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.gitignore vendored Normal file
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mew
config.h
*.o
*-protocol.*

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LICENSE Normal file
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MIT/X Consortium License
Copyright (c) 2023-2024 sewn <sewn@disroot.org>
Copyright (c) 2015 Eric Pruitt <eric.pruitt@gmail.com>
Copyright (c) 2024 Forrest Bushstone <fgb.1@protonmail.com>
Copyright (c) 2018-2019 Henrik Nyman <h@nyymanni.com>
Copyright (c) 2006-2019 Anselm R Garbe <anselm@garbe.ca>
Copyright (c) 2006-2008 Sander van Dijk <a.h.vandijk@gmail.com>
Copyright (c) 2006-2007 Michał Janeczek <janeczek@gmail.com>
Copyright (c) 2007 Kris Maglione <jg@suckless.org>
Copyright (c) 2009 Gottox <gottox@s01.de>
Copyright (c) 2009 Markus Schnalke <meillo@marmaro.de>
Copyright (c) 2009 Evan Gates <evan.gates@gmail.com>
Copyright (c) 2010-2012 Connor Lane Smith <cls@lubutu.com>
Copyright (c) 2014-2022 Hiltjo Posthuma <hiltjo@codemadness.org>
Copyright (c) 2015-2019 Quentin Rameau <quinq@fifth.space>
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 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.

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# mew - dynamic menu
# See LICENSE file for copyright and license details.
.POSIX:
# mew version
VERSION = 1.0
# pkg-config
PKG_CONFIG = pkg-config
# paths
PREFIX = /usr/local
MANPREFIX = $(PREFIX)/share/man
# includes and libs
PKGS = fcft pixman-1 wayland-client xkbcommon
INCS = `$(PKG_CONFIG) --cflags $(PKGS)`
LIBS = `$(PKG_CONFIG) --libs $(PKGS)`
# flags
EMCPPFLAGS = -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\"
EMCFLAGS = -pedantic -Wall $(INCS) $(EMCPPFLAGS) $(CFLAGS)
LDLIBS = $(LIBS)
all: mew
.c.o:
$(CC) -c $(EMCFLAGS) $<
config.h:
cp config.def.h $@
mew.o: config.h wlr-layer-shell-unstable-v1-protocol.h xdg-shell-protocol.h
mew: wlr-layer-shell-unstable-v1-protocol.o xdg-shell-protocol.o mew.o
$(CC) $(LDFLAGS) -o $@ wlr-layer-shell-unstable-v1-protocol.o xdg-shell-protocol.o mew.o $(LDLIBS)
WAYLAND_PROTOCOLS = `$(PKG_CONFIG) --variable=pkgdatadir wayland-protocols`
WAYLAND_SCANNER = `$(PKG_CONFIG) --variable=wayland_scanner wayland-scanner`
xdg-shell-protocol.h:
$(WAYLAND_SCANNER) client-header $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
xdg-shell-protocol.c:
$(WAYLAND_SCANNER) private-code $(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
wlr-layer-shell-unstable-v1-protocol.h:
$(WAYLAND_SCANNER) client-header wlr-layer-shell-unstable-v1.xml $@
wlr-layer-shell-unstable-v1-protocol.c:
$(WAYLAND_SCANNER) private-code wlr-layer-shell-unstable-v1.xml $@
wlr-layer-shell-unstable-v1-protocol.o: xdg-shell-protocol.o
clean:
rm -f mew *.o *-protocol.*
install: all
mkdir -p $(DESTDIR)$(PREFIX)/bin
cp -f mew mew-run $(DESTDIR)$(PREFIX)/bin
chmod 755 $(DESTDIR)$(PREFIX)/bin/mew
chmod 755 $(DESTDIR)$(PREFIX)/bin/mew-run
mkdir -p $(DESTDIR)$(MANPREFIX)/man1
sed "s/VERSION/$(VERSION)/g" < mew.1 > $(DESTDIR)$(MANPREFIX)/man1/mew.1
chmod 644 $(DESTDIR)$(MANPREFIX)/man1/mew.1
uninstall:
rm -f $(DESTDIR)$(PREFIX)/bin/mew\
$(DESTDIR)$(PREFIX)/bin/mew-run\
$(DESTDIR)$(MANPREFIX)/man1/mew.1
.PHONY: all clean install uninstall

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# mew
mew is a simple menu for Wayland.
## Building
In order to build mew, ensure that you have the following dependencies:
* fcft
* pkg-config
* wayland
* wayland-protocols
* xkbcommon
Afterwards enter the following command to build and install mew
(if necessary as root):
```
make
make install
```
# Usage
See the man page for details.

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/* See LICENSE file for copyright and license details. */
/* Default settings; can be overriden by command line. */
static int top = 1; /* -b option; if 0, appear at bottom */
static const char *fonts[] = { "monospace:size=10" }; /* -f option overrides fonts[0] */
static const char *prompt = NULL; /* -p option; prompt to the left of input field */
static uint32_t colors[][2] = {
/* fg bg */
[SchemeNorm] = { 0xbbbbbbff, 0x222222ff },
[SchemeSel] = { 0xeeeeeeff, 0x005577ff },
[SchemeOut] = { 0x000000ff, 0x00ffffff },
};
/* -l option; if nonzero, use vertical list with given number of lines */
static unsigned int lines = 0;
/*
* Characters not considered part of a word while deleting words
* for example: " /?\"&[]"
*/
static const char worddelimiters[] = " ";

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/*
* drwl - https://codeberg.org/sewn/drwl
* See LICENSE file for copyright and license details.
*/
#pragma once
#include <stdlib.h>
#include <fcft/fcft.h>
#include <pixman-1/pixman.h>
#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
enum { ColFg, ColBg }; /* colorscheme index */
typedef struct {
pixman_image_t *pix;
struct fcft_font *font;
uint32_t *scheme;
} Drwl;
#define UTF_INVALID 0xFFFD
#define UTF_SIZ 4
static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
static const uint32_t utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
static const uint32_t utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
static inline uint32_t
utf8decodebyte(const char c, size_t *i)
{
for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
return (unsigned char)c & ~utfmask[*i];
return 0;
}
static inline size_t
utf8decode(const char *c, uint32_t *u)
{
size_t i, j, len, type;
uint32_t udecoded;
*u = UTF_INVALID;
udecoded = utf8decodebyte(c[0], &len);
if (!BETWEEN(len, 1, UTF_SIZ))
return 1;
for (i = 1, j = 1; i < UTF_SIZ && j < len; ++i, ++j) {
udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
if (type)
return j;
}
if (j < len)
return 0;
*u = udecoded;
if (!BETWEEN(*u, utfmin[len], utfmax[len]) || BETWEEN(*u, 0xD800, 0xDFFF))
*u = UTF_INVALID;
for (i = 1; *u > utfmax[i]; ++i)
;
return len;
}
static int
drwl_init(void)
{
fcft_set_scaling_filter(FCFT_SCALING_FILTER_LANCZOS3);
return fcft_init(FCFT_LOG_COLORIZE_AUTO, 0, FCFT_LOG_CLASS_ERROR);
}
/*
* Caller must call drwl_init before drwl_create, and
* drwl_destroy on returned context after finalizing usage.
*/
static Drwl *
drwl_create(void)
{
Drwl *drwl;
if (!(drwl = calloc(1, sizeof(Drwl))))
return NULL;
return drwl;
}
static void
drwl_setfont(Drwl *drwl, struct fcft_font *font)
{
if (drwl)
drwl->font = font;
}
/*
* Returned font is set within the drawing context if given.
* Caller must call drwl_destroy_font on returned font when done using it,
* otherwise use drwl_destroy when instead given a drwl context.
*/
static struct fcft_font *
drwl_load_font(Drwl *drwl, size_t fontcount,
const char *fonts[static fontcount], const char *attributes)
{
struct fcft_font *font = fcft_from_name(fontcount, fonts, attributes);
if (drwl)
drwl_setfont(drwl, font);
return font;
}
static void
drwl_destroy_font(struct fcft_font *font)
{
fcft_destroy(font);
}
static inline pixman_color_t
convert_color(uint32_t clr)
{
return (pixman_color_t){
((clr >> 24) & 0xFF) * 0x101,
((clr >> 16) & 0xFF) * 0x101,
((clr >> 8) & 0xFF) * 0x101,
(clr & 0xFF) * 0x101
};
}
static void
drwl_setscheme(Drwl *drwl, uint32_t *scm)
{
if (drwl)
drwl->scheme = scm;
}
static inline int
drwl_stride(unsigned int width)
{
return (((PIXMAN_FORMAT_BPP(PIXMAN_a8r8g8b8) * width + 7) / 8 + 4 - 1) & -4);
}
/*
* Caller must call drwl_finish_drawing when finished drawing.
* Parameter stride can be calculated using drwl_stride.
*/
static void
drwl_prepare_drawing(Drwl *drwl, unsigned int w, unsigned int h,
uint32_t *bits, int stride)
{
pixman_region32_t clip;
if (!drwl)
return;
drwl->pix = pixman_image_create_bits_no_clear(
PIXMAN_a8r8g8b8, w, h, bits, stride);
pixman_region32_init_rect(&clip, 0, 0, w, h);
pixman_image_set_clip_region32(drwl->pix, &clip);
pixman_region32_fini(&clip);
}
static void
drwl_rect(Drwl *drwl,
int x, int y, unsigned int w, unsigned int h,
int filled, int invert)
{
pixman_color_t clr;
if (!drwl || !drwl->scheme || !drwl->pix)
return;
clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
if (filled)
pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 1,
&(pixman_rectangle16_t){x, y, w, h});
else
pixman_image_fill_rectangles(PIXMAN_OP_SRC, drwl->pix, &clr, 4,
(pixman_rectangle16_t[4]){
{ x, y, w, 1 },
{ x, y + h - 1, w, 1 },
{ x, y, 1, h },
{ x + w - 1, y, 1, h }});
}
static int
drwl_text(Drwl *drwl,
int x, int y, unsigned int w, unsigned int h,
unsigned int lpad, const char *text, int invert)
{
int ty;
int utf8charlen, render = x || y || w || h;
long x_kern;
uint32_t cp = 0, last_cp = 0;
pixman_color_t clr;
pixman_image_t *fg_pix = NULL;
int noellipsis = 0;
const struct fcft_glyph *glyph, *eg;
int fcft_subpixel_mode = FCFT_SUBPIXEL_DEFAULT;
if (!drwl || (render && (!drwl->scheme || !w || !drwl->pix)) || !text || !drwl->font)
return 0;
if (!render) {
w = invert ? invert : ~invert;
} else {
clr = convert_color(drwl->scheme[invert ? ColBg : ColFg]);
fg_pix = pixman_image_create_solid_fill(&clr);
drwl_rect(drwl, x, y, w, h, 1, !invert);
x += lpad;
w -= lpad;
}
if (render && (drwl->scheme[ColBg] & 0xFF) != 0xFF)
fcft_subpixel_mode = FCFT_SUBPIXEL_NONE;
// U+2026 == …
eg = fcft_rasterize_char_utf32(drwl->font, 0x2026, fcft_subpixel_mode);
while (*text) {
utf8charlen = utf8decode(text, &cp);
glyph = fcft_rasterize_char_utf32(drwl->font, cp, fcft_subpixel_mode);
if (!glyph)
continue;
x_kern = 0;
if (last_cp)
fcft_kerning(drwl->font, last_cp, cp, &x_kern, NULL);
last_cp = cp;
ty = y + (h - drwl->font->height) / 2 + drwl->font->ascent;
/* draw ellipsis if remaining text doesn't fit */
if (!noellipsis && x_kern + glyph->advance.x + eg->advance.x > w && *(text + 1) != '\0') {
if (drwl_text(drwl, 0, 0, 0, 0, 0, text, 0)
- glyph->advance.x < eg->advance.x) {
noellipsis = 1;
} else {
w -= eg->advance.x;
pixman_image_composite32(
PIXMAN_OP_OVER, fg_pix, eg->pix, drwl->pix, 0, 0, 0, 0,
x + eg->x, ty - eg->y, eg->width, eg->height);
}
}
if ((x_kern + glyph->advance.x) > w)
break;
x += x_kern;
if (render && pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8)
// pre-rendered glyphs (eg. emoji)
pixman_image_composite32(
PIXMAN_OP_OVER, glyph->pix, NULL, drwl->pix, 0, 0, 0, 0,
x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
else if (render)
pixman_image_composite32(
PIXMAN_OP_OVER, fg_pix, glyph->pix, drwl->pix, 0, 0, 0, 0,
x + glyph->x, ty - glyph->y, glyph->width, glyph->height);
text += utf8charlen;
x += glyph->advance.x;
w -= glyph->advance.x;
}
if (render)
pixman_image_unref(fg_pix);
return x + (render ? w : 0);
}
static unsigned int
drwl_font_getwidth(Drwl *drwl, const char *text)
{
if (!drwl || !drwl->font || !text)
return 0;
return drwl_text(drwl, 0, 0, 0, 0, 0, text, 0);
}
static unsigned int
drwl_font_getwidth_clamp(Drwl *drwl, const char *text, unsigned int n)
{
unsigned int tmp = 0;
if (drwl && drwl->font && text && n)
tmp = drwl_text(drwl, 0, 0, 0, 0, 0, text, n);
return tmp < n ? tmp : n;
}
static void
drwl_finish_drawing(Drwl *drwl)
{
if (drwl && drwl->pix)
pixman_image_unref(drwl->pix);
}
static void
drwl_destroy(Drwl *drwl)
{
if (drwl->pix)
pixman_image_unref(drwl->pix);
if (drwl->font)
drwl_destroy_font(drwl->font);
free(drwl);
}
static void
drwl_fini(void)
{
fcft_fini();
}

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#!/bin/sh
cachedir="${XDG_CACHE_HOME:-"$HOME/.cache"}"
cache="$cachedir/mew_run"
[ -d "$cachedir" ] || mkdir -p "$cachedir"
uptodate() {
[ -f "$cache" ] || return 1
IFS=:
for path in $PATH; do
# non-POSIX
test "$path" -nt "$cache" && return 1
done
return 0
}
bins() {
IFS=:
for path in $PATH; do
for bin in "$path"/*; do
[ -x "$bin" ] && echo "${bin##*/}"
done
done
}
path() {
if uptodate; then
cat "$cache"
else
bins | sort -u | tee "$cache"
fi
}
path | mew "$@" | ${SHELL:-"/bin/sh"} &

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.TH EMENU 1 mew\-VERSION
.SH NAME
mew \- menu for wayland
.SH SYNOPSIS
.B mew
.RB [ \-biv ]
.RB [ \-l
.IR lines ]
.RB [ \-p
.IR prompt ]
.RB [ \-f
.IR font ]
.RB [ \-nb
.IR color ]
.RB [ \-nf
.IR color ]
.RB [ \-sb
.IR color ]
.RB [ \-sf
.IR color ]
.P
.BR mew-run " ..."
.SH DESCRIPTION
.B mew
is an simple dynamic menu for Wayland that reads a list of newline\-separated items
from stdin. When the user selects an item and presses Return, their choice is printed
to stdout and mew terminates. Entering text will narrow the items to those
matching the tokens in the input.
.P
.B mew-run
is a script spawned by the compositor that lists programs in the user's $PATH and
runs the result in their $SHELL.
.SH OPTIONS
.TP
.B \-b
appear at the bottom of the screen.
.TP
.B \-i
matches menu items case insensitively.
.TP
.BI \-l " lines"
lists item vertically, with the given number of lines.
.TP
.BI \-p " prompt"
defines the prompt to be displayed to the left of the input field.
.TP
.BI \-f " font"
defines the font.
.TP
.BI \-nb " color"
defines the normal background color of the format:
.IR #RRGGBB[FF]
.TP
.BI \-nf " color"
defines the normal foreground color of the format:
.IR #RRGGBB[FF]
.TP
.BI \-sb " color"
defines the selected background color of the format:
.IR #RRGGBB[FF]
.TP
.BI \-sf " color"
defines the selected foreground color of the format:
.IR #RRGGBB[FF]
.TP
.B \-v
prints version information to stdout, then exits.
.SH USAGE
mew is completely controlled by the keyboard. Items are selected using the
arrow keys, page up, page down, home, and end.
.TP
.B Tab
Copy the selected item to the input field.
.TP
.B Return
Confirm selection. Prints the selected item to stdout and exits, returning
success.
.TP
.B Ctrl-Return
Confirm selection. Prints the selected item to stdout and continues.
.TP
.B Shift\-Return
Confirm input. Prints the input text to stdout and exits, returning success.
.TP
.B Escape
Exit without selecting an item, returning failure.
.TP
.B Ctrl-Left
Move cursor to the start of the current word
.TP
.B Ctrl-Right
Move cursor to the end of the current word
.TP
.B C\-a
Home
.TP
.B C\-b
Left
.TP
.B C\-c
Escape
.TP
.B C\-d
Delete
.TP
.B C\-e
End
.TP
.B C\-f
Right
.TP
.B C\-g
Escape
.TP
.B C\-h
Backspace
.TP
.B C\-i
Tab
.TP
.B C\-j
Return
.TP
.B C\-J
Shift-Return
.TP
.B C\-k
Delete line right
.TP
.B C\-m
Return
.TP
.B C\-M
Shift-Return
.TP
.B C\-n
Down
.TP
.B C\-p
Up
.TP
.B C\-u
Delete line left
.TP
.B C\-w
Delete word left
.TP
.B C\-y
Paste from Wayland clipboard
.TP
.B C\-Y
Paste from Wayland clipboard

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/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <poll.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/timerfd.h>
#include <wayland-client.h>
#include <xkbcommon/xkbcommon.h>
#define MAX(A, B) ((A) > (B) ? (A) : (B))
#define MIN(A, B) ((A) < (B) ? (A) : (B))
#define BETWEEN(X, A, B) ((A) <= (X) && (X) <= (B))
#define LENGTH(X) (sizeof (X) / sizeof (X)[0])
#include "drwl.h"
#include "poolbuf.h"
#include "wlr-layer-shell-unstable-v1-protocol.h"
#define TEXTW(X) (drwl_font_getwidth(drw, (X)) + lrpad)
enum { SchemeNorm, SchemeSel, SchemeOut }; /* color schemes */
struct item {
char *text;
struct item *left, *right;
int out;
};
static struct {
struct wl_keyboard *wl_keyboard;
struct xkb_context *xkb_context;
struct xkb_keymap *xkb_keymap;
struct xkb_state *xkb_state;
int repeat_delay;
int repeat_period;
int repeat_timer;
enum wl_keyboard_key_state repeat_key_state;
xkb_keysym_t repeat_sym;
int ctrl;
int shift;
} kbd;
static char text[BUFSIZ] = "";
static int bh, mw, mh;
static int inputw = 0, promptw;
static int32_t scale = 1;
static int lrpad; /* sum of left and right padding */
static size_t cursor;
static struct item *items = NULL;
static struct item *matches, *matchend;
static struct item *prev, *curr, *next, *sel;
static int running = 1;
static struct wl_display *display;
static struct wl_compositor *compositor;
static struct wl_seat *seat;
static struct wl_shm *shm;
static struct wl_data_device_manager *data_device_manager;
static struct wl_data_device *data_device;
static struct wl_data_offer *data_offer;
static struct zwlr_layer_shell_v1 *layer_shell;
static struct zwlr_layer_surface_v1 *layer_surface;
static struct wl_surface *surface;
static struct wl_registry *registry;
static Drwl *drw;
#include "config.h"
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
static void
noop()
{
/* Space intentionally left blank */
}
static void
die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
fputc(' ', stderr);
perror(NULL);
} else {
fputc('\n', stderr);
}
exit(EXIT_FAILURE);
}
static void
parse_color(uint32_t *dest, const char *src)
{
int len;
if (src[0] == '#')
src++;
len = strlen(src);
if (len != 6 && len != 8)
die("bad color: %s", src);
*dest = strtoul(src, NULL, 16);
if (len == 6)
*dest = (*dest << 8) | 0xFF;
}
static void
loadfonts(void)
{
char fontattrs[12];
drwl_destroy_font(drw->font);
snprintf(fontattrs, sizeof(fontattrs), "dpi=%d", 96 * scale);
if (!(drwl_load_font(drw, LENGTH(fonts), fonts, fontattrs)))
die("no fonts could be loaded");
lrpad = drw->font->height;
bh = drw->font->height + 2;
lines = MAX(lines, 0);
mh = (lines + 1) * bh;
promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
}
static unsigned int
textw_clamp(const char *str, unsigned int n)
{
unsigned int w = drwl_font_getwidth_clamp(drw, str, n) + lrpad;
return MIN(w, n);
}
static void
appenditem(struct item *item, struct item **list, struct item **last)
{
if (*last)
(*last)->right = item;
else
*list = item;
item->left = *last;
item->right = NULL;
*last = item;
}
static void
calcoffsets(void)
{
int i, n;
if (lines > 0)
n = lines * bh;
else
n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
/* calculate which items will begin the next page and previous page */
for (i = 0, next = curr; next; next = next->right)
if ((i += (lines > 0) ? bh : textw_clamp(next->text, n)) > n)
break;
for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
if ((i += (lines > 0) ? bh : textw_clamp(prev->left->text, n)) > n)
break;
}
static void
cleanup(void)
{
size_t i;
for (i = 0; items && items[i].text; ++i)
free(items[i].text);
free(items);
drwl_destroy(drw);
drwl_fini();
wl_data_device_release(data_device);
zwlr_layer_shell_v1_destroy(layer_shell);
wl_shm_destroy(shm);
wl_compositor_destroy(compositor);
wl_registry_destroy(registry);
wl_display_disconnect(display);
}
static char *
cistrstr(const char *h, const char *n)
{
size_t i;
if (!n[0])
return (char *)h;
for (; *h; ++h) {
for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
tolower((unsigned char)h[i]); ++i)
;
if (n[i] == '\0')
return (char *)h;
}
return NULL;
}
static int
drawitem(struct item *item, int x, int y, int w)
{
if (item == sel)
drwl_setscheme(drw, colors[SchemeSel]);
else if (item->out)
drwl_setscheme(drw, colors[SchemeOut]);
else
drwl_setscheme(drw, colors[SchemeNorm]);
return drwl_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
}
static void
drawmenu(void)
{
unsigned int curpos;
struct item *item;
int x = 0, y = 0, w;
PoolBuf *buf;
if (!(buf = poolbuf_create(shm, mw, mh)))
die("poolbuf_create:");
drwl_prepare_drawing(drw, mw, mh, buf->data, buf->stride);
drwl_setscheme(drw, colors[SchemeNorm]);
drwl_rect(drw, 0, 0, mw, mh, 1, 1);
if (prompt && *prompt) {
drwl_setscheme(drw, colors[SchemeSel]);
x = drwl_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
}
/* draw input field */
w = (lines > 0 || !matches) ? mw - x : inputw;
drwl_setscheme(drw, colors[SchemeNorm]);
drwl_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
curpos = TEXTW(text) - TEXTW(&text[cursor]);
if ((curpos += lrpad / 2 - 1) < w) {
drwl_setscheme(drw, colors[SchemeNorm]);
drwl_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
}
if (lines > 0) {
/* draw vertical list */
for (item = curr; item != next; item = item->right)
drawitem(item, x, y += bh, mw - x);
} else if (matches) {
/* draw horizontal list */
x += inputw;
w = TEXTW("<");
if (curr->left) {
drwl_setscheme(drw, colors[SchemeNorm]);
drwl_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
}
x += w;
for (item = curr; item != next; item = item->right)
x = drawitem(item, x, 0, textw_clamp(item->text, mw - x - TEXTW(">")));
if (next) {
w = TEXTW(">");
drwl_setscheme(drw, colors[SchemeNorm]);
drwl_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
}
}
drwl_finish_drawing(drw);
wl_surface_set_buffer_scale(surface, scale);
wl_surface_attach(surface, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(surface, 0, 0, mw, mh);
poolbuf_destroy(buf);
wl_surface_commit(surface);
}
static void
match(void)
{
static char **tokv = NULL;
static int tokn = 0;
char buf[sizeof text], *s;
int i, tokc = 0;
size_t len, textsize;
struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
strcpy(buf, text);
/* separate input text into tokens to be matched individually */
for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
die("cannot realloc %zu bytes:", tokn * sizeof *tokv);
len = tokc ? strlen(tokv[0]) : 0;
matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
textsize = strlen(text) + 1;
for (item = items; item && item->text; item++) {
for (i = 0; i < tokc; i++)
if (!fstrstr(item->text, tokv[i]))
break;
if (i != tokc) /* not all tokens match */
continue;
/* exact matches go first, then prefixes, then substrings */
if (!tokc || !fstrncmp(text, item->text, textsize))
appenditem(item, &matches, &matchend);
else if (!fstrncmp(tokv[0], item->text, len))
appenditem(item, &lprefix, &prefixend);
else
appenditem(item, &lsubstr, &substrend);
}
if (lprefix) {
if (matches) {
matchend->right = lprefix;
lprefix->left = matchend;
} else
matches = lprefix;
matchend = prefixend;
}
if (lsubstr) {
if (matches) {
matchend->right = lsubstr;
lsubstr->left = matchend;
} else
matches = lsubstr;
matchend = substrend;
}
curr = sel = matches;
calcoffsets();
}
static void
insert(const char *str, ssize_t n)
{
if (strlen(text) + n > sizeof text - 1)
return;
/* move existing text out of the way, insert new text, and update cursor */
memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
if (n > 0)
memcpy(&text[cursor], str, n);
cursor += n;
match();
}
static size_t
nextrune(int inc)
{
ssize_t n;
/* return location of next utf8 rune in the given direction (+1 or -1) */
for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
;
return n;
}
static void
movewordedge(int dir)
{
if (dir < 0) { /* move cursor to the start of the word*/
while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
cursor = nextrune(-1);
while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
cursor = nextrune(-1);
} else { /* move cursor to the end of the word */
while (text[cursor] && strchr(worddelimiters, text[cursor]))
cursor = nextrune(+1);
while (text[cursor] && !strchr(worddelimiters, text[cursor]))
cursor = nextrune(+1);
}
}
static void
paste(void)
{
int fds[2];
ssize_t n;
char buf[1024];
if (!data_offer)
return;
if (pipe(fds) < 0)
die("pipe");
wl_data_offer_receive(data_offer, "text/plain", fds[1]);
close(fds[1]);
wl_display_roundtrip(display);
for (;;) {
n = read(fds[0], buf, sizeof(buf));
if (n <= 0)
break;
insert(buf, n);
}
close(fds[0]);
wl_data_offer_destroy(data_offer);
}
static void
keyboard_keypress(enum wl_keyboard_key_state state, xkb_keysym_t sym, int ctrl, int shift)
{
char buf[8];
if (state != WL_KEYBOARD_KEY_STATE_PRESSED)
return;
if (ctrl) {
switch (xkb_keysym_to_lower(sym)) {
case XKB_KEY_a: sym = XKB_KEY_Home; break;
case XKB_KEY_b: sym = XKB_KEY_Left; break;
case XKB_KEY_c: sym = XKB_KEY_Escape; break;
case XKB_KEY_d: sym = XKB_KEY_Delete; break;
case XKB_KEY_e: sym = XKB_KEY_End; break;
case XKB_KEY_f: sym = XKB_KEY_BackSpace; break;
case XKB_KEY_g: sym = XKB_KEY_Escape; break;
case XKB_KEY_h: sym = XKB_KEY_BackSpace; break;
case XKB_KEY_i: sym = XKB_KEY_Tab; break;
case XKB_KEY_j: /* fallthrough */
case XKB_KEY_J: /* fallthrough */
case XKB_KEY_m: /* fallthrough */
case XKB_KEY_M: sym = XKB_KEY_Return; break;
case XKB_KEY_n: sym = XKB_KEY_Right; break;
case XKB_KEY_p: sym = XKB_KEY_Up; break;
case XKB_KEY_k: /* delete right */
text[cursor] = '\0';
match();
goto draw;
case XKB_KEY_u: /* delete left */
insert(NULL, 0 - cursor);
goto draw;
case XKB_KEY_w: /* delete word */
while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
insert(NULL, nextrune(-1) - cursor);
while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
insert(NULL, nextrune(-1) - cursor);
goto draw;
case XKB_KEY_y: /* paste selection */
case XKB_KEY_Y:
paste();
goto draw;
case XKB_KEY_Left:
case XKB_KEY_KP_Left:
movewordedge(-1);
goto draw;
case XKB_KEY_Right:
case XKB_KEY_KP_Right:
movewordedge(+1);
goto draw;
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
break;
case XKB_KEY_bracketleft:
cleanup();
exit(EXIT_FAILURE);
}
}
switch (sym) {
case XKB_KEY_Delete:
case XKB_KEY_KP_Delete:
if (text[cursor] == '\0')
return;
cursor = nextrune(+1);
/* fallthrough */
case XKB_KEY_BackSpace:
if (cursor == 0)
return;
insert(NULL, nextrune(-1) - cursor);
break;
case XKB_KEY_End:
case XKB_KEY_KP_End:
if (text[cursor] != '\0') {
cursor = strlen(text);
break;
}
if (next) {
/* jump to end of list and position items in reverse */
curr = matchend;
calcoffsets();
curr = prev;
calcoffsets();
while (next && (curr = curr->right))
calcoffsets();
}
sel = matchend;
break;
case XKB_KEY_Escape:
cleanup();
exit(EXIT_FAILURE);
case XKB_KEY_Home:
case XKB_KEY_KP_Home:
if (sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XKB_KEY_Left:
case XKB_KEY_KP_Left:
if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
cursor = nextrune(-1);
break;
}
if (lines > 0)
return;
/* fallthrough */
case XKB_KEY_Up:
case XKB_KEY_KP_Up:
if (sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
break;
case XKB_KEY_Next:
case XKB_KEY_KP_Next:
if (!next)
return;
sel = curr = next;
calcoffsets();
break;
case XKB_KEY_Prior:
case XKB_KEY_KP_Prior:
if (!prev)
return;
sel = curr = prev;
calcoffsets();
break;
case XKB_KEY_Return:
case XKB_KEY_KP_Enter:
puts((sel && !shift) ? sel->text : text);
if (!ctrl)
running = 0;
return;
case XKB_KEY_Right:
case XKB_KEY_KP_Right:
if (text[cursor] != '\0') {
cursor = nextrune(+1);
break;
}
if (lines > 0)
return;
/* fallthrough */
case XKB_KEY_Down:
case XKB_KEY_KP_Down:
if (sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
break;
case XKB_KEY_Tab:
if (!sel)
return;
cursor = strnlen(sel->text, sizeof text - 1);
memcpy(text, sel->text, cursor);
text[cursor] = '\0';
match();
break;
default:
if (xkb_keysym_to_utf8(sym, buf, 8))
insert(buf, strnlen(buf, 8));
}
draw:
drawmenu();
}
static void
keyboard_handle_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int32_t fd, uint32_t size)
{
char *map_shm;
if (format != WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1)
die("unknown keymap");
map_shm = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
if (map_shm == MAP_FAILED)
die("mmap:");
kbd.xkb_keymap = xkb_keymap_new_from_string(kbd.xkb_context, map_shm,
XKB_KEYMAP_FORMAT_TEXT_V1, XKB_KEYMAP_COMPILE_NO_FLAGS);
munmap(map_shm, size);
close(fd);
kbd.xkb_state = xkb_state_new(kbd.xkb_keymap);
}
static void
keyboard_handle_key(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t time, uint32_t key, uint32_t _key_state)
{
struct itimerspec spec = { 0 };
enum wl_keyboard_key_state key_state = _key_state;
xkb_keysym_t sym = xkb_state_key_get_one_sym(kbd.xkb_state, key + 8);
keyboard_keypress(key_state, sym, kbd.ctrl, kbd.shift);
if (key_state == WL_KEYBOARD_KEY_STATE_PRESSED && kbd.repeat_period >= 0) {
kbd.repeat_key_state = key_state;
kbd.repeat_sym = sym;
spec.it_value.tv_sec = kbd.repeat_delay / 1000;
spec.it_value.tv_nsec = (kbd.repeat_delay % 1000) * 1000000l;
}
timerfd_settime(kbd.repeat_timer, 0, &spec, NULL);
}
static void
keyboard_handle_modifiers(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t mods_depressed,
uint32_t mods_latched, uint32_t mods_locked, uint32_t group)
{
xkb_state_update_mask(kbd.xkb_state,
mods_depressed, mods_latched, mods_locked, 0, 0, group);
kbd.ctrl = xkb_state_mod_name_is_active(kbd.xkb_state,
XKB_MOD_NAME_CTRL,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
kbd.shift = xkb_state_mod_name_is_active(kbd.xkb_state,
XKB_MOD_NAME_SHIFT,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
}
static void
keyboard_repeat(void)
{
struct itimerspec spec = { 0 };
keyboard_keypress(kbd.repeat_key_state, kbd.repeat_sym, kbd.ctrl, kbd.shift);
spec.it_value.tv_sec = kbd.repeat_period / 1000;
spec.it_value.tv_nsec = (kbd.repeat_period % 1000) * 1000000l;
timerfd_settime(kbd.repeat_timer, 0, &spec, NULL);
}
static void
keyboard_handle_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
int32_t rate, int32_t delay)
{
kbd.repeat_delay = delay;
kbd.repeat_period = rate >= 0 ? 1000 / rate : -1;
}
static const struct wl_keyboard_listener keyboard_listener = {
.keymap = keyboard_handle_keymap,
.enter = noop,
.leave = noop,
.key = keyboard_handle_key,
.modifiers = keyboard_handle_modifiers,
.repeat_info = keyboard_handle_repeat_info,
};
static void
layer_surface_handle_configure(void *data, struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t width, uint32_t height)
{
mw = width * scale;
mh = height * scale;
inputw = mw / 3; /* input width: ~33% of monitor width */
zwlr_layer_surface_v1_ack_configure(surface, serial);
drawmenu();
}
static void
layer_surface_handle_closed(void *data, struct zwlr_layer_surface_v1 *surface)
{
running = 0;
}
static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_handle_configure,
.closed = layer_surface_handle_closed,
};
static void
surface_handle_preferred_scale(void *data,
struct wl_surface *wl_surface, int32_t factor)
{
scale = factor;
loadfonts();
zwlr_layer_surface_v1_set_size(layer_surface, 0, mh / scale);
}
static const struct wl_surface_listener surface_listener = {
.enter = noop,
.leave = noop,
.preferred_buffer_scale = surface_handle_preferred_scale,
.preferred_buffer_transform = noop,
};
static void
data_device_handle_selection(void *data, struct wl_data_device *data_device,
struct wl_data_offer *_data_offer)
{
data_offer = _data_offer;
}
static const struct wl_data_device_listener data_device_listener = {
.data_offer = noop,
.selection = data_device_handle_selection,
};
static void
seat_handle_capabilities(void *data, struct wl_seat *wl_seat, enum wl_seat_capability caps)
{
if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD))
return;
kbd.wl_keyboard = wl_seat_get_keyboard(seat);
if (!(kbd.xkb_context = xkb_context_new(XKB_CONTEXT_NO_FLAGS)))
die("xkb_context_new failed");
if ((kbd.repeat_timer = timerfd_create(CLOCK_MONOTONIC, 0)) < 0)
die("timerfd_create:");
wl_keyboard_add_listener(kbd.wl_keyboard, &keyboard_listener, NULL);
}
static const struct wl_seat_listener seat_listener = {
.capabilities = seat_handle_capabilities,
.name = noop,
};
static void
registry_handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version)
{
if (!strcmp(interface, wl_compositor_interface.name))
compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 6);
else if (!strcmp(interface, wl_shm_interface.name))
shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
else if (!strcmp(interface, zwlr_layer_shell_v1_interface.name))
layer_shell = wl_registry_bind(registry, name,
&zwlr_layer_shell_v1_interface, 1);
else if (!strcmp(interface, wl_data_device_manager_interface.name))
data_device_manager = wl_registry_bind(registry, name,
&wl_data_device_manager_interface, 3);
else if (!strcmp(interface, wl_seat_interface.name)) {
seat = wl_registry_bind (registry, name, &wl_seat_interface, 4);
wl_seat_add_listener(seat, &seat_listener, NULL);
}
}
static const struct wl_registry_listener registry_listener = {
.global = registry_handle_global,
.global_remove = noop,
};
static void
readstdin(void)
{
char *line = NULL;
size_t i, itemsiz = 0, linesiz = 0;
ssize_t len;
/* read each line from stdin and add it to the item list */
for (i = 0; (len = getline(&line, &linesiz, stdin)) != -1; i++) {
if (i + 1 >= itemsiz) {
itemsiz += 256;
if (!(items = realloc(items, itemsiz * sizeof(*items))))
die("cannot realloc %zu bytes:", itemsiz * sizeof(*items));
}
if (line[len - 1] == '\n')
line[len - 1] = '\0';
if (!(items[i].text = strdup(line)))
die("strdup:");
items[i].out = 0;
}
free(line);
if (items)
items[i].text = NULL;
lines = MIN(lines, i);
}
static void
run(void)
{
struct pollfd pfds[] = {
{ wl_display_get_fd(display), POLLIN },
{ kbd.repeat_timer, POLLIN },
};
match();
drawmenu();
while (running) {
if (wl_display_prepare_read(display) < 0)
if (wl_display_dispatch_pending(display) < 0)
die("wl_display_dispatch_pending:");
if (wl_display_flush(display) < 0)
die("wl_display_flush:");
if (poll(pfds, LENGTH(pfds), -1) < 0) {
wl_display_cancel_read(display);
die("poll:");
}
if (pfds[1].revents & POLLIN)
keyboard_repeat();
if (!(pfds[0].revents & POLLIN)) {
wl_display_cancel_read(display);
continue;
}
if (wl_display_read_events(display) < 0)
die("wl_display_read_events:");
if (wl_display_dispatch_pending(display) < 0)
die("wl_display_dispatch_pending:");
}
}
static void
setup(void)
{
if (!(display = wl_display_connect(NULL)))
die("failed to connect to wayland");
registry = wl_display_get_registry(display);
wl_registry_add_listener(registry, &registry_listener, NULL);
wl_display_roundtrip(display);
if (!compositor)
die("wl_compositor not available");
if (!shm)
die("wl_shm not available");
if (!layer_shell)
die("layer_shell not available");
if (!data_device_manager)
die("data_device_manager not available");
data_device = wl_data_device_manager_get_data_device(
data_device_manager, seat);
wl_data_device_add_listener(data_device, &data_device_listener, NULL);
drwl_init();
if (!(drw = drwl_create()))
die("cannot create drwl drawing context");
loadfonts();
match();
surface = wl_compositor_create_surface(compositor);
wl_surface_add_listener(surface, &surface_listener, NULL);
layer_surface = zwlr_layer_shell_v1_get_layer_surface(layer_shell,
surface, NULL, ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY, "mew");
zwlr_layer_surface_v1_set_size(layer_surface, 0, mh);
zwlr_layer_surface_v1_set_anchor(layer_surface,
(top ? ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP : ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM ) |
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
zwlr_layer_surface_v1_set_exclusive_zone(layer_surface, -1);
zwlr_layer_surface_v1_set_keyboard_interactivity(layer_surface, true);
zwlr_layer_surface_v1_add_listener(layer_surface,
&layer_surface_listener, NULL);
wl_surface_commit(surface);
wl_display_roundtrip(display);
}
static void
usage(void)
{
die("usage: mew [-biv] [-l lines] [-p prompt] [-f font]\n"
" [-nb color] [-nf color] [-sb color] [-sf color]");
}
int
main(int argc, char *argv[])
{
int i;
for (i = 1; i < argc; i++) {
/* these options take no arguments */
if (!strcmp(argv[i], "-v")) {
puts("mew-"VERSION);
exit(0);
} else if (!strcmp(argv[i], "-b"))
top = 0;
else if (!strcmp(argv[i], "-i")) {
fstrncmp = strncasecmp;
fstrstr = cistrstr;
} else if (i + 1 == argc)
usage();
else if (!strcmp(argv[i], "-l"))
lines = atoi(argv[++i]);
else if (!strcmp(argv[i], "-p"))
prompt = argv[++i];
else if (!strcmp(argv[i], "-f"))
fonts[0] = argv[++i];
else if (!strcmp(argv[i], "-nb"))
parse_color(&colors[SchemeNorm][ColBg], argv[++i]);
else if (!strcmp(argv[i], "-nf"))
parse_color(&colors[SchemeNorm][ColFg], argv[++i]);
else if (!strcmp(argv[i], "-sb"))
parse_color(&colors[SchemeSel][ColBg], argv[++i]);
else if (!strcmp(argv[i], "-sf"))
parse_color(&colors[SchemeSel][ColFg], argv[++i]);
else
usage();
}
readstdin();
#ifdef __OpenBSD__
if (pledge("stdio rpath", NULL) == -1)
die("pledge");
#endif
setup();
run();
cleanup();
return EXIT_SUCCESS;
}

112
poolbuf.h Normal file
View file

@ -0,0 +1,112 @@
/*
* poolbuf - https://codeberg.org/sewn/drwl
* See LICENSE file for copyright and license details.
*/
#include <stddef.h>
#include <stdint.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <wayland-client.h>
#include "drwl.h"
typedef struct {
struct wl_buffer *wl_buf;
int32_t stride;
int32_t size;
void *data;
} PoolBuf;
#if defined(__linux__) || defined(___FreeBSD__)
#ifdef __linux__
#include <linux/memfd.h>
#endif
#define __POOLBUF_HAS_MEMFD_CREATE
int memfd_create(const char *, unsigned);
#else
static void
randname(char *buf)
{
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
long r = ts.tv_nsec;
for (int i = 0; i < 6; ++i) {
buf[i] = 'A'+(r&15)+(r&16)*2;
r >>= 5;
}
}
static int
create_shm(void)
{
char name[] = "/drwl-XXXXXX";
int retries = 100;
do {
randname(name + sizeof(name) - 7);
--retries;
int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd >= 0) {
shm_unlink(name);
return fd;
}
} while (retries > 0 && errno == EEXIST);
return -1;
}
#endif
/* Caller must call poolbuf_destroy after finalizing usage */
static PoolBuf *
poolbuf_create(struct wl_shm *shm, int32_t width, int32_t height)
{
int fd;
void *data;
struct wl_shm_pool *shm_pool;
struct wl_buffer *wl_buf;
int32_t stride = drwl_stride(width);
int32_t size = stride * height;
PoolBuf *buf;
#ifdef __POOLBUF_HAS_MEMFD_CREATE
fd = memfd_create("drwl-shm-buffer-pool",
MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_NOEXEC_SEAL);
#else
fd = create_shm();
#endif
if (fd < 0)
return NULL;
if ((ftruncate(fd, size)) < 0) {
close(fd);
return NULL;
}
data = mmap(NULL, size,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (data == MAP_FAILED) {
close(fd);
return NULL;
}
shm_pool = wl_shm_create_pool(shm, fd, size);
wl_buf = wl_shm_pool_create_buffer(shm_pool, 0,
width, height, stride, WL_SHM_FORMAT_ARGB8888);
wl_shm_pool_destroy(shm_pool);
close(fd);
buf = calloc(1, sizeof(PoolBuf));
buf->wl_buf = wl_buf;
buf->stride = stride;
buf->size = size;
buf->data = data;
return buf;
}
static void
poolbuf_destroy(PoolBuf *buf)
{
wl_buffer_destroy(buf->wl_buf);
munmap(buf->data, buf->size);
free(buf);
}

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@ -0,0 +1,285 @@
<?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="1">
<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.
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>
</interface>
<interface name="zwlr_layer_surface_v1" version="1">
<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 (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.
</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 orthoginal 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 of the surface
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 an
edge, rather than a corner. The zone is the number of surface-local
coordinates from the edge that are considered 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 excluzive 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>
</interface>
</protocol>