st

Mahdi's build of st
git clone git://mahdi.pw/st.git
Log | Files | Refs | README | LICENSE

commit 47c2c8927aa744c8bbdbcd73ecaad45cfabd981a
Author: Mahdi Mirzade <[email protected]>
Date:   Thu, 24 Mar 2022 00:26:36 +0430

Add columns redraw, hidecurser and scrollback

Diffstat:
AFAQ | 250+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ALEGACY | 17+++++++++++++++++
ALICENSE | 34++++++++++++++++++++++++++++++++++
AMakefile | 57+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
AREADME | 34++++++++++++++++++++++++++++++++++
ATODO | 28++++++++++++++++++++++++++++
Aarg.h | 50++++++++++++++++++++++++++++++++++++++++++++++++++
Aconfig.h | 490+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Aconfig.mk | 35+++++++++++++++++++++++++++++++++++
Apatches/st-blinking_cursor-20211116-2f6e597.diff | 153+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-columns-rows-reflow-st-unpatched-new.diff | 1529+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-dynamic-cursor-color-0.8.4.diff | 52++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-focus-20200731-43a395a.diff | 271+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-font2-20190416-ba72400.diff | 167+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-hidecursor-0.8.3.diff | 88+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Apatches/st-xresources-signal-reloading-20220312-6685098.diff | 165+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ast.1 | 177+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ast.c | 3112+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ast.h | 135+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ast.info | 239+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Awin.h | 40++++++++++++++++++++++++++++++++++++++++
Ax.c | 2422+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
22 files changed, 9545 insertions(+), 0 deletions(-)

diff --git a/FAQ b/FAQ @@ -0,0 +1,250 @@ +## 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 +<http://zsh.sourceforge.net/FAQ/zshfaq03.html#l25>: + + 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 +<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html#tag_20_11_13>. +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 +<https://lists.suckless.org/dev/1404/20697.html>. 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. diff --git a/LEGACY b/LEGACY @@ -0,0 +1,17 @@ +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 <[email protected]> +2012-09-13T07:00:36.081271045+02:00 + diff --git a/LICENSE b/LICENSE @@ -0,0 +1,34 @@ +MIT/X Consortium License + +© 2014-2022 Hiltjo Posthuma <hiltjo at codemadness dot org> +© 2018 Devin J. Pohly <djpohly at gmail dot com> +© 2014-2017 Quentin Rameau <quinq at fifth dot space> +© 2009-2012 Aurélien APTEL <aurelien dot aptel at gmail dot com> +© 2008-2017 Anselm R Garbe <garbeam at gmail dot com> +© 2012-2017 Roberto E. Vargas Caballero <k0ga at shike2 dot com> +© 2012-2016 Christoph Lohmann <20h at r-36 dot net> +© 2013 Eon S. Jeon <esjeon at hyunmu dot am> +© 2013 Alexander Sedov <alex0player at gmail dot com> +© 2013 Mark Edgar <medgar123 at gmail dot com> +© 2013-2014 Eric Pruitt <eric.pruitt at gmail dot com> +© 2013 Michael Forney <mforney at mforney dot org> +© 2013-2014 Markus Teich <markus dot teich at stusta dot mhn dot de> +© 2014-2015 Laslo Hunhold <dev at frign dot de> + +Permission is hereby granted, free of charge, to any person obtaining a +copy of this software and associated documentation files (the "Software"), +to deal in the Software without restriction, including without limitation +the rights to use, copy, modify, merge, publish, distribute, sublicense, +and/or sell copies of the Software, and to permit persons to whom the +Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/Makefile b/Makefile @@ -0,0 +1,57 @@ +# st - simple terminal +# See LICENSE file for copyright and license details. +.POSIX: + +include config.mk + +SRC = st.c x.c +OBJ = $(SRC:.c=.o) + +all: options st + +options: + @echo st build options: + @echo "CFLAGS = $(STCFLAGS)" + @echo "LDFLAGS = $(STLDFLAGS)" + @echo "CC = $(CC)" + +config.h: + cp config.def.h config.h + +.c.o: + $(CC) $(STCFLAGS) -c $< + +st.o: config.h st.h win.h +x.o: arg.h config.h st.h win.h + +$(OBJ): config.h config.mk + +st: $(OBJ) + $(CC) -o $@ $(OBJ) $(STLDFLAGS) + +clean: + rm -f st $(OBJ) st-$(VERSION).tar.gz + +dist: clean + mkdir -p st-$(VERSION) + cp -R FAQ LEGACY TODO LICENSE Makefile README config.mk\ + config.def.h st.info st.1 arg.h st.h win.h $(SRC)\ + st-$(VERSION) + tar -cf - st-$(VERSION) | gzip > st-$(VERSION).tar.gz + rm -rf st-$(VERSION) + +install: st + mkdir -p $(DESTDIR)$(PREFIX)/bin + cp -f st $(DESTDIR)$(PREFIX)/bin + chmod 755 $(DESTDIR)$(PREFIX)/bin/st + mkdir -p $(DESTDIR)$(MANPREFIX)/man1 + sed "s/VERSION/$(VERSION)/g" < st.1 > $(DESTDIR)$(MANPREFIX)/man1/st.1 + chmod 644 $(DESTDIR)$(MANPREFIX)/man1/st.1 + tic -sx st.info + @echo Please see the README file regarding the terminfo entry of st. + +uninstall: + rm -f $(DESTDIR)$(PREFIX)/bin/st + rm -f $(DESTDIR)$(MANPREFIX)/man1/st.1 + +.PHONY: all options clean dist install uninstall diff --git a/README b/README @@ -0,0 +1,34 @@ +st - simple terminal +-------------------- +st is a simple terminal emulator for X which sucks less. + + +Requirements +------------ +In order to build st you need the Xlib header files. + + +Installation +------------ +Edit config.mk to match your local setup (st is installed into +the /usr/local namespace by default). + +Afterwards enter the following command to build and install st (if +necessary as root): + + make clean install + + +Running st +---------- +If you did not install st with make clean install, you must compile +the st terminfo entry with the following command: + + tic -sx st.info + +See the man page for additional details. + +Credits +------- +Based on Aurélien APTEL <aurelien dot aptel at gmail dot com> bt source code. + diff --git a/TODO b/TODO @@ -0,0 +1,28 @@ +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/arg.h b/arg.h @@ -0,0 +1,50 @@ +/* + * Copy me if you can. + * by 20h + */ + +#ifndef ARG_H__ +#define ARG_H__ + +extern char *argv0; + +/* use main(int argc, char *argv[]) */ +#define ARGBEGIN for (argv0 = *argv, argv++, argc--;\ + argv[0] && argv[0][0] == '-'\ + && argv[0][1];\ + argc--, argv++) {\ + char argc_;\ + char **argv_;\ + int brk_;\ + if (argv[0][1] == '-' && argv[0][2] == '\0') {\ + argv++;\ + argc--;\ + break;\ + }\ + int i_;\ + for (i_ = 1, brk_ = 0, argv_ = argv;\ + argv[0][i_] && !brk_;\ + i_++) {\ + if (argv_ != argv)\ + break;\ + argc_ = argv[0][i_];\ + switch (argc_) + +#define ARGEND }\ + } + +#define ARGC() argc_ + +#define EARGF(x) ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\ + ((x), abort(), (char *)0) :\ + (brk_ = 1, (argv[0][i_+1] != '\0')?\ + (&argv[0][i_+1]) :\ + (argc--, argv++, argv[0]))) + +#define ARGF() ((argv[0][i_+1] == '\0' && argv[1] == NULL)?\ + (char *)0 :\ + (brk_ = 1, (argv[0][i_+1] != '\0')?\ + (&argv[0][i_+1]) :\ + (argc--, argv++, argv[0]))) + +#endif diff --git a/config.h b/config.h @@ -0,0 +1,490 @@ +/* See LICENSE file for copyright and license details. */ + +/* + * appearance + * + * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html + */ +static char *font = "monospace:pixelsize=12:antialias=true:autohint=true"; +/* Spare fonts */ +static char *font2[] = { + "Vazir:pixelsize=12:antialias=true:autohint=true", + "JoyPixels:pixelsize=10:antialias=true:autohint=true", +}; +static int borderpx = 2; + +/* + * What program is execed by st depends of these precedence rules: + * 1: program passed with -e + * 2: scroll and/or utmp + * 3: SHELL environment variable + * 4: value of shell in /etc/passwd + * 5: value of shell in config.h + */ +static char *shell = "/bin/sh"; +char *utmp = NULL; +/* scroll program: to enable use a string like "scroll" */ +char *scroll = NULL; +char *stty_args = "stty raw pass8 nl -echo -iexten -cstopb 38400"; + +/* identification sequence returned in DA and DECID */ +char *vtiden = "\033[?6c"; + +/* Kerning / character bounding-box multipliers */ +static float cwscale = 1.0; +static float chscale = 1.0; + +/* + * word delimiter string + * + * More advanced example: L" `'\"()[]{}" + */ +wchar_t *worddelimiters = L" "; + +/* selection timeouts (in milliseconds) */ +static unsigned int doubleclicktimeout = 300; +static unsigned int tripleclicktimeout = 600; + +/* alt screens */ +int allowaltscreen = 1; + +/* allow certain non-interactive (insecure) window operations such as: + setting the clipboard text */ +int allowwindowops = 0; + +/* + * draw latency range in ms - from new content/keypress/etc until drawing. + * within this range, st draws when content stops arriving (idle). mostly it's + * near minlatency, but it waits longer for slow updates to avoid partial draw. + * low minlatency will tear/flicker more, as it can "detect" idle too early. + */ +static double minlatency = 8; +static double maxlatency = 33; + +/* + * blinking timeout (set to 0 to disable blinking) for the terminal blinking + * attribute. + */ +static unsigned int blinktimeout = 800; + +/* + * thickness of underline and bar cursors + */ +static unsigned int cursorthickness = 2; + +/* + * bell volume. It must be a value between -100 and 100. Use 0 for disabling + * it + */ +static int bellvolume = 0; + +/* default TERM value */ +char *termname = "st-256color"; + +/* + * spaces per tab + * + * When you are changing this value, don't forget to adapt the »it« value in + * the st.info and appropriately install the st.info in the environment where + * you use this st version. + * + * it#$tabspaces, + * + * Secondly make sure your kernel is not expanding tabs. When running `stty + * -a` »tab0« should appear. You can tell the terminal to not expand tabs by + * running following command: + * + * stty tabs + */ +unsigned int tabspaces = 8; + +/* bg opacity */ +float alpha = 0.98, alphaUnfocused = 0.96; + +/* Terminal colors (16 first used in escape sequence) */ +static const char *colorname[] = { + "#3B4252", /* color0 */ + "#BF616A", /* color1 */ + "#A3BE8C", /* color2 */ + "#EBCB8B", /* color3 */ + "#81A1C1", /* color4 */ + "#B48EAD", /* color5 */ + "#88C0D0", /* color6 */ + "#E5E9F0", /* color7 */ + "#4C566A", /* color8 */ + "#BF616A", /* color9 */ + "#A3BE8C", /* color10 */ + "#EBCB8B", /* color11 */ + "#81A1C1", /* color12 */ + "#B48EAD", /* color13 */ + "#8FBCBB", /* color14 */ + "#ECEFF4", /* color15 */ + + [255] = 0, + + /* more colors can be added after 255 to use with DefaultXX */ + "#D8DEE9", /* 256: cursor color */ + "#555555", /* 257: reverse cursor color */ + "#D8DEE9", /* default foreground color */ + "#2E3440", /* default background color */ +}; + +/* + * Default colors (colorname index) + * foreground, background, cursor, reverse cursor + */ +unsigned int defaultcs = 256; +unsigned int defaultrcs = 257; +unsigned int defaultfg = 258; +unsigned int defaultbg = 259; +unsigned int bg = 0, bgUnfocused = 0; + +/* + * https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-SP-q.1D81 + * Default style of cursor + * 0: blinking block + * 1: blinking block (default) + * 2: steady block ("█") + * 3: blinking underline + * 4: steady underline ("_") + * 5: blinking bar + * 6: steady bar ("|") + * 7: blinking st cursor + * 8: steady st cursor + */ +static unsigned int cursorstyle = 5; +static Rune stcursor = 0x2603; /* snowman ("☃") */ + +/* + * Default columns and rows numbers + */ + +static unsigned int cols = 80; +static unsigned int rows = 24; + +/* + * Default colour and shape of the mouse cursor + */ +static unsigned int mouseshape = XC_xterm; +static unsigned int mousefg = 7; +static unsigned int mousebg = 0; + +/* + * Color used to display font attributes when fontconfig selected a font which + * doesn't match the ones requested. + */ +static unsigned int defaultattr = 11; + +/* + * Force mouse select/shortcuts while mask is active (when MODE_MOUSE is set). + * Note that if you want to use ShiftMask with selmasks, set this to an other + * modifier, set to 0 to not use it. + */ +static uint forcemousemod = ShiftMask; + +/* + * Internal mouse shortcuts. + * Beware that overloading Button1 will disable the selection. + */ +static MouseShortcut mshortcuts[] = { + /* mask button function argument release */ + { XK_ANY_MOD, Button2, selpaste, {.i = 0}, 1 }, + //{ XK_ANY_MOD, Button4, ttysend, {.s = "\031"} }, + //{ XK_ANY_MOD, Button5, ttysend, {.s = "\005"} }, + { XK_ANY_MOD, Button4, kscrollup, {.i = 1} }, + { XK_ANY_MOD, Button5, kscrolldown, {.i = 1} }, + { ShiftMask, Button4, ttysend, {.s = "\033[5;2~"} }, + { ShiftMask, Button5, ttysend, {.s = "\033[6;2~"} }, +}; + +/* Internal keyboard shortcuts. */ +#define MODKEY Mod1Mask +#define TERMMOD (ControlMask|ShiftMask) + +static Shortcut shortcuts[] = { + /* mask keysym function argument */ + { XK_ANY_MOD, XK_Break, sendbreak, {.i = 0} }, + { ControlMask, XK_Print, toggleprinter, {.i = 0} }, + { ShiftMask, XK_Print, printscreen, {.i = 0} }, + { XK_ANY_MOD, XK_Print, printsel, {.i = 0} }, + { ControlMask, XK_equal, zoomreset, {.f = 0} }, + { TERMMOD, XK_plus, zoom, {.f = +1} }, + { TERMMOD, XK_underscore, zoom, {.f = -1} }, + { TERMMOD, XK_C, clipcopy, {.i = 0} }, + { TERMMOD, XK_V, clippaste, {.i = 0} }, + { TERMMOD, XK_Y, selpaste, {.i = 0} }, + { ShiftMask, XK_Insert, selpaste, {.i = 0} }, + { TERMMOD, XK_Num_Lock, numlock, {.i = 0} }, + { ShiftMask, XK_Up, kscrollup, {.i = -1} }, + { ShiftMask, XK_Down, kscrolldown, {.i = -1} }, +}; + +/* + * Special keys (change & recompile st.info accordingly) + * + * Mask value: + * * Use XK_ANY_MOD to match the key no matter modifiers state + * * Use XK_NO_MOD to match the key alone (no modifiers) + * appkey value: + * * 0: no value + * * > 0: keypad application mode enabled + * * = 2: term.numlock = 1 + * * < 0: keypad application mode disabled + * appcursor value: + * * 0: no value + * * > 0: cursor application mode enabled + * * < 0: cursor application mode disabled + * + * Be careful with the order of the definitions because st searches in + * this table sequentially, so any XK_ANY_MOD must be in the last + * position for a key. + */ + +/* + * If you want keys other than the X11 function keys (0xFD00 - 0xFFFF) + * to be mapped below, add them to this array. + */ +static KeySym mappedkeys[] = { -1 }; + +/* + * State bits to ignore when matching key or button events. By default, + * numlock (Mod2Mask) and keyboard layout (XK_SWITCH_MOD) are ignored. + */ +static uint ignoremod = Mod2Mask|XK_SWITCH_MOD; + +/* + * This is the huge key array which defines all compatibility to the Linux + * world. Please decide about changes wisely. + */ +static Key key[] = { + /* keysym mask string appkey appcursor */ + { XK_KP_Home, ShiftMask, "\033[2J", 0, -1}, + { XK_KP_Home, ShiftMask, "\033[1;2H", 0, +1}, + { XK_KP_Home, XK_ANY_MOD, "\033[H", 0, -1}, + { XK_KP_Home, XK_ANY_MOD, "\033[1~", 0, +1}, + { XK_KP_Up, XK_ANY_MOD, "\033Ox", +1, 0}, + { XK_KP_Up, XK_ANY_MOD, "\033[A", 0, -1}, + { XK_KP_Up, XK_ANY_MOD, "\033OA", 0, +1}, + { XK_KP_Down, XK_ANY_MOD, "\033Or", +1, 0}, + { XK_KP_Down, XK_ANY_MOD, "\033[B", 0, -1}, + { XK_KP_Down, XK_ANY_MOD, "\033OB", 0, +1}, + { XK_KP_Left, XK_ANY_MOD, "\033Ot", +1, 0}, + { XK_KP_Left, XK_ANY_MOD, "\033[D", 0, -1}, + { XK_KP_Left, XK_ANY_MOD, "\033OD", 0, +1}, + { XK_KP_Right, XK_ANY_MOD, "\033Ov", +1, 0}, + { XK_KP_Right, XK_ANY_MOD, "\033[C", 0, -1}, + { XK_KP_Right, XK_ANY_MOD, "\033OC", 0, +1}, + { XK_KP_Prior, ShiftMask, "\033[5;2~", 0, 0}, + { XK_KP_Prior, XK_ANY_MOD, "\033[5~", 0, 0}, + { XK_KP_Begin, XK_ANY_MOD, "\033[E", 0, 0}, + { XK_KP_End, ControlMask, "\033[J", -1, 0}, + { XK_KP_End, ControlMask, "\033[1;5F", +1, 0}, + { XK_KP_End, ShiftMask, "\033[K", -1, 0}, + { XK_KP_End, ShiftMask, "\033[1;2F", +1, 0}, + { XK_KP_End, XK_ANY_MOD, "\033[4~", 0, 0}, + { XK_KP_Next, ShiftMask, "\033[6;2~", 0, 0}, + { XK_KP_Next, XK_ANY_MOD, "\033[6~", 0, 0}, + { XK_KP_Insert, ShiftMask, "\033[2;2~", +1, 0}, + { XK_KP_Insert, ShiftMask, "\033[4l", -1, 0}, + { XK_KP_Insert, ControlMask, "\033[L", -1, 0}, + { XK_KP_Insert, ControlMask, "\033[2;5~", +1, 0}, + { XK_KP_Insert, XK_ANY_MOD, "\033[4h", -1, 0}, + { XK_KP_Insert, XK_ANY_MOD, "\033[2~", +1, 0}, + { XK_KP_Delete, ControlMask, "\033[M", -1, 0}, + { XK_KP_Delete, ControlMask, "\033[3;5~", +1, 0}, + { XK_KP_Delete, ShiftMask, "\033[2K", -1, 0}, + { XK_KP_Delete, ShiftMask, "\033[3;2~", +1, 0}, + { XK_KP_Delete, XK_ANY_MOD, "\033[P", -1, 0}, + { XK_KP_Delete, XK_ANY_MOD, "\033[3~", +1, 0}, + { XK_KP_Multiply, XK_ANY_MOD, "\033Oj", +2, 0}, + { XK_KP_Add, XK_ANY_MOD, "\033Ok", +2, 0}, + { XK_KP_Enter, XK_ANY_MOD, "\033OM", +2, 0}, + { XK_KP_Enter, XK_ANY_MOD, "\r", -1, 0}, + { XK_KP_Subtract, XK_ANY_MOD, "\033Om", +2, 0}, + { XK_KP_Decimal, XK_ANY_MOD, "\033On", +2, 0}, + { XK_KP_Divide, XK_ANY_MOD, "\033Oo", +2, 0}, + { XK_KP_0, XK_ANY_MOD, "\033Op", +2, 0}, + { XK_KP_1, XK_ANY_MOD, "\033Oq", +2, 0}, + { XK_KP_2, XK_ANY_MOD, "\033Or", +2, 0}, + { XK_KP_3, XK_ANY_MOD, "\033Os", +2, 0}, + { XK_KP_4, XK_ANY_MOD, "\033Ot", +2, 0}, + { XK_KP_5, XK_ANY_MOD, "\033Ou", +2, 0}, + { XK_KP_6, XK_ANY_MOD, "\033Ov", +2, 0}, + { XK_KP_7, XK_ANY_MOD, "\033Ow", +2, 0}, + { XK_KP_8, XK_ANY_MOD, "\033Ox", +2, 0}, + { XK_KP_9, XK_ANY_MOD, "\033Oy", +2, 0}, + { XK_Up, ShiftMask, "\033[1;2A", 0, 0}, + { XK_Up, Mod1Mask, "\033[1;3A", 0, 0}, + { XK_Up, ShiftMask|Mod1Mask,"\033[1;4A", 0, 0}, + { XK_Up, ControlMask, "\033[1;5A", 0, 0}, + { XK_Up, ShiftMask|ControlMask,"\033[1;6A", 0, 0}, + { XK_Up, ControlMask|Mod1Mask,"\033[1;7A", 0, 0}, + { XK_Up,ShiftMask|ControlMask|Mod1Mask,"\033[1;8A", 0, 0}, + { XK_Up, XK_ANY_MOD, "\033[A", 0, -1}, + { XK_Up, XK_ANY_MOD, "\033OA", 0, +1}, + { XK_Down, ShiftMask, "\033[1;2B", 0, 0}, + { XK_Down, Mod1Mask, "\033[1;3B", 0, 0}, + { XK_Down, ShiftMask|Mod1Mask,"\033[1;4B", 0, 0}, + { XK_Down, ControlMask, "\033[1;5B", 0, 0}, + { XK_Down, ShiftMask|ControlMask,"\033[1;6B", 0, 0}, + { XK_Down, ControlMask|Mod1Mask,"\033[1;7B", 0, 0}, + { XK_Down,ShiftMask|ControlMask|Mod1Mask,"\033[1;8B",0, 0}, + { XK_Down, XK_ANY_MOD, "\033[B", 0, -1}, + { XK_Down, XK_ANY_MOD, "\033OB", 0, +1}, + { XK_Left, ShiftMask, "\033[1;2D", 0, 0}, + { XK_Left, Mod1Mask, "\033[1;3D", 0, 0}, + { XK_Left, ShiftMask|Mod1Mask,"\033[1;4D", 0, 0}, + { XK_Left, ControlMask, "\033[1;5D", 0, 0}, + { XK_Left, ShiftMask|ControlMask,"\033[1;6D", 0, 0}, + { XK_Left, ControlMask|Mod1Mask,"\033[1;7D", 0, 0}, + { XK_Left,ShiftMask|ControlMask|Mod1Mask,"\033[1;8D",0, 0}, + { XK_Left, XK_ANY_MOD, "\033[D", 0, -1}, + { XK_Left, XK_ANY_MOD, "\033OD", 0, +1}, + { XK_Right, ShiftMask, "\033[1;2C", 0, 0}, + { XK_Right, Mod1Mask, "\033[1;3C", 0, 0}, + { XK_Right, ShiftMask|Mod1Mask,"\033[1;4C", 0, 0}, + { XK_Right, ControlMask, "\033[1;5C", 0, 0}, + { XK_Right, ShiftMask|ControlMask,"\033[1;6C", 0, 0}, + { XK_Right, ControlMask|Mod1Mask,"\033[1;7C", 0, 0}, + { XK_Right,ShiftMask|ControlMask|Mod1Mask,"\033[1;8C",0, 0}, + { XK_Right, XK_ANY_MOD, "\033[C", 0, -1}, + { XK_Right, XK_ANY_MOD, "\033OC", 0, +1}, + { XK_ISO_Left_Tab, ShiftMask, "\033[Z", 0, 0}, + { XK_Return, Mod1Mask, "\033\r", 0, 0}, + { XK_Return, XK_ANY_MOD, "\r", 0, 0}, + { XK_Insert, ShiftMask, "\033[4l", -1, 0}, + { XK_Insert, ShiftMask, "\033[2;2~", +1, 0}, + { XK_Insert, ControlMask, "\033[L", -1, 0}, + { XK_Insert, ControlMask, "\033[2;5~", +1, 0}, + { XK_Insert, XK_ANY_MOD, "\033[4h", -1, 0}, + { XK_Insert, XK_ANY_MOD, "\033[2~", +1, 0}, + { XK_Delete, ControlMask, "\033[M", -1, 0}, + { XK_Delete, ControlMask, "\033[3;5~", +1, 0}, + { XK_Delete, ShiftMask, "\033[2K", -1, 0}, + { XK_Delete, ShiftMask, "\033[3;2~", +1, 0}, + { XK_Delete, XK_ANY_MOD, "\033[P", -1, 0}, + { XK_Delete, XK_ANY_MOD, "\033[3~", +1, 0}, + { XK_BackSpace, XK_NO_MOD, "\177", 0, 0}, + { XK_BackSpace, Mod1Mask, "\033\177", 0, 0}, + { XK_Home, ShiftMask, "\033[2J", 0, -1}, + { XK_Home, ShiftMask, "\033[1;2H", 0, +1}, + { XK_Home, XK_ANY_MOD, "\033[H", 0, -1}, + { XK_Home, XK_ANY_MOD, "\033[1~", 0, +1}, + { XK_End, ControlMask, "\033[J", -1, 0}, + { XK_End, ControlMask, "\033[1;5F", +1, 0}, + { XK_End, ShiftMask, "\033[K", -1, 0}, + { XK_End, ShiftMask, "\033[1;2F", +1, 0}, + { XK_End, XK_ANY_MOD, "\033[4~", 0, 0}, + { XK_Prior, ControlMask, "\033[5;5~", 0, 0}, + { XK_Prior, ShiftMask, "\033[5;2~", 0, 0}, + { XK_Prior, XK_ANY_MOD, "\033[5~", 0, 0}, + { XK_Next, ControlMask, "\033[6;5~", 0, 0}, + { XK_Next, ShiftMask, "\033[6;2~", 0, 0}, + { XK_Next, XK_ANY_MOD, "\033[6~", 0, 0}, + { XK_F1, XK_NO_MOD, "\033OP" , 0, 0}, + { XK_F1, /* F13 */ ShiftMask, "\033[1;2P", 0, 0}, + { XK_F1, /* F25 */ ControlMask, "\033[1;5P", 0, 0}, + { XK_F1, /* F37 */ Mod4Mask, "\033[1;6P", 0, 0}, + { XK_F1, /* F49 */ Mod1Mask, "\033[1;3P", 0, 0}, + { XK_F1, /* F61 */ Mod3Mask, "\033[1;4P", 0, 0}, + { XK_F2, XK_NO_MOD, "\033OQ" , 0, 0}, + { XK_F2, /* F14 */ ShiftMask, "\033[1;2Q", 0, 0}, + { XK_F2, /* F26 */ ControlMask, "\033[1;5Q", 0, 0}, + { XK_F2, /* F38 */ Mod4Mask, "\033[1;6Q", 0, 0}, + { XK_F2, /* F50 */ Mod1Mask, "\033[1;3Q", 0, 0}, + { XK_F2, /* F62 */ Mod3Mask, "\033[1;4Q", 0, 0}, + { XK_F3, XK_NO_MOD, "\033OR" , 0, 0}, + { XK_F3, /* F15 */ ShiftMask, "\033[1;2R", 0, 0}, + { XK_F3, /* F27 */ ControlMask, "\033[1;5R", 0, 0}, + { XK_F3, /* F39 */ Mod4Mask, "\033[1;6R", 0, 0}, + { XK_F3, /* F51 */ Mod1Mask, "\033[1;3R", 0, 0}, + { XK_F3, /* F63 */ Mod3Mask, "\033[1;4R", 0, 0}, + { XK_F4, XK_NO_MOD, "\033OS" , 0, 0}, + { XK_F4, /* F16 */ ShiftMask, "\033[1;2S", 0, 0}, + { XK_F4, /* F28 */ ControlMask, "\033[1;5S", 0, 0}, + { XK_F4, /* F40 */ Mod4Mask, "\033[1;6S", 0, 0}, + { XK_F4, /* F52 */ Mod1Mask, "\033[1;3S", 0, 0}, + { XK_F5, XK_NO_MOD, "\033[15~", 0, 0}, + { XK_F5, /* F17 */ ShiftMask, "\033[15;2~", 0, 0}, + { XK_F5, /* F29 */ ControlMask, "\033[15;5~", 0, 0}, + { XK_F5, /* F41 */ Mod4Mask, "\033[15;6~", 0, 0}, + { XK_F5, /* F53 */ Mod1Mask, "\033[15;3~", 0, 0}, + { XK_F6, XK_NO_MOD, "\033[17~", 0, 0}, + { XK_F6, /* F18 */ ShiftMask, "\033[17;2~", 0, 0}, + { XK_F6, /* F30 */ ControlMask, "\033[17;5~", 0, 0}, + { XK_F6, /* F42 */ Mod4Mask, "\033[17;6~", 0, 0}, + { XK_F6, /* F54 */ Mod1Mask, "\033[17;3~", 0, 0}, + { XK_F7, XK_NO_MOD, "\033[18~", 0, 0}, + { XK_F7, /* F19 */ ShiftMask, "\033[18;2~", 0, 0}, + { XK_F7, /* F31 */ ControlMask, "\033[18;5~", 0, 0}, + { XK_F7, /* F43 */ Mod4Mask, "\033[18;6~", 0, 0}, + { XK_F7, /* F55 */ Mod1Mask, "\033[18;3~", 0, 0}, + { XK_F8, XK_NO_MOD, "\033[19~", 0, 0}, + { XK_F8, /* F20 */ ShiftMask, "\033[19;2~", 0, 0}, + { XK_F8, /* F32 */ ControlMask, "\033[19;5~", 0, 0}, + { XK_F8, /* F44 */ Mod4Mask, "\033[19;6~", 0, 0}, + { XK_F8, /* F56 */ Mod1Mask, "\033[19;3~", 0, 0}, + { XK_F9, XK_NO_MOD, "\033[20~", 0, 0}, + { XK_F9, /* F21 */ ShiftMask, "\033[20;2~", 0, 0}, + { XK_F9, /* F33 */ ControlMask, "\033[20;5~", 0, 0}, + { XK_F9, /* F45 */ Mod4Mask, "\033[20;6~", 0, 0}, + { XK_F9, /* F57 */ Mod1Mask, "\033[20;3~", 0, 0}, + { XK_F10, XK_NO_MOD, "\033[21~", 0, 0}, + { XK_F10, /* F22 */ ShiftMask, "\033[21;2~", 0, 0}, + { XK_F10, /* F34 */ ControlMask, "\033[21;5~", 0, 0}, + { XK_F10, /* F46 */ Mod4Mask, "\033[21;6~", 0, 0}, + { XK_F10, /* F58 */ Mod1Mask, "\033[21;3~", 0, 0}, + { XK_F11, XK_NO_MOD, "\033[23~", 0, 0}, + { XK_F11, /* F23 */ ShiftMask, "\033[23;2~", 0, 0}, + { XK_F11, /* F35 */ ControlMask, "\033[23;5~", 0, 0}, + { XK_F11, /* F47 */ Mod4Mask, "\033[23;6~", 0, 0}, + { XK_F11, /* F59 */ Mod1Mask, "\033[23;3~", 0, 0}, + { XK_F12, XK_NO_MOD, "\033[24~", 0, 0}, + { XK_F12, /* F24 */ ShiftMask, "\033[24;2~", 0, 0}, + { XK_F12, /* F36 */ ControlMask, "\033[24;5~", 0, 0}, + { XK_F12, /* F48 */ Mod4Mask, "\033[24;6~", 0, 0}, + { XK_F12, /* F60 */ Mod1Mask, "\033[24;3~", 0, 0}, + { XK_F13, XK_NO_MOD, "\033[1;2P", 0, 0}, + { XK_F14, XK_NO_MOD, "\033[1;2Q", 0, 0}, + { XK_F15, XK_NO_MOD, "\033[1;2R", 0, 0}, + { XK_F16, XK_NO_MOD, "\033[1;2S", 0, 0}, + { XK_F17, XK_NO_MOD, "\033[15;2~", 0, 0}, + { XK_F18, XK_NO_MOD, "\033[17;2~", 0, 0}, + { XK_F19, XK_NO_MOD, "\033[18;2~", 0, 0}, + { XK_F20, XK_NO_MOD, "\033[19;2~", 0, 0}, + { XK_F21, XK_NO_MOD, "\033[20;2~", 0, 0}, + { XK_F22, XK_NO_MOD, "\033[21;2~", 0, 0}, + { XK_F23, XK_NO_MOD, "\033[23;2~", 0, 0}, + { XK_F24, XK_NO_MOD, "\033[24;2~", 0, 0}, + { XK_F25, XK_NO_MOD, "\033[1;5P", 0, 0}, + { XK_F26, XK_NO_MOD, "\033[1;5Q", 0, 0}, + { XK_F27, XK_NO_MOD, "\033[1;5R", 0, 0}, + { XK_F28, XK_NO_MOD, "\033[1;5S", 0, 0}, + { XK_F29, XK_NO_MOD, "\033[15;5~", 0, 0}, + { XK_F30, XK_NO_MOD, "\033[17;5~", 0, 0}, + { XK_F31, XK_NO_MOD, "\033[18;5~", 0, 0}, + { XK_F32, XK_NO_MOD, "\033[19;5~", 0, 0}, + { XK_F33, XK_NO_MOD, "\033[20;5~", 0, 0}, + { XK_F34, XK_NO_MOD, "\033[21;5~", 0, 0}, + { XK_F35, XK_NO_MOD, "\033[23;5~", 0, 0}, +}; + +/* + * Selection types' masks. + * Use the same masks as usual. + * Button1Mask is always unset, to make masks match between ButtonPress. + * ButtonRelease and MotionNotify. + * If no match is found, regular selection is used. + */ +static uint selmasks[] = { + [SEL_RECTANGULAR] = Mod1Mask, +}; + +/* + * Printable characters in ASCII, used to estimate the advance width + * of single wide characters. + */ +static char ascii_printable[] = + " !\"#$%&'()*+,-./0123456789:;<=>?" + "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_" + "`abcdefghijklmnopqrstuvwxyz{|}~"; diff --git a/config.mk b/config.mk @@ -0,0 +1,35 @@ +# st version +VERSION = 0.8.5 + +# Customize below to fit your system + +# paths +PREFIX = /usr/local +MANPREFIX = $(PREFIX)/share/man + +X11INC = /usr/X11R6/include +X11LIB = /usr/X11R6/lib + +PKG_CONFIG = pkg-config + +# includes and libs +INCS = -I$(X11INC) \ + `$(PKG_CONFIG) --cflags fontconfig` \ + `$(PKG_CONFIG) --cflags freetype2` +LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft -lXrender\ + `$(PKG_CONFIG) --libs fontconfig` \ + `$(PKG_CONFIG) --libs freetype2` + +# flags +STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600 +STCFLAGS = $(INCS) $(STCPPFLAGS) $(CPPFLAGS) $(CFLAGS) +STLDFLAGS = $(LIBS) $(LDFLAGS) + +# OpenBSD: +#CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600 -D_BSD_SOURCE +#LIBS = -L$(X11LIB) -lm -lX11 -lutil -lXft \ +# `$(PKG_CONFIG) --libs fontconfig` \ +# `$(PKG_CONFIG) --libs freetype2` + +# compiler and linker +# CC = c99 diff --git a/patches/st-blinking_cursor-20211116-2f6e597.diff b/patches/st-blinking_cursor-20211116-2f6e597.diff @@ -0,0 +1,153 @@ +From a3cdd0753bf578cd4e6db7c6507481f3b5c38aea Mon Sep 17 00:00:00 2001 +From: Steve Ward <[email protected]> +Date: Tue, 16 Nov 2021 14:15:06 -0500 +Subject: [PATCH] Allow blinking cursor + +--- + config.def.h | 19 +++++++++++++------ + x.c | 47 +++++++++++++++++++++++++++++++++++------------ + 2 files changed, 48 insertions(+), 18 deletions(-) + +diff --git a/config.def.h b/config.def.h +index 6f05dce..1a5fed0 100644 +--- a/config.def.h ++++ b/config.def.h +@@ -133,13 +133,20 @@ static unsigned int defaultcs = 256; + static unsigned int defaultrcs = 257; + + /* +- * Default shape of cursor +- * 2: Block ("█") +- * 4: Underline ("_") +- * 6: Bar ("|") +- * 7: Snowman ("☃") ++ * https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-SP-q.1D81 ++ * Default style of cursor ++ * 0: blinking block ++ * 1: blinking block (default) ++ * 2: steady block ("█") ++ * 3: blinking underline ++ * 4: steady underline ("_") ++ * 5: blinking bar ++ * 6: steady bar ("|") ++ * 7: blinking st cursor ++ * 8: steady st cursor + */ +-static unsigned int cursorshape = 2; ++static unsigned int cursorstyle = 1; ++static Rune stcursor = 0x2603; /* snowman ("☃") */ + + /* + * Default columns and rows numbers +diff --git a/x.c b/x.c +index 89786b8..7d2447d 100644 +--- a/x.c ++++ b/x.c +@@ -253,6 +253,7 @@ static char *opt_name = NULL; + static char *opt_title = NULL; + + static int oldbutton = 3; /* button event on startup: 3 = release */ ++static int cursorblinks = 0; + + void + clipcopy(const Arg *dummy) +@@ -1529,29 +1530,44 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) + /* draw the new one */ + if (IS_SET(MODE_FOCUSED)) { + switch (win.cursor) { +- case 7: /* st extension */ +- g.u = 0x2603; /* snowman (U+2603) */ ++ default: ++ case 0: /* blinking block */ ++ case 1: /* blinking block (default) */ ++ if (IS_SET(MODE_BLINK)) ++ break; + /* FALLTHROUGH */ +- case 0: /* Blinking Block */ +- case 1: /* Blinking Block (Default) */ +- case 2: /* Steady Block */ ++ case 2: /* steady block */ + xdrawglyph(g, cx, cy); + break; +- case 3: /* Blinking Underline */ +- case 4: /* Steady Underline */ ++ case 3: /* blinking underline */ ++ if (IS_SET(MODE_BLINK)) ++ break; ++ /* FALLTHROUGH */ ++ case 4: /* steady underline */ + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + (cy + 1) * win.ch - \ + cursorthickness, + win.cw, cursorthickness); + break; +- case 5: /* Blinking bar */ +- case 6: /* Steady bar */ ++ case 5: /* blinking bar */ ++ if (IS_SET(MODE_BLINK)) ++ break; ++ /* FALLTHROUGH */ ++ case 6: /* steady bar */ + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + cy * win.ch, + cursorthickness, win.ch); + break; ++ case 7: /* blinking st cursor */ ++ if (IS_SET(MODE_BLINK)) ++ break; ++ /* FALLTHROUGH */ ++ case 8: /* steady st cursor */ ++ g.u = stcursor; ++ xdrawglyph(g, cx, cy); ++ break; + } + } else { + XftDrawRect(xw.draw, &drawcol, +@@ -1708,9 +1724,12 @@ xsetmode(int set, unsigned int flags) + int + xsetcursor(int cursor) + { +- if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */ ++ if (!BETWEEN(cursor, 0, 8)) /* 7-8: st extensions */ + return 1; + win.cursor = cursor; ++ cursorblinks = win.cursor == 0 || win.cursor == 1 || ++ win.cursor == 3 || win.cursor == 5 || ++ win.cursor == 7; + return 0; + } + +@@ -1954,6 +1973,10 @@ run(void) + if (FD_ISSET(ttyfd, &rfd) || xev) { + if (!drawing) { + trigger = now; ++ if (IS_SET(MODE_BLINK)) { ++ win.mode ^= MODE_BLINK; ++ } ++ lastblink = now; + drawing = 1; + } + timeout = (maxlatency - TIMEDIFF(now, trigger)) \ +@@ -1964,7 +1987,7 @@ run(void) + + /* idle detected or maxlatency exhausted -> draw */ + timeout = -1; +- if (blinktimeout && tattrset(ATTR_BLINK)) { ++ if (blinktimeout && (cursorblinks || tattrset(ATTR_BLINK))) { + timeout = blinktimeout - TIMEDIFF(now, lastblink); + if (timeout <= 0) { + if (-timeout > blinktimeout) /* start visible */ +@@ -2000,7 +2023,7 @@ main(int argc, char *argv[]) + { + xw.l = xw.t = 0; + xw.isfixed = False; +- xsetcursor(cursorshape); ++ xsetcursor(cursorstyle); + + ARGBEGIN { + case 'a': +-- +2.34.0 + diff --git a/patches/st-columns-rows-reflow-st-unpatched-new.diff b/patches/st-columns-rows-reflow-st-unpatched-new.diff @@ -0,0 +1,1529 @@ +From: João F. BeyondMagic <[email protected]> +Date: Tue, 27 Dec 2021 +Subject: [PATCH] Patch to redraw columns and rows in +case of hidden by resize. Extracted from +https://github.com/ashish-yadav11/st @ashish-yadav11 +Source: https://github.com/nimaipatel/st/blob/master/patches/columns-rows-reflow-st-unpatched-new.patch +diff --git a/st.c b/st.c +index a9338e1..e3b052d 100644 +--- a/st.c ++++ b/st.c +@@ -35,6 +35,8 @@ + #define ESC_ARG_SIZ 16 + #define STR_BUF_SIZ ESC_BUF_SIZ + #define STR_ARG_SIZ ESC_ARG_SIZ ++#define HISTSIZE 2000 ++#define RESIZEBUFFER 1000 + + /* macros */ + #define IS_SET(flag) ((term.mode & (flag)) != 0) +@@ -42,6 +44,24 @@ + #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f)) + #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c)) + #define ISDELIM(u) (u && wcschr(worddelimiters, u)) ++#define STRESCARGREST(n) ((n) == 0 ? strescseq.buf : strescseq.args[(n)-1] + 1) ++#define STRESCARGJUST(n) (*(strescseq.args[n]) = '\0', STRESCARGREST(n)) ++ ++#define TLINE(y) ( \ ++ (y) < term.scr ? term.hist[(term.histi + (y) - term.scr + 1 + HISTSIZE) % HISTSIZE] \ ++ : term.line[(y) - term.scr] \ ++) ++ ++#define TLINEABS(y) ( \ ++ (y) < 0 ? term.hist[(term.histi + (y) + 1 + HISTSIZE) % HISTSIZE] : term.line[(y)] \ ++) ++ ++#define UPDATEWRAPNEXT(alt, col) do { \ ++ if ((term.c.state & CURSOR_WRAPNEXT) && term.c.x + term.wrapcwidth[alt] < col) { \ ++ term.c.x += term.wrapcwidth[alt]; \ ++ term.c.state &= ~CURSOR_WRAPNEXT; \ ++ } \ ++} while (0); + + enum term_mode { + MODE_WRAP = 1 << 0, +@@ -53,6 +73,12 @@ enum term_mode { + MODE_UTF8 = 1 << 6, + }; + ++enum scroll_mode { ++ SCROLL_RESIZE = -1, ++ SCROLL_NOSAVEHIST = 0, ++ SCROLL_SAVEHIST = 1 ++}; ++ + enum cursor_movement { + CURSOR_SAVE, + CURSOR_LOAD +@@ -114,7 +140,11 @@ typedef struct { + int row; /* nb row */ + int col; /* nb col */ + Line *line; /* screen */ +- Line *alt; /* alternate screen */ ++ Line hist[HISTSIZE]; /* history buffer */ ++ int histi; /* history index */ ++ int histf; /* nb history available */ ++ int scr; /* scroll back */ ++ int wrapcwidth[2]; /* used in updating WRAPNEXT when resizing */ + int *dirty; /* dirtyness of lines */ + TCursor c; /* cursor */ + int ocx; /* old cursor col */ +@@ -171,26 +201,37 @@ 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 tclearregion(int, int, int, int, int); + static void tcursor(int); ++static void tclearglyph(Glyph *, int); ++static void tresetcursor(void); + static void tdeletechar(int); + static void tdeleteline(int); + static void tinsertblank(int); + static void tinsertblankline(int); +-static int tlinelen(int); ++static int tlinelen(Line len); ++static int tiswrapped(Line line); ++static char *tgetglyphs(char *, const Glyph *, const Glyph *); ++static size_t tgetline(char *, const Glyph *); + 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 tscrollup(int, int, int, int); + static void tscrolldown(int, int); ++static void treflow(int, int); ++static void rscrolldown(int); ++static void tresizedef(int, int); ++static void tresizealt(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 tloaddefscreen(int, int); ++static void tloadaltscreen(int, int); + static void tsetmode(int, int, const int *, int); + static int twrite(const char *, int, int); + static void tfulldirt(void); +@@ -204,7 +245,10 @@ static void tstrsequence(uchar); + static void drawregion(int, int, int, int); + + static void selnormalize(void); +-static void selscroll(int, int); ++static void selscroll(int, int, int); ++static void selmove(int); ++static void selremove(void); ++static int regionselected(int, int, int, int); + static void selsnap(int *, int *, int); + + static size_t utf8decode(const char *, Rune *, size_t); +@@ -412,17 +456,46 @@ selinit(void) + } + + int +-tlinelen(int y) ++tlinelen(Line line) + { +- int i = term.col; ++ int i = term.col - 1; ++ ++ for (; i >= 0 && !(line[i].mode & (ATTR_SET | ATTR_WRAP)); i--); ++ return i + 1; ++} + +- if (term.line[y][i - 1].mode & ATTR_WRAP) +- return i; ++int ++tiswrapped(Line line) ++{ ++ int len = tlinelen(line); + +- while (i > 0 && term.line[y][i - 1].u == ' ') +- --i; ++ return len > 0 && (line[len - 1].mode & ATTR_WRAP); ++} + +- return i; ++char * ++tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp) ++{ ++ while (gp <= lgp) ++ if (gp->mode & ATTR_WDUMMY) { ++ gp++; ++ } else { ++ buf += utf8encode((gp++)->u, buf); ++ } ++ return buf; ++} ++ ++size_t ++tgetline(char *buf, const Glyph *fgp) ++{ ++ char *ptr; ++ const Glyph *lgp = &fgp[term.col - 1]; ++ ++ while (lgp > fgp && !(lgp->mode & (ATTR_SET | ATTR_WRAP))) ++ lgp--; ++ ptr = tgetglyphs(buf, fgp, lgp); ++ if (!(lgp->mode & ATTR_WRAP)) ++ *(ptr++) = '\n'; ++ return ptr - buf; + } + + void +@@ -462,10 +535,11 @@ selextend(int col, int row, int type, int done) + + sel.oe.x = col; + sel.oe.y = row; +- selnormalize(); + sel.type = type; ++ selnormalize(); + +- if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY) ++ 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; +@@ -489,46 +563,53 @@ selnormalize(void) + selsnap(&sel.nb.x, &sel.nb.y, -1); + selsnap(&sel.ne.x, &sel.ne.y, +1); + +- /* expand selection over line breaks */ ++ /* expand selection over line breaks */ + if (sel.type == SEL_RECTANGULAR) + return; +- i = tlinelen(sel.nb.y); +- if (i < sel.nb.x) ++ ++ i = tlinelen(TLINE(sel.nb.y)); ++ if (sel.nb.x > i) + sel.nb.x = i; +- if (tlinelen(sel.ne.y) <= sel.ne.x) +- sel.ne.x = term.col - 1; ++ if (sel.ne.x >= tlinelen(TLINE(sel.ne.y))) ++ sel.ne.x = term.col - 1; + } + + int +-selected(int x, int y) ++regionselected(int x1, int y1, int x2, int y2) + { +- if (sel.mode == SEL_EMPTY || sel.ob.x == -1 || +- sel.alt != IS_SET(MODE_ALTSCREEN)) ++ if (sel.ob.x == -1 || sel.mode == SEL_EMPTY || ++ sel.alt != IS_SET(MODE_ALTSCREEN) || sel.nb.y > y2 || sel.ne.y < y1) + 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 (sel.type == SEL_RECTANGULAR) ? sel.nb.x <= x2 && sel.ne.x >= x1 ++ : (sel.nb.y != y2 || sel.nb.x <= x2) && ++ (sel.ne.y != y1 || sel.ne.x >= x1); ++} + +- 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); ++int ++selected(int x, int y) ++{ ++ return regionselected(x, y, x, y); + } + + void + selsnap(int *x, int *y, int direction) + { + int newx, newy, xt, yt; ++ int rtop = 0, rbot = term.row - 1; + int delim, prevdelim; + const Glyph *gp, *prevgp; + ++ if (!IS_SET(MODE_ALTSCREEN)) ++ rtop += -term.histf + term.scr, rbot += term.scr; ++ + 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]; ++ prevgp = &TLINE(*y)[*x]; + prevdelim = ISDELIM(prevgp->u); + for (;;) { + newx = *x + direction; +@@ -536,24 +617,24 @@ selsnap(int *x, int *y, int direction) + if (!BETWEEN(newx, 0, term.col - 1)) { + newy += direction; + newx = (newx + term.col) % term.col; +- if (!BETWEEN(newy, 0, term.row - 1)) ++ if (!BETWEEN(newy, rtop, rbot)) + break; + + if (direction > 0) + 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)) ++ if (newx >= tlinelen(TLINE(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))) ++ if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim || ++ (delim && !(gp->u == ' ' && prevgp->u == ' ')))) + break; + + *x = newx; +@@ -570,18 +651,14 @@ 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 +- & ATTR_WRAP)) { ++ for (; *y > rtop; *y -= 1) { ++ if (!tiswrapped(TLINE(*y-1))) + break; +- } + } + } else if (direction > 0) { +- for (; *y < term.row-1; *y += direction) { +- if (!(term.line[*y][term.col-1].mode +- & ATTR_WRAP)) { ++ for (; *y < rbot; *y += 1) { ++ if (!tiswrapped(TLINE(*y))) + break; +- } + } + } + break; +@@ -592,40 +669,34 @@ char * + getsel(void) + { + char *str, *ptr; +- int y, bufsize, lastx, linelen; +- const Glyph *gp, *last; ++ int y, lastx, linelen; ++ const Glyph *gp, *lgp; + +- if (sel.ob.x == -1) ++ if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN)) + return NULL; + +- bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ; +- ptr = str = xmalloc(bufsize); ++ str = xmalloc((term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ); ++ ptr = str; + + /* append every set & selected glyph to the selection */ + for (y = sel.nb.y; y <= sel.ne.y; y++) { +- if ((linelen = tlinelen(y)) == 0) { ++ Line line = TLINE(y); ++ ++ if ((linelen = tlinelen(line)) == 0) { + *ptr++ = '\n'; + continue; + } + + if (sel.type == SEL_RECTANGULAR) { +- gp = &term.line[y][sel.nb.x]; ++ gp = &line[sel.nb.x]; + lastx = sel.ne.x; + } else { +- gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0]; ++ gp = &line[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); +- } ++ lgp = &line[MIN(lastx, linelen-1)]; + ++ ptr = tgetglyphs(ptr, gp, lgp); + /* + * Copy and pasting of line endings is inconsistent + * in the inconsistent terminal and GUI world. +@@ -636,10 +707,10 @@ getsel(void) + * FIXME: Fix the computer world. + */ + if ((y < sel.ne.y || lastx >= linelen) && +- (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR)) ++ (!(lgp->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR)) + *ptr++ = '\n'; + } +- *ptr = 0; ++ *ptr = '\0'; + return str; + } + +@@ -648,9 +719,15 @@ selclear(void) + { + if (sel.ob.x == -1) + return; ++ selremove(); ++ tsetdirt(sel.nb.y, sel.ne.y); ++} ++ ++void ++selremove(void) ++{ + sel.mode = SEL_IDLE; + sel.ob.x = -1; +- tsetdirt(sel.nb.y, sel.ne.y); + } + + void +@@ -852,6 +929,7 @@ ttywrite(const char *s, size_t n, int may_echo) + { + const char *next; + ++ kscrolldown(&((Arg){ .i = term.scr })); + if (may_echo && IS_SET(MODE_ECHO)) + twrite(s, n, 1); + +@@ -987,7 +1065,7 @@ tsetdirtattr(int attr) + 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); ++ term.dirty[i] = 1; + break; + } + } +@@ -997,7 +1075,8 @@ tsetdirtattr(int attr) + void + tfulldirt(void) + { +- tsetdirt(0, term.row-1); ++ for (int i = 0; i < term.row; i++) ++ term.dirty[i] = 1; + } + + void +@@ -1014,110 +1093,259 @@ tcursor(int mode) + } + } + ++void ++tresetcursor(void) ++{ ++ term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg }, ++ .x = 0, .y = 0, .state = CURSOR_DEFAULT }; ++} ++ + void + treset(void) + { + uint i; ++ int x, y; + +- term.c = (TCursor){{ +- .mode = ATTR_NULL, +- .fg = defaultfg, +- .bg = defaultbg +- }, .x = 0, .y = 0, .state = CURSOR_DEFAULT}; ++ tresetcursor(); + + 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.histf = 0; ++ term.scr = 0; + term.bot = term.row - 1; + term.mode = MODE_WRAP|MODE_UTF8; + memset(term.trantbl, CS_USA, sizeof(term.trantbl)); + term.charset = 0; + ++ selremove(); + for (i = 0; i < 2; i++) { +- tmoveto(0, 0); +- tcursor(CURSOR_SAVE); +- tclearregion(0, 0, term.col-1, term.row-1); ++ tcursor(CURSOR_SAVE); /* reset saved cursor */ ++ for (y = 0; y < term.row; y++) ++ for (x = 0; x < term.col; x++) ++ tclearglyph(&term.line[y][x], 0); + tswapscreen(); + } ++ tfulldirt(); + } + + void + tnew(int col, int row) + { +- term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } }; +- tresize(col, row); +- treset(); ++ int i, j; ++ ++ for (i = 0; i < 2; i++) { ++ term.line = xmalloc(row * sizeof(Line)); ++ for (j = 0; j < row; j++) ++ term.line[j] = xmalloc(col * sizeof(Glyph)); ++ term.col = col, term.row = row; ++ tswapscreen(); ++ } ++ term.dirty = xmalloc(row * sizeof(*term.dirty)); ++ term.tabs = xmalloc(col * sizeof(*term.tabs)); ++ for (i = 0; i < HISTSIZE; i++) ++ term.hist[i] = xmalloc(col * sizeof(Glyph)); ++ treset(); + } + ++/* handle it with care */ + void + tswapscreen(void) + { +- Line *tmp = term.line; ++ static Line *altline; ++ static int altcol, altrow; ++ Line *tmpline = term.line; ++ int tmpcol = term.col, tmprow = term.row; + +- term.line = term.alt; +- term.alt = tmp; ++ term.line = altline; ++ term.col = altcol, term.row = altrow; ++ altline = tmpline; ++ altcol = tmpcol, altrow = tmprow; + term.mode ^= MODE_ALTSCREEN; ++} ++ ++void ++tloaddefscreen(int clear, int loadcursor) ++{ ++ int col, row, alt = IS_SET(MODE_ALTSCREEN); ++ ++ if (alt) { ++ if (clear) ++ tclearregion(0, 0, term.col-1, term.row-1, 1); ++ col = term.col, row = term.row; ++ tswapscreen(); ++ } ++ if (loadcursor) ++ tcursor(CURSOR_LOAD); ++ if (alt) ++ tresizedef(col, row); ++} ++ ++void ++tloadaltscreen(int clear, int savecursor) ++{ ++ int col, row, def = !IS_SET(MODE_ALTSCREEN); ++ ++ if (savecursor) ++ tcursor(CURSOR_SAVE); ++ if (def) { ++ col = term.col, row = term.row; ++ tswapscreen(); ++ term.scr = 0; ++ tresizealt(col, row); ++ } ++ if (clear) ++ tclearregion(0, 0, term.col-1, term.row-1, 1); ++} ++ ++int ++tisaltscreen(void) ++{ ++ return IS_SET(MODE_ALTSCREEN); ++} ++ ++void ++kscrolldown(const Arg* a) ++{ ++ int n = a->i; ++ ++ if (!term.scr || IS_SET(MODE_ALTSCREEN)) ++ return; ++ ++ if (n < 0) ++ n = MAX(term.row / -n, 1); ++ ++ if (n <= term.scr) { ++ term.scr -= n; ++ } else { ++ n = term.scr; ++ term.scr = 0; ++ } ++ ++ if (sel.ob.x != -1 && !sel.alt) ++ selmove(-n); /* negate change in term.scr */ + tfulldirt(); + } + + void +-tscrolldown(int orig, int n) ++kscrollup(const Arg* a) + { +- int i; ++ int n = a->i; ++ ++ if (!term.histf || IS_SET(MODE_ALTSCREEN)) ++ return; ++ ++ if (n < 0) ++ n = MAX(term.row / -n, 1); ++ ++ if (term.scr + n <= term.histf) { ++ term.scr += n; ++ } else { ++ n = term.histf - term.scr; ++ term.scr = term.histf; ++ } ++ ++ if (sel.ob.x != -1 && !sel.alt) ++ selmove(n); /* negate change in term.scr */ ++ tfulldirt(); ++} ++ ++void ++tscrolldown(int top, int n) ++{ ++ int i, bot = term.bot; + Line temp; + +- LIMIT(n, 0, term.bot-orig+1); ++ if (n <= 0) ++ return; ++ n = MIN(n, bot-top+1); + +- tsetdirt(orig, term.bot-n); +- tclearregion(0, term.bot-n+1, term.col-1, term.bot); ++ tsetdirt(top, bot-n); ++ tclearregion(0, bot-n+1, term.col-1, bot, 1); + +- for (i = term.bot; i >= orig+n; i--) { ++ for (i = bot; i >= top+n; i--) { + temp = term.line[i]; + term.line[i] = term.line[i-n]; + term.line[i-n] = temp; + } + +- selscroll(orig, n); ++ if (sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN)) ++ selscroll(top, bot, n); + } + + void +-tscrollup(int orig, int n) ++tscrollup(int top, int bot, int n, int mode) + { +- int i; ++ int i, j, s; ++ int alt = IS_SET(MODE_ALTSCREEN); ++ int savehist = !alt && top == 0 && mode != SCROLL_NOSAVEHIST; + Line temp; + +- LIMIT(n, 0, term.bot-orig+1); ++ if (n <= 0) ++ return; ++ n = MIN(n, bot-top+1); ++ ++ if (savehist) { ++ for (i = 0; i < n; i++) { ++ term.histi = (term.histi + 1) % HISTSIZE; ++ temp = term.hist[term.histi]; ++ for (j = 0; j < term.col; j++) ++ tclearglyph(&temp[j], 1); ++ term.hist[term.histi] = term.line[i]; ++ term.line[i] = temp; ++ } ++ term.histf = MIN(term.histf + n, HISTSIZE); ++ s = n; ++ if (term.scr) { ++ j = term.scr; ++ term.scr = MIN(j + n, HISTSIZE); ++ s = j + n - term.scr; ++ } ++ if (mode != SCROLL_RESIZE) ++ tfulldirt(); ++ } else { ++ tclearregion(0, top, term.col-1, top+n-1, 1); ++ tsetdirt(top+n, bot); ++ } + +- tclearregion(0, orig, term.col-1, orig+n-1); +- tsetdirt(orig+n, term.bot); + +- for (i = orig; i <= term.bot-n; i++) { ++ for (i = top; i <= bot-n; i++) { + temp = term.line[i]; + term.line[i] = term.line[i+n]; + term.line[i+n] = temp; + } + +- selscroll(orig, -n); ++ if (sel.ob.x != -1 && sel.alt == alt) { ++ if (!savehist) { ++ selscroll(top, bot, -n); ++ } else if (s > 0) { ++ selmove(-s); ++ if (-term.scr + sel.nb.y < -term.histf) ++ selremove(); ++ } ++ } + } + + void +-selscroll(int orig, int n) ++selmove(int n) + { +- if (sel.ob.x == -1) +- return; ++ sel.ob.y += n, sel.nb.y += n; ++ sel.oe.y += n, sel.ne.y += n; ++} ++ ++void ++selscroll(int top, int bot, int n) ++{ ++ /* turn absolute coordinates into relative */ ++ top += term.scr, bot += term.scr; + +- if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) { ++ if (BETWEEN(sel.nb.y, top, bot) != BETWEEN(sel.ne.y, top, 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) { ++ } else if (BETWEEN(sel.nb.y, top, bot)) { ++ selmove(n); ++ if (sel.nb.y < top || sel.ne.y > bot) + selclear(); +- } else { +- selnormalize(); +- } + } + } + +@@ -1127,7 +1355,7 @@ tnewline(int first_col) + int y = term.c.y; + + if (y == term.bot) { +- tscrollup(term.top, 1); ++ tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST); + } else { + y++; + } +@@ -1217,75 +1445,79 @@ tsetchar(Rune u, const Glyph *attr, int x, int y) + } 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; ++ term.line[y][x].mode |= ATTR_SET; + } + + void +-tclearregion(int x1, int y1, int x2, int y2) ++tclearglyph(Glyph *gp, int usecurattr) + { +- int x, y, temp; +- Glyph *gp; ++ if (usecurattr) { ++ gp->fg = term.c.attr.fg; ++ gp->bg = term.c.attr.bg; ++ } else { ++ gp->fg = defaultfg; ++ gp->bg = defaultbg; ++ } ++ gp->mode = ATTR_NULL; ++ gp->u = ' '; ++} + +- if (x1 > x2) +- temp = x1, x1 = x2, x2 = temp; +- if (y1 > y2) +- temp = y1, y1 = y2, y2 = temp; ++void ++tclearregion(int x1, int y1, int x2, int y2, int usecurattr) ++{ ++ int x, y; + +- LIMIT(x1, 0, term.col-1); +- LIMIT(x2, 0, term.col-1); +- LIMIT(y1, 0, term.row-1); +- LIMIT(y2, 0, term.row-1); ++ /* regionselected() takes relative coordinates */ ++ if (regionselected(x1+term.scr, y1+term.scr, x2+term.scr, y2+term.scr)) ++ selremove(); + + 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 = ' '; +- } ++ for (x = x1; x <= x2; x++) ++ tclearglyph(&term.line[y][x], usecurattr); + } + } + + void + tdeletechar(int n) + { +- int dst, src, size; +- Glyph *line; +- +- LIMIT(n, 0, term.col - term.c.x); ++ int src, dst, size; ++ Line line; + ++ if (n <= 0) ++ return; + dst = term.c.x; +- src = term.c.x + n; ++ src = MIN(term.c.x + n, term.col); + 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); ++ if (size > 0) { /* otherwise src would point beyond the array ++ https://stackoverflow.com/questions/29844298 */ ++ line = term.line[term.c.y]; ++ memmove(&line[dst], &line[src], size * sizeof(Glyph)); ++ } ++ tclearregion(dst + size, term.c.y, term.col - 1, term.c.y, 1); + } + + void + tinsertblank(int n) + { +- int dst, src, size; +- Glyph *line; +- +- LIMIT(n, 0, term.col - term.c.x); ++ int src, dst, size; ++ Line line; + +- dst = term.c.x + n; ++ if (n <= 0) ++ return; ++ dst = MIN(term.c.x + n, term.col); + 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); ++ if (size > 0) { /* otherwise dst would point beyond the array */ ++ line = term.line[term.c.y]; ++ memmove(&line[dst], &line[src], size * sizeof(Glyph)); ++ } ++ tclearregion(src, term.c.y, dst - 1, term.c.y, 1); + } + + void +@@ -1299,7 +1531,7 @@ void + tdeleteline(int n) + { + if (BETWEEN(term.c.y, term.top, term.bot)) +- tscrollup(term.c.y, n); ++ tscrollup(term.c.y, term.bot, n, SCROLL_NOSAVEHIST); + } + + int32_t +@@ -1473,7 +1705,7 @@ tsetscroll(int t, int b) + void + tsetmode(int priv, int set, const int *args, int narg) + { +- int alt; const int *lim; ++ const int *lim; + + for (lim = args + narg; args < lim; ++args) { + if (priv) { +@@ -1534,25 +1766,18 @@ tsetmode(int priv, int set, const int *args, int narg) + 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: ++ case 1047: /* swap screen, clearing alternate screen */ + 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 */ ++ if (set) ++ tloadaltscreen(*args == 1049, *args == 1049); ++ else ++ tloaddefscreen(*args == 1047, *args == 1049); ++ break; + case 1048: ++ if (!allowaltscreen) ++ break; + tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD); + break; + case 2004: /* 2004: bracketed paste mode */ +@@ -1604,7 +1829,7 @@ void + csihandle(void) + { + char buf[40]; +- int len; ++ int n, x; + + switch (csiescseq.mode[0]) { + default: +@@ -1702,20 +1927,30 @@ csihandle(void) + 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); ++ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1); + if (term.c.y < term.row-1) { +- tclearregion(0, term.c.y+1, term.col-1, +- term.row-1); ++ tclearregion(0, term.c.y+1, term.col-1, term.row-1, 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); ++ if (term.c.y >= 1) ++ tclearregion(0, 0, term.col-1, term.c.y-1, 1); ++ tclearregion(0, term.c.y, term.c.x, term.c.y, 1); + break; + case 2: /* all */ +- tclearregion(0, 0, term.col-1, term.row-1); +- break; ++ if (IS_SET(MODE_ALTSCREEN)) { ++ tclearregion(0, 0, term.col-1, term.row-1, 1); ++ break; ++ } ++ /* vte does this: ++ tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */ ++ ++ /* alacritty does this: */ ++ for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--); ++ if (n >= 0) ++ tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST); ++ tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST); ++ break; + default: + goto unknown; + } +@@ -1723,20 +1958,20 @@ csihandle(void) + 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); ++ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1); + break; + case 1: /* left */ +- tclearregion(0, term.c.y, term.c.x, term.c.y); ++ tclearregion(0, term.c.y, term.c.x, term.c.y, 1); + break; + case 2: /* all */ +- tclearregion(0, term.c.y, term.col-1, term.c.y); ++ tclearregion(0, term.c.y, term.col-1, term.c.y, 1); + break; + } + break; + case 'S': /* SU -- Scroll <n> line up */ + DEFAULT(csiescseq.arg[0], 1); +- tscrollup(term.top, csiescseq.arg[0]); ++ /* xterm, urxvt, alacritty save this in history */ ++ tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST); + break; + case 'T': /* SD -- Scroll <n> line down */ + DEFAULT(csiescseq.arg[0], 1); +@@ -1754,9 +1989,11 @@ csihandle(void) + tdeleteline(csiescseq.arg[0]); + break; + case 'X': /* ECH -- Erase <n> char */ ++ if (csiescseq.arg[0] < 0) ++ return; + DEFAULT(csiescseq.arg[0], 1); +- tclearregion(term.c.x, term.c.y, +- term.c.x + csiescseq.arg[0] - 1, term.c.y); ++ x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1; ++ tclearregion(term.c.x, term.c.y, x, term.c.y, 1); + break; + case 'P': /* DCH -- Delete <n> char */ + DEFAULT(csiescseq.arg[0], 1); +@@ -1778,9 +2015,9 @@ csihandle(void) + break; + case 'n': /* DSR – Device Status Report (cursor position) */ + if (csiescseq.arg[0] == 6) { +- len = snprintf(buf, sizeof(buf), "\033[%i;%iR", ++ n = snprintf(buf, sizeof(buf), "\033[%i;%iR", + term.c.y+1, term.c.x+1); +- ttywrite(buf, len, 0); ++ ttywrite(buf, n, 0); + } + break; + case 'r': /* DECSTBM -- Set Scrolling Region */ +@@ -1849,29 +2086,30 @@ strhandle(void) + int j, narg, par; + + term.esc &= ~(ESC_STR_END|ESC_STR); +- strparse(); +- par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0; ++ strescseq.buf[strescseq.len] = '\0'; + + switch (strescseq.type) { + case ']': /* OSC -- Operating System Command */ ++ strparse(); ++ par = (narg = strescseq.narg) ? atoi(STRESCARGJUST(0)) : 0; + switch (par) { + case 0: + if (narg > 1) { +- xsettitle(strescseq.args[1]); +- xseticontitle(strescseq.args[1]); ++ xsettitle(STRESCARGREST(1)); ++ xseticontitle(STRESCARGREST(1)); + } + return; + case 1: + if (narg > 1) +- xseticontitle(strescseq.args[1]); ++ xseticontitle(STRESCARGREST(1)); + return; + case 2: + if (narg > 1) +- xsettitle(strescseq.args[1]); ++ xsettitle(STRESCARGREST(1)); + return; + case 52: + if (narg > 2 && allowwindowops) { +- dec = base64dec(strescseq.args[2]); ++ dec = base64dec(STRESCARGREST(1)); + if (dec) { + xsetsel(dec); + xclipcopy(); +@@ -1883,10 +2121,10 @@ strhandle(void) + case 4: /* color set */ + if (narg < 3) + break; +- p = strescseq.args[2]; ++ p = STRESCARGREST(2); + /* FALLTHROUGH */ + case 104: /* color reset, here p = NULL */ +- j = (narg > 1) ? atoi(strescseq.args[1]) : -1; ++ j = (narg > 1) ? atoi(STRESCARGREST(1)) : -1; + if (xsetcolorname(j, p)) { + if (par == 104 && narg <= 1) + return; /* color reset without parameter */ +@@ -1903,7 +2141,7 @@ strhandle(void) + } + break; + case 'k': /* old title set compatibility */ +- xsettitle(strescseq.args[0]); ++ xsettitle(STRESCARGREST(0)); + return; + case 'P': /* DCS -- Device Control String */ + case '_': /* APC -- Application Program Command */ +@@ -1922,19 +2160,18 @@ strparse(void) + 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; ++ p++; ++ strescseq.args[strescseq.narg++] = p; + if (c == '\0') + return; +- *p++ = '\0'; +- } ++ p++; ++ } + } + + void +@@ -2022,16 +2259,8 @@ tdumpsel(void) + 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); ++ char str[(term.col + 1) * UTF_SIZ]; ++ tprinter(str, tgetline(str, &term.line[n][0])); + } + + void +@@ -2252,7 +2481,7 @@ eschandle(uchar ascii) + return 0; + case 'D': /* IND -- Linefeed */ + if (term.c.y == term.bot) { +- tscrollup(term.top, 1); ++ tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST); + } else { + tmoveto(term.c.x, term.c.y+1); + } +@@ -2405,7 +2634,8 @@ check_control_code: + */ + return; + } +- if (selected(term.c.x, term.c.y)) ++ /* selected() takes relative coordinates */ ++ if (selected(term.c.x + term.scr, term.c.y + term.scr)) + selclear(); + + gp = &term.line[term.c.y][term.c.x]; +@@ -2436,6 +2666,7 @@ check_control_code: + if (term.c.x+width < term.col) { + tmoveto(term.c.x+width, term.c.y); + } else { ++ term.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width; + term.c.state |= CURSOR_WRAPNEXT; + } + } +@@ -2473,85 +2704,275 @@ twrite(const char *buf, int buflen, int show_ctrl) + } + + void +-tresize(int col, int row) ++treflow(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; ++ int i, j; ++ int oce, nce, bot, scr; ++ int ox = 0, oy = -term.histf, nx = 0, ny = -1, len; ++ int cy = -1; /* proxy for new y coordinate of cursor */ ++ int nlines; ++ Line *buf, line; ++ ++ /* y coordinate of cursor line end */ ++ for (oce = term.c.y; oce < term.row - 1 && ++ tiswrapped(term.line[oce]); oce++); ++ ++ nlines = term.histf + oce + 1; ++ if (col < term.col) { ++ /* each line can take this many lines after reflow */ ++ j = (term.col + col - 1) / col; ++ nlines = j * nlines; ++ if (nlines > HISTSIZE + RESIZEBUFFER + row) { ++ nlines = HISTSIZE + RESIZEBUFFER + row; ++ oy = -(nlines / j - oce - 1); ++ } + } ++ buf = xmalloc(nlines * sizeof(Line)); ++ do { ++ if (!nx) ++ buf[++ny] = xmalloc(col * sizeof(Glyph)); ++ if (!ox) { ++ line = TLINEABS(oy); ++ len = tlinelen(line); ++ } ++ if (oy == term.c.y) { ++ if (!ox) ++ len = MAX(len, term.c.x + 1); ++ /* update cursor */ ++ if (cy < 0 && term.c.x - ox < col - nx) { ++ term.c.x = nx + term.c.x - ox, cy = ny; ++ UPDATEWRAPNEXT(0, col); ++ } ++ } ++ /* get reflowed lines in buf */ ++ if (col - nx > len - ox) { ++ memcpy(&buf[ny][nx], &line[ox], (len-ox) * sizeof(Glyph)); ++ nx += len - ox; ++ if (len == 0 || !(line[len - 1].mode & ATTR_WRAP)) { ++ for (j = nx; j < col; j++) ++ tclearglyph(&buf[ny][j], 0); ++ nx = 0; ++ } else if (nx > 0) { ++ buf[ny][nx - 1].mode &= ~ATTR_WRAP; ++ } ++ ox = 0, oy++; ++ } else if (col - nx == len - ox) { ++ memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph)); ++ ox = 0, oy++, nx = 0; ++ } else/* if (col - nx < len - ox) */ { ++ memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph)); ++ ox += col - nx; ++ buf[ny][col - 1].mode |= ATTR_WRAP; ++ nx = 0; ++ } ++ } while (oy <= oce); ++ if (nx) ++ for (j = nx; j < col; j++) ++ tclearglyph(&buf[ny][j], 0); + +- /* +- * 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 extra lines */ ++ 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)); ++ ++ bot = MIN(ny, row - 1); ++ scr = MAX(row - term.row, 0); ++ /* update y coordinate of cursor line end */ ++ nce = MIN(oce + scr, bot); ++ /* update cursor y coordinate */ ++ term.c.y = nce - (ny - cy); ++ if (term.c.y < 0) { ++ j = nce, nce = MIN(nce + -term.c.y, bot); ++ term.c.y += nce - j; ++ while (term.c.y < 0) { ++ free(buf[ny--]); ++ term.c.y++; ++ } + } +- /* 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)); ++ /* allocate new rows */ ++ for (i = row - 1; i > nce; i--) { ++ term.line[i] = xmalloc(col * sizeof(Glyph)); ++ for (j = 0; j < col; j++) ++ tclearglyph(&term.line[i][j], 0); + } +- for (i += row; i < term.row; i++) { ++ /* fill visible area */ ++ for (/*i = nce */; i >= term.row; i--, ny--) ++ term.line[i] = buf[ny]; ++ for (/*i = term.row - 1 */; i >= 0; i--, ny--) { + free(term.line[i]); +- free(term.alt[i]); ++ term.line[i] = buf[ny]; + } ++ /* fill lines in history buffer and update term.histf */ ++ for (/*i = -1 */; ny >= 0 && i >= -HISTSIZE; i--, ny--) { ++ j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE; ++ free(term.hist[j]); ++ term.hist[j] = buf[ny]; ++ } ++ term.histf = -i - 1; ++ term.scr = MIN(term.scr, term.histf); ++ /* resize rest of the history lines */ ++ for (/*i = -term.histf - 1 */; i >= -HISTSIZE; i--) { ++ j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE; ++ term.hist[j] = xrealloc(term.hist[j], col * sizeof(Glyph)); ++ } ++ free(buf); ++} + +- /* 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)); ++void ++rscrolldown(int n) ++{ ++ int i; ++ Line temp; + +- /* 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)); +- } ++ /* can never be true as of now ++ if (IS_SET(MODE_ALTSCREEN)) ++ return; */ + +- /* 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 ((n = MIN(n, term.histf)) <= 0) ++ return; ++ ++ for (i = term.c.y + n; i >= n; i--) { ++ temp = term.line[i]; ++ term.line[i] = term.line[i-n]; ++ term.line[i-n] = temp; + } ++ for (/*i = n - 1 */; i >= 0; i--) { ++ temp = term.line[i]; ++ term.line[i] = term.hist[term.histi]; ++ term.hist[term.histi] = temp; ++ term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE; ++ } ++ term.c.y += n; ++ term.histf -= n; ++ if ((i = term.scr - n) >= 0) { ++ term.scr = i; ++ } else { ++ term.scr = 0; ++ if (sel.ob.x != -1 && !sel.alt) ++ selmove(-i); ++ } ++} ++ ++void ++tresize(int col, int row) ++{ ++ int *bp; ++ ++ /* col and row are always MAX(_, 1) ++ if (col < 1 || row < 1) { ++ fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row); ++ return; ++ } */ ++ ++ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); ++ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); + 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 (IS_SET(MODE_ALTSCREEN)) ++ tresizealt(col, row); ++ else ++ tresizedef(col, row); ++} ++ ++void ++tresizedef(int col, int row) ++{ ++ int i, j; ++ ++ /* return if dimensions haven't changed */ ++ if (term.col == col && term.row == row) { ++ tfulldirt(); ++ return; ++ } ++ if (col != term.col) { ++ if (!sel.alt) ++ selremove(); ++ treflow(col, row); ++ } else { ++ /* slide screen up if otherwise cursor would get out of the screen */ ++ if (term.c.y >= row) { ++ tscrollup(0, term.row - 1, term.c.y - row + 1, SCROLL_RESIZE); ++ term.c.y = row - 1; + } +- if (0 < col && minrow < row) { +- tclearregion(0, minrow, col - 1, row - 1); ++ for (i = row; i < term.row; i++) ++ free(term.line[i]); ++ ++ /* resize to new height */ ++ term.line = xrealloc(term.line, row * sizeof(Line)); ++ /* allocate any new rows */ ++ for (i = term.row; i < row; i++) { ++ term.line[i] = xmalloc(col * sizeof(Glyph)); ++ for (j = 0; j < col; j++) ++ tclearglyph(&term.line[i][j], 0); + } +- tswapscreen(); +- tcursor(CURSOR_LOAD); ++ /* scroll down as much as height has increased */ ++ rscrolldown(row - term.row); ++ } ++ /* update terminal size */ ++ term.col = col, term.row = row; ++ /* reset scrolling region */ ++ term.top = 0, term.bot = row - 1; ++ /* dirty all lines */ ++ tfulldirt(); ++} ++ ++void ++tresizealt(int col, int row) ++{ ++ int i, j; ++ ++ /* return if dimensions haven't changed */ ++ if (term.col == col && term.row == row) { ++ tfulldirt(); ++ return; + } +- term.c = c; ++ if (sel.alt) ++ selremove(); ++ /* slide screen up if otherwise cursor would get out of the screen */ ++ for (i = 0; i <= term.c.y - row; i++) ++ free(term.line[i]); ++ if (i > 0) { ++ /* ensure that both src and dst are not NULL */ ++ memmove(term.line, term.line + i, row * sizeof(Line)); ++ term.c.y = row - 1; ++ } ++ for (i += row; i < term.row; i++) ++ free(term.line[i]); ++ /* resize to new height */ ++ term.line = xrealloc(term.line, row * sizeof(Line)); ++ /* resize to new width */ ++ for (i = 0; i < MIN(row, term.row); i++) { ++ term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); ++ for (j = term.col; j < col; j++) ++ tclearglyph(&term.line[i][j], 0); ++ } ++ /* allocate any new rows */ ++ for (/*i = MIN(row, term.row) */; i < row; i++) { ++ term.line[i] = xmalloc(col * sizeof(Glyph)); ++ for (j = 0; j < col; j++) ++ tclearglyph(&term.line[i][j], 0); ++ } ++ /* update cursor */ ++ if (term.c.x >= col) { ++ term.c.state &= ~CURSOR_WRAPNEXT; ++ term.c.x = col - 1; ++ } else { ++ UPDATEWRAPNEXT(1, col); ++ } ++ /* update terminal size */ ++ term.col = col, term.row = row; ++ /* reset scrolling region */ ++ term.top = 0, term.bot = row - 1; ++ /* dirty all lines */ ++ tfulldirt(); + } + + void +@@ -2570,7 +2991,7 @@ 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); + } + } + +diff --git a/st.h b/st.h +index fa2eddf..5b3ea8c 100644 +--- a/st.h ++++ b/st.h +@@ -21,18 +21,20 @@ + #define IS_TRUECOL(x) (1 << 24 & (x)) + + enum glyph_attribute { +- ATTR_NULL = 0, +- ATTR_BOLD = 1 << 0, +- ATTR_FAINT = 1 << 1, +- ATTR_ITALIC = 1 << 2, +- ATTR_UNDERLINE = 1 << 3, +- ATTR_BLINK = 1 << 4, +- ATTR_REVERSE = 1 << 5, +- ATTR_INVISIBLE = 1 << 6, +- ATTR_STRUCK = 1 << 7, +- ATTR_WRAP = 1 << 8, +- ATTR_WIDE = 1 << 9, +- ATTR_WDUMMY = 1 << 10, ++ ATTR_NULL = 0, ++ ATTR_SET = 1 << 0, ++ ATTR_BOLD = 1 << 1, ++ ATTR_FAINT = 1 << 2, ++ ATTR_ITALIC = 1 << 3, ++ ATTR_UNDERLINE = 1 << 4, ++ ATTR_BLINK = 1 << 5, ++ ATTR_REVERSE = 1 << 6, ++ ATTR_INVISIBLE = 1 << 7, ++ ATTR_STRUCK = 1 << 8, ++ ATTR_WRAP = 1 << 9, ++ ATTR_WIDE = 1 << 10, ++ ATTR_WDUMMY = 1 << 11, ++ ATTR_SELECTED = 1 << 12, + ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT, + }; + +@@ -81,6 +83,8 @@ 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 *); +@@ -88,6 +92,7 @@ void toggleprinter(const Arg *); + + int tattrset(int); + void tnew(int, int); ++int tisaltscreen(void); + void tresize(int, int); + void tsetdirtattr(int); + void ttyhangup(void); diff --git a/patches/st-dynamic-cursor-color-0.8.4.diff b/patches/st-dynamic-cursor-color-0.8.4.diff @@ -0,0 +1,52 @@ +From 01e706efbc13194a4a4404e91b93a9638a3c1bea Mon Sep 17 00:00:00 2001 +From: Kipras Melnikovas <[email protected]> +Date: Thu, 25 Feb 2021 14:31:26 +0200 +Subject: [PATCH] refactor dynamic-cursor-color patch + +Signed-off-by: Kipras Melnikovas <[email protected]> +--- + x.c | 19 +++++++++++++++++-- + 1 file changed, 17 insertions(+), 2 deletions(-) + +diff --git a/x.c b/x.c +index 120e495..ab66364 100644 +--- a/x.c ++++ b/x.c +@@ -1489,6 +1489,7 @@ void + xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) + { + Color drawcol; ++ XRenderColor colbg; + + /* remove the old cursor */ + if (selected(ox, oy)) +@@ -1518,10 +1519,24 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) + g.fg = defaultfg; + g.bg = defaultrcs; + } else { ++ /** this is the main part of the dynamic cursor color patch */ ++ g.bg = g.fg; + g.fg = defaultbg; +- g.bg = defaultcs; + } +- drawcol = dc.col[g.bg]; ++ ++ /** ++ * and this is the second part of the dynamic cursor color patch. ++ * it handles the `drawcol` variable ++ */ ++ if (IS_TRUECOL(g.bg)) { ++ colbg.alpha = 0xffff; ++ colbg.red = TRUERED(g.bg); ++ colbg.green = TRUEGREEN(g.bg); ++ colbg.blue = TRUEBLUE(g.bg); ++ XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &drawcol); ++ } else { ++ drawcol = dc.col[g.bg]; ++ } + } + + /* draw the new one */ +-- +2.30.1 + diff --git a/patches/st-focus-20200731-43a395a.diff b/patches/st-focus-20200731-43a395a.diff @@ -0,0 +1,271 @@ +From 10fa2b6aebceb3a12219ef25376297b063638bd9 Mon Sep 17 00:00:00 2001 +From: Julius Huelsmann <[email protected]> +Date: Fri, 31 Jul 2020 10:13:35 +0200 +Subject: [PATCH] patch: focus + +--- + config.def.h | 5 ++++ + config.mk | 2 +- + st.c | 1 - + st.h | 2 ++ + x.c | 72 +++++++++++++++++++++++++++++++++++++++------------- + 5 files changed, 62 insertions(+), 20 deletions(-) + +diff --git a/config.def.h b/config.def.h +index 0895a1f..577d1f1 100644 +--- a/config.def.h ++++ b/config.def.h +@@ -84,6 +84,9 @@ char *termname = "st-256color"; + */ + unsigned int tabspaces = 8; + ++/* bg opacity */ ++float alpha = 0.8, alphaUnfocused = 0.6; ++ + /* Terminal colors (16 first used in escape sequence) */ + static const char *colorname[] = { + /* 8 normal colors */ +@@ -111,6 +114,7 @@ static const char *colorname[] = { + /* more colors can be added after 255 to use with DefaultXX */ + "#cccccc", + "#555555", ++ "black", + }; + + +@@ -122,6 +126,7 @@ unsigned int defaultfg = 7; + unsigned int defaultbg = 0; + static unsigned int defaultcs = 256; + static unsigned int defaultrcs = 257; ++unsigned int bg = 17, bgUnfocused = 16; + + /* + * Default shape of cursor +diff --git a/config.mk b/config.mk +index beafc35..ddc65ae 100644 +--- a/config.mk ++++ b/config.mk +@@ -16,7 +16,7 @@ PKG_CONFIG = pkg-config + INCS = -I$(X11INC) \ + `$(PKG_CONFIG) --cflags fontconfig` \ + `$(PKG_CONFIG) --cflags freetype2` +-LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \ ++LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft -lXrender\ + `$(PKG_CONFIG) --libs fontconfig` \ + `$(PKG_CONFIG) --libs freetype2` + +diff --git a/st.c b/st.c +index 0ce6ac2..c7f40c8 100644 +--- a/st.c ++++ b/st.c +@@ -194,7 +194,6 @@ static void tsetscroll(int, int); + static void tswapscreen(void); + static void tsetmode(int, int, 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); +diff --git a/st.h b/st.h +index d978458..44cb3fd 100644 +--- a/st.h ++++ b/st.h +@@ -79,6 +79,7 @@ typedef union { + + void die(const char *, ...); + void redraw(void); ++void tfulldirt(void); + void draw(void); + + void printscreen(const Arg *); +@@ -122,3 +123,4 @@ extern char *termname; + extern unsigned int tabspaces; + extern unsigned int defaultfg; + extern unsigned int defaultbg; ++extern float alpha, alphaUnfocused; +diff --git a/x.c b/x.c +index e5f1737..a2e820f 100644 +--- a/x.c ++++ b/x.c +@@ -105,6 +105,7 @@ typedef struct { + XSetWindowAttributes attrs; + int scr; + int isfixed; /* is fixed geometry? */ ++ int depth; /* bit depth */ + int l, t; /* left and top offset */ + int gm; /* geometry mask */ + } XWindow; +@@ -243,6 +244,7 @@ static char *usedfont = NULL; + static double usedfontsize = 0; + static double defaultfontsize = 0; + ++static char *opt_alpha = NULL; + static char *opt_class = NULL; + static char **opt_cmd = NULL; + static char *opt_embed = NULL; +@@ -252,6 +254,8 @@ static char *opt_line = NULL; + static char *opt_name = NULL; + static char *opt_title = NULL; + ++static int focused = 0; ++ + static int oldbutton = 3; /* button event on startup: 3 = release */ + + void +@@ -734,7 +738,7 @@ xresize(int col, int row) + + XFreePixmap(xw.dpy, xw.buf); + xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, +- DefaultDepth(xw.dpy, xw.scr)); ++ xw.depth); + XftDrawChange(xw.draw, xw.buf); + xclear(0, 0, win.w, win.h); + +@@ -772,28 +776,38 @@ xloadcolor(int i, const char *name, Color *ncolor) + return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor); + } + ++void ++xloadalpha(void) ++{ ++ float const usedAlpha = focused ? alpha : alphaUnfocused; ++ if (opt_alpha) alpha = strtof(opt_alpha, NULL); ++ dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * usedAlpha); ++ dc.col[defaultbg].pixel &= 0x00FFFFFF; ++ dc.col[defaultbg].pixel |= (unsigned char)(0xff * usedAlpha) << 24; ++} ++ + void + xloadcols(void) + { +- int i; + static int loaded; + Color *cp; + +- if (loaded) { +- for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp) +- XftColorFree(xw.dpy, xw.vis, xw.cmap, cp); +- } else { +- dc.collen = MAX(LEN(colorname), 256); +- dc.col = xmalloc(dc.collen * sizeof(Color)); ++ if (!loaded) { ++ dc.collen = 1 + (defaultbg = MAX(LEN(colorname), 256)); ++ dc.col = xmalloc((dc.collen) * sizeof(Color)); + } + +- for (i = 0; i < dc.collen; i++) ++ for (int i = 0; i+1 < dc.collen; ++i) + if (!xloadcolor(i, NULL, &dc.col[i])) { + if (colorname[i]) + die("could not allocate color '%s'\n", colorname[i]); + else + die("could not allocate color %d\n", i); + } ++ if (dc.collen) // cannot die, as the color is already loaded. ++ xloadcolor(focused ?bg :bgUnfocused, NULL, &dc.col[defaultbg]); ++ ++ xloadalpha(); + loaded = 1; + } + +@@ -1103,11 +1117,23 @@ xinit(int cols, int rows) + Window parent; + pid_t thispid = getpid(); + XColor xmousefg, xmousebg; ++ XWindowAttributes attr; ++ XVisualInfo vis; + + if (!(xw.dpy = XOpenDisplay(NULL))) + die("can't open display\n"); + xw.scr = XDefaultScreen(xw.dpy); +- xw.vis = XDefaultVisual(xw.dpy, xw.scr); ++ ++ if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) { ++ parent = XRootWindow(xw.dpy, xw.scr); ++ xw.depth = 32; ++ } else { ++ XGetWindowAttributes(xw.dpy, parent, &attr); ++ xw.depth = attr.depth; ++ } ++ ++ XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis); ++ xw.vis = vis.visual; + + /* font */ + if (!FcInit()) +@@ -1117,7 +1143,7 @@ xinit(int cols, int rows) + xloadfonts(usedfont, 0); + + /* colors */ +- xw.cmap = XDefaultColormap(xw.dpy, xw.scr); ++ xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None); + xloadcols(); + + /* adjust fixed window geometry */ +@@ -1137,19 +1163,15 @@ xinit(int cols, int rows) + | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask; + xw.attrs.colormap = xw.cmap; + +- if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) +- parent = XRootWindow(xw.dpy, xw.scr); + xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t, +- win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput, ++ win.w, win.h, 0, xw.depth, InputOutput, + xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity + | CWEventMask | CWColormap, &xw.attrs); + + memset(&gcvalues, 0, sizeof(gcvalues)); + 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 = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth); ++ dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues); + XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel); + XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h); + +@@ -1730,12 +1752,22 @@ focus(XEvent *ev) + xseturgency(0); + if (IS_SET(MODE_FOCUS)) + ttywrite("\033[I", 3, 0); ++ if (!focused) { ++ focused = 1; ++ xloadcols(); ++ tfulldirt(); ++ } + } else { + if (xw.ime.xic) + XUnsetICFocus(xw.ime.xic); + win.mode &= ~MODE_FOCUSED; + if (IS_SET(MODE_FOCUS)) + ttywrite("\033[O", 3, 0); ++ if (focused) { ++ focused = 0; ++ xloadcols(); ++ tfulldirt(); ++ } + } + } + +@@ -1994,6 +2026,9 @@ main(int argc, char *argv[]) + case 'a': + allowaltscreen = 0; + break; ++ case 'A': ++ opt_alpha = EARGF(usage()); ++ break; + case 'c': + opt_class = EARGF(usage()); + break; +@@ -2045,6 +2080,7 @@ run: + XSetLocaleModifiers(""); + cols = MAX(cols, 1); + rows = MAX(rows, 1); ++ defaultbg = MAX(LEN(colorname), 256); + tnew(cols, rows); + xinit(cols, rows); + xsetenv(); +-- +2.28.0 + diff --git a/patches/st-font2-20190416-ba72400.diff b/patches/st-font2-20190416-ba72400.diff @@ -0,0 +1,167 @@ +From ba724004c6a368e452114f7dc147a9978fe0f3b4 Mon Sep 17 00:00:00 2001 +From: Kirill Bugaev <[email protected]> +Date: Tue, 16 Apr 2019 04:31:30 +0800 +Subject: [PATCH] This patch allows to add spare font besides default. Some + glyphs can be not present in default font. For this glyphs st uses + font-config and try to find them in font cache first. This patch append fonts + defined in font2 variable to the beginning of font cache. So they will be + used first for glyphs that absent in default font. + +--- + config.def.h | 6 +++ + x.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 107 insertions(+) + +diff --git a/config.def.h b/config.def.h +index 482901e..676719e 100644 +--- a/config.def.h ++++ b/config.def.h +@@ -6,6 +6,12 @@ + * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html + */ + static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true"; ++/* Spare fonts */ ++static char *font2[] = { ++/* "Inconsolata for Powerline:pixelsize=12:antialias=true:autohint=true", */ ++/* "Hack Nerd Font Mono:pixelsize=11:antialias=true:autohint=true", */ ++}; ++ + static int borderpx = 2; + + /* +diff --git a/x.c b/x.c +index 5828a3b..d37e59d 100644 +--- a/x.c ++++ b/x.c +@@ -149,6 +149,8 @@ static void xhints(void); + static int xloadcolor(int, const char *, Color *); + static int xloadfont(Font *, FcPattern *); + static void xloadfonts(char *, double); ++static int xloadsparefont(FcPattern *, int); ++static void xloadsparefonts(void); + static void xunloadfont(Font *); + static void xunloadfonts(void); + static void xsetenv(void); +@@ -296,6 +298,7 @@ zoomabs(const Arg *arg) + { + xunloadfonts(); + xloadfonts(usedfont, arg->f); ++ xloadsparefonts(); + cresize(0, 0); + redraw(); + xhints(); +@@ -977,6 +980,101 @@ xloadfonts(char *fontstr, double fontsize) + FcPatternDestroy(pattern); + } + ++int ++xloadsparefont(FcPattern *pattern, int flags) ++{ ++ FcPattern *match; ++ FcResult result; ++ ++ match = FcFontMatch(NULL, pattern, &result); ++ if (!match) { ++ return 1; ++ } ++ ++ if (!(frc[frclen].font = XftFontOpenPattern(xw.dpy, match))) { ++ FcPatternDestroy(match); ++ return 1; ++ } ++ ++ frc[frclen].flags = flags; ++ /* Believe U+0000 glyph will present in each default font */ ++ frc[frclen].unicodep = 0; ++ frclen++; ++ ++ return 0; ++} ++ ++void ++xloadsparefonts(void) ++{ ++ FcPattern *pattern; ++ double sizeshift, fontval; ++ int fc; ++ char **fp; ++ ++ if (frclen != 0) ++ die("can't embed spare fonts. cache isn't empty"); ++ ++ /* Calculate count of spare fonts */ ++ fc = sizeof(font2) / sizeof(*font2); ++ if (fc == 0) ++ return; ++ ++ /* Allocate memory for cache entries. */ ++ if (frccap < 4 * fc) { ++ frccap += 4 * fc - frccap; ++ frc = xrealloc(frc, frccap * sizeof(Fontcache)); ++ } ++ ++ for (fp = font2; fp - font2 < fc; ++fp) { ++ ++ if (**fp == '-') ++ pattern = XftXlfdParse(*fp, False, False); ++ else ++ pattern = FcNameParse((FcChar8 *)*fp); ++ ++ if (!pattern) ++ die("can't open spare font %s\n", *fp); ++ ++ if (defaultfontsize > 0) { ++ sizeshift = usedfontsize - defaultfontsize; ++ if (sizeshift != 0 && ++ FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) == ++ FcResultMatch) { ++ fontval += sizeshift; ++ FcPatternDel(pattern, FC_PIXEL_SIZE); ++ FcPatternDel(pattern, FC_SIZE); ++ FcPatternAddDouble(pattern, FC_PIXEL_SIZE, fontval); ++ } ++ } ++ ++ FcPatternAddBool(pattern, FC_SCALABLE, 1); ++ ++ FcConfigSubstitute(NULL, pattern, FcMatchPattern); ++ XftDefaultSubstitute(xw.dpy, xw.scr, pattern); ++ ++ if (xloadsparefont(pattern, FRC_NORMAL)) ++ die("can't open spare font %s\n", *fp); ++ ++ FcPatternDel(pattern, FC_SLANT); ++ FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC); ++ if (xloadsparefont(pattern, FRC_ITALIC)) ++ die("can't open spare font %s\n", *fp); ++ ++ FcPatternDel(pattern, FC_WEIGHT); ++ FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD); ++ if (xloadsparefont(pattern, FRC_ITALICBOLD)) ++ die("can't open spare font %s\n", *fp); ++ ++ FcPatternDel(pattern, FC_SLANT); ++ FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN); ++ if (xloadsparefont(pattern, FRC_BOLD)) ++ die("can't open spare font %s\n", *fp); ++ ++ FcPatternDestroy(pattern); ++ } ++} ++ + void + xunloadfont(Font *f) + { +@@ -1057,6 +1155,9 @@ xinit(int cols, int rows) + usedfont = (opt_font == NULL)? font : opt_font; + xloadfonts(usedfont, 0); + ++ /* spare fonts */ ++ xloadsparefonts(); ++ + /* colors */ + xw.cmap = XDefaultColormap(xw.dpy, xw.scr); + xloadcols(); +-- +2.21.0 + diff --git a/patches/st-hidecursor-0.8.3.diff b/patches/st-hidecursor-0.8.3.diff @@ -0,0 +1,88 @@ +diff --git a/x.c b/x.c +index e5f1737..7e759b0 100644 +--- a/x.c ++++ b/x.c +@@ -103,6 +103,11 @@ typedef struct { + Draw draw; + Visual *vis; + XSetWindowAttributes attrs; ++ /* Here, we use the term *pointer* to differentiate the cursor ++ * one sees when hovering the mouse over the terminal from, e.g., ++ * a green rectangle where text would be entered. */ ++ Cursor vpointer, bpointer; /* visible and hidden pointers */ ++ int pointerisvisible; + int scr; + int isfixed; /* is fixed geometry? */ + int l, t; /* left and top offset */ +@@ -698,6 +703,13 @@ brelease(XEvent *e) + void + bmotion(XEvent *e) + { ++ if (!xw.pointerisvisible) { ++ XDefineCursor(xw.dpy, xw.win, xw.vpointer); ++ xw.pointerisvisible = 1; ++ if (!IS_SET(MODE_MOUSEMANY)) ++ xsetpointermotion(0); ++ } ++ + if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) { + mousereport(e); + return; +@@ -1099,10 +1111,10 @@ void + xinit(int cols, int rows) + { + XGCValues gcvalues; +- Cursor cursor; + Window parent; + pid_t thispid = getpid(); + XColor xmousefg, xmousebg; ++ Pixmap blankpm; + + if (!(xw.dpy = XOpenDisplay(NULL))) + die("can't open display\n"); +@@ -1166,8 +1178,9 @@ xinit(int cols, int rows) + } + + /* white cursor, black outline */ +- cursor = XCreateFontCursor(xw.dpy, mouseshape); +- XDefineCursor(xw.dpy, xw.win, cursor); ++ xw.pointerisvisible = 1; ++ xw.vpointer = XCreateFontCursor(xw.dpy, mouseshape); ++ XDefineCursor(xw.dpy, xw.win, xw.vpointer); + + if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) { + xmousefg.red = 0xffff; +@@ -1181,7 +1194,10 @@ xinit(int cols, int rows) + xmousebg.blue = 0x0000; + } + +- XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg); ++ XRecolorCursor(xw.dpy, xw.vpointer, &xmousefg, &xmousebg); ++ blankpm = XCreateBitmapFromData(xw.dpy, xw.win, &(char){0}, 1, 1); ++ xw.bpointer = XCreatePixmapCursor(xw.dpy, blankpm, blankpm, ++ &xmousefg, &xmousebg, 0, 0); + + xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False); + xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False); +@@ -1673,6 +1689,8 @@ unmap(XEvent *ev) + void + xsetpointermotion(int set) + { ++ if (!set && !xw.pointerisvisible) ++ return; + MODBIT(xw.attrs.event_mask, set, PointerMotionMask); + XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs); + } +@@ -1793,6 +1811,12 @@ kpress(XEvent *ev) + Status status; + Shortcut *bp; + ++ if (xw.pointerisvisible) { ++ XDefineCursor(xw.dpy, xw.win, xw.bpointer); ++ xsetpointermotion(1); ++ xw.pointerisvisible = 0; ++ } ++ + if (IS_SET(MODE_KBDLOCK)) + return; + diff --git a/patches/st-xresources-signal-reloading-20220312-6685098.diff b/patches/st-xresources-signal-reloading-20220312-6685098.diff @@ -0,0 +1,165 @@ +From 6685098b4e368a750b200adda0be64198ac386a8 Mon Sep 17 00:00:00 2001 +From: MahdiMirzade <[email protected]> +Date: Sat, 12 Mar 2022 16:05:23 +0330 +Subject: [PATCH] handle st settings from Xresources + reload all st instances + by running 'pidof st | xargs kill -s USR1' + +--- + x.c | 127 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 127 insertions(+) + +diff --git a/x.c b/x.c +index cd96575..61701b5 100644 +--- a/x.c ++++ b/x.c +@@ -14,6 +14,7 @@ + #include <X11/keysym.h> + #include <X11/Xft/Xft.h> + #include <X11/XKBlib.h> ++#include <X11/Xresource.h> + + char *argv0; + #include "arg.h" +@@ -2011,6 +2012,130 @@ run(void) + } + } + ++#define XRESOURCE_LOAD_META(NAME) \ ++ if(!XrmGetResource(xrdb, "st." NAME, "st." NAME, &type, &ret)) \ ++ XrmGetResource(xrdb, "*." NAME, "*." NAME, &type, &ret); \ ++ if (ret.addr != NULL && !strncmp("String", type, 64)) ++ ++#define XRESOURCE_LOAD_STRING(NAME, DST) \ ++ XRESOURCE_LOAD_META(NAME) \ ++ DST = ret.addr; ++ ++#define XRESOURCE_LOAD_CHAR(NAME, DST) \ ++ XRESOURCE_LOAD_META(NAME) \ ++ DST = ret.addr[0]; ++ ++#define XRESOURCE_LOAD_INTEGER(NAME, DST) \ ++ XRESOURCE_LOAD_META(NAME) \ ++ DST = strtoul(ret.addr, NULL, 10); ++ ++#define XRESOURCE_LOAD_FLOAT(NAME, DST) \ ++ XRESOURCE_LOAD_META(NAME) \ ++ DST = strtof(ret.addr, NULL); ++ ++void ++xrdb_load(void) ++{ ++ /* XXX */ ++ char *xrm; ++ char *type; ++ XrmDatabase xrdb; ++ XrmValue ret; ++ Display *dpy; ++ ++ if(!(dpy = XOpenDisplay(NULL))) ++ die("Can't open display\n"); ++ ++ XrmInitialize(); ++ xrm = XResourceManagerString(dpy); ++ ++ if (xrm != NULL) { ++ xrdb = XrmGetStringDatabase(xrm); ++ ++ /* handling colors here without macros to do via loop. */ ++ int i = 0; ++ char loadValue[12] = ""; ++ for (i = 0; i < 256; i++) ++ { ++ sprintf(loadValue, "%s%d", "st.color", i); ++ ++ if(!XrmGetResource(xrdb, loadValue, loadValue, &type, &ret)) ++ { ++ sprintf(loadValue, "%s%d", "*.color", i); ++ if (!XrmGetResource(xrdb, loadValue, loadValue, &type, &ret)) ++ /* reset if not found (unless in range for defaults). */ ++ if (i > 15) ++ colorname[i] = NULL; ++ } ++ ++ if (ret.addr != NULL && !strncmp("String", type, 64)) ++ colorname[i] = ret.addr; ++ } ++ ++ XRESOURCE_LOAD_STRING("foreground", colorname[defaultfg]); ++ XRESOURCE_LOAD_STRING("background", colorname[defaultbg]); ++ XRESOURCE_LOAD_STRING("cursorfg", colorname[defaultcs]) ++ else { ++ // this looks confusing because we are chaining off of the if ++ // in the macro. probably we should be wrapping everything blocks ++ // so this isn't possible... ++ defaultcs = defaultfg; ++ } ++ XRESOURCE_LOAD_STRING("reverse-cursor", colorname[defaultrcs]) ++ else { ++ // see above. ++ defaultrcs = defaultbg; ++ } ++ ++ XRESOURCE_LOAD_STRING("font", font); ++ XRESOURCE_LOAD_STRING("termname", termname); ++ ++ /* XRESOURCE_LOAD_INTEGER("xfps", xfps); */ ++ /* XRESOURCE_LOAD_INTEGER("actionfps", actionfps); */ ++ XRESOURCE_LOAD_INTEGER("blinktimeout", blinktimeout); ++ XRESOURCE_LOAD_INTEGER("bellvolume", bellvolume); ++ XRESOURCE_LOAD_INTEGER("borderpx", borderpx); ++ /* XRESOURCE_LOAD_INTEGER("borderless", borderless); */ ++ XRESOURCE_LOAD_INTEGER("cursorshape", cursorshape); ++ ++ /* cursorblinkstate = 1; // in case if cursor shape was changed from a blinking one to a non-blinking */ ++ /* XRESOURCE_LOAD_INTEGER("cursorthickness", cursorthickness); */ ++ /* XRESOURCE_LOAD_INTEGER("cursorblinkstyle", cursorblinkstyle); */ ++ /* XRESOURCE_LOAD_INTEGER("cursorblinkontype", cursorblinkontype); */ ++ ++ /* todo: https://github.com/gnotclub/xst/commit/1e82647b0e04077e975679a4b4cf1eb02b04e6bc */ ++ /* XRESOURCE_LOAD_INTEGER("mouseScrollLines", mousescrolllines); */ ++ ++ XRESOURCE_LOAD_FLOAT("cwscale", cwscale); ++ XRESOURCE_LOAD_FLOAT("chscale", chscale); ++ ++ /* XRESOURCE_LOAD_CHAR("prompt_char", prompt_char); */ ++ ++ } ++ XFlush(dpy); ++} ++ ++void ++reload(int sig) ++{ ++ xrdb_load(); ++ ++ /* colors, fonts */ ++ xloadcols(); ++ xunloadfonts(); ++ xloadfonts(font, 0); ++ ++ /* pretend the window just got resized */ ++ cresize(win.w, win.h); ++ ++ redraw(); ++ ++ /* triggers re-render if we're visible. */ ++ ttywrite("\033[O", 3, 1); ++ ++ signal(SIGUSR1, reload); ++} ++ + void + usage(void) + { +@@ -2084,6 +2209,8 @@ run: + + setlocale(LC_CTYPE, ""); + XSetLocaleModifiers(""); ++ xrdb_load(); ++ signal(SIGUSR1, reload); + cols = MAX(cols, 1); + rows = MAX(rows, 1); + tnew(cols, rows); +-- +2.35.1 + diff --git a/st.1 b/st.1 @@ -0,0 +1,177 @@ +.TH ST 1 st\-VERSION +.SH NAME +st \- simple terminal +.SH SYNOPSIS +.B st +.RB [ \-aiv ] +.RB [ \-c +.IR class ] +.RB [ \-f +.IR font ] +.RB [ \-g +.IR geometry ] +.RB [ \-n +.IR name ] +.RB [ \-o +.IR iofile ] +.RB [ \-T +.IR title ] +.RB [ \-t +.IR title ] +.RB [ \-l +.IR line ] +.RB [ \-w +.IR windowid ] +.RB [[ \-e ] +.IR command +.RI [ arguments ...]] +.PP +.B st +.RB [ \-aiv ] +.RB [ \-c +.IR class ] +.RB [ \-f +.IR font ] +.RB [ \-g +.IR geometry ] +.RB [ \-n +.IR name ] +.RB [ \-o +.IR iofile ] +.RB [ \-T +.IR title ] +.RB [ \-t +.IR title ] +.RB [ \-w +.IR windowid ] +.RB \-l +.IR line +.RI [ stty_args ...] +.SH DESCRIPTION +.B st +is a simple terminal emulator. +.SH OPTIONS +.TP +.B \-a +disable alternate screens in terminal +.TP +.BI \-c " class" +defines the window class (default $TERM). +.TP +.BI \-f " font" +defines the +.I font +to use when st is run. +.TP +.BI \-g " geometry" +defines the X11 geometry string. +The form is [=][<cols>{xX}<rows>][{+-}<xoffset>{+-}<yoffset>]. See +.BR XParseGeometry (3) +for further details. +.TP +.B \-i +will fixate the position given with the -g option. +.TP +.BI \-n " name" +defines the window instance name (default $TERM). +.TP +.BI \-o " iofile" +writes all the I/O to +.I iofile. +This feature is useful when recording st sessions. A value of "-" means +standard output. +.TP +.BI \-T " title" +defines the window title (default 'st'). +.TP +.BI \-t " title" +defines the window title (default 'st'). +.TP +.BI \-w " windowid" +embeds st within the window identified by +.I windowid +.TP +.BI \-l " line" +use a tty +.I line +instead of a pseudo terminal. +.I line +should be a (pseudo-)serial device (e.g. /dev/ttyS0 on Linux for serial port +0). +When this flag is given +remaining arguments are used as flags for +.BR stty(1). +By default st initializes the serial line to 8 bits, no parity, 1 stop bit +and a 38400 baud rate. The speed is set by appending it as last argument +(e.g. 'st -l /dev/ttyS0 115200'). Arguments before the last one are +.BR stty(1) +flags. If you want to set odd parity on 115200 baud use for example 'st -l +/dev/ttyS0 parenb parodd 115200'. Set the number of bits by using for +example 'st -l /dev/ttyS0 cs7 115200'. See +.BR stty(1) +for more arguments and cases. +.TP +.B \-v +prints version information to stderr, then exits. +.TP +.BI \-e " command " [ " arguments " "... ]" +st executes +.I command +instead of the shell. If this is used it +.B must be the last option +on the command line, as in xterm / rxvt. +This option is only intended for compatibility, +and all the remaining arguments are used as a command +even without it. +.SH SHORTCUTS +.TP +.B Break +Send a break in the serial line. +Break key is obtained in PC keyboards +pressing at the same time control and pause. +.TP +.B Ctrl-Print Screen +Toggle if st should print to the +.I iofile. +.TP +.B Shift-Print Screen +Print the full screen to the +.I iofile. +.TP +.B Print Screen +Print the selection to the +.I iofile. +.TP +.B Ctrl-Shift-Page Up +Increase font size. +.TP +.B Ctrl-Shift-Page Down +Decrease font size. +.TP +.B Ctrl-Shift-Home +Reset to default font size. +.TP +.B Ctrl-Shift-y +Paste from primary selection (middle mouse button). +.TP +.B Ctrl-Shift-c +Copy the selected text to the clipboard selection. +.TP +.B Ctrl-Shift-v +Paste from the clipboard selection. +.SH CUSTOMIZATION +.B st +can be customized by creating a custom config.h and (re)compiling the source +code. This keeps it fast, secure and simple. +.SH AUTHORS +See the LICENSE file for the authors. +.SH LICENSE +See the LICENSE file for the terms of redistribution. +.SH SEE ALSO +.BR tabbed (1), +.BR utmp (1), +.BR stty (1), +.BR scroll (1) +.SH BUGS +See the TODO file in the distribution. + diff --git a/st.c b/st.c @@ -0,0 +1,3112 @@ +/* See LICENSE for license details. */ +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <pwd.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <signal.h> +#include <sys/ioctl.h> +#include <sys/select.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <termios.h> +#include <unistd.h> +#include <wchar.h> + +#include "st.h" +#include "win.h" + +#if defined(__linux) + #include <pty.h> +#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__) + #include <util.h> +#elif defined(__FreeBSD__) || defined(__DragonFly__) + #include <libutil.h> +#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 +#define HISTSIZE 2000 +#define RESIZEBUFFER 1000 + +/* 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)) +#define STRESCARGREST(n) ((n) == 0 ? strescseq.buf : strescseq.args[(n)-1] + 1) +#define STRESCARGJUST(n) (*(strescseq.args[n]) = '\0', STRESCARGREST(n)) + +#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \ + term.scr + HISTSIZE + 1) % HISTSIZE] : \ + term.line[(y) - term.scr]) + +#define TLINEABS(y) ((y) < 0 ? term.hist[(term.histi + (y) \ + + 1 + HISTSIZE) % HISTSIZE] : term.line[(y)]) + +#define UPDATEWRAPNEXT(alt, col) do { \ + if ((term.c.state & CURSOR_WRAPNEXT) && term.c.x + term.wrapcwidth[alt] < col) { \ + term.c.x += term.wrapcwidth[alt]; \ + term.c.state &= ~CURSOR_WRAPNEXT; \ + } \ +} while (0); + +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 scroll_mode { + SCROLL_RESIZE = -1, + SCROLL_NOSAVEHIST = 0, + SCROLL_SAVEHIST = 1 +}; + +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 hist[HISTSIZE]; /* history buffer */ + int histi; /* history index */ + int histf; /* nb history available */ + int scr; /* scroll back */ + int wrapcwidth[2]; /* used in updating WRAPNEXT when resizing */ + 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 '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */ +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 [[ [<priv>] <arg> [;]] <mode>] 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 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, int); +static void tcursor(int); +static void tclearglyph(Glyph *, int); +static void tresetcursor(void); +static void tdeletechar(int); +static void tdeleteline(int); +static void tinsertblank(int); +static void tinsertblankline(int); +static int tlinelen(Line len); +static int tiswrapped(Line line); +static char *tgetglyphs(char *, const Glyph *, const Glyph *); +static size_t tgetline(char *, const Glyph *); +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, int, int); +static void tscrolldown(int, int); +static void treflow(int, int); +static void rscrolldown(int); +static void tresizedef(int, int); +static void tresizealt(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 tloaddefscreen(int, int); +static void tloadaltscreen(int, int); +static void tsetmode(int, int, const int *, int); +static int twrite(const char *, int, int); +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, int); +static void selmove(int); +static void selremove(void); +static int regionselected(int, int, 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; +} + +static const char base64_digits[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +char +base64dec_getc(const char **src) +{ + while (**src && !isprint(**src)) + (*src)++; + return **src ? *((*src)++) : '='; /* emulate padding if string ends */ +} + +char * +base64dec(const char *src) +{ + size_t in_len = strlen(src); + char *result, *dst; + + 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(Line line) +{ + int i = term.col - 1; + + for (; i >= 0 && !(line[i].mode & (ATTR_SET | ATTR_WRAP)); i--); + return i + 1; +} + +int +tiswrapped(Line line) +{ + int len = tlinelen(line); + + return len > 0 && (line[len - 1].mode & ATTR_WRAP); +} + +char * +tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp) +{ + while (gp <= lgp) + if (gp->mode & ATTR_WDUMMY) { + gp++; + } else { + buf += utf8encode((gp++)->u, buf); + } + return buf; +} + +size_t +tgetline(char *buf, const Glyph *fgp) +{ + char *ptr; + const Glyph *lgp = &fgp[term.col - 1]; + + while (lgp > fgp && !(lgp->mode & (ATTR_SET | ATTR_WRAP))) + lgp--; + ptr = tgetglyphs(buf, fgp, lgp); + if (!(lgp->mode & ATTR_WRAP)) + *(ptr++) = '\n'; + return ptr - buf; +} + +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; + sel.type = type; + selnormalize(); + + 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(TLINE(sel.nb.y)); + if (sel.nb.x > i) + sel.nb.x = i; + if (sel.ne.x >= tlinelen(TLINE(sel.ne.y))) + sel.ne.x = term.col - 1; +} + +int +regionselected(int x1, int y1, int x2, int y2) +{ + if (sel.ob.x == -1 || sel.mode == SEL_EMPTY || + sel.alt != IS_SET(MODE_ALTSCREEN) || sel.nb.y > y2 || sel.ne.y < y1) + return 0; + + return (sel.type == SEL_RECTANGULAR) ? sel.nb.x <= x2 && sel.ne.x >= x1 + : (sel.nb.y != y2 || sel.nb.x <= x2) && + (sel.ne.y != y1 || sel.ne.x >= x1); +} + +int +selected(int x, int y) +{ + return regionselected(x, y, x, y); +} + +void +selsnap(int *x, int *y, int direction) +{ + int newx, newy, xt, yt; + int rtop = 0, rbot = term.row - 1; + int delim, prevdelim; + const Glyph *gp, *prevgp; + + if (!IS_SET(MODE_ALTSCREEN)) + rtop += -term.histf + term.scr, rbot += term.scr; + + switch (sel.snap) { + case SNAP_WORD: + /* + * Snap around if the word wraps around at the end or + * beginning of a line. + */ + prevgp = &TLINE(*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, rtop, rbot)) + break; + + if (direction > 0) + yt = *y, xt = *x; + else + yt = newy, xt = newx; + if (!(TLINE(yt)[xt].mode & ATTR_WRAP)) + break; + } + + if (newx >= tlinelen(TLINE(newy))) + break; + + gp = &TLINE(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 > rtop; *y -= 1) { + if (!tiswrapped(TLINE(*y-1))) + break; + } + } else if (direction > 0) { + for (; *y < rbot; *y += 1) { + if (!tiswrapped(TLINE(*y))) + break; + } + } + break; + } +} + +char * +getsel(void) +{ + char *str, *ptr; + int y, lastx, linelen; + const Glyph *gp, *lgp; + + if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN)) + return NULL; + + str = xmalloc((term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ); + ptr = str; + + /* append every set & selected glyph to the selection */ + for (y = sel.nb.y; y <= sel.ne.y; y++) { + Line line = TLINE(y); + + if ((linelen = tlinelen(line)) == 0) { + *ptr++ = '\n'; + continue; + } + + if (sel.type == SEL_RECTANGULAR) { + gp = &line[sel.nb.x]; + lastx = sel.ne.x; + } else { + gp = &line[sel.nb.y == y ? sel.nb.x : 0]; + lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1; + } + lgp = &line[MIN(lastx, linelen-1)]; + + ptr = tgetglyphs(ptr, gp, lgp); + /* + * 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) && + (!(lgp->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR)) + *ptr++ = '\n'; + } + *ptr = '\0'; + return str; +} + +void +selclear(void) +{ + if (sel.ob.x == -1) + return; + selremove(); + tsetdirt(sel.nb.y, sel.ne.y); +} + +void +selremove(void) +{ + sel.mode = SEL_IDLE; + sel.ob.x = -1; +} + +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; + Arg arg = (Arg) { .i = term.scr }; + + kscrolldown(&arg); + + kscrolldown(&((Arg){ .i = term.scr })); + 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() +{ + /* 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) { + term.dirty[i] = 1; + break; + } + } + } +} + +void +tfulldirt(void) +{ + for (int i = 0; i < term.row; i++) + term.dirty[i] = 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 +tresetcursor(void) +{ + term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg }, + .x = 0, .y = 0, .state = CURSOR_DEFAULT }; +} + +void +treset(void) +{ + uint i; + int x, y; + + tresetcursor(); + + 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.histf = 0; + term.scr = 0; + term.bot = term.row - 1; + term.mode = MODE_WRAP|MODE_UTF8; + memset(term.trantbl, CS_USA, sizeof(term.trantbl)); + term.charset = 0; + + selremove(); + for (i = 0; i < 2; i++) { + tcursor(CURSOR_SAVE); /* reset saved cursor */ + for (y = 0; y < term.row; y++) + for (x = 0; x < term.col; x++) + tclearglyph(&term.line[y][x], 0); + tswapscreen(); + } + tfulldirt(); +} + +void +tnew(int col, int row) +{ + int i, j; + + for (i = 0; i < 2; i++) { + term.line = xmalloc(row * sizeof(Line)); + for (j = 0; j < row; j++) + term.line[j] = xmalloc(col * sizeof(Glyph)); + term.col = col, term.row = row; + tswapscreen(); + } + term.dirty = xmalloc(row * sizeof(*term.dirty)); + term.tabs = xmalloc(col * sizeof(*term.tabs)); + for (i = 0; i < HISTSIZE; i++) + term.hist[i] = xmalloc(col * sizeof(Glyph)); + treset(); +} + +/* handle it with care */ +void +tswapscreen(void) +{ + static Line *altline; + static int altcol, altrow; + Line *tmpline = term.line; + int tmpcol = term.col, tmprow = term.row; + + term.line = altline; + term.col = altcol, term.row = altrow; + altline = tmpline; + altcol = tmpcol, altrow = tmprow; + term.mode ^= MODE_ALTSCREEN; +} + +void +tloaddefscreen(int clear, int loadcursor) +{ + int col, row, alt = IS_SET(MODE_ALTSCREEN); + + if (alt) { + if (clear) + tclearregion(0, 0, term.col-1, term.row-1, 1); + col = term.col, row = term.row; + tswapscreen(); + } + if (loadcursor) + tcursor(CURSOR_LOAD); + if (alt) + tresizedef(col, row); +} + +void +tloadaltscreen(int clear, int savecursor) +{ + int col, row, def = !IS_SET(MODE_ALTSCREEN); + + if (savecursor) + tcursor(CURSOR_SAVE); + if (def) { + col = term.col, row = term.row; + tswapscreen(); + term.scr = 0; + tresizealt(col, row); + } + if (clear) + tclearregion(0, 0, term.col-1, term.row-1, 1); +} + +int +tisaltscreen(void) +{ + return IS_SET(MODE_ALTSCREEN); +} + +void +kscrolldown(const Arg* a) +{ + int n = a->i; + + if (!term.scr || IS_SET(MODE_ALTSCREEN)) + return; + + if (n < 0) + n = MAX(term.row / -n, 1); + + if (n <= term.scr) { + term.scr -= n; + } else { + n = term.scr; + term.scr = 0; + } + + if (sel.ob.x != -1 && !sel.alt) + selmove(-n); /* negate change in term.scr */ + tfulldirt(); +} + +void +kscrollup(const Arg* a) +{ + int n = a->i; + + if (!term.histf || IS_SET(MODE_ALTSCREEN)) + return; + + if (n < 0) + n = MAX(term.row / -n, 1); + + if (term.scr + n <= term.histf) { + term.scr += n; + } else { + n = term.histf - term.scr; + term.scr = term.histf; + } + + if (sel.ob.x != -1 && !sel.alt) + selmove(n); /* negate change in term.scr */ + tfulldirt(); +} + +void +tscrolldown(int top, int n) +{ + int i, bot = term.bot; + Line temp; + + if (n <= 0) + return; + n = MIN(n, bot-top+1); + + tsetdirt(top, bot-n); + tclearregion(0, bot-n+1, term.col-1, bot, 1); + + for (i = bot; i >= top+n; i--) { + temp = term.line[i]; + term.line[i] = term.line[i-n]; + term.line[i-n] = temp; + } + + if (sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN)) + selscroll(top, bot, n); +} + +void +tscrollup(int top, int bot, int n, int mode) +{ + int i, j, s; + int alt = IS_SET(MODE_ALTSCREEN); + int savehist = !alt && top == 0 && mode != SCROLL_NOSAVEHIST; + Line temp; + + if (n <= 0) + return; + n = MIN(n, bot-top+1); + + if (savehist) { + for (i = 0; i < n; i++) { + term.histi = (term.histi + 1) % HISTSIZE; + temp = term.hist[term.histi]; + for (j = 0; j < term.col; j++) + tclearglyph(&temp[j], 1); + term.hist[term.histi] = term.line[i]; + term.line[i] = temp; + } + term.histf = MIN(term.histf + n, HISTSIZE); + s = n; + if (term.scr) { + j = term.scr; + term.scr = MIN(j + n, HISTSIZE); + s = j + n - term.scr; + } + if (mode != SCROLL_RESIZE) + tfulldirt(); + } else { + tclearregion(0, top, term.col-1, top+n-1, 1); + tsetdirt(top+n, bot); + } + + + for (i = top; i <= bot-n; i++) { + temp = term.line[i]; + term.line[i] = term.line[i+n]; + term.line[i+n] = temp; + } + + if (sel.ob.x != -1 && sel.alt == alt) { + if (!savehist) { + selscroll(top, bot, -n); + } else if (s > 0) { + selmove(-s); + if (-term.scr + sel.nb.y < -term.histf) + selremove(); + } + } +} + +void +selmove(int n) +{ + sel.ob.y += n, sel.nb.y += n; + sel.oe.y += n, sel.ne.y += n; +} + +void +selscroll(int top, int bot, int n) +{ + /* turn absolute coordinates into relative */ + top += term.scr, bot += term.scr; + + if (BETWEEN(sel.nb.y, top, bot) != BETWEEN(sel.ne.y, top, bot)) { + selclear(); + } else if (BETWEEN(sel.nb.y, top, bot)) { + selmove(n); + if (sel.nb.y < top || sel.ne.y > bot) + selclear(); + } +} + +void +tnewline(int first_col) +{ + int y = term.c.y; + + if (y == term.bot) { + tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST); + } else { + y++; + } + tmoveto(first_col ? 0 : term.c.x, y); +} + +void +csiparse(void) +{ + char *p = csiescseq.buf, *np; + long int v; + + 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 (*p != ';' || 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; + term.line[y][x].mode |= ATTR_SET; +} + +void +tclearglyph(Glyph *gp, int usecurattr) +{ + if (usecurattr) { + gp->fg = term.c.attr.fg; + gp->bg = term.c.attr.bg; + } else { + gp->fg = defaultfg; + gp->bg = defaultbg; + } + gp->mode = ATTR_NULL; + gp->u = ' '; +} + +void +tclearregion(int x1, int y1, int x2, int y2, int usecurattr) +{ + int x, y; + + /* regionselected() takes relative coordinates */ + if (regionselected(x1+term.scr, y1+term.scr, x2+term.scr, y2+term.scr)) + selremove(); + + for (y = y1; y <= y2; y++) { + term.dirty[y] = 1; + for (x = x1; x <= x2; x++) + tclearglyph(&term.line[y][x], usecurattr); + } +} + +void +tdeletechar(int n) +{ + int src, dst, size; + Line line; + + if (n <= 0) + return; + dst = term.c.x; + src = MIN(term.c.x + n, term.col); + size = term.col - src; + if (size > 0) { /* otherwise src would point beyond the array + https://stackoverflow.com/questions/29844298 */ + line = term.line[term.c.y]; + memmove(&line[dst], &line[src], size * sizeof(Glyph)); + } + tclearregion(dst + size, term.c.y, term.col - 1, term.c.y, 1); +} + +void +tinsertblank(int n) +{ + int src, dst, size; + Line line; + + if (n <= 0) + return; + dst = MIN(term.c.x + n, term.col); + src = term.c.x; + size = term.col - dst; + if (size > 0) { /* otherwise dst would point beyond the array */ + line = term.line[term.c.y]; + memmove(&line[dst], &line[src], size * sizeof(Glyph)); + } + tclearregion(src, term.c.y, dst - 1, term.c.y, 1); +} + +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, term.bot, n, SCROLL_NOSAVEHIST); +} + +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) +{ + 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 */ + case 47: /* swap screen */ + case 1047: /* swap screen, clearing alternate screen */ + if (!allowaltscreen) + break; + if (set) + tloadaltscreen(*args == 1049, *args == 1049); + else + tloaddefscreen(*args == 1047, *args == 1049); + break; + case 1048: + if (!allowaltscreen) + break; + 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 n, x; + + switch (csiescseq.mode[0]) { + default: + unknown: + fprintf(stderr, "erresc: unknown csi "); + csidump(); + /* die(""); */ + break; + case '@': /* ICH -- Insert <n> blank char */ + DEFAULT(csiescseq.arg[0], 1); + tinsertblank(csiescseq.arg[0]); + break; + case 'A': /* CUU -- Cursor <n> Up */ + DEFAULT(csiescseq.arg[0], 1); + tmoveto(term.c.x, term.c.y-csiescseq.arg[0]); + break; + case 'B': /* CUD -- Cursor <n> Down */ + case 'e': /* VPR --Cursor <n> 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 <n> more times */ + DEFAULT(csiescseq.arg[0], 1); + if (term.lastc) + while (csiescseq.arg[0]-- > 0) + tputc(term.lastc); + break; + case 'C': /* CUF -- Cursor <n> Forward */ + case 'a': /* HPR -- Cursor <n> Forward */ + DEFAULT(csiescseq.arg[0], 1); + tmoveto(term.c.x+csiescseq.arg[0], term.c.y); + break; + case 'D': /* CUB -- Cursor <n> Backward */ + DEFAULT(csiescseq.arg[0], 1); + tmoveto(term.c.x-csiescseq.arg[0], term.c.y); + break; + case 'E': /* CNL -- Cursor <n> Down and first col */ + DEFAULT(csiescseq.arg[0], 1); + tmoveto(0, term.c.y+csiescseq.arg[0]); + break; + case 'F': /* CPL -- Cursor <n> 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 <col> */ + case '`': /* HPA */ + DEFAULT(csiescseq.arg[0], 1); + tmoveto(csiescseq.arg[0]-1, term.c.y); + break; + case 'H': /* CUP -- Move to <row> <col> */ + 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 <n> 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, 1); + if (term.c.y < term.row-1) { + tclearregion(0, term.c.y+1, term.col-1, term.row-1, 1); + } + break; + case 1: /* above */ + if (term.c.y >= 1) + tclearregion(0, 0, term.col-1, term.c.y-1, 1); + tclearregion(0, term.c.y, term.c.x, term.c.y, 1); + break; + case 2: /* all */ + if (IS_SET(MODE_ALTSCREEN)) { + tclearregion(0, 0, term.col-1, term.row-1, 1); + break; + } + /* vte does this: + tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */ + + /* alacritty does this: */ + for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--); + if (n >= 0) + tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST); + tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST); + 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, 1); + break; + case 1: /* left */ + tclearregion(0, term.c.y, term.c.x, term.c.y, 1); + break; + case 2: /* all */ + tclearregion(0, term.c.y, term.col-1, term.c.y, 1); + break; + } + break; + case 'S': /* SU -- Scroll <n> line up */ + DEFAULT(csiescseq.arg[0], 1); + /* xterm, urxvt, alacritty save this in history */ + tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST); + break; + case 'T': /* SD -- Scroll <n> line down */ + DEFAULT(csiescseq.arg[0], 1); + tscrolldown(term.top, csiescseq.arg[0]); + break; + case 'L': /* IL -- Insert <n> 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 <n> lines */ + DEFAULT(csiescseq.arg[0], 1); + tdeleteline(csiescseq.arg[0]); + break; + case 'X': /* ECH -- Erase <n> char */ + if (csiescseq.arg[0] < 0) + return; + DEFAULT(csiescseq.arg[0], 1); + x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1; + tclearregion(term.c.x, term.c.y, x, term.c.y, 1); + break; + case 'P': /* DCH -- Delete <n> char */ + DEFAULT(csiescseq.arg[0], 1); + tdeletechar(csiescseq.arg[0]); + break; + case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */ + DEFAULT(csiescseq.arg[0], 1); + tputtab(-csiescseq.arg[0]); + break; + case 'd': /* VPA -- Move to <row> */ + 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 (cursor position) */ + if (csiescseq.arg[0] == 6) { + n = snprintf(buf, sizeof(buf), "\033[%i;%iR", + term.c.y+1, term.c.x+1); + ttywrite(buf, n, 0); + } + 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 +osc4_color_response(int num) +{ + int n; + char buf[32]; + unsigned char r, g, b; + + if (xgetcolor(num, &r, &g, &b)) { + fprintf(stderr, "erresc: failed to fetch osc4 color %d\n", num); + return; + } + + n = snprintf(buf, sizeof buf, "\033]4;%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", + num, r, r, g, g, b, b); + + ttywrite(buf, n, 1); +} + +void +osc_color_response(int index, int num) +{ + int n; + char buf[32]; + unsigned char r, g, b; + + if (xgetcolor(index, &r, &g, &b)) { + fprintf(stderr, "erresc: failed to fetch osc color %d\n", index); + return; + } + + n = snprintf(buf, sizeof buf, "\033]%d;rgb:%02x%02x/%02x%02x/%02x%02x\007", + num, r, r, g, g, b, b); + + ttywrite(buf, n, 1); +} + +void +strhandle(void) +{ + char *p = NULL, *dec; + int j, narg, par; + + term.esc &= ~(ESC_STR_END|ESC_STR); + strescseq.buf[strescseq.len] = '\0'; + + switch (strescseq.type) { + case ']': /* OSC -- Operating System Command */ + strparse(); + par = (narg = strescseq.narg) ? atoi(STRESCARGJUST(0)) : 0; + switch (par) { + case 0: + if (narg > 1) { + xsettitle(STRESCARGREST(1)); + xseticontitle(STRESCARGREST(1)); + } + return; + case 1: + if (narg > 1) + xseticontitle(STRESCARGREST(1)); + return; + case 2: + if (narg > 1) + xsettitle(STRESCARGREST(1)); + return; + case 52: + if (narg > 2 && allowwindowops) { + dec = base64dec(STRESCARGREST(1)); + if (dec) { + xsetsel(dec); + xclipcopy(); + } else { + fprintf(stderr, "erresc: invalid base64\n"); + } + } + return; + case 10: + if (narg < 2) + break; + + p = strescseq.args[1]; + + if (!strcmp(p, "?")) + osc_color_response(defaultfg, 10); + else if (xsetcolorname(defaultfg, p)) + fprintf(stderr, "erresc: invalid foreground color: %s\n", p); + else + tfulldirt(); + return; + case 11: + if (narg < 2) + break; + + p = strescseq.args[1]; + + if (!strcmp(p, "?")) + osc_color_response(defaultbg, 11); + else if (xsetcolorname(defaultbg, p)) + fprintf(stderr, "erresc: invalid background color: %s\n", p); + else + tfulldirt(); + return; + case 12: + if (narg < 2) + break; + + p = strescseq.args[1]; + + if (!strcmp(p, "?")) + osc_color_response(defaultcs, 12); + else if (xsetcolorname(defaultcs, p)) + fprintf(stderr, "erresc: invalid cursor color: %s\n", p); + else + tfulldirt(); + return; + case 4: /* color set */ + if (narg < 3) + break; + p = STRESCARGREST(2); + /* FALLTHROUGH */ + case 104: /* color reset */ + j = (narg > 1) ? atoi(STRESCARGREST(1)) : -1; + + if (p && !strcmp(p, "?")) + osc4_color_response(j); + else if (xsetcolorname(j, p)) { + if (par == 104 && narg <= 1) + 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(STRESCARGREST(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; + + if (*p == '\0') + return; + + while (strescseq.narg < STR_ARG_SIZ) { + while ((c = *p) != ';' && c != '\0') + p++; + strescseq.args[strescseq.narg++] = p; + if (c == '\0') + return; + p++; + } +} + +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 str[(term.col + 1) * UTF_SIZ]; + tprinter(str, tgetline(str, &term.line[n][0])); +} + +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, term.bot, 1, SCROLL_SAVEHIST); + } 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(); + 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) { + 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; + } + /* selected() takes relative coordinates */ + if (selected(term.c.x + term.scr, term.c.y + term.scr)) + 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)); + + if (term.c.x+width > term.col) { + tnewline(1); + 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.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width; + 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 +treflow(int col, int row) +{ + int i, j; + int oce, nce, bot, scr; + int ox = 0, oy = -term.histf, nx = 0, ny = -1, len; + int cy = -1; /* proxy for new y coordinate of cursor */ + int nlines; + Line *buf, line; + + /* y coordinate of cursor line end */ + for (oce = term.c.y; oce < term.row - 1 && + tiswrapped(term.line[oce]); oce++); + + nlines = term.histf + oce + 1; + if (col < term.col) { + /* each line can take this many lines after reflow */ + j = (term.col + col - 1) / col; + nlines = j * nlines; + if (nlines > HISTSIZE + RESIZEBUFFER + row) { + nlines = HISTSIZE + RESIZEBUFFER + row; + oy = -(nlines / j - oce - 1); + } + } + buf = xmalloc(nlines * sizeof(Line)); + do { + if (!nx) + buf[++ny] = xmalloc(col * sizeof(Glyph)); + if (!ox) { + line = TLINEABS(oy); + len = tlinelen(line); + } + if (oy == term.c.y) { + if (!ox) + len = MAX(len, term.c.x + 1); + /* update cursor */ + if (cy < 0 && term.c.x - ox < col - nx) { + term.c.x = nx + term.c.x - ox, cy = ny; + UPDATEWRAPNEXT(0, col); + } + } + /* get reflowed lines in buf */ + if (col - nx > len - ox) { + memcpy(&buf[ny][nx], &line[ox], (len-ox) * sizeof(Glyph)); + nx += len - ox; + if (len == 0 || !(line[len - 1].mode & ATTR_WRAP)) { + for (j = nx; j < col; j++) + tclearglyph(&buf[ny][j], 0); + nx = 0; + } else if (nx > 0) { + buf[ny][nx - 1].mode &= ~ATTR_WRAP; + } + ox = 0, oy++; + } else if (col - nx == len - ox) { + memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph)); + ox = 0, oy++, nx = 0; + } else/* if (col - nx < len - ox) */ { + memcpy(&buf[ny][nx], &line[ox], (col-nx) * sizeof(Glyph)); + ox += col - nx; + buf[ny][col - 1].mode |= ATTR_WRAP; + nx = 0; + } + } while (oy <= oce); + if (nx) + for (j = nx; j < col; j++) + tclearglyph(&buf[ny][j], 0); + + /* free extra lines */ + for (i = row; i < term.row; i++) + free(term.line[i]); + /* resize to new height */ + term.line = xrealloc(term.line, row * sizeof(Line)); + + bot = MIN(ny, row - 1); + scr = MAX(row - term.row, 0); + /* update y coordinate of cursor line end */ + nce = MIN(oce + scr, bot); + /* update cursor y coordinate */ + term.c.y = nce - (ny - cy); + if (term.c.y < 0) { + j = nce, nce = MIN(nce + -term.c.y, bot); + term.c.y += nce - j; + while (term.c.y < 0) { + free(buf[ny--]); + term.c.y++; + } + } + /* allocate new rows */ + for (i = row - 1; i > nce; i--) { + term.line[i] = xmalloc(col * sizeof(Glyph)); + for (j = 0; j < col; j++) + tclearglyph(&term.line[i][j], 0); + } + /* fill visible area */ + for (/*i = nce */; i >= term.row; i--, ny--) + term.line[i] = buf[ny]; + for (/*i = term.row - 1 */; i >= 0; i--, ny--) { + free(term.line[i]); + term.line[i] = buf[ny]; + } + /* fill lines in history buffer and update term.histf */ + for (/*i = -1 */; ny >= 0 && i >= -HISTSIZE; i--, ny--) { + j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE; + free(term.hist[j]); + term.hist[j] = buf[ny]; + } + term.histf = -i - 1; + term.scr = MIN(term.scr, term.histf); + /* resize rest of the history lines */ + for (/*i = -term.histf - 1 */; i >= -HISTSIZE; i--) { + j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE; + term.hist[j] = xrealloc(term.hist[j], col * sizeof(Glyph)); + } + free(buf); +} + +void +rscrolldown(int n) +{ + int i; + Line temp; + + /* can never be true as of now + if (IS_SET(MODE_ALTSCREEN)) + return; */ + + if ((n = MIN(n, term.histf)) <= 0) + return; + + for (i = term.c.y + n; i >= n; i--) { + temp = term.line[i]; + term.line[i] = term.line[i-n]; + term.line[i-n] = temp; + } + for (/*i = n - 1 */; i >= 0; i--) { + temp = term.line[i]; + term.line[i] = term.hist[term.histi]; + term.hist[term.histi] = temp; + term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE; + } + term.c.y += n; + term.histf -= n; + if ((i = term.scr - n) >= 0) { + term.scr = i; + } else { + term.scr = 0; + if (sel.ob.x != -1 && !sel.alt) + selmove(-i); + } +} + +void +tresize(int col, int row) +{ + int *bp; + + /* col and row are always MAX(_, 1) + if (col < 1 || row < 1) { + fprintf(stderr, "tresize: error resizing to %dx%d\n", col, row); + return; + } */ + + term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty)); + term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs)); + 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; + } + + if (IS_SET(MODE_ALTSCREEN)) + tresizealt(col, row); + else + tresizedef(col, row); +} + +void +tresizedef(int col, int row) +{ + int i, j; + + /* return if dimensions haven't changed */ + if (term.col == col && term.row == row) { + tfulldirt(); + return; + } + if (col != term.col) { + if (!sel.alt) + selremove(); + treflow(col, row); + } else { + /* slide screen up if otherwise cursor would get out of the screen */ + if (term.c.y >= row) { + tscrollup(0, term.row - 1, term.c.y - row + 1, SCROLL_RESIZE); + term.c.y = row - 1; + } + for (i = row; i < term.row; i++) + free(term.line[i]); + + /* resize to new height */ + term.line = xrealloc(term.line, row * sizeof(Line)); + /* allocate any new rows */ + for (i = term.row; i < row; i++) { + term.line[i] = xmalloc(col * sizeof(Glyph)); + for (j = 0; j < col; j++) + tclearglyph(&term.line[i][j], 0); + } + /* scroll down as much as height has increased */ + rscrolldown(row - term.row); + } + /* update terminal size */ + term.col = col, term.row = row; + /* reset scrolling region */ + term.top = 0, term.bot = row - 1; + /* dirty all lines */ + tfulldirt(); +} + +void +tresizealt(int col, int row) +{ + int i, j; + + /* return if dimensions haven't changed */ + if (term.col == col && term.row == row) { + tfulldirt(); + return; + } + if (sel.alt) + selremove(); + /* slide screen up if otherwise cursor would get out of the screen */ + for (i = 0; i <= term.c.y - row; i++) + free(term.line[i]); + if (i > 0) { + /* ensure that both src and dst are not NULL */ + memmove(term.line, term.line + i, row * sizeof(Line)); + term.c.y = row - 1; + } + for (i += row; i < term.row; i++) + free(term.line[i]); + /* resize to new height */ + term.line = xrealloc(term.line, row * sizeof(Line)); + /* resize to new width */ + for (i = 0; i < MIN(row, term.row); i++) { + term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); + for (j = term.col; j < col; j++) + tclearglyph(&term.line[i][j], 0); + } + /* allocate any new rows */ + for (/*i = MIN(row, term.row) */; i < row; i++) { + term.line[i] = xmalloc(col * sizeof(Glyph)); + for (j = 0; j < col; j++) + tclearglyph(&term.line[i][j], 0); + } + /* update cursor */ + if (term.c.x >= col) { + term.c.state &= ~CURSOR_WRAPNEXT; + term.c.x = col - 1; + } else { + UPDATEWRAPNEXT(1, col); + } + /* update terminal size */ + term.col = col, term.row = row; + /* reset scrolling region */ + term.top = 0, term.bot = row - 1; + /* dirty all lines */ + tfulldirt(); +} + +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(TLINE(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); + 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(); + if (ocx != term.ocx || ocy != term.ocy) + xximspot(term.ocx, term.ocy); +} + +void +redraw(void) +{ + tfulldirt(); + draw(); +} diff --git a/st.h b/st.h @@ -0,0 +1,135 @@ +/* See LICENSE for license details. */ + +#include <stdint.h> +#include <sys/types.h> + +/* macros */ +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#define MAX(a, b) ((a) < (b) ? (b) : (a)) +#define LEN(a) (sizeof(a) / sizeof(a)[0]) +#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b)) +#define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d)) +#define DEFAULT(a, b) (a) = (a) ? (a) : (b) +#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x) +#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || \ + (a).bg != (b).bg) +#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + \ + (t1.tv_nsec-t2.tv_nsec)/1E6) +#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit))) + +#define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b)) +#define IS_TRUECOL(x) (1 << 24 & (x)) + +enum glyph_attribute { + ATTR_NULL = 0, + ATTR_SET = 1 << 0, + ATTR_BOLD = 1 << 1, + ATTR_FAINT = 1 << 2, + ATTR_ITALIC = 1 << 3, + ATTR_UNDERLINE = 1 << 4, + ATTR_BLINK = 1 << 5, + ATTR_REVERSE = 1 << 6, + ATTR_INVISIBLE = 1 << 7, + ATTR_STRUCK = 1 << 8, + ATTR_WRAP = 1 << 9, + ATTR_WIDE = 1 << 10, + ATTR_WDUMMY = 1 << 11, + ATTR_SELECTED = 1 << 12, + ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT, +}; + +enum selection_mode { + SEL_IDLE = 0, + SEL_EMPTY = 1, + SEL_READY = 2 +}; + +enum selection_type { + SEL_REGULAR = 1, + SEL_RECTANGULAR = 2 +}; + +enum selection_snap { + SNAP_WORD = 1, + SNAP_LINE = 2 +}; + +typedef unsigned char uchar; +typedef unsigned int uint; +typedef unsigned long ulong; +typedef unsigned short ushort; + +typedef uint_least32_t Rune; + +#define Glyph Glyph_ +typedef struct { + Rune u; /* character code */ + ushort mode; /* attribute flags */ + uint32_t fg; /* foreground */ + uint32_t bg; /* background */ +} Glyph; + +typedef Glyph *Line; + +typedef union { + int i; + uint ui; + float f; + const void *v; + const char *s; +} Arg; + +void die(const char *, ...); +void redraw(void); +void tfulldirt(void); +void draw(void); + +void kscrolldown(const Arg *); +void kscrollup(const Arg *); +void printscreen(const Arg *); +void printsel(const Arg *); +void sendbreak(const Arg *); +void toggleprinter(const Arg *); + +int tattrset(int); +void tnew(int, int); +int tisaltscreen(void); +void tresize(int, int); +void tsetdirtattr(int); +void ttyhangup(void); +int ttynew(const char *, char *, const char *, char **); +size_t ttyread(void); +void ttyresize(int, int); +void ttywrite(const char *, size_t, int); + +void resettitle(void); + +void selclear(void); +void selinit(void); +void selstart(int, int, int); +void selextend(int, int, int, int); +int selected(int, int); +char *getsel(void); + +size_t utf8encode(Rune, char *); + +void *xmalloc(size_t); +void *xrealloc(void *, size_t); +char *xstrdup(const char *); + +int xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b); + +/* config.h globals */ +extern char *utmp; +extern char *scroll; +extern char *stty_args; +extern char *vtiden; +extern wchar_t *worddelimiters; +extern int allowaltscreen; +extern int allowwindowops; +extern char *termname; +extern unsigned int tabspaces; +extern unsigned int defaultfg; +extern unsigned int defaultbg; +extern unsigned int defaultcs; +extern float alpha, alphaUnfocused; diff --git a/st.info b/st.info @@ -0,0 +1,239 @@ +st-mono| simpleterm monocolor, + acsc=+C\,D-A.B0E``aaffgghFiGjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~, + am, + bce, + bel=^G, + blink=\E[5m, + bold=\E[1m, + cbt=\E[Z, + cvvis=\E[?25h, + civis=\E[?25l, + clear=\E[H\E[2J, + cnorm=\E[?12l\E[?25h, + colors#2, + cols#80, + cr=^M, + csr=\E[%i%p1%d;%p2%dr, + cub=\E[%p1%dD, + cub1=^H, + cud1=^J, + cud=\E[%p1%dB, + cuf1=\E[C, + cuf=\E[%p1%dC, + cup=\E[%i%p1%d;%p2%dH, + cuu1=\E[A, + cuu=\E[%p1%dA, + dch=\E[%p1%dP, + dch1=\E[P, + dim=\E[2m, + dl=\E[%p1%dM, + dl1=\E[M, + ech=\E[%p1%dX, + ed=\E[J, + el=\E[K, + el1=\E[1K, + enacs=\E)0, + flash=\E[?5h$<80/>\E[?5l, + fsl=^G, + home=\E[H, + hpa=\E[%i%p1%dG, + hs, + ht=^I, + hts=\EH, + ich=\E[%p1%d@, + il1=\E[L, + il=\E[%p1%dL, + ind=^J, + indn=\E[%p1%dS, + invis=\E[8m, + is2=\E[4l\E>\E[?1034l, + it#8, + kel=\E[1;2F, + ked=\E[1;5F, + ka1=\E[1~, + ka3=\E[5~, + kc1=\E[4~, + kc3=\E[6~, + kbs=\177, + kcbt=\E[Z, + kb2=\EOu, + kcub1=\EOD, + kcud1=\EOB, + kcuf1=\EOC, + kcuu1=\EOA, + kDC=\E[3;2~, + kent=\EOM, + kEND=\E[1;2F, + kIC=\E[2;2~, + kNXT=\E[6;2~, + kPRV=\E[5;2~, + kHOM=\E[1;2H, + kLFT=\E[1;2D, + kRIT=\E[1;2C, + kind=\E[1;2B, + kri=\E[1;2A, + kclr=\E[3;5~, + kdl1=\E[3;2~, + kdch1=\E[3~, + kich1=\E[2~, + kend=\E[4~, + kf1=\EOP, + kf2=\EOQ, + kf3=\EOR, + kf4=\EOS, + kf5=\E[15~, + kf6=\E[17~, + kf7=\E[18~, + kf8=\E[19~, + kf9=\E[20~, + kf10=\E[21~, + kf11=\E[23~, + kf12=\E[24~, + kf13=\E[1;2P, + kf14=\E[1;2Q, + kf15=\E[1;2R, + kf16=\E[1;2S, + kf17=\E[15;2~, + kf18=\E[17;2~, + kf19=\E[18;2~, + kf20=\E[19;2~, + kf21=\E[20;2~, + kf22=\E[21;2~, + kf23=\E[23;2~, + kf24=\E[24;2~, + kf25=\E[1;5P, + kf26=\E[1;5Q, + kf27=\E[1;5R, + kf28=\E[1;5S, + kf29=\E[15;5~, + kf30=\E[17;5~, + kf31=\E[18;5~, + kf32=\E[19;5~, + kf33=\E[20;5~, + kf34=\E[21;5~, + kf35=\E[23;5~, + kf36=\E[24;5~, + kf37=\E[1;6P, + kf38=\E[1;6Q, + kf39=\E[1;6R, + kf40=\E[1;6S, + kf41=\E[15;6~, + kf42=\E[17;6~, + kf43=\E[18;6~, + kf44=\E[19;6~, + kf45=\E[20;6~, + kf46=\E[21;6~, + kf47=\E[23;6~, + kf48=\E[24;6~, + kf49=\E[1;3P, + kf50=\E[1;3Q, + kf51=\E[1;3R, + kf52=\E[1;3S, + kf53=\E[15;3~, + kf54=\E[17;3~, + kf55=\E[18;3~, + kf56=\E[19;3~, + kf57=\E[20;3~, + kf58=\E[21;3~, + kf59=\E[23;3~, + kf60=\E[24;3~, + kf61=\E[1;4P, + kf62=\E[1;4Q, + kf63=\E[1;4R, + khome=\E[1~, + kil1=\E[2;5~, + krmir=\E[2;2~, + knp=\E[6~, + kmous=\E[M, + kpp=\E[5~, + lines#24, + mir, + msgr, + npc, + op=\E[39;49m, + pairs#64, + mc0=\E[i, + mc4=\E[4i, + mc5=\E[5i, + rc=\E8, + rev=\E[7m, + ri=\EM, + rin=\E[%p1%dT, + ritm=\E[23m, + rmacs=\E(B, + rmcup=\E[?1049l, + rmir=\E[4l, + rmkx=\E[?1l\E>, + rmso=\E[27m, + rmul=\E[24m, + rs1=\Ec, + rs2=\E[4l\E>\E[?1034l, + sc=\E7, + sitm=\E[3m, + sgr0=\E[0m, + smacs=\E(0, + smcup=\E[?1049h, + smir=\E[4h, + smkx=\E[?1h\E=, + smso=\E[7m, + smul=\E[4m, + tbc=\E[3g, + tsl=\E]0;, + xenl, + vpa=\E[%i%p1%dd, +# XTerm extensions + rmxx=\E[29m, + smxx=\E[9m, +# disabled rep for now: causes some issues with older ncurses versions. +# rep=%p1%c\E[%p2%{1}%-%db, +# tmux extensions, see TERMINFO EXTENSIONS in tmux(1) + Tc, + Ms=\E]52;%p1%s;%p2%s\007, + Se=\E[2 q, + Ss=\E[%p1%d q, + +st| simpleterm, + use=st-mono, + colors#8, + setab=\E[4%p1%dm, + setaf=\E[3%p1%dm, + setb=\E[4%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m, + setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m, + sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m, + +st-256color| simpleterm with 256 colors, + use=st, + ccc, + colors#256, + oc=\E]104\007, + pairs#32767, +# Nicked from xterm-256color + initc=\E]4;%p1%d;rgb\:%p2%{255}%*%{1000}%/%2.2X/%p3%{255}%*%{1000}%/%2.2X/%p4%{255}%*%{1000}%/%2.2X\E\\, + setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m, + setaf=\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m, + +st-meta| simpleterm with meta key, + use=st, + km, + rmm=\E[?1034l, + smm=\E[?1034h, + rs2=\E[4l\E>\E[?1034h, + is2=\E[4l\E>\E[?1034h, + +st-meta-256color| simpleterm with meta key and 256 colors, + use=st-256color, + km, + rmm=\E[?1034l, + smm=\E[?1034h, + rs2=\E[4l\E>\E[?1034h, + is2=\E[4l\E>\E[?1034h, + +st-bs| simpleterm with backspace as backspace, + use=st, + kbs=\010, + kdch1=\177, + +st-bs-256color| simpleterm with backspace as backspace and 256colors, + use=st-256color, + kbs=\010, + kdch1=\177, diff --git a/win.h b/win.h @@ -0,0 +1,40 @@ +/* See LICENSE for license details. */ + +enum win_mode { + MODE_VISIBLE = 1 << 0, + MODE_FOCUSED = 1 << 1, + MODE_APPKEYPAD = 1 << 2, + MODE_MOUSEBTN = 1 << 3, + MODE_MOUSEMOTION = 1 << 4, + MODE_REVERSE = 1 << 5, + MODE_KBDLOCK = 1 << 6, + MODE_HIDE = 1 << 7, + MODE_APPCURSOR = 1 << 8, + MODE_MOUSESGR = 1 << 9, + MODE_8BIT = 1 << 10, + MODE_BLINK = 1 << 11, + MODE_FBLINK = 1 << 12, + MODE_FOCUS = 1 << 13, + MODE_MOUSEX10 = 1 << 14, + MODE_MOUSEMANY = 1 << 15, + MODE_BRCKTPASTE = 1 << 16, + MODE_NUMLOCK = 1 << 17, + MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\ + |MODE_MOUSEMANY, +}; + +void xbell(void); +void xclipcopy(void); +void xdrawcursor(int, int, Glyph, int, int, Glyph); +void xdrawline(Line, int, int, int); +void xfinishdraw(void); +void xloadcols(void); +int xsetcolorname(int, const char *); +void xseticontitle(char *); +void xsettitle(char *); +int xsetcursor(int); +void xsetmode(int, unsigned int); +void xsetpointermotion(int); +void xsetsel(char *); +int xstartdraw(void); +void xximspot(int, int); diff --git a/x.c b/x.c @@ -0,0 +1,2422 @@ +/* See LICENSE for license details. */ +#include <errno.h> +#include <math.h> +#include <limits.h> +#include <locale.h> +#include <signal.h> +#include <sys/select.h> +#include <time.h> +#include <unistd.h> +#include <libgen.h> +#include <X11/Xatom.h> +#include <X11/Xlib.h> +#include <X11/cursorfont.h> +#include <X11/keysym.h> +#include <X11/Xft/Xft.h> +#include <X11/XKBlib.h> +#include <X11/Xresource.h> + +char *argv0; +#include "arg.h" +#include "st.h" +#include "win.h" + +/* types used in config.h */ +typedef struct { + uint mod; + KeySym keysym; + void (*func)(const Arg *); + const Arg arg; +} Shortcut; + +typedef struct { + uint mod; + uint button; + void (*func)(const Arg *); + const Arg arg; + uint release; +} MouseShortcut; + +typedef struct { + KeySym k; + uint mask; + char *s; + /* three-valued logic variables: 0 indifferent, 1 on, -1 off */ + signed char appkey; /* application keypad */ + signed char appcursor; /* application cursor */ +} Key; + +/* X modifiers */ +#define XK_ANY_MOD UINT_MAX +#define XK_NO_MOD 0 +#define XK_SWITCH_MOD (1<<13|1<<14) + +/* function definitions used in config.h */ +static void clipcopy(const Arg *); +static void clippaste(const Arg *); +static void numlock(const Arg *); +static void selpaste(const Arg *); +static void zoom(const Arg *); +static void zoomabs(const Arg *); +static void zoomreset(const Arg *); +static void ttysend(const Arg *); + +/* config.h for applying patches and the configuration. */ +#include "config.h" + +/* XEMBED messages */ +#define XEMBED_FOCUS_IN 4 +#define XEMBED_FOCUS_OUT 5 + +/* macros */ +#define IS_SET(flag) ((win.mode & (flag)) != 0) +#define TRUERED(x) (((x) & 0xff0000) >> 8) +#define TRUEGREEN(x) (((x) & 0xff00)) +#define TRUEBLUE(x) (((x) & 0xff) << 8) + +typedef XftDraw *Draw; +typedef XftColor Color; +typedef XftGlyphFontSpec GlyphFontSpec; + +/* Purely graphic info */ +typedef struct { + int tw, th; /* tty width and height */ + int w, h; /* window width and height */ + int ch; /* char height */ + int cw; /* char width */ + int mode; /* window state/mode flags */ + int cursor; /* cursor style */ +} TermWindow; + +typedef struct { + Display *dpy; + Colormap cmap; + Window win; + Drawable buf; + GlyphFontSpec *specbuf; /* font spec buffer used for rendering */ + Atom xembed, wmdeletewin, netwmname, netwmiconname, netwmpid; + struct { + XIM xim; + XIC xic; + XPoint spot; + XVaNestedList spotlist; + } ime; + Draw draw; + Visual *vis; + XSetWindowAttributes attrs; + /* Here, we use the term *pointer* to differentiate the cursor + * one sees when hovering the mouse over the terminal from, e.g., + * a green rectangle where text would be entered. */ + Cursor vpointer, bpointer; /* visible and hidden pointers */ + int pointerisvisible; + int scr; + int isfixed; /* is fixed geometry? */ + int depth; /* bit depth */ + int l, t; /* left and top offset */ + int gm; /* geometry mask */ +} XWindow; + +typedef struct { + Atom xtarget; + char *primary, *clipboard; + struct timespec tclick1; + struct timespec tclick2; +} XSelection; + +/* Font structure */ +#define Font Font_ +typedef struct { + int height; + int width; + int ascent; + int descent; + int badslant; + int badweight; + short lbearing; + short rbearing; + XftFont *match; + FcFontSet *set; + FcPattern *pattern; +} Font; + +/* Drawing Context */ +typedef struct { + Color *col; + size_t collen; + Font font, bfont, ifont, ibfont; + GC gc; +} DC; + +static inline ushort sixd_to_16bit(int); +static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int); +static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int); +static void xdrawglyph(Glyph, int, int); +static void xclear(int, int, int, int); +static int xgeommasktogravity(int); +static int ximopen(Display *); +static void ximinstantiate(Display *, XPointer, XPointer); +static void ximdestroy(XIM, XPointer, XPointer); +static int xicdestroy(XIC, XPointer, XPointer); +static void xinit(int, int); +static void cresize(int, int); +static void xresize(int, int); +static void xhints(void); +static int xloadcolor(int, const char *, Color *); +static int xloadfont(Font *, FcPattern *); +static void xloadfonts(const char *, double); +static int xloadsparefont(FcPattern *, int); +static void xloadsparefonts(void); +static void xunloadfont(Font *); +static void xunloadfonts(void); +static void xsetenv(void); +static void xseturgency(int); +static int evcol(XEvent *); +static int evrow(XEvent *); + +static void expose(XEvent *); +static void visibility(XEvent *); +static void unmap(XEvent *); +static void kpress(XEvent *); +static void cmessage(XEvent *); +static void resize(XEvent *); +static void focus(XEvent *); +static uint buttonmask(uint); +static int mouseaction(XEvent *, uint); +static void brelease(XEvent *); +static void bpress(XEvent *); +static void bmotion(XEvent *); +static void propnotify(XEvent *); +static void selnotify(XEvent *); +static void selclear_(XEvent *); +static void selrequest(XEvent *); +static void setsel(char *, Time); +static void mousesel(XEvent *, int); +static void mousereport(XEvent *); +static char *kmap(KeySym, uint); +static int match(uint, uint); + +static void run(void); +static void usage(void); + +static void (*handler[LASTEvent])(XEvent *) = { + [KeyPress] = kpress, + [ClientMessage] = cmessage, + [ConfigureNotify] = resize, + [VisibilityNotify] = visibility, + [UnmapNotify] = unmap, + [Expose] = expose, + [FocusIn] = focus, + [FocusOut] = focus, + [MotionNotify] = bmotion, + [ButtonPress] = bpress, + [ButtonRelease] = brelease, +/* + * Uncomment if you want the selection to disappear when you select something + * different in another window. + */ +/* [SelectionClear] = selclear_, */ + [SelectionNotify] = selnotify, +/* + * PropertyNotify is only turned on when there is some INCR transfer happening + * for the selection retrieval. + */ + [PropertyNotify] = propnotify, + [SelectionRequest] = selrequest, +}; + +/* Globals */ +static DC dc; +static XWindow xw; +static XSelection xsel; +static TermWindow win; + +/* Font Ring Cache */ +enum { + FRC_NORMAL, + FRC_ITALIC, + FRC_BOLD, + FRC_ITALICBOLD +}; + +typedef struct { + XftFont *font; + int flags; + Rune unicodep; +} Fontcache; + +/* Fontcache is an array now. A new font will be appended to the array. */ +static Fontcache *frc = NULL; +static int frclen = 0; +static int frccap = 0; +static char *usedfont = NULL; +static double usedfontsize = 0; +static double defaultfontsize = 0; + +static char *opt_alpha = NULL; +static char *opt_class = NULL; +static char **opt_cmd = NULL; +static char *opt_embed = NULL; +static char *opt_font = NULL; +static char *opt_io = NULL; +static char *opt_line = NULL; +static char *opt_name = NULL; +static char *opt_title = NULL; + +static int focused = 0; + +static uint buttons; /* bit field of pressed buttons */ +static int cursorblinks = 0; + +void +clipcopy(const Arg *dummy) +{ + Atom clipboard; + + free(xsel.clipboard); + xsel.clipboard = NULL; + + if (xsel.primary != NULL) { + xsel.clipboard = xstrdup(xsel.primary); + clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0); + XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime); + } +} + +void +clippaste(const Arg *dummy) +{ + Atom clipboard; + + clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0); + XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard, + xw.win, CurrentTime); +} + +void +selpaste(const Arg *dummy) +{ + XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY, + xw.win, CurrentTime); +} + +void +numlock(const Arg *dummy) +{ + win.mode ^= MODE_NUMLOCK; +} + +void +zoom(const Arg *arg) +{ + Arg larg; + + larg.f = usedfontsize + arg->f; + zoomabs(&larg); +} + +void +zoomabs(const Arg *arg) +{ + xunloadfonts(); + xloadfonts(usedfont, arg->f); + xloadsparefonts(); + cresize(0, 0); + redraw(); + xhints(); +} + +void +zoomreset(const Arg *arg) +{ + Arg larg; + + if (defaultfontsize > 0) { + larg.f = defaultfontsize; + zoomabs(&larg); + } +} + +void +ttysend(const Arg *arg) +{ + ttywrite(arg->s, strlen(arg->s), 1); +} + +int +evcol(XEvent *e) +{ + int x = e->xbutton.x - borderpx; + LIMIT(x, 0, win.tw - 1); + return x / win.cw; +} + +int +evrow(XEvent *e) +{ + int y = e->xbutton.y - borderpx; + LIMIT(y, 0, win.th - 1); + return y / win.ch; +} + +void +mousesel(XEvent *e, int done) +{ + int type, seltype = SEL_REGULAR; + uint state = e->xbutton.state & ~(Button1Mask | forcemousemod); + + for (type = 1; type < LEN(selmasks); ++type) { + if (match(selmasks[type], state)) { + seltype = type; + break; + } + } + selextend(evcol(e), evrow(e), seltype, done); + if (done) + setsel(getsel(), e->xbutton.time); +} + +void +mousereport(XEvent *e) +{ + int len, btn, code; + int x = evcol(e), y = evrow(e); + int state = e->xbutton.state; + char buf[40]; + static int ox, oy; + + if (e->type == MotionNotify) { + if (x == ox && y == oy) + return; + if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY)) + return; + /* MODE_MOUSEMOTION: no reporting if no button is pressed */ + if (IS_SET(MODE_MOUSEMOTION) && buttons == 0) + return; + /* Set btn to lowest-numbered pressed button, or 12 if no + * buttons are pressed. */ + for (btn = 1; btn <= 11 && !(buttons & (1<<(btn-1))); btn++) + ; + code = 32; + } else { + btn = e->xbutton.button; + /* Only buttons 1 through 11 can be encoded */ + if (btn < 1 || btn > 11) + return; + if (e->type == ButtonRelease) { + /* MODE_MOUSEX10: no button release reporting */ + if (IS_SET(MODE_MOUSEX10)) + return; + /* Don't send release events for the scroll wheel */ + if (btn == 4 || btn == 5) + return; + } + code = 0; + } + + ox = x; + oy = y; + + /* Encode btn into code. If no button is pressed for a motion event in + * MODE_MOUSEMANY, then encode it as a release. */ + if ((!IS_SET(MODE_MOUSESGR) && e->type == ButtonRelease) || btn == 12) + code += 3; + else if (btn >= 8) + code += 128 + btn - 8; + else if (btn >= 4) + code += 64 + btn - 4; + else + code += btn - 1; + + if (!IS_SET(MODE_MOUSEX10)) { + code += ((state & ShiftMask ) ? 4 : 0) + + ((state & Mod1Mask ) ? 8 : 0) /* meta key: alt */ + + ((state & ControlMask) ? 16 : 0); + } + + if (IS_SET(MODE_MOUSESGR)) { + len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c", + code, x+1, y+1, + e->type == ButtonRelease ? 'm' : 'M'); + } else if (x < 223 && y < 223) { + len = snprintf(buf, sizeof(buf), "\033[M%c%c%c", + 32+code, 32+x+1, 32+y+1); + } else { + return; + } + + ttywrite(buf, len, 0); +} + +uint +buttonmask(uint button) +{ + return button == Button1 ? Button1Mask + : button == Button2 ? Button2Mask + : button == Button3 ? Button3Mask + : button == Button4 ? Button4Mask + : button == Button5 ? Button5Mask + : 0; +} + +int +mouseaction(XEvent *e, uint release) +{ + MouseShortcut *ms; + + /* ignore Button<N>mask for Button<N> - it's set on release */ + uint state = e->xbutton.state & ~buttonmask(e->xbutton.button); + + for (ms = mshortcuts; ms < mshortcuts + LEN(mshortcuts); ms++) { + if (ms->release == release && + ms->button == e->xbutton.button && + (match(ms->mod, state) || /* exact or forced */ + match(ms->mod, state & ~forcemousemod))) { + ms->func(&(ms->arg)); + return 1; + } + } + + return 0; +} + +void +bpress(XEvent *e) +{ + int btn = e->xbutton.button; + struct timespec now; + int snap; + + if (1 <= btn && btn <= 11) + buttons |= 1 << (btn-1); + + if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) { + mousereport(e); + return; + } + + if (mouseaction(e, 0)) + return; + + if (btn == Button1) { + /* + * If the user clicks below predefined timeouts specific + * snapping behaviour is exposed. + */ + clock_gettime(CLOCK_MONOTONIC, &now); + if (TIMEDIFF(now, xsel.tclick2) <= tripleclicktimeout) { + snap = SNAP_LINE; + } else if (TIMEDIFF(now, xsel.tclick1) <= doubleclicktimeout) { + snap = SNAP_WORD; + } else { + snap = 0; + } + xsel.tclick2 = xsel.tclick1; + xsel.tclick1 = now; + + selstart(evcol(e), evrow(e), snap); + } +} + +void +propnotify(XEvent *e) +{ + XPropertyEvent *xpev; + Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0); + + xpev = &e->xproperty; + if (xpev->state == PropertyNewValue && + (xpev->atom == XA_PRIMARY || + xpev->atom == clipboard)) { + selnotify(e); + } +} + +void +selnotify(XEvent *e) +{ + ulong nitems, ofs, rem; + int format; + uchar *data, *last, *repl; + Atom type, incratom, property = None; + + incratom = XInternAtom(xw.dpy, "INCR", 0); + + ofs = 0; + if (e->type == SelectionNotify) + property = e->xselection.property; + else if (e->type == PropertyNotify) + property = e->xproperty.atom; + + if (property == None) + return; + + do { + if (XGetWindowProperty(xw.dpy, xw.win, property, ofs, + BUFSIZ/4, False, AnyPropertyType, + &type, &format, &nitems, &rem, + &data)) { + fprintf(stderr, "Clipboard allocation failed\n"); + return; + } + + if (e->type == PropertyNotify && nitems == 0 && rem == 0) { + /* + * If there is some PropertyNotify with no data, then + * this is the signal of the selection owner that all + * data has been transferred. We won't need to receive + * PropertyNotify events anymore. + */ + MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask); + XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, + &xw.attrs); + } + + if (type == incratom) { + /* + * Activate the PropertyNotify events so we receive + * when the selection owner does send us the next + * chunk of data. + */ + MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask); + XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, + &xw.attrs); + + /* + * Deleting the property is the transfer start signal. + */ + XDeleteProperty(xw.dpy, xw.win, (int)property); + continue; + } + + /* + * As seen in getsel: + * Line endings are inconsistent in the terminal and GUI world + * copy and pasting. When receiving some selection data, + * replace all '\n' with '\r'. + * FIXME: Fix the computer world. + */ + repl = data; + last = data + nitems * format / 8; + while ((repl = memchr(repl, '\n', last - repl))) { + *repl++ = '\r'; + } + + if (IS_SET(MODE_BRCKTPASTE) && ofs == 0) + ttywrite("\033[200~", 6, 0); + ttywrite((char *)data, nitems * format / 8, 1); + if (IS_SET(MODE_BRCKTPASTE) && rem == 0) + ttywrite("\033[201~", 6, 0); + XFree(data); + /* number of 32-bit chunks returned */ + ofs += nitems * format / 32; + } while (rem > 0); + + /* + * Deleting the property again tells the selection owner to send the + * next data chunk in the property. + */ + XDeleteProperty(xw.dpy, xw.win, (int)property); +} + +void +xclipcopy(void) +{ + clipcopy(NULL); +} + +void +selclear_(XEvent *e) +{ + selclear(); +} + +void +selrequest(XEvent *e) +{ + XSelectionRequestEvent *xsre; + XSelectionEvent xev; + Atom xa_targets, string, clipboard; + char *seltext; + + xsre = (XSelectionRequestEvent *) e; + xev.type = SelectionNotify; + xev.requestor = xsre->requestor; + xev.selection = xsre->selection; + xev.target = xsre->target; + xev.time = xsre->time; + if (xsre->property == None) + xsre->property = xsre->target; + + /* reject */ + xev.property = None; + + xa_targets = XInternAtom(xw.dpy, "TARGETS", 0); + if (xsre->target == xa_targets) { + /* respond with the supported type */ + string = xsel.xtarget; + XChangeProperty(xsre->display, xsre->requestor, xsre->property, + XA_ATOM, 32, PropModeReplace, + (uchar *) &string, 1); + xev.property = xsre->property; + } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) { + /* + * xith XA_STRING non ascii characters may be incorrect in the + * requestor. It is not our problem, use utf8. + */ + clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0); + if (xsre->selection == XA_PRIMARY) { + seltext = xsel.primary; + } else if (xsre->selection == clipboard) { + seltext = xsel.clipboard; + } else { + fprintf(stderr, + "Unhandled clipboard selection 0x%lx\n", + xsre->selection); + return; + } + if (seltext != NULL) { + XChangeProperty(xsre->display, xsre->requestor, + xsre->property, xsre->target, + 8, PropModeReplace, + (uchar *)seltext, strlen(seltext)); + xev.property = xsre->property; + } + } + + /* all done, send a notification to the listener */ + if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev)) + fprintf(stderr, "Error sending SelectionNotify event\n"); +} + +void +setsel(char *str, Time t) +{ + if (!str) + return; + + free(xsel.primary); + xsel.primary = str; + + XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t); + if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win) + selclear(); +} + +void +xsetsel(char *str) +{ + setsel(str, CurrentTime); +} + +void +brelease(XEvent *e) +{ + int btn = e->xbutton.button; + + if (1 <= btn && btn <= 11) + buttons &= ~(1 << (btn-1)); + + if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) { + mousereport(e); + return; + } + + if (mouseaction(e, 1)) + return; + if (btn == Button1) + mousesel(e, 1); +} + +void +bmotion(XEvent *e) +{ + if (!xw.pointerisvisible) { + XDefineCursor(xw.dpy, xw.win, xw.vpointer); + xw.pointerisvisible = 1; + if (!IS_SET(MODE_MOUSEMANY)) + xsetpointermotion(0); + } + + if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forcemousemod)) { + mousereport(e); + return; + } + + mousesel(e, 0); +} + +void +cresize(int width, int height) +{ + int col, row; + + if (width != 0) + win.w = width; + if (height != 0) + win.h = height; + + col = (win.w - 2 * borderpx) / win.cw; + row = (win.h - 2 * borderpx) / win.ch; + col = MAX(1, col); + row = MAX(1, row); + + tresize(col, row); + xresize(col, row); + ttyresize(win.tw, win.th); +} + +void +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, + xw.depth); + XftDrawChange(xw.draw, xw.buf); + xclear(0, 0, win.w, win.h); + + /* resize to new width */ + xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec)); +} + +ushort +sixd_to_16bit(int x) +{ + return x == 0 ? 0 : 0x3737 + 0x2828 * x; +} + +int +xloadcolor(int i, const char *name, Color *ncolor) +{ + XRenderColor color = { .alpha = 0xffff }; + + if (!name) { + if (BETWEEN(i, 16, 255)) { /* 256 color */ + if (i < 6*6*6+16) { /* same colors as xterm */ + color.red = sixd_to_16bit( ((i-16)/36)%6 ); + color.green = sixd_to_16bit( ((i-16)/6) %6 ); + color.blue = sixd_to_16bit( ((i-16)/1) %6 ); + } else { /* greyscale */ + color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16)); + color.green = color.blue = color.red; + } + return XftColorAllocValue(xw.dpy, xw.vis, + xw.cmap, &color, ncolor); + } else + name = colorname[i]; + } + + return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor); +} + +void +xloadalpha(void) +{ + float const usedAlpha = focused ? alpha : alphaUnfocused; + if (opt_alpha) alpha = strtof(opt_alpha, NULL); + dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * usedAlpha); + dc.col[defaultbg].pixel &= 0x00FFFFFF; + dc.col[defaultbg].pixel |= (unsigned char)(0xff * usedAlpha) << 24; +} + +void +xloadcols(void) +{ + static int loaded; + Color *cp; + + if (!loaded) { + dc.collen = 1 + (defaultbg = MAX(LEN(colorname), 256)); + dc.col = xmalloc((dc.collen) * sizeof(Color)); + } + + for (int i = 0; i+1 < dc.collen; ++i) + if (!xloadcolor(i, NULL, &dc.col[i])) { + if (colorname[i]) + die("could not allocate color '%s'\n", colorname[i]); + else + die("could not allocate color %d\n", i); + } + if (dc.collen) // cannot die, as the color is already loaded. + xloadcolor(focused ?bg :bgUnfocused, NULL, &dc.col[defaultbg]); + + xloadalpha(); + loaded = 1; +} + +int +xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b) +{ + if (!BETWEEN(x, 0, dc.collen)) + return 1; + + *r = dc.col[x].color.red >> 8; + *g = dc.col[x].color.green >> 8; + *b = dc.col[x].color.blue >> 8; + + return 0; +} + +int +xsetcolorname(int x, const char *name) +{ + Color ncolor; + + if (!BETWEEN(x, 0, dc.collen)) + return 1; + + if (!xloadcolor(x, name, &ncolor)) + return 1; + + XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]); + dc.col[x] = ncolor; + + return 0; +} + +/* + * Absolute coordinates. + */ +void +xclear(int x1, int y1, int x2, int y2) +{ + XftDrawRect(xw.draw, + &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg], + x1, y1, x2-x1, y2-y1); +} + +void +xhints(void) +{ + XClassHint class = {opt_name ? opt_name : termname, + opt_class ? opt_class : termname}; + XWMHints wm = {.flags = InputHint, .input = 1}; + XSizeHints *sizeh; + + sizeh = XAllocSizeHints(); + + sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize; + sizeh->height = win.h; + sizeh->width = win.w; + sizeh->height_inc = win.ch; + sizeh->width_inc = win.cw; + sizeh->base_height = 2 * borderpx; + sizeh->base_width = 2 * borderpx; + sizeh->min_height = win.ch + 2 * borderpx; + sizeh->min_width = win.cw + 2 * borderpx; + if (xw.isfixed) { + sizeh->flags |= PMaxSize; + sizeh->min_width = sizeh->max_width = win.w; + sizeh->min_height = sizeh->max_height = win.h; + } + if (xw.gm & (XValue|YValue)) { + sizeh->flags |= USPosition | PWinGravity; + sizeh->x = xw.l; + sizeh->y = xw.t; + sizeh->win_gravity = xgeommasktogravity(xw.gm); + } + + XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, + &class); + XFree(sizeh); +} + +int +xgeommasktogravity(int mask) +{ + switch (mask & (XNegative|YNegative)) { + case 0: + return NorthWestGravity; + case XNegative: + return NorthEastGravity; + case YNegative: + return SouthWestGravity; + } + + return SouthEastGravity; +} + +int +xloadfont(Font *f, FcPattern *pattern) +{ + FcPattern *configured; + FcPattern *match; + FcResult result; + XGlyphInfo extents; + int wantattr, haveattr; + + /* + * Manually configure instead of calling XftMatchFont + * so that we can use the configured pattern for + * "missing glyph" lookups. + */ + configured = FcPatternDuplicate(pattern); + if (!configured) + return 1; + + FcConfigSubstitute(NULL, configured, FcMatchPattern); + XftDefaultSubstitute(xw.dpy, xw.scr, configured); + + match = FcFontMatch(NULL, configured, &result); + if (!match) { + FcPatternDestroy(configured); + return 1; + } + + if (!(f->match = XftFontOpenPattern(xw.dpy, match))) { + FcPatternDestroy(configured); + FcPatternDestroy(match); + return 1; + } + + if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) == + XftResultMatch)) { + /* + * Check if xft was unable to find a font with the appropriate + * slant but gave us one anyway. Try to mitigate. + */ + if ((XftPatternGetInteger(f->match->pattern, "slant", 0, + &haveattr) != XftResultMatch) || haveattr < wantattr) { + f->badslant = 1; + fputs("font slant does not match\n", stderr); + } + } + + if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) == + XftResultMatch)) { + if ((XftPatternGetInteger(f->match->pattern, "weight", 0, + &haveattr) != XftResultMatch) || haveattr != wantattr) { + f->badweight = 1; + fputs("font weight does not match\n", stderr); + } + } + + XftTextExtentsUtf8(xw.dpy, f->match, + (const FcChar8 *) ascii_printable, + strlen(ascii_printable), &extents); + + f->set = NULL; + f->pattern = configured; + + f->ascent = f->match->ascent; + f->descent = f->match->descent; + f->lbearing = 0; + f->rbearing = f->match->max_advance_width; + + f->height = f->ascent + f->descent; + f->width = DIVCEIL(extents.xOff, strlen(ascii_printable)); + + return 0; +} + +void +xloadfonts(const char *fontstr, double fontsize) +{ + FcPattern *pattern; + double fontval; + + if (fontstr[0] == '-') + pattern = XftXlfdParse(fontstr, False, False); + else + pattern = FcNameParse((const FcChar8 *)fontstr); + + if (!pattern) + die("can't open font %s\n", fontstr); + + if (fontsize > 1) { + FcPatternDel(pattern, FC_PIXEL_SIZE); + FcPatternDel(pattern, FC_SIZE); + FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize); + usedfontsize = fontsize; + } else { + if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) == + FcResultMatch) { + usedfontsize = fontval; + } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) == + FcResultMatch) { + usedfontsize = -1; + } else { + /* + * Default font size is 12, if none given. This is to + * have a known usedfontsize value. + */ + FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12); + usedfontsize = 12; + } + defaultfontsize = usedfontsize; + } + + if (xloadfont(&dc.font, pattern)) + die("can't open font %s\n", fontstr); + + if (usedfontsize < 0) { + FcPatternGetDouble(dc.font.match->pattern, + FC_PIXEL_SIZE, 0, &fontval); + usedfontsize = fontval; + if (fontsize == 0) + defaultfontsize = fontval; + } + + /* Setting character width and height. */ + win.cw = ceilf(dc.font.width * cwscale); + win.ch = ceilf(dc.font.height * chscale); + + FcPatternDel(pattern, FC_SLANT); + FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC); + if (xloadfont(&dc.ifont, pattern)) + die("can't open font %s\n", fontstr); + + FcPatternDel(pattern, FC_WEIGHT); + FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD); + if (xloadfont(&dc.ibfont, pattern)) + die("can't open font %s\n", fontstr); + + FcPatternDel(pattern, FC_SLANT); + FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN); + if (xloadfont(&dc.bfont, pattern)) + die("can't open font %s\n", fontstr); + + FcPatternDestroy(pattern); +} + +int +xloadsparefont(FcPattern *pattern, int flags) +{ + FcPattern *match; + FcResult result; + + match = FcFontMatch(NULL, pattern, &result); + if (!match) { + return 1; + } + + if (!(frc[frclen].font = XftFontOpenPattern(xw.dpy, match))) { + FcPatternDestroy(match); + return 1; + } + + frc[frclen].flags = flags; + /* Believe U+0000 glyph will present in each default font */ + frc[frclen].unicodep = 0; + frclen++; + + return 0; +} + +void +xloadsparefonts(void) +{ + FcPattern *pattern; + double sizeshift, fontval; + int fc; + char **fp; + + if (frclen != 0) + die("can't embed spare fonts. cache isn't empty"); + + /* Calculate count of spare fonts */ + fc = sizeof(font2) / sizeof(*font2); + if (fc == 0) + return; + + /* Allocate memory for cache entries. */ + if (frccap < 4 * fc) { + frccap += 4 * fc - frccap; + frc = xrealloc(frc, frccap * sizeof(Fontcache)); + } + + for (fp = font2; fp - font2 < fc; ++fp) { + + if (**fp == '-') + pattern = XftXlfdParse(*fp, False, False); + else + pattern = FcNameParse((FcChar8 *)*fp); + + if (!pattern) + die("can't open spare font %s\n", *fp); + + if (defaultfontsize > 0) { + sizeshift = usedfontsize - defaultfontsize; + if (sizeshift != 0 && + FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) == + FcResultMatch) { + fontval += sizeshift; + FcPatternDel(pattern, FC_PIXEL_SIZE); + FcPatternDel(pattern, FC_SIZE); + FcPatternAddDouble(pattern, FC_PIXEL_SIZE, fontval); + } + } + + FcPatternAddBool(pattern, FC_SCALABLE, 1); + + FcConfigSubstitute(NULL, pattern, FcMatchPattern); + XftDefaultSubstitute(xw.dpy, xw.scr, pattern); + + if (xloadsparefont(pattern, FRC_NORMAL)) + die("can't open spare font %s\n", *fp); + + FcPatternDel(pattern, FC_SLANT); + FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC); + if (xloadsparefont(pattern, FRC_ITALIC)) + die("can't open spare font %s\n", *fp); + + FcPatternDel(pattern, FC_WEIGHT); + FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD); + if (xloadsparefont(pattern, FRC_ITALICBOLD)) + die("can't open spare font %s\n", *fp); + + FcPatternDel(pattern, FC_SLANT); + FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN); + if (xloadsparefont(pattern, FRC_BOLD)) + die("can't open spare font %s\n", *fp); + + FcPatternDestroy(pattern); + } +} + +void +xunloadfont(Font *f) +{ + XftFontClose(xw.dpy, f->match); + FcPatternDestroy(f->pattern); + if (f->set) + FcFontSetDestroy(f->set); +} + +void +xunloadfonts(void) +{ + /* Free the loaded fonts in the font cache. */ + while (frclen > 0) + XftFontClose(xw.dpy, frc[--frclen].font); + + xunloadfont(&dc.font); + xunloadfont(&dc.bfont); + xunloadfont(&dc.ifont); + xunloadfont(&dc.ibfont); +} + +int +ximopen(Display *dpy) +{ + XIMCallback imdestroy = { .client_data = NULL, .callback = ximdestroy }; + XICCallback icdestroy = { .client_data = NULL, .callback = xicdestroy }; + + xw.ime.xim = XOpenIM(xw.dpy, NULL, NULL, NULL); + if (xw.ime.xim == NULL) + return 0; + + if (XSetIMValues(xw.ime.xim, XNDestroyCallback, &imdestroy, NULL)) + fprintf(stderr, "XSetIMValues: " + "Could not set XNDestroyCallback.\n"); + + xw.ime.spotlist = XVaCreateNestedList(0, XNSpotLocation, &xw.ime.spot, + NULL); + + if (xw.ime.xic == NULL) { + xw.ime.xic = XCreateIC(xw.ime.xim, XNInputStyle, + XIMPreeditNothing | XIMStatusNothing, + XNClientWindow, xw.win, + XNDestroyCallback, &icdestroy, + NULL); + } + if (xw.ime.xic == NULL) + fprintf(stderr, "XCreateIC: Could not create input context.\n"); + + return 1; +} + +void +ximinstantiate(Display *dpy, XPointer client, XPointer call) +{ + if (ximopen(dpy)) + XUnregisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL, + ximinstantiate, NULL); +} + +void +ximdestroy(XIM xim, XPointer client, XPointer call) +{ + xw.ime.xim = NULL; + XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL, + ximinstantiate, NULL); + XFree(xw.ime.spotlist); +} + +int +xicdestroy(XIC xim, XPointer client, XPointer call) +{ + xw.ime.xic = NULL; + return 1; +} + +void +xinit(int cols, int rows) +{ + XGCValues gcvalues; + Window parent; + pid_t thispid = getpid(); + XColor xmousefg, xmousebg; + XWindowAttributes attr; + XVisualInfo vis; + Pixmap blankpm; + + if (!(xw.dpy = XOpenDisplay(NULL))) + die("can't open display\n"); + xw.scr = XDefaultScreen(xw.dpy); + + if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) { + parent = XRootWindow(xw.dpy, xw.scr); + xw.depth = 32; + } else { + XGetWindowAttributes(xw.dpy, parent, &attr); + xw.depth = attr.depth; + } + + XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis); + xw.vis = vis.visual; + + /* font */ + if (!FcInit()) + die("could not init fontconfig.\n"); + + usedfont = (opt_font == NULL)? font : opt_font; + xloadfonts(usedfont, 0); + + /* spare fonts */ + xloadsparefonts(); + + /* colors */ + xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None); + xloadcols(); + + /* adjust fixed window geometry */ + win.w = 2 * borderpx + cols * win.cw; + win.h = 2 * borderpx + rows * win.ch; + if (xw.gm & XNegative) + xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2; + if (xw.gm & YNegative) + xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2; + + /* Events */ + xw.attrs.background_pixel = dc.col[defaultbg].pixel; + xw.attrs.border_pixel = dc.col[defaultbg].pixel; + xw.attrs.bit_gravity = NorthWestGravity; + xw.attrs.event_mask = FocusChangeMask | KeyPressMask | KeyReleaseMask + | ExposureMask | VisibilityChangeMask | StructureNotifyMask + | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask; + xw.attrs.colormap = xw.cmap; + + xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t, + win.w, win.h, 0, xw.depth, InputOutput, + xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity + | CWEventMask | CWColormap, &xw.attrs); + + memset(&gcvalues, 0, sizeof(gcvalues)); + gcvalues.graphics_exposures = False; + xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth); + dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues); + XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel); + XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h); + + /* font spec buffer */ + xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec)); + + /* Xft rendering context */ + xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap); + + /* input methods */ + if (!ximopen(xw.dpy)) { + XRegisterIMInstantiateCallback(xw.dpy, NULL, NULL, NULL, + ximinstantiate, NULL); + } + + /* white cursor, black outline */ + xw.pointerisvisible = 1; + xw.vpointer = XCreateFontCursor(xw.dpy, mouseshape); + XDefineCursor(xw.dpy, xw.win, xw.vpointer); + + if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) { + xmousefg.red = 0xffff; + xmousefg.green = 0xffff; + xmousefg.blue = 0xffff; + } + + if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) { + xmousebg.red = 0x0000; + xmousebg.green = 0x0000; + xmousebg.blue = 0x0000; + } + + XRecolorCursor(xw.dpy, xw.vpointer, &xmousefg, &xmousebg); + blankpm = XCreateBitmapFromData(xw.dpy, xw.win, &(char){0}, 1, 1); + xw.bpointer = XCreatePixmapCursor(xw.dpy, blankpm, blankpm, + &xmousefg, &xmousebg, 0, 0); + + xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False); + xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False); + xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False); + xw.netwmiconname = XInternAtom(xw.dpy, "_NET_WM_ICON_NAME", False); + XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1); + + xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False); + XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32, + PropModeReplace, (uchar *)&thispid, 1); + + win.mode = MODE_NUMLOCK; + resettitle(); + xhints(); + XMapWindow(xw.dpy, xw.win); + XSync(xw.dpy, False); + + clock_gettime(CLOCK_MONOTONIC, &xsel.tclick1); + clock_gettime(CLOCK_MONOTONIC, &xsel.tclick2); + xsel.primary = NULL; + xsel.clipboard = NULL; + xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0); + if (xsel.xtarget == None) + xsel.xtarget = XA_STRING; +} + +int +xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y) +{ + float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp; + ushort mode, prevmode = USHRT_MAX; + Font *font = &dc.font; + int frcflags = FRC_NORMAL; + float runewidth = win.cw; + Rune rune; + FT_UInt glyphidx; + FcResult fcres; + FcPattern *fcpattern, *fontpattern; + FcFontSet *fcsets[] = { NULL }; + FcCharSet *fccharset; + int i, f, numspecs = 0; + + for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) { + /* Fetch rune and mode for current glyph. */ + rune = glyphs[i].u; + mode = glyphs[i].mode; + + /* Skip dummy wide-character spacing. */ + if (mode == ATTR_WDUMMY) + continue; + + /* Determine font for glyph if different from previous glyph. */ + if (prevmode != mode) { + prevmode = mode; + font = &dc.font; + frcflags = FRC_NORMAL; + runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f); + if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) { + font = &dc.ibfont; + frcflags = FRC_ITALICBOLD; + } else if (mode & ATTR_ITALIC) { + font = &dc.ifont; + frcflags = FRC_ITALIC; + } else if (mode & ATTR_BOLD) { + font = &dc.bfont; + frcflags = FRC_BOLD; + } + yp = winy + font->ascent; + } + + /* Lookup character index with default font. */ + glyphidx = XftCharIndex(xw.dpy, font->match, rune); + if (glyphidx) { + specs[numspecs].font = font->match; + specs[numspecs].glyph = glyphidx; + specs[numspecs].x = (short)xp; + specs[numspecs].y = (short)yp; + xp += runewidth; + numspecs++; + continue; + } + + /* Fallback on font cache, search the font cache for match. */ + for (f = 0; f < frclen; f++) { + glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune); + /* Everything correct. */ + if (glyphidx && frc[f].flags == frcflags) + break; + /* We got a default font for a not found glyph. */ + if (!glyphidx && frc[f].flags == frcflags + && frc[f].unicodep == rune) { + break; + } + } + + /* Nothing was found. Use fontconfig to find matching font. */ + if (f >= frclen) { + if (!font->set) + font->set = FcFontSort(0, font->pattern, + 1, 0, &fcres); + fcsets[0] = font->set; + + /* + * Nothing was found in the cache. Now use + * some dozen of Fontconfig calls to get the + * font for one single character. + * + * Xft and fontconfig are design failures. + */ + fcpattern = FcPatternDuplicate(font->pattern); + fccharset = FcCharSetCreate(); + + FcCharSetAddChar(fccharset, rune); + FcPatternAddCharSet(fcpattern, FC_CHARSET, + fccharset); + FcPatternAddBool(fcpattern, FC_SCALABLE, 1); + + FcConfigSubstitute(0, fcpattern, + FcMatchPattern); + FcDefaultSubstitute(fcpattern); + + fontpattern = FcFontSetMatch(0, fcsets, 1, + fcpattern, &fcres); + + /* Allocate memory for the new cache entry. */ + if (frclen >= frccap) { + frccap += 16; + frc = xrealloc(frc, frccap * sizeof(Fontcache)); + } + + frc[frclen].font = XftFontOpenPattern(xw.dpy, + fontpattern); + if (!frc[frclen].font) + die("XftFontOpenPattern failed seeking fallback font: %s\n", + strerror(errno)); + frc[frclen].flags = frcflags; + frc[frclen].unicodep = rune; + + glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune); + + f = frclen; + frclen++; + + FcPatternDestroy(fcpattern); + FcCharSetDestroy(fccharset); + } + + specs[numspecs].font = frc[f].font; + specs[numspecs].glyph = glyphidx; + specs[numspecs].x = (short)xp; + specs[numspecs].y = (short)yp; + xp += runewidth; + numspecs++; + } + + return numspecs; +} + +void +xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y) +{ + int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1); + int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, + width = charlen * win.cw; + Color *fg, *bg, *temp, revfg, revbg, truefg, truebg; + XRenderColor colfg, colbg; + XRectangle r; + + /* Fallback on color display for attributes not supported by the font */ + if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) { + if (dc.ibfont.badslant || dc.ibfont.badweight) + base.fg = defaultattr; + } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) || + (base.mode & ATTR_BOLD && dc.bfont.badweight)) { + base.fg = defaultattr; + } + + if (IS_TRUECOL(base.fg)) { + colfg.alpha = 0xffff; + colfg.red = TRUERED(base.fg); + colfg.green = TRUEGREEN(base.fg); + colfg.blue = TRUEBLUE(base.fg); + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg); + fg = &truefg; + } else { + fg = &dc.col[base.fg]; + } + + if (IS_TRUECOL(base.bg)) { + colbg.alpha = 0xffff; + colbg.green = TRUEGREEN(base.bg); + colbg.red = TRUERED(base.bg); + colbg.blue = TRUEBLUE(base.bg); + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg); + bg = &truebg; + } else { + bg = &dc.col[base.bg]; + } + + /* Change basic system colors [0-7] to bright system colors [8-15] */ + if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7)) + fg = &dc.col[base.fg + 8]; + + if (IS_SET(MODE_REVERSE)) { + if (fg == &dc.col[defaultfg]) { + fg = &dc.col[defaultbg]; + } else { + colfg.red = ~fg->color.red; + colfg.green = ~fg->color.green; + colfg.blue = ~fg->color.blue; + colfg.alpha = fg->color.alpha; + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, + &revfg); + fg = &revfg; + } + + if (bg == &dc.col[defaultbg]) { + bg = &dc.col[defaultfg]; + } else { + colbg.red = ~bg->color.red; + colbg.green = ~bg->color.green; + colbg.blue = ~bg->color.blue; + colbg.alpha = bg->color.alpha; + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, + &revbg); + bg = &revbg; + } + } + + if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) { + colfg.red = fg->color.red / 2; + colfg.green = fg->color.green / 2; + colfg.blue = fg->color.blue / 2; + colfg.alpha = fg->color.alpha; + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg); + fg = &revfg; + } + + if (base.mode & ATTR_REVERSE) { + temp = fg; + fg = bg; + bg = temp; + } + + if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK) + fg = bg; + + if (base.mode & ATTR_INVISIBLE) + fg = bg; + + /* Intelligent cleaning up of the borders. */ + if (x == 0) { + xclear(0, (y == 0)? 0 : winy, borderpx, + winy + win.ch + + ((winy + win.ch >= borderpx + win.th)? win.h : 0)); + } + if (winx + width >= borderpx + win.tw) { + xclear(winx + width, (y == 0)? 0 : winy, win.w, + ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch))); + } + if (y == 0) + xclear(winx, 0, winx + width, borderpx); + if (winy + win.ch >= borderpx + win.th) + xclear(winx, winy + win.ch, winx + width, win.h); + + /* Clean up the region we want to draw to. */ + XftDrawRect(xw.draw, bg, winx, winy, width, win.ch); + + /* Set the clip region because Xft is sometimes dirty. */ + r.x = 0; + r.y = 0; + r.height = win.ch; + r.width = width; + XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1); + + /* Render the glyphs. */ + XftDrawGlyphFontSpec(xw.draw, fg, specs, len); + + /* Render underline and strikethrough. */ + if (base.mode & ATTR_UNDERLINE) { + XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent * chscale + 1, + width, 1); + } + + if (base.mode & ATTR_STRUCK) { + XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent * chscale / 3, + width, 1); + } + + /* Reset clip to none. */ + XftDrawSetClip(xw.draw, 0); +} + +void +xdrawglyph(Glyph g, int x, int y) +{ + int numspecs; + XftGlyphFontSpec spec; + + numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y); + xdrawglyphfontspecs(&spec, g, numspecs, x, y); +} + +void +xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og) +{ + Color drawcol; + XRenderColor colbg; + + /* remove the old cursor */ + if (selected(ox, oy)) + og.mode ^= ATTR_REVERSE; + xdrawglyph(og, ox, oy); + + if (IS_SET(MODE_HIDE)) + return; + + /* + * Select the right color for the right mode. + */ + g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE; + + if (IS_SET(MODE_REVERSE)) { + g.mode |= ATTR_REVERSE; + g.bg = defaultfg; + if (selected(cx, cy)) { + drawcol = dc.col[defaultcs]; + g.fg = defaultrcs; + } else { + drawcol = dc.col[defaultrcs]; + g.fg = defaultcs; + } + } else { + if (selected(cx, cy)) { + g.fg = defaultfg; + g.bg = defaultrcs; + } else { + /** this is the main part of the dynamic cursor color patch */ + g.bg = g.fg; + g.fg = defaultbg; + } + + /** + * and this is the second part of the dynamic cursor color patch. + * it handles the `drawcol` variable + */ + if (IS_TRUECOL(g.bg)) { + colbg.alpha = 0xffff; + colbg.red = TRUERED(g.bg); + colbg.green = TRUEGREEN(g.bg); + colbg.blue = TRUEBLUE(g.bg); + XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &drawcol); + } else { + drawcol = dc.col[g.bg]; + } + } + + /* draw the new one */ + if (IS_SET(MODE_FOCUSED)) { + switch (win.cursor) { + default: + case 0: /* blinking block */ + case 1: /* blinking block (default) */ + if (IS_SET(MODE_BLINK)) + break; + /* FALLTHROUGH */ + case 2: /* steady block */ + xdrawglyph(g, cx, cy); + break; + case 3: /* blinking underline */ + if (IS_SET(MODE_BLINK)) + break; + /* FALLTHROUGH */ + case 4: /* steady underline */ + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + (cy + 1) * win.ch - \ + cursorthickness, + win.cw, cursorthickness); + break; + case 5: /* blinking bar */ + if (IS_SET(MODE_BLINK)) + break; + /* FALLTHROUGH */ + case 6: /* steady bar */ + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + cy * win.ch, + cursorthickness, win.ch); + break; + case 7: /* blinking st cursor */ + if (IS_SET(MODE_BLINK)) + break; + /* FALLTHROUGH */ + case 8: /* steady st cursor */ + g.u = stcursor; + xdrawglyph(g, cx, cy); + break; + } + } else { + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + cy * win.ch, + win.cw - 1, 1); + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + cy * win.ch, + 1, win.ch - 1); + XftDrawRect(xw.draw, &drawcol, + borderpx + (cx + 1) * win.cw - 1, + borderpx + cy * win.ch, + 1, win.ch - 1); + XftDrawRect(xw.draw, &drawcol, + borderpx + cx * win.cw, + borderpx + (cy + 1) * win.ch - 1, + win.cw, 1); + } +} + +void +xsetenv(void) +{ + char buf[sizeof(long) * 8 + 1]; + + snprintf(buf, sizeof(buf), "%lu", xw.win); + setenv("WINDOWID", buf, 1); +} + +void +xseticontitle(char *p) +{ + XTextProperty prop; + DEFAULT(p, opt_title); + + if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle, + &prop) != Success) + return; + XSetWMIconName(xw.dpy, xw.win, &prop); + XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmiconname); + XFree(prop.value); +} + +void +xsettitle(char *p) +{ + XTextProperty prop; + DEFAULT(p, opt_title); + + if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle, + &prop) != Success) + return; + XSetWMName(xw.dpy, xw.win, &prop); + XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname); + XFree(prop.value); +} + +int +xstartdraw(void) +{ + return IS_SET(MODE_VISIBLE); +} + +void +xdrawline(Line line, int x1, int y1, int x2) +{ + int i, x, ox, numspecs; + Glyph base, new; + XftGlyphFontSpec *specs = xw.specbuf; + + numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1); + i = ox = 0; + for (x = x1; x < x2 && i < numspecs; x++) { + new = line[x]; + if (new.mode == ATTR_WDUMMY) + continue; + if (selected(x, y1)) + new.mode ^= ATTR_REVERSE; + if (i > 0 && ATTRCMP(base, new)) { + xdrawglyphfontspecs(specs, base, i, ox, y1); + specs += i; + numspecs -= i; + i = 0; + } + if (i == 0) { + ox = x; + base = new; + } + i++; + } + if (i > 0) + xdrawglyphfontspecs(specs, base, i, ox, y1); +} + +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); +} + +void +xximspot(int x, int y) +{ + if (xw.ime.xic == NULL) + return; + + xw.ime.spot.x = borderpx + x * win.cw; + xw.ime.spot.y = borderpx + (y + 1) * win.ch; + + XSetICValues(xw.ime.xic, XNPreeditAttributes, xw.ime.spotlist, NULL); +} + +void +expose(XEvent *ev) +{ + redraw(); +} + +void +visibility(XEvent *ev) +{ + XVisibilityEvent *e = &ev->xvisibility; + + MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE); +} + +void +unmap(XEvent *ev) +{ + win.mode &= ~MODE_VISIBLE; +} + +void +xsetpointermotion(int set) +{ + if (!set && !xw.pointerisvisible) + return; + MODBIT(xw.attrs.event_mask, set, PointerMotionMask); + XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs); +} + +void +xsetmode(int set, unsigned int flags) +{ + int mode = win.mode; + MODBIT(win.mode, set, flags); + if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE)) + redraw(); +} + +int +xsetcursor(int cursor) +{ + if (!BETWEEN(cursor, 0, 8)) /* 7-8: st extensions */ + return 1; + win.cursor = cursor; + cursorblinks = win.cursor == 0 || win.cursor == 1 || + win.cursor == 3 || win.cursor == 5 || + win.cursor == 7; + return 0; +} + +void +xseturgency(int add) +{ + XWMHints *h = XGetWMHints(xw.dpy, xw.win); + + MODBIT(h->flags, add, XUrgencyHint); + XSetWMHints(xw.dpy, xw.win, h); + XFree(h); +} + +void +xbell(void) +{ + if (!(IS_SET(MODE_FOCUSED))) + xseturgency(1); + if (bellvolume) + XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL); +} + +void +focus(XEvent *ev) +{ + XFocusChangeEvent *e = &ev->xfocus; + + if (e->mode == NotifyGrab) + return; + + if (ev->type == FocusIn) { + if (xw.ime.xic) + XSetICFocus(xw.ime.xic); + win.mode |= MODE_FOCUSED; + xseturgency(0); + if (IS_SET(MODE_FOCUS)) + ttywrite("\033[I", 3, 0); + if (!focused) { + focused = 1; + xloadcols(); + tfulldirt(); + } + } else { + if (xw.ime.xic) + XUnsetICFocus(xw.ime.xic); + win.mode &= ~MODE_FOCUSED; + if (IS_SET(MODE_FOCUS)) + ttywrite("\033[O", 3, 0); + if (focused) { + focused = 0; + xloadcols(); + tfulldirt(); + } + } +} + +int +match(uint mask, uint state) +{ + return mask == XK_ANY_MOD || mask == (state & ~ignoremod); +} + +char* +kmap(KeySym k, uint state) +{ + Key *kp; + int i; + + /* Check for mapped keys out of X11 function keys. */ + for (i = 0; i < LEN(mappedkeys); i++) { + if (mappedkeys[i] == k) + break; + } + if (i == LEN(mappedkeys)) { + if ((k & 0xFFFF) < 0xFD00) + return NULL; + } + + for (kp = key; kp < key + LEN(key); kp++) { + if (kp->k != k) + continue; + + if (!match(kp->mask, state)) + continue; + + if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0) + continue; + if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2) + continue; + + if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0) + continue; + + return kp->s; + } + + return NULL; +} + +void +kpress(XEvent *ev) +{ + XKeyEvent *e = &ev->xkey; + KeySym ksym; + char buf[64], *customkey; + int len; + Rune c; + Status status; + Shortcut *bp; + + if (xw.pointerisvisible) { + XDefineCursor(xw.dpy, xw.win, xw.bpointer); + xsetpointermotion(1); + xw.pointerisvisible = 0; + } + + if (IS_SET(MODE_KBDLOCK)) + return; + + if (xw.ime.xic) + len = XmbLookupString(xw.ime.xic, e, buf, sizeof buf, &ksym, &status); + else + len = XLookupString(e, buf, sizeof buf, &ksym, NULL); + /* 1. shortcuts */ + for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) { + if (ksym == bp->keysym && match(bp->mod, e->state)) { + bp->func(&(bp->arg)); + return; + } + } + + /* 2. custom keys from config.h */ + if ((customkey = kmap(ksym, e->state))) { + ttywrite(customkey, strlen(customkey), 1); + return; + } + + /* 3. composed string from input method */ + if (len == 0) + return; + if (len == 1 && e->state & Mod1Mask) { + if (IS_SET(MODE_8BIT)) { + if (*buf < 0177) { + c = *buf | 0x80; + len = utf8encode(c, buf); + } + } else { + buf[1] = buf[0]; + buf[0] = '\033'; + len = 2; + } + } + ttywrite(buf, len, 1); +} + +void +cmessage(XEvent *e) +{ + /* + * See xembed specs + * http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html + */ + if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) { + if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) { + win.mode |= MODE_FOCUSED; + xseturgency(0); + } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) { + win.mode &= ~MODE_FOCUSED; + } + } else if (e->xclient.data.l[0] == xw.wmdeletewin) { + ttyhangup(); + exit(0); + } +} + +void +resize(XEvent *e) +{ + if (e->xconfigure.width == win.w && e->xconfigure.height == win.h) + return; + + cresize(e->xconfigure.width, e->xconfigure.height); +} + +void +run(void) +{ + XEvent ev; + int w = win.w, h = win.h; + fd_set rfd; + int xfd = XConnectionNumber(xw.dpy), ttyfd, xev, drawing; + struct timespec seltv, *tv, now, lastblink, trigger; + double timeout; + + /* Waiting for window mapping */ + do { + XNextEvent(xw.dpy, &ev); + /* + * This XFilterEvent call is required because of XOpenIM. It + * does filter out the key event and some client message for + * the input method too. + */ + if (XFilterEvent(&ev, None)) + continue; + if (ev.type == ConfigureNotify) { + w = ev.xconfigure.width; + h = ev.xconfigure.height; + } + } while (ev.type != MapNotify); + + ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd); + cresize(w, h); + + for (timeout = -1, drawing = 0, lastblink = (struct timespec){0};;) { + FD_ZERO(&rfd); + FD_SET(ttyfd, &rfd); + FD_SET(xfd, &rfd); + + if (XPending(xw.dpy)) + timeout = 0; /* existing events might not set xfd */ + + seltv.tv_sec = timeout / 1E3; + seltv.tv_nsec = 1E6 * (timeout - 1E3 * seltv.tv_sec); + tv = timeout >= 0 ? &seltv : NULL; + + if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) { + if (errno == EINTR) + continue; + die("select failed: %s\n", strerror(errno)); + } + clock_gettime(CLOCK_MONOTONIC, &now); + + if (FD_ISSET(ttyfd, &rfd)) + ttyread(); + + xev = 0; + while (XPending(xw.dpy)) { + xev = 1; + XNextEvent(xw.dpy, &ev); + if (XFilterEvent(&ev, None)) + continue; + if (handler[ev.type]) + (handler[ev.type])(&ev); + } + + /* + * To reduce flicker and tearing, when new content or event + * triggers drawing, we first wait a bit to ensure we got + * everything, and if nothing new arrives - we draw. + * We start with trying to wait minlatency ms. If more content + * arrives sooner, we retry with shorter and shorter periods, + * and eventually draw even without idle after maxlatency ms. + * Typically this results in low latency while interacting, + * maximum latency intervals during `cat huge.txt`, and perfect + * sync with periodic updates from animations/key-repeats/etc. + */ + if (FD_ISSET(ttyfd, &rfd) || xev) { + if (!drawing) { + trigger = now; + if (IS_SET(MODE_BLINK)) { + win.mode ^= MODE_BLINK; + } + lastblink = now; + drawing = 1; + } + timeout = (maxlatency - TIMEDIFF(now, trigger)) \ + / maxlatency * minlatency; + if (timeout > 0) + continue; /* we have time, try to find idle */ + } + + /* idle detected or maxlatency exhausted -> draw */ + timeout = -1; + if (blinktimeout && (cursorblinks || tattrset(ATTR_BLINK))) { + timeout = blinktimeout - TIMEDIFF(now, lastblink); + if (timeout <= 0) { + if (-timeout > blinktimeout) /* start visible */ + win.mode |= MODE_BLINK; + win.mode ^= MODE_BLINK; + tsetdirtattr(ATTR_BLINK); + lastblink = now; + timeout = blinktimeout; + } + } + + draw(); + XFlush(xw.dpy); + drawing = 0; + } +} + +#define XRESOURCE_LOAD_META(NAME) \ + if(!XrmGetResource(xrdb, "st." NAME, "st." NAME, &type, &ret)) \ + XrmGetResource(xrdb, "*." NAME, "*." NAME, &type, &ret); \ + if (ret.addr != NULL && !strncmp("String", type, 64)) + +#define XRESOURCE_LOAD_STRING(NAME, DST) \ + XRESOURCE_LOAD_META(NAME) \ + DST = ret.addr; + +#define XRESOURCE_LOAD_CHAR(NAME, DST) \ + XRESOURCE_LOAD_META(NAME) \ + DST = ret.addr[0]; + +#define XRESOURCE_LOAD_INTEGER(NAME, DST) \ + XRESOURCE_LOAD_META(NAME) \ + DST = strtoul(ret.addr, NULL, 10); + +#define XRESOURCE_LOAD_FLOAT(NAME, DST) \ + XRESOURCE_LOAD_META(NAME) \ + DST = strtof(ret.addr, NULL); + +void +xrdb_load(void) +{ + /* XXX */ + char *xrm; + char *type; + XrmDatabase xrdb; + XrmValue ret; + Display *dpy; + + if(!(dpy = XOpenDisplay(NULL))) + die("Can't open display\n"); + + XrmInitialize(); + xrm = XResourceManagerString(dpy); + + if (xrm != NULL) { + xrdb = XrmGetStringDatabase(xrm); + + /* handling colors here without macros to do via loop. */ + int i = 0; + char loadValue[12] = ""; + for (i = 0; i < 256; i++) + { + sprintf(loadValue, "%s%d", "st.color", i); + + if(!XrmGetResource(xrdb, loadValue, loadValue, &type, &ret)) + { + sprintf(loadValue, "%s%d", "*.color", i); + if (!XrmGetResource(xrdb, loadValue, loadValue, &type, &ret)) + /* reset if not found (unless in range for defaults). */ + if (i > 15) + colorname[i] = NULL; + } + + if (ret.addr != NULL && !strncmp("String", type, 64)) + colorname[i] = ret.addr; + } + + XRESOURCE_LOAD_STRING("foreground", colorname[defaultfg]); + XRESOURCE_LOAD_STRING("background", colorname[defaultbg]); + XRESOURCE_LOAD_STRING("cursorfg", colorname[defaultcs]) + else { + // this looks confusing because we are chaining off of the if + // in the macro. probably we should be wrapping everything blocks + // so this isn't possible... + defaultcs = defaultfg; + } + XRESOURCE_LOAD_STRING("reverse-cursor", colorname[defaultrcs]) + else { + // see above. + defaultrcs = defaultbg; + } + + XRESOURCE_LOAD_STRING("font", font); + XRESOURCE_LOAD_STRING("termname", termname); + + /* XRESOURCE_LOAD_INTEGER("xfps", xfps); */ + /* XRESOURCE_LOAD_INTEGER("actionfps", actionfps); */ + XRESOURCE_LOAD_INTEGER("blinktimeout", blinktimeout); + XRESOURCE_LOAD_INTEGER("bellvolume", bellvolume); + XRESOURCE_LOAD_INTEGER("borderpx", borderpx); + /* XRESOURCE_LOAD_INTEGER("borderless", borderless); */ + XRESOURCE_LOAD_INTEGER("cursorstyle", cursorstyle); + + /* cursorblinkstate = 1; // in case if cursor shape was changed from a blinking one to a non-blinking */ + /* XRESOURCE_LOAD_INTEGER("cursorthickness", cursorthickness); */ + /* XRESOURCE_LOAD_INTEGER("cursorblinkstyle", cursorblinkstyle); */ + /* XRESOURCE_LOAD_INTEGER("cursorblinkontype", cursorblinkontype); */ + + /* todo: https://github.com/gnotclub/xst/commit/1e82647b0e04077e975679a4b4cf1eb02b04e6bc */ + /* XRESOURCE_LOAD_INTEGER("mouseScrollLines", mousescrolllines); */ + + XRESOURCE_LOAD_FLOAT("cwscale", cwscale); + XRESOURCE_LOAD_FLOAT("chscale", chscale); + + /* XRESOURCE_LOAD_CHAR("prompt_char", prompt_char); */ + + } + XFlush(dpy); +} + +void +reload(int sig) +{ + xrdb_load(); + + /* colors, fonts */ + xloadcols(); + xunloadfonts(); + xloadfonts(font, 0); + + /* pretend the window just got resized */ + cresize(win.w, win.h); + + redraw(); + + /* triggers re-render if we're visible. */ + ttywrite("\033[O", 3, 1); + + signal(SIGUSR1, reload); +} + +void +usage(void) +{ + die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]" + " [-n name] [-o file]\n" + " [-T title] [-t title] [-w windowid]" + " [[-e] command [args ...]]\n" + " %s [-aiv] [-c class] [-f font] [-g geometry]" + " [-n name] [-o file]\n" + " [-T title] [-t title] [-w windowid] -l line" + " [stty_args ...]\n", argv0, argv0); +} + +int +main(int argc, char *argv[]) +{ + xw.l = xw.t = 0; + xw.isfixed = False; + xsetcursor(cursorstyle); + + ARGBEGIN { + case 'a': + allowaltscreen = 0; + break; + case 'A': + opt_alpha = EARGF(usage()); + break; + case 'c': + opt_class = EARGF(usage()); + break; + case 'e': + if (argc > 0) + --argc, ++argv; + goto run; + case 'f': + opt_font = EARGF(usage()); + break; + case 'g': + xw.gm = XParseGeometry(EARGF(usage()), + &xw.l, &xw.t, &cols, &rows); + break; + case 'i': + xw.isfixed = 1; + break; + case 'o': + opt_io = EARGF(usage()); + break; + case 'l': + opt_line = EARGF(usage()); + break; + case 'n': + opt_name = EARGF(usage()); + break; + case 't': + case 'T': + opt_title = EARGF(usage()); + break; + case 'w': + opt_embed = EARGF(usage()); + break; + case 'v': + die("%s " VERSION "\n", argv0); + break; + default: + usage(); + } ARGEND; + +run: + if (argc > 0) /* eat all remaining arguments */ + opt_cmd = argv; + + if (!opt_title) + opt_title = (opt_line || !opt_cmd) ? "st" : opt_cmd[0]; + + setlocale(LC_CTYPE, ""); + XSetLocaleModifiers(""); + xrdb_load(); + signal(SIGUSR1, reload); + cols = MAX(cols, 1); + rows = MAX(rows, 1); + defaultbg = MAX(LEN(colorname), 256); + tnew(cols, rows); + xinit(cols, rows); + xsetenv(); + selinit(); + run(); + + return 0; +}