replicate dwm behavior for snap resize

Enables the protocol documented at
https://wayland.app/protocols/ext-data-control-v1

It is the upstreamed version of the old wlr_data_control.

It is used e.g. by mpv to read and write the clipboard.

.mailmap

@@ -0,0 +1,3 @@
+Lennart Jablonka <humm@ljabl.com> <hummsmith42@gmail.com>
+Leonardo Hernández Hernández <leohdz172@proton.me> <leohdz172@outlook.com>
+Leonardo Hernández Hernández <leohdz172@proton.me> <leohdz172@protonmail.com>

CHANGELOG.md

@@ -1,19 +1,126 @@
 # Changelog
 
 * [Unreleased](#unreleased)
+* [0.7](#0.7)
+* [0.6](#0.6)
 * [0.5](#0.5)
 
 
 ## Unreleased
 ### Added
+
+* Support for the linux-drm-syncobj-v1 protocol ([wlroots!4715][wlroots!4715], [#685][685])
+* Allow the use of non-system wlroots library ([#646][646])
+
+[wlroots!4715]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4715
+[685]: https://codeberg.org/dwl/dwl/pulls/685
+[646]: https://codeberg.org/dwl/dwl/pulls/646
+
+
 ### Changed
 ### Deprecated
 ### Removed
 ### Fixed
+
+* Crash when a client is created while all outputs are disabled.
+
 ### Security
 ### Contributors
 
 
+## 0.7
+
+This version is just 0.6 with wlroots 0.18 compatibility.
+
+### Added
+
+* Add support for the alpha-modifier-v1 protocol ([wlroots!4616][wlroots!4616]).
+* dwl now will survive GPU resets ([#601][601]).
+
+[wlroots!4616]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4616
+[601]: https://codeberg.org/dwl/dwl/issues/601
+
+
+### Contributors
+
+Guido Cella
+
+
+## 0.6
+
+### Added
+
+* Add `rootcolor` to change the default background color ([#544][544]).
+* Implement the wlr-virtual-pointer-unstable-v1 protocol ([#574][574]).
+* Implement the pointer-constraints and relative-pointer protocols ([#317][317])
+* Implement the wlr-output-power-management protocol ([#599][599])
+
+[544]: https://codeberg.org/dwl/dwl/pulls/544
+[574]: https://codeberg.org/dwl/dwl/pulls/574
+[317]: https://codeberg.org/dwl/dwl/issues/317
+[599]: https://codeberg.org/dwl/dwl/issues/559
+
+
+### Changed
+
+* Keyboards are now managed through keyboard groups ([#549][549]).
+* Only the first matched keybinding is executed.
+* Allow toggling the layout before selecting a different one ([#570][570]).
+* Fullscreen clients are now rendered above wlr_layer_surfaces in the top layer
+  ([#609][609]).
+* The default menu was changed from `bemenu-run` to `wmenu-run` ([#553][553]).
+* The option `sloppyfocus` now replicates the dwm behavior ([#599][599]).
+* Allow configure position of monitors with negative values. (-1, -1) is
+  used to auto-configure them ([#635][635]).
+* dwl now kills the entire process group of `startup_cmd`
+* The O_NONBLOCK flag is set for stdout.
+
+[549]: https://codeberg.org/dwl/dwl/pulls/549
+[570]: https://codeberg.org/dwl/dwl/pulls/570
+[609]: https://codeberg.org/dwl/dwl/pulls/609
+[553]: https://codeberg.org/dwl/dwl/issues/553
+[599]: https://codeberg.org/dwl/dwl/pulls/599
+[635]: https://codeberg.org/dwl/dwl/pulls/635
+
+
+### Removed
+
+* The SLOC limit is now removed ([#497][497]).
+
+[497]: https://codeberg.org/dwl/dwl/pulls/497
+
+
+### Fixed
+
+* Clients not having the correct border color when mapping.
+* Compliance with the xdg-decoration-unstable-v1 ([#546][546]).
+* dwl no longer sends negative values in xdg_toplevel.configure events.
+* Crashes with disabled monitors ([#472][472]).
+
+[546]: https://codeberg.org/dwl/dwl/pulls/546
+[472]: https://codeberg.org/dwl/dwl/issues/472
+
+
+### Contributors
+
+Ben Jargowsky
+Benjamin Chausse
+David Donahue
+Devin J. Pohly
+Dima Krasner
+Emil Miler
+Forrest Bushstone
+Guido Cella
+Peter Hofmann
+Rutherther
+Squibid
+choc
+fictitiousexistence
+korei999
+sewn
+thanatos
+
+
 ## 0.5
 
 ### Added

Makefile

@@ -4,19 +4,24 @@
 include config.mk
 
 # flags for compiling
-DWLCPPFLAGS = -I. -DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XWAYLAND)
+DWLCPPFLAGS = -I. -DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L \
-DWLDEVCFLAGS = -g -pedantic -Wall -Wextra -Wdeclaration-after-statement -Wno-unused-parameter -Wshadow -Wunused-macros\
+	-DVERSION=\"$(VERSION)\" $(XWAYLAND)
-	-Werror=strict-prototypes -Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types -Wfloat-conversion
+DWLDEVCFLAGS = -g -Wpedantic -Wall -Wextra -Wdeclaration-after-statement \
+	-Wno-unused-parameter -Wshadow -Wunused-macros -Werror=strict-prototypes \
+	-Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types \
+	-Wfloat-conversion
 
 # CFLAGS / LDFLAGS
-PKGS      = wlroots wayland-server xkbcommon libinput $(XLIBS)
+PKGS      = wayland-server xkbcommon libinput $(XLIBS)
-DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
+DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(WLR_INCS) $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
-LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(LIBS)
+LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(WLR_LIBS) -lm $(LIBS)
 
 all: dwl
 dwl: dwl.o util.o
-	$(CC) dwl.o util.o $(LDLIBS) $(LDFLAGS) $(DWLCFLAGS) -o $@
+	$(CC) dwl.o util.o $(DWLCFLAGS) $(LDFLAGS) $(LDLIBS) -o $@
-dwl.o: dwl.c config.mk config.h client.h cursor-shape-v1-protocol.h pointer-constraints-unstable-v1-protocol.h wlr-layer-shell-unstable-v1-protocol.h xdg-shell-protocol.h
+dwl.o: dwl.c client.h config.h config.mk cursor-shape-v1-protocol.h \
+	pointer-constraints-unstable-v1-protocol.h wlr-layer-shell-unstable-v1-protocol.h \
+	wlr-output-power-management-unstable-v1-protocol.h xdg-shell-protocol.h
 util.o: util.c util.h
 
 # wayland-scanner is a tool which generates C headers and rigging for Wayland
@@ -26,14 +31,17 @@ WAYLAND_SCANNER   = `$(PKG_CONFIG) --variable=wayland_scanner wayland-scanner`
 WAYLAND_PROTOCOLS = `$(PKG_CONFIG) --variable=pkgdatadir wayland-protocols`
 
 cursor-shape-v1-protocol.h:
-	$(WAYLAND_SCANNER) server-header \
+	$(WAYLAND_SCANNER) enum-header \
 		$(WAYLAND_PROTOCOLS)/staging/cursor-shape/cursor-shape-v1.xml $@
 pointer-constraints-unstable-v1-protocol.h:
-	$(WAYLAND_SCANNER) server-header \
+	$(WAYLAND_SCANNER) enum-header \
 		$(WAYLAND_PROTOCOLS)/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml $@
 wlr-layer-shell-unstable-v1-protocol.h:
-	$(WAYLAND_SCANNER) server-header \
+	$(WAYLAND_SCANNER) enum-header \
 		protocols/wlr-layer-shell-unstable-v1.xml $@
+wlr-output-power-management-unstable-v1-protocol.h:
+	$(WAYLAND_SCANNER) server-header \
+		protocols/wlr-output-power-management-unstable-v1.xml $@
 xdg-shell-protocol.h:
 	$(WAYLAND_SCANNER) server-header \
 		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
@@ -45,14 +53,15 @@ clean:
 
 dist: clean
 	mkdir -p dwl-$(VERSION)
-	cp -R LICENSE* Makefile CHANGELOG.md README.md client.h config.def.h\
+	cp -R LICENSE* Makefile CHANGELOG.md README.md client.h config.def.h \
-		config.mk protocols dwl.1 dwl.c util.c util.h dwl.desktop\
+		config.mk protocols dwl.1 dwl.c util.c util.h dwl.desktop \
 		dwl-$(VERSION)
 	tar -caf dwl-$(VERSION).tar.gz dwl-$(VERSION)
 	rm -rf dwl-$(VERSION)
 
 install: dwl
 	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	rm -f $(DESTDIR)$(PREFIX)/bin/dwl
 	cp -f dwl $(DESTDIR)$(PREFIX)/bin
 	chmod 755 $(DESTDIR)$(PREFIX)/bin/dwl
 	mkdir -p $(DESTDIR)$(MANDIR)/man1
@@ -62,8 +71,9 @@ install: dwl
 	cp -f dwl.desktop $(DESTDIR)$(DATADIR)/wayland-sessions/dwl.desktop
 	chmod 644 $(DESTDIR)$(DATADIR)/wayland-sessions/dwl.desktop
 uninstall:
-	rm -f $(DESTDIR)$(PREFIX)/bin/dwl $(DESTDIR)$(MANDIR)/man1/dwl.1 $(DESTDIR)$(DATADIR)/wayland-sessions/dwl.desktop
+	rm -f $(DESTDIR)$(PREFIX)/bin/dwl $(DESTDIR)$(MANDIR)/man1/dwl.1 \
+		$(DESTDIR)$(DATADIR)/wayland-sessions/dwl.desktop
 
 .SUFFIXES: .c .o
 .c.o:
-	$(CC) $(CPPFLAGS) $(DWLCFLAGS) -c $<
+	$(CC) $(CPPFLAGS) $(DWLCFLAGS) -o $@ -c $<

README.md

@@ -1,108 +1,82 @@
 # dwl - dwm for Wayland
 
 Join us on our IRC channel: [#dwl on Libera Chat]  
-Or on our [Discord server].
+Or on the community-maintained [Discord server].
 
 dwl is a compact, hackable compositor for [Wayland] based on [wlroots]. It is
-intended to fill the same space in the Wayland world that dwm does in X11,
+intended to fill the same space in the Wayland world that [dwm] does in X11,
-primarily in terms of functionality, and secondarily in terms of philosophy.
+primarily in terms of functionality, and secondarily in terms of
-Like dwm, dwl is:
+philosophy. Like [dwm], dwl is:
 
 - Easy to understand, hack on, and extend with patches
 - One C source file (or a very small number) configurable via `config.h`
 - Tied to as few external dependencies as possible
 
-dwl is not meant to provide every feature under the sun. Instead, like dwm, it
+## Getting Started:
-sticks to features which are necessary, simple, and straightforward to implement
-given the base on which it is built. Implemented default features are:
 
-- Any features provided by dwm/Xlib: simple window borders, tags, keybindings,
+### Latest semi-stable [release]
-  client rules, mouse move/resize. Providing a built-in status bar is an
+This is probably where you want to start. This builds against the [wlroots]
-  exception to this goal, to avoid dependencies on font rendering and/or
+versions currently shipping in major distributions. If your
-  drawing libraries when an external bar could work well.
+distribution's `wlroots` version is older, use an earlier dwl [release].
-- Configurable multi-monitor layout support, including position and rotation
+The `wlroots` version against which a given `dwl` release builds is specified
-- Configurable HiDPI/multi-DPI support
+with each release on the [release] page
-- Idle-inhibit protocol which lets applications such as mpv disable idle
-  monitoring
-- Provide information to external status bars via stdout/stdin
-- Urgency hints via xdg-activate protocol
-- Support screen lockers via ext-session-lock-v1 protocol
-- Various Wayland protocols
-- XWayland support as provided by wlroots (can be enabled in `config.mk`)
-- Zero flickering - Wayland users naturally expect that "every frame is perfect"
-- Layer shell popups (used by Waybar)
-- Damage tracking provided by scenegraph API
 
-Given the Wayland architecture, dwl has to implement features from dwm **and**
+### Development branch [main]
-the xorg-server. Because of this, it is impossible to maintain the original
+Active development progresses on the `main` branch. The `main` branch is built
-project goal of 2000 SLOC and have a reasonably complete compositor with
+against a late (and often changing) git commit of wlroots. While the adventurous
-features comparable to dwm. However, this does not mean that the code will grow
+are welcome to use `main`, it is a rocky road. Using `main` requires that the
-indiscriminately. We will try to keep the code as small as possible.
+user be willing to chase git commits of wlroots. Testing development pull
-
+requests may involve merging unmerged pull requests in [wlroots]' git repository
-Features under consideration (possibly as patches) are:
+and/or git commits of wayland.
-
-- Protocols made trivial by wlroots
-- Implement the text-input and input-method protocols to support IME once ibus
-  implements input-method v2 (see https://github.com/ibus/ibus/pull/2256 and
-  https://codeberg.org/dwl/dwl/pulls/235)
-
-Feature *non-goals* for the main codebase include:
-
-- Client-side decoration (any more than is necessary to tell the clients not to)
-- Client-initiated window management, such as move, resize, and close, which can
-  be done through the compositor
-- Animations and visual effects
-
-## Building dwl
   
+### Building dwl
 dwl has the following dependencies:
-```
+- libinput
-libinput
+- wayland
-wayland
+- wlroots (compiled with the libinput backend)
-wlroots (compiled with the libinput backend)
+- xkbcommon
-xkbcommon
+- wayland-protocols (compile-time only)
-wayland-protocols (compile-time only)
+- pkg-config (compile-time only)
-pkg-config (compile-time only)
-```
-If you enable X11 support:
-```
-libxcb
-libxcb-wm
-wlroots (compiled with X11 support)
-Xwayland (runtime only)
-```
 
-Simply install these (and their `-devel` versions if your distro has separate
+dwl has the following additional dependencies if XWayland support is enabled:
-development packages) and run `make`.  If you wish to build against a Git
+- libxcb
-version of wlroots, check out the [wlroots-next branch].
+- libxcb-wm
+- wlroots (compiled with X11 support)
+- Xwayland (runtime only)
+
+Install these (and their `-devel` versions if your distro has separate
+development packages) and run `make`. If you wish to build against a released
+version of wlroots (*you probably do*), use a [release] or a [0.x branch]. If
+you want to use the unstable development `main` branch, you need to use the git
+version of [wlroots].
 
 To enable XWayland, you should uncomment its flags in `config.mk`.
 
 ## Configuration
 
 All configuration is done by editing `config.h` and recompiling, in the same
-manner as dwm. There is no way to separately restart the window manager in
+manner as [dwm]. There is no way to separately restart the window manager in
 Wayland without restarting the entire display server, so any changes will take
 effect the next time dwl is executed.
 
-As in the dwm community, we encourage users to share patches they have created.
+As in the [dwm] community, we encourage users to share patches they have
-Check out the dwl [patches repository] and [patches wiki]!
+created. Check out the [dwl-patches] repository!
 
 ## Running dwl
 
 dwl can be run on any of the backends supported by wlroots. This means you can
-run it as a separate window inside either an X11 or Wayland session, as well
+run it as a separate window inside either an X11 or Wayland session, as well as
-as directly from a VT console. Depending on your distro's setup, you may need
+directly from a VT console. Depending on your distro's setup, you may need to
-to add your user to the `video` and `input` groups before you can run dwl on
+add your user to the `video` and `input` groups before you can run dwl on a
-a VT. If you are using `elogind` or `systemd-logind` you need to install
+VT. If you are using `elogind` or `systemd-logind` you need to install polkit;
-polkit; otherwise you need to add yourself in the `seat` group and
+otherwise you need to add yourself in the `seat` group and enable/start the
-enable/start the seatd daemon.
+seatd daemon.
 
 When dwl is run with no arguments, it will launch the server and begin handling
 any shortcuts configured in `config.h`. There is no status bar or other
-decoration initially; these are instead clients that can be run within
+decoration initially; these are instead clients that can be run within the
-the Wayland session.
+Wayland session. Do note that the default background color is grey. This can be
-Do note that the background color is black.
+modified in `config.h`.
 
 If you would like to run a script or command automatically at startup, you can
 specify the command using the `-s` option. This command will be executed as a
@@ -110,7 +84,8 @@ shell command using `/bin/sh -c`.  It serves a similar function to `.xinitrc`,
 but differs in that the display server will not shut down when this process
 terminates. Instead, dwl will send this process a SIGTERM at shutdown and wait
 for it to terminate (if it hasn't already). This makes it ideal for execing into
-a user service manager like [s6], [anopa], [runit], [dinit], or [`systemd --user`].
+a user service manager like [s6], [anopa], [runit], [dinit], or [`systemd
+--user`].
 
 Note: The `-s` command is run as a *child process* of dwl, which means that it
 does not have the ability to affect the environment of dwl or of any processes
@@ -128,11 +103,11 @@ automatically, you will need to configure it prior to launching `dwl`, e.g.:
 
 Information about selected layouts, current window title, app-id, and
 selected/occupied/urgent tags is written to the stdin of the `-s` command (see
-the `printstatus()` function for details).  This information can be used to
+the `STATUS INFORMATION` section in `_dwl_(1)`).  This information can be used to
-populate an external status bar with a script that parses the information.
+populate an external status bar with a script that parses the
-Failing to read this information will cause dwl to block, so if you do want to
+information. Failing to read this information will cause dwl to block, so if you
-run a startup command that does not consume the status information, you can
+do want to run a startup command that does not consume the status information,
-close standard input with the `<&-` shell redirection, for example:
+you can close standard input with the `<&-` shell redirection, for example:
 
     dwl -s 'foot --server <&-'
 
@@ -143,10 +118,62 @@ script with the line
 
 To get a list of status bars that work with dwl consult our [wiki].
 
+### (Known) Java nonreparenting WM issue
+Certain IDEs don't display correctly unless an environmental variable for Java AWT
+indicates that the WM is nonreparenting.
+
+For some Java AWT-based IDEs, such as Xilinx Vivado and Microchip MPLAB X, the
+following environment variable needs to be set before running the IDE or dwl:
+
+    export _JAVA_AWT_WM_NONREPARENTING=1
+
 ## Replacements for X applications
 
 You can find a [list of useful resources on our wiki].
 
+## Background
+
+dwl is not meant to provide every feature under the sun. Instead, like [dwm], it
+sticks to features which are necessary, simple, and straightforward to implement
+given the base on which it is built. Implemented default features are:
+
+- Any features provided by [dwm]/Xlib: simple window borders, tags, keybindings,
+  client rules, mouse move/resize. Providing a built-in status bar is an
+  exception to this goal, to avoid dependencies on font rendering and/or drawing
+  libraries when an external bar could work well.
+- Configurable multi-monitor layout support, including position and rotation
+- Configurable HiDPI/multi-DPI support
+- Idle-inhibit protocol which lets applications such as mpv disable idle
+  monitoring
+- Provide information to external status bars via stdout/stdin
+- Urgency hints via xdg-activate protocol
+- Support screen lockers via ext-session-lock-v1 protocol
+- Various Wayland protocols
+- XWayland support as provided by wlroots (can be enabled in `config.mk`)
+- Zero flickering - Wayland users naturally expect that "every frame is perfect"
+- Layer shell popups (used by Waybar)
+- Damage tracking provided by scenegraph API
+
+Given the Wayland architecture, dwl has to implement features from [dwm] **and**
+the xorg-server. Because of this, it is impossible to maintain the original
+project goal of 2000 SLOC and have a reasonably complete compositor with
+features comparable to [dwm]. However, this does not mean that the code will grow
+indiscriminately. We will try to keep the code as small as possible.
+
+Features under consideration (possibly as patches) are:
+
+- Protocols made trivial by wlroots
+- Implement the text-input and input-method protocols to support IME once ibus
+  implements input-method v2 (see https://github.com/ibus/ibus/pull/2256 and
+  https://codeberg.org/dwl/dwl/pulls/235)
+
+Feature *non-goals* for the main codebase include:
+
+- Client-side decoration (any more than is necessary to tell the clients not to)
+- Client-initiated window management, such as move, resize, and close, which can
+  be done through the compositor
+- Animations and visual effects
+
 ## Acknowledgements
 
 dwl began by extending the TinyWL example provided (CC0) by the sway/wlroots
@@ -154,7 +181,7 @@ developers. This was made possible in many cases by looking at how sway
 accomplished something, then trying to do the same in as suckless a way as
 possible.
 
-Many thanks to suckless.org and the dwm developers and community for the
+Many thanks to suckless.org and the [dwm] developers and community for the
 inspiration, and to the various contributors to the project, including:
 
 - **Devin J. Pohly for creating and nurturing the fledgling project**
@@ -164,18 +191,21 @@ inspiration, and to the various contributors to the project, including:
 - Stivvo for output management and fullscreen support, and patch maintenance
 
 
-[Discord server]: https://discord.gg/jJxZnrGPWN
+[wlroots]: https://gitlab.freedesktop.org/wlroots
-[#dwl on Libera Chat]: https://web.libera.chat/?channels=#dwl
+[dwm]: https://dwm.suckless.org/
-[Wayland]: https://wayland.freedesktop.org/
-[wlroots]: https://gitlab.freedesktop.org/wlroots/wlroots/
-[wlroots-next branch]: https://codeberg.org/dwl/dwl/src/branch/wlroots-next
-[patches repository]: https://codeberg.org/dwl/dwl-patches
-[patches wiki]: https://codeberg.org/dwl/dwl-patches/wiki
-[s6]: https://skarnet.org/software/s6/
-[anopa]: https://jjacky.com/anopa/
-[runit]: http://smarden.org/runit/faq.html#userservices
-[dinit]: https://davmac.org/projects/dinit/
 [`systemd --user`]: https://wiki.archlinux.org/title/Systemd/User
+[#dwl on Libera Chat]: https://web.libera.chat/?channels=#dwl
+[0.7-rc1]: https://codeberg.org/dwl/dwl/releases/tag/v0.7-rc1
+[0.x branch]: https://codeberg.org/dwl/dwl/branches
+[anopa]: https://jjacky.com/anopa/
+[dinit]: https://davmac.org/projects/dinit/
+[dwl-patches]: https://codeberg.org/dwl/dwl-patches
+[list of useful resources on our wiki]: https://codeberg.org/dwl/dwl/wiki/Home#migrating-from-x
+[main]: https://codeberg.org/dwl/dwl/src/branch/main
+[release]: https://codeberg.org/dwl/dwl/releases
+[runit]: http://smarden.org/runit/faq.html#userservices
+[s6]: https://skarnet.org/software/s6/
+[wlroots]: https://gitlab.freedesktop.org/wlroots/wlroots/
 [wiki]: https://codeberg.org/dwl/dwl/wiki/Home#compatible-status-bars
-[list of useful resources on our wiki]:
+[Discord server]: https://discord.gg/jJxZnrGPWN
-    https://codeberg.org/dwl/dwl/wiki/Home#migrating-from-x
+[Wayland]: https://wayland.freedesktop.org/

client.h

@@ -126,15 +126,14 @@ client_get_appid(Client *c)
 {
 #ifdef XWAYLAND
 	if (client_is_x11(c))
-		return c->surface.xwayland->class;
+		return c->surface.xwayland->class ? c->surface.xwayland->class : "broken";
 #endif
-	return c->surface.xdg->toplevel->app_id;
+	return c->surface.xdg->toplevel->app_id ? c->surface.xdg->toplevel->app_id : "broken";
 }
 
 static inline void
 client_get_clip(Client *c, struct wlr_box *clip)
 {
-	struct wlr_box xdg_geom = {0};
 	*clip = (struct wlr_box){
 		.x = 0,
 		.y = 0,
@@ -147,9 +146,8 @@ client_get_clip(Client *c, struct wlr_box *clip)
 		return;
 #endif
 
-	wlr_xdg_surface_get_geometry(c->surface.xdg, &xdg_geom);
+	clip->x = c->surface.xdg->geometry.x;
-	clip->x = xdg_geom.x;
+	clip->y = c->surface.xdg->geometry.y;
-	clip->y = xdg_geom.y;
 }
 
 static inline void
@@ -164,7 +162,7 @@ client_get_geometry(Client *c, struct wlr_box *geom)
 		return;
 	}
 #endif
-	wlr_xdg_surface_get_geometry(c->surface.xdg, geom);
+	*geom = c->surface.xdg->geometry;
 }
 
 static inline Client *
@@ -172,11 +170,11 @@ client_get_parent(Client *c)
 {
 	Client *p = NULL;
 #ifdef XWAYLAND
-    if (client_is_x11(c)) {
+	if (client_is_x11(c)) {
-        if (c->surface.xwayland->parent)
+		if (c->surface.xwayland->parent)
-            toplevel_from_wlr_surface(c->surface.xwayland->parent->surface, &p, NULL);
+			toplevel_from_wlr_surface(c->surface.xwayland->parent->surface, &p, NULL);
-        return p;
+		return p;
-    }
+	}
 #endif
 	if (c->surface.xdg->toplevel->parent)
 		toplevel_from_wlr_surface(c->surface.xdg->toplevel->parent->base->surface, &p, NULL);
@@ -187,12 +185,12 @@ static inline int
 client_has_children(Client *c)
 {
 #ifdef XWAYLAND
-    if (client_is_x11(c))
+	if (client_is_x11(c))
-        return !wl_list_empty(&c->surface.xwayland->children);
+		return !wl_list_empty(&c->surface.xwayland->children);
 #endif
-    /* surface.xdg->link is never empty because it always contains at least the
+	/* surface.xdg->link is never empty because it always contains at least the
-     * surface itself. */
+	 * surface itself. */
-    return wl_list_length(&c->surface.xdg->link) > 1;
+	return wl_list_length(&c->surface.xdg->link) > 1;
 }
 
 static inline const char *
@@ -200,9 +198,9 @@ client_get_title(Client *c)
 {
 #ifdef XWAYLAND
 	if (client_is_x11(c))
-		return c->surface.xwayland->title;
+		return c->surface.xwayland->title ? c->surface.xwayland->title : "broken";
 #endif
-	return c->surface.xdg->toplevel->title;
+	return c->surface.xdg->toplevel->title ? c->surface.xdg->toplevel->title : "broken";
 }
 
 static inline int
@@ -215,16 +213,15 @@ client_is_float_type(Client *c)
 	if (client_is_x11(c)) {
 		struct wlr_xwayland_surface *surface = c->surface.xwayland;
 		xcb_size_hints_t *size_hints = surface->size_hints;
-		size_t i;
 		if (surface->modal)
 			return 1;
 
-		for (i = 0; i < surface->window_type_len; i++)
+		if (wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_DIALOG)
-			if (surface->window_type[i] == netatom[NetWMWindowTypeDialog]
+				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_SPLASH)
-					|| surface->window_type[i] == netatom[NetWMWindowTypeSplash]
+				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_TOOLBAR)
-					|| surface->window_type[i] == netatom[NetWMWindowTypeToolbar]
+				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_UTILITY)) {
-					|| surface->window_type[i] == netatom[NetWMWindowTypeUtility])
+			return 1;
-				return 1;
+		}
 
 		return size_hints && size_hints->min_width > 0 && size_hints->min_height > 0
 			&& (size_hints->max_width == size_hints->min_width
@@ -267,8 +264,8 @@ client_is_stopped(Client *c)
 
 	wl_client_get_credentials(c->surface.xdg->client->client, &pid, NULL, NULL);
 	if (waitid(P_PID, pid, &in, WNOHANG|WCONTINUED|WSTOPPED|WNOWAIT) < 0) {
-		/* This process is not our child process, while is very unluckely that
+		/* This process is not our child process, while is very unlikely that
-		 * it is stopped, in order to do not skip frames assume that it is. */
+		 * it is stopped, in order to do not skip frames, assume that it is. */
 		if (errno == ECHILD)
 			return 1;
 	} else if (in.si_pid) {
@@ -301,17 +298,6 @@ client_notify_enter(struct wlr_surface *s, struct wlr_keyboard *kb)
 		wlr_seat_keyboard_notify_enter(seat, s, NULL, 0, NULL);
 }
 
-static inline void
-client_restack_surface(Client *c)
-{
-#ifdef XWAYLAND
-	if (client_is_x11(c))
-		wlr_xwayland_surface_restack(c->surface.xwayland, NULL,
-				XCB_STACK_MODE_ABOVE);
-#endif
-	return;
-}
-
 static inline void
 client_send_close(Client *c)
 {
@@ -344,13 +330,20 @@ client_set_fullscreen(Client *c, int fullscreen)
 	wlr_xdg_toplevel_set_fullscreen(c->surface.xdg->toplevel, fullscreen);
 }
 
+static inline void
+client_set_scale(struct wlr_surface *s, float scale)
+{
+	wlr_fractional_scale_v1_notify_scale(s, scale);
+	wlr_surface_set_preferred_buffer_scale(s, (int32_t)ceilf(scale));
+}
+
 static inline uint32_t
 client_set_size(Client *c, uint32_t width, uint32_t height)
 {
 #ifdef XWAYLAND
 	if (client_is_x11(c)) {
 		wlr_xwayland_surface_configure(c->surface.xwayland,
-				c->geom.x, c->geom.y, width, height);
+				c->geom.x + c->bw, c->geom.y + c->bw, width, height);
 		return 0;
 	}
 #endif
@@ -364,8 +357,11 @@ static inline void
 client_set_tiled(Client *c, uint32_t edges)
 {
 #ifdef XWAYLAND
-	if (client_is_x11(c))
+	if (client_is_x11(c)) {
+		wlr_xwayland_surface_set_maximized(c->surface.xwayland,
+				edges != WLR_EDGE_NONE, edges != WLR_EDGE_NONE);
 		return;
+  }
 #endif
 	if (wl_resource_get_version(c->surface.xdg->toplevel->resource)
 			>= XDG_TOPLEVEL_STATE_TILED_RIGHT_SINCE_VERSION) {
@@ -391,8 +387,8 @@ client_wants_focus(Client *c)
 {
 #ifdef XWAYLAND
 	return client_is_unmanaged(c)
-		&& wlr_xwayland_or_surface_wants_focus(c->surface.xwayland)
+		&& wlr_xwayland_surface_override_redirect_wants_focus(c->surface.xwayland)
-		&& wlr_xwayland_icccm_input_model(c->surface.xwayland) != WLR_ICCCM_INPUT_MODEL_NONE;
+		&& wlr_xwayland_surface_icccm_input_model(c->surface.xwayland) != WLR_ICCCM_INPUT_MODEL_NONE;
 #endif
 	return 0;
 }

config.def.h

@@ -7,12 +7,13 @@
 static const int sloppyfocus               = 1;  /* focus follows mouse */
 static const int bypass_surface_visibility = 0;  /* 1 means idle inhibitors will disable idle tracking even if it's surface isn't visible  */
 static const unsigned int borderpx         = 1;  /* border pixel of windows */
+static const unsigned int snap             = 32; /* snap pixel */
 static const float rootcolor[]             = COLOR(0x222222ff);
 static const float bordercolor[]           = COLOR(0x444444ff);
 static const float focuscolor[]            = COLOR(0x005577ff);
 static const float urgentcolor[]           = COLOR(0xff0000ff);
 /* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
-static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
+static const float fullscreen_bg[]         = {0.0f, 0.0f, 0.0f, 1.0f}; /* You can also use glsl colors */
 
 /* tagging - TAGCOUNT must be no greater than 31 */
 #define TAGCOUNT (9)
@@ -22,9 +23,9 @@ static int log_level = WLR_ERROR;
 
 static const Rule rules[] = {
 	/* app_id             title       tags mask     isfloating   monitor */
-	/* examples: */
 	{ "Gimp_EXAMPLE",     NULL,       0,            1,           -1 }, /* Start on currently visible tags floating, not tiled */
 	{ "firefox_EXAMPLE",  NULL,       1 << 8,       0,           -1 }, /* Start on ONLY tag "9" */
+    /* default/example rule: can be changed but cannot be eliminated; at least one rule must exist */
 };
 
 /* layout(s) */
@@ -36,14 +37,15 @@ static const Layout layouts[] = {
 };
 
 /* monitors */
-/* NOTE: ALWAYS add a fallback rule, even if you are completely sure it won't be used */
+/* (x=-1, y=-1) is reserved as an "autoconfigure" monitor position indicator
+ * WARNING: negative values other than (-1, -1) cause problems with Xwayland clients due to
+ * https://gitlab.freedesktop.org/xorg/xserver/-/issues/899 */
 static const MonitorRule monrules[] = {
-	/* name       mfact  nmaster scale layout       rotate/reflect                x    y */
+   /* name        mfact  nmaster scale layout       rotate/reflect                x    y
-	/* example of a HiDPI laptop monitor:
+    * example of a HiDPI laptop monitor:
-	{ "eDP-1",    0.5f,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
+    { "eDP-1",    0.5f,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 }, */
-	*/
-	/* defaults */
 	{ NULL,       0.55f, 1,      1,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
+	/* default monitor rule: can be changed but cannot be eliminated; at least one monitor rule must exist */
 };
 
 /* keyboard */
@@ -115,44 +117,44 @@ static const enum libinput_config_tap_button_map button_map = LIBINPUT_CONFIG_TA
 
 /* commands */
 static const char *termcmd[] = { "foot", NULL };
-static const char *menucmd[] = { "bemenu-run", NULL };
+static const char *menucmd[] = { "wmenu-run", NULL };
 
 static const Key keys[] = {
-	/* Note that Shift changes certain key codes: c -> C, 2 -> at, etc. */
+	/* Note that Shift changes certain key codes: 2 -> at, etc. */
-	/* modifier                  key                 function        argument */
+	/* modifier                  key                  function          argument */
-	{ MODKEY,                    XKB_KEY_p,          spawn,          {.v = menucmd} },
+	{ MODKEY,                    XKB_KEY_p,           spawn,            {.v = menucmd} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Return,     spawn,          {.v = termcmd} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Return,      spawn,            {.v = termcmd} },
-	{ MODKEY,                    XKB_KEY_j,          focusstack,     {.i = +1} },
+	{ MODKEY,                    XKB_KEY_j,           focusstack,       {.i = +1} },
-	{ MODKEY,                    XKB_KEY_k,          focusstack,     {.i = -1} },
+	{ MODKEY,                    XKB_KEY_k,           focusstack,       {.i = -1} },
-	{ MODKEY,                    XKB_KEY_i,          incnmaster,     {.i = +1} },
+	{ MODKEY,                    XKB_KEY_i,           incnmaster,       {.i = +1} },
-	{ MODKEY,                    XKB_KEY_d,          incnmaster,     {.i = -1} },
+	{ MODKEY,                    XKB_KEY_d,           incnmaster,       {.i = -1} },
-	{ MODKEY,                    XKB_KEY_h,          setmfact,       {.f = -0.05f} },
+	{ MODKEY,                    XKB_KEY_h,           setmfact,         {.f = -0.05f} },
-	{ MODKEY,                    XKB_KEY_l,          setmfact,       {.f = +0.05f} },
+	{ MODKEY,                    XKB_KEY_l,           setmfact,         {.f = +0.05f} },
-	{ MODKEY,                    XKB_KEY_Return,     zoom,           {0} },
+	{ MODKEY,                    XKB_KEY_Return,      zoom,             {0} },
-	{ MODKEY,                    XKB_KEY_Tab,        view,           {0} },
+	{ MODKEY,                    XKB_KEY_Tab,         view,             {0} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_C,          killclient,     {0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_c,           killclient,       {0} },
-	{ MODKEY,                    XKB_KEY_t,          setlayout,      {.v = &layouts[0]} },
+	{ MODKEY,                    XKB_KEY_t,           setlayout,        {.v = &layouts[0]} },
-	{ MODKEY,                    XKB_KEY_f,          setlayout,      {.v = &layouts[1]} },
+	{ MODKEY,                    XKB_KEY_f,           setlayout,        {.v = &layouts[1]} },
-	{ MODKEY,                    XKB_KEY_m,          setlayout,      {.v = &layouts[2]} },
+	{ MODKEY,                    XKB_KEY_m,           setlayout,        {.v = &layouts[2]} },
-	{ MODKEY,                    XKB_KEY_space,      setlayout,      {0} },
+	{ MODKEY,                    XKB_KEY_space,       setlayout,        {0} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,      togglefloating, {0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_space,       togglefloating,   {0} },
-	{ MODKEY,                    XKB_KEY_e,         togglefullscreen, {0} },
+	{ MODKEY,                    XKB_KEY_e,           togglefullscreen, {0} },
-	{ MODKEY,                    XKB_KEY_0,          view,           {.ui = ~0} },
+	{ MODKEY,                    XKB_KEY_0,           view,             {.ui = ~0} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright, tag,            {.ui = ~0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_parenright,  tag,              {.ui = ~0} },
-	{ MODKEY,                    XKB_KEY_comma,      focusmon,       {.i = WLR_DIRECTION_LEFT} },
+	{ MODKEY,                    XKB_KEY_comma,       focusmon,         {.i = WLR_DIRECTION_LEFT} },
-	{ MODKEY,                    XKB_KEY_period,     focusmon,       {.i = WLR_DIRECTION_RIGHT} },
+	{ MODKEY,                    XKB_KEY_period,      focusmon,         {.i = WLR_DIRECTION_RIGHT} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_less,       tagmon,         {.i = WLR_DIRECTION_LEFT} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_less,        tagmon,           {.i = WLR_DIRECTION_LEFT} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_greater,    tagmon,         {.i = WLR_DIRECTION_RIGHT} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_greater,     tagmon,           {.i = WLR_DIRECTION_RIGHT} },
-	TAGKEYS(          XKB_KEY_1, XKB_KEY_exclam,                     0),
+	TAGKEYS(          XKB_KEY_1, XKB_KEY_exclam,                        0),
-	TAGKEYS(          XKB_KEY_2, XKB_KEY_at,                         1),
+	TAGKEYS(          XKB_KEY_2, XKB_KEY_at,                            1),
-	TAGKEYS(          XKB_KEY_3, XKB_KEY_numbersign,                 2),
+	TAGKEYS(          XKB_KEY_3, XKB_KEY_numbersign,                    2),
-	TAGKEYS(          XKB_KEY_4, XKB_KEY_dollar,                     3),
+	TAGKEYS(          XKB_KEY_4, XKB_KEY_dollar,                        3),
-	TAGKEYS(          XKB_KEY_5, XKB_KEY_percent,                    4),
+	TAGKEYS(          XKB_KEY_5, XKB_KEY_percent,                       4),
-	TAGKEYS(          XKB_KEY_6, XKB_KEY_asciicircum,                5),
+	TAGKEYS(          XKB_KEY_6, XKB_KEY_asciicircum,                   5),
-	TAGKEYS(          XKB_KEY_7, XKB_KEY_ampersand,                  6),
+	TAGKEYS(          XKB_KEY_7, XKB_KEY_ampersand,                     6),
-	TAGKEYS(          XKB_KEY_8, XKB_KEY_asterisk,                   7),
+	TAGKEYS(          XKB_KEY_8, XKB_KEY_asterisk,                      7),
-	TAGKEYS(          XKB_KEY_9, XKB_KEY_parenleft,                  8),
+	TAGKEYS(          XKB_KEY_9, XKB_KEY_parenleft,                     8),
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Q,          quit,           {0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_q,           quit,             {0} },
 
 	/* Ctrl-Alt-Backspace and Ctrl-Alt-Fx used to be handled by X server */
 	{ WLR_MODIFIER_CTRL|WLR_MODIFIER_ALT,XKB_KEY_Terminate_Server, quit, {0} },

config.mk

@@ -1,4 +1,4 @@
-_VERSION = 0.5
+_VERSION = 0.8-dev
 VERSION  = `git describe --tags --dirty 2>/dev/null || echo $(_VERSION)`
 
 PKG_CONFIG = pkg-config
@@ -8,8 +8,29 @@ PREFIX = /usr/local
 MANDIR = $(PREFIX)/share/man
 DATADIR = $(PREFIX)/share
 
+WLR_INCS = `$(PKG_CONFIG) --cflags wlroots-0.19`
+WLR_LIBS = `$(PKG_CONFIG) --libs wlroots-0.19`
+
+# Allow using an alternative wlroots installation
+# This has to have all the includes required by wlroots, e.g:
+# Assuming wlroots git repo is "${PWD}/wlroots" and you only ran "meson setup build && ninja -C build"
+#WLR_INCS = -I/usr/include/pixman-1 -I/usr/include/elogind -I/usr/include/libdrm \
+#	-I$(PWD)/wlroots/include
+# Set -rpath to avoid using the wrong library.
+#WLR_LIBS = -Wl,-rpath,$(PWD)/wlroots/build -L$(PWD)/wlroots/build -lwlroots-0.19
+
+# Assuming you ran "meson setup --prefix ${PWD}/0.19 build && ninja -C build install"
+#WLR_INCS = -I/usr/include/pixman-1 -I/usr/include/elogind -I/usr/include/libdrm \
+#	-I$(PWD)/wlroots/0.19/include/wlroots-0.19
+#WLR_LIBS = -Wl,-rpath,$(PWD)/wlroots/0.19/lib64 -L$(PWD)/wlroots/0.19/lib64 -lwlroots-0.19
+
 XWAYLAND =
 XLIBS =
 # Uncomment to build XWayland support
 #XWAYLAND = -DXWAYLAND
 #XLIBS = xcb xcb-icccm
+
+# dwl itself only uses C99 features, but wlroots' headers use anonymous unions (C11).
+# To avoid warnings about them, we do not use -std=c99 and instead of using the
+# gmake default 'CC=c99', we use cc.
+CC = cc

dwl.1

@@ -37,7 +37,7 @@ starts a shell process running
 when starting.
 When stopping, it sends
 .Dv SIGTERM
-to the child process and waits for it to exit.
+to the child process group and waits for it to exit.
 .Pp
 Users are encouraged to customize
 .Nm
@@ -55,10 +55,10 @@ Move window to a single tag.
 Toggle tag for window.
 .It Mod-p
 Spawn
-.Nm bemenu-run .
+.Xr wmenu-run 1 .
 .It Mod-Shift-Return
 Spawn
-.Nm foot .
+.Xr foot 1 .
 .It Mod-[jk]
 Move focus down/up the stack.
 .It Mod-[id]
@@ -100,6 +100,114 @@ Quit
 .Nm .
 .El
 These might differ depending on your keyboard layout.
+.Ss Mouse commands
+.Bl -tag -width 20n -offset indent -compact
+.It Mod-Button1
+Move focused window while dragging.
+Tiled windows will be toggled to the floating state.
+.It Mod-Button2
+Toggle focused window between floating and tiled state.
+.It Mod-Button3
+Resize focused window while dragging.
+Tiled windows will be toggled to the floating state.
+.El
+.Sh STATUS INFORMATION
+.Nm
+writes its status information to standard output.
+If the
+.Fl s
+option is given, the status information is written to the standard input of the
+child process instead.
+.Pp
+Said information has the following format:
+.Bd -ragged -offset indent
+.Ar <monitor>
+.Ar <component>
+.Ar <data>
+.Ed
+.Pp
+.Bl -tag -width 11n -offset 0 -compact
+.It Ar <monitor>
+is the name given to the output.
+.It Ar <component>
+is one of (in order)
+.Em title ,
+.Em appid ,
+.Em fullscreen ,
+.Em floating ,
+.Em selmon ,
+.Em tags ,
+.Em layout .
+.It Ar <data>
+changes depending on
+.Ar <component> .
+.Bl -tag -width 10n -compact
+.It Em title
+The title of the focused window on
+.Ar <monitor>
+or nothing if there is no focused window.
+.It Em appid
+The app_id of the focused window on
+.Ar <monitor>
+or nothing if there is no focused window.
+.It Em fullscreen
+Prints 1 if the focused window on
+.Ar <monitor>
+is in fullscreen state, otherwise prints 0. If there is no focused
+window it prints nothing.
+.It Em floating
+Prints 1 if the focused window on
+.Ar <monitor>
+is in floating state, otherwise prints 0. If there is no focused
+window it prints nothing.
+.It Em selmon
+Prints 1 if
+.Ar <monitor>
+is the selected monitor, otherwise prints 0.
+.It Em tags
+Prints four bitmasks in the following order:
+.Bl -bullet -width 2n -compact
+.It
+Occupied tags of
+.Ar <monitor> .
+.It
+Selected tags of
+.Ar <monitor> .
+.It
+Tags of the focused window on
+.Ar <monitor> .
+.It
+Tags where a window on
+.Ar <monitor>
+requested activation or has urgency hints.
+.El
+The bitmasks are 32-bit unsigned decimal integers.
+.It Em layout
+Prints the symbol of the current layout.
+.El
+.El
+.Ss Examples
+When there is a selected window:
+.Bd -literal -offset indent
+HDMI\-A\-1 title \(ti/source/repos/dwl > man \-l dwl.1
+HDMI\-A\-1 appid footclient
+HDMI\-A\-1 fullscreen 0
+HDMI\-A\-1 floating 0
+HDMI\-A\-1 selmon 1
+HDMI\-A\-1 tags 271 4 4 0
+HDMI\-A\-1 layout [T]
+.Ed
+.Pp
+When there is no selected window:
+.Bd -literal -offset indent
+HDMI\-A\-1 title
+HDMI\-A\-1 appid
+HDMI\-A\-1 fullscreen
+HDMI\-A\-1 floating
+HDMI\-A\-1 selmon 1
+HDMI\-A\-1 tags 271 512 0 0
+HDMI\-A\-1 layout [T]
+.Ed
 .Sh ENVIRONMENT
 These environment variables are used by
 .Nm :
@@ -140,19 +248,11 @@ server.
 Start
 .Nm
 with s6 in the background:
-.Dl dwl -s 's6-svscan <&-'
+.Dl dwl \-s \(aqs6\-svscan <&\-\(aq
 .Sh SEE ALSO
-.Xr foot 1 ,
-.Xr bemenu 1 ,
 .Xr dwm 1 ,
+.Xr foot 1 ,
+.Xr wmenu 1 ,
 .Xr xkeyboard-config 7
-.Sh CAVEATS
-The child process's standard input is connected with a pipe to
-.Nm .
-If the child process neither reads from the pipe nor closes its
-standard input,
-.Nm
-will freeze after a while due to it blocking when writing to the full
-pipe buffer.
 .Sh BUGS
 All of them.

protocols/wlr-output-power-management-unstable-v1.xml

@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="wlr_output_power_management_unstable_v1">
+  <copyright>
+    Copyright © 2019 Purism SPC
+
+    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 (including the next
+    paragraph) 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.
+  </copyright>
+
+  <description summary="Control power management modes of outputs">
+    This protocol allows clients to control power management modes
+    of outputs that are currently part of the compositor space. The
+    intent is to allow special clients like desktop shells to power
+    down outputs when the system is idle.
+
+    To modify outputs not currently part of the compositor space see
+    wlr-output-management.
+
+    Warning! The protocol described in this file is experimental and
+    backward incompatible changes may be made. Backward compatible changes
+    may be added together with the corresponding interface version bump.
+    Backward incompatible changes are done by bumping the version number in
+    the protocol and interface names and resetting the interface version.
+    Once the protocol is to be declared stable, the 'z' prefix and the
+    version number in the protocol and interface names are removed and the
+    interface version number is reset.
+  </description>
+
+  <interface name="zwlr_output_power_manager_v1" version="1">
+    <description summary="manager to create per-output power management">
+      This interface is a manager that allows creating per-output power
+      management mode controls.
+    </description>
+
+    <request name="get_output_power">
+      <description summary="get a power management for an output">
+        Create a output power management mode control that can be used to
+        adjust the power management mode for a given output.
+      </description>
+      <arg name="id" type="new_id" interface="zwlr_output_power_v1"/>
+      <arg name="output" type="object" interface="wl_output"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the manager">
+        All objects created by the manager will still remain valid, until their
+        appropriate destroy request has been called.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="zwlr_output_power_v1" version="1">
+    <description summary="adjust power management mode for an output">
+      This object offers requests to set the power management mode of
+      an output.
+    </description>
+
+    <enum name="mode">
+      <entry name="off" value="0"
+             summary="Output is turned off."/>
+      <entry name="on" value="1"
+             summary="Output is turned on, no power saving"/>
+    </enum>
+
+    <enum name="error">
+      <entry name="invalid_mode" value="1" summary="inexistent power save mode"/>
+    </enum>
+
+    <request name="set_mode">
+      <description summary="Set an outputs power save mode">
+        Set an output's power save mode to the given mode. The mode change
+        is effective immediately. If the output does not support the given
+        mode a failed event is sent.
+      </description>
+      <arg name="mode" type="uint" enum="mode" summary="the power save mode to set"/>
+    </request>
+
+    <event name="mode">
+      <description summary="Report a power management mode change">
+        Report the power management mode change of an output.
+
+        The mode event is sent after an output changed its power
+        management mode. The reason can be a client using set_mode or the
+        compositor deciding to change an output's mode.
+        This event is also sent immediately when the object is created
+        so the client is informed about the current power management mode.
+      </description>
+      <arg name="mode" type="uint" enum="mode"
+           summary="the output's new power management mode"/>
+    </event>
+
+    <event name="failed">
+      <description summary="object no longer valid">
+        This event indicates that the output power management mode control
+        is no longer valid. This can happen for a number of reasons,
+        including:
+        - The output doesn't support power management
+        - Another client already has exclusive power management mode control
+          for this output
+        - The output disappeared
+
+        Upon receiving this event, the client should destroy this object.
+      </description>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy this power management">
+        Destroys the output power management mode control object.
+      </description>
+    </request>
+  </interface>
+</protocol>

util.c

@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <fcntl.h>
 
 #include "util.h"
 
@@ -33,3 +34,18 @@ ecalloc(size_t nmemb, size_t size)
 		die("calloc:");
 	return p;
 }
+
+int
+fd_set_nonblock(int fd) {
+	int flags = fcntl(fd, F_GETFL);
+	if (flags < 0) {
+		perror("fcntl(F_GETFL):");
+		return -1;
+	}
+	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
+		perror("fcntl(F_SETFL):");
+		return -1;
+	}
+
+	return 0;
+}

util.h

@@ -2,3 +2,4 @@
 
 void die(const char *fmt, ...);
 void *ecalloc(size_t nmemb, size_t size);
+int fd_set_nonblock(int fd);