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07070100000000000081A400000000000000000000000165A4F7D200000029000000000000000000000000000000000000002100000000riverguile-0.1.0+git8/.gitignoreprotocol/*.c
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riverguile
07070100000001000081A400000000000000000000000165A4F7D20000894D000000000000000000000000000000000000001E00000000riverguile-0.1.0+git8/LICENSE                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Notwithstanding any other provision of this License, you have
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THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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17. Interpretation of Sections 15 and 16.

If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
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END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

<one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

<program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".

You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.

The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
07070100000002000081A400000000000000000000000165A4F7D20000067C000000000000000000000000000000000000001F00000000riverguile-0.1.0+git8/MakefileSCANNER := wayland-scanner

PREFIX=/usr/local
BINDIR=$(PREFIX)/bin
DATADIR=$(PREFIX)/share
MODULEDIR=$(DATADIR)/guile/3.0
MANDIR=$(DATADIR)/man

CFLAGS=-g -Wall -Werror -Wextra -Wpedantic -Wno-unused-parameter $\
	-Wno-overlength-strings -Wformat-security -Wformat -Wunused-result $\
	-I protocol $\
	$(shell pkg-config --cflags wayland-client) $\
	$(shell guile-config compile)
LIBS=-lrt $\
	$(shell pkg-config --libs wayland-client) $\
	$(shell guile-config link)
OBJ=src/riverguile.o $\
	src/seat.o src/output.o $\
	src/call-layout-demand-handler.o $\
	src/call-user-command-handler.o $\
	src/call-idle-handler.o $\
	src/call-exit-handler.o $\
	src/load-script.o $\
	protocol/river-layout-v3.o $\
	protocol/ext-idle-notify-v1.o $\
	protocol/river-control-unstable-v1.o
GEN=protocol/river-layout-v3.c protocol/river-layout-v3.h $\
	protocol/ext-idle-notify-v1.c protocol/ext-idle-notify-v1.h $\
	protocol/river-control-unstable-v1.c protocol/river-control-unstable-v1.h

all: riverguile

riverguile: $(OBJ)
	$(CC) $(LDFLAGS) -g -o $@ $(OBJ) $(LIBS)

$(OBJ): $(GEN)

%.c: %.xml
	$(SCANNER) private-code < $< > $@

%.h: %.xml
	$(SCANNER) client-header < $< > $@

install: riverguile
	install        -D riverguile            $(DESTDIR)$(BINDIR)/riverguile
	install -m 644 -D doc/riverguile.1      $(DESTDIR)$(MANDIR)/man1/riverguile.1
	install -m 644 -D module/riverguile.scm $(DESTDIR)$(MODULEDIR)/riverguile.scm

uninstall:
	$(RM) $(DESTDIR)$(BINDIR)/riverguile
	$(RM) $(DESTDIR)$(MANDIR)/man1/riverguile.1
	$(RM) $(DESTDIR)$(MODULEDIR)/riverguile.scm

clean:
	$(RM) riverguile
	$(RM) $(GEN)
	$(RM) $(OBJ)
	$(RM) $(IMG)

.PHONY: clean install uninstall all

07070100000003000081A400000000000000000000000165A4F7D200000913000000000000000000000000000000000000002000000000riverguile-0.1.0+git8/README.md# riverguile

Scripting layer for the [river](https://github.com/riverwm/river) Wayland
server using [Guile Scheme](https://www.gnu.org/software/guile/). Send commands
to river and install handlers for various events, including layout demands.

The ultimate aim of giverguile is to allow comfortable scripting in the context
of desktop operations, including window management.

> "So, the UNIX philosophy is nice and all, but I wish I could script my desktop
> in a way that's a bit more integrated and less hacky."

Do you agree with that statement? Do you like Lisp / Scheme? Do you believe
policy over mechanism is the only sane way to design a scripting API? Then
riverguile might be what you want!

Riverguile follows river development closely, exposing new functionality as
scheme procedures and advocating for even more scripting features. Right now,
riverguile is implemented as an interpreter for river init scripts.

```scheme
#!/bin/env riverguile
!#

(use-modules (riverguile))

;; Lock the screen after five minutes and darken the screen.
(install-handler 'idle:300 (lambda (event)
                             (cond ((eq? event 'idle) (system "swaylock &")
                                                      (system "backlight.sh set-to 40"))
                                   ((eq? event 'resume) (system "backlight.sh set-to 100")))))

(define split 0.55)

(define (layout:rows n x y w h)
        (letrec ((height (/ h n))
                 (rows (lambda (n)
                               (if (eq? n 0)
                                   '()
                                   (let ((Y (- (+ y h) (* n height))))
                                        (append (list (list x Y w height))
                                                (rows (- n 1))))))))
                (rows n)))

(define (layout:split n x y w h)
        (if (eq? n 1)
            (list (list x y w h))
            (letrec* ((left (* split w))
                      (right (- w left)))
                     (append (list (list x y left h))
                             (layout:rows (- n 1) (+ x left) y right h)))))

;; Replicate rivertile.
(R default-layout riverguile)
(install-handler 'layout-demand (lambda (view-count width height tags output)
                                  (layout:split view-count 0 0 width height)))
```
07070100000004000041ED00000000000000000000000265A4F7D200000000000000000000000000000000000000000000001A00000000riverguile-0.1.0+git8/doc07070100000005000081A400000000000000000000000165A4F7D2000024CA000000000000000000000000000000000000002700000000riverguile-0.1.0+git8/doc/riverguile.1.TH RIVERGUILE 1 2024-01-13 "git.sr.ht/~leon_plickat/riverguile" "General Commands Manual"
.
.SH NAME
.P
riverguile \- scheme powered scripting layer for river
.
.
.SH SYNOPSIS
.SY riverguile
path-to-script
.YS
.
.
.SH DESCRIPTION
.P
Scripting layer for the
.BR river (1)
Wayland server.
Allows the user to send commands to the Wayland server (probably river) and
install handlers for events from a scheme script.
The scheme implementation is provided by
.BR guile (1).
.P
The canonical way to use riverguile is as an interpreter for the river init
script.
To do so place the following expression at the very top of your init script:
.P
.RS
.EX
#!/bin/env riverguile
!#
.EE
.RE
.P
Do not leave out the second line, as the octothorpe plus exclamation-mark
combination indicates a multi-line comment in scheme.
Do not forget to mark your init script as executable.
Your custom scheme code to configure the river session may follow after these
two lines.
.P
By default, riverguile will exit after the script has been loaded.
However if certain handlers are installed it will run continuously to provide
that functionality.
.
.
.SH COMMANDS
.P
Riverguile exposes the special procedure
\fB(riverctl \fR\fIfirst\fR . \fIrest\fR\fB)\fR, which can be used to send
commands to the server in a similar fashion to
.BR riverctl (1).
All arguments must be strings.
.P
Here is an example of using this procedure to instruct river to spawn an
instance of the
.BR foot (1)
terminal emulator:
.P
.RS
.EX
(\fBriverctl\fR "spawn" "foot")
.EE
.RE
.P
Riverguile also provides a scheme module which exports macros that wrap this
procedure in a more ergonomic interface.
This module is documented in the \fBRIVERGUILE MODULE\fR section of this
document.
.
.
.SH EVENT HANDLERS
.P
Riverguile exposes the special procedure
\fB(install-handler \fR\fIkey\fR \fIproc\fR\fB)\fR, which can be used to install
event handlers.
The parameter \fIkey\fR is a symbol indicating for which event to install
the procedure \fIproc\fR.
The following keys are currently available:
.
.P
\fBlayout-demand\fR
.P
.RS
Installing a handler for this key allows the user to provide window layouts.
All limitations of the river-layout-v3 protocol apply.
The server will trigger this event when a new layout is required ("demanded").
.P
Installing a layout-demand handler will cause riverguile to run continuously.
.P
The handler procedure must accept five required arguments, which are, in order:
The amount of views in the layout (integer), the available width (integer), the
available height (integer), the currently active tag set (integer representing a
bitfield of size 32) and the global name of the output the layout is needed for
(integer).
The procedure must return a list containing exactly as many lists as there are
views in the layout.
Each of those sublists must contains exactly four numerical values, which are
the x and y coordinates of the window as well as its width and height.
Window positions and dimensions get applied to the window list top to bottom.
.P
Note that the numerical values do not need to be exact, riverguile takes care
of rounding and casting for you.
.P
Here is an example of a simple layout-demand handler which simply makes all
windows use all available space:
.P
.RS
.EX
(\fBinstall-handler\fR 'layout-demand
  (\fBlambda\fR (view-count width height tags output)
    (\fBletrec\fR ((iter (\fBlambda\fR (n)
                     (if (eq? 0 n)
                         '()
                         (\fBappend\fR (\fBlist\fR (\fBlist\fR 0 0 width height))
                                 (iter (1- n)))))))
      (iter view-count))))
.EE
.RE
.RE
.
.P
\fBuser-command\fR
.P
.RS
User commands are intended to allowing the user to update parameters of the
layout live.
The user sends a command - a string - to the server, which relays is to the
layout generator.
Of course, nothing is stopping you from (ab-)using this event to trigger
arbitrary scheme code on key presses or on outside events, or from simply not
using it at all.
Please see
.BR riverctl (1)
regarding how to send user commands and how to configure the server to send them
on key presses (note that usage of the riverctl executable maps one-to-one to
the usage of the riverguile procedure of the same name).
After a user-command has been received, the server will trigger a layout-demand
if there are visible windows.
.P
Installing a user-command handler will \fInot\fR cause riverguile to run continuously.
This event is an extension to the layout-demand event and as such it is invalid
to install a user-command handler without also installing a layout-demand
handler.
.P
The handler procedure must accept three arguments, which are, in order:
The command (string), the currently active tags (integer representing a
bitfield of size 32) and the global name of the output (integer).
.P
Here is an example of a simple user-command handler which simply evaluates the
string as scheme code:
.P
.RS
.EX
(\fBinstall-handler\fR 'user-command
  (\fBlambda\fR (cmd tags output)
    (\fBeval-string\fR cmd)))
.EE
.RE
.P
Note that this is not necessarily good practice, but serves as a decent example.
.RE
.
.P
\fBidle:X\fR
.P
.RS
A handler installed for this key will be triggered after the system has been
idle for \fIX\fR seconds and once more once the system is no longer idle.
.P
Installing an idle handler will cause riverguile to run continuously.
Multiple idle handlers can be installed.
.P
Idle state is server policy and may depend on a multitude of factors, but
usually maps directly to the usage activity of input devices by the user.
Certain programs may inhibit idle state, like for example video players.
.P
The handler procedure must accept one argument, a symbol indicating the type
of idle event.
This symbol is either \fBidle\fR, indicating the system has been idle for the
configured amount of time, or \fBresume\fR, indicating that the system is no
longer idle.
.P
Here is an example which will dim the screen after two minutes of inactivity
and lock it after five:
.P
.RS
.EX
(\fBinstall-handler\fR 'idle:120
  (\fBlambda\fR (event)
    (\fBcond\fR ((\fBeq?\fR event 'idle) (riverctl "spawn" "light -S 20"))
          ((\fBeq?\fR event 'resume) (riverctl "spawn" "light -S 100")))))

(\fBinstall-handler\fR 'idle:300
  (\fBlambda\fR (event)
    (if (\fBeq?\fR event 'idle) (riverctl "spawn" "swaylock"))))
.EE
.RE
.P
Note: All idle events relate to the first advertised seat.
As of now, river only supports a single seat anyway.
.RE
.
.P
\fBexit\fR
.RE
.RS
This key allows you to installs a handler which is called when riverguile exits.
.P
The procedure takes no arguments.
.P
Here is an example which adds a message to the system log on exit:
.P
.RS
.EX
(\fBinstall-handler\fR 'exit
  (\fBlambda\fR ()
    (riverctl "spawn" "logger 'goodbye from riverguile'")))
.EE
.RE
.RE
.
.
.SH RIVERGUILE MODULE
.P
A complete installation of riverguile also provides a scheme module which
exposes macros and procedures with the intention of exposing more ergonomic
interfaces.
.P
.RS
.EX
(\fBuse-modules\fR (riverguile))
.EE
.RE
.P
This module is not necessary to use riverguile and also will not provide any
of riverguiles functionality to any scheme script not executed by riverguile.
.P
The following documents all exported procedures and macros.
.
.P
(\fBR\fR \fIarg\fR ...)
.P
.RS
A direct wrapper for the \fBriverctl\fR procedure, however it also accepts 
symbols and numbers in addition to strings.
Any expressions you need evaluated must be unquoted.
.P
.RS
.EX
(R spawn foot)
(R spawn "notify-send hello")
 
(\fBfor-each\fR (\fBlambda\fR (cmd) (R spawn ,cmd))
          '("foot" "firefox" "nautilus"))
.EE
.RE
.RE
.
.P
(\fBR:map\fR \fImode\fR (\fImod\fR \fIkey\fR \fIcmd\fR ...) ...)
.P
.RS
This macro is intended to simplify defining keymaps.
Please refer to the
.BR riverctl (1)
manual page for more details and specifics regarding rivers map mechanism.
Any expressions you need evaluated must be unquoted.
.P
.RS
.EX
(R:map normal
  (Super H focus-view left)
  (Super Space spawn foot)
  (-repeat None XF86AudioRaiseVolume spawn "volume.sh raise 5%"))

(\fBfor-each\fR (\fBlambda\fR (mode)
            (R:map ,mode
              (None XF86MonBrightnessUp   spawn "light -A 5")
              (None XF86MonBrightnessDown spawn "light -U 5")))
          '("normal" "locked"))
.EE
.RE
.RE
.
.P
(\fBR:input\fR \fIname\fR (\fIval\fR \fIvar\fR ...) ...)
.P
.RS
This macro is intended to simplify input device configuration.
Please refer to the
.BR riverctl (1)
manual page for details and specifics regarding the input device configuration.
Any expressions you need evaluated must be unquoted.
.P
.RS
.EX
(R:input pointer-1149-4128-Kensington_Expert_mouse
  (accel-profile none)
  (pointer-accel 0.6)
  (scroll-method button)
  (scroll-button BTN_SIDE))
.EE
.RE
.RE
.
.P
(\fBR:keyboard-group\fR \fIname\fR . \fIdevices\fR)
.P
.RS
This macro is intended to simplify creation of keyboard groups.
Please refer to the
.BR riverctl (1)
manual page for details and specifics regarding keyboard groups.
Any expressions you need evaluated must be unquoted.
.P
.RS
.EX
(R:keyboard-group split
  keyboard-XXXX-XXXX-Device-1
  keyboard-XXXX-XXXX-Device-2
  keyboard-XXXX-XXXX-Device-3)
.EE
.RE
.RE
.
.
.SH SEE ALSO
.BR river (1),
.BR riverctl (1),
.BR rivertile (1),
.BR guile (1)
.
.
.SH AUTHOR
.P
.MT leonhenrik.plickat@stud.uni-goettingen.de
Leon Henrik Plickat
.ME
07070100000006000041ED00000000000000000000000265A4F7D200000000000000000000000000000000000000000000001D00000000riverguile-0.1.0+git8/module07070100000007000081A400000000000000000000000165A4F7D200000922000000000000000000000000000000000000002C00000000riverguile-0.1.0+git8/module/riverguile.scm;;;
;;; This file if part of riverguile, the scheme powered scripting layer for
;;; the river Wayland desktop.
;;;
;;; Copyright (C) 2024 Leon Henrik Plickat <leonhenrik.plickat@stud.uni-goettingen.de>
;;;
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public
;;; License version 3 as published by the Free Software Foundation.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;; Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this library; if not, write to the Free Software
;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

;; This module provides helper macros and procedures for riverguile and will not
;; be useful in any other context. The contents of this module are documented
;; in the riverguile.1 manual page.

(define-module (riverguile)
   #:export (R
             R:input
             R:map
             R:keyboard-group))

(define (stringify x)
  (cond ((string? x) x)
        ((number? x) (number->string x))
        ((symbol? x) (symbol->string x))))

(define-syntax R
  (syntax-rules ()
    ((R arg ...)
     (apply riverctl
            (map stringify `(arg ...))))))

(define-syntax R:map
  (syntax-rules ()
    ((R:map mode (mod key cmd ...) ...)
     (for-each (lambda (args)
                 (apply riverctl
                        (map stringify
                             (append `(map mode) args))))
               `((mod key cmd ...) ...)))))

(define-syntax R:input
  (syntax-rules ()
    ((R:input name (val var ...) ...)
     (for-each (lambda (args)
                 (apply riverctl
                        (map stringify
                             (append `(input name) args))))
               `((val var ...) ...)))))

(define-syntax R:keyboard-group
  (syntax-rules ()
    ((R:keyboard-group name . devices)
     (let ((N (stringify 'name))
           (D (map stringify 'devices)))
       (riverctl "keyboard-group-create" N)
       (for-each (lambda (d)
                   (riverctl "keyboard-group-add" N d))
                 D)))))

07070100000008000041ED00000000000000000000000265A4F7D200000000000000000000000000000000000000000000001F00000000riverguile-0.1.0+git8/protocol07070100000009000081A400000000000000000000000165A4F7D2000011AA000000000000000000000000000000000000003600000000riverguile-0.1.0+git8/protocol/ext-idle-notify-v1.xml<?xml version="1.0" encoding="UTF-8"?>
<protocol name="ext_idle_notify_v1">
  <copyright>
    Copyright © 2015 Martin Gräßlin
    Copyright © 2022 Simon Ser

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>

<interface name="ext_idle_notifier_v1" version="1">
    <description summary="idle notification manager">
      This interface allows clients to monitor user idle status.

After binding to this global, clients can create ext_idle_notification_v1
      objects to get notified when the user is idle for a given amount of time.
    </description>

<request name="destroy" type="destructor">
      <description summary="destroy the manager">
        Destroy the manager object. All objects created via this interface
        remain valid.
      </description>
    </request>

<request name="get_idle_notification">
      <description summary="create a notification object">
        Create a new idle notification object.

The notification object has a minimum timeout duration and is tied to a
        seat. The client will be notified if the seat is inactive for at least
        the provided timeout. See ext_idle_notification_v1 for more details.

A zero timeout is valid and means the client wants to be notified as
        soon as possible when the seat is inactive.
      </description>
      <arg name="id" type="new_id" interface="ext_idle_notification_v1"/>
      <arg name="timeout" type="uint" summary="minimum idle timeout in msec"/>
      <arg name="seat" type="object" interface="wl_seat"/>
    </request>
  </interface>

<interface name="ext_idle_notification_v1" version="1">
    <description summary="idle notification">
      This interface is used by the compositor to send idle notification events
      to clients.

Initially the notification object is not idle. The notification object
      becomes idle when no user activity has happened for at least the timeout
      duration, starting from the creation of the notification object. User
      activity may include input events or a presence sensor, but is
      compositor-specific. If an idle inhibitor is active (e.g. another client
      has created a zwp_idle_inhibitor_v1 on a visible surface), the compositor
      must not make the notification object idle.

When the notification object becomes idle, an idled event is sent. When
      user activity starts again, the notification object stops being idle,
      a resumed event is sent and the timeout is restarted.
    </description>

<request name="destroy" type="destructor">
      <description summary="destroy the notification object">
        Destroy the notification object.
      </description>
    </request>

<event name="idled">
      <description summary="notification object is idle">
        This event is sent when the notification object becomes idle.

It's a compositor protocol error to send this event twice without a
        resumed event in-between.
      </description>
    </event>

<event name="resumed">
      <description summary="notification object is no longer idle">
        This event is sent when the notification object stops being idle.

It's a compositor protocol error to send this event twice without an
        idled event in-between. It's a compositor protocol error to send this
        event prior to any idled event.
      </description>
    </event>
  </interface>
</protocol>
0707010000000A000081A400000000000000000000000165A4F7D200000E83000000000000000000000000000000000000003D00000000riverguile-0.1.0+git8/protocol/river-control-unstable-v1.xml<?xml version="1.0" encoding="UTF-8"?>
<protocol name="river_control_unstable_v1">
  <copyright>
    Copyright 2020 The River Developers

Permission to use, copy, modify, and/or distribute this software for any
    purpose with or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  </copyright>

<interface name="zriver_control_v1" version="1">
    <description summary="run compositor commands">
      This interface allows clients to run compositor commands and receive a
      success/failure response with output or a failure message respectively.

Each command is built up in a series of add_argument requests and
      executed with a run_command request. The first argument is the command
      to be run.

A complete list of commands should be made available in the man page of
      the compositor.
    </description>

<request name="destroy" type="destructor">
      <description summary="destroy the river_control object">
        This request indicates that the client will not use the
        river_control object any more. Objects that have been created
        through this instance are not affected.
      </description>
    </request>

<request name="add_argument">
      <description summary="add an argument to the current command">
        Arguments are stored by the server in the order they were sent until
        the run_command request is made.
      </description>
      <arg name="argument" type="string" summary="the argument to add"/>
    </request>

<request name="run_command">
      <description summary="run the current command">
        Execute the command built up using the add_argument request for the
        given seat.
      </description>
      <arg name="seat" type="object" interface="wl_seat"/>
      <arg name="callback" type="new_id" interface="zriver_command_callback_v1"
        summary="callback object"/>
    </request>
  </interface>

<interface name="zriver_command_callback_v1" version="1">
    <description summary="callback object">
      This object is created by the run_command request. Exactly one of the
      success or failure events will be sent. This object will be destroyed
      by the compositor after one of the events is sent.
    </description>

<event name="success" type="destructor">
      <description summary="command successful">
        Sent when the command has been successfully received and executed by
        the compositor. Some commands may produce output, in which case the
        output argument will be a non-empty string.
      </description>
      <arg name="output" type="string" summary="the output of the command"/>
    </event>

<event name="failure" type="destructor">
      <description summary="command failed">
        Sent when the command could not be carried out. This could be due to
        sending a non-existent command, no command, not enough arguments, too
        many arguments, invalid arguments, etc.
      </description>
      <arg name="failure_message" type="string"
        summary="a message explaining why failure occurred"/>
    </event>
  </interface>
</protocol>
0707010000000B000081A400000000000000000000000165A4F7D2000024EB000000000000000000000000000000000000003300000000riverguile-0.1.0+git8/protocol/river-layout-v3.xml<?xml version="1.0" encoding="UTF-8"?>
<protocol name="river_layout_v3">
  <copyright>
    Copyright 2020-2021 The River Developers

<description summary="let clients propose view positions and dimensions">
    This protocol specifies a way for clients to propose arbitrary positions
    and dimensions for a set of views on a specific output of a compositor
    through the river_layout_v3 object.

Layouts are a strictly linear list of views, the position and dimensions
    of which are supplied by the client. Any complex underlying data structure
    a client may use when generating the layout is lost in transmission. This
    is an intentional limitation.

Additionally, this protocol allows the compositor to deliver arbitrary
    user-provided commands associated with a layout to clients. A client
    may use these commands to implement runtime configuration/control, or
    may ignore them entirely. How the user provides these commands to the
    compositor is not specified by this protocol and left to compositor policy.

Warning! The protocol described in this file is currently in the
    testing phase. Backward compatible changes may be added together with
    the corresponding interface version bump. Backward incompatible changes
    can only be done by creating a new major version of the extension.
  </description>

<interface name="river_layout_manager_v3" version="2">
    <description summary="manage river layout objects">
      A global factory for river_layout_v3 objects.
    </description>

<request name="destroy" type="destructor">
      <description summary="destroy the river_layout_manager object">
        This request indicates that the client will not use the
        river_layout_manager object any more. Objects that have been created
        through this instance are not affected.
      </description>
    </request>

<request name="get_layout">
      <description summary="create a river_layout_v3 object">
        This creates a new river_layout_v3 object for the given wl_output.

All layout related communication is done through this interface.

The namespace is used by the compositor to decide which river_layout_v3
        object will receive layout demands for the output.

The namespace is required to be be unique per-output. Furthermore,
        two separate clients may not share a namespace on separate outputs. If
        these conditions are not upheld, the the namespace_in_use event will
        be sent directly after creation of the river_layout_v3 object.
      </description>
      <arg name="id" type="new_id" interface="river_layout_v3"/>
      <arg name="output" type="object" interface="wl_output"/>
      <arg name="namespace" type="string" summary="namespace of the layout object"/>
    </request>
  </interface>

<interface name="river_layout_v3" version="2">
    <description summary="receive and respond to layout demands">
      This interface allows clients to receive layout demands from the
      compositor for a specific output and subsequently propose positions and
      dimensions of individual views.
    </description>

<request name="destroy" type="destructor">
      <description summary="destroy the river_layout_v3 object">
        This request indicates that the client will not use the river_layout_v3
        object any more.
      </description>
    </request>

<event name="namespace_in_use">
      <description summary="the requested namespace is already in use">
        After this event is sent, all requests aside from the destroy event
        will be ignored by the server. If the client wishes to try again with
        a different namespace they must create a new river_layout_v3 object.
      </description>
    </event>

<event name="layout_demand">
      <description summary="the compositor requires a layout">
        The compositor sends this event to inform the client that it requires a
        layout for a set of views.

The usable width and height indicate the space in which the client
        can safely position views without interfering with desktop widgets
        such as panels.

The serial of this event is used to identify subsequent requests as
        belonging to this layout demand. Beware that the client might need
        to handle multiple layout demands at the same time.

The server will ignore responses to all but the most recent layout
        demand. Thus, clients are only required to respond to the most recent
        layout_demand received. If a newer layout_demand is received before
        the client has finished responding to an old demand, the client should
        abort work on the old demand as any further work would be wasted.
      </description>
      <arg name="view_count" type="uint" summary="number of views in the layout"/>
      <arg name="usable_width" type="uint" summary="width of the usable area"/>
      <arg name="usable_height" type="uint" summary="height of the usable area"/>
      <arg name="tags" type="uint" summary="tags of the output, 32-bit bitfield"/>
      <arg name="serial" type="uint" summary="serial of the layout demand"/>
    </event>

<request name="push_view_dimensions">
      <description summary="propose dimensions of the next view">
        This request proposes a size and position for a view in the layout demand
        with matching serial.

A client must send this request for every view that is part of the
        layout demand. The number of views in the layout is given by the
        view_count argument of the layout_demand event. Pushing too many or
        too few view dimensions is a protocol error.

The x and y coordinates are relative to the usable area of the output,
        with (0,0) as the top left corner.
      </description>
      <arg name="x" type="int" summary="x coordinate of view"/>
      <arg name="y" type="int" summary="y coordinate of view"/>
      <arg name="width" type="uint" summary="width of view"/>
      <arg name="height" type="uint" summary="height of view"/>
      <arg name="serial" type="uint" summary="serial of layout demand"/>
    </request>

<request name="commit">
      <description summary="commit a layout">
        This request indicates that the client is done pushing dimensions
        and the compositor may apply the layout. This completes the layout
        demand with matching serial, any other requests sent with the serial
        are a protocol error.

The layout_name argument is a user-facing name or short description
        of the layout that is being committed. The compositor may for example
        display this on a status bar, though what exactly is done with it is
        left to the compositor's discretion.

The compositor is free to use this proposed layout however it chooses,
        including ignoring it.
      </description>
      <arg name="layout_name" type="string" summary="name of committed layout"/>
      <arg name="serial" type="uint" summary="serial of layout demand"/>
    </request>

<event name="user_command">
      <description summary="a command sent by the user">
        This event informs the client of a command sent to it by the user.

The semantic meaning of the command is left for the client to
        decide. It is also free to ignore it entirely if it so chooses.

A layout_demand will be sent after this event if the compositor is
        currently using this layout object to arrange the output.

If version 2 or higher of the river_layout_v3 object is bound, the
        user_command_tags event is guaranteed to be sent directly before the
        user_command event.
      </description>
      <arg name="command" type="string"/>
    </event>

<event name="user_command_tags" since="2">
      <description summary="a command sent by the user">
        If version 2 or higher of the river_layout_v3 object is bound, this
        event will be sent directly before every user_command event. This allows
        layout generators to be aware of the active tags when a user command is
        sent. This is necessary for generators wanting to keep settings on a
        per-tag basis.
      </description>
      <arg name="tags" type="uint" summary="tags of the output, 32-bit bitfield"/>
    </event>
  </interface>
</protocol>
0707010000000C000041ED00000000000000000000000265A4F7D200000000000000000000000000000000000000000000001A00000000riverguile-0.1.0+git8/src0707010000000D000081A400000000000000000000000165A4F7D2000002EE000000000000000000000000000000000000002E00000000riverguile-0.1.0+git8/src/call-exit-handler.c#include <libguile.h>
#include <assert.h>

#include "riverguile.h"

static void *call_exit_handler_inner (void *data)
{
	assert(data == NULL);
	return scm_call_0(context.exit_handler);
}

void *call_exit_handler (void *data)
{
	assert(context.exit_handler != NULL);

/* Continuation barrier causes stack unwind on exceptions (i.e. errors
	 * in the user defined exit handler) to stop here. Otherwise the entire
         * stack created by scm_with_guile() would be unwound. This makes
         * responding to exceptions nicer.
	 */
	SCM call_result = scm_c_with_continuation_barrier(
		call_exit_handler_inner, NULL
	);

if ( call_result == NULL )
		return (void *)"ERROR: An exception occured while calling the exit handler.\n";

return NULL;
}
0707010000000E000081A400000000000000000000000165A4F7D20000007D000000000000000000000000000000000000002E00000000riverguile-0.1.0+git8/src/call-exit-handler.h#ifndef RIVERGUILE_CALL_EXIT_HANDLER_H
#define RIVERGUILE_CALL_EXIT_HANDLER_H

void *call_exit_handler (void* data);

#endif
0707010000000F000081A400000000000000000000000165A4F7D2000003C2000000000000000000000000000000000000002E00000000riverguile-0.1.0+git8/src/call-idle-handler.c#include <libguile.h>

#include "seat.h"
#include "call-idle-handler.h"

static void *call_idle_handler_inner (void *data)
{
	struct Call_idle_handler_parameters *params =
		(struct Call_idle_handler_parameters *)data;

SCM event;
	switch (params->event)
	{
		case IDLE:   event = scm_from_utf8_symbol("idle");   break;
		case RESUME: event = scm_from_utf8_symbol("resume"); break;
	}

return scm_call_1(params->idle->handler, event);
}

void *call_idle_handler (void *data)
{
	/* Continuation barrier causes stack unwind on exceptions (i.e. errors
	 * in the user defined idle handler) to stop here. Otherwise the entire
         * stack created by scm_with_guile() would be unwound. This makes
         * responding to exceptions nicer.
	 */
	SCM call_result = scm_c_with_continuation_barrier(
		call_idle_handler_inner, data
	);

if ( call_result == NULL )
		return (void *)"ERROR: An exception occured while calling the idle handler.\n";

return NULL;
}
07070100000010000081A400000000000000000000000165A4F7D20000011C000000000000000000000000000000000000002E00000000riverguile-0.1.0+git8/src/call-idle-handler.h#ifndef RIVERGUILE_CALL_IDLE_HANDLER_H
#define RIVERGUILE_CALL_IDLE_HANDLER_H

#include "seat.h"

enum Idle_handler_event
{
	IDLE,
	RESUME,
};

struct Call_idle_handler_parameters
{
	struct Idle *idle;
	enum Idle_handler_event event;
};

void *call_idle_handler (void *data);

#endif
07070100000011000081A400000000000000000000000165A4F7D200000BAC000000000000000000000000000000000000003700000000riverguile-0.1.0+git8/src/call-layout-demand-handler.c#include <assert.h>
#include <libguile.h>

#include "riverguile.h"
#include "output.h"
#include "river-layout-v3.h"
#include "call-layout-demand-handler.h"

static void *call_layout_demand_handler_inner (void *data)
{
	struct Call_layout_demand_handler_parameters *params = (struct Call_layout_demand_handler_parameters *)data;
	return scm_call_5(
		context.layout_demand_handler,
		scm_from_uint32(params->view_count),
		scm_from_uint32(params->width),
		scm_from_uint32(params->height),
		scm_from_uint32(params->tags),
		scm_from_uint32(params->output->name)
	);
}

void *call_layout_demand_handler (void *data)
{
	struct Call_layout_demand_handler_parameters *params = (struct Call_layout_demand_handler_parameters *)data;

assert(context.layout_demand_handler != NULL);
	assert(scm_is_true(scm_procedure_p(context.layout_demand_handler)) == 1);

/* Continuation barrier causes stack unwind on exceptions (i.e. errors
	 * in the user defined layout demand handler) to stop here. Otherwise
	 * the entire stack created by scm_with_guile() would be unwound. This
	 * makes responding to exceptions nicer.
	 */
	SCM call_result = scm_c_with_continuation_barrier(
		call_layout_demand_handler_inner, data
	);

if ( call_result == NULL )
		return (void *)"ERROR: An exception occured while calling the layout demand handler.\n";

/* Check integrity of data before firing off any Wayland requests. */
	if ( scm_is_false(scm_list_p(call_result)) == 1 )
		return (void *)"ERROR: layout-demand-handler did not return a list.\n";
	if ( params->view_count != scm_to_uint32(scm_length(call_result)) )
		return (void *)"ERROR: Length of list returned by layout-demand-handler does not match view count.\n";
	for (uint32_t i = 0; i < params->view_count; i++)
	{
		SCM elem = scm_list_ref(call_result, scm_from_uint32(i));
		if ( scm_is_false(scm_list_p(elem)) == 1 )
			return (void *)"ERROR: View dimensions list is not a list.\n";
		if ( scm_to_uint32(scm_length(elem)) != 4 )
			return (void *)"ERROR: View dimensions list length does not equal four (x, y, width, height).\n";
		for (uint8_t j = 0; j < 4; j++)
		{
			SCM list_elem = scm_list_ref(elem, scm_from_int(j));
			if ( scm_is_false(scm_number_p(list_elem)) == 1 )
				return (void *)"ERROR: Encountered non-numerical view dimensions.\n";
		}
	}

for (uint32_t i = 0; i < params->view_count; i++)
	{
		SCM elem = scm_list_ref(call_result, scm_from_uint32(i));
		uint32_t x = scm_to_uint32(scm_inexact_to_exact(
			scm_round_number(scm_list_ref(elem, scm_from_int(0)))));
		uint32_t y = scm_to_uint32(scm_inexact_to_exact(
			scm_round_number(scm_list_ref(elem, scm_from_int(1)))));
		uint32_t w = scm_to_uint32(scm_inexact_to_exact(
			scm_round_number(scm_list_ref(elem, scm_from_int(2)))));
		uint32_t h = scm_to_uint32(scm_inexact_to_exact(
			scm_round_number(scm_list_ref(elem, scm_from_int(3)))));

river_layout_v3_push_view_dimensions(
			params->output->layout,
			x, y, w, h,
			params->serial
		);
	}

return NULL;
}

07070100000012000081A400000000000000000000000165A4F7D20000012D000000000000000000000000000000000000003700000000riverguile-0.1.0+git8/src/call-layout-demand-handler.h#ifndef RIVERGUILE_CALL_LAYOUT_DEMAND_HANDLER_H
#define RIVERGUILE_CALL_LAYOUT_DEMAND_HANDLER_H

#include <libguile.h>

struct Call_layout_demand_handler_parameters
{
	uint32_t view_count, width, height, serial, tags;
	struct Output *output;
};

void *call_layout_demand_handler (void *data);

#endif
07070100000013000081A400000000000000000000000165A4F7D20000046B000000000000000000000000000000000000003600000000riverguile-0.1.0+git8/src/call-user-command-handler.c#include <assert.h>
#include <libguile.h>

#include "riverguile.h"
#include "output.h"
#include "call-user-command-handler.h"

static void *call_user_command_handler_inner (void *data)
{
	struct Call_user_command_parameters *params = (struct Call_user_command_parameters *)data;
	return scm_call_3(
		context.user_command_handler,
		scm_from_utf8_string(params->cmd),
		scm_from_uint32(params->output->user_command_tags),
		scm_from_uint32(params->output->name)
	);
}

void *call_user_command_handler (void *data)
{
	assert(context.user_command_handler != NULL);
	assert(scm_is_true(scm_procedure_p(context.user_command_handler)) == 1);

/* Continuation barrier causes stack unwind on exceptions (i.e. errors
	 * in the user defined user-command handler) to stop here. Otherwise
	 * the entire stack created by scm_with_guile() would be unwound. This
	 * makes responding to exceptions nicer.
	 */
	SCM call_result = scm_c_with_continuation_barrier(
		call_user_command_handler_inner, data
	);

if ( call_result == NULL )
		return (void *)"ERROR: An exception occured while calling the user-command handler.\n";

return NULL;
}
07070100000014000081A400000000000000000000000165A4F7D2000000FE000000000000000000000000000000000000003600000000riverguile-0.1.0+git8/src/call-user-command-handler.h#ifndef RIVERGUILE_CALL_USER_COMMAND_HANDLER_H
#define RIVERGUILE_CALL_USER_COMMAND_HANDLER_H

#include "output.h"

struct Call_user_command_parameters
{
	struct Output *output;
	const char *cmd;
};

void *call_user_command_handler (void *data);

#endif
07070100000015000081A400000000000000000000000165A4F7D20000208B000000000000000000000000000000000000002800000000riverguile-0.1.0+git8/src/load-script.c#include <assert.h>
#include <stdio.h>
#include <stdint.h>
#include <libguile.h>
#include <string.h>

#include "riverguile.h"
#include "output.h"
#include "seat.h"

#include "river-control-unstable-v1.h"

/**
 * ISO C forbids casting a function pointer to a void pointer because on some
 * architectures they have different sizes. However scm_c_define_gsubr() wants
 * a function pointer as a void pointer, which trips -Wpedantic. Compiling C
 * without pedantic errors is not a reasonable option in my opinion, so instead
 * we'll have to resort to this hack.
 */
#define scm_c_define_gsubr_fix(NAME, REQ, OPT, RST, FN) \
	{ const long int ptr = (long int)FN; scm_c_define_gsubr(NAME, REQ, OPT, RST, (void *)ptr); }

static uint32_t extract_ms_from_idle_key (SCM key)
{
	SCM key_split = scm_string_split(
		scm_symbol_to_string(key),
		scm_to_char_set(scm_from_utf8_string(":"))
	);
	if ( scm_to_uint32(scm_length(key_split)) != 2 )
		goto error;

SCM maybe_number = scm_string_to_number(scm_cadr(key_split), scm_from_int(10));
	if ( scm_is_false(maybe_number) == 1 )
		goto error;

int32_t ms = scm_to_int32(maybe_number);
	if ( ms < 0 )
		goto error;

return (uint32_t)ms * 1000;

error:
	scm_error_scm(
		scm_from_utf8_symbol("wrong-type-arg"),
		scm_from_utf8_string("install-handler"),
		scm_from_utf8_string("First argument: Excpected 'idle:<positive integer>."),
		SCM_BOOL_F,
		scm_list_1(key)
	);
	return 0;
}

static SCM install_handler (SCM key, SCM proc)
{
	if ( scm_is_false(scm_symbol_p(key)) == 1 )
	{
		scm_error_scm(
			scm_from_utf8_symbol("wrong-type-arg"),
			scm_from_utf8_string("install-handler"),
			scm_from_utf8_string("First argument must be a symbol."),
			SCM_BOOL_F,
			scm_list_1(key)
		);
		return SCM_UNSPECIFIED;
	}

// TODO check if the procedure has the right amount of arguments.
	if ( scm_is_false(scm_procedure_p(proc)) == 1 )
	{
		scm_error_scm(
			scm_from_utf8_symbol("wrong-type-arg"),
			scm_from_utf8_string("install-handler"),
			scm_from_utf8_string("Second argument must be a procedure."),
			SCM_BOOL_F,
			scm_list_1(proc)
		);
		return SCM_UNSPECIFIED;
	}

if ( scm_is_eq(scm_from_utf8_symbol("layout-demand"), key) == 1 )
	{
		if ( context.layout_manager == NULL )
		{
			fputs("ERROR: Trying to install layout-demand handler but server does not support river-layout-v3.\n", stderr);
			fputs("INFO: This error is not fatal, but means riverguile will not provide any layout.\n", stderr);
			return SCM_BOOL_F;
		}

context.mode = CONTINOUS;
		context.layout_demand_handler = proc;

/* Configure all outputs to expose layouts. */
		struct Output *output;
		wl_list_for_each(output, &context.outputs, link)
			output_configure_layout(output);
	}
	else if ( scm_is_eq(scm_from_utf8_symbol("user-command"), key) == 1)
	{
		/* No need to check if the interface exists since it's only
		 * used when a layout-demand handler is configured.
		 */
		context.user_command_handler = proc;
	}
	else if ( scm_is_eq(scm_from_utf8_symbol("exit"), key) == 1)
		context.exit_handler = proc;
	else if ( scm_is_true(scm_string_prefix_p(scm_from_utf8_string("idle:"), scm_symbol_to_string(key),
		scm_from_int(0), scm_from_int(5),
		scm_from_int(0), scm_string_length(scm_symbol_to_string(key)))) == 1 )
	{
		if ( context.idle_notifier == NULL )
		{
			fputs("ERROR: Trying to install idle handler but server does not support ext-idle-notify-v1.\n", stderr);
			fputs("INFO: This error is not fatal, but means riverguile will not be able to call any idle handler.\n", stderr);
			return SCM_BOOL_F;
		}
		if ( wl_list_length(&context.seats) == 0 )
		{
			fputs("ERROR: Trying to install idle handler but server did not advertise any seats.\n", stderr);
			fputs("INFO: This error is not fatal, but means riverguile will not be able to call any idle handler.\n", stderr);
			return SCM_BOOL_F;
		}

context.mode = CONTINOUS;

/* Just use the first seat. River only supports a single one anyway. */
		struct Seat *seat;
		wl_list_for_each(seat, &context.seats, link)
			break;

uint32_t ms = extract_ms_from_idle_key(key);

if (!seat_add_idle(seat, proc, ms))
		{
			scm_error_scm(
				scm_from_utf8_symbol("memory-allocation-error"),
				scm_from_utf8_string("install-handler"),
				SCM_BOOL_F,
				SCM_BOOL_F,
				SCM_BOOL_F
			);
			return SCM_UNSPECIFIED;
		}
	}
	else
	{
		scm_error_scm(
			// TODO should this be 'misc-error instead?
			scm_from_utf8_symbol("out-of-range"),
			scm_from_utf8_string("install-handler"),
			scm_from_utf8_string("Unknown key: ~A"),
			scm_list_1(key),
			scm_list_1(key)
		);
		return SCM_UNSPECIFIED;
	}

return SCM_BOOL_T;
}

static SCM riverctl (SCM first, SCM rest)
{
	if ( context.river_control == NULL )
	{
		fputs("ERROR: User script attempts to send river command but river-control-unstable-v1 not available.\n", stderr);
		fputs("INFO: This error is not fatal, however riverguile will not be able to send any commands to river.\n", stderr);
		return SCM_BOOL_F;
	}
	if ( wl_list_length(&context.seats) == 0 )
	{
		fputs("ERROR: User script attempts to send river command but server did not advertise any seats.\n", stderr);
		fputs("INFO: This error is not fatal, however riverguile will not be able to send any commands to river.\n", stderr);
		return SCM_BOOL_F;
	}

if ( scm_is_string(first) != 1 )
		goto error;

assert(scm_is_true(scm_list_p(rest)) == 1);
	const uint32_t rest_len = scm_to_uint32(scm_length(rest));
	for (uint32_t i = 0; i < rest_len; i++)
		if ( scm_is_string(scm_list_ref(rest, scm_from_uint32(i))) != 1 )
			goto error;

char *first_owned = scm_to_utf8_stringn(first, 0);
	zriver_control_v1_add_argument(context.river_control, first_owned);
	free(first_owned);

for (uint32_t i = 0; i < rest_len; i++)
	{
		char *owned = scm_to_utf8_stringn(scm_list_ref(rest, scm_from_uint32(i)), 0);
		zriver_control_v1_add_argument(context.river_control, owned);
		free(owned);
	}

/* Just use the first seat. River only supports a single one anyway. */
	struct Seat *seat;
	wl_list_for_each(seat, &context.seats, link)
		break;

/* While river does tell us about the status of the command, I do not
	 * want to make use of that in riverguile for multiple reasons.
	 * For one, the reporting is of course async, meaning we could not raise
	 * a guile error in response to failed commands, even if we wanted to.
	 * Riverguile could allow to install a handler for the callback, however
	 * I do not sett the use. There are two riverctl commands that return
	 * useful data as a string, however using that for scripting would be
	 * very hacky and I prefer dedicated well designed interfaces. So we
	 * just destroy the callback before it even fires.
	 */
	zriver_command_callback_v1_destroy(
		zriver_control_v1_run_command(context.river_control, seat->wl_seat)
	);

return SCM_BOOL_T;
error:
	scm_error_scm(
		scm_from_utf8_symbol("wrong-type-arg"),
		scm_from_utf8_string("riverctl"),
		scm_from_utf8_string("All arguments must be strings."),
		SCM_BOOL_F,
		SCM_BOOL_F
	);
	return SCM_UNSPECIFIED;
}

static void *load_script_inner (void *data)
{
	const char *path = (char *)data;

/* scm_primitive_load_path() searches guiles load-path when encountering
	 * a relative path. That should never happen here though.
	 */
	assert(path[0] == '/');

return scm_primitive_load_path(scm_from_utf8_string(path));
}

void *load_script (void *data)
{
	/* Note: All guile objects are garbage collected. */

scm_c_define_gsubr_fix("install-handler", 2, 0, 0, install_handler);
	scm_c_define_gsubr_fix("riverctl", 1, 0, 1, riverctl);

/* Continuation barrier causes stack unwind on exceptions to stop here.
	 * Otherwise the entire stack created by scm_with_guile() would be
	 * unwound. This makes responding to exceptions nicer.
	 */
	SCM call_result = scm_c_with_continuation_barrier(
		load_script_inner, data
	);

if ( call_result == NULL )
		return (void *)"ERROR: Fatal error while loading layout script.\n";

/* Checked in the installer functions. */
	if ( context.layout_demand_handler != NULL )
		assert(scm_is_true(scm_procedure_p(context.layout_demand_handler)) == 1);
	if ( context.user_command_handler != NULL )
		assert(scm_is_true(scm_procedure_p(context.user_command_handler)) == 1);
	if ( context.exit_handler != NULL )
		assert(scm_is_true(scm_procedure_p(context.exit_handler)) == 1);

return NULL;
}

07070100000016000081A400000000000000000000000165A4F7D20000007D000000000000000000000000000000000000002800000000riverguile-0.1.0+git8/src/load-script.h#ifndef RIVERGUILE_LOAD_SCRIPT_H_INCLUDED
#define RIVERGUILE_LOAD_SCRIPT_H_INCLUDED

void *load_script (void *data);

#endif
07070100000017000081A400000000000000000000000165A4F7D200000D55000000000000000000000000000000000000002300000000riverguile-0.1.0+git8/src/output.c#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <libguile.h>
#include <assert.h>

#include "river-layout-v3.h"

#include "riverguile.h"
#include "output.h"
#include "call-layout-demand-handler.h"
#include "call-user-command-handler.h"

static void layout_handle_layout_demand (void *data, struct river_layout_v3 *river_layout_v3,
		uint32_t view_count, uint32_t width, uint32_t height, uint32_t tags, uint32_t serial)
{
	struct Output *output = (struct Output *)data;

struct Call_layout_demand_handler_parameters params = {
		.view_count = view_count,
		.width = width,
		.height = height,
		.serial = serial,
		.tags = tags,
		.output = output,
	};

void *res = scm_with_guile(call_layout_demand_handler, (void *)&params);
	if ( res != NULL )
	{
		fputs(res, stderr);
		fputs("INFO: This error is not fatal.\n", stderr);
		return;
	}

// TODO allow setting layout name from user installed layout demand handler
	river_layout_v3_commit(output->layout, "(🐦)", serial);
}

static void layout_handle_user_command (void *data,
		struct river_layout_v3 *river_layout, const char *command)
{
	if ( context.user_command_handler == NULL )
		return;

struct Output *output = (struct Output *)data;

struct Call_user_command_parameters params = {
		.cmd = command,
		.output = output,
	};

void *res = scm_with_guile(call_user_command_handler, (void *)&params);
	if ( res != NULL )
	{
		fputs(res, stderr);
		fputs("INFO: This error is not fatal.\n", stderr);
	}
}

static void layout_handle_user_command_tags (void *data,
		struct river_layout_v3 *river_layout, uint32_t tags)
{
	struct Output *output = (struct Output *)data;
	output->user_command_tags = tags;
}

static void layout_handle_namespace_in_use (void *data, struct river_layout_v3 *river_layout_v3)
{
	fputs("ERROR: Namespace already in use.\n", stderr);
	context.ret = EXIT_FAILURE;
	context.loop = false;
}

static const struct river_layout_v3_listener layout_listener = {
	.namespace_in_use  = layout_handle_namespace_in_use,
	.layout_demand     = layout_handle_layout_demand,
	.user_command      = layout_handle_user_command,
	.user_command_tags = layout_handle_user_command_tags,
};

void output_configure_layout (struct Output *output)
{
	assert(context.layout_manager != NULL);
	assert(context.layout_demand_handler != NULL);

if ( output->layout != NULL )
		return;
	output->layout = river_layout_manager_v3_get_layout(

context.layout_manager, output->wl_output, "riverguile"
	);
	river_layout_v3_add_listener(output->layout, &layout_listener, output);
}

struct Output *output_create (struct wl_output *wl_output, uint32_t name)
{
	struct Output *output = calloc(1, sizeof(struct Output));
	if ( output == NULL )
	{
		fprintf(stderr, "ERROR: calloc: %s\n", strerror(errno));
		return NULL;
	}

output->name = name;
	output->wl_output = wl_output;

/* Only bind layout if we need it. Outputs advertised in the initial
	 * registry burst, before the script is loaded, will always skip this,
	 * however it is necessary for outputs added later.
	 */
	if ( context.layout_manager != NULL && context.layout_demand_handler != NULL )
		output_configure_layout(output);

return output;
}

void output_destroy (struct Output *output)
{
	if ( output->layout != NULL )
		river_layout_v3_destroy(output->layout);
	assert(output->wl_output != NULL);
	wl_output_destroy(output->wl_output);
	free(output);
}

07070100000018000081A400000000000000000000000165A4F7D2000002D2000000000000000000000000000000000000002300000000riverguile-0.1.0+git8/src/output.h#ifndef RIVERGUILE_OUTPUT_H
#define RIVERGUILE_OUTPUT_H

#include <stdbool.h>
#include <wayland-client.h>

#include "river-layout-v3.h"

struct Output
{
	struct wl_list link;
	struct wl_output *wl_output;
	struct river_layout_v3 *layout;
	uint32_t name;

/* Tags for the next user command. Due to backwards compatability, the
	 * layout protocol sends us the currently active tags for a user command
	 * in a separate event before the actual user command. This event is
	 * guaranteed to be received.
	 */
	uint32_t user_command_tags;
};

struct Output *output_create (struct wl_output *wl_output, uint32_t name);
void output_destroy (struct Output *output);
void output_configure_layout (struct Output *output);

#endif
07070100000019000081A400000000000000000000000165A4F7D2000029C9000000000000000000000000000000000000002700000000riverguile-0.1.0+git8/src/riverguile.c#include <ctype.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <setjmp.h>
#include <wayland-client.h>
#include <libguile.h>

#ifdef __linux__
#include <features.h>
#ifdef __GLIBC__
#include<execinfo.h>
#endif
#endif

#include "river-layout-v3.h"
#include "ext-idle-notify-v1.h"
#include "river-control-unstable-v1.h"

#include "load-script.h"
#include "call-exit-handler.h"
#include "riverguile.h"
#include "output.h"
#include "seat.h"

struct Context context = {
	/* Handlers are initially NULL instead of SCM_EOL because I am not sure whether
	 * scm_null_p() is safe to use outside of a guile context and if yes, whether
	 * that is intended or will disappear in the future. Special care must be taken
	 * to never call any scm_* function on these while they are NULL.
	 */
	.layout_demand_handler = NULL,
	.user_command_handler = NULL,
	.exit_handler = NULL,

.loop = true,
	.ret = EXIT_SUCCESS,
};

jmp_buf skip_main_loop;

static void registry_handle_global (void *data, struct wl_registry *registry,
		uint32_t name, const char *interface, uint32_t version)
{
	if ( strcmp(interface, river_layout_manager_v3_interface.name) == 0 )
	{
		context.layout_manager = wl_registry_bind(
			registry, name, &river_layout_manager_v3_interface, 2
		);
	}
	else if ( strcmp(interface, zriver_control_v1_interface.name) == 0 )
	{
		context.river_control = wl_registry_bind(
			registry, name, &zriver_control_v1_interface, 1
		);
	}
	else if ( strcmp(interface, ext_idle_notifier_v1_interface.name) == 0 )
	{
		context.idle_notifier = wl_registry_bind(
			registry, name, &ext_idle_notifier_v1_interface, 1
		);
	}
	else if ( strcmp(interface, wl_output_interface.name) == 0 )
	{
		struct wl_output *wl_output = wl_registry_bind(
			registry, name, &wl_output_interface, 1
		);
		struct Output *output = output_create(wl_output, name);
		if ( output == NULL )
		{
			wl_output_destroy(wl_output);
			context.ret = EXIT_FAILURE;
			context.loop = false;
			return;
		}
		wl_list_insert(&context.outputs, &output->link);
	}
	else if ( strcmp(interface, wl_seat_interface.name) == 0 )
	{
		struct wl_seat *wl_seat = wl_registry_bind(
			registry, name, &wl_seat_interface, 1
		);
		struct Seat *seat = seat_create(wl_seat, name);
		if ( seat == NULL )
		{
			wl_seat_destroy(wl_seat);
			context.ret = EXIT_FAILURE;
			context.loop = false;
			return;
		}
		wl_list_insert(&context.seats, &seat->link);
	}
}

static void registry_handle_global_remove (void *data, struct wl_registry *registry,
		uint32_t name)
{
	struct Output *output, *tmp_o;
	wl_list_for_each_safe(output, tmp_o, &context.outputs, link)
	{
		if ( output->name != name )
			continue;
		wl_list_remove(&output->link);
		output_destroy(output);
		return;
	}

struct Seat *seat, *tmp_s;
	wl_list_for_each_safe(seat, tmp_s, &context.seats, link)
	{
		if ( seat->name != name )
			continue;
		wl_list_remove(&seat->link);
		seat_destroy(seat);
		return;
	}
}

static const struct wl_registry_listener registry_listener = {
	.global        = registry_handle_global,
	.global_remove = registry_handle_global_remove,
};

static void sync_handle_done (void *, struct wl_callback *, uint32_t);
static const struct wl_callback_listener sync_callback_listener = {
	.done = sync_handle_done,
};

static void sync_handle_done (void *data, struct wl_callback *wl_callback, uint32_t other_data)
{
	static int i = 0;
	if ( i == 1 )
	{
		assert(context.mode == ONESHOT);
		context.loop = false;
		return;
	}

wl_callback_destroy(wl_callback);
	context.sync_callback = NULL;

/* Load the script after connecting to the server and binding interfaces
	 * to allow calling Wayland requests from it.
	 */
	assert(context.path != NULL);
	void *res = scm_with_guile(load_script, (void *)context.path);
	if ( res != NULL )
	{
		fputs((char *)res, stderr);
		context.ret = EXIT_FAILURE;
		context.loop = false;
		return;
	}

if ( context.layout_demand_handler == NULL
		&& context.user_command_handler != NULL )
	{
		fputs("ERROR: Installing user-command handler without installing a layout-demand handler is not allowed.\n", stderr);
		fputs("INFO: This error is not fatal, but means riverguile will not provide any layout.\n", stderr);
	}

switch (context.mode)
	{
		case ONESHOT:
			/* Oneshot mode. Sync again so we are sure that all commands
			 * have been send, then exit.
			 */
			assert(i == 0);
			i++;
			context.sync_callback = wl_display_sync(context.wl_display);
			wl_callback_add_listener(context.sync_callback, &sync_callback_listener, NULL);
			fputs("INFO: No handlers installed: Riverguile will exit.\n", stderr);
			break;

case CONTINOUS:
			fputs("INFO: At least one handler installed: Riverguile will run continously.\n", stderr);
			break;
	}
}

static void handle_interrupt (int signum)
{
	fputs("INFO: Killed 💀\n", stderr);
	context.loop = false;
	longjmp(skip_main_loop, 1);
}

/**
 * Intercept error signals (like SIGSEGV and SIGFPE) so that we can try to
 * print a fancy error message and a backtracke before letting the system kill us.
 */
static void handle_error (int signum)
{
	const char *msg =
		"\n"
		"┌──────────────────────────────────────────┐\n"
		"│                                          │\n"
		"│         riverguile has crashed.          │\n"
		"│                                          │\n"
		"│   This is most likely a bug, so please   │\n"
		"│     report this to the mailing list.     │\n"
		"│                                          │\n"
		"│  ~leon_plickat/public-inbox@lists.sr.ht  │\n"
		"│                                          │\n"
		"└──────────────────────────────────────────┘\n"
		"\n";
	fputs(msg, stderr);

/* Set up the default handlers to deal with the rest. We do this before
	 * attempting to get a backtrace, because sometimes that could also
	 * cause a SEGFAULT and we don't want a funny signal loop to happen.
	 */
	signal(signum, SIG_DFL);

#ifdef __linux__
#ifdef __GLIBC__
	fputs("Attempting to get backtrace:\n", stderr);
	void *buffer[255];
	const int calls = backtrace(buffer, sizeof(buffer) / sizeof(void *));
	backtrace_symbols_fd(buffer, calls, fileno(stderr));
	fputs("\n", stderr);
#endif
#endif

/* Easiest way of calling the default signal handler. */
	kill(getpid(), signum);
}

static char *formatted_buffer (const char *fmt, ...)
{
	/* Determine length of formatted text. */
	va_list args;
	va_start(args, fmt);
	/* +1 for NULL. */
	unsigned long len = (unsigned long)vsnprintf(NULL, 0, fmt, args) + 1;
	va_end(args);

char *buffer = calloc(1, len);
	if ( buffer == NULL )
	{
		fprintf(stderr, "ERROR: calloc: %s\n", strerror(errno));
		return NULL;
	}

/* Finally write formatted text into buffer. */
	va_start(args, fmt);
	vsnprintf(buffer, len, fmt, args);
	va_end(args);

return buffer;
}

static char *get_script_path (char *relative_path)
{
	assert(relative_path != NULL);

char *path = NULL;
	if ( relative_path[0] == '/' )
		path = formatted_buffer("%s", relative_path);
	else
	{
		/* When scm_primitive_load_path() receives a relative path, it
		 * tries to look it up in the guile module path. So we must
		 * always provide it an absolute path.
		 */
		char buffer[4 * 1024];
		char *cwd = getcwd(buffer, 4 * 1024);
		if ( cwd == NULL )
		{
			fprintf(stderr, "ERROR: getcwd: %s\n", strerror(errno));
			return NULL;
		}

path = formatted_buffer("%s/%s", cwd, relative_path);
	}
	if ( path == NULL )
		return NULL;

if ( access(path, R_OK) != 0 )
	{
		fprintf(stderr, "ERROR: Script '%s' is not readable.\n", path);
		free(path);
		return NULL;
	}

return path;
}

int main (int argc, char *argv[])
{
	if ( argc != 2
		|| strcmp(argv[1], "--help") == 0
		|| strcmp(argv[1], "-h") == 0
		|| strcmp(argv[1], "-?") == 0 )
	{
		fprintf(stderr, "USAGE: %s path-to-script\n", argv[0]);
		return EXIT_FAILURE;
	}

fputs("INFO: Welcome to riverguile!\n", stderr);

signal(SIGSEGV, handle_error);
	signal(SIGFPE, handle_error);
	signal(SIGINT, handle_interrupt);

context.path = get_script_path(argv[1]);
	if ( context.path == NULL )
	{
		context.ret = EXIT_FAILURE;
		goto early_exit;
	}
	fprintf(stderr, "INFO: Using script: %s\n", context.path);

wl_list_init(&context.outputs);
	wl_list_init(&context.seats);

/* We query the display name here instead of letting wl_display_connect()
	 * figure it out itself, because libwayland (for legacy reasons) falls
	 * back to using "wayland-0" when $WAYLAND_DISPLAY is not set, which is
	 * generally not desirable.
	 */
	const char *display_name = getenv("WAYLAND_DISPLAY");
	if ( display_name == NULL )
	{
		fputs("ERROR: WAYLAND_DISPLAY is not set.\n", stderr);
		context.ret = EXIT_FAILURE;
		goto early_exit;
	}

context.wl_display = wl_display_connect(display_name);
	if ( context.wl_display == NULL )
	{
		fputs("ERROR: Can not connect to wayland display.\n", stderr);
		context.ret = EXIT_FAILURE;
		goto early_exit;
	}

context.wl_registry = wl_display_get_registry(context.wl_display);
	wl_registry_add_listener(context.wl_registry, &registry_listener, NULL);

context.sync_callback = wl_display_sync(context.wl_display);
	wl_callback_add_listener(context.sync_callback, &sync_callback_listener, NULL);

if ( setjmp(skip_main_loop) == 0 )
		while ( context.loop && wl_display_dispatch(context.wl_display) > 0 );

if ( context.exit_handler != NULL )
	{
		void *res = scm_with_guile(call_exit_handler, NULL);
		if ( res != NULL )
		{
			fputs((char *)res, stderr);
			context.ret = EXIT_FAILURE;
			context.loop = false;
		}
	}

struct Output *output, *tmp_o;
	wl_list_for_each_safe(output, tmp_o, &context.outputs, link)
	{
		wl_list_remove(&output->link);
		output_destroy(output);
	}

struct Seat *seat, *tmp_s;
	wl_list_for_each_safe(seat, tmp_s, &context.seats, link)
	{
		wl_list_remove(&seat->link);
		seat_destroy(seat);
	}

if ( context.idle_notifier != NULL )
		ext_idle_notifier_v1_destroy(context.idle_notifier);
	if ( context.layout_manager != NULL )
		river_layout_manager_v3_destroy(context.layout_manager);
	if ( context.river_control != NULL )
		zriver_control_v1_destroy(context.river_control);
	if ( context.sync_callback != NULL )
		wl_callback_destroy(context.sync_callback);
	if ( context.wl_registry != NULL )
		wl_registry_destroy(context.wl_registry);
	wl_display_disconnect(context.wl_display);

early_exit:
	if ( context.path != NULL )
		free(context.path);

fputs("INFO: Exiting.\n", stderr);
	return context.ret;
}

0707010000001A000081A400000000000000000000000165A4F7D2000003C3000000000000000000000000000000000000002700000000riverguile-0.1.0+git8/src/riverguile.h#ifndef RIVERGUILE_RIVERGUILE_H
#define RIVERGUILE_RIVERGUILE_H

#include <stdbool.h>
#include <wayland-client.h>
#include <libguile.h>

#include "seat.h"

enum Riverguile_mode
{
	/* Riverguile is used only for configuring river and will exit after
	 * the init script has been loaded.
	 */
	ONESHOT = 0,

/* Riverguile need to run continous, because we have handlers installed
	 * f.e. for layouts or idle.
	 */
	CONTINOUS,
};

struct Context
{
	SCM layout_demand_handler;
	SCM user_command_handler;
	SCM exit_handler;

enum Riverguile_mode mode;
	bool loop;
	int ret;

struct wl_display              *wl_display;
	struct wl_registry             *wl_registry;
	struct wl_callback             *sync_callback;
	struct river_layout_manager_v3 *layout_manager;
	struct ext_idle_notifier_v1    *idle_notifier;
	struct zriver_control_v1       *river_control;

struct wl_list seats;
	struct wl_list outputs;

char *path;
};

extern struct Context context;

#endif
0707010000001B000081A400000000000000000000000165A4F7D200000ACE000000000000000000000000000000000000002100000000riverguile-0.1.0+git8/src/seat.c#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <assert.h>

#include "ext-idle-notify-v1.h"

#include "riverguile.h"
#include "seat.h"
#include "call-idle-handler.h"

static void idle_notification_handle_idled (void *data,
		      struct ext_idle_notification_v1 *ext_idle_notification_v1)
{
	struct Idle *idle = (struct Idle *)data;
	assert(idle->handler != NULL);

struct Call_idle_handler_parameters params = {
		.idle = idle,
		.event = IDLE,
	};
	void *res = scm_with_guile(call_idle_handler, &params);
	if ( res != NULL )
		fputs((char *)res, stderr);
}

static void idle_notification_handle_resumed (void *data,
		      struct ext_idle_notification_v1 *ext_idle_notification_v1)
{
	struct Idle *idle = (struct Idle *)data;
	assert(idle->handler != NULL);

struct Call_idle_handler_parameters params = {
		.idle = idle,
		.event = RESUME,
	};
	void *res = scm_with_guile(call_idle_handler, &params);
	if ( res != NULL )
		fputs((char *)res, stderr);
}

static const struct ext_idle_notification_v1_listener idle_notification_listener = {
	.idled = idle_notification_handle_idled,
	.resumed = idle_notification_handle_resumed,
};

bool seat_add_idle (struct Seat *seat, SCM proc, uint32_t ms)
{
	assert(context.idle_notifier != NULL);

struct Idle *idle = calloc(1, sizeof(struct Idle));
	if ( idle == NULL )
		return false;
	idle->ms = ms;
	idle->seat = seat;
	idle->handler = proc;

idle->idle_notification = ext_idle_notifier_v1_get_idle_notification(
		context.idle_notifier,
		idle->ms,
		seat->wl_seat
	);
	ext_idle_notification_v1_add_listener(
		idle->idle_notification,
		&idle_notification_listener,
		idle
	);

wl_list_insert(&seat->idles, &idle->link);

return true;
}

static void idle_destroy (struct Idle *idle)
{
	// TODO XXX how do we tell guile it is allowed to clean up the handler?
	//          maybe by entering guile mode one more time at exit?
	//          we could also define an 'exit handler
	if ( idle->idle_notification != NULL )
	{
		assert(idle->seat != NULL);
		ext_idle_notification_v1_destroy(idle->idle_notification);
	}
	else
	{
		assert(idle->seat == NULL);
	}
	free(idle);
}

struct Seat *seat_create (struct wl_seat *wl_seat, uint32_t name)
{
	struct Seat *seat = calloc(1, sizeof(struct Seat));
	if ( seat == NULL )
	{
		fprintf(stderr, "ERROR: calloc: %s\n", strerror(errno));
		return NULL;
	}

seat->name = name;
	seat->wl_seat = wl_seat;

wl_list_init(&seat->idles);

return seat;
}

void seat_destroy (struct Seat *seat)
{
	struct Idle *idle, *tmp_i;
	wl_list_for_each_safe(idle, tmp_i, &seat->idles, link)
	{
		wl_list_remove(&idle->link);
		idle_destroy(idle);
	}

assert(seat->wl_seat != NULL);
	wl_seat_destroy(seat->wl_seat);
	free(seat);
}

0707010000001C000081A400000000000000000000000165A4F7D200000225000000000000000000000000000000000000002100000000riverguile-0.1.0+git8/src/seat.h#ifndef RIVERGUILE_SEAT_H
#define RIVERGUILE_SEAT_H

#include <stdbool.h>
#include <wayland-client.h>
#include <libguile.h>

struct Seat
{
	struct wl_list link;
	struct wl_seat *wl_seat;
	uint32_t name;

struct wl_list idles;
};

struct Idle
{
	struct Seat *seat;
	struct wl_list link;
	struct ext_idle_notification_v1 *idle_notification;
	SCM handler;
	uint32_t ms;
};

struct Seat *seat_create (struct wl_seat *wl_seat, uint32_t name);
void seat_destroy (struct Seat *seat);
bool seat_add_idle (struct Seat *seat, SCM proc, uint32_t ms);

#endif
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!211 blocks

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