Start with tinywl
Add a config.h into which configurables can be moved.
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vendored
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dwl
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*-protocol.c
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*-protocol.h
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.ccls-cache
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LICENSE
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LICENSE
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dwl - dwm for Wayland
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Copyright © 2020 Devin J. Pohly
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|
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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----
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GNU GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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|
||||
finally terminates your license, and (b) permanently, if the copyright
|
||||
holder fails to notify you of the violation by some reasonable means
|
||||
prior to 60 days after the cessation.
|
||||
|
||||
Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Use with the GNU Affero General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU Affero General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the special requirements of the GNU Affero General Public License,
|
||||
section 13, concerning interaction through a network will apply to the
|
||||
combination as such.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
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,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
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>.
|
30
Makefile
Normal file
30
Makefile
Normal file
|
@ -0,0 +1,30 @@
|
|||
WAYLAND_PROTOCOLS=$(shell pkg-config --variable=pkgdatadir wayland-protocols)
|
||||
WAYLAND_SCANNER=$(shell pkg-config --variable=wayland_scanner wayland-scanner)
|
||||
LIBS=\
|
||||
$(shell pkg-config --cflags --libs wlroots) \
|
||||
$(shell pkg-config --cflags --libs wayland-server) \
|
||||
$(shell pkg-config --cflags --libs xkbcommon)
|
||||
|
||||
# wayland-scanner is a tool which generates C headers and rigging for Wayland
|
||||
# protocols, which are specified in XML. wlroots requires you to rig these up
|
||||
# to your build system yourself and provide them in the include path.
|
||||
xdg-shell-protocol.h:
|
||||
$(WAYLAND_SCANNER) server-header \
|
||||
$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
|
||||
|
||||
xdg-shell-protocol.c: xdg-shell-protocol.h
|
||||
$(WAYLAND_SCANNER) private-code \
|
||||
$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
|
||||
|
||||
dwl: dwl.c config.h xdg-shell-protocol.h xdg-shell-protocol.c
|
||||
$(CC) $(CFLAGS) \
|
||||
-g -Werror -I. \
|
||||
-DWLR_USE_UNSTABLE \
|
||||
-o $@ $< \
|
||||
$(LIBS)
|
||||
|
||||
clean:
|
||||
rm -f dwl xdg-shell-protocol.h xdg-shell-protocol.c
|
||||
|
||||
.DEFAULT_GOAL=dwl
|
||||
.PHONY: clean
|
50
README.md
Normal file
50
README.md
Normal file
|
@ -0,0 +1,50 @@
|
|||
# dwl
|
||||
|
||||
This is the "minimum viable product" Wayland compositor based on wlroots. It
|
||||
aims to implement a Wayland compositor in the fewest lines of code possible,
|
||||
while still supporting a reasonable set of features. Reading this code is the
|
||||
best starting point for anyone looking to build their own Wayland compositor
|
||||
based on wlroots.
|
||||
|
||||
|
||||
## Building dwl
|
||||
|
||||
dwl is disconnected from the main wlroots build system, in order to make it
|
||||
easier to understand the build requirements for your own Wayland compositors.
|
||||
Simply install the dependencies:
|
||||
|
||||
- wlroots
|
||||
- wayland-protocols
|
||||
|
||||
And run `make`.
|
||||
|
||||
|
||||
## Running dwl
|
||||
|
||||
You can run dwl with `./dwl`. In an existing Wayland or X11 session,
|
||||
dwl will open a Wayland or X11 window respectively to act as a virtual
|
||||
display. You can then open Wayland windows by setting `WAYLAND_DISPLAY` to the
|
||||
value shown in the logs. You can also run `./dwl` from a TTY.
|
||||
|
||||
In either case, you will likely want to specify `-s [cmd]` to run a command at
|
||||
startup, such as a terminal emulator. This will be necessary to start any new
|
||||
programs from within the compositor, as dwl does not support any custom
|
||||
keybindings. dwl supports the following keybindings:
|
||||
|
||||
- `Alt+Escape`: Terminate the compositor
|
||||
- `Alt+F1`: Cycle between windows
|
||||
|
||||
|
||||
## Limitations
|
||||
|
||||
Notable omissions from dwl:
|
||||
|
||||
- HiDPI support
|
||||
- Any kind of configuration, e.g. output layout
|
||||
- Any protocol other than xdg-shell (e.g. layer-shell, for
|
||||
panels/taskbars/etc; or Xwayland, for proxied X11 windows)
|
||||
- Optional protocols, e.g. screen capture, primary selection, virtual
|
||||
keyboard, etc. Most of these are plug-and-play with wlroots, but they're
|
||||
omitted for brevity.
|
||||
- Damage tracking, which tracks which parts of the screen are changing and
|
||||
minimizes redraws accordingly.
|
7
config.h
Normal file
7
config.h
Normal file
|
@ -0,0 +1,7 @@
|
|||
static const struct xkb_rule_names xkb_rules = {
|
||||
.rules = NULL,
|
||||
.model = NULL,
|
||||
.layout = "dvorak",
|
||||
.variant = NULL,
|
||||
.options = NULL,
|
||||
};
|
950
dwl.c
Normal file
950
dwl.c
Normal file
|
@ -0,0 +1,950 @@
|
|||
/*
|
||||
* See LICENSE file for copyright and license details.
|
||||
*/
|
||||
#define _POSIX_C_SOURCE 200112L
|
||||
#include <getopt.h>
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <time.h>
|
||||
#include <unistd.h>
|
||||
#include <wayland-server-core.h>
|
||||
#include <wlr/backend.h>
|
||||
#include <wlr/render/wlr_renderer.h>
|
||||
#include <wlr/types/wlr_cursor.h>
|
||||
#include <wlr/types/wlr_compositor.h>
|
||||
#include <wlr/types/wlr_data_device.h>
|
||||
#include <wlr/types/wlr_input_device.h>
|
||||
#include <wlr/types/wlr_keyboard.h>
|
||||
#include <wlr/types/wlr_matrix.h>
|
||||
#include <wlr/types/wlr_output.h>
|
||||
#include <wlr/types/wlr_output_layout.h>
|
||||
#include <wlr/types/wlr_pointer.h>
|
||||
#include <wlr/types/wlr_seat.h>
|
||||
#include <wlr/types/wlr_xcursor_manager.h>
|
||||
#include <wlr/types/wlr_xdg_shell.h>
|
||||
#include <wlr/util/log.h>
|
||||
#include <xkbcommon/xkbcommon.h>
|
||||
|
||||
/* For brevity's sake, struct members are annotated where they are used. */
|
||||
enum dwl_cursor_mode {
|
||||
DWL_CURSOR_PASSTHROUGH,
|
||||
DWL_CURSOR_MOVE,
|
||||
DWL_CURSOR_RESIZE,
|
||||
};
|
||||
|
||||
struct dwl_server {
|
||||
struct wl_display *wl_display;
|
||||
struct wlr_backend *backend;
|
||||
struct wlr_renderer *renderer;
|
||||
|
||||
struct wlr_xdg_shell *xdg_shell;
|
||||
struct wl_listener new_xdg_surface;
|
||||
struct wl_list views;
|
||||
|
||||
struct wlr_cursor *cursor;
|
||||
struct wlr_xcursor_manager *cursor_mgr;
|
||||
struct wl_listener cursor_motion;
|
||||
struct wl_listener cursor_motion_absolute;
|
||||
struct wl_listener cursor_button;
|
||||
struct wl_listener cursor_axis;
|
||||
struct wl_listener cursor_frame;
|
||||
|
||||
struct wlr_seat *seat;
|
||||
struct wl_listener new_input;
|
||||
struct wl_listener request_cursor;
|
||||
struct wl_list keyboards;
|
||||
enum dwl_cursor_mode cursor_mode;
|
||||
struct dwl_view *grabbed_view;
|
||||
double grab_x, grab_y;
|
||||
int grab_width, grab_height;
|
||||
uint32_t resize_edges;
|
||||
|
||||
struct wlr_output_layout *output_layout;
|
||||
struct wl_list outputs;
|
||||
struct wl_listener new_output;
|
||||
};
|
||||
|
||||
struct dwl_output {
|
||||
struct wl_list link;
|
||||
struct dwl_server *server;
|
||||
struct wlr_output *wlr_output;
|
||||
struct wl_listener frame;
|
||||
};
|
||||
|
||||
struct dwl_view {
|
||||
struct wl_list link;
|
||||
struct dwl_server *server;
|
||||
struct wlr_xdg_surface *xdg_surface;
|
||||
struct wl_listener map;
|
||||
struct wl_listener unmap;
|
||||
struct wl_listener destroy;
|
||||
struct wl_listener request_move;
|
||||
struct wl_listener request_resize;
|
||||
bool mapped;
|
||||
int x, y;
|
||||
};
|
||||
|
||||
struct dwl_keyboard {
|
||||
struct wl_list link;
|
||||
struct dwl_server *server;
|
||||
struct wlr_input_device *device;
|
||||
|
||||
struct wl_listener modifiers;
|
||||
struct wl_listener key;
|
||||
};
|
||||
|
||||
#include "config.h"
|
||||
|
||||
static void focus_view(struct dwl_view *view, struct wlr_surface *surface) {
|
||||
/* Note: this function only deals with keyboard focus. */
|
||||
if (view == NULL) {
|
||||
return;
|
||||
}
|
||||
struct dwl_server *server = view->server;
|
||||
struct wlr_seat *seat = server->seat;
|
||||
struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
|
||||
if (prev_surface == surface) {
|
||||
/* Don't re-focus an already focused surface. */
|
||||
return;
|
||||
}
|
||||
if (prev_surface) {
|
||||
/*
|
||||
* Deactivate the previously focused surface. This lets the client know
|
||||
* it no longer has focus and the client will repaint accordingly, e.g.
|
||||
* stop displaying a caret.
|
||||
*/
|
||||
struct wlr_xdg_surface *previous = wlr_xdg_surface_from_wlr_surface(
|
||||
seat->keyboard_state.focused_surface);
|
||||
wlr_xdg_toplevel_set_activated(previous, false);
|
||||
}
|
||||
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
|
||||
/* Move the view to the front */
|
||||
wl_list_remove(&view->link);
|
||||
wl_list_insert(&server->views, &view->link);
|
||||
/* Activate the new surface */
|
||||
wlr_xdg_toplevel_set_activated(view->xdg_surface, true);
|
||||
/*
|
||||
* Tell the seat to have the keyboard enter this surface. wlroots will keep
|
||||
* track of this and automatically send key events to the appropriate
|
||||
* clients without additional work on your part.
|
||||
*/
|
||||
wlr_seat_keyboard_notify_enter(seat, view->xdg_surface->surface,
|
||||
keyboard->keycodes, keyboard->num_keycodes, &keyboard->modifiers);
|
||||
}
|
||||
|
||||
static void keyboard_handle_modifiers(
|
||||
struct wl_listener *listener, void *data) {
|
||||
/* This event is raised when a modifier key, such as shift or alt, is
|
||||
* pressed. We simply communicate this to the client. */
|
||||
struct dwl_keyboard *keyboard =
|
||||
wl_container_of(listener, keyboard, modifiers);
|
||||
/*
|
||||
* A seat can only have one keyboard, but this is a limitation of the
|
||||
* Wayland protocol - not wlroots. We assign all connected keyboards to the
|
||||
* same seat. You can swap out the underlying wlr_keyboard like this and
|
||||
* wlr_seat handles this transparently.
|
||||
*/
|
||||
wlr_seat_set_keyboard(keyboard->server->seat, keyboard->device);
|
||||
/* Send modifiers to the client. */
|
||||
wlr_seat_keyboard_notify_modifiers(keyboard->server->seat,
|
||||
&keyboard->device->keyboard->modifiers);
|
||||
}
|
||||
|
||||
static bool handle_keybinding(struct dwl_server *server, xkb_keysym_t sym) {
|
||||
/*
|
||||
* Here we handle compositor keybindings. This is when the compositor is
|
||||
* processing keys, rather than passing them on to the client for its own
|
||||
* processing.
|
||||
*
|
||||
* This function assumes Alt is held down.
|
||||
*/
|
||||
switch (sym) {
|
||||
case XKB_KEY_Escape:
|
||||
wl_display_terminate(server->wl_display);
|
||||
break;
|
||||
case XKB_KEY_F1:
|
||||
/* Cycle to the next view */
|
||||
if (wl_list_length(&server->views) < 2) {
|
||||
break;
|
||||
}
|
||||
struct dwl_view *current_view = wl_container_of(
|
||||
server->views.next, current_view, link);
|
||||
struct dwl_view *next_view = wl_container_of(
|
||||
current_view->link.next, next_view, link);
|
||||
focus_view(next_view, next_view->xdg_surface->surface);
|
||||
/* Move the previous view to the end of the list */
|
||||
wl_list_remove(¤t_view->link);
|
||||
wl_list_insert(server->views.prev, ¤t_view->link);
|
||||
break;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static void keyboard_handle_key(
|
||||
struct wl_listener *listener, void *data) {
|
||||
/* This event is raised when a key is pressed or released. */
|
||||
struct dwl_keyboard *keyboard =
|
||||
wl_container_of(listener, keyboard, key);
|
||||
struct dwl_server *server = keyboard->server;
|
||||
struct wlr_event_keyboard_key *event = data;
|
||||
struct wlr_seat *seat = server->seat;
|
||||
|
||||
/* Translate libinput keycode -> xkbcommon */
|
||||
uint32_t keycode = event->keycode + 8;
|
||||
/* Get a list of keysyms based on the keymap for this keyboard */
|
||||
const xkb_keysym_t *syms;
|
||||
int nsyms = xkb_state_key_get_syms(
|
||||
keyboard->device->keyboard->xkb_state, keycode, &syms);
|
||||
|
||||
bool handled = false;
|
||||
uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
|
||||
if ((modifiers & WLR_MODIFIER_ALT) && event->state == WLR_KEY_PRESSED) {
|
||||
/* If alt is held down and this button was _pressed_, we attempt to
|
||||
* process it as a compositor keybinding. */
|
||||
for (int i = 0; i < nsyms; i++) {
|
||||
handled = handle_keybinding(server, syms[i]);
|
||||
}
|
||||
}
|
||||
|
||||
if (!handled) {
|
||||
/* Otherwise, we pass it along to the client. */
|
||||
wlr_seat_set_keyboard(seat, keyboard->device);
|
||||
wlr_seat_keyboard_notify_key(seat, event->time_msec,
|
||||
event->keycode, event->state);
|
||||
}
|
||||
}
|
||||
|
||||
static void server_new_keyboard(struct dwl_server *server,
|
||||
struct wlr_input_device *device) {
|
||||
struct dwl_keyboard *keyboard =
|
||||
calloc(1, sizeof(struct dwl_keyboard));
|
||||
keyboard->server = server;
|
||||
keyboard->device = device;
|
||||
|
||||
/* We need to prepare an XKB keymap and assign it to the keyboard. This
|
||||
* assumes the defaults (e.g. layout = "us"). */
|
||||
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
|
||||
struct xkb_keymap *keymap = xkb_map_new_from_names(context, &xkb_rules,
|
||||
XKB_KEYMAP_COMPILE_NO_FLAGS);
|
||||
|
||||
wlr_keyboard_set_keymap(device->keyboard, keymap);
|
||||
xkb_keymap_unref(keymap);
|
||||
xkb_context_unref(context);
|
||||
wlr_keyboard_set_repeat_info(device->keyboard, 25, 600);
|
||||
|
||||
/* Here we set up listeners for keyboard events. */
|
||||
keyboard->modifiers.notify = keyboard_handle_modifiers;
|
||||
wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers);
|
||||
keyboard->key.notify = keyboard_handle_key;
|
||||
wl_signal_add(&device->keyboard->events.key, &keyboard->key);
|
||||
|
||||
wlr_seat_set_keyboard(server->seat, device);
|
||||
|
||||
/* And add the keyboard to our list of keyboards */
|
||||
wl_list_insert(&server->keyboards, &keyboard->link);
|
||||
}
|
||||
|
||||
static void server_new_pointer(struct dwl_server *server,
|
||||
struct wlr_input_device *device) {
|
||||
/* We don't do anything special with pointers. All of our pointer handling
|
||||
* is proxied through wlr_cursor. On another compositor, you might take this
|
||||
* opportunity to do libinput configuration on the device to set
|
||||
* acceleration, etc. */
|
||||
wlr_cursor_attach_input_device(server->cursor, device);
|
||||
}
|
||||
|
||||
static void server_new_input(struct wl_listener *listener, void *data) {
|
||||
/* This event is raised by the backend when a new input device becomes
|
||||
* available. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, new_input);
|
||||
struct wlr_input_device *device = data;
|
||||
switch (device->type) {
|
||||
case WLR_INPUT_DEVICE_KEYBOARD:
|
||||
server_new_keyboard(server, device);
|
||||
break;
|
||||
case WLR_INPUT_DEVICE_POINTER:
|
||||
server_new_pointer(server, device);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
/* We need to let the wlr_seat know what our capabilities are, which is
|
||||
* communiciated to the client. In dwl we always have a cursor, even if
|
||||
* there are no pointer devices, so we always include that capability. */
|
||||
uint32_t caps = WL_SEAT_CAPABILITY_POINTER;
|
||||
if (!wl_list_empty(&server->keyboards)) {
|
||||
caps |= WL_SEAT_CAPABILITY_KEYBOARD;
|
||||
}
|
||||
wlr_seat_set_capabilities(server->seat, caps);
|
||||
}
|
||||
|
||||
static void seat_request_cursor(struct wl_listener *listener, void *data) {
|
||||
struct dwl_server *server = wl_container_of(
|
||||
listener, server, request_cursor);
|
||||
/* This event is rasied by the seat when a client provides a cursor image */
|
||||
struct wlr_seat_pointer_request_set_cursor_event *event = data;
|
||||
struct wlr_seat_client *focused_client =
|
||||
server->seat->pointer_state.focused_client;
|
||||
/* This can be sent by any client, so we check to make sure this one is
|
||||
* actually has pointer focus first. */
|
||||
if (focused_client == event->seat_client) {
|
||||
/* Once we've vetted the client, we can tell the cursor to use the
|
||||
* provided surface as the cursor image. It will set the hardware cursor
|
||||
* on the output that it's currently on and continue to do so as the
|
||||
* cursor moves between outputs. */
|
||||
wlr_cursor_set_surface(server->cursor, event->surface,
|
||||
event->hotspot_x, event->hotspot_y);
|
||||
}
|
||||
}
|
||||
|
||||
static bool view_at(struct dwl_view *view,
|
||||
double lx, double ly, struct wlr_surface **surface,
|
||||
double *sx, double *sy) {
|
||||
/*
|
||||
* XDG toplevels may have nested surfaces, such as popup windows for context
|
||||
* menus or tooltips. This function tests if any of those are underneath the
|
||||
* coordinates lx and ly (in output Layout Coordinates). If so, it sets the
|
||||
* surface pointer to that wlr_surface and the sx and sy coordinates to the
|
||||
* coordinates relative to that surface's top-left corner.
|
||||
*/
|
||||
double view_sx = lx - view->x;
|
||||
double view_sy = ly - view->y;
|
||||
|
||||
struct wlr_surface_state *state = &view->xdg_surface->surface->current;
|
||||
|
||||
double _sx, _sy;
|
||||
struct wlr_surface *_surface = NULL;
|
||||
_surface = wlr_xdg_surface_surface_at(
|
||||
view->xdg_surface, view_sx, view_sy, &_sx, &_sy);
|
||||
|
||||
if (_surface != NULL) {
|
||||
*sx = _sx;
|
||||
*sy = _sy;
|
||||
*surface = _surface;
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static struct dwl_view *desktop_view_at(
|
||||
struct dwl_server *server, double lx, double ly,
|
||||
struct wlr_surface **surface, double *sx, double *sy) {
|
||||
/* This iterates over all of our surfaces and attempts to find one under the
|
||||
* cursor. This relies on server->views being ordered from top-to-bottom. */
|
||||
struct dwl_view *view;
|
||||
wl_list_for_each(view, &server->views, link) {
|
||||
if (view_at(view, lx, ly, surface, sx, sy)) {
|
||||
return view;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void process_cursor_move(struct dwl_server *server, uint32_t time) {
|
||||
/* Move the grabbed view to the new position. */
|
||||
server->grabbed_view->x = server->cursor->x - server->grab_x;
|
||||
server->grabbed_view->y = server->cursor->y - server->grab_y;
|
||||
}
|
||||
|
||||
static void process_cursor_resize(struct dwl_server *server, uint32_t time) {
|
||||
/*
|
||||
* Resizing the grabbed view can be a little bit complicated, because we
|
||||
* could be resizing from any corner or edge. This not only resizes the view
|
||||
* on one or two axes, but can also move the view if you resize from the top
|
||||
* or left edges (or top-left corner).
|
||||
*
|
||||
* Note that I took some shortcuts here. In a more fleshed-out compositor,
|
||||
* you'd wait for the client to prepare a buffer at the new size, then
|
||||
* commit any movement that was prepared.
|
||||
*/
|
||||
struct dwl_view *view = server->grabbed_view;
|
||||
double dx = server->cursor->x - server->grab_x;
|
||||
double dy = server->cursor->y - server->grab_y;
|
||||
double x = view->x;
|
||||
double y = view->y;
|
||||
int width = server->grab_width;
|
||||
int height = server->grab_height;
|
||||
if (server->resize_edges & WLR_EDGE_TOP) {
|
||||
y = server->grab_y + dy;
|
||||
height -= dy;
|
||||
if (height < 1) {
|
||||
y += height;
|
||||
}
|
||||
} else if (server->resize_edges & WLR_EDGE_BOTTOM) {
|
||||
height += dy;
|
||||
}
|
||||
if (server->resize_edges & WLR_EDGE_LEFT) {
|
||||
x = server->grab_x + dx;
|
||||
width -= dx;
|
||||
if (width < 1) {
|
||||
x += width;
|
||||
}
|
||||
} else if (server->resize_edges & WLR_EDGE_RIGHT) {
|
||||
width += dx;
|
||||
}
|
||||
view->x = x;
|
||||
view->y = y;
|
||||
wlr_xdg_toplevel_set_size(view->xdg_surface, width, height);
|
||||
}
|
||||
|
||||
static void process_cursor_motion(struct dwl_server *server, uint32_t time) {
|
||||
/* If the mode is non-passthrough, delegate to those functions. */
|
||||
if (server->cursor_mode == DWL_CURSOR_MOVE) {
|
||||
process_cursor_move(server, time);
|
||||
return;
|
||||
} else if (server->cursor_mode == DWL_CURSOR_RESIZE) {
|
||||
process_cursor_resize(server, time);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Otherwise, find the view under the pointer and send the event along. */
|
||||
double sx, sy;
|
||||
struct wlr_seat *seat = server->seat;
|
||||
struct wlr_surface *surface = NULL;
|
||||
struct dwl_view *view = desktop_view_at(server,
|
||||
server->cursor->x, server->cursor->y, &surface, &sx, &sy);
|
||||
if (!view) {
|
||||
/* If there's no view under the cursor, set the cursor image to a
|
||||
* default. This is what makes the cursor image appear when you move it
|
||||
* around the screen, not over any views. */
|
||||
wlr_xcursor_manager_set_cursor_image(
|
||||
server->cursor_mgr, "left_ptr", server->cursor);
|
||||
}
|
||||
if (surface) {
|
||||
bool focus_changed = seat->pointer_state.focused_surface != surface;
|
||||
/*
|
||||
* "Enter" the surface if necessary. This lets the client know that the
|
||||
* cursor has entered one of its surfaces.
|
||||
*
|
||||
* Note that this gives the surface "pointer focus", which is distinct
|
||||
* from keyboard focus. You get pointer focus by moving the pointer over
|
||||
* a window.
|
||||
*/
|
||||
wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
|
||||
if (!focus_changed) {
|
||||
/* The enter event contains coordinates, so we only need to notify
|
||||
* on motion if the focus did not change. */
|
||||
wlr_seat_pointer_notify_motion(seat, time, sx, sy);
|
||||
}
|
||||
} else {
|
||||
/* Clear pointer focus so future button events and such are not sent to
|
||||
* the last client to have the cursor over it. */
|
||||
wlr_seat_pointer_clear_focus(seat);
|
||||
}
|
||||
}
|
||||
|
||||
static void server_cursor_motion(struct wl_listener *listener, void *data) {
|
||||
/* This event is forwarded by the cursor when a pointer emits a _relative_
|
||||
* pointer motion event (i.e. a delta) */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, cursor_motion);
|
||||
struct wlr_event_pointer_motion *event = data;
|
||||
/* The cursor doesn't move unless we tell it to. The cursor automatically
|
||||
* handles constraining the motion to the output layout, as well as any
|
||||
* special configuration applied for the specific input device which
|
||||
* generated the event. You can pass NULL for the device if you want to move
|
||||
* the cursor around without any input. */
|
||||
wlr_cursor_move(server->cursor, event->device,
|
||||
event->delta_x, event->delta_y);
|
||||
process_cursor_motion(server, event->time_msec);
|
||||
}
|
||||
|
||||
static void server_cursor_motion_absolute(
|
||||
struct wl_listener *listener, void *data) {
|
||||
/* This event is forwarded by the cursor when a pointer emits an _absolute_
|
||||
* motion event, from 0..1 on each axis. This happens, for example, when
|
||||
* wlroots is running under a Wayland window rather than KMS+DRM, and you
|
||||
* move the mouse over the window. You could enter the window from any edge,
|
||||
* so we have to warp the mouse there. There is also some hardware which
|
||||
* emits these events. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, cursor_motion_absolute);
|
||||
struct wlr_event_pointer_motion_absolute *event = data;
|
||||
wlr_cursor_warp_absolute(server->cursor, event->device, event->x, event->y);
|
||||
process_cursor_motion(server, event->time_msec);
|
||||
}
|
||||
|
||||
static void server_cursor_button(struct wl_listener *listener, void *data) {
|
||||
/* This event is forwarded by the cursor when a pointer emits a button
|
||||
* event. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, cursor_button);
|
||||
struct wlr_event_pointer_button *event = data;
|
||||
/* Notify the client with pointer focus that a button press has occurred */
|
||||
wlr_seat_pointer_notify_button(server->seat,
|
||||
event->time_msec, event->button, event->state);
|
||||
double sx, sy;
|
||||
struct wlr_seat *seat = server->seat;
|
||||
struct wlr_surface *surface;
|
||||
struct dwl_view *view = desktop_view_at(server,
|
||||
server->cursor->x, server->cursor->y, &surface, &sx, &sy);
|
||||
if (event->state == WLR_BUTTON_RELEASED) {
|
||||
/* If you released any buttons, we exit interactive move/resize mode. */
|
||||
server->cursor_mode = DWL_CURSOR_PASSTHROUGH;
|
||||
} else {
|
||||
/* Focus that client if the button was _pressed_ */
|
||||
focus_view(view, surface);
|
||||
}
|
||||
}
|
||||
|
||||
static void server_cursor_axis(struct wl_listener *listener, void *data) {
|
||||
/* This event is forwarded by the cursor when a pointer emits an axis event,
|
||||
* for example when you move the scroll wheel. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, cursor_axis);
|
||||
struct wlr_event_pointer_axis *event = data;
|
||||
/* Notify the client with pointer focus of the axis event. */
|
||||
wlr_seat_pointer_notify_axis(server->seat,
|
||||
event->time_msec, event->orientation, event->delta,
|
||||
event->delta_discrete, event->source);
|
||||
}
|
||||
|
||||
static void server_cursor_frame(struct wl_listener *listener, void *data) {
|
||||
/* This event is forwarded by the cursor when a pointer emits an frame
|
||||
* event. Frame events are sent after regular pointer events to group
|
||||
* multiple events together. For instance, two axis events may happen at the
|
||||
* same time, in which case a frame event won't be sent in between. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, cursor_frame);
|
||||
/* Notify the client with pointer focus of the frame event. */
|
||||
wlr_seat_pointer_notify_frame(server->seat);
|
||||
}
|
||||
|
||||
/* Used to move all of the data necessary to render a surface from the top-level
|
||||
* frame handler to the per-surface render function. */
|
||||
struct render_data {
|
||||
struct wlr_output *output;
|
||||
struct wlr_renderer *renderer;
|
||||
struct dwl_view *view;
|
||||
struct timespec *when;
|
||||
};
|
||||
|
||||
static void render_surface(struct wlr_surface *surface,
|
||||
int sx, int sy, void *data) {
|
||||
/* This function is called for every surface that needs to be rendered. */
|
||||
struct render_data *rdata = data;
|
||||
struct dwl_view *view = rdata->view;
|
||||
struct wlr_output *output = rdata->output;
|
||||
|
||||
/* We first obtain a wlr_texture, which is a GPU resource. wlroots
|
||||
* automatically handles negotiating these with the client. The underlying
|
||||
* resource could be an opaque handle passed from the client, or the client
|
||||
* could have sent a pixel buffer which we copied to the GPU, or a few other
|
||||
* means. You don't have to worry about this, wlroots takes care of it. */
|
||||
struct wlr_texture *texture = wlr_surface_get_texture(surface);
|
||||
if (texture == NULL) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* The view has a position in layout coordinates. If you have two displays,
|
||||
* one next to the other, both 1080p, a view on the rightmost display might
|
||||
* have layout coordinates of 2000,100. We need to translate that to
|
||||
* output-local coordinates, or (2000 - 1920). */
|
||||
double ox = 0, oy = 0;
|
||||
wlr_output_layout_output_coords(
|
||||
view->server->output_layout, output, &ox, &oy);
|
||||
ox += view->x + sx, oy += view->y + sy;
|
||||
|
||||
/* We also have to apply the scale factor for HiDPI outputs. This is only
|
||||
* part of the puzzle, dwl does not fully support HiDPI. */
|
||||
struct wlr_box box = {
|
||||
.x = ox * output->scale,
|
||||
.y = oy * output->scale,
|
||||
.width = surface->current.width * output->scale,
|
||||
.height = surface->current.height * output->scale,
|
||||
};
|
||||
|
||||
/*
|
||||
* Those familiar with OpenGL are also familiar with the role of matricies
|
||||
* in graphics programming. We need to prepare a matrix to render the view
|
||||
* with. wlr_matrix_project_box is a helper which takes a box with a desired
|
||||
* x, y coordinates, width and height, and an output geometry, then
|
||||
* prepares an orthographic projection and multiplies the necessary
|
||||
* transforms to produce a model-view-projection matrix.
|
||||
*
|
||||
* Naturally you can do this any way you like, for example to make a 3D
|
||||
* compositor.
|
||||
*/
|
||||
float matrix[9];
|
||||
enum wl_output_transform transform =
|
||||
wlr_output_transform_invert(surface->current.transform);
|
||||
wlr_matrix_project_box(matrix, &box, transform, 0,
|
||||
output->transform_matrix);
|
||||
|
||||
/* This takes our matrix, the texture, and an alpha, and performs the actual
|
||||
* rendering on the GPU. */
|
||||
wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1);
|
||||
|
||||
/* This lets the client know that we've displayed that frame and it can
|
||||
* prepare another one now if it likes. */
|
||||
wlr_surface_send_frame_done(surface, rdata->when);
|
||||
}
|
||||
|
||||
static void output_frame(struct wl_listener *listener, void *data) {
|
||||
/* This function is called every time an output is ready to display a frame,
|
||||
* generally at the output's refresh rate (e.g. 60Hz). */
|
||||
struct dwl_output *output =
|
||||
wl_container_of(listener, output, frame);
|
||||
struct wlr_renderer *renderer = output->server->renderer;
|
||||
|
||||
struct timespec now;
|
||||
clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
|
||||
/* wlr_output_attach_render makes the OpenGL context current. */
|
||||
if (!wlr_output_attach_render(output->wlr_output, NULL)) {
|
||||
return;
|
||||
}
|
||||
/* The "effective" resolution can change if you rotate your outputs. */
|
||||
int width, height;
|
||||
wlr_output_effective_resolution(output->wlr_output, &width, &height);
|
||||
/* Begin the renderer (calls glViewport and some other GL sanity checks) */
|
||||
wlr_renderer_begin(renderer, width, height);
|
||||
|
||||
float color[4] = {0.3, 0.3, 0.3, 1.0};
|
||||
wlr_renderer_clear(renderer, color);
|
||||
|
||||
/* Each subsequent window we render is rendered on top of the last. Because
|
||||
* our view list is ordered front-to-back, we iterate over it backwards. */
|
||||
struct dwl_view *view;
|
||||
wl_list_for_each_reverse(view, &output->server->views, link) {
|
||||
if (!view->mapped) {
|
||||
/* An unmapped view should not be rendered. */
|
||||
continue;
|
||||
}
|
||||
struct render_data rdata = {
|
||||
.output = output->wlr_output,
|
||||
.view = view,
|
||||
.renderer = renderer,
|
||||
.when = &now,
|
||||
};
|
||||
/* This calls our render_surface function for each surface among the
|
||||
* xdg_surface's toplevel and popups. */
|
||||
wlr_xdg_surface_for_each_surface(view->xdg_surface,
|
||||
render_surface, &rdata);
|
||||
}
|
||||
|
||||
/* Hardware cursors are rendered by the GPU on a separate plane, and can be
|
||||
* moved around without re-rendering what's beneath them - which is more
|
||||
* efficient. However, not all hardware supports hardware cursors. For this
|
||||
* reason, wlroots provides a software fallback, which we ask it to render
|
||||
* here. wlr_cursor handles configuring hardware vs software cursors for you,
|
||||
* and this function is a no-op when hardware cursors are in use. */
|
||||
wlr_output_render_software_cursors(output->wlr_output, NULL);
|
||||
|
||||
/* Conclude rendering and swap the buffers, showing the final frame
|
||||
* on-screen. */
|
||||
wlr_renderer_end(renderer);
|
||||
wlr_output_commit(output->wlr_output);
|
||||
}
|
||||
|
||||
static void server_new_output(struct wl_listener *listener, void *data) {
|
||||
/* This event is rasied by the backend when a new output (aka a display or
|
||||
* monitor) becomes available. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, new_output);
|
||||
struct wlr_output *wlr_output = data;
|
||||
|
||||
/* Some backends don't have modes. DRM+KMS does, and we need to set a mode
|
||||
* before we can use the output. The mode is a tuple of (width, height,
|
||||
* refresh rate), and each monitor supports only a specific set of modes. We
|
||||
* just pick the monitor's preferred mode, a more sophisticated compositor
|
||||
* would let the user configure it. */
|
||||
if (!wl_list_empty(&wlr_output->modes)) {
|
||||
struct wlr_output_mode *mode = wlr_output_preferred_mode(wlr_output);
|
||||
wlr_output_set_mode(wlr_output, mode);
|
||||
wlr_output_enable(wlr_output, true);
|
||||
if (!wlr_output_commit(wlr_output)) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* Allocates and configures our state for this output */
|
||||
struct dwl_output *output =
|
||||
calloc(1, sizeof(struct dwl_output));
|
||||
output->wlr_output = wlr_output;
|
||||
output->server = server;
|
||||
/* Sets up a listener for the frame notify event. */
|
||||
output->frame.notify = output_frame;
|
||||
wl_signal_add(&wlr_output->events.frame, &output->frame);
|
||||
wl_list_insert(&server->outputs, &output->link);
|
||||
|
||||
/* Adds this to the output layout. The add_auto function arranges outputs
|
||||
* from left-to-right in the order they appear. A more sophisticated
|
||||
* compositor would let the user configure the arrangement of outputs in the
|
||||
* layout. */
|
||||
wlr_output_layout_add_auto(server->output_layout, wlr_output);
|
||||
|
||||
/* Creating the global adds a wl_output global to the display, which Wayland
|
||||
* clients can see to find out information about the output (such as
|
||||
* DPI, scale factor, manufacturer, etc). */
|
||||
wlr_output_create_global(wlr_output);
|
||||
}
|
||||
|
||||
static void xdg_surface_map(struct wl_listener *listener, void *data) {
|
||||
/* Called when the surface is mapped, or ready to display on-screen. */
|
||||
struct dwl_view *view = wl_container_of(listener, view, map);
|
||||
view->mapped = true;
|
||||
focus_view(view, view->xdg_surface->surface);
|
||||
}
|
||||
|
||||
static void xdg_surface_unmap(struct wl_listener *listener, void *data) {
|
||||
/* Called when the surface is unmapped, and should no longer be shown. */
|
||||
struct dwl_view *view = wl_container_of(listener, view, unmap);
|
||||
view->mapped = false;
|
||||
}
|
||||
|
||||
static void xdg_surface_destroy(struct wl_listener *listener, void *data) {
|
||||
/* Called when the surface is destroyed and should never be shown again. */
|
||||
struct dwl_view *view = wl_container_of(listener, view, destroy);
|
||||
wl_list_remove(&view->link);
|
||||
free(view);
|
||||
}
|
||||
|
||||
static void begin_interactive(struct dwl_view *view,
|
||||
enum dwl_cursor_mode mode, uint32_t edges) {
|
||||
/* This function sets up an interactive move or resize operation, where the
|
||||
* compositor stops propegating pointer events to clients and instead
|
||||
* consumes them itself, to move or resize windows. */
|
||||
struct dwl_server *server = view->server;
|
||||
struct wlr_surface *focused_surface =
|
||||
server->seat->pointer_state.focused_surface;
|
||||
if (view->xdg_surface->surface != focused_surface) {
|
||||
/* Deny move/resize requests from unfocused clients. */
|
||||
return;
|
||||
}
|
||||
server->grabbed_view = view;
|
||||
server->cursor_mode = mode;
|
||||
struct wlr_box geo_box;
|
||||
wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box);
|
||||
if (mode == DWL_CURSOR_MOVE) {
|
||||
server->grab_x = server->cursor->x - view->x;
|
||||
server->grab_y = server->cursor->y - view->y;
|
||||
} else {
|
||||
server->grab_x = server->cursor->x + geo_box.x;
|
||||
server->grab_y = server->cursor->y + geo_box.y;
|
||||
}
|
||||
server->grab_width = geo_box.width;
|
||||
server->grab_height = geo_box.height;
|
||||
server->resize_edges = edges;
|
||||
}
|
||||
|
||||
static void xdg_toplevel_request_move(
|
||||
struct wl_listener *listener, void *data) {
|
||||
/* This event is raised when a client would like to begin an interactive
|
||||
* move, typically because the user clicked on their client-side
|
||||
* decorations. Note that a more sophisticated compositor should check the
|
||||
* provied serial against a list of button press serials sent to this
|
||||
* client, to prevent the client from requesting this whenever they want. */
|
||||
struct dwl_view *view = wl_container_of(listener, view, request_move);
|
||||
begin_interactive(view, DWL_CURSOR_MOVE, 0);
|
||||
}
|
||||
|
||||
static void xdg_toplevel_request_resize(
|
||||
struct wl_listener *listener, void *data) {
|
||||
/* This event is raised when a client would like to begin an interactive
|
||||
* resize, typically because the user clicked on their client-side
|
||||
* decorations. Note that a more sophisticated compositor should check the
|
||||
* provied serial against a list of button press serials sent to this
|
||||
* client, to prevent the client from requesting this whenever they want. */
|
||||
struct wlr_xdg_toplevel_resize_event *event = data;
|
||||
struct dwl_view *view = wl_container_of(listener, view, request_resize);
|
||||
begin_interactive(view, DWL_CURSOR_RESIZE, event->edges);
|
||||
}
|
||||
|
||||
static void server_new_xdg_surface(struct wl_listener *listener, void *data) {
|
||||
/* This event is raised when wlr_xdg_shell receives a new xdg surface from a
|
||||
* client, either a toplevel (application window) or popup. */
|
||||
struct dwl_server *server =
|
||||
wl_container_of(listener, server, new_xdg_surface);
|
||||
struct wlr_xdg_surface *xdg_surface = data;
|
||||
if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Allocate a dwl_view for this surface */
|
||||
struct dwl_view *view =
|
||||
calloc(1, sizeof(struct dwl_view));
|
||||
view->server = server;
|
||||
view->xdg_surface = xdg_surface;
|
||||
|
||||
/* Listen to the various events it can emit */
|
||||
view->map.notify = xdg_surface_map;
|
||||
wl_signal_add(&xdg_surface->events.map, &view->map);
|
||||
view->unmap.notify = xdg_surface_unmap;
|
||||
wl_signal_add(&xdg_surface->events.unmap, &view->unmap);
|
||||
view->destroy.notify = xdg_surface_destroy;
|
||||
wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
|
||||
|
||||
/* cotd */
|
||||
struct wlr_xdg_toplevel *toplevel = xdg_surface->toplevel;
|
||||
view->request_move.notify = xdg_toplevel_request_move;
|
||||
wl_signal_add(&toplevel->events.request_move, &view->request_move);
|
||||
view->request_resize.notify = xdg_toplevel_request_resize;
|
||||
wl_signal_add(&toplevel->events.request_resize, &view->request_resize);
|
||||
|
||||
/* Add it to the list of views. */
|
||||
wl_list_insert(&server->views, &view->link);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[]) {
|
||||
wlr_log_init(WLR_DEBUG, NULL);
|
||||
char *startup_cmd = NULL;
|
||||
|
||||
int c;
|
||||
while ((c = getopt(argc, argv, "s:h")) != -1) {
|
||||
switch (c) {
|
||||
case 's':
|
||||
startup_cmd = optarg;
|
||||
break;
|
||||
default:
|
||||
printf("Usage: %s [-s startup command]\n", argv[0]);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
if (optind < argc) {
|
||||
printf("Usage: %s [-s startup command]\n", argv[0]);
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct dwl_server server;
|
||||
/* The Wayland display is managed by libwayland. It handles accepting
|
||||
* clients from the Unix socket, manging Wayland globals, and so on. */
|
||||
server.wl_display = wl_display_create();
|
||||
/* The backend is a wlroots feature which abstracts the underlying input and
|
||||
* output hardware. The autocreate option will choose the most suitable
|
||||
* backend based on the current environment, such as opening an X11 window
|
||||
* if an X11 server is running. The NULL argument here optionally allows you
|
||||
* to pass in a custom renderer if wlr_renderer doesn't meet your needs. The
|
||||
* backend uses the renderer, for example, to fall back to software cursors
|
||||
* if the backend does not support hardware cursors (some older GPUs
|
||||
* don't). */
|
||||
server.backend = wlr_backend_autocreate(server.wl_display, NULL);
|
||||
|
||||
/* If we don't provide a renderer, autocreate makes a GLES2 renderer for us.
|
||||
* The renderer is responsible for defining the various pixel formats it
|
||||
* supports for shared memory, this configures that for clients. */
|
||||
server.renderer = wlr_backend_get_renderer(server.backend);
|
||||
wlr_renderer_init_wl_display(server.renderer, server.wl_display);
|
||||
|
||||
/* This creates some hands-off wlroots interfaces. The compositor is
|
||||
* necessary for clients to allocate surfaces and the data device manager
|
||||
* handles the clipboard. Each of these wlroots interfaces has room for you
|
||||
* to dig your fingers in and play with their behavior if you want. */
|
||||
wlr_compositor_create(server.wl_display, server.renderer);
|
||||
wlr_data_device_manager_create(server.wl_display);
|
||||
|
||||
/* Creates an output layout, which a wlroots utility for working with an
|
||||
* arrangement of screens in a physical layout. */
|
||||
server.output_layout = wlr_output_layout_create();
|
||||
|
||||
/* Configure a listener to be notified when new outputs are available on the
|
||||
* backend. */
|
||||
wl_list_init(&server.outputs);
|
||||
server.new_output.notify = server_new_output;
|
||||
wl_signal_add(&server.backend->events.new_output, &server.new_output);
|
||||
|
||||
/* Set up our list of views and the xdg-shell. The xdg-shell is a Wayland
|
||||
* protocol which is used for application windows. For more detail on
|
||||
* shells, refer to my article:
|
||||
*
|
||||
* https://drewdevault.com/2018/07/29/Wayland-shells.html
|
||||
*/
|
||||
wl_list_init(&server.views);
|
||||
server.xdg_shell = wlr_xdg_shell_create(server.wl_display);
|
||||
server.new_xdg_surface.notify = server_new_xdg_surface;
|
||||
wl_signal_add(&server.xdg_shell->events.new_surface,
|
||||
&server.new_xdg_surface);
|
||||
|
||||
/*
|
||||
* Creates a cursor, which is a wlroots utility for tracking the cursor
|
||||
* image shown on screen.
|
||||
*/
|
||||
server.cursor = wlr_cursor_create();
|
||||
wlr_cursor_attach_output_layout(server.cursor, server.output_layout);
|
||||
|
||||
/* Creates an xcursor manager, another wlroots utility which loads up
|
||||
* Xcursor themes to source cursor images from and makes sure that cursor
|
||||
* images are available at all scale factors on the screen (necessary for
|
||||
* HiDPI support). We add a cursor theme at scale factor 1 to begin with. */
|
||||
server.cursor_mgr = wlr_xcursor_manager_create(NULL, 24);
|
||||
wlr_xcursor_manager_load(server.cursor_mgr, 1);
|
||||
|
||||
/*
|
||||
* wlr_cursor *only* displays an image on screen. It does not move around
|
||||
* when the pointer moves. However, we can attach input devices to it, and
|
||||
* it will generate aggregate events for all of them. In these events, we
|
||||
* can choose how we want to process them, forwarding them to clients and
|
||||
* moving the cursor around. More detail on this process is described in my
|
||||
* input handling blog post:
|
||||
*
|
||||
* https://drewdevault.com/2018/07/17/Input-handling-in-wlroots.html
|
||||
*
|
||||
* And more comments are sprinkled throughout the notify functions above.
|
||||
*/
|
||||
server.cursor_motion.notify = server_cursor_motion;
|
||||
wl_signal_add(&server.cursor->events.motion, &server.cursor_motion);
|
||||
server.cursor_motion_absolute.notify = server_cursor_motion_absolute;
|
||||
wl_signal_add(&server.cursor->events.motion_absolute,
|
||||
&server.cursor_motion_absolute);
|
||||
server.cursor_button.notify = server_cursor_button;
|
||||
wl_signal_add(&server.cursor->events.button, &server.cursor_button);
|
||||
server.cursor_axis.notify = server_cursor_axis;
|
||||
wl_signal_add(&server.cursor->events.axis, &server.cursor_axis);
|
||||
server.cursor_frame.notify = server_cursor_frame;
|
||||
wl_signal_add(&server.cursor->events.frame, &server.cursor_frame);
|
||||
|
||||
/*
|
||||
* Configures a seat, which is a single "seat" at which a user sits and
|
||||
* operates the computer. This conceptually includes up to one keyboard,
|
||||
* pointer, touch, and drawing tablet device. We also rig up a listener to
|
||||
* let us know when new input devices are available on the backend.
|
||||
*/
|
||||
wl_list_init(&server.keyboards);
|
||||
server.new_input.notify = server_new_input;
|
||||
wl_signal_add(&server.backend->events.new_input, &server.new_input);
|
||||
server.seat = wlr_seat_create(server.wl_display, "seat0");
|
||||
server.request_cursor.notify = seat_request_cursor;
|
||||
wl_signal_add(&server.seat->events.request_set_cursor,
|
||||
&server.request_cursor);
|
||||
|
||||
/* Add a Unix socket to the Wayland display. */
|
||||
const char *socket = wl_display_add_socket_auto(server.wl_display);
|
||||
if (!socket) {
|
||||
wlr_backend_destroy(server.backend);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Start the backend. This will enumerate outputs and inputs, become the DRM
|
||||
* master, etc */
|
||||
if (!wlr_backend_start(server.backend)) {
|
||||
wlr_backend_destroy(server.backend);
|
||||
wl_display_destroy(server.wl_display);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Set the WAYLAND_DISPLAY environment variable to our socket and run the
|
||||
* startup command if requested. */
|
||||
setenv("WAYLAND_DISPLAY", socket, true);
|
||||
if (startup_cmd) {
|
||||
if (fork() == 0) {
|
||||
execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
|
||||
}
|
||||
}
|
||||
/* Run the Wayland event loop. This does not return until you exit the
|
||||
* compositor. Starting the backend rigged up all of the necessary event
|
||||
* loop configuration to listen to libinput events, DRM events, generate
|
||||
* frame events at the refresh rate, and so on. */
|
||||
wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
|
||||
socket);
|
||||
wl_display_run(server.wl_display);
|
||||
|
||||
/* Once wl_display_run returns, we shut down the server. */
|
||||
wl_display_destroy_clients(server.wl_display);
|
||||
wl_display_destroy(server.wl_display);
|
||||
return 0;
|
||||
}
|
Loading…
Reference in a new issue