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*~
*\#*
*.o
*-client-protocol.h
include/config.h
.gdb_history
*.log
wvkbd

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[submodule "wld"]
path = wld
url = https://github.com/michaelforney/wld.git

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Copyright © 2020 John Sullivan <jsullivan@csumb.edu>
os-compatibility.h and os-compatibility.c are licensed by the Wayland project
under the MIT/X license. See more details in COPYING_WESTON.
wld submodule is licensed by Michael Forney under the MIT license, see COPYING
in `wld/`.
All other code in this repository falls under the terms of the GPL v3.0 license,
which can be found in LICENSE.

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Copyright © 2008-2012 Kristian Høgsberg
Copyright © 2010-2012 Intel Corporation
Copyright © 2010-2011 Benjamin Franzke
Copyright © 2011-2012 Collabora, Ltd.
Copyright © 2010 Red Hat <mjg@redhat.com>
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
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DEALINGS IN THE SOFTWARE.
---
The above is the version of the MIT "Expat" License used by X.org:
http://cgit.freedesktop.org/xorg/xserver/tree/COPYING

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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>.

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include config.mk
SRC=.
WLDSRC=wld
PKGS = fontconfig wayland-client xkbcommon pixman-1
WVKBD_SOURCES += $(wildcard $(SRC)/*.c)
WVKBD_HEADERS += $(wildcard $(SRC)/*.h)
CFLAGS += -std=gnu99 -Wall -g -DWITH_WAYLAND_SHM
CFLAGS += $(shell pkg-config --cflags $(PKGS))
LDFLAGS =wld/libwld.a $(shell pkg-config --libs $(PKGS)) -lm -lutil
WAYLAND_HEADERS = $(wildcard proto/*.xml)
HDRS = $(WAYLAND_HEADERS:.xml=-client-protocol.h)
WAYLAND_SRC = $(HDRS:.h=.c)
SOURCES = $(WVKBD_SOURCES) $(WAYLAND_SRC)
OBJECTS = $(SOURCES:.c=.o)
all: wld wvkbd
proto/%-client-protocol.c: proto/%.xml
wayland-scanner code < $? > $@
proto/%-client-protocol.h: proto/%.xml
wayland-scanner client-header < $? > $@
$(OBJECTS): $(HDRS) $(WVKBD_HEADERS)
wvkbd: $(OBJECTS)
$(CC) -o wvkbd $(OBJECTS) $(LDFLAGS)
wld: wld/libwld.a
wld/libwld.a:
$(MAKE) -C wld ENABLE_DRM=0
clean:
rm -f $(OBJECTS) $(HDRS) $(WAYLAND_SRC) wvkbd
$(MAKE) -C wld clean
format:
clang-format -i $(WVKBD_SOURCES) $(WVKBD_HEADERS)

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# wvkbd - On-screen keyboard for wlroots that sucks less
<img src="https://raw.githubusercontent.com/jjsullivan5196/wvkbd/master/contrib/grab.png" width=350 />
This project aims to deliver a minimum implementation of a wlroots on-screen
keyboard in legible C. This will **only** be a keyboard, not a feedback buzzer,
led blinker, or anything that requires more than what's needed to input text
quickly. The end product should be a static codebase that can be patched to add
new features.
At the moment work still needs to be done to make the keyboard fully functional
and determine a minimum feature set. As of now, the following works:
## Features
- Typing, modifier locking, layout switching
- Positive visual feedback on key presses
- Custom layouts
- Custom color schemes
There are some relatively critical areas that still need work:
- Proper drawing of font glyphs/fontconfig alternatives (unknown glyphs for the
configured font are not drawn)
- Make sure the virtual input method in wayland is working as best as it can
- Customize keyboard window docking
- Nicer layout drawing/padding
- Determine if some dependencies are really needed (fontconfig is VERY
annoying, and wld may not be strictly necessary)
And some nice to haves:
- Daemon mode (hide/show keyboard on signals)
- Support for input method protocol in wayland, ability to respond to text
fields
- Alt input modes for things like emojis
- Typical international layouts in the repository
Of course there's probably some more I'm forgetting, everything here is very
much early WIP so things will change very quickly.
## Install
You'll need the following developer packages
- fontconfig
- wayland-client
- xkbcommon
- pixman
After cloning this repo, run `git submodules update --init --recursive`
Make any customizations you would like in `config.h` and run `make`, then `./wvkbd`
## Contribute
Any contributions are welcome, please tell me what I did wrong in issues or
PRs. I could also use some nice branding if that tickles your fancy.
For code contributions, all I ask for now is you run `make format` (requires
`clang-format`) before opening a PR and include as much relevant detail as
possible.

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/* constants */
/* how tall the keyboard should be */
#define KBD_PIXEL_HEIGHT 155
/* if your layout leaves an empty margin, increase this to fix it */
#define KBD_PIXEL_OVERSCAN_WIDTH 0
/* rows for each layout */
#define KBD_ROWS 4
/* columns for each layout (maximum keys per row) */
#define KBD_COLS 10
/* spacing between keys */
#define KBD_KEY_BORDER 1
#include "keyboard.h"
/* font (see `man fonts-conf` for instructions) */
static const char *fc_font_pattern =
"monospace:size=14:antialias=true:hinting=true";
/* layout declarations */
enum layout_names {
Basic = 0,
Special,
NumLayouts,
};
static struct key keys_basic[], keys_special[];
static struct layout layouts[NumLayouts] = {
[Basic] = {keys_basic},
[Special] = {keys_special},
};
/* keyboard settings */
static struct kbd keyboard = {
/* default layout */
.layout = &layouts[Basic],
.scheme =
{
/* colors */
.bg = {.bgra = {15, 15, 15, 225}},
.fg = {.bgra = {45, 45, 45, 225}},
.high = {.bgra = {100, 100, 100, 225}},
.text = {.color = UINT32_MAX},
},
};
/* key layouts
*
* define keys like:
*
* `{
* "label",
* "SHIFT_LABEL",
* 1,
* [Code, Mod, Layout, Last],
* [KEY_CODE, Modifier],
* [&layout]
* },`
*
* - label: normal label for key
*
* - shift_label: label for key in shifted (uppercase) layout
*
* - width: column width of key
*
* - type: what kind of action this key peforms (emit keycode, toggle modifier,
* switch layout, or end the layout)
*
* - code: key scancode or modifier name (see
* `/usr/include/linux/input-event-codes.h` for scancode names, and
* `keyboard.h` for modifiers)
*
* - layout: layout to switch to when key is pressed
*/
static struct key keys_basic[] = {
{"q", "Q", 1, Code, KEY_Q},
{"w", "W", 1, Code, KEY_W},
{"e", "E", 1, Code, KEY_E},
{"r", "R", 1, Code, KEY_R},
{"t", "T", 1, Code, KEY_T},
{"y", "Y", 1, Code, KEY_Y},
{"u", "U", 1, Code, KEY_U},
{"i", "I", 1, Code, KEY_I},
{"o", "O", 1, Code, KEY_O},
{"p", "P", 1, Code, KEY_P},
{"a", "A", 1, Code, KEY_A},
{"s", "S", 1, Code, KEY_S},
{"d", "D", 1, Code, KEY_D},
{"f", "F", 1, Code, KEY_F},
{"g", "G", 1, Code, KEY_G},
{"h", "H", 1, Code, KEY_H},
{"j", "J", 1, Code, KEY_J},
{"k", "K", 1, Code, KEY_K},
{"l", "L", 1, Code, KEY_L},
{";", ":", 1, Code, KEY_SEMICOLON},
{"z", "Z", 1, Code, KEY_Z},
{"x", "X", 1, Code, KEY_X},
{"c", "C", 1, Code, KEY_C},
{"v", "V", 1, Code, KEY_V},
{"b", "B", 1, Code, KEY_B},
{"n", "N", 1, Code, KEY_N},
{"m", "M", 1, Code, KEY_M},
{"Tab", "Tab", 1, Code, KEY_TAB},
{"Bk", "Bk", 1, Code, KEY_BACKSPACE},
{"Ret", "Ret", 1, Code, KEY_ENTER},
{"Sft", "Sft", 1, Mod, Shift},
{"Sp", "Sp", 1, Mod, Super},
{"Alt", "Alt", 1, Mod, AltGr},
{"", "", 3, Code, KEY_SPACE},
{"Esc", "Esc", 1, Code, KEY_ESC},
{"Ctl", "Ctl", 1, Mod, Ctrl},
{"Sm", "Sm", 2, Layout, 0, &layouts[Special]},
/* end of layout */
{"", "", 0, Last},
};
static struct key keys_special[] = {
{"1", "!", 1, Code, KEY_1},
{"2", "@", 1, Code, KEY_2},
{"3", "#", 1, Code, KEY_3},
{"4", "$", 1, Code, KEY_4},
{"5", "%", 1, Code, KEY_5},
{"6", "^", 1, Code, KEY_6},
{"7", "&", 1, Code, KEY_7},
{"8", "*", 1, Code, KEY_8},
{"9", "(", 1, Code, KEY_9},
{"0", ")", 1, Code, KEY_0},
{"'", "\"", 1, Code, KEY_APOSTROPHE},
{"`", "~", 1, Code, KEY_GRAVE},
{"-", "_", 1, Code, KEY_MINUS},
{"=", "+", 1, Code, KEY_EQUAL},
{"[", "{", 1, Code, KEY_LEFTBRACE},
{"]", "}", 1, Code, KEY_RIGHTBRACE},
{",", "<", 1, Code, KEY_COMMA},
{".", ">", 1, Code, KEY_DOT},
{"/", "?", 1, Code, KEY_SLASH},
{"\\", "|", 1, Code, KEY_BACKSLASH},
{"↑", "↑", 1, Code, KEY_UP},
{"↓", "↓", 1, Code, KEY_DOWN},
{"←", "←", 1, Code, KEY_LEFT},
{"→", "→", 1, Code, KEY_RIGHT},
{"Sp", "Sp", 1, Mod, Super},
{"Alt", "Alt", 1, Mod, AltGr},
{"Ctl", "Ctl", 1, Mod, Ctrl},
{"Sft", "Sft", 1, Mod, Shift},
{"Ret", "Ret", 1, Code, KEY_ENTER},
{"Bk", "Bk", 1, Code, KEY_BACKSPACE},
{"", "", 3, Code, KEY_SPACE},
{"Bsc", "Bsc", 2, Layout, 0, &layouts[Basic]},
/* end of layout */
{"", "", 0, Last},
};

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VERSION = 0.0.1
CFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=700

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#include "wld/wayland.h"
#include "wld/wld.h"
#include <wayland-client.h>
#include "drw.h"
void
drw_init(struct drw *d, const char *fc_pattern, struct wl_display *dpy,
void *iface) {
d->wld = wld_wayland_create_context(dpy, WLD_ANY, iface);
d->fctx = wld_font_create_context();
d->font = wld_font_open_name(d->fctx, fc_pattern);
}
void
drwsurf_init(struct drw *d, struct drwsurf *ds, struct wl_surface *surf) {
ds->ctx = d;
ds->surf = surf;
ds->render = wld_create_renderer(d->wld);
}
void
drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h) {
union wld_object obj;
if (ds->buf) {
wld_buffer_unreference(ds->buf);
ds->buf = NULL;
ds->ref = NULL;
}
ds->w = w;
ds->h = h;
ds->buf = wld_create_buffer(ds->ctx->wld, w, h, WLD_FORMAT_ARGB8888, 0);
wld_set_target_buffer(ds->render, ds->buf);
wld_export(ds->buf, WLD_WAYLAND_OBJECT_BUFFER, &obj);
ds->ref = obj.ptr;
}
static void surface_frame_callback(void *data, struct wl_callback *cb,
uint32_t time);
static struct wl_callback_listener frame_listener = {.done =
surface_frame_callback};
void
drwsurf_flip(struct drwsurf *ds) {
ds->cb = wl_surface_frame(ds->surf);
wl_callback_add_listener(ds->cb, &frame_listener, (void *)ds);
if (ds->dirty) {
wl_surface_damage(ds->surf, 0, 0, ds->w, ds->h);
wld_flush(ds->render);
wld_set_target_buffer(ds->render, ds->buf);
ds->dirty = false;
}
wl_surface_attach(ds->surf, ds->ref, 0, 0);
wl_surface_commit(ds->surf);
}
void
surface_frame_callback(void *data, struct wl_callback *cb, uint32_t time) {
struct drwsurf *ds = (struct drwsurf *)data;
wl_callback_destroy(cb);
ds->cb = NULL;
drwsurf_flip(ds);
}

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#ifndef __DRW_H
#define __DRW_H
struct drw;
struct drwsurf;
void drw_init(struct drw *d, const char *fc_pattern, struct wl_display *dpy,
void *iface);
void drwsurf_init(struct drw *d, struct drwsurf *ds, struct wl_surface *surf);
void drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h);
void drwsurf_flip(struct drwsurf *ds);
struct drw {
struct wld_context *wld;
struct wld_font_context *fctx;
struct wld_font *font;
};
struct drwsurf {
uint32_t w, h;
bool dirty;
struct drw *ctx;
struct wl_surface *surf;
struct wld_renderer *render;
struct wld_buffer *buf;
struct wl_buffer *ref;
struct wl_callback *cb;
};
typedef union {
uint8_t bgra[4];
uint32_t color;
} Color;
#endif

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/* clang-format off */
#define KBD_POINTS KBD_ROWS * KBD_COLS
/* clang-format on */
enum key_type;
enum key_modifier_type;
struct clr_scheme;
struct key;
struct layout;
struct kbd;
enum key_type {
Pad = 0,
Code,
Mod,
Layout,
Last,
};
/* Modifiers passed to the virtual_keyboard protocol. They are based on
* wayland's wl_keyboard, which doesn't document them.
*/
enum key_modifier_type {
NoMod = 0,
Shift = 1,
CapsLock = 2,
Ctrl = 4,
Super = 64,
AltGr = 128,
};
struct clr_scheme {
Color fg;
Color bg;
Color high;
Color text;
};
struct key {
const char *label;
const char *shift_label;
const uint8_t width;
const enum key_type type;
const uint32_t code;
struct layout *layout;
uint8_t col, row;
};
struct layout {
struct key *keys;
struct key *gridpoints[KBD_POINTS];
};
struct kbd {
struct layout *layout;
struct clr_scheme scheme;
uint32_t w, h;
uint32_t kw, kh;
uint8_t mods;
struct key *last_press;
struct drwsurf *surf;
struct zwp_virtual_keyboard_v1 *vkbd;
};
static inline void draw_inset(struct drwsurf *d, uint32_t x, uint32_t y,
uint32_t width, uint32_t height, uint32_t border,
uint32_t color);
static void kbd_init_layout(struct layout *l);
static struct key *kbd_get_key(struct kbd *kb, uint32_t x, uint32_t y);
static void kbd_unpress_key(struct kbd *kb, uint32_t time);
static void kbd_press_key(struct kbd *kb, struct key *k, uint32_t time);
static void kbd_draw_key(struct kbd *kb, struct key *k, bool pressed);
static void kbd_draw_key(struct kbd *kb, struct key *k, bool pressed);
static void kbd_draw_layout(struct kbd *kb);
static void kbd_resize(struct kbd *kb, uint32_t w, uint32_t h);
void
kbd_init_layout(struct layout *l) {
uint8_t i = 0, width = 0, ncol = 0, col = 0, row = 0;
struct key *k = l->keys;
struct key **point = l->gridpoints,
**end_point = l->gridpoints + (KBD_POINTS);
memset(point, 0, sizeof(uint8_t) * KBD_POINTS);
while ((k->type != Last) && (point < end_point)) {
width = k->width;
ncol = col + width;
if (ncol > KBD_COLS) {
width = KBD_COLS - col;
col = 0;
row += 1;
for (i = 0; (i < width) && (point < end_point); i++, point++) {
}
continue;
}
k->col = col;
k->row = row;
col = ncol;
for (i = 0; (i < width) && (point < end_point); i++, point++) {
*point = k;
}
k++;
}
}
struct key *
kbd_get_key(struct kbd *kb, uint32_t x, uint32_t y) {
struct layout *l = kb->layout;
uint32_t col = KBD_COLS * ((float)x / (float)kb->w);
uint32_t row = KBD_ROWS * ((float)y / (float)kb->h);
return l->gridpoints[(row * KBD_COLS) + col];
}
void
kbd_unpress_key(struct kbd *kb, uint32_t time) {
if (kb->last_press) {
kbd_draw_key(kb, kb->last_press, false);
kb->surf->dirty = true;
zwp_virtual_keyboard_v1_key(kb->vkbd, time, kb->last_press->code,
WL_KEYBOARD_KEY_STATE_RELEASED);
kb->last_press = NULL;
}
}
void
kbd_press_key(struct kbd *kb, struct key *k, uint32_t time) {
switch (k->type) {
case Code:
kb->last_press = k;
kbd_draw_key(kb, k, true);
zwp_virtual_keyboard_v1_key(kb->vkbd, time, kb->last_press->code,
WL_KEYBOARD_KEY_STATE_PRESSED);
break;
case Mod:
kb->mods ^= k->code;
if (k->code == Shift) {
kbd_draw_layout(kb);
}
kbd_draw_key(kb, k, kb->mods & k->code);
zwp_virtual_keyboard_v1_modifiers(kb->vkbd, kb->mods, 0, 0, 0);
break;
case Layout:
kb->layout = k->layout;
kbd_draw_layout(kb);
default:
break;
}
kb->surf->dirty = true;
}
void
kbd_draw_key(struct kbd *kb, struct key *k, bool pressed) {
struct drwsurf *d = kb->surf;
const char *label = (kb->mods & Shift) ? k->shift_label : k->label;
Color *fill = pressed ? &kb->scheme.high : &kb->scheme.fg;
uint32_t x = k->col * kb->kw, y = k->row * kb->kh, width = k->width * kb->kw;
draw_inset(d, x, y, width, kb->kh, KBD_KEY_BORDER, fill->color);
wld_draw_text(d->render, d->ctx->font, kb->scheme.text.color,
x + (width * 0.35), y + (kb->kh / 2), label, -1, NULL);
}
void
kbd_draw_layout(struct kbd *kb) {
struct drwsurf *d = kb->surf;
struct key *next_key = kb->layout->keys;
bool pressed = false;
wld_fill_rectangle(d->render, kb->scheme.bg.color, 0, 0, kb->w, kb->h);
while (next_key->type != Last) {
if (next_key->type == Pad) {
next_key++;
continue;
}
pressed = next_key->type == Mod && kb->mods & next_key->code;
kbd_draw_key(kb, next_key, pressed);
next_key++;
}
}
void
kbd_resize(struct kbd *kb, uint32_t w, uint32_t h) {
struct drwsurf *d = kb->surf;
kb->w = w;
kb->h = h;
kb->kw = (float)w / (float)KBD_COLS;
kb->kh = (float)h / (float)KBD_ROWS;
drwsurf_resize(d, w, h);
kbd_draw_layout(kb);
d->dirty = true;
}
void
draw_inset(struct drwsurf *d, uint32_t x, uint32_t y, uint32_t width,
uint32_t height, uint32_t border, uint32_t color) {
wld_fill_rectangle(d->render, color, x + border, y + border, width - border,
height - border);
}

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#include "proto/virtual-keyboard-unstable-v1-client-protocol.h"
#include "proto/wlr-layer-shell-unstable-v1-client-protocol.h"
#include "wld/wayland.h"
#include "wld/wld.h"
#include <linux/input-event-codes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <wayland-client.h>
#include "drw.h"
#include "keymap.h"
#include "os-compatibility.h"
/* lazy die macro */
#define die(...) \
fprintf(stderr, __VA_ARGS__); \
exit(0)
/* client state */
static const char *namespace = "wlroots";
static struct wl_display *display;
static struct wl_compositor *compositor;
static struct wl_seat *seat;
static struct wl_shm *shm;
static struct wl_pointer *pointer;
static struct wl_touch *touch;
static struct wl_output *wl_output;
static struct wl_surface *wl_surface;
static struct zwlr_layer_shell_v1 *layer_shell;
static struct zwlr_layer_surface_v1 *layer_surface;
static struct zwp_virtual_keyboard_manager_v1 *vkbd_mgr;
static uint32_t output = UINT32_MAX;
/* drawing */
static struct drw draw_ctx;
static struct drwsurf draw_surf;
/* layer surface parameters */
static uint32_t layer = ZWLR_LAYER_SHELL_V1_LAYER_TOP;
static uint32_t anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM |
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
/* application state */
static bool run_display = true;
static int cur_x = -1, cur_y = -1;
/* event handler prototypes */
static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface,
wl_fixed_t surface_x, wl_fixed_t surface_y);
static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface);
static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
uint32_t time, wl_fixed_t surface_x,
wl_fixed_t surface_y);
static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button,
uint32_t state);
static void wl_touch_down(void *data, struct wl_touch *wl_touch,
uint32_t serial, uint32_t time,
struct wl_surface *surface, int32_t id, wl_fixed_t x,
wl_fixed_t y);
static void wl_touch_up(void *data, struct wl_touch *wl_touch, uint32_t serial,
uint32_t time, int32_t id);
static void wl_touch_motion(void *data, struct wl_touch *wl_touch,
uint32_t time, int32_t id, wl_fixed_t x,
wl_fixed_t y);
static void wl_touch_frame(void *data, struct wl_touch *wl_touch);
static void wl_touch_cancel(void *data, struct wl_touch *wl_touch);
static void wl_touch_shape(void *data, struct wl_touch *wl_touch, int32_t id,
wl_fixed_t major, wl_fixed_t minor);
static void wl_touch_orientation(void *data, struct wl_touch *wl_touch,
int32_t id, wl_fixed_t orientation);
static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps);
static void seat_handle_name(void *data, struct wl_seat *wl_seat,
const char *name);
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface,
uint32_t version);
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name);
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t w, uint32_t h);
static void layer_surface_closed(void *data,
struct zwlr_layer_surface_v1 *surface);
/* event handlers */
static const struct wl_pointer_listener pointer_listener = {
.enter = wl_pointer_enter,
.leave = wl_pointer_leave,
.motion = wl_pointer_motion,
.button = wl_pointer_button,
};
static const struct wl_touch_listener touch_listener = {
.down = wl_touch_down,
.up = wl_touch_up,
.motion = wl_touch_motion,
.frame = wl_touch_frame,
.cancel = wl_touch_cancel,
.shape = wl_touch_shape,
.orientation = wl_touch_orientation,
};
static const struct wl_seat_listener seat_listener = {
.capabilities = seat_handle_capabilities,
.name = seat_handle_name,
};
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
#include "config.h"
void
wl_touch_down(void *data, struct wl_touch *wl_touch, uint32_t serial,
uint32_t time, struct wl_surface *surface, int32_t id,
wl_fixed_t x, wl_fixed_t y) {
struct key *next_key;
uint32_t touch_x, touch_y;
touch_x = wl_fixed_to_int(x);
touch_y = wl_fixed_to_int(y);
kbd_unpress_key(&keyboard, time);
next_key = kbd_get_key(&keyboard, touch_x, touch_y);
if (next_key) {
kbd_press_key(&keyboard, next_key, time);
}
}
void
wl_touch_up(void *data, struct wl_touch *wl_touch, uint32_t serial,
uint32_t time, int32_t id) {
kbd_unpress_key(&keyboard, time);
}
void
wl_touch_motion(void *data, struct wl_touch *wl_touch, uint32_t time,
int32_t id, wl_fixed_t x, wl_fixed_t y) {
kbd_unpress_key(&keyboard, time);
}
void
wl_touch_frame(void *data, struct wl_touch *wl_touch) {}
void
wl_touch_cancel(void *data, struct wl_touch *wl_touch) {}
void
wl_touch_shape(void *data, struct wl_touch *wl_touch, int32_t id,
wl_fixed_t major, wl_fixed_t minor) {}
void
wl_touch_orientation(void *data, struct wl_touch *wl_touch, int32_t id,
wl_fixed_t orientation) {}
void
wl_pointer_enter(void *data, struct wl_pointer *wl_pointer, uint32_t serial,
struct wl_surface *surface, wl_fixed_t surface_x,
wl_fixed_t surface_y) {}
void
wl_pointer_leave(void *data, struct wl_pointer *wl_pointer, uint32_t serial,
struct wl_surface *surface) {
cur_x = cur_y = -1;
}
void
wl_pointer_motion(void *data, struct wl_pointer *wl_pointer, uint32_t time,
wl_fixed_t surface_x, wl_fixed_t surface_y) {
cur_x = wl_fixed_to_int(surface_x);
cur_y = wl_fixed_to_int(surface_y);
kbd_unpress_key(&keyboard, time);
}
void
wl_pointer_button(void *data, struct wl_pointer *wl_pointer, uint32_t serial,
uint32_t time, uint32_t button, uint32_t state) {
struct key *next_key;
bool press = state == WL_POINTER_BUTTON_STATE_PRESSED;
kbd_unpress_key(&keyboard, time);
if (press && cur_x >= 0 && cur_y >= 0) {
next_key = kbd_get_key(&keyboard, cur_x, cur_y);
if (next_key) {
kbd_press_key(&keyboard, next_key, time);
}
}
}
void
seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps) {
if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
pointer = wl_seat_get_pointer(wl_seat);
wl_pointer_add_listener(pointer, &pointer_listener, NULL);
}
if ((caps & WL_SEAT_CAPABILITY_TOUCH)) {
touch = wl_seat_get_touch(wl_seat);
wl_touch_add_listener(touch, &touch_listener, NULL);
}
}
void
seat_handle_name(void *data, struct wl_seat *wl_seat, const char *name) {}
void
handle_global(void *data, struct wl_registry *registry, uint32_t name,
const char *interface, uint32_t version) {
if (strcmp(interface, wl_compositor_interface.name) == 0) {
compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 1);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
} else if (strcmp(interface, "wl_output") == 0) {
if (output != UINT32_MAX) {
if (!wl_output) {
wl_output = wl_registry_bind(registry, name, &wl_output_interface, 1);
} else {
output--;
}
}
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
wl_seat_add_listener(seat, &seat_listener, NULL);
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
layer_shell =
wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, 1);
} else if (strcmp(interface,
zwp_virtual_keyboard_manager_v1_interface.name) == 0) {
vkbd_mgr = wl_registry_bind(registry, name,
&zwp_virtual_keyboard_manager_v1_interface, 1);
}
}
void
handle_global_remove(void *data, struct wl_registry *registry, uint32_t name) {}
void
layer_surface_configure(void *data, struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t w, uint32_t h) {
kbd_resize(&keyboard, w + KBD_PIXEL_OVERSCAN_WIDTH, h);
zwlr_layer_surface_v1_ack_configure(surface, serial);
}
void
layer_surface_closed(void *data, struct zwlr_layer_surface_v1 *surface) {
zwlr_layer_surface_v1_destroy(surface);
wl_surface_destroy(draw_surf.surf);
run_display = false;
}
int
main(int argc, char **argv) {
uint8_t i;
int keymap_fd = os_create_anonymous_file(keymap_size);
/* connect to compositor */
display = wl_display_connect(NULL);
if (display == NULL) {
die("Failed to create display\n");
}
/* acquire state */
struct wl_registry *registry = wl_display_get_registry(display);
wl_registry_add_listener(registry, &registry_listener, NULL);
wl_display_roundtrip(display);
if (compositor == NULL) {
die("wl_compositor not available\n");
}
if (shm == NULL) {
die("wl_shm not available\n");
}
if (layer_shell == NULL) {
die("layer_shell not available\n");
}
if (vkbd_mgr == NULL) {
die("virtual_keyboard_manager not available\n");
}
/* create vkbd */
keyboard.vkbd =
zwp_virtual_keyboard_manager_v1_create_virtual_keyboard(vkbd_mgr, seat);
/* upload keymap */
if (keymap_fd < 0) {
die("could not create keymap fd\n");
}
void *ptr =
mmap(NULL, keymap_size, PROT_READ | PROT_WRITE, MAP_SHARED, keymap_fd, 0);
if (ptr == (void *)-1) {
die("could not map keymap data\n");
}
strcpy(ptr, keymap_str);
zwp_virtual_keyboard_v1_keymap(
keyboard.vkbd, WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1, keymap_fd, keymap_size);
/* init layouts */
for (i = 0; i < NumLayouts; i++) {
if (layouts[i].keys) {
kbd_init_layout(&layouts[i]);
}
}
/* assign kbd state */
keyboard.surf = &draw_surf;
/* create surface */
wl_surface = wl_compositor_create_surface(compositor);
drw_init(&draw_ctx, fc_font_pattern, display, shm);
drwsurf_init(&draw_ctx, &draw_surf, wl_surface);
layer_surface = zwlr_layer_shell_v1_get_layer_surface(
layer_shell, draw_surf.surf, wl_output, layer, namespace);
zwlr_layer_surface_v1_set_size(layer_surface, 0, KBD_PIXEL_HEIGHT);
zwlr_layer_surface_v1_set_anchor(layer_surface, anchor);
zwlr_layer_surface_v1_set_exclusive_zone(layer_surface, KBD_PIXEL_HEIGHT);
zwlr_layer_surface_v1_set_keyboard_interactivity(layer_surface, false);
zwlr_layer_surface_v1_add_listener(layer_surface, &layer_surface_listener,
NULL);
wl_surface_commit(draw_surf.surf);
/* flush requests and start drawing */
wl_display_roundtrip(display);
drwsurf_flip(&draw_surf);
while (wl_display_dispatch(display) != -1 && run_display) {
}
return 0;
}

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/*
* Copyright © 2012 Collabora, Ltd.
*
* 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.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include "os-compatibility.h"
int
os_fd_set_cloexec(int fd) {
long flags;
if (fd == -1)
return -1;
flags = fcntl(fd, F_GETFD);
if (flags == -1)
return -1;
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
return -1;
return 0;
}
static int
set_cloexec_or_close(int fd) {
if (os_fd_set_cloexec(fd) != 0) {
close(fd);
return -1;
}
return fd;
}
int
os_socketpair_cloexec(int domain, int type, int protocol, int *sv) {
int ret;
#ifdef SOCK_CLOEXEC
ret = socketpair(domain, type | SOCK_CLOEXEC, protocol, sv);
if (ret == 0 || errno != EINVAL)
return ret;
#endif
ret = socketpair(domain, type, protocol, sv);
if (ret < 0)
return ret;
sv[0] = set_cloexec_or_close(sv[0]);
sv[1] = set_cloexec_or_close(sv[1]);
if (sv[0] != -1 && sv[1] != -1)
return 0;
close(sv[0]);
close(sv[1]);
return -1;
}
int
os_epoll_create_cloexec(void) {
int fd;
#ifdef EPOLL_CLOEXEC
fd = epoll_create1(EPOLL_CLOEXEC);
if (fd >= 0)
return fd;
if (errno != EINVAL)
return -1;
#endif
fd = epoll_create(1);
return set_cloexec_or_close(fd);
}
static int
create_tmpfile_cloexec(char *tmpname) {
int fd;
#ifdef HAVE_MKOSTEMP
fd = mkostemp(tmpname, O_CLOEXEC);
if (fd >= 0)
unlink(tmpname);
#else
fd = mkstemp(tmpname);
if (fd >= 0) {
fd = set_cloexec_or_close(fd);
unlink(tmpname);
}
#endif
return fd;
}
/*
* Create a new, unique, anonymous file of the given size, and
* return the file descriptor for it. The file descriptor is set
* CLOEXEC. The file is immediately suitable for mmap()'ing
* the given size at offset zero.
*
* The file should not have a permanent backing store like a disk,
* but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
*
* The file name is deleted from the file system.
*
* The file is suitable for buffer sharing between processes by
* transmitting the file descriptor over Unix sockets using the
* SCM_RIGHTS methods.
*
* If the C library implements posix_fallocate(), it is used to
* guarantee that disk space is available for the file at the
* given size. If disk space is insufficient, errno is set to ENOSPC.
* If posix_fallocate() is not supported, program may receive
* SIGBUS on accessing mmap()'ed file contents instead.
*/
int
os_create_anonymous_file(off_t size) {
static const char template[] = "/weston-shared-XXXXXX";
const char *path;
char *name;
int fd;
int ret;
path = getenv("XDG_RUNTIME_DIR");
if (!path) {
errno = ENOENT;
return -1;
}
name = malloc(strlen(path) + sizeof(template));
if (!name)
return -1;
strcpy(name, path);
strcat(name, template);
fd = create_tmpfile_cloexec(name);
free(name);
if (fd < 0)
return -1;
#ifdef HAVE_POSIX_FALLOCATE
do {
ret = posix_fallocate(fd, 0, size);
} while (ret == EINTR);
if (ret != 0) {
close(fd);
errno = ret;
return -1;
}
#else
do {
ret = ftruncate(fd, size);
} while (ret < 0 && errno == EINTR);
if (ret < 0) {
close(fd);
return -1;
}
#endif
return fd;
}
#ifndef MISSING_STRCHRNUL
char *
strchrnul(const char *s, int c) {
while (*s && *s != c)
s++;
return (char *)s;
}
#endif

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/*
* Copyright © 2012 Collabora, Ltd.
*
* 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.
*/
#ifndef OS_COMPATIBILITY_H
#define OS_COMPATIBILITY_H
#include <sys/types.h>
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#else
static inline int
backtrace(void **buffer, int size) {
return 0;
}
#endif
int os_fd_set_cloexec(int fd);
int os_socketpair_cloexec(int domain, int type, int protocol, int *sv);
int os_epoll_create_cloexec(void);
int os_create_anonymous_file(off_t size);
#ifdef MISSING_STRCHRNUL
char *strchrnul(const char *s, int c);
#endif
#endif /* OS_COMPATIBILITY_H */

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<?xml version="1.0" encoding="UTF-8"?>
<protocol name="virtual_keyboard_unstable_v1">
<copyright>
Copyright © 2008-2011 Kristian Høgsberg
Copyright © 2010-2013 Intel Corporation
Copyright © 2012-2013 Collabora, Ltd.
Copyright © 2018 Purism SPC
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice (including the next
paragraph) shall be included in all copies or substantial portions of the
Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
</copyright>
<interface name="zwp_virtual_keyboard_v1" version="1">
<description summary="virtual keyboard">
The virtual keyboard provides an application with requests which emulate
the behaviour of a physical keyboard.
This interface can be used by clients on its own to provide raw input
events, or it can accompany the input method protocol.
</description>
<request name="keymap">
<description summary="keyboard mapping">
Provide a file descriptor to the compositor which can be
memory-mapped to provide a keyboard mapping description.
Format carries a value from the keymap_format enumeration.
</description>
<arg name="format" type="uint" summary="keymap format"/>
<arg name="fd" type="fd" summary="keymap file descriptor"/>
<arg name="size" type="uint" summary="keymap size, in bytes"/>
</request>
<enum name="error">
<entry name="no_keymap" value="0" summary="No keymap was set"/>
</enum>
<request name="key">
<description summary="key event">
A key was pressed or released.
The time argument is a timestamp with millisecond granularity, with an
undefined base. All requests regarding a single object must share the
same clock.
Keymap must be set before issuing this request.
State carries a value from the key_state enumeration.
</description>
<arg name="time" type="uint" summary="timestamp with millisecond granularity"/>
<arg name="key" type="uint" summary="key that produced the event"/>
<arg name="state" type="uint" summary="physical state of the key"/>
</request>
<request name="modifiers">
<description summary="modifier and group state">
Notifies the compositor that the modifier and/or group state has
changed, and it should update state.
The client should use wl_keyboard.modifiers event to synchronize its
internal state with seat state.
Keymap must be set before issuing this request.
</description>
<arg name="mods_depressed" type="uint" summary="depressed modifiers"/>
<arg name="mods_latched" type="uint" summary="latched modifiers"/>
<arg name="mods_locked" type="uint" summary="locked modifiers"/>
<arg name="group" type="uint" summary="keyboard layout"/>
</request>
<request name="destroy" type="destructor" since="1">
<description summary="destroy the virtual keyboard keyboard object"/>
</request>
</interface>
<interface name="zwp_virtual_keyboard_manager_v1" version="1">
<description summary="virtual keyboard manager">
A virtual keyboard manager allows an application to provide keyboard
input events as if they came from a physical keyboard.
</description>
<enum name="error">
<entry name="unauthorized" value="0" summary="client not authorized to use the interface"/>
</enum>
<request name="create_virtual_keyboard">
<description summary="Create a new virtual keyboard">
Creates a new virtual keyboard associated to a seat.
If the compositor enables a keyboard to perform arbitrary actions, it
should present an error when an untrusted client requests a new
keyboard.
</description>
<arg name="seat" type="object" interface="wl_seat"/>
<arg name="id" type="new_id" interface="zwp_virtual_keyboard_v1"/>
</request>
</interface>
</protocol>

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<?xml version="1.0" encoding="UTF-8"?>
<protocol name="wlr_layer_shell_unstable_v1">
<copyright>
Copyright © 2017 Drew DeVault
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this permission
notice appear in supporting documentation, and that the name of
the copyright holders not be used in advertising or publicity
pertaining to distribution of the software without specific,
written prior permission. The copyright holders make no
representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied
warranty.
THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
SPECIAL, 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="zwlr_layer_shell_v1" version="3">
<description summary="create surfaces that are layers of the desktop">
Clients can use this interface to assign the surface_layer role to
wl_surfaces. Such surfaces are assigned to a "layer" of the output and
rendered with a defined z-depth respective to each other. They may also be
anchored to the edges and corners of a screen and specify input handling
semantics. This interface should be suitable for the implementation of
many desktop shell components, and a broad number of other applications
that interact with the desktop.
</description>
<request name="get_layer_surface">
<description summary="create a layer_surface from a surface">
Create a layer surface for an existing surface. This assigns the role of
layer_surface, or raises a protocol error if another role is already
assigned.
Creating a layer surface from a wl_surface which has a buffer attached
or committed is a client error, and any attempts by a client to attach
or manipulate a buffer prior to the first layer_surface.configure call
must also be treated as errors.
After creating a layer_surface object and setting it up, the client
must perform an initial commit without any buffer attached.
The compositor will reply with a layer_surface.configure event.
The client must acknowledge it and is then allowed to attach a buffer
to map the surface.
You may pass NULL for output to allow the compositor to decide which
output to use. Generally this will be the one that the user most
recently interacted with.
Clients can specify a namespace that defines the purpose of the layer
surface.
</description>
<arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
<arg name="surface" type="object" interface="wl_surface"/>
<arg name="output" type="object" interface="wl_output" allow-null="true"/>
<arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
<arg name="namespace" type="string" summary="namespace for the layer surface"/>
</request>
<enum name="error">
<entry name="role" value="0" summary="wl_surface has another role"/>
<entry name="invalid_layer" value="1" summary="layer value is invalid"/>
<entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
</enum>
<enum name="layer">
<description summary="available layers for surfaces">
These values indicate which layers a surface can be rendered in. They
are ordered by z depth, bottom-most first. Traditional shell surfaces
will typically be rendered between the bottom and top layers.
Fullscreen shell surfaces are typically rendered at the top layer.
Multiple surfaces can share a single layer, and ordering within a
single layer is undefined.
</description>
<entry name="background" value="0"/>
<entry name="bottom" value="1"/>
<entry name="top" value="2"/>
<entry name="overlay" value="3"/>
</enum>
<!-- Version 3 additions -->
<request name="destroy" type="destructor" since="3">
<description summary="destroy the layer_shell object">
This request indicates that the client will not use the layer_shell
object any more. Objects that have been created through this instance
are not affected.
</description>
</request>
</interface>
<interface name="zwlr_layer_surface_v1" version="3">
<description summary="layer metadata interface">
An interface that may be implemented by a wl_surface, for surfaces that
are designed to be rendered as a layer of a stacked desktop-like
environment.
Layer surface state (layer, size, anchor, exclusive zone,
margin, interactivity) is double-buffered, and will be applied at the
time wl_surface.commit of the corresponding wl_surface is called.
Attaching a null buffer to a layer surface unmaps it.
Unmapping a layer_surface means that the surface cannot be shown by the
compositor until it is explicitly mapped again. The layer_surface
returns to the state it had right after layer_shell.get_layer_surface.
The client can re-map the surface by performing a commit without any
buffer attached, waiting for a configure event and handling it as usual.
</description>
<request name="set_size">
<description summary="sets the size of the surface">
Sets the size of the surface in surface-local coordinates. The
compositor will display the surface centered with respect to its
anchors.
If you pass 0 for either value, the compositor will assign it and
inform you of the assignment in the configure event. You must set your
anchor to opposite edges in the dimensions you omit; not doing so is a
protocol error. Both values are 0 by default.
Size is double-buffered, see wl_surface.commit.
</description>
<arg name="width" type="uint"/>
<arg name="height" type="uint"/>
</request>
<request name="set_anchor">
<description summary="configures the anchor point of the surface">
Requests that the compositor anchor the surface to the specified edges
and corners. If two orthogonal edges are specified (e.g. 'top' and
'left'), then the anchor point will be the intersection of the edges
(e.g. the top left corner of the output); otherwise the anchor point
will be centered on that edge, or in the center if none is specified.
Anchor is double-buffered, see wl_surface.commit.
</description>
<arg name="anchor" type="uint" enum="anchor"/>
</request>
<request name="set_exclusive_zone">
<description summary="configures the exclusive geometry of this surface">
Requests that the compositor avoids occluding an area with other
surfaces. The compositor's use of this information is
implementation-dependent - do not assume that this region will not
actually be occluded.
A positive value is only meaningful if the surface is anchored to one
edge or an edge and both perpendicular edges. If the surface is not
anchored, anchored to only two perpendicular edges (a corner), anchored
to only two parallel edges or anchored to all edges, a positive value
will be treated the same as zero.
A positive zone is the distance from the edge in surface-local
coordinates to consider exclusive.
Surfaces that do not wish to have an exclusive zone may instead specify
how they should interact with surfaces that do. If set to zero, the
surface indicates that it would like to be moved to avoid occluding
surfaces with a positive exclusive zone. If set to -1, the surface
indicates that it would not like to be moved to accommodate for other
surfaces, and the compositor should extend it all the way to the edges
it is anchored to.
For example, a panel might set its exclusive zone to 10, so that
maximized shell surfaces are not shown on top of it. A notification
might set its exclusive zone to 0, so that it is moved to avoid
occluding the panel, but shell surfaces are shown underneath it. A
wallpaper or lock screen might set their exclusive zone to -1, so that
they stretch below or over the panel.
The default value is 0.
Exclusive zone is double-buffered, see wl_surface.commit.
</description>
<arg name="zone" type="int"/>
</request>
<request name="set_margin">
<description summary="sets a margin from the anchor point">
Requests that the surface be placed some distance away from the anchor
point on the output, in surface-local coordinates. Setting this value
for edges you are not anchored to has no effect.
The exclusive zone includes the margin.
Margin is double-buffered, see wl_surface.commit.
</description>
<arg name="top" type="int"/>
<arg name="right" type="int"/>
<arg name="bottom" type="int"/>
<arg name="left" type="int"/>
</request>
<request name="set_keyboard_interactivity">
<description summary="requests keyboard events">
Set to 1 to request that the seat send keyboard events to this layer
surface. For layers below the shell surface layer, the seat will use
normal focus semantics. For layers above the shell surface layers, the
seat will always give exclusive keyboard focus to the top-most layer
which has keyboard interactivity set to true.
Layer surfaces receive pointer, touch, and tablet events normally. If
you do not want to receive them, set the input region on your surface
to an empty region.
Events is double-buffered, see wl_surface.commit.
</description>
<arg name="keyboard_interactivity" type="uint"/>
</request>
<request name="get_popup">
<description summary="assign this layer_surface as an xdg_popup parent">
This assigns an xdg_popup's parent to this layer_surface. This popup
should have been created via xdg_surface::get_popup with the parent set
to NULL, and this request must be invoked before committing the popup's
initial state.
See the documentation of xdg_popup for more details about what an
xdg_popup is and how it is used.
</description>
<arg name="popup" type="object" interface="xdg_popup"/>
</request>
<request name="ack_configure">
<description summary="ack a configure event">
When a configure event is received, if a client commits the
surface in response to the configure event, then the client
must make an ack_configure request sometime before the commit
request, passing along the serial of the configure event.
If the client receives multiple configure events before it
can respond to one, it only has to ack the last configure event.
A client is not required to commit immediately after sending
an ack_configure request - it may even ack_configure several times
before its next surface commit.
A client may send multiple ack_configure requests before committing, but
only the last request sent before a commit indicates which configure
event the client really is responding to.
</description>
<arg name="serial" type="uint" summary="the serial from the configure event"/>
</request>
<request name="destroy" type="destructor">
<description summary="destroy the layer_surface">
This request destroys the layer surface.
</description>
</request>
<event name="configure">
<description summary="suggest a surface change">
The configure event asks the client to resize its surface.
Clients should arrange their surface for the new states, and then send
an ack_configure request with the serial sent in this configure event at
some point before committing the new surface.
The client is free to dismiss all but the last configure event it
received.
The width and height arguments specify the size of the window in
surface-local coordinates.
The size is a hint, in the sense that the client is free to ignore it if
it doesn't resize, pick a smaller size (to satisfy aspect ratio or
resize in steps of NxM pixels). If the client picks a smaller size and
is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
surface will be centered on this axis.
If the width or height arguments are zero, it means the client should
decide its own window dimension.
</description>
<arg name="serial" type="uint"/>
<arg name="width" type="uint"/>
<arg name="height" type="uint"/>
</event>
<event name="closed">
<description summary="surface should be closed">
The closed event is sent by the compositor when the surface will no
longer be shown. The output may have been destroyed or the user may
have asked for it to be removed. Further changes to the surface will be
ignored. The client should destroy the resource after receiving this
event, and create a new surface if they so choose.
</description>
</event>
<enum name="error">
<entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
<entry name="invalid_size" value="1" summary="size is invalid"/>
<entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
</enum>
<enum name="anchor" bitfield="true">
<entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
<entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
<entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
<entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
</enum>
<!-- Version 2 additions -->
<request name="set_layer" since="2">
<description summary="change the layer of the surface">
Change the layer that the surface is rendered on.
Layer is double-buffered, see wl_surface.commit.
</description>
<arg name="layer" type="uint" enum="zwlr_layer_shell_v1.layer" summary="layer to move this surface to"/>
</request>
</interface>
</protocol>

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