changed st font size

Fix buffer overflow in input handling

.gitignore

@@ -0,0 +1,5 @@
+patches/
+.gitignore
+*.o
+st
+*.orig

FAQ

@@ -1,250 +0,0 @@
-## Why does st not handle utmp entries?
-
-Use the excellent tool of [utmp](https://git.suckless.org/utmp/) for this task.
-
-
-## Some _random program_ complains that st is unknown/not recognised/unsupported/whatever!
-
-It means that st doesn’t have any terminfo entry on your system. Chances are
-you did not `make install`. If you just want to test it without installing it,
-you can manually run `tic -sx st.info`.
-
-
-## Nothing works, and nothing is said about an unknown terminal!
-
-* Some programs just assume they’re running in xterm i.e. they don’t rely on
-  terminfo. What you see is the current state of the “xterm compliance”.
-* Some programs don’t complain about the lacking st description and default to
-  another terminal. In that case see the question about terminfo.
-
-
-## How do I scroll back up?
-
-* Using a terminal multiplexer.
-	* `st -e tmux` using C-b [
-	* `st -e screen` using C-a ESC
-* Using the excellent tool of [scroll](https://git.suckless.org/scroll/).
-* Using the scrollback [patch](https://st.suckless.org/patches/scrollback/).
-
-
-## I would like to have utmp and/or scroll functionality by default
-
-You can add the absolute path of both programs in your config.h file. You only
-have to modify the value of utmp and scroll variables.
-
-
-## Why doesn't the Del key work in some programs?
-
-Taken from the terminfo manpage:
-
-	If the terminal has a keypad that transmits codes when the keys
-	are pressed, this information can be given. Note that it is not
-	possible to handle terminals where the keypad only works in
-	local (this applies, for example, to the unshifted HP 2621 keys).
-	If the keypad can be set to transmit or not transmit, give these
-	codes as smkx and rmkx. Otherwise the keypad is assumed to
-	always transmit.
-
-In the st case smkx=E[?1hE= and rmkx=E[?1lE>, so it is mandatory that
-applications which want to test against keypad keys send these
-sequences.
-
-But buggy applications (like bash and irssi, for example) don't do this. A fast
-solution for them is to use the following command:
-
-	$ printf '\033[?1h\033=' >/dev/tty
-
-or
-	$ tput smkx
-
-In the case of bash, readline is used. Readline has a different note in its
-manpage about this issue:
-
-	enable-keypad (Off)
-		When set to On, readline will try to enable the
-		application keypad when it is called. Some systems
-		need this to enable arrow keys.
-
-Adding this option to your .inputrc will fix the keypad problem for all
-applications using readline.
-
-If you are using zsh, then read the zsh FAQ
-<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.

FUNDING.yml

@@ -0,0 +1,2 @@
+custom: ["https://lukesmith.xyz/donate.html"]
+github: lukesmithxyz

LEGACY

@@ -1,17 +0,0 @@
-A STATEMENT ON LEGACY SUPPORT
-
-In the terminal world there is much cruft that comes from old and unsup‐
-ported terminals that inherit incompatible modes  and  escape  sequences
-which noone is able to know, except when he/she comes from that time and
-developed a graphical vt100 emulator at that time.
-
-One  goal  of  st is to only support what is really needed. When you en‐
-counter a sequence which you really need, implement it.  But  while  you
-are  at it,  do not add the other cruft you might encounter while sneek‐
-ing at other terminal emulators. History has bloated them and  there  is
-no real evidence that most of the sequences are used today.
-
-
-Christoph Lohmann <20h@r-36.net>
-2012-09-13T07:00:36.081271045+02:00
-

Makefile

@@ -4,7 +4,7 @@
 
 include config.mk
 
-SRC = st.c x.c
+SRC = st.c x.c boxdraw.c hb.c
 OBJ = $(SRC:.c=.o)
 
 all: options st
@@ -15,14 +15,13 @@ options:
 	@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
+x.o: arg.h config.h st.h win.h hb.h
+hb.o: st.h
+boxdraw.o: config.h st.h boxdraw_data.h
 
 $(OBJ): config.h config.mk
 
@@ -30,12 +29,12 @@ st: $(OBJ)
 	$(CC) -o $@ $(OBJ) $(STLDFLAGS)
 
 clean:
-	rm -f st $(OBJ) st-$(VERSION).tar.gz
+	rm -f st $(OBJ) st-$(VERSION).tar.gz *.rej *.orig *.o
 
 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)\
+		config.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)
@@ -43,7 +42,11 @@ dist: clean
 install: st
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
 	cp -f st $(DESTDIR)$(PREFIX)/bin
+	cp -f st-copyout $(DESTDIR)$(PREFIX)/bin
+	cp -f st-urlhandler $(DESTDIR)$(PREFIX)/bin
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/st
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/st-copyout
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/st-urlhandler
 	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
 	sed "s/VERSION/$(VERSION)/g" < st.1 > $(DESTDIR)$(MANPREFIX)/man1/st.1
 	chmod 644 $(DESTDIR)$(MANPREFIX)/man1/st.1
@@ -52,6 +55,8 @@ install: st
 
 uninstall:
 	rm -f $(DESTDIR)$(PREFIX)/bin/st
+	rm -f $(DESTDIR)$(PREFIX)/bin/st-copyout
+	rm -f $(DESTDIR)$(PREFIX)/bin/st-urlhandler
 	rm -f $(DESTDIR)$(MANPREFIX)/man1/st.1
 
 .PHONY: all options clean dist install uninstall

PKGBUILD

@@ -0,0 +1,45 @@
+# Maintainer:
+
+pkgname=st-luke-git
+_pkgname=st
+pkgver=0.8.2.r1062.2087ab9
+pkgrel=1
+epoch=1
+pkgdesc="Luke's simple (suckless) terminal with vim-bindings, transparency, xresources, etc. "
+url='https://github.com/LukeSmithxyz/st'
+arch=('i686' 'x86_64')
+license=('MIT')
+options=('zipman')
+depends=('libxft')
+makedepends=('ncurses' 'libxext' 'git')
+optdepends=('dmenu: feed urls to dmenu')
+source=(git+https://github.com/LukeSmithxyz/st)
+sha1sums=('SKIP')
+
+provides=("${_pkgname}")
+conflicts=("${_pkgname}")
+
+pkgver() {
+	cd "${_pkgname}"
+	printf "%s.r%s.%s" "$(awk '/^VERSION =/ {print $3}' config.mk)" \
+		"$(git rev-list --count HEAD)" "$(git rev-parse --short HEAD)"
+}
+
+prepare() {
+	cd $srcdir/${_pkgname}
+	# skip terminfo which conflicts with ncurses
+	sed -i '/tic /d' Makefile
+}
+
+build() {
+	cd "${_pkgname}"
+	make X11INC=/usr/include/X11 X11LIB=/usr/lib/X11
+}
+
+package() {
+	cd "${_pkgname}"
+	make PREFIX=/usr DESTDIR="${pkgdir}" install
+	install -Dm644 LICENSE "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
+	install -Dm644 README.md "${pkgdir}/usr/share/doc/${pkgname}/README.md"
+	install -Dm644 Xdefaults "${pkgdir}/usr/share/doc/${pkgname}/Xdefaults.example"
+}

README

@@ -1,34 +0,0 @@
-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.
-

README.md

@@ -0,0 +1,89 @@
+# Luke's build of st - the simple (suckless) terminal
+
+The [suckless terminal (st)](https://st.suckless.org/) with some additional
+features that make it literally the best terminal emulator ever:
+
+## Unique features (using dmenu)
+
++ **follow urls** by pressing `alt-l`
++ **copy urls** in the same way with `alt-y`
++ **copy the output of commands** with `alt-o`
+
+## Bindings for
+
++ **scrollback** with `alt-↑/↓` or `alt-pageup/down` or `shift` while scrolling the
+  mouse.
++ OR **vim-bindings**: scroll up/down in history with `alt-k` and `alt-j`.
+  Faster with `alt-u`/`alt-d`.
++ **zoom/change font size**: same bindings as above, but holding down shift as
+  well. `alt-home` returns to default
++ **copy text** with `alt-c`, **paste** is `alt-v` or `shift-insert`
+
+## Pretty stuff
+
++ Compatibility with `Xresources` and `pywal` for dynamic colors.
++ Default [gruvbox](https://github.com/morhetz/gruvbox) colors otherwise.
++ Transparency/alpha, which is also adjustable from your `Xresources`.
++ Default font is system "mono" at 14pt, meaning the font will match your
+  system font.
+
+## Other st patches
+
++ Boxdraw
++ Ligatures
++ font2
++ updated to latest version 0.8.5
+
+## Installation for newbs
+
+You should have xlib header files and libharfbuzz build files installed.
+
+```
+git clone https://github.com/LukeSmithxyz/st
+cd st
+sudo make install
+```
+
+Obviously, `make` is required to build. `fontconfig` is required for the
+default build, since it asks `fontconfig` for your system monospace font. It
+might be obvious, but `libX11` and `libXft` are required as well. Chances are,
+you have all of this installed already.
+
+On OpenBSD, be sure to edit `config.mk` first and remove `-lrt` from the
+`$LIBS` before compiling.
+
+Be sure to have a composite manager (`xcompmgr`, `picom`, etc.) running if you
+want transparency.
+
+## How to configure dynamically with Xresources
+
+For many key variables, this build of `st` will look for X settings set in
+either `~/.Xdefaults` or `~/.Xresources`. You must run `xrdb` on one of these
+files to load the settings.
+
+For example, you can define your desired fonts, transparency or colors:
+
+```
+*.font:	Liberation Mono:pixelsize=12:antialias=true:autohint=true;
+*.alpha: 0.9
+*.color0: #111
+...
+```
+
+The `alpha` value (for transparency) goes from `0` (transparent) to `1`
+(opaque). There is an example `Xdefaults` file in this respository.
+
+### Colors
+
+To be clear about the color settings:
+
+- This build will use gruvbox colors by default and as a fallback.
+- If there are Xresources colors defined, those will take priority.
+- But if `wal` has run in your session, its colors will take priority.
+
+Note that when you run `wal`, it will negate the transparency of existing windows, but new windows will continue with the previously defined transparency.
+
+## Contact
+
+- Luke Smith <luke@lukesmith.xyz>
+- [https://lukesmith.xyz](https://lukesmith.xyz)

TODO

@@ -1,28 +0,0 @@
-vt emulation
-------------
-
-* double-height support
-
-code & interface
-----------------
-
-* add a simple way to do multiplexing
-
-drawing
--------
-* add diacritics support to xdraws()
-	* switch to a suckless font drawing library
-* make the font cache simpler
-* add better support for brightening of the upper colors
-
-bugs
-----
-
-* fix shift up/down (shift selection in emacs)
-* remove DEC test sequence when appropriate
-
-misc
-----
-
-    $ grep -nE 'XXX|TODO' st.c
-

Xdefaults

@@ -0,0 +1,128 @@
+!! Transparency (0-1):
+st.alpha: 0.92
+st.alphaOffset: 0.3
+
+!! Set a default font and font size as below:
+st.font: Monospace-11;
+
+! st.termname: st-256color
+! st.borderpx: 2
+
+!! Set the background, foreground and cursor colors as below:
+
+!! gruvbox:
+*.color0: #1d2021
+*.color1: #cc241d
+*.color2: #98971a
+*.color3: #d79921
+*.color4: #458588
+*.color5: #b16286
+*.color6: #689d6a
+*.color7: #a89984
+*.color8: #928374
+*.color9: #fb4934
+*.color10: #b8bb26
+*.color11: #fabd2f
+*.color12: #83a598
+*.color13: #d3869b
+*.color14: #8ec07c
+*.color15: #ebdbb2
+*.background: #282828
+*.foreground: white
+*.cursorColor: white
+
+/* /1* !! gruvbox light: *1/ */
+/* *.color0: #fbf1c7 */
+/* *.color1: #cc241d */
+/* *.color2: #98971a */
+/* *.color3: #d79921 */
+/* *.color4: #458588 */
+/* *.color5: #b16286 */
+/* *.color6: #689d6a */
+/* *.color7: #7c6f64 */
+/* *.color8: #928374 */
+/* *.color9: #9d0006 */
+/* *.color10: #79740e */
+/* *.color11: #b57614 */
+/* *.color12: #076678 */
+/* *.color13: #8f3f71 */
+/* *.color14: #427b58 */
+/* *.color15: #3c3836 */
+/* *.background: #fbf1c7 */
+/* *.foreground: #282828 */
+/* *.cursorColor: #282828 */
+
+/* !! brogrammer: */
+/* *.foreground:  #d6dbe5 */
+/* *.background:  #131313 */
+/* *.color0:      #1f1f1f */
+/* *.color8:      #d6dbe5 */
+/* *.color1:      #f81118 */
+/* *.color9:      #de352e */
+/* *.color2:      #2dc55e */
+/* *.color10:     #1dd361 */
+/* *.color3:      #ecba0f */
+/* *.color11:     #f3bd09 */
+/* *.color4:      #2a84d2 */
+/* *.color12:     #1081d6 */
+/* *.color5:      #4e5ab7 */
+/* *.color13:     #5350b9 */
+/* *.color6:      #1081d6 */
+/* *.color14:     #0f7ddb */
+/* *.color7:      #d6dbe5 */
+/* *.color15:     #ffffff */
+/* *.colorBD:     #d6dbe5 */
+
+/* ! base16 */
+/* *.color0:       #181818 */
+/* *.color1:       #ab4642 */
+/* *.color2:       #a1b56c */
+/* *.color3:       #f7ca88 */
+/* *.color4:       #7cafc2 */
+/* *.color5:       #ba8baf */
+/* *.color6:       #86c1b9 */
+/* *.color7:       #d8d8d8 */
+/* *.color8:       #585858 */
+/* *.color9:       #ab4642 */
+/* *.color10:      #a1b56c */
+/* *.color11:      #f7ca88 */
+/* *.color12:      #7cafc2 */
+/* *.color13:      #ba8baf */
+/* *.color14:      #86c1b9 */
+/* *.color15:      #f8f8f8 */
+
+/* !! solarized */
+/* *.color0:	#073642 */
+/* *.color1:	#dc322f */
+/* *.color2:	#859900 */
+/* *.color3:	#b58900 */
+/* *.color4:	#268bd2 */
+/* *.color5:	#d33682 */
+/* *.color6:	#2aa198 */
+/* *.color7:	#eee8d5 */
+/* *.color9:	#cb4b16 */
+/* *.color8:	#fdf6e3 */
+/* *.color10:	#586e75 */
+/* *.color11:	#657b83 */
+/* *.color12:	#839496 */
+/* *.color13:	#6c71c4 */
+/* *.color14:	#93a1a1 */
+/* *.color15:	#fdf6e3 */
+
+/* !! xterm */
+/* *.color0:   #000000 */
+/* *.color1:   #cd0000 */
+/* *.color2:   #00cd00 */
+/* *.color3:   #cdcd00 */
+/* *.color4:   #0000cd */
+/* *.color5:   #cd00cd */
+/* *.color6:   #00cdcd */
+/* *.color7:   #e5e5e5 */
+/* *.color8:   #4d4d4d */
+/* *.color9:   #ff0000 */
+/* *.color10:  #00ff00 */
+/* *.color11:  #ffff00 */
+/* *.color12:  #0000ff */
+/* *.color13:  #ff00ff */
+/* *.color14:  #00ffff */
+/* *.color15:  #aabac8 */

boxdraw.c

@@ -0,0 +1,194 @@
+/*
+ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
+ * MIT/X Consortium License
+ */
+
+#include <X11/Xft/Xft.h>
+#include "st.h"
+#include "boxdraw_data.h"
+
+/* Rounded non-negative integers division of n / d  */
+#define DIV(n, d) (((n) + (d) / 2) / (d))
+
+static Display *xdpy;
+static Colormap xcmap;
+static XftDraw *xd;
+static Visual *xvis;
+
+static void drawbox(int, int, int, int, XftColor *, XftColor *, ushort);
+static void drawboxlines(int, int, int, int, XftColor *, ushort);
+
+/* public API */
+
+void
+boxdraw_xinit(Display *dpy, Colormap cmap, XftDraw *draw, Visual *vis)
+{
+	xdpy = dpy; xcmap = cmap; xd = draw, xvis = vis;
+}
+
+int
+isboxdraw(Rune u)
+{
+	Rune block = u & ~0xff;
+	return (boxdraw && block == 0x2500 && boxdata[(uint8_t)u]) ||
+	       (boxdraw_braille && block == 0x2800);
+}
+
+/* the "index" is actually the entire shape data encoded as ushort */
+ushort
+boxdrawindex(const Glyph *g)
+{
+	if (boxdraw_braille && (g->u & ~0xff) == 0x2800)
+		return BRL | (uint8_t)g->u;
+	if (boxdraw_bold && (g->mode & ATTR_BOLD))
+		return BDB | boxdata[(uint8_t)g->u];
+	return boxdata[(uint8_t)g->u];
+}
+
+void
+drawboxes(int x, int y, int cw, int ch, XftColor *fg, XftColor *bg,
+          const XftGlyphFontSpec *specs, int len)
+{
+	for ( ; len-- > 0; x += cw, specs++)
+		drawbox(x, y, cw, ch, fg, bg, (ushort)specs->glyph);
+}
+
+/* implementation */
+
+void
+drawbox(int x, int y, int w, int h, XftColor *fg, XftColor *bg, ushort bd)
+{
+	ushort cat = bd & ~(BDB | 0xff);  /* mask out bold and data */
+	if (bd & (BDL | BDA)) {
+		/* lines (light/double/heavy/arcs) */
+		drawboxlines(x, y, w, h, fg, bd);
+
+	} else if (cat == BBD) {
+		/* lower (8-X)/8 block */
+		int d = DIV((uint8_t)bd * h, 8);
+		XftDrawRect(xd, fg, x, y + d, w, h - d);
+
+	} else if (cat == BBU) {
+		/* upper X/8 block */
+		XftDrawRect(xd, fg, x, y, w, DIV((uint8_t)bd * h, 8));
+
+	} else if (cat == BBL) {
+		/* left X/8 block */
+		XftDrawRect(xd, fg, x, y, DIV((uint8_t)bd * w, 8), h);
+
+	} else if (cat == BBR) {
+		/* right (8-X)/8 block */
+		int d = DIV((uint8_t)bd * w, 8);
+		XftDrawRect(xd, fg, x + d, y, w - d, h);
+
+	} else if (cat == BBQ) {
+		/* Quadrants */
+		int w2 = DIV(w, 2), h2 = DIV(h, 2);
+		if (bd & TL)
+			XftDrawRect(xd, fg, x, y, w2, h2);
+		if (bd & TR)
+			XftDrawRect(xd, fg, x + w2, y, w - w2, h2);
+		if (bd & BL)
+			XftDrawRect(xd, fg, x, y + h2, w2, h - h2);
+		if (bd & BR)
+			XftDrawRect(xd, fg, x + w2, y + h2, w - w2, h - h2);
+
+	} else if (bd & BBS) {
+		/* Shades - data is 1/2/3 for 25%/50%/75% alpha, respectively */
+		int d = (uint8_t)bd;
+		XftColor xfc;
+		XRenderColor xrc = { .alpha = 0xffff };
+
+		xrc.red = DIV(fg->color.red * d + bg->color.red * (4 - d), 4);
+		xrc.green = DIV(fg->color.green * d + bg->color.green * (4 - d), 4);
+		xrc.blue = DIV(fg->color.blue * d + bg->color.blue * (4 - d), 4);
+
+		XftColorAllocValue(xdpy, xvis, xcmap, &xrc, &xfc);
+		XftDrawRect(xd, &xfc, x, y, w, h);
+		XftColorFree(xdpy, xvis, xcmap, &xfc);
+
+	} else if (cat == BRL) {
+		/* braille, each data bit corresponds to one dot at 2x4 grid */
+		int w1 = DIV(w, 2);
+		int h1 = DIV(h, 4), h2 = DIV(h, 2), h3 = DIV(3 * h, 4);
+
+		if (bd & 1)   XftDrawRect(xd, fg, x, y, w1, h1);
+		if (bd & 2)   XftDrawRect(xd, fg, x, y + h1, w1, h2 - h1);
+		if (bd & 4)   XftDrawRect(xd, fg, x, y + h2, w1, h3 - h2);
+		if (bd & 8)   XftDrawRect(xd, fg, x + w1, y, w - w1, h1);
+		if (bd & 16)  XftDrawRect(xd, fg, x + w1, y + h1, w - w1, h2 - h1);
+		if (bd & 32)  XftDrawRect(xd, fg, x + w1, y + h2, w - w1, h3 - h2);
+		if (bd & 64)  XftDrawRect(xd, fg, x, y + h3, w1, h - h3);
+		if (bd & 128) XftDrawRect(xd, fg, x + w1, y + h3, w - w1, h - h3);
+
+	}
+}
+
+void
+drawboxlines(int x, int y, int w, int h, XftColor *fg, ushort bd)
+{
+	/* s: stem thickness. width/8 roughly matches underscore thickness. */
+	/* We draw bold as 1.5 * normal-stem and at least 1px thicker.      */
+	/* doubles draw at least 3px, even when w or h < 3. bold needs 6px. */
+	int mwh = MIN(w, h);
+	int base_s = MAX(1, DIV(mwh, 8));
+	int bold = (bd & BDB) && mwh >= 6;  /* possibly ignore boldness */
+	int s = bold ? MAX(base_s + 1, DIV(3 * base_s, 2)) : base_s;
+	int w2 = DIV(w - s, 2), h2 = DIV(h - s, 2);
+	/* the s-by-s square (x + w2, y + h2, s, s) is the center texel.    */
+	/* The base length (per direction till edge) includes this square.  */
+
+	int light = bd & (LL | LU | LR | LD);
+	int double_ = bd & (DL | DU | DR | DD);
+
+	if (light) {
+		/* d: additional (negative) length to not-draw the center   */
+		/* texel - at arcs and avoid drawing inside (some) doubles  */
+		int arc = bd & BDA;
+		int multi_light = light & (light - 1);
+		int multi_double = double_ & (double_ - 1);
+		/* light crosses double only at DH+LV, DV+LH (ref. shapes)  */
+		int d = arc || (multi_double && !multi_light) ? -s : 0;
+
+		if (bd & LL)
+			XftDrawRect(xd, fg, x, y + h2, w2 + s + d, s);
+		if (bd & LU)
+			XftDrawRect(xd, fg, x + w2, y, s, h2 + s + d);
+		if (bd & LR)
+			XftDrawRect(xd, fg, x + w2 - d, y + h2, w - w2 + d, s);
+		if (bd & LD)
+			XftDrawRect(xd, fg, x + w2, y + h2 - d, s, h - h2 + d);
+	}
+
+	/* double lines - also align with light to form heavy when combined */
+	if (double_) {
+		/*
+		* going clockwise, for each double-ray: p is additional length
+		* to the single-ray nearer to the previous direction, and n to
+		* the next. p and n adjust from the base length to lengths
+		* which consider other doubles - shorter to avoid intersections
+		* (p, n), or longer to draw the far-corner texel (n).
+		*/
+		int dl = bd & DL, du = bd & DU, dr = bd & DR, dd = bd & DD;
+		if (dl) {
+			int p = dd ? -s : 0, n = du ? -s : dd ? s : 0;
+			XftDrawRect(xd, fg, x, y + h2 + s, w2 + s + p, s);
+			XftDrawRect(xd, fg, x, y + h2 - s, w2 + s + n, s);
+		}
+		if (du) {
+			int p = dl ? -s : 0, n = dr ? -s : dl ? s : 0;
+			XftDrawRect(xd, fg, x + w2 - s, y, s, h2 + s + p);
+			XftDrawRect(xd, fg, x + w2 + s, y, s, h2 + s + n);
+		}
+		if (dr) {
+			int p = du ? -s : 0, n = dd ? -s : du ? s : 0;
+			XftDrawRect(xd, fg, x + w2 - p, y + h2 - s, w - w2 + p, s);
+			XftDrawRect(xd, fg, x + w2 - n, y + h2 + s, w - w2 + n, s);
+		}
+		if (dd) {
+			int p = dr ? -s : 0, n = dl ? -s : dr ? s : 0;
+			XftDrawRect(xd, fg, x + w2 + s, y + h2 - p, s, h - h2 + p);
+			XftDrawRect(xd, fg, x + w2 - s, y + h2 - n, s, h - h2 + n);
+		}
+	}
+}

boxdraw_data.h

@@ -0,0 +1,214 @@
+/*
+ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
+ * MIT/X Consortium License
+ */
+
+/*
+ * U+25XX codepoints data
+ *
+ * References:
+ *   http://www.unicode.org/charts/PDF/U2500.pdf
+ *   http://www.unicode.org/charts/PDF/U2580.pdf
+ *
+ * Test page:
+ *   https://github.com/GNOME/vte/blob/master/doc/boxes.txt
+ */
+
+/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */
+/* Categories (mutually exclusive except BDB): */
+/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */
+#define BDL (1<<8)   /* Box Draw Lines (light/double/heavy) */
+#define BDA (1<<9)   /* Box Draw Arc (light) */
+
+#define BBD (1<<10)  /* Box Block Down (lower) X/8 */
+#define BBL (2<<10)  /* Box Block Left X/8 */
+#define BBU (3<<10)  /* Box Block Upper X/8 */
+#define BBR (4<<10)  /* Box Block Right X/8 */
+#define BBQ (5<<10)  /* Box Block Quadrants */
+#define BRL (6<<10)  /* Box Braille (data is lower byte of U28XX) */
+
+#define BBS (1<<14)  /* Box Block Shades */
+#define BDB (1<<15)  /* Box Draw is Bold */
+
+/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical      */
+/* Heavy is light+double (literally drawing light+double align to form heavy) */
+#define LL (1<<0)
+#define LU (1<<1)
+#define LR (1<<2)
+#define LD (1<<3)
+#define LH (LL+LR)
+#define LV (LU+LD)
+
+#define DL (1<<4)
+#define DU (1<<5)
+#define DR (1<<6)
+#define DD (1<<7)
+#define DH (DL+DR)
+#define DV (DU+DD)
+
+#define HL (LL+DL)
+#define HU (LU+DU)
+#define HR (LR+DR)
+#define HD (LD+DD)
+#define HH (HL+HR)
+#define HV (HU+HD)
+
+/* (BBQ) Quadrants Top/Bottom x Left/Right */
+#define TL (1<<0)
+#define TR (1<<1)
+#define BL (1<<2)
+#define BR (1<<3)
+
+/* Data for U+2500 - U+259F except dashes/diagonals */
+static const unsigned short boxdata[256] = {
+	/* light lines */
+	[0x00] = BDL + LH,       /* light horizontal */
+	[0x02] = BDL + LV,       /* light vertical */
+	[0x0c] = BDL + LD + LR,  /* light down and right */
+	[0x10] = BDL + LD + LL,  /* light down and left */
+	[0x14] = BDL + LU + LR,  /* light up and right */
+	[0x18] = BDL + LU + LL,  /* light up and left */
+	[0x1c] = BDL + LV + LR,  /* light vertical and right */
+	[0x24] = BDL + LV + LL,  /* light vertical and left */
+	[0x2c] = BDL + LH + LD,  /* light horizontal and down */
+	[0x34] = BDL + LH + LU,  /* light horizontal and up */
+	[0x3c] = BDL + LV + LH,  /* light vertical and horizontal */
+	[0x74] = BDL + LL,       /* light left */
+	[0x75] = BDL + LU,       /* light up */
+	[0x76] = BDL + LR,       /* light right */
+	[0x77] = BDL + LD,       /* light down */
+
+	/* heavy [+light] lines */
+	[0x01] = BDL + HH,
+	[0x03] = BDL + HV,
+	[0x0d] = BDL + HR + LD,
+	[0x0e] = BDL + HD + LR,
+	[0x0f] = BDL + HD + HR,
+	[0x11] = BDL + HL + LD,
+	[0x12] = BDL + HD + LL,
+	[0x13] = BDL + HD + HL,
+	[0x15] = BDL + HR + LU,
+	[0x16] = BDL + HU + LR,
+	[0x17] = BDL + HU + HR,
+	[0x19] = BDL + HL + LU,
+	[0x1a] = BDL + HU + LL,
+	[0x1b] = BDL + HU + HL,
+	[0x1d] = BDL + HR + LV,
+	[0x1e] = BDL + HU + LD + LR,
+	[0x1f] = BDL + HD + LR + LU,
+	[0x20] = BDL + HV + LR,
+	[0x21] = BDL + HU + HR + LD,
+	[0x22] = BDL + HD + HR + LU,
+	[0x23] = BDL + HV + HR,
+	[0x25] = BDL + HL + LV,
+	[0x26] = BDL + HU + LD + LL,
+	[0x27] = BDL + HD + LU + LL,
+	[0x28] = BDL + HV + LL,
+	[0x29] = BDL + HU + HL + LD,
+	[0x2a] = BDL + HD + HL + LU,
+	[0x2b] = BDL + HV + HL,
+	[0x2d] = BDL + HL + LD + LR,
+	[0x2e] = BDL + HR + LL + LD,
+	[0x2f] = BDL + HH + LD,
+	[0x30] = BDL + HD + LH,
+	[0x31] = BDL + HD + HL + LR,
+	[0x32] = BDL + HR + HD + LL,
+	[0x33] = BDL + HH + HD,
+	[0x35] = BDL + HL + LU + LR,
+	[0x36] = BDL + HR + LU + LL,
+	[0x37] = BDL + HH + LU,
+	[0x38] = BDL + HU + LH,
+	[0x39] = BDL + HU + HL + LR,
+	[0x3a] = BDL + HU + HR + LL,
+	[0x3b] = BDL + HH + HU,
+	[0x3d] = BDL + HL + LV + LR,
+	[0x3e] = BDL + HR + LV + LL,
+	[0x3f] = BDL + HH + LV,
+	[0x40] = BDL + HU + LH + LD,
+	[0x41] = BDL + HD + LH + LU,
+	[0x42] = BDL + HV + LH,
+	[0x43] = BDL + HU + HL + LD + LR,
+	[0x44] = BDL + HU + HR + LD + LL,
+	[0x45] = BDL + HD + HL + LU + LR,
+	[0x46] = BDL + HD + HR + LU + LL,
+	[0x47] = BDL + HH + HU + LD,
+	[0x48] = BDL + HH + HD + LU,
+	[0x49] = BDL + HV + HL + LR,
+	[0x4a] = BDL + HV + HR + LL,
+	[0x4b] = BDL + HV + HH,
+	[0x78] = BDL + HL,
+	[0x79] = BDL + HU,
+	[0x7a] = BDL + HR,
+	[0x7b] = BDL + HD,
+	[0x7c] = BDL + HR + LL,
+	[0x7d] = BDL + HD + LU,
+	[0x7e] = BDL + HL + LR,
+	[0x7f] = BDL + HU + LD,
+
+	/* double [+light] lines */
+	[0x50] = BDL + DH,
+	[0x51] = BDL + DV,
+	[0x52] = BDL + DR + LD,
+	[0x53] = BDL + DD + LR,
+	[0x54] = BDL + DR + DD,
+	[0x55] = BDL + DL + LD,
+	[0x56] = BDL + DD + LL,
+	[0x57] = BDL + DL + DD,
+	[0x58] = BDL + DR + LU,
+	[0x59] = BDL + DU + LR,
+	[0x5a] = BDL + DU + DR,
+	[0x5b] = BDL + DL + LU,
+	[0x5c] = BDL + DU + LL,
+	[0x5d] = BDL + DL + DU,
+	[0x5e] = BDL + DR + LV,
+	[0x5f] = BDL + DV + LR,
+	[0x60] = BDL + DV + DR,
+	[0x61] = BDL + DL + LV,
+	[0x62] = BDL + DV + LL,
+	[0x63] = BDL + DV + DL,
+	[0x64] = BDL + DH + LD,
+	[0x65] = BDL + DD + LH,
+	[0x66] = BDL + DD + DH,
+	[0x67] = BDL + DH + LU,
+	[0x68] = BDL + DU + LH,
+	[0x69] = BDL + DH + DU,
+	[0x6a] = BDL + DH + LV,
+	[0x6b] = BDL + DV + LH,
+	[0x6c] = BDL + DH + DV,
+
+	/* (light) arcs */
+	[0x6d] = BDA + LD + LR,
+	[0x6e] = BDA + LD + LL,
+	[0x6f] = BDA + LU + LL,
+	[0x70] = BDA + LU + LR,
+
+	/* Lower (Down) X/8 block (data is 8 - X) */
+	[0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4,
+	[0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0,
+
+	/* Left X/8 block (data is X) */
+	[0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4,
+	[0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1,
+
+	/* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */
+	[0x80] = BBU + 4, [0x94] = BBU + 1,
+	[0x90] = BBR + 4, [0x95] = BBR + 7,
+
+	/* Quadrants */
+	[0x96] = BBQ + BL,
+	[0x97] = BBQ + BR,
+	[0x98] = BBQ + TL,
+	[0x99] = BBQ + TL + BL + BR,
+	[0x9a] = BBQ + TL + BR,
+	[0x9b] = BBQ + TL + TR + BL,
+	[0x9c] = BBQ + TL + TR + BR,
+	[0x9d] = BBQ + TR,
+	[0x9e] = BBQ + BL + TR,
+	[0x9f] = BBQ + BL + TR + BR,
+
+	/* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */
+	[0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3,
+
+	/* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */
+	/* U+2571 - U+2573: unsupported (diagonals) */
+};

config.h

@@ -5,7 +5,8 @@
  *
  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
  */
-static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
+static char *font = "mono:pixelsize=16:antialias=true:autohint=true";
+static char *font2[] = { "NotoColorEmoji:pixelsize=16:antialias=true:autohint=true" };
 static int borderpx = 2;
 
 /*
@@ -67,6 +68,18 @@ static unsigned int blinktimeout = 800;
  */
 static unsigned int cursorthickness = 2;
 
+/*
+ * 1: render most of the lines/blocks characters without using the font for
+ *    perfect alignment between cells (U2500 - U259F except dashes/diagonals).
+ *    Bold affects lines thickness if boxdraw_bold is not 0. Italic is ignored.
+ * 0: disable (render all U25XX glyphs normally from the font).
+ */
+const int boxdraw = 1;
+const int boxdraw_bold = 0;
+
+/* braille (U28XX):  1: render as adjacent "pixels",  0: use font */
+const int boxdraw_braille = 0;
+
 /*
  * bell volume. It must be a value between -100 and 100. Use 0 for disabling
  * it
@@ -93,35 +106,35 @@ char *termname = "st-256color";
  */
 unsigned int tabspaces = 8;
 
+/* bg opacity */
+float alpha = 0.8;
+float alphaOffset = 0.0;
+float alphaUnfocus;
+
 /* Terminal colors (16 first used in escape sequence) */
 static const char *colorname[] = {
-	/* 8 normal colors */
-	"black",
-	"red3",
-	"green3",
-	"yellow3",
-	"blue2",
-	"magenta3",
-	"cyan3",
-	"gray90",
-
-	/* 8 bright colors */
-	"gray50",
-	"red",
-	"green",
-	"yellow",
-	"#5c5cff",
-	"magenta",
-	"cyan",
-	"white",
-
+	"#282828", /* hard contrast: #1d2021 / soft contrast: #32302f */
+	"#cc241d",
+	"#98971a",
+	"#d79921",
+	"#458588",
+	"#b16286",
+	"#689d6a",
+	"#a89984",
+	"#928374",
+	"#fb4934",
+	"#b8bb26",
+	"#fabd2f",
+	"#83a598",
+	"#d3869b",
+	"#8ec07c",
+	"#ebdbb2",
 	[255] = 0,
-
 	/* more colors can be added after 255 to use with DefaultXX */
-	"#cccccc",
-	"#555555",
-	"gray90", /* default foreground colour */
-	"black", /* default background colour */
+	"#add8e6", /* 256 -> cursor */
+	"#555555", /* 257 -> rev cursor*/
+	"#282828", /* 258 -> bg */
+	"#ebdbb2", /* 259 -> fg */
 };
 
 
@@ -129,10 +142,11 @@ static const char *colorname[] = {
  * Default colors (colorname index)
  * foreground, background, cursor, reverse cursor
  */
-unsigned int defaultfg = 258;
-unsigned int defaultbg = 259;
+unsigned int defaultfg = 259;
+unsigned int defaultbg = 258;
 unsigned int defaultcs = 256;
-static unsigned int defaultrcs = 257;
+unsigned int defaultrcs = 257;
+unsigned int background = 258;
 
 /*
  * Default shape of cursor
@@ -170,12 +184,53 @@ static unsigned int defaultattr = 11;
  */
 static uint forcemousemod = ShiftMask;
 
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+		{ "font",         STRING,  &font },
+		{ "fontalt0",     STRING,  &font2[0] },
+		{ "color0",       STRING,  &colorname[0] },
+		{ "color1",       STRING,  &colorname[1] },
+		{ "color2",       STRING,  &colorname[2] },
+		{ "color3",       STRING,  &colorname[3] },
+		{ "color4",       STRING,  &colorname[4] },
+		{ "color5",       STRING,  &colorname[5] },
+		{ "color6",       STRING,  &colorname[6] },
+		{ "color7",       STRING,  &colorname[7] },
+		{ "color8",       STRING,  &colorname[8] },
+		{ "color9",       STRING,  &colorname[9] },
+		{ "color10",      STRING,  &colorname[10] },
+		{ "color11",      STRING,  &colorname[11] },
+		{ "color12",      STRING,  &colorname[12] },
+		{ "color13",      STRING,  &colorname[13] },
+		{ "color14",      STRING,  &colorname[14] },
+		{ "color15",      STRING,  &colorname[15] },
+		{ "background",   STRING,  &colorname[258] },
+		{ "foreground",   STRING,  &colorname[259] },
+		{ "cursorColor",  STRING,  &colorname[256] },
+		{ "termname",     STRING,  &termname },
+		{ "shell",        STRING,  &shell },
+		{ "minlatency",   INTEGER, &minlatency },
+		{ "maxlatency",   INTEGER, &maxlatency },
+		{ "blinktimeout", INTEGER, &blinktimeout },
+		{ "bellvolume",   INTEGER, &bellvolume },
+		{ "tabspaces",    INTEGER, &tabspaces },
+		{ "borderpx",     INTEGER, &borderpx },
+		{ "cwscale",      FLOAT,   &cwscale },
+		{ "chscale",      FLOAT,   &chscale },
+		{ "alpha",        FLOAT,   &alpha },
+		{ "alphaOffset",  FLOAT,   &alphaOffset },
+};
+
 /*
  * Internal mouse shortcuts.
  * Beware that overloading Button1 will disable the selection.
  */
 static MouseShortcut mshortcuts[] = {
 	/* mask                 button   function        argument       release */
+	{ XK_NO_MOD,            Button4, kscrollup,      {.i = 1} },
+	{ XK_NO_MOD,            Button5, kscrolldown,    {.i = 1} },
 	{ XK_ANY_MOD,           Button2, selpaste,       {.i = 0},      1 },
 	{ ShiftMask,            Button4, ttysend,        {.s = "\033[5;2~"} },
 	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"} },
@@ -185,7 +240,11 @@ static MouseShortcut mshortcuts[] = {
 
 /* Internal keyboard shortcuts. */
 #define MODKEY Mod1Mask
-#define TERMMOD (ControlMask|ShiftMask)
+#define TERMMOD (Mod1Mask|ShiftMask)
+
+static char *openurlcmd[] = { "/bin/sh", "-c", "st-urlhandler -o", "externalpipe", NULL };
+static char *copyurlcmd[] = { "/bin/sh", "-c", "st-urlhandler -c", "externalpipe", NULL };
+static char *copyoutput[] = { "/bin/sh", "-c", "st-copyout", "externalpipe", NULL };
 
 static Shortcut shortcuts[] = {
 	/* mask                 keysym          function        argument */
@@ -198,9 +257,32 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_Home,        zoomreset,      {.f =  0} },
 	{ TERMMOD,              XK_C,           clipcopy,       {.i =  0} },
 	{ TERMMOD,              XK_V,           clippaste,      {.i =  0} },
-	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
+	{ MODKEY,               XK_c,           clipcopy,       {.i =  0} },
+	{ ShiftMask,            XK_Insert,      clippaste,      {.i =  0} },
+	{ MODKEY,               XK_v,           clippaste,      {.i =  0} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
+	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
+	{ ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
+	{ MODKEY,               XK_Page_Up,     kscrollup,      {.i = -1} },
+	{ MODKEY,               XK_Page_Down,   kscrolldown,    {.i = -1} },
+	{ MODKEY,               XK_k,           kscrollup,      {.i =  1} },
+	{ MODKEY,               XK_j,           kscrolldown,    {.i =  1} },
+	{ MODKEY,               XK_Up,          kscrollup,      {.i =  1} },
+	{ MODKEY,               XK_Down,        kscrolldown,    {.i =  1} },
+	{ MODKEY,               XK_u,           kscrollup,      {.i = -1} },
+	{ MODKEY,               XK_d,           kscrolldown,    {.i = -1} },
+	{ MODKEY,		XK_s,		changealpha,	{.f = -0.05} },
+	{ MODKEY,		XK_a,		changealpha,	{.f = +0.05} },
+	{ TERMMOD,              XK_Up,          zoom,           {.f = +1} },
+	{ TERMMOD,              XK_Down,        zoom,           {.f = -1} },
+	{ TERMMOD,              XK_K,           zoom,           {.f = +1} },
+	{ TERMMOD,              XK_J,           zoom,           {.f = -1} },
+	{ TERMMOD,              XK_U,           zoom,           {.f = +2} },
+	{ TERMMOD,              XK_D,           zoom,           {.f = -2} },
+	{ MODKEY,               XK_l,           externalpipe,   {.v = openurlcmd } },
+	{ MODKEY,               XK_y,           externalpipe,   {.v = copyurlcmd } },
+	{ MODKEY,               XK_o,           externalpipe,   {.v = copyoutput } },
 };
 
 /*
@@ -472,3 +554,4 @@ static char ascii_printable[] =
 	" !\"#$%&'()*+,-./0123456789:;<=>?"
 	"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
 	"`abcdefghijklmnopqrstuvwxyz{|}~";
+

config.mk

@@ -15,10 +15,12 @@ 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 \
+       `$(PKG_CONFIG) --cflags freetype2` \
+       `$(PKG_CONFIG) --cflags harfbuzz`
+LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft -lXrender\
        `$(PKG_CONFIG) --libs fontconfig` \
-       `$(PKG_CONFIG) --libs freetype2`
+       `$(PKG_CONFIG) --libs freetype2` \
+       `$(PKG_CONFIG) --libs harfbuzz`
 
 # flags
 STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
@@ -30,7 +32,6 @@ STLDFLAGS = $(LIBS) $(LDFLAGS)
 #LIBS = -L$(X11LIB) -lm -lX11 -lutil -lXft \
 #       `$(PKG_CONFIG) --libs fontconfig` \
 #       `$(PKG_CONFIG) --libs freetype2`
-#MANPREFIX = ${PREFIX}/man
 
 # compiler and linker
 # CC = c99

hb.c

@@ -0,0 +1,154 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <X11/Xft/Xft.h>
+#include <X11/cursorfont.h>
+#include <hb.h>
+#include <hb-ft.h>
+
+#include "st.h"
+
+#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, .start = HB_FEATURE_GLOBAL_START, .end = HB_FEATURE_GLOBAL_END }
+
+/*
+ * Replace 0 with a list of font features, wrapped in FEATURE macro, e.g.
+ * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
+ * 
+ * Uncomment either one of the 2 lines below. Uncomment the prior to disable (any) font features. Uncomment the 
+ * latter to enable the (selected) font features.
+ */
+
+hb_feature_t features[] = { 0 };
+//hb_feature_t features[] = { FEATURE('s','s','0','1'), FEATURE('s','s','0','2'), FEATURE('s','s','0','3'), FEATURE('s','s','0','5'), FEATURE('s','s','0','6'), FEATURE('s','s','0','7'), FEATURE('s','s','0','8'), FEATURE('z','e','r','o') };
+
+void hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length);
+hb_font_t *hbfindfont(XftFont *match);
+
+typedef struct {
+	XftFont *match;
+	hb_font_t *font;
+} HbFontMatch;
+
+static int hbfontslen = 0;
+static HbFontMatch *hbfontcache = NULL;
+
+void
+hbunloadfonts()
+{
+	for (int i = 0; i < hbfontslen; i++) {
+		hb_font_destroy(hbfontcache[i].font);
+		XftUnlockFace(hbfontcache[i].match);
+	}
+
+	if (hbfontcache != NULL) {
+		free(hbfontcache);
+		hbfontcache = NULL;
+	}
+	hbfontslen = 0;
+}
+
+hb_font_t *
+hbfindfont(XftFont *match)
+{
+	for (int i = 0; i < hbfontslen; i++) {
+		if (hbfontcache[i].match == match)
+			return hbfontcache[i].font;
+	}
+
+	/* Font not found in cache, caching it now. */
+	hbfontcache = realloc(hbfontcache, sizeof(HbFontMatch) * (hbfontslen + 1));
+	FT_Face face = XftLockFace(match);
+	hb_font_t *font = hb_ft_font_create(face, NULL);
+	if (font == NULL)
+		die("Failed to load Harfbuzz font.");
+
+	hbfontcache[hbfontslen].match = match;
+	hbfontcache[hbfontslen].font = font;
+	hbfontslen += 1;
+
+	return font;
+}
+
+void
+hbtransform(XftGlyphFontSpec *specs, const Glyph *glyphs, size_t len, int x, int y)
+{
+	int start = 0, length = 1, gstart = 0;
+	hb_codepoint_t *codepoints = calloc((unsigned int)len, sizeof(hb_codepoint_t));
+
+	for (int idx = 1, specidx = 1; idx < len; idx++) {
+		if (glyphs[idx].mode & ATTR_WDUMMY) {
+			length += 1;
+			continue;
+		}
+
+		if (specs[specidx].font != specs[start].font || ATTRCMP(glyphs[gstart], glyphs[idx]) || selected(x + idx, y) != selected(x + gstart, y)) {
+			hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length);
+
+			/* Reset the sequence. */
+			length = 1;
+			start = specidx;
+			gstart = idx;
+		} else {
+			length += 1;
+		}
+
+		specidx++;
+	}
+
+	/* EOL. */
+	hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length);
+
+	/* Apply the transformation to glyph specs. */
+	for (int i = 0, specidx = 0; i < len; i++) {
+		if (glyphs[i].mode & ATTR_WDUMMY)
+			continue;
+		if (glyphs[i].mode & ATTR_BOXDRAW) {
+			specidx++;
+			continue;
+		}
+
+		if (codepoints[i] != specs[specidx].glyph)
+			((Glyph *)glyphs)[i].mode |= ATTR_LIGA;
+
+		specs[specidx++].glyph = codepoints[i];
+	}
+
+	free(codepoints);
+}
+
+void
+hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length)
+{
+	hb_font_t *font = hbfindfont(xfont);
+	if (font == NULL)
+		return;
+
+	Rune rune;
+	ushort mode = USHRT_MAX;
+	hb_buffer_t *buffer = hb_buffer_create();
+	hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
+
+	/* Fill buffer with codepoints. */
+	for (int i = start; i < (start+length); i++) {
+		rune = string[i].u;
+		mode = string[i].mode;
+		if (mode & ATTR_WDUMMY)
+			rune = 0x0020;
+		hb_buffer_add_codepoints(buffer, &rune, 1, 0, 1);
+	}
+
+	/* Shape the segment. */
+	hb_shape(font, buffer, features, sizeof(features));
+
+	/* Get new glyph info. */
+	hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, NULL);
+
+	/* Write new codepoints. */
+	for (int i = 0; i < length; i++) {
+		hb_codepoint_t gid = info[i].codepoint;
+		codepoints[start+i] = gid;
+	}
+
+	/* Cleanup. */
+	hb_buffer_destroy(buffer);
+}

hb.h

@@ -0,0 +1,7 @@
+#include <X11/Xft/Xft.h>
+#include <hb.h>
+#include <hb-ft.h>
+
+void hbunloadfonts();
+void hbtransform(XftGlyphFontSpec *, const Glyph *, size_t, int, int);
+

st-copyout

@@ -0,0 +1,13 @@
+#!/bin/sh
+# Using external pipe with st, give a dmenu prompt of recent commands,
+# allowing the user to copy the output of one.
+# xclip required for this script.
+# By Jaywalker and Luke
+tmpfile=$(mktemp /tmp/st-cmd-output.XXXXXX)
+trap 'rm "$tmpfile"' 0 1 15
+sed -n "w $tmpfile"
+sed -i 's/\x0//g' "$tmpfile"
+ps1="$(grep "\S" "$tmpfile" | tail -n 1 | sed 's/^\s*//' | cut -d' ' -f1)"
+chosen="$(grep -F "$ps1" "$tmpfile" | sed '$ d' | tac | dmenu -p "Copy which command's output?" -i -l 10 | sed 's/[^^]/[&]/g; s/\^/\\^/g')"
+eps1="$(echo "$ps1" | sed 's/[^^]/[&]/g; s/\^/\\^/g')"
+awk "/^$chosen$/{p=1;print;next} p&&/$eps1/{p=0};p" "$tmpfile" | xclip -selection clipboard

st-urlhandler

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+urlregex="(((http|https|gopher|gemini|ftp|ftps|git)://|www\\.)[a-zA-Z0-9.]*[:;a-zA-Z0-9./+@$&%?$\#=_~-]*)|((magnet:\\?xt=urn:btih:)[a-zA-Z0-9]*)"
+
+urls="$(sed 's/.*│//g' | tr -d '\n' | # First remove linebreaks and mutt sidebars:
+	grep -aEo "$urlregex" | # grep only urls as defined above.
+	uniq | # Ignore neighboring duplicates.
+	sed "s/\(\.\|,\|;\|\!\\|\?\)$//;
+	s/^www./http:\/\/www\./")" # xdg-open will not detect url without http
+
+[ -z "$urls" ] && exit 1
+
+while getopts "hoc" o; do case "${o}" in
+	h) printf "Optional arguments for custom use:\\n  -c: copy\\n  -o: xdg-open\\n  -h: Show this message\\n" && exit 1 ;;
+	o) chosen="$(echo "$urls" | dmenu -i -p 'Follow which url?' -l 10)"
+	setsid xdg-open "$chosen" >/dev/null 2>&1 & ;;
+	c) echo "$urls" | dmenu -i -p 'Copy which url?' -l 10 | tr -d '\n' | xclip -selection clipboard ;;
+	*) printf "Invalid option: -%s\\n" "$OPTARG" && exit 1 ;;
+esac done

st.1

@@ -125,6 +125,41 @@ and all the remaining arguments are used as a command
 even without it.
 .SH SHORTCUTS
 .TP
+.B Alt-j/k or Alt-Up/Down or Alt-Mouse Wheel
+Scroll up/down one line at a time.
+.TP
+.B Alt-u/d or Alt-Page Up/Page Down
+Scroll up/down one screen at a time.
+.TP
+.B Alt-Shift-k/j or Alt-Shift-Page Up/Page Down or Alt-Shift-Mouse Wheel
+Increase or decrease font size.
+.TP
+.B Alt-Home
+Reset to default font size.
+.TP
+.B Shift-Insert or Alt-v
+Paste from clipboard.
+.TP
+.B Alt-c
+Copy to clipboard.
+.TP
+.B Alt-p
+Paste/input primary selection.
+.TP
+.B Alt-l
+Show dmenu menu of all URLs on screen and choose one to open.
+.TP
+.B Alt-y
+Show dmenu menu of all URLs on screen and choose one to copy.
+.TP
+.B Alt-o
+Show dmenu menu of all recently run commands and copy the output of the chosen command to the clipboard.
+.I xclip
+required.
+.TP
+.B Alt-a/s
+Increase or decrease opacity/alpha value (make window more or less transparent).
+.TP
 .B Break
 Send a break in the serial line.
 Break key is obtained in PC keyboards
@@ -141,24 +176,6 @@ Print the full screen to the
 .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
@@ -174,4 +191,3 @@ See the LICENSE file for the terms of redistribution.
 .BR scroll (1)
 .SH BUGS
 See the TODO file in the distribution.
-

st.c

@@ -35,6 +35,7 @@
 #define ESC_ARG_SIZ   16
 #define STR_BUF_SIZ   ESC_BUF_SIZ
 #define STR_ARG_SIZ   ESC_ARG_SIZ
+#define HISTSIZE      2000
 
 /* macros */
 #define IS_SET(flag)		((term.mode & (flag)) != 0)
@@ -42,6 +43,10 @@
 #define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
 #define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
 #define ISDELIM(u)		(u && wcschr(worddelimiters, u))
+#define TLINE(y)		((y) < term.scr ? term.hist[((y) + term.histi - \
+				term.scr + HISTSIZE + 1) % HISTSIZE] : \
+				term.line[(y) - term.scr])
+#define TLINE_HIST(y)           ((y) <= HISTSIZE-term.row+2 ? term.hist[(y)] : term.line[(y-HISTSIZE+term.row-3)])
 
 enum term_mode {
 	MODE_WRAP        = 1 << 0,
@@ -113,8 +118,12 @@ typedef struct {
 typedef struct {
 	int row;      /* nb row */
 	int col;      /* nb col */
+	int maxcol;
 	Line *line;   /* screen */
 	Line *alt;    /* alternate screen */
+	Line hist[HISTSIZE]; /* history buffer */
+	int histi;    /* history index */
+	int scr;      /* scroll back */
 	int *dirty;   /* dirtyness of lines */
 	TCursor c;    /* cursor */
 	int ocx;      /* old cursor col */
@@ -185,8 +194,8 @@ static void tnewline(int);
 static void tputtab(int);
 static void tputc(Rune);
 static void treset(void);
-static void tscrollup(int, int);
-static void tscrolldown(int, int);
+static void tscrollup(int, int, int);
+static void tscrolldown(int, int, int);
 static void tsetattr(const int *, int);
 static void tsetchar(Rune, const Glyph *, int, int);
 static void tsetdirt(int, int);
@@ -194,7 +203,6 @@ static void tsetscroll(int, int);
 static void tswapscreen(void);
 static void tsetmode(int, int, const int *, int);
 static int twrite(const char *, int, int);
-static void tfulldirt(void);
 static void tcontrolcode(uchar );
 static void tdectest(char );
 static void tdefutf8(char);
@@ -272,6 +280,8 @@ xrealloc(void *p, size_t len)
 char *
 xstrdup(const char *s)
 {
+	if ((s = strdup(s)) == NULL)
+		die("strdup: %s\n", strerror(errno));
 	char *p;
 
 	if ((p = strdup(s)) == NULL)
@@ -409,10 +419,24 @@ tlinelen(int y)
 {
 	int i = term.col;
 
-	if (term.line[y][i - 1].mode & ATTR_WRAP)
+	if (TLINE(y)[i - 1].mode & ATTR_WRAP)
 		return i;
 
-	while (i > 0 && term.line[y][i - 1].u == ' ')
+	while (i > 0 && TLINE(y)[i - 1].u == ' ')
+		--i;
+
+	return i;
+}
+
+int
+tlinehistlen(int y)
+{
+	int i = term.col;
+
+	if (TLINE_HIST(y)[i - 1].mode & ATTR_WRAP)
+		return i;
+
+	while (i > 0 && TLINE_HIST(y)[i - 1].u == ' ')
 		--i;
 
 	return i;
@@ -464,6 +488,7 @@ selextend(int col, int row, int type, int done)
 	sel.mode = done ? SEL_IDLE : SEL_READY;
 }
 
+
 void
 selnormalize(void)
 {
@@ -521,7 +546,7 @@ selsnap(int *x, int *y, int direction)
 		 * Snap around if the word wraps around at the end or
 		 * beginning of a line.
 		 */
-		prevgp = &term.line[*y][*x];
+		prevgp = &TLINE(*y)[*x];
 		prevdelim = ISDELIM(prevgp->u);
 		for (;;) {
 			newx = *x + direction;
@@ -536,14 +561,14 @@ selsnap(int *x, int *y, int direction)
 					yt = *y, xt = *x;
 				else
 					yt = newy, xt = newx;
-				if (!(term.line[yt][xt].mode & ATTR_WRAP))
+				if (!(TLINE(yt)[xt].mode & ATTR_WRAP))
 					break;
 			}
 
 			if (newx >= tlinelen(newy))
 				break;
 
-			gp = &term.line[newy][newx];
+			gp = &TLINE(newy)[newx];
 			delim = ISDELIM(gp->u);
 			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 					|| (delim && gp->u != prevgp->u)))
@@ -564,14 +589,14 @@ selsnap(int *x, int *y, int direction)
 		*x = (direction < 0) ? 0 : term.col - 1;
 		if (direction < 0) {
 			for (; *y > 0; *y += direction) {
-				if (!(term.line[*y-1][term.col-1].mode
+				if (!(TLINE(*y-1)[term.col-1].mode
 						& ATTR_WRAP)) {
 					break;
 				}
 			}
 		} else if (direction > 0) {
 			for (; *y < term.row-1; *y += direction) {
-				if (!(term.line[*y][term.col-1].mode
+				if (!(TLINE(*y)[term.col-1].mode
 						& ATTR_WRAP)) {
 					break;
 				}
@@ -602,13 +627,13 @@ getsel(void)
 		}
 
 		if (sel.type == SEL_RECTANGULAR) {
-			gp = &term.line[y][sel.nb.x];
+			gp = &TLINE(y)[sel.nb.x];
 			lastx = sel.ne.x;
 		} else {
-			gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+			gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0];
 			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 		}
-		last = &term.line[y][MIN(lastx, linelen-1)];
+		last = &TLINE(y)[MIN(lastx, linelen-1)];
 		while (last >= gp && last->u == ' ')
 			--last;
 
@@ -844,6 +869,9 @@ void
 ttywrite(const char *s, size_t n, int may_echo)
 {
 	const char *next;
+	Arg arg = (Arg) { .i = term.scr };
+
+	kscrolldown(&arg);
 
 	if (may_echo && IS_SET(MODE_ECHO))
 		twrite(s, n, 1);
@@ -939,7 +967,7 @@ ttyresize(int tw, int th)
 }
 
 void
-ttyhangup()
+ttyhangup(void)
 {
 	/* Send SIGHUP to shell */
 	kill(pid, SIGHUP);
@@ -1055,13 +1083,53 @@ tswapscreen(void)
 }
 
 void
-tscrolldown(int orig, int n)
+kscrolldown(const Arg* a)
+{
+	int n = a->i;
+
+	if (n < 0)
+		n = term.row + n;
+
+	if (n > term.scr)
+		n = term.scr;
+
+	if (term.scr > 0) {
+		term.scr -= n;
+		selscroll(0, -n);
+		tfulldirt();
+	}
+}
+
+void
+kscrollup(const Arg* a)
+{
+	int n = a->i;
+
+	if (n < 0)
+		n = term.row + n;
+
+	if (term.scr <= HISTSIZE-n) {
+		term.scr += n;
+		selscroll(0, n);
+		tfulldirt();
+	}
+}
+
+void
+tscrolldown(int orig, int n, int copyhist)
 {
 	int i;
 	Line temp;
 
 	LIMIT(n, 0, term.bot-orig+1);
 
+	if (copyhist) {
+		term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
+		temp = term.hist[term.histi];
+		term.hist[term.histi] = term.line[term.bot];
+		term.line[term.bot] = temp;
+	}
+
 	tsetdirt(orig, term.bot-n);
 	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
 
@@ -1071,17 +1139,28 @@ tscrolldown(int orig, int n)
 		term.line[i-n] = temp;
 	}
 
-	selscroll(orig, n);
+	if (term.scr == 0)
+		selscroll(orig, n);
 }
 
 void
-tscrollup(int orig, int n)
+tscrollup(int orig, int n, int copyhist)
 {
 	int i;
 	Line temp;
 
 	LIMIT(n, 0, term.bot-orig+1);
 
+	if (copyhist) {
+		term.histi = (term.histi + 1) % HISTSIZE;
+		temp = term.hist[term.histi];
+		term.hist[term.histi] = term.line[orig];
+		term.line[orig] = temp;
+	}
+
+	if (term.scr > 0 && term.scr < HISTSIZE)
+		term.scr = MIN(term.scr + n, HISTSIZE-1);
+
 	tclearregion(0, orig, term.col-1, orig+n-1);
 	tsetdirt(orig+n, term.bot);
 
@@ -1091,7 +1170,8 @@ tscrollup(int orig, int n)
 		term.line[i+n] = temp;
 	}
 
-	selscroll(orig, -n);
+	if (term.scr == 0)
+		selscroll(orig, -n);
 }
 
 void
@@ -1120,7 +1200,7 @@ tnewline(int first_col)
 	int y = term.c.y;
 
 	if (y == term.bot) {
-		tscrollup(term.top, 1);
+		tscrollup(term.top, 1, 1);
 	} else {
 		y++;
 	}
@@ -1215,6 +1295,9 @@ tsetchar(Rune u, const Glyph *attr, int x, int y)
 	term.dirty[y] = 1;
 	term.line[y][x] = *attr;
 	term.line[y][x].u = u;
+
+	if (isboxdraw(u))
+		term.line[y][x].mode |= ATTR_BOXDRAW;
 }
 
 void
@@ -1228,8 +1311,8 @@ tclearregion(int x1, int y1, int x2, int y2)
 	if (y1 > y2)
 		temp = y1, y1 = y2, y2 = temp;
 
-	LIMIT(x1, 0, term.col-1);
-	LIMIT(x2, 0, term.col-1);
+	LIMIT(x1, 0, term.maxcol-1);
+	LIMIT(x2, 0, term.maxcol-1);
 	LIMIT(y1, 0, term.row-1);
 	LIMIT(y2, 0, term.row-1);
 
@@ -1285,14 +1368,14 @@ void
 tinsertblankline(int n)
 {
 	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrolldown(term.c.y, n);
+		tscrolldown(term.c.y, n, 0);
 }
 
 void
 tdeleteline(int n)
 {
 	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrollup(term.c.y, n);
+		tscrollup(term.c.y, n, 0);
 }
 
 int32_t
@@ -1729,11 +1812,11 @@ csihandle(void)
 		break;
 	case 'S': /* SU -- Scroll <n> line up */
 		DEFAULT(csiescseq.arg[0], 1);
-		tscrollup(term.top, csiescseq.arg[0]);
+		tscrollup(term.top, csiescseq.arg[0], 0);
 		break;
 	case 'T': /* SD -- Scroll <n> line down */
 		DEFAULT(csiescseq.arg[0], 1);
-		tscrolldown(term.top, csiescseq.arg[0]);
+		tscrolldown(term.top, csiescseq.arg[0], 0);
 		break;
 	case 'L': /* IL -- Insert <n> blank lines */
 		DEFAULT(csiescseq.arg[0], 1);
@@ -1981,6 +2064,61 @@ strparse(void)
 	}
 }
 
+void
+externalpipe(const Arg *arg)
+{
+	int to[2];
+	char buf[UTF_SIZ];
+	void (*oldsigpipe)(int);
+	Glyph *bp, *end;
+	int lastpos, n, newline;
+
+	if (pipe(to) == -1)
+		return;
+
+	switch (fork()) {
+	case -1:
+		close(to[0]);
+		close(to[1]);
+		return;
+	case 0:
+		dup2(to[0], STDIN_FILENO);
+		close(to[0]);
+		close(to[1]);
+		execvp(((char **)arg->v)[0], (char **)arg->v);
+		fprintf(stderr, "st: execvp %s\n", ((char **)arg->v)[0]);
+		perror("failed");
+		exit(0);
+	}
+
+	close(to[0]);
+	/* ignore sigpipe for now, in case child exists early */
+	oldsigpipe = signal(SIGPIPE, SIG_IGN);
+	newline = 0;
+	for (n = 0; n <= HISTSIZE + 2; n++) {
+		bp = TLINE_HIST(n);
+		lastpos = MIN(tlinehistlen(n) + 1, term.col) - 1;
+		if (lastpos < 0)
+			break;
+        if (lastpos == 0)
+            continue;
+		end = &bp[lastpos + 1];
+		for (; bp < end; ++bp)
+			if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0)
+				break;
+		if ((newline = TLINE_HIST(n)[lastpos].mode & ATTR_WRAP))
+			continue;
+		if (xwrite(to[1], "\n", 1) < 0)
+			break;
+		newline = 0;
+	}
+	if (newline)
+		(void)xwrite(to[1], "\n", 1);
+	close(to[1]);
+	/* restore */
+	signal(SIGPIPE, oldsigpipe);
+}
+
 void
 strdump(void)
 {
@@ -2296,7 +2434,7 @@ eschandle(uchar ascii)
 		return 0;
 	case 'D': /* IND -- Linefeed */
 		if (term.c.y == term.bot) {
-			tscrollup(term.top, 1);
+			tscrollup(term.top, 1, 1);
 		} else {
 			tmoveto(term.c.x, term.c.y+1);
 		}
@@ -2309,7 +2447,7 @@ eschandle(uchar ascii)
 		break;
 	case 'M': /* RI -- Reverse index */
 		if (term.c.y == term.top) {
-			tscrolldown(term.top, 1);
+			tscrolldown(term.top, 1, 1);
 		} else {
 			tmoveto(term.c.x, term.c.y-1);
 		}
@@ -2523,12 +2661,19 @@ twrite(const char *buf, int buflen, int show_ctrl)
 void
 tresize(int col, int row)
 {
-	int i;
-	int minrow = MIN(row, term.row);
-	int mincol = MIN(col, term.col);
+	int i, j;
+	int tmp;
+	int minrow, mincol;
 	int *bp;
 	TCursor c;
 
+	tmp = col;
+	if (!term.maxcol)
+		term.maxcol = term.col;
+	col = MAX(col, term.maxcol);
+	minrow = MIN(row, term.row);
+	mincol = MIN(col, term.maxcol);
+
 	if (col < 1 || row < 1) {
 		fprintf(stderr,
 		        "tresize: error resizing to %dx%d\n", col, row);
@@ -2560,6 +2705,14 @@ tresize(int col, int row)
 	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
 	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
 
+	for (i = 0; i < HISTSIZE; i++) {
+		term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph));
+		for (j = mincol; j < col; j++) {
+			term.hist[i][j] = term.c.attr;
+			term.hist[i][j].u = ' ';
+		}
+	}
+
 	/* resize each row to new width, zero-pad if needed */
 	for (i = 0; i < minrow; i++) {
 		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
@@ -2571,17 +2724,18 @@ tresize(int col, int row)
 		term.line[i] = xmalloc(col * sizeof(Glyph));
 		term.alt[i] = xmalloc(col * sizeof(Glyph));
 	}
-	if (col > term.col) {
-		bp = term.tabs + term.col;
+	if (col > term.maxcol) {
+		bp = term.tabs + term.maxcol;
 
-		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+		memset(bp, 0, sizeof(*term.tabs) * (col - term.maxcol));
 		while (--bp > term.tabs && !*bp)
 			/* nothing */ ;
 		for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
 			*bp = 1;
 	}
 	/* update terminal size */
-	term.col = col;
+	term.col = tmp;
+	term.maxcol = col;
 	term.row = row;
 	/* reset scrolling region */
 	tsetscroll(0, row-1);
@@ -2618,7 +2772,7 @@ 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);
 	}
 }
 
@@ -2639,8 +2793,13 @@ draw(void)
 		cx--;
 
 	drawregion(0, 0, term.col, term.row);
-	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+	if (term.scr == 0)
+		xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+				term.ocx, term.ocy, term.line[term.ocy][term.ocx],
+				term.line[term.ocy], term.col);
+	/* xdrawcursor(cx, term.c.y, term.line[term.c.y][cx], */
+	/* 		term.ocx, term.ocy, term.line[term.ocy][term.ocx], */
+	/* 		term.line[term.ocy], term.col); */
 	term.ocx = cx;
 	term.ocy = term.c.y;
 	xfinishdraw();
@@ -2654,3 +2813,4 @@ redraw(void)
 	tfulldirt();
 	draw();
 }
+

st.h

@@ -11,7 +11,8 @@
 #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 || \
+#define ATTRCMP(a, b)		(((a).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) != ((b).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) || \
+				(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)
@@ -33,6 +34,8 @@ enum glyph_attribute {
 	ATTR_WRAP       = 1 << 8,
 	ATTR_WIDE       = 1 << 9,
 	ATTR_WDUMMY     = 1 << 10,
+	ATTR_BOXDRAW    = 1 << 11,
+	ATTR_LIGA       = 1 << 12,
 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
 };
 
@@ -79,8 +82,13 @@ typedef union {
 
 void die(const char *, ...);
 void redraw(void);
+void tfulldirt(void);
 void draw(void);
 
+void externalpipe(const Arg *);
+void kscrolldown(const Arg *);
+void kscrollup(const Arg *);
+
 void printscreen(const Arg *);
 void printsel(const Arg *);
 void sendbreak(const Arg *);
@@ -111,6 +119,14 @@ void *xmalloc(size_t);
 void *xrealloc(void *, size_t);
 char *xstrdup(const char *);
 
+int isboxdraw(Rune);
+ushort boxdrawindex(const Glyph *);
+#ifdef XFT_VERSION
+/* only exposed to x.c, otherwise we'll need Xft.h for the types */
+void boxdraw_xinit(Display *, Colormap, XftDraw *, Visual *);
+void drawboxes(int, int, int, int, XftColor *, XftColor *, const XftGlyphFontSpec *, int);
+#endif
+
 /* config.h globals */
 extern char *utmp;
 extern char *scroll;
@@ -123,4 +139,8 @@ extern char *termname;
 extern unsigned int tabspaces;
 extern unsigned int defaultfg;
 extern unsigned int defaultbg;
+extern float alpha;
+extern float alphaUnfocus;
+extern const int boxdraw, boxdraw_bold, boxdraw_braille;
 extern unsigned int defaultcs;
+

win.h

@@ -25,7 +25,7 @@ enum win_mode {
 
 void xbell(void);
 void xclipcopy(void);
-void xdrawcursor(int, int, Glyph, int, int, Glyph);
+void xdrawcursor(int, int, Glyph, int, int, Glyph, Line, int);
 void xdrawline(Line, int, int, int);
 void xfinishdraw(void);
 void xloadcols(void);
@@ -39,3 +39,4 @@ void xsetpointermotion(int);
 void xsetsel(char *);
 int xstartdraw(void);
 void xximspot(int, int);
+

x.c

@@ -14,11 +14,13 @@
 #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"
+#include "hb.h"
 
 /* types used in config.h */
 typedef struct {
@@ -45,6 +47,19 @@ typedef struct {
 	signed char appcursor; /* application cursor */
 } Key;
 
+/* Xresources preferences */
+enum resource_type {
+	STRING = 0,
+	INTEGER = 1,
+	FLOAT = 2
+};
+
+typedef struct {
+	char *name;
+	enum resource_type type;
+	void *dst;
+} ResourcePref;
+
 /* X modifiers */
 #define XK_ANY_MOD    UINT_MAX
 #define XK_NO_MOD     0
@@ -55,6 +70,7 @@ static void clipcopy(const Arg *);
 static void clippaste(const Arg *);
 static void numlock(const Arg *);
 static void selpaste(const Arg *);
+static void changealpha(const Arg *);
 static void zoom(const Arg *);
 static void zoomabs(const Arg *);
 static void zoomreset(const Arg *);
@@ -105,6 +121,7 @@ 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;
@@ -156,6 +173,8 @@ static void xresize(int, int);
 static void xhints(void);
 static int xloadcolor(int, const char *, Color *);
 static int xloadfont(Font *, FcPattern *);
+static int xloadsparefont(FcPattern *, int);
+static void xloadsparefonts(void);
 static void xloadfonts(const char *, double);
 static void xunloadfont(Font *);
 static void xunloadfonts(void);
@@ -163,6 +182,7 @@ static void xsetenv(void);
 static void xseturgency(int);
 static int evcol(XEvent *);
 static int evrow(XEvent *);
+static float clamp(float, float, float);
 
 static void expose(XEvent *);
 static void visibility(XEvent *);
@@ -243,6 +263,7 @@ 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 +273,9 @@ 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 */
 static uint buttons; /* bit field of pressed buttons */
 
 void
@@ -292,6 +316,18 @@ numlock(const Arg *dummy)
 	win.mode ^= MODE_NUMLOCK;
 }
 
+void
+changealpha(const Arg *arg)
+{
+    if((alpha > 0 && arg->f < 0) || (alpha < 1 && arg->f > 0))
+        alpha += arg->f;
+    alpha = clamp(alpha, 0.0, 1.0);
+    alphaUnfocus = clamp(alpha-alphaOffset, 0.0, 1.0);
+
+    xloadcols();
+    redraw();
+}
+
 void
 zoom(const Arg *arg)
 {
@@ -306,6 +342,7 @@ zoomabs(const Arg *arg)
 {
 	xunloadfonts();
 	xloadfonts(usedfont, arg->f);
+	xloadsparefonts();
 	cresize(0, 0);
 	redraw();
 	xhints();
@@ -344,6 +381,15 @@ evrow(XEvent *e)
 	return y / win.ch;
 }
 
+float
+clamp(float value, float lower, float upper) {
+    if(value < lower)
+        return lower;
+    if(value > upper)
+        return upper;
+    return value;
+}
+
 void
 mousesel(XEvent *e, int done)
 {
@@ -364,68 +410,59 @@ mousesel(XEvent *e, int done)
 void
 mousereport(XEvent *e)
 {
-	int len, btn, code;
-	int x = evcol(e), y = evrow(e);
-	int state = e->xbutton.state;
+	int len, x = evcol(e), y = evrow(e),
+	    button = e->xbutton.button, state = e->xbutton.state;
 	char buf[40];
 	static int ox, oy;
 
-	if (e->type == MotionNotify) {
+	/* from urxvt */
+	if (e->xbutton.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)
+		/* MOUSE_MOTION: no reporting if no button is pressed */
+		if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
 			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;
+
+		button = oldbutton + 32;
+		ox = x;
+		oy = y;
 	} else {
-		btn = e->xbutton.button;
-		/* Only buttons 1 through 11 can be encoded */
-		if (btn < 1 || btn > 11)
-			return;
-		if (e->type == ButtonRelease) {
+		if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
+			button = 3;
+		} else {
+			button -= Button1;
+			if (button >= 3)
+				button += 64 - 3;
+		}
+		if (e->xbutton.type == ButtonPress) {
+			oldbutton = button;
+			ox = x;
+			oy = y;
+		} else if (e->xbutton.type == ButtonRelease) {
+			oldbutton = 3;
 			/* 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)
+			if (button == 64 || button == 65)
 				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);
+		button += ((state & ShiftMask  ) ? 4  : 0)
+			+ ((state & Mod4Mask   ) ? 8  : 0)
+			+ ((state & ControlMask) ? 16 : 0);
 	}
 
 	if (IS_SET(MODE_MOUSESGR)) {
 		len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
-				code, x+1, y+1,
+				button, 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);
+				32+button, 32+x+1, 32+y+1);
 	} else {
 		return;
 	}
@@ -752,7 +789,7 @@ 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);
 
@@ -790,6 +827,16 @@ 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 : alphaUnfocus;
+	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)
 {
@@ -797,21 +844,23 @@ xloadcols(void)
 	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);
+	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 (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(background, NULL, &dc.col[defaultbg]);
+
+	xloadalpha();
 	loaded = 1;
 }
 
@@ -859,8 +908,8 @@ xclear(int x1, int y1, int x2, int y2)
 void
 xhints(void)
 {
-	XClassHint class = {opt_name ? opt_name : termname,
-	                    opt_class ? opt_class : termname};
+	XClassHint class = {opt_name ? opt_name : "st",
+	                    opt_class ? opt_class : "St"};
 	XWMHints wm = {.flags = InputHint, .input = 1};
 	XSizeHints *sizeh;
 
@@ -1050,6 +1099,101 @@ xloadfonts(const 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)
 {
@@ -1062,6 +1206,9 @@ xunloadfont(Font *f)
 void
 xunloadfonts(void)
 {
+	/* Clear Harfbuzz font cache. */
+	hbunloadfonts();
+
 	/* Free the loaded fonts in the font cache.  */
 	while (frclen > 0)
 		XftFontClose(xw.dpy, frc[--frclen].font);
@@ -1134,11 +1281,21 @@ 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())
@@ -1147,8 +1304,11 @@ 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);
+	xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
 	xloadcols();
 
 	/* adjust fixed window geometry */
@@ -1168,19 +1328,15 @@ 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);
 
@@ -1237,6 +1393,8 @@ xinit(int cols, int rows)
 	xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
 	if (xsel.xtarget == None)
 		xsel.xtarget = XA_STRING;
+
+	boxdraw_xinit(xw.dpy, xw.cmap, xw.draw, xw.vis);
 }
 
 int
@@ -1261,7 +1419,7 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
 		mode = glyphs[i].mode;
 
 		/* Skip dummy wide-character spacing. */
-		if (mode == ATTR_WDUMMY)
+		if (mode & ATTR_WDUMMY)
 			continue;
 
 		/* Determine font for glyph if different from previous glyph. */
@@ -1283,8 +1441,13 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
 			yp = winy + font->ascent;
 		}
 
-		/* Lookup character index with default font. */
-		glyphidx = XftCharIndex(xw.dpy, font->match, rune);
+		if (mode & ATTR_BOXDRAW) {
+			/* minor shoehorning: boxdraw uses only this ushort */
+			glyphidx = boxdrawindex(&glyphs[i]);
+		} else {
+			/* Lookup character index with default font. */
+			glyphidx = XftCharIndex(xw.dpy, font->match, rune);
+		}
 		if (glyphidx) {
 			specs[numspecs].font = font->match;
 			specs[numspecs].glyph = glyphidx;
@@ -1368,6 +1531,9 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
 		numspecs++;
 	}
 
+	/* Harfbuzz transformation for ligatures. */
+	hbtransform(specs, glyphs, len, x, y);
+
 	return numspecs;
 }
 
@@ -1488,13 +1654,17 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
 	r.width = width;
 	XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
 
-	/* Render the glyphs. */
-	XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
+	if (base.mode & ATTR_BOXDRAW) {
+		drawboxes(winx, winy, width / len, win.ch, fg, bg, specs, len);
+	} else {
+		/* 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);
+		XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
+                width, 1);
 	}
 
 	if (base.mode & ATTR_STRUCK) {
@@ -1517,14 +1687,17 @@ xdrawglyph(Glyph g, int x, int y)
 }
 
 void
-xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og, Line line, int len)
 {
 	Color drawcol;
 
 	/* remove the old cursor */
 	if (selected(ox, oy))
 		og.mode ^= ATTR_REVERSE;
-	xdrawglyph(og, ox, oy);
+
+	/* Redraw the line where cursor was previously.
+	 * It will restore the ligatures broken by the cursor. */
+	xdrawline(line, 0, oy, len);
 
 	if (IS_SET(MODE_HIDE))
 		return;
@@ -1532,7 +1705,7 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 	/*
 	 * Select the right color for the right mode.
 	 */
-	g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
+	g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE|ATTR_BOXDRAW;
 
 	if (IS_SET(MODE_REVERSE)) {
 		g.mode |= ATTR_REVERSE;
@@ -1777,12 +1950,22 @@ 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();
+		}
 	}
 }
 
@@ -1834,8 +2017,10 @@ kpress(XEvent *ev)
 {
 	XKeyEvent *e = &ev->xkey;
 	KeySym ksym;
-	char buf[64], *customkey;
-	int len;
+	char *buf = NULL, *customkey;
+	int len = 0;
+	int buf_size = 64;
+	int critical = - 1;
 	Rune c;
 	Status status;
 	Shortcut *bp;
@@ -1843,27 +2028,44 @@ kpress(XEvent *ev)
 	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);
+reallocbuf:
+	if (critical > 0)
+		goto cleanup;
+	if (buf)
+		free(buf);
+
+	buf = xmalloc((buf_size) * sizeof(char));
+	critical += 1;
+
+	if (xw.ime.xic) {
+		len = XmbLookupString(xw.ime.xic, e, buf, buf_size, &ksym, &status);
+		if (status == XBufferOverflow) {
+			buf_size = len;
+			goto reallocbuf;
+		}
+	} else {
+		// Not sure how to fix this and if it is fixable
+		// but at least it does write something into the buffer
+		// so it is not as critical
+		len = XLookupString(e, buf, buf_size, &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;
+			goto cleanup;
 		}
 	}
 
 	/* 2. custom keys from config.h */
 	if ((customkey = kmap(ksym, e->state))) {
 		ttywrite(customkey, strlen(customkey), 1);
-		return;
+		goto cleanup;
 	}
 
 	/* 3. composed string from input method */
 	if (len == 0)
-		return;
+		goto cleanup;
 	if (len == 1 && e->state & Mod1Mask) {
 		if (IS_SET(MODE_8BIT)) {
 			if (*buf < 0177) {
@@ -1876,7 +2078,11 @@ kpress(XEvent *ev)
 			len = 2;
 		}
 	}
-	ttywrite(buf, len, 1);
+	if (len <= buf_size)
+		ttywrite(buf, len, 1);
+cleanup:
+	if (buf)
+		free(buf);
 }
 
 void
@@ -2011,6 +2217,59 @@ run(void)
 	}
 }
 
+int
+resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
+{
+	char **sdst = dst;
+	int *idst = dst;
+	float *fdst = dst;
+
+	char fullname[256];
+	char fullclass[256];
+	char *type;
+	XrmValue ret;
+
+	snprintf(fullname, sizeof(fullname), "%s.%s",
+			opt_name ? opt_name : "st", name);
+	snprintf(fullclass, sizeof(fullclass), "%s.%s",
+			opt_class ? opt_class : "St", name);
+	fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
+
+	XrmGetResource(db, fullname, fullclass, &type, &ret);
+	if (ret.addr == NULL || strncmp("String", type, 64))
+		return 1;
+
+	switch (rtype) {
+	case STRING:
+		*sdst = ret.addr;
+		break;
+	case INTEGER:
+		*idst = strtoul(ret.addr, NULL, 10);
+		break;
+	case FLOAT:
+		*fdst = strtof(ret.addr, NULL);
+		break;
+	}
+	return 0;
+}
+
+void
+config_init(void)
+{
+	char *resm;
+	XrmDatabase db;
+	ResourcePref *p;
+
+	XrmInitialize();
+	resm = XResourceManagerString(xw.dpy);
+	if (!resm)
+		return;
+
+	db = XrmGetStringDatabase(resm);
+	for (p = resources; p < resources + LEN(resources); p++)
+		resource_load(db, p->name, p->type, p->dst);
+}
+
 void
 usage(void)
 {
@@ -2035,6 +2294,9 @@ main(int argc, char *argv[])
 	case 'a':
 		allowaltscreen = 0;
 		break;
+	case 'A':
+		opt_alpha = EARGF(usage());
+		break;
 	case 'c':
 		opt_class = EARGF(usage());
 		break;
@@ -2084,8 +2346,15 @@ run:
 
 	setlocale(LC_CTYPE, "");
 	XSetLocaleModifiers("");
+
+	if(!(xw.dpy = XOpenDisplay(NULL)))
+		die("Can't open display\n");
+
+	config_init();
 	cols = MAX(cols, 1);
 	rows = MAX(rows, 1);
+	defaultbg = MAX(LEN(colorname), 256);
+	alphaUnfocus = alpha-alphaOffset;
 	tnew(cols, rows);
 	xinit(cols, rows);
 	xsetenv();
@@ -2094,3 +2363,4 @@ run:
 
 	return 0;
 }
+