line. - * Writing too much will clog the line. That's why we are doing this - * dance. - * FIXME: Migrate the world to Plan 9. - */ - while (n > 0) { - FD_ZERO(&wfd); - FD_ZERO(&rfd); - FD_SET(cmdfd, &wfd); - FD_SET(cmdfd, &rfd); - - /* Check if we can write. */ - if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) { - if (errno == EINTR) - continue; - die("select failed: %s\n", strerror(errno)); - } - if (FD_ISSET(cmdfd, &wfd)) { - /* - * Only write the bytes written by ttywrite() or the - * default of 256. This seems to be a reasonable value - * for a serial line. Bigger values might clog the I/O. - */ - if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0) - goto write_error; - if (r < n) { - /* - * We weren't able to write out everything. - * This means the buffer is getting full - * again. Empty it. - */ - if (n < lim) - lim = ttyread(); - n -= r; - s += r; - } else { - /* All bytes have been written. */ - break; - } - } - if (FD_ISSET(cmdfd, &rfd)) - lim = ttyread(); - } - return; - -write_error: - die("write error on tty: %s\n", strerror(errno)); -} - -void -ttyresize(int tw, int th) -{ - struct winsize w; - - w.ws_row = term.row; - w.ws_col = term.col; - w.ws_xpixel = tw; - w.ws_ypixel = th; - if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0) - fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno)); -} - -void -ttyhangup(void) -{ - /* Send SIGHUP to shell */ - kill(pid, SIGHUP); -} - -int -tattrset(int attr) -{ - int i, j; - - for (i = 0; i < term.row-1; i++) { - for (j = 0; j < term.col-1; j++) { - if (term.line[i][j].mode & attr) - return 1; - } - } - - return 0; -} - -void -tsetdirt(int top, int bot) -{ - int i; - - LIMIT(top, 0, term.row-1); - LIMIT(bot, 0, term.row-1); - - for (i = top; i <= bot; i++) - term.dirty[i] = 1; -} - -void -tsetdirtattr(int attr) -{ - int i, j; - - for (i = 0; i < term.row-1; i++) { - for (j = 0; j < term.col-1; j++) { - if (term.line[i][j].mode & attr) { - tsetdirt(i, i); - break; - } - } - } -} - -void -tfulldirt(void) -{ - tsetdirt(0, term.row-1); -} - -void -tcursor(int mode) -{ - static TCursor c[2]; - int alt = IS_SET(MODE_ALTSCREEN); - - if (mode == CURSOR_SAVE) { - c[alt] = term.c; - } else if (mode == CURSOR_LOAD) { - term.c = c[alt]; - tmoveto(c[alt].x, c[alt].y); - } -} - -void -treset(void) -{ - uint i; - - term.c = (TCursor){{ - .mode = ATTR_NULL, - .fg = defaultfg, - .bg = defaultbg - }, .x = 0, .y = 0, .state = CURSOR_DEFAULT}; - - memset(term.tabs, 0, term.col * sizeof(*term.tabs)); - for (i = tabspaces; i < term.col; i += tabspaces) - term.tabs[i] = 1; - term.top = 0; - term.bot = term.row - 1; - term.mode = MODE_WRAP|MODE_UTF8; - memset(term.trantbl, CS_USA, sizeof(term.trantbl)); - term.charset = 0; - - for (i = 0; i < 2; i++) { - tmoveto(0, 0); - tcursor(CURSOR_SAVE); - tclearregion(0, 0, term.col-1, term.row-1); - tswapscreen(); - } -} - -void -tnew(int col, int row) -{ - term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } }; - tresize(col, row); - treset(); -} - -void -tswapscreen(void) -{ - Line *tmp = term.line; - - term.line = term.alt; - term.alt = tmp; - term.mode ^= MODE_ALTSCREEN; - tfulldirt(); -} - -void -tscrolldown(int orig, int n) -{ - int i; - Line temp; - - LIMIT(n, 0, term.bot-orig+1); - - tsetdirt(orig, term.bot-n); - tclearregion(0, term.bot-n+1, term.col-1, term.bot); - - for (i = term.bot; i >= orig+n; i--) { - temp = term.line[i]; - term.line[i] = term.line[i-n]; - term.line[i-n] = temp; - } - - selscroll(orig, n); -} - -void -tscrollup(int orig, int n) -{ - int i; - Line temp; - - LIMIT(n, 0, term.bot-orig+1); - - tclearregion(0, orig, term.col-1, orig+n-1); - tsetdirt(orig+n, term.bot); - - for (i = orig; i <= term.bot-n; i++) { - temp = term.line[i]; - term.line[i] = term.line[i+n]; - term.line[i+n] = temp; - } - - selscroll(orig, -n); -} - -void -selscroll(int orig, int n) -{ - if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN)) - return; - - if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) { - selclear(); - } else if (BETWEEN(sel.nb.y, orig, term.bot)) { - sel.ob.y += n; - sel.oe.y += n; - if (sel.ob.y < term.top || sel.ob.y > term.bot || - sel.oe.y < term.top || sel.oe.y > term.bot) { - selclear(); - } else { - selnormalize(); - } - } -} - -void -tnewline(int first_col) -{ - int y = term.c.y; - - if (y == term.bot) { - tscrollup(term.top, 1); - } else { - y++; - } - tmoveto(first_col ? 0 : term.c.x, y); -} - -void -csiparse(void) -{ - char *p = csiescseq.buf, *np; - long int v; - int sep = ';'; /* colon or semi-colon, but not both */ - - csiescseq.narg = 0; - if (*p == '?') { - csiescseq.priv = 1; - p++; - } - - csiescseq.buf[csiescseq.len] = '\0'; - while (p < csiescseq.buf+csiescseq.len) { - np = NULL; - v = strtol(p, &np, 10); - if (np == p) - v = 0; - if (v == LONG_MAX || v == LONG_MIN) - v = -1; - csiescseq.arg[csiescseq.narg++] = v; - p = np; - if (sep == ';' && *p == ':') - sep = ':'; /* allow override to colon once */ - if (*p != sep || csiescseq.narg == ESC_ARG_SIZ) - break; - p++; - } - csiescseq.mode[0] = *p++; - csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0'; -} - -/* for absolute user moves, when decom is set */ -void -tmoveato(int x, int y) -{ - tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0)); -} - -void -tmoveto(int x, int y) -{ - int miny, maxy; - - if (term.c.state & CURSOR_ORIGIN) { - miny = term.top; - maxy = term.bot; - } else { - miny = 0; - maxy = term.row - 1; - } - term.c.state &= ~CURSOR_WRAPNEXT; - term.c.x = LIMIT(x, 0, term.col-1); - term.c.y = LIMIT(y, miny, maxy); -} - -void -tsetchar(Rune u, const Glyph *attr, int x, int y) -{ - static const char *vt100_0[62] = { /* 0x41 - 0x7e */ - "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */ - 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */ - 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */ - 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */ - "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */ - "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */ - "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */ - "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */ - }; - - /* - * The table is proudly stolen from rxvt. - */ - if (term.trantbl[term.charset] == CS_GRAPHIC0 && - BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41]) - utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ); - - if (term.line[y][x].mode & ATTR_WIDE) { - if (x+1 < term.col) { - term.line[y][x+1].u = ' '; - term.line[y][x+1].mode &= ~ATTR_WDUMMY; - } - } else if (term.line[y][x].mode & ATTR_WDUMMY) { - term.line[y][x-1].u = ' '; - term.line[y][x-1].mode &= ~ATTR_WIDE; - } - - term.dirty[y] = 1; - term.line[y][x] = *attr; - term.line[y][x].u = u; -} - -void -tclearregion(int x1, int y1, int x2, int y2) -{ - int x, y, temp; - Glyph *gp; - - if (x1 > x2) - temp = x1, x1 = x2, x2 = temp; - if (y1 > y2) - temp = y1, y1 = y2, y2 = temp; - - LIMIT(x1, 0, term.col-1); - LIMIT(x2, 0, term.col-1); - LIMIT(y1, 0, term.row-1); - LIMIT(y2, 0, term.row-1); - - for (y = y1; y <= y2; y++) { - term.dirty[y] = 1; - for (x = x1; x <= x2; x++) { - gp = &term.line[y][x]; - if (selected(x, y)) - selclear(); - gp->fg = term.c.attr.fg; - gp->bg = term.c.attr.bg; - gp->mode = 0; - gp->u = ' '; - } - } -} - -void -tdeletechar(int n) -{ - int dst, src, size; - Glyph *line; - - LIMIT(n, 0, term.col - term.c.x); - - dst = term.c.x; - src = term.c.x + n; - size = term.col - src; - line = term.line[term.c.y]; - - memmove(&line[dst], &line[src], size * sizeof(Glyph)); - tclearregion(term.col-n, term.c.y, term.col-1, term.c.y); -} - -void -tinsertblank(int n) -{ - int dst, src, size; - Glyph *line; - - LIMIT(n, 0, term.col - term.c.x); - - dst = term.c.x + n; - src = term.c.x; - size = term.col - dst; - line = term.line[term.c.y]; - - memmove(&line[dst], &line[src], size * sizeof(Glyph)); - tclearregion(src, term.c.y, dst - 1, term.c.y); -} - -void -tinsertblankline(int n) -{ - if (BETWEEN(term.c.y, term.top, term.bot)) - tscrolldown(term.c.y, n); -} - -void -tdeleteline(int n) -{ - if (BETWEEN(term.c.y, term.top, term.bot)) - tscrollup(term.c.y, n); -} - -int32_t -tdefcolor(const int *attr, int *npar, int l) -{ - int32_t idx = -1; - uint r, g, b; - - switch (attr[*npar + 1]) { - case 2: /* direct color in RGB space */ - if (*npar + 4 >= l) { - fprintf(stderr, - "erresc(38): Incorrect number of parameters (%d)\n", - *npar); - break; - } - r = attr[*npar + 2]; - g = attr[*npar + 3]; - b = attr[*npar + 4]; - *npar += 4; - if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255)) - fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n", - r, g, b); - else - idx = TRUECOLOR(r, g, b); - break; - case 5: /* indexed color */ - if (*npar + 2 >= l) { - fprintf(stderr, - "erresc(38): Incorrect number of parameters (%d)\n", - *npar); - break; - } - *npar += 2; - if (!BETWEEN(attr[*npar], 0, 255)) - fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]); - else - idx = attr[*npar]; - break; - case 0: /* implemented defined (only foreground) */ - case 1: /* transparent */ - case 3: /* direct color in CMY space */ - case 4: /* direct color in CMYK space */ - default: - fprintf(stderr, - "erresc(38): gfx attr %d unknown\n", attr[*npar]); - break; - } - - return idx; -} - -void -tsetattr(const int *attr, int l) -{ - int i; - int32_t idx; - - for (i = 0; i < l; i++) { - switch (attr[i]) { - case 0: - term.c.attr.mode &= ~( - ATTR_BOLD | - ATTR_FAINT | - ATTR_ITALIC | - ATTR_UNDERLINE | - ATTR_BLINK | - ATTR_REVERSE | - ATTR_INVISIBLE | - ATTR_STRUCK ); - term.c.attr.fg = defaultfg; - term.c.attr.bg = defaultbg; - break; - case 1: - term.c.attr.mode |= ATTR_BOLD; - break; - case 2: - term.c.attr.mode |= ATTR_FAINT; - break; - case 3: - term.c.attr.mode |= ATTR_ITALIC; - break; - case 4: - term.c.attr.mode |= ATTR_UNDERLINE; - break; - case 5: /* slow blink */ - /* FALLTHROUGH */ - case 6: /* rapid blink */ - term.c.attr.mode |= ATTR_BLINK; - break; - case 7: - term.c.attr.mode |= ATTR_REVERSE; - break; - case 8: - term.c.attr.mode |= ATTR_INVISIBLE; - break; - case 9: - term.c.attr.mode |= ATTR_STRUCK; - break; - case 22: - term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT); - break; - case 23: - term.c.attr.mode &= ~ATTR_ITALIC; - break; - case 24: - term.c.attr.mode &= ~ATTR_UNDERLINE; - break; - case 25: - term.c.attr.mode &= ~ATTR_BLINK; - break; - case 27: - term.c.attr.mode &= ~ATTR_REVERSE; - break; - case 28: - term.c.attr.mode &= ~ATTR_INVISIBLE; - break; - case 29: - term.c.attr.mode &= ~ATTR_STRUCK; - break; - case 38: - if ((idx = tdefcolor(attr, &i, l)) >= 0) - term.c.attr.fg = idx; - break; - case 39: - term.c.attr.fg = defaultfg; - break; - case 48: - if ((idx = tdefcolor(attr, &i, l)) >= 0) - term.c.attr.bg = idx; - break; - case 49: - term.c.attr.bg = defaultbg; - break; - default: - if (BETWEEN(attr[i], 30, 37)) { - term.c.attr.fg = attr[i] - 30; - } else if (BETWEEN(attr[i], 40, 47)) { - term.c.attr.bg = attr[i] - 40; - } else if (BETWEEN(attr[i], 90, 97)) { - term.c.attr.fg = attr[i] - 90 + 8; - } else if (BETWEEN(attr[i], 100, 107)) { - term.c.attr.bg = attr[i] - 100 + 8; - } else { - fprintf(stderr, - "erresc(default): gfx attr %d unknown\n", - attr[i]); - csidump(); - } - break; - } - } -} - -void -tsetscroll(int t, int b) -{ - int temp; - - LIMIT(t, 0, term.row-1); - LIMIT(b, 0, term.row-1); - if (t > b) { - temp = t; - t = b; - b = temp; - } - term.top = t; - term.bot = b; -} - -void -tsetmode(int priv, int set, const int *args, int narg) -{ - int alt; const int *lim; - - for (lim = args + narg; args < lim; ++args) { - if (priv) { - switch (*args) { - case 1: /* DECCKM -- Cursor key */ - xsetmode(set, MODE_APPCURSOR); - break; - case 5: /* DECSCNM -- Reverse video */ - xsetmode(set, MODE_REVERSE); - break; - case 6: /* DECOM -- Origin */ - MODBIT(term.c.state, set, CURSOR_ORIGIN); - tmoveato(0, 0); - break; - case 7: /* DECAWM -- Auto wrap */ - MODBIT(term.mode, set, MODE_WRAP); - break; - case 0: /* Error (IGNORED) */ - case 2: /* DECANM -- ANSI/VT52 (IGNORED) */ - case 3: /* DECCOLM -- Column (IGNORED) */ - case 4: /* DECSCLM -- Scroll (IGNORED) */ - case 8: /* DECARM -- Auto repeat (IGNORED) */ - case 18: /* DECPFF -- Printer feed (IGNORED) */ - case 19: /* DECPEX -- Printer extent (IGNORED) */ - case 42: /* DECNRCM -- National characters (IGNORED) */ - case 12: /* att610 -- Start blinking cursor (IGNORED) */ - break; - case 25: /* DECTCEM -- Text Cursor Enable Mode */ - xsetmode(!set, MODE_HIDE); - break; - case 9: /* X10 mouse compatibility mode */ - xsetpointermotion(0); - xsetmode(0, MODE_MOUSE); - xsetmode(set, MODE_MOUSEX10); - break; - case 1000: /* 1000: report button press */ - xsetpointermotion(0); - xsetmode(0, MODE_MOUSE); - xsetmode(set, MODE_MOUSEBTN); - break; - case 1002: /* 1002: report motion on button press */ - xsetpointermotion(0); - xsetmode(0, MODE_MOUSE); - xsetmode(set, MODE_MOUSEMOTION); - break; - case 1003: /* 1003: enable all mouse motions */ - xsetpointermotion(set); - xsetmode(0, MODE_MOUSE); - xsetmode(set, MODE_MOUSEMANY); - break; - case 1004: /* 1004: send focus events to tty */ - xsetmode(set, MODE_FOCUS); - break; - case 1006: /* 1006: extended reporting mode */ - xsetmode(set, MODE_MOUSESGR); - break; - case 1034: - xsetmode(set, MODE_8BIT); - break; - case 1049: /* swap screen & set/restore cursor as xterm */ - if (!allowaltscreen) - break; - tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD); - /* FALLTHROUGH */ - case 47: /* swap screen */ - case 1047: - if (!allowaltscreen) - break; - alt = IS_SET(MODE_ALTSCREEN); - if (alt) { - tclearregion(0, 0, term.col-1, - term.row-1); - } - if (set ^ alt) /* set is always 1 or 0 */ - tswapscreen(); - if (*args != 1049) - break; - /* FALLTHROUGH */ - case 1048: - tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD); - break; - case 2004: /* 2004: bracketed paste mode */ - xsetmode(set, MODE_BRCKTPASTE); - break; - /* Not implemented mouse modes. See comments there. */ - case 1001: /* mouse highlight mode; can hang the - terminal by design when implemented. */ - case 1005: /* UTF-8 mouse mode; will confuse - applications not supporting UTF-8 - and luit. */ - case 1015: /* urxvt mangled mouse mode; incompatible - and can be mistaken for other control - codes. */ - break; - default: - fprintf(stderr, - "erresc: unknown private set/reset mode %d\n", - *args); - break; - } - } else { - switch (*args) { - case 0: /* Error (IGNORED) */ - break; - case 2: - xsetmode(set, MODE_KBDLOCK); - break; - case 4: /* IRM -- Insertion-replacement */ - MODBIT(term.mode, set, MODE_INSERT); - break; - case 12: /* SRM -- Send/Receive */ - MODBIT(term.mode, !set, MODE_ECHO); - break; - case 20: /* LNM -- Linefeed/new line */ - MODBIT(term.mode, set, MODE_CRLF); - break; - default: - fprintf(stderr, - "erresc: unknown set/reset mode %d\n", - *args); - break; - } - } - } -} - -void -csihandle(void) -{ - char buf[40]; - int len; - - switch (csiescseq.mode[0]) { - default: - unknown: - fprintf(stderr, "erresc: unknown csi "); - csidump(); - /* die(""); */ - break; - case '@': /* ICH -- Insert blank char */ - DEFAULT(csiescseq.arg[0], 1); - tinsertblank(csiescseq.arg[0]); - break; - case 'A': /* CUU -- Cursor Up */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(term.c.x, term.c.y-csiescseq.arg[0]); - break; - case 'B': /* CUD -- Cursor Down */ - case 'e': /* VPR --Cursor Down */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(term.c.x, term.c.y+csiescseq.arg[0]); - break; - case 'i': /* MC -- Media Copy */ - switch (csiescseq.arg[0]) { - case 0: - tdump(); - break; - case 1: - tdumpline(term.c.y); - break; - case 2: - tdumpsel(); - break; - case 4: - term.mode &= ~MODE_PRINT; - break; - case 5: - term.mode |= MODE_PRINT; - break; - } - break; - case 'c': /* DA -- Device Attributes */ - if (csiescseq.arg[0] == 0) - ttywrite(vtiden, strlen(vtiden), 0); - break; - case 'b': /* REP -- if last char is printable print it more times */ - LIMIT(csiescseq.arg[0], 1, 65535); - if (term.lastc) - while (csiescseq.arg[0]-- > 0) - tputc(term.lastc); - break; - case 'C': /* CUF -- Cursor Forward */ - case 'a': /* HPR -- Cursor Forward */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(term.c.x+csiescseq.arg[0], term.c.y); - break; - case 'D': /* CUB -- Cursor Backward */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(term.c.x-csiescseq.arg[0], term.c.y); - break; - case 'E': /* CNL -- Cursor Down and first col */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(0, term.c.y+csiescseq.arg[0]); - break; - case 'F': /* CPL -- Cursor Up and first col */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(0, term.c.y-csiescseq.arg[0]); - break; - case 'g': /* TBC -- Tabulation clear */ - switch (csiescseq.arg[0]) { - case 0: /* clear current tab stop */ - term.tabs[term.c.x] = 0; - break; - case 3: /* clear all the tabs */ - memset(term.tabs, 0, term.col * sizeof(*term.tabs)); - break; - default: - goto unknown; - } - break; - case 'G': /* CHA -- Move to */ - case '`': /* HPA */ - DEFAULT(csiescseq.arg[0], 1); - tmoveto(csiescseq.arg[0]-1, term.c.y); - break; - case 'H': /* CUP -- Move to */ - case 'f': /* HVP */ - DEFAULT(csiescseq.arg[0], 1); - DEFAULT(csiescseq.arg[1], 1); - tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1); - break; - case 'I': /* CHT -- Cursor Forward Tabulation tab stops */ - DEFAULT(csiescseq.arg[0], 1); - tputtab(csiescseq.arg[0]); - break; - case 'J': /* ED -- Clear screen */ - switch (csiescseq.arg[0]) { - case 0: /* below */ - tclearregion(term.c.x, term.c.y, term.col-1, term.c.y); - if (term.c.y < term.row-1) { - tclearregion(0, term.c.y+1, term.col-1, - term.row-1); - } - break; - case 1: /* above */ - if (term.c.y > 1) - tclearregion(0, 0, term.col-1, term.c.y-1); - tclearregion(0, term.c.y, term.c.x, term.c.y); - break; - case 2: /* all */ - tclearregion(0, 0, term.col-1, term.row-1); - break; - default: - goto unknown; - } - break; - case 'K': /* EL -- Clear line */ - switch (csiescseq.arg[0]) { - case 0: /* right */ - tclearregion(term.c.x, term.c.y, term.col-1, - term.c.y); - break; - case 1: /* left */ - tclearregion(0, term.c.y, term.c.x, term.c.y); - break; - case 2: /* all */ - tclearregion(0, term.c.y, term.col-1, term.c.y); - break; - } - break; - case 'S': /* SU -- Scroll line up */ - if (csiescseq.priv) break; - DEFAULT(csiescseq.arg[0], 1); - tscrollup(term.top, csiescseq.arg[0]); - break; - case 'T': /* SD -- Scroll line down */ - DEFAULT(csiescseq.arg[0], 1); - tscrolldown(term.top, csiescseq.arg[0]); - break; - case 'L': /* IL -- Insert blank lines */ - DEFAULT(csiescseq.arg[0], 1); - tinsertblankline(csiescseq.arg[0]); - break; - case 'l': /* RM -- Reset Mode */ - tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg); - break; - case 'M': /* DL -- Delete lines */ - DEFAULT(csiescseq.arg[0], 1); - tdeleteline(csiescseq.arg[0]); - break; - case 'X': /* ECH -- Erase char */ - DEFAULT(csiescseq.arg[0], 1); - tclearregion(term.c.x, term.c.y, - term.c.x + csiescseq.arg[0] - 1, term.c.y); - break; - case 'P': /* DCH -- Delete char */ - DEFAULT(csiescseq.arg[0], 1); - tdeletechar(csiescseq.arg[0]); - break; - case 'Z': /* CBT -- Cursor Backward Tabulation tab stops */ - DEFAULT(csiescseq.arg[0], 1); - tputtab(-csiescseq.arg[0]); - break; - case 'd': /* VPA -- Move to */ - DEFAULT(csiescseq.arg[0], 1); - tmoveato(term.c.x, csiescseq.arg[0]-1); - break; - case 'h': /* SM -- Set terminal mode */ - tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg); - break; - case 'm': /* SGR -- Terminal attribute (color) */ - tsetattr(csiescseq.arg, csiescseq.narg); - break; - case 'n': /* DSR -- Device Status Report */ - switch (csiescseq.arg[0]) { - case 5: /* Status Report "OK" `0n` */ - ttywrite("\033[0n", sizeof("\033[0n") - 1, 0); - break; - case 6: /* Report Cursor Position (CPR) ";R" */ - len = snprintf(buf, sizeof(buf), "\033[%i;%iR", - term.c.y+1, term.c.x+1); - ttywrite(buf, len, 0); - break; - default: - goto unknown; - } - break; - case 'r': /* DECSTBM -- Set Scrolling Region */ - if (csiescseq.priv) { - goto unknown; - } else { - DEFAULT(csiescseq.arg[0], 1); - DEFAULT(csiescseq.arg[1], term.row); - tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1); - tmoveato(0, 0); - } - break; - case 's': /* DECSC -- Save cursor position (ANSI.SYS) */ - tcursor(CURSOR_SAVE); - break; - case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */ - tcursor(CURSOR_LOAD); - break; - case ' ': - switch (csiescseq.mode[1]) { - case 'q': /* DECSCUSR -- Set Cursor Style */ - if (xsetcursor(csiescseq.arg[0])) - goto unknown; - break; - default: - goto unknown; - } - break; - } -} - -void -csidump(void) -{ - size_t i; - uint c; - - fprintf(stderr, "ESC["); - for (i = 0; i < csiescseq.len; i++) { - c = csiescseq.buf[i] & 0xff; - if (isprint(c)) { - putc(c, stderr); - } else if (c == '\n') { - fprintf(stderr, "(\\n)"); - } else if (c == '\r') { - fprintf(stderr, "(\\r)"); - } else if (c == 0x1b) { - fprintf(stderr, "(\\e)"); - } else { - fprintf(stderr, "(%02x)", c); - } - } - putc('\n', stderr); -} - -void -csireset(void) -{ - memset(&csiescseq, 0, sizeof(csiescseq)); -} - -void -osc_color_response(int num, int index, int is_osc4) -{ - int n; - char buf[32]; - unsigned char r, g, b; - - if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) { - fprintf(stderr, "erresc: failed to fetch %s color %d\n", - is_osc4 ? "osc4" : "osc", - is_osc4 ? num : index); - return; - } - - n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", - is_osc4 ? "4;" : "", num, r, r, g, g, b, b); - if (n < 0 || n >= sizeof(buf)) { - fprintf(stderr, "error: %s while printing %s response\n", - n < 0 ? "snprintf failed" : "truncation occurred", - is_osc4 ? "osc4" : "osc"); - } else { - ttywrite(buf, n, 1); - } -} - -void -strhandle(void) -{ - char *p = NULL, *dec; - int j, narg, par; - const struct { int idx; char *str; } osc_table[] = { - { defaultfg, "foreground" }, - { defaultbg, "background" }, - { defaultcs, "cursor" } - }; - - term.esc &= ~(ESC_STR_END|ESC_STR); - strparse(); - par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0; - - switch (strescseq.type) { - case ']': /* OSC -- Operating System Command */ - switch (par) { - case 0: - if (narg > 1) { - xsettitle(strescseq.args[1]); - xseticontitle(strescseq.args[1]); - } - return; - case 1: - if (narg > 1) - xseticontitle(strescseq.args[1]); - return; - case 2: - if (narg > 1) - xsettitle(strescseq.args[1]); - return; - case 52: - if (narg > 2 && allowwindowops) { - dec = base64dec(strescseq.args[2]); - if (dec) { - xsetsel(dec); - xclipcopy(); - } else { - fprintf(stderr, "erresc: invalid base64\n"); - } - } - return; - case 10: - case 11: - case 12: - if (narg < 2) - break; - p = strescseq.args[1]; - if ((j = par - 10) < 0 || j >= LEN(osc_table)) - break; /* shouldn't be possible */ - - if (!strcmp(p, "?")) { - osc_color_response(par, osc_table[j].idx, 0); - } else if (xsetcolorname(osc_table[j].idx, p)) { - fprintf(stderr, "erresc: invalid %s color: %s\n", - osc_table[j].str, p); - } else { - tfulldirt(); - } - return; - case 4: /* color set */ - if (narg < 3) - break; - p = strescseq.args[2]; - /* FALLTHROUGH */ - case 104: /* color reset */ - j = (narg > 1) ? atoi(strescseq.args[1]) : -1; - - if (p && !strcmp(p, "?")) { - osc_color_response(j, 0, 1); - } else if (xsetcolorname(j, p)) { - if (par == 104 && narg <= 1) { - xloadcols(); - return; /* color reset without parameter */ - } - fprintf(stderr, "erresc: invalid color j=%d, p=%s\n", - j, p ? p : "(null)"); - } else { - /* - * TODO if defaultbg color is changed, borders - * are dirty - */ - tfulldirt(); - } - return; - } - break; - case 'k': /* old title set compatibility */ - xsettitle(strescseq.args[0]); - return; - case 'P': /* DCS -- Device Control String */ - case '_': /* APC -- Application Program Command */ - case '^': /* PM -- Privacy Message */ - return; - } - - fprintf(stderr, "erresc: unknown str "); - strdump(); -} - -void -strparse(void) -{ - int c; - char *p = strescseq.buf; - - strescseq.narg = 0; - strescseq.buf[strescseq.len] = '\0'; - - if (*p == '\0') - return; - - while (strescseq.narg < STR_ARG_SIZ) { - strescseq.args[strescseq.narg++] = p; - while ((c = *p) != ';' && c != '\0') - ++p; - if (c == '\0') - return; - *p++ = '\0'; - } -} - -void -strdump(void) -{ - size_t i; - uint c; - - fprintf(stderr, "ESC%c", strescseq.type); - for (i = 0; i < strescseq.len; i++) { - c = strescseq.buf[i] & 0xff; - if (c == '\0') { - putc('\n', stderr); - return; - } else if (isprint(c)) { - putc(c, stderr); - } else if (c == '\n') { - fprintf(stderr, "(\\n)"); - } else if (c == '\r') { - fprintf(stderr, "(\\r)"); - } else if (c == 0x1b) { - fprintf(stderr, "(\\e)"); - } else { - fprintf(stderr, "(%02x)", c); - } - } - fprintf(stderr, "ESC\\\n"); -} - -void -strreset(void) -{ - strescseq = (STREscape){ - .buf = xrealloc(strescseq.buf, STR_BUF_SIZ), - .siz = STR_BUF_SIZ, - }; -} - -void -sendbreak(const Arg *arg) -{ - if (tcsendbreak(cmdfd, 0)) - perror("Error sending break"); -} - -void -tprinter(char *s, size_t len) -{ - if (iofd != -1 && xwrite(iofd, s, len) < 0) { - perror("Error writing to output file"); - close(iofd); - iofd = -1; - } -} - -void -toggleprinter(const Arg *arg) -{ - term.mode ^= MODE_PRINT; -} - -void -printscreen(const Arg *arg) -{ - tdump(); -} - -void -printsel(const Arg *arg) -{ - tdumpsel(); -} - -void -tdumpsel(void) -{ - char *ptr; - - if ((ptr = getsel())) { - tprinter(ptr, strlen(ptr)); - free(ptr); - } -} - -void -tdumpline(int n) -{ - char buf[UTF_SIZ]; - const Glyph *bp, *end; - - bp = &term.line[n][0]; - end = &bp[MIN(tlinelen(n), term.col) - 1]; - if (bp != end || bp->u != ' ') { - for ( ; bp <= end; ++bp) - tprinter(buf, utf8encode(bp->u, buf)); - } - tprinter("\n", 1); -} - -void -tdump(void) -{ - int i; - - for (i = 0; i < term.row; ++i) - tdumpline(i); -} - -void -tputtab(int n) -{ - uint x = term.c.x; - - if (n > 0) { - while (x < term.col && n--) - for (++x; x < term.col && !term.tabs[x]; ++x) - /* nothing */ ; - } else if (n < 0) { - while (x > 0 && n++) - for (--x; x > 0 && !term.tabs[x]; --x) - /* nothing */ ; - } - term.c.x = LIMIT(x, 0, term.col-1); -} - -void -tdefutf8(char ascii) -{ - if (ascii == 'G') - term.mode |= MODE_UTF8; - else if (ascii == '@') - term.mode &= ~MODE_UTF8; -} - -void -tdeftran(char ascii) -{ - static char cs[] = "0B"; - static int vcs[] = {CS_GRAPHIC0, CS_USA}; - char *p; - - if ((p = strchr(cs, ascii)) == NULL) { - fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii); - } else { - term.trantbl[term.icharset] = vcs[p - cs]; - } -} - -void -tdectest(char c) -{ - int x, y; - - if (c == '8') { /* DEC screen alignment test. */ - for (x = 0; x < term.col; ++x) { - for (y = 0; y < term.row; ++y) - tsetchar('E', &term.c.attr, x, y); - } - } -} - -void -tstrsequence(uchar c) -{ - switch (c) { - case 0x90: /* DCS -- Device Control String */ - c = 'P'; - break; - case 0x9f: /* APC -- Application Program Command */ - c = '_'; - break; - case 0x9e: /* PM -- Privacy Message */ - c = '^'; - break; - case 0x9d: /* OSC -- Operating System Command */ - c = ']'; - break; - } - strreset(); - strescseq.type = c; - term.esc |= ESC_STR; -} - -void -tcontrolcode(uchar ascii) -{ - 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_END) { - /* backwards compatibility to xterm */ - strhandle(); - } else { - xbell(); - } - break; - case '\033': /* ESC */ - csireset(); - term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST); - term.esc |= ESC_START; - return; - case '\016': /* SO (LS1 -- Locking shift 1) */ - case '\017': /* SI (LS0 -- Locking shift 0) */ - term.charset = 1 - (ascii - '\016'); - return; - case '\032': /* SUB */ - tsetchar('?', &term.c.attr, term.c.x, term.c.y); - /* FALLTHROUGH */ - 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) */ - return; - case 0x80: /* TODO: PAD */ - case 0x81: /* TODO: HOP */ - case 0x82: /* TODO: BPH */ - case 0x83: /* TODO: NBH */ - case 0x84: /* TODO: IND */ - break; - case 0x85: /* NEL -- Next line */ - tnewline(1); /* always go to first col */ - break; - case 0x86: /* TODO: SSA */ - case 0x87: /* TODO: ESA */ - break; - case 0x88: /* HTS -- Horizontal tab stop */ - term.tabs[term.c.x] = 1; - break; - case 0x89: /* TODO: HTJ */ - case 0x8a: /* TODO: VTS */ - case 0x8b: /* TODO: PLD */ - case 0x8c: /* TODO: PLU */ - case 0x8d: /* TODO: RI */ - case 0x8e: /* TODO: SS2 */ - case 0x8f: /* TODO: SS3 */ - case 0x91: /* TODO: PU1 */ - case 0x92: /* TODO: PU2 */ - case 0x93: /* TODO: STS */ - case 0x94: /* TODO: CCH */ - case 0x95: /* TODO: MW */ - case 0x96: /* TODO: SPA */ - case 0x97: /* TODO: EPA */ - case 0x98: /* TODO: SOS */ - case 0x99: /* TODO: SGCI */ - break; - case 0x9a: /* DECID -- Identify Terminal */ - ttywrite(vtiden, strlen(vtiden), 0); - break; - case 0x9b: /* TODO: CSI */ - case 0x9c: /* TODO: ST */ - break; - case 0x90: /* DCS -- Device Control String */ - case 0x9d: /* OSC -- Operating System Command */ - case 0x9e: /* PM -- Privacy Message */ - case 0x9f: /* APC -- Application Program Command */ - tstrsequence(ascii); - return; - } - /* only CAN, SUB, \a and C1 chars interrupt a sequence */ - term.esc &= ~(ESC_STR_END|ESC_STR); -} - -/* - * returns 1 when the sequence is finished and it hasn't to read - * more characters for this sequence, otherwise 0 - */ -int -eschandle(uchar ascii) -{ - switch (ascii) { - case '[': - term.esc |= ESC_CSI; - return 0; - case '#': - term.esc |= ESC_TEST; - return 0; - case '%': - term.esc |= ESC_UTF8; - return 0; - case 'P': /* DCS -- Device Control String */ - case '_': /* APC -- Application Program Command */ - case '^': /* PM -- Privacy Message */ - case ']': /* OSC -- Operating System Command */ - case 'k': /* old title set compatibility */ - tstrsequence(ascii); - return 0; - case 'n': /* LS2 -- Locking shift 2 */ - case 'o': /* LS3 -- Locking shift 3 */ - term.charset = 2 + (ascii - 'n'); - break; - case '(': /* GZD4 -- set primary charset G0 */ - case ')': /* G1D4 -- set secondary charset G1 */ - case '*': /* G2D4 -- set tertiary charset G2 */ - case '+': /* G3D4 -- set quaternary charset G3 */ - term.icharset = ascii - '('; - term.esc |= ESC_ALTCHARSET; - return 0; - case 'D': /* IND -- Linefeed */ - if (term.c.y == term.bot) { - tscrollup(term.top, 1); - } else { - tmoveto(term.c.x, term.c.y+1); - } - break; - case 'E': /* NEL -- Next line */ - tnewline(1); /* always go to first col */ - break; - case 'H': /* HTS -- Horizontal tab stop */ - term.tabs[term.c.x] = 1; - break; - case 'M': /* RI -- Reverse index */ - if (term.c.y == term.top) { - tscrolldown(term.top, 1); - } else { - tmoveto(term.c.x, term.c.y-1); - } - break; - case 'Z': /* DECID -- Identify Terminal */ - ttywrite(vtiden, strlen(vtiden), 0); - break; - case 'c': /* RIS -- Reset to initial state */ - treset(); - resettitle(); - xloadcols(); - xsetmode(0, MODE_HIDE); - break; - case '=': /* DECPAM -- Application keypad */ - xsetmode(1, MODE_APPKEYPAD); - break; - case '>': /* DECPNM -- Normal keypad */ - xsetmode(0, MODE_APPKEYPAD); - break; - case '7': /* DECSC -- Save Cursor */ - tcursor(CURSOR_SAVE); - break; - case '8': /* DECRC -- Restore Cursor */ - tcursor(CURSOR_LOAD); - break; - case '\\': /* ST -- String Terminator */ - if (term.esc & ESC_STR_END) - strhandle(); - break; - default: - fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", - (uchar) ascii, isprint(ascii)? ascii:'.'); - break; - } - return 1; -} - -void -tputc(Rune u) -{ - char c[UTF_SIZ]; - int control; - int width, len; - Glyph *gp; - - control = ISCONTROL(u); - if (u < 127 || !IS_SET(MODE_UTF8)) { - c[0] = u; - width = len = 1; - } else { - len = utf8encode(u, c); - if (!control && (width = wcwidth(u)) == -1) - width = 1; - } - - if (IS_SET(MODE_PRINT)) - tprinter(c, len); - - /* - * STR sequence must be checked before anything else - * because it uses all following characters until it - * receives a ESC, a SUB, a ST or any other C1 control - * character. - */ - 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_STR_END; - goto check_control_code; - } - - if (strescseq.len+len >= strescseq.siz) { - /* - * 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 (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2) - return; - strescseq.siz *= 2; - strescseq.buf = xrealloc(strescseq.buf, strescseq.siz); - } - - 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 - * they must not cause conflicts with sequences. - */ - if (control) { - /* in UTF-8 mode ignore handling C1 control characters */ - if (IS_SET(MODE_UTF8) && ISCONTROLC1(u)) - return; - tcontrolcode(u); - /* - * control codes are not shown ever - */ - if (!term.esc) - term.lastc = 0; - return; - } else if (term.esc & ESC_START) { - if (term.esc & ESC_CSI) { - csiescseq.buf[csiescseq.len++] = u; - if (BETWEEN(u, 0x40, 0x7E) - || csiescseq.len >= \ - sizeof(csiescseq.buf)-1) { - term.esc = 0; - csiparse(); - csihandle(); - } - return; - } else if (term.esc & ESC_UTF8) { - tdefutf8(u); - } else if (term.esc & ESC_ALTCHARSET) { - tdeftran(u); - } else if (term.esc & ESC_TEST) { - tdectest(u); - } else { - if (!eschandle(u)) - return; - /* sequence already finished */ - } - term.esc = 0; - /* - * All characters which form part of a sequence are not - * printed - */ - return; - } - if (selected(term.c.x, term.c.y)) - selclear(); - - gp = &term.line[term.c.y][term.c.x]; - if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) { - gp->mode |= ATTR_WRAP; - tnewline(1); - gp = &term.line[term.c.y][term.c.x]; - } - - if (IS_SET(MODE_INSERT) && term.c.x+width < term.col) { - memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph)); - gp->mode &= ~ATTR_WIDE; - } - - if (term.c.x+width > term.col) { - if (IS_SET(MODE_WRAP)) - tnewline(1); - else - tmoveto(term.col - width, term.c.y); - gp = &term.line[term.c.y][term.c.x]; - } - - tsetchar(u, &term.c.attr, term.c.x, term.c.y); - term.lastc = u; - - if (width == 2) { - gp->mode |= ATTR_WIDE; - if (term.c.x+1 < term.col) { - if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) { - gp[2].u = ' '; - gp[2].mode &= ~ATTR_WDUMMY; - } - gp[1].u = '\0'; - gp[1].mode = ATTR_WDUMMY; - } - } - if (term.c.x+width < term.col) { - tmoveto(term.c.x+width, term.c.y); - } else { - term.c.state |= CURSOR_WRAPNEXT; - } -} - -int -twrite(const char *buf, int buflen, int show_ctrl) -{ - int charsize; - Rune u; - int n; - - for (n = 0; n < buflen; n += charsize) { - if (IS_SET(MODE_UTF8)) { - /* process a complete utf8 char */ - charsize = utf8decode(buf + n, &u, buflen - n); - if (charsize == 0) - break; - } else { - u = buf[n] & 0xFF; - charsize = 1; - } - if (show_ctrl && ISCONTROL(u)) { - if (u & 0x80) { - u &= 0x7f; - tputc('^'); - tputc('['); - } else if (u != '\n' && u != '\r' && u != '\t') { - u ^= 0x40; - tputc('^'); - } - } - tputc(u); - } - return n; -} - -void -tresize(int col, int row) -{ - int i; - int minrow = MIN(row, term.row); - int mincol = MIN(col, term.col); - int *bp; - TCursor c; - - if (col < 1 || row < 1) { - fprintf(stderr, - "tresize: error resizing to %dx%d\n", col, row); - return; - } - - /* - * slide screen to keep cursor where we expect it - - * tscrollup would work here, but we can optimize to - * memmove because we're freeing the earlier lines - */ - for (i = 0; i <= term.c.y - row; i++) { - free(term.line[i]); - free(term.alt[i]); - } - /* ensure that both src and dst are not NULL */ - if (i > 0) { - memmove(term.line, term.line + i, row * sizeof(Line)); - memmove(term.alt, term.alt + i, row * sizeof(Line)); - } - for (i += row; i < term.row; i++) { - free(term.line[i]); - free(term.alt[i]); - } - - /* resize to new height */ - term.line = xrealloc(term.line, row * sizeof(Line)); - term.alt = xrealloc(term.alt, row * sizeof(Line)); - term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); - term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); - - /* resize each row to new width, zero-pad if needed */ - for (i = 0; i < minrow; i++) { - term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); - term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph)); - } - - /* allocate any new rows */ - for (/* i = minrow */; i < row; i++) { - term.line[i] = xmalloc(col * sizeof(Glyph)); - term.alt[i] = xmalloc(col * sizeof(Glyph)); - } - if (col > term.col) { - bp = term.tabs + term.col; - - memset(bp, 0, sizeof(*term.tabs) * (col - term.col)); - while (--bp > term.tabs && !*bp) - /* nothing */ ; - for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces) - *bp = 1; - } - /* update terminal size */ - term.col = col; - term.row = row; - /* reset scrolling region */ - tsetscroll(0, row-1); - /* make use of the LIMIT in tmoveto */ - tmoveto(term.c.x, term.c.y); - /* Clearing both screens (it makes dirty all lines) */ - c = term.c; - for (i = 0; i < 2; i++) { - if (mincol < col && 0 < minrow) { - tclearregion(mincol, 0, col - 1, minrow - 1); - } - if (0 < col && minrow < row) { - tclearregion(0, minrow, col - 1, row - 1); - } - tswapscreen(); - tcursor(CURSOR_LOAD); - } - term.c = c; -} - -void -resettitle(void) -{ - xsettitle(NULL); -} - -void -drawregion(int x1, int y1, int x2, int y2) -{ - int y; - - for (y = y1; y < y2; y++) { - if (!term.dirty[y]) - continue; - - term.dirty[y] = 0; - xdrawline(term.line[y], x1, y, x2); - } -} - -void -draw(void) -{ - int cx = term.c.x, ocx = term.ocx, ocy = term.ocy; - - if (!xstartdraw()) - return; - - /* adjust cursor position */ - LIMIT(term.ocx, 0, term.col-1); - LIMIT(term.ocy, 0, term.row-1); - if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY) - term.ocx--; - if (term.line[term.c.y][cx].mode & ATTR_WDUMMY) - cx--; - - drawregion(0, 0, term.col, term.row); - xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], - term.ocx, term.ocy, term.line[term.ocy][term.ocx]); - term.ocx = cx; - term.ocy = term.c.y; - xfinishdraw(); - if (ocx != term.ocx || ocy != term.ocy) - xximspot(term.ocx, term.ocy); -} - -void -redraw(void) -{ - tfulldirt(); - draw(); -} diff --git a/st.c.rej b/st.c.rej deleted file mode 100644 index 406fd0e..0000000 --- a/st.c.rej +++ /dev/null @@ -1,13 +0,0 @@ ---- st.c -+++ st.c -@@ -191,8 +198,8 @@ static void tnewline(int); - static void tputtab(int); - static void tputc(Rune); - static void treset(void); --static void tscrollup(int, int); --static void tscrolldown(int, int); -+static void tscrollup(int, int, int); -+static void tscrolldown(int, int, int); - static void tsetattr(int *, int); - static void tsetchar(Rune, Glyph *, int, int); - static void tsetdirt(int, int); diff --git a/x.o b/x.o index b6428f3..ffc889f 100644 Binary files a/x.o and b/x.o differ