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Separate menu state from Wayland state

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This commit is contained in:
adnano 2024-05-02 17:03:07 -04:00
parent 6a39269d2e
commit 6284eea24b
7 changed files with 577 additions and 508 deletions

329
main.c
View file

@ -1,329 +1,24 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <stdbool.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/timerfd.h>
#include <wayland-client.h>
#include <wayland-client-protocol.h>
#include <xkbcommon/xkbcommon.h>
#include "menu.h"
#include "render.h"
#include "xdg-activation-v1-client-protocol.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
#include "wayland.h"
static void noop() {
// Do nothing
}
static void surface_enter(void *data, struct wl_surface *surface, struct wl_output *wl_output) {
struct menu *menu = data;
menu->output = wl_output_get_user_data(wl_output);
}
static const struct wl_surface_listener surface_listener = {
.enter = surface_enter,
.leave = noop,
};
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t width, uint32_t height) {
struct menu *menu = data;
menu->width = width;
menu->height = height;
zwlr_layer_surface_v1_ack_configure(surface, serial);
}
static void layer_surface_closed(void *data, struct zwlr_layer_surface_v1 *surface) {
struct menu *menu = data;
menu->exit = true;
}
static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
static void output_scale(void *data, struct wl_output *wl_output, int32_t factor) {
struct output *output = data;
output->scale = factor;
}
static void output_name(void *data, struct wl_output *wl_output, const char *name) {
struct output *output = data;
output->name = name;
struct menu *menu = output->menu;
if (menu->output_name && strcmp(menu->output_name, name) == 0) {
menu->output = output;
static void read_items(struct menu *menu) {
char buf[sizeof menu->input];
while (fgets(buf, sizeof buf, stdin)) {
char *p = strchr(buf, '\n');
if (p) {
*p = '\0';
}
menu_add_item(menu, strdup(buf));
}
}
static const struct wl_output_listener output_listener = {
.geometry = noop,
.mode = noop,
.done = noop,
.scale = output_scale,
.name = output_name,
.description = noop,
};
static void keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int32_t fd, uint32_t size) {
struct keyboard *keyboard = data;
assert(format == WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1);
char *map_shm = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
assert(map_shm != MAP_FAILED);
keyboard->keymap = xkb_keymap_new_from_string(keyboard->context,
map_shm, XKB_KEYMAP_FORMAT_TEXT_V1, 0);
munmap(map_shm, size);
close(fd);
keyboard->state = xkb_state_new(keyboard->keymap);
}
static void keyboard_repeat(struct keyboard *keyboard) {
menu_keypress(keyboard->menu, keyboard->repeat_key_state, keyboard->repeat_sym);
struct itimerspec spec = { 0 };
spec.it_value.tv_sec = keyboard->repeat_period / 1000;
spec.it_value.tv_nsec = (keyboard->repeat_period % 1000) * 1000000l;
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
}
static void keyboard_key(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t time, uint32_t key, uint32_t _key_state) {
struct keyboard *keyboard = data;
enum wl_keyboard_key_state key_state = _key_state;
xkb_keysym_t sym = xkb_state_key_get_one_sym(keyboard->state, key + 8);
menu_keypress(keyboard->menu, key_state, sym);
if (key_state == WL_KEYBOARD_KEY_STATE_PRESSED && keyboard->repeat_period >= 0) {
keyboard->repeat_key_state = key_state;
keyboard->repeat_sym = sym;
struct itimerspec spec = { 0 };
spec.it_value.tv_sec = keyboard->repeat_delay / 1000;
spec.it_value.tv_nsec = (keyboard->repeat_delay % 1000) * 1000000l;
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
} else if (key_state == WL_KEYBOARD_KEY_STATE_RELEASED) {
struct itimerspec spec = { 0 };
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
}
}
static void keyboard_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
int32_t rate, int32_t delay) {
struct keyboard *keyboard = data;
keyboard->repeat_delay = delay;
if (rate > 0) {
keyboard->repeat_period = 1000 / rate;
} else {
keyboard->repeat_period = -1;
}
}
static void keyboard_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) {
struct keyboard *keyboard = data;
xkb_state_update_mask(keyboard->state, mods_depressed, mods_latched,
mods_locked, 0, 0, group);
}
static const struct wl_keyboard_listener keyboard_listener = {
.keymap = keyboard_keymap,
.enter = noop,
.leave = noop,
.key = keyboard_key,
.modifiers = keyboard_modifiers,
.repeat_info = keyboard_repeat_info,
};
static void seat_capabilities(void *data, struct wl_seat *seat,
enum wl_seat_capability caps) {
struct menu *menu = data;
if (caps & WL_SEAT_CAPABILITY_KEYBOARD) {
struct wl_keyboard *wl_keyboard = wl_seat_get_keyboard(seat);
struct keyboard *keyboard = keyboard_create(menu, wl_keyboard);
wl_keyboard_add_listener(wl_keyboard, &keyboard_listener, keyboard);
menu_set_keyboard(menu, keyboard);
}
}
static const struct wl_seat_listener seat_listener = {
.capabilities = seat_capabilities,
.name = noop,
};
static void data_device_selection(void *data, struct wl_data_device *data_device,
struct wl_data_offer *data_offer) {
struct menu *menu = data;
menu->data_offer = data_offer;
}
static const struct wl_data_device_listener data_device_listener = {
.data_offer = noop,
.enter = noop,
.leave = noop,
.motion = noop,
.drop = noop,
.selection = data_device_selection,
};
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct menu *menu = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
menu->compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 4);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
menu->shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
menu->seat = wl_registry_bind(registry, name, &wl_seat_interface, 4);
wl_seat_add_listener(menu->seat, &seat_listener, menu);
} else if (strcmp(interface, wl_data_device_manager_interface.name) == 0) {
menu->data_device_manager = wl_registry_bind(registry, name, &wl_data_device_manager_interface, 3);
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
menu->layer_shell = wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, 1);
} else if (strcmp(interface, wl_output_interface.name) == 0) {
struct wl_output *wl_output = wl_registry_bind(registry, name, &wl_output_interface, 4);
struct output *output = output_create(menu, wl_output);
wl_output_set_user_data(wl_output, output);
wl_output_add_listener(wl_output, &output_listener, output);
menu_add_output(menu, output);
} else if (strcmp(interface, xdg_activation_v1_interface.name) == 0) {
menu->activation = wl_registry_bind(registry, name, &xdg_activation_v1_interface, 1);
}
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = noop,
};
// Connect to the Wayland display.
static void menu_connect(struct menu *menu) {
menu->display = wl_display_connect(NULL);
if (!menu->display) {
fprintf(stderr, "Failed to connect to display.\n");
exit(EXIT_FAILURE);
}
struct wl_registry *registry = wl_display_get_registry(menu->display);
wl_registry_add_listener(registry, &registry_listener, menu);
wl_display_roundtrip(menu->display);
assert(menu->compositor != NULL);
assert(menu->shm != NULL);
assert(menu->seat != NULL);
assert(menu->data_device_manager != NULL);
assert(menu->layer_shell != NULL);
assert(menu->activation != NULL);
menu->registry = registry;
// Get data device for seat
struct wl_data_device *data_device = wl_data_device_manager_get_data_device(
menu->data_device_manager, menu->seat);
wl_data_device_add_listener(data_device, &data_device_listener, menu);
menu->data_device = data_device;
// Second roundtrip for seat and output listeners
wl_display_roundtrip(menu->display);
assert(menu->keyboard != NULL);
if (menu->output_name && !menu->output) {
fprintf(stderr, "Output %s not found\n", menu->output_name);
exit(EXIT_FAILURE);
}
menu->surface = wl_compositor_create_surface(menu->compositor);
wl_surface_add_listener(menu->surface, &surface_listener, menu);
struct zwlr_layer_surface_v1 *layer_surface = zwlr_layer_shell_v1_get_layer_surface(
menu->layer_shell,
menu->surface,
menu->output ? menu->output->output : NULL,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
"menu"
);
assert(layer_surface != NULL);
menu->layer_surface = layer_surface;
uint32_t anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
if (menu->bottom) {
anchor |= ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
} else {
anchor |= ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP;
}
zwlr_layer_surface_v1_set_anchor(layer_surface, anchor);
zwlr_layer_surface_v1_set_size(layer_surface, 0, menu->height);
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, menu);
wl_surface_commit(menu->surface);
wl_display_roundtrip(menu->display);
}
int main(int argc, char *argv[]) {
struct menu *menu = menu_create();
menu_getopts(menu, argc, argv);
menu_connect(menu);
render_menu(menu);
read_menu_items(menu);
render_menu(menu);
struct pollfd fds[] = {
{ wl_display_get_fd(menu->display), POLLIN },
{ menu->keyboard->repeat_timer, POLLIN },
};
const size_t nfds = sizeof(fds) / sizeof(*fds);
while (!menu->exit) {
errno = 0;
do {
if (wl_display_flush(menu->display) == -1 && errno != EAGAIN) {
fprintf(stderr, "wl_display_flush: %s\n", strerror(errno));
break;
}
} while (errno == EAGAIN);
if (poll(fds, nfds, -1) < 0) {
fprintf(stderr, "poll: %s\n", strerror(errno));
break;
}
if (fds[0].revents & POLLIN) {
if (wl_display_dispatch(menu->display) < 0) {
menu->exit = true;
}
}
if (fds[1].revents & POLLIN) {
keyboard_repeat(menu->keyboard);
}
if (!menu->passwd) {
read_items(menu);
}
bool failure = menu->failure;
menu_destroy(menu);
if (failure) {
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
return menu_run(menu);
}

179
menu.c
View file

@ -1,5 +1,4 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <ctype.h>
#include <poll.h>
#include <stdbool.h>
@ -19,10 +18,8 @@
#include "menu.h"
#include "pango.h"
#include "pool-buffer.h"
#include "render.h"
#include "xdg-activation-v1-client-protocol.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
#include "wayland.h"
// Creates and returns a new menu.
struct menu *menu_create() {
@ -38,38 +35,6 @@ struct menu *menu_create() {
return menu;
}
// Creates and returns a new keyboard.
struct keyboard *keyboard_create(struct menu *menu, struct wl_keyboard *wl_keyboard) {
struct keyboard *keyboard = calloc(1, sizeof(struct keyboard));
keyboard->menu = menu;
keyboard->keyboard = wl_keyboard;
keyboard->context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
assert(keyboard->context != NULL);
keyboard->repeat_timer = timerfd_create(CLOCK_MONOTONIC, 0);
assert(keyboard->repeat_timer != -1);
return keyboard;
}
// Sets the current keyboard.
void menu_set_keyboard(struct menu *menu, struct keyboard *keyboard) {
menu->keyboard = keyboard;
}
// Creates and returns a new output.
struct output *output_create(struct menu *menu, struct wl_output *wl_output) {
struct output *output = calloc(1, sizeof(struct output));
output->menu = menu;
output->output = wl_output;
output->scale = 1;
return output;
}
// Adds an output to the output list.
void menu_add_output(struct menu *menu, struct output *output) {
output->next = menu->output_list;
menu->output_list = output;
}
static bool parse_color(const char *color, uint32_t *result) {
if (color[0] == '#') {
++color;
@ -170,6 +135,22 @@ void menu_getopts(struct menu *menu, int argc, char *argv[]) {
menu->padding = height / 2;
}
// Add an item to the menu.
void menu_add_item(struct menu *menu, char *text) {
struct item *item = calloc(1, sizeof *item);
if (!item) {
return;
}
item->text = text;
if (menu->lastitem) {
menu->lastitem->next = item;
} else {
menu->items = item;
}
menu->lastitem = item;
}
static void append_page(struct page *page, struct page **first, struct page **last) {
if (*last) {
(*last)->next = page;
@ -246,7 +227,7 @@ static const char *fstrstr(struct menu *menu, const char *s, const char *sub) {
return NULL;
}
static void append_item(struct item *item, struct item **first, struct item **last) {
static void append_match(struct item *item, struct item **first, struct item **last) {
if (*last) {
(*last)->next_match = item;
} else {
@ -300,11 +281,11 @@ static void match_items(struct menu *menu) {
continue;
}
if (!tokc || !menu->strncmp(menu->input, item->text, input_len + 1)) {
append_item(item, &lexact, &exactend);
append_match(item, &lexact, &exactend);
} else if (!menu->strncmp(tokv[0], item->text, tok_len)) {
append_item(item, &lprefix, &prefixend);
append_match(item, &lprefix, &prefixend);
} else {
append_item(item, &lsubstr, &substrend);
append_match(item, &lsubstr, &substrend);
}
}
@ -339,45 +320,27 @@ static void match_items(struct menu *menu) {
}
}
// Read menu items from standard input.
void read_menu_items(struct menu *menu) {
if (menu->passwd) {
// Don't read standard input in password mode
calc_widths(menu);
return;
}
char buf[sizeof menu->input];
struct item **next = &menu->items;
while (fgets(buf, sizeof buf, stdin)) {
char *p = strchr(buf, '\n');
if (p) {
*p = '\0';
}
struct item *item = calloc(1, sizeof *item);
if (!item) {
return;
}
item->text = strdup(buf);
*next = item;
next = &item->next;
}
// Process menu items.
void menu_process_items(struct menu *menu) {
calc_widths(menu);
match_items(menu);
}
static void insert(struct menu *menu, const char *s, ssize_t n) {
if (strlen(menu->input) + n > sizeof menu->input - 1) {
static void insert(struct menu *menu, const char *text, ssize_t len) {
if (strlen(menu->input) + len > sizeof menu->input - 1) {
return;
}
memmove(menu->input + menu->cursor + n, menu->input + menu->cursor,
sizeof menu->input - menu->cursor - MAX(n, 0));
if (n > 0 && s != NULL) {
memcpy(menu->input + menu->cursor, s, n);
memmove(menu->input + menu->cursor + len, menu->input + menu->cursor,
sizeof menu->input - menu->cursor - MAX(len, 0));
if (len > 0 && text != NULL) {
memcpy(menu->input + menu->cursor, text, len);
}
menu->cursor += n;
menu->cursor += len;
}
// Add pasted text to the menu input.
void menu_paste(struct menu *menu, const char *text, ssize_t len) {
insert(menu, text, len);
}
static size_t nextrune(struct menu *menu, int incr) {
@ -417,14 +380,12 @@ void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
return;
}
bool ctrl = xkb_state_mod_name_is_active(menu->keyboard->state,
XKB_MOD_NAME_CTRL,
struct xkb_state *state = context_get_xkb_state(menu->context);
bool ctrl = xkb_state_mod_name_is_active(state, XKB_MOD_NAME_CTRL,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
bool meta = xkb_state_mod_name_is_active(menu->keyboard->state,
XKB_MOD_NAME_ALT,
bool meta = xkb_state_mod_name_is_active(state, XKB_MOD_NAME_ALT,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
bool shift = xkb_state_mod_name_is_active(menu->keyboard->state,
XKB_MOD_NAME_SHIFT,
bool shift = xkb_state_mod_name_is_active(state, XKB_MOD_NAME_SHIFT,
XKB_STATE_MODS_DEPRESSED | XKB_STATE_MODS_LATCHED);
size_t len = strlen(menu->input);
@ -501,32 +462,9 @@ void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
return;
case XKB_KEY_Y:
// Paste clipboard
if (!menu->data_offer) {
if (!context_paste(menu->context)) {
return;
}
int fds[2];
if (pipe(fds) == -1) {
// Pipe failed
return;
}
wl_data_offer_receive(menu->data_offer, "text/plain", fds[1]);
close(fds[1]);
wl_display_roundtrip(menu->display);
while (true) {
char buf[1024];
ssize_t n = read(fds[0], buf, sizeof(buf));
if (n <= 0) {
break;
}
insert(menu, buf, n);
}
close(fds[0]);
wl_data_offer_destroy(menu->data_offer);
menu->data_offer = NULL;
match_items(menu);
render_menu(menu);
return;
@ -696,26 +634,6 @@ void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
}
}
// Frees the keyboard.
static void free_keyboard(struct keyboard *keyboard) {
wl_keyboard_release(keyboard->keyboard);
xkb_state_unref(keyboard->state);
xkb_keymap_unref(keyboard->keymap);
xkb_context_unref(keyboard->context);
free(keyboard);
}
// Frees the outputs.
static void free_outputs(struct menu *menu) {
struct output *next = menu->output_list;
while (next) {
struct output *output = next;
next = output->next;
wl_output_destroy(output->output);
free(output);
}
}
// Frees menu pages.
static void free_pages(struct menu *menu) {
struct page *next = menu->pages;
@ -739,26 +657,9 @@ static void free_items(struct menu *menu) {
// Destroys the menu, freeing memory associated with it.
void menu_destroy(struct menu *menu) {
wl_registry_destroy(menu->registry);
wl_compositor_destroy(menu->compositor);
wl_shm_destroy(menu->shm);
wl_seat_destroy(menu->seat);
wl_data_device_manager_destroy(menu->data_device_manager);
zwlr_layer_shell_v1_destroy(menu->layer_shell);
free_outputs(menu);
free_keyboard(menu->keyboard);
wl_data_device_destroy(menu->data_device);
wl_surface_destroy(menu->surface);
zwlr_layer_surface_v1_destroy(menu->layer_surface);
xdg_activation_v1_destroy(menu->activation);
free_pages(menu);
free_items(menu);
destroy_buffer(&menu->buffers[0]);
destroy_buffer(&menu->buffers[1]);
wl_display_disconnect(menu->display);
free(menu);
}

51
menu.h
View file

@ -4,7 +4,6 @@
#include <xkbcommon/xkbcommon.h>
#include "pool-buffer.h"
#include "xdg-activation-v1-client-protocol.h"
// A menu item.
struct item {
@ -24,30 +23,6 @@ struct page {
struct page *next; // next page
};
// A Wayland output.
struct output {
struct menu *menu;
struct wl_output *output;
const char *name; // output name
int32_t scale; // output scale
struct output *next; // next output
};
// Keyboard state.
struct keyboard {
struct menu *menu;
struct wl_keyboard *keyboard;
struct xkb_context *context;
struct xkb_keymap *keymap;
struct xkb_state *state;
int repeat_timer;
int repeat_delay;
int repeat_period;
enum wl_keyboard_key_state repeat_key_state;
xkb_keysym_t repeat_sym;
};
// Menu state.
struct menu {
// Whether the menu appears at the bottom of the screen
@ -71,22 +46,7 @@ struct menu {
// Selection colors
uint32_t selectionbg, selectionfg;
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct wl_shm *shm;
struct wl_seat *seat;
struct wl_data_device_manager *data_device_manager;
struct zwlr_layer_shell_v1 *layer_shell;
struct output *output_list;
struct xdg_activation_v1 *activation;
struct keyboard *keyboard;
struct wl_data_device *data_device;
struct wl_surface *surface;
struct zwlr_layer_surface_v1 *layer_surface;
struct wl_data_offer *data_offer;
struct output *output;
struct wl_context *context;
struct pool_buffer buffers[2];
struct pool_buffer *current;
@ -104,6 +64,7 @@ struct menu {
size_t cursor;
struct item *items; // list of all items
struct item *lastitem; // last item in the list
struct item *matches; // list of matching items
struct item *matches_end; // last matching item
struct item *sel; // selected item
@ -114,12 +75,10 @@ struct menu {
};
struct menu *menu_create();
struct keyboard *keyboard_create(struct menu *menu, struct wl_keyboard *wl_keyboard);
void menu_set_keyboard(struct menu *menu, struct keyboard *keyboard);
struct output *output_create(struct menu *menu, struct wl_output *wl_output);
void menu_add_output(struct menu *menu, struct output *output);
void menu_getopts(struct menu *menu, int argc, char *argv[]);
void read_menu_items(struct menu *menu);
void menu_add_item(struct menu *menu, char *text);
void menu_process_items(struct menu *menu);
void menu_paste(struct menu *menu, const char *text, ssize_t len);
void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
xkb_keysym_t sym);
void menu_destroy(struct menu *menu);

1
meson.build
View file

@ -43,6 +43,7 @@ executable(
'pango.c',
'pool-buffer.c',
'render.c',
'wayland.c',
),
dependencies: [
cairo,

16
render.c
View file

@ -7,6 +7,7 @@
#include "menu.h"
#include "pango.h"
#include "wayland.h"
// Calculate text widths.
void calc_widths(struct menu *menu) {
@ -177,6 +178,8 @@ static void render_to_cairo(struct menu *menu, cairo_t *cairo) {
// Renders a single frame of the menu.
void render_menu(struct menu *menu) {
struct wl_context *context = menu->context;
cairo_surface_t *recorder = cairo_recording_surface_create(
CAIRO_CONTENT_COLOR_ALPHA, NULL);
cairo_t *cairo = cairo_create(recorder);
@ -191,8 +194,8 @@ void render_menu(struct menu *menu) {
render_to_cairo(menu, cairo);
int scale = menu->output ? menu->output->scale : 1;
menu->current = get_next_buffer(menu->shm,
int scale = context_get_scale(context);
menu->current = get_next_buffer(context_get_shm(context),
menu->buffers, menu->width, menu->height, scale);
if (!menu->current) {
goto cleanup;
@ -206,10 +209,11 @@ void render_menu(struct menu *menu) {
cairo_set_source_surface(shm, recorder, 0, 0);
cairo_paint(shm);
wl_surface_set_buffer_scale(menu->surface, scale);
wl_surface_attach(menu->surface, menu->current->buffer, 0, 0);
wl_surface_damage(menu->surface, 0, 0, menu->width, menu->height);
wl_surface_commit(menu->surface);
struct wl_surface *surface = context_get_surface(context);
wl_surface_set_buffer_scale(surface, scale);
wl_surface_attach(surface, menu->current->buffer, 0, 0);
wl_surface_damage(surface, 0, 0, menu->width, menu->height);
wl_surface_commit(surface);
cleanup:
cairo_destroy(cairo);

492
wayland.c Normal file
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@ -0,0 +1,492 @@
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <stdbool.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/timerfd.h>
#include <wayland-client.h>
#include <wayland-client-protocol.h>
#include <xkbcommon/xkbcommon.h>
#include "menu.h"
#include "render.h"
#include "wayland.h"
#include "xdg-activation-v1-client-protocol.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
// A Wayland output.
struct output {
struct wl_context *context;
struct wl_output *output;
const char *name; // output name
int32_t scale; // output scale
struct output *next; // next output
};
// Creates and returns a new output.
static struct output *output_create(struct wl_context *context, struct wl_output *wl_output) {
struct output *output = calloc(1, sizeof(struct output));
output->context = context;
output->output = wl_output;
output->scale = 1;
return output;
}
// Keyboard state.
struct keyboard {
struct menu *menu;
struct wl_keyboard *keyboard;
struct xkb_context *context;
struct xkb_keymap *keymap;
struct xkb_state *state;
int repeat_timer;
int repeat_delay;
int repeat_period;
enum wl_keyboard_key_state repeat_key_state;
xkb_keysym_t repeat_sym;
};
// Creates and returns a new keyboard.
static struct keyboard *keyboard_create(struct menu *menu, struct wl_keyboard *wl_keyboard) {
struct keyboard *keyboard = calloc(1, sizeof(struct keyboard));
keyboard->menu = menu;
keyboard->keyboard = wl_keyboard;
keyboard->context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
assert(keyboard->context != NULL);
keyboard->repeat_timer = timerfd_create(CLOCK_MONOTONIC, 0);
assert(keyboard->repeat_timer != -1);
return keyboard;
}
// Frees the keyboard.
static void free_keyboard(struct keyboard *keyboard) {
wl_keyboard_release(keyboard->keyboard);
xkb_state_unref(keyboard->state);
xkb_keymap_unref(keyboard->keymap);
xkb_context_unref(keyboard->context);
free(keyboard);
}
// Wayland context.
struct wl_context {
struct menu *menu;
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
struct wl_shm *shm;
struct wl_seat *seat;
struct wl_data_device_manager *data_device_manager;
struct zwlr_layer_shell_v1 *layer_shell;
struct output *output_list;
struct xdg_activation_v1 *activation;
struct keyboard *keyboard;
struct wl_data_device *data_device;
struct wl_surface *surface;
struct zwlr_layer_surface_v1 *layer_surface;
struct wl_data_offer *data_offer;
struct output *output;
};
// Returns the current output_scale.
int context_get_scale(struct wl_context *context) {
return context->output ? context->output->scale : 1;
}
// Returns the shared memory for the context.
struct wl_shm *context_get_shm(struct wl_context *context) {
return context->shm;
}
// Returns the Wayland surface for the context.
struct wl_surface *context_get_surface(struct wl_context *context) {
return context->surface;
}
// Returns the XKB state for the context.
struct xkb_state *context_get_xkb_state(struct wl_context *context) {
return context->keyboard->state;
}
// Retrieves pasted text from a Wayland data offer.
bool context_paste(struct wl_context *context) {
if (!context->data_offer) {
return false;
}
int fds[2];
if (pipe(fds) == -1) {
// Pipe failed
return false;
}
wl_data_offer_receive(context->data_offer, "text/plain", fds[1]);
close(fds[1]);
wl_display_roundtrip(context->display);
while (true) {
char buf[1024];
ssize_t n = read(fds[0], buf, sizeof(buf));
if (n <= 0) {
break;
}
menu_paste(context->menu, buf, n);
}
close(fds[0]);
wl_data_offer_destroy(context->data_offer);
context->data_offer = NULL;
return true;
}
// Adds an output to the output list.
static void context_add_output(struct wl_context *context, struct output *output) {
output->next = context->output_list;
context->output_list = output;
}
// Frees the outputs.
static void free_outputs(struct wl_context *context) {
struct output *next = context->output_list;
while (next) {
struct output *output = next;
next = output->next;
wl_output_destroy(output->output);
free(output);
}
}
// Destroys the Wayland context, freeing memory associated with it.
static void context_destroy(struct wl_context *context) {
wl_registry_destroy(context->registry);
wl_compositor_destroy(context->compositor);
wl_shm_destroy(context->shm);
wl_seat_destroy(context->seat);
wl_data_device_manager_destroy(context->data_device_manager);
zwlr_layer_shell_v1_destroy(context->layer_shell);
free_outputs(context);
free_keyboard(context->keyboard);
wl_data_device_destroy(context->data_device);
wl_surface_destroy(context->surface);
zwlr_layer_surface_v1_destroy(context->layer_surface);
xdg_activation_v1_destroy(context->activation);
wl_display_disconnect(context->display);
free(context);
}
static void noop() {
// Do nothing
}
static void surface_enter(void *data, struct wl_surface *surface, struct wl_output *wl_output) {
struct wl_context *context = data;
context->output = wl_output_get_user_data(wl_output);
}
static const struct wl_surface_listener surface_listener = {
.enter = surface_enter,
.leave = noop,
};
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t width, uint32_t height) {
struct wl_context *context = data;
context->menu->width = width;
context->menu->height = height;
zwlr_layer_surface_v1_ack_configure(surface, serial);
}
static void layer_surface_closed(void *data, struct zwlr_layer_surface_v1 *surface) {
struct wl_context *context = data;
context->menu->exit = true;
}
static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
static void output_scale(void *data, struct wl_output *wl_output, int32_t factor) {
struct output *output = data;
output->scale = factor;
}
static void output_name(void *data, struct wl_output *wl_output, const char *name) {
struct output *output = data;
output->name = name;
struct wl_context *context = output->context;
if (context->menu->output_name && strcmp(context->menu->output_name, name) == 0) {
context->output = output;
}
}
static const struct wl_output_listener output_listener = {
.geometry = noop,
.mode = noop,
.done = noop,
.scale = output_scale,
.name = output_name,
.description = noop,
};
static void keyboard_keymap(void *data, struct wl_keyboard *wl_keyboard,
uint32_t format, int32_t fd, uint32_t size) {
struct keyboard *keyboard = data;
assert(format == WL_KEYBOARD_KEYMAP_FORMAT_XKB_V1);
char *map_shm = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
assert(map_shm != MAP_FAILED);
keyboard->keymap = xkb_keymap_new_from_string(keyboard->context,
map_shm, XKB_KEYMAP_FORMAT_TEXT_V1, 0);
munmap(map_shm, size);
close(fd);
keyboard->state = xkb_state_new(keyboard->keymap);
}
static void keyboard_repeat(struct keyboard *keyboard) {
menu_keypress(keyboard->menu, keyboard->repeat_key_state, keyboard->repeat_sym);
struct itimerspec spec = { 0 };
spec.it_value.tv_sec = keyboard->repeat_period / 1000;
spec.it_value.tv_nsec = (keyboard->repeat_period % 1000) * 1000000l;
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
}
static void keyboard_key(void *data, struct wl_keyboard *wl_keyboard,
uint32_t serial, uint32_t time, uint32_t key, uint32_t _key_state) {
struct keyboard *keyboard = data;
enum wl_keyboard_key_state key_state = _key_state;
xkb_keysym_t sym = xkb_state_key_get_one_sym(keyboard->state, key + 8);
menu_keypress(keyboard->menu, key_state, sym);
if (key_state == WL_KEYBOARD_KEY_STATE_PRESSED && keyboard->repeat_period >= 0) {
keyboard->repeat_key_state = key_state;
keyboard->repeat_sym = sym;
struct itimerspec spec = { 0 };
spec.it_value.tv_sec = keyboard->repeat_delay / 1000;
spec.it_value.tv_nsec = (keyboard->repeat_delay % 1000) * 1000000l;
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
} else if (key_state == WL_KEYBOARD_KEY_STATE_RELEASED) {
struct itimerspec spec = { 0 };
timerfd_settime(keyboard->repeat_timer, 0, &spec, NULL);
}
}
static void keyboard_repeat_info(void *data, struct wl_keyboard *wl_keyboard,
int32_t rate, int32_t delay) {
struct keyboard *keyboard = data;
keyboard->repeat_delay = delay;
if (rate > 0) {
keyboard->repeat_period = 1000 / rate;
} else {
keyboard->repeat_period = -1;
}
}
static void keyboard_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) {
struct keyboard *keyboard = data;
xkb_state_update_mask(keyboard->state, mods_depressed, mods_latched,
mods_locked, 0, 0, group);
}
static const struct wl_keyboard_listener keyboard_listener = {
.keymap = keyboard_keymap,
.enter = noop,
.leave = noop,
.key = keyboard_key,
.modifiers = keyboard_modifiers,
.repeat_info = keyboard_repeat_info,
};
static void seat_capabilities(void *data, struct wl_seat *seat,
enum wl_seat_capability caps) {
struct wl_context *context = data;
if (caps & WL_SEAT_CAPABILITY_KEYBOARD) {
struct wl_keyboard *wl_keyboard = wl_seat_get_keyboard(seat);
struct keyboard *keyboard = keyboard_create(context->menu, wl_keyboard);
wl_keyboard_add_listener(wl_keyboard, &keyboard_listener, keyboard);
context->keyboard = keyboard;
}
}
static const struct wl_seat_listener seat_listener = {
.capabilities = seat_capabilities,
.name = noop,
};
static void data_device_selection(void *data, struct wl_data_device *data_device,
struct wl_data_offer *data_offer) {
struct wl_context *context = data;
context->data_offer = data_offer;
}
static const struct wl_data_device_listener data_device_listener = {
.data_offer = noop,
.enter = noop,
.leave = noop,
.motion = noop,
.drop = noop,
.selection = data_device_selection,
};
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct wl_context *context = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
context->compositor = wl_registry_bind(registry, name, &wl_compositor_interface, 4);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
context->shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
context->seat = wl_registry_bind(registry, name, &wl_seat_interface, 4);
wl_seat_add_listener(context->seat, &seat_listener, data);
} else if (strcmp(interface, wl_data_device_manager_interface.name) == 0) {
context->data_device_manager = wl_registry_bind(registry, name, &wl_data_device_manager_interface, 3);
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
context->layer_shell = wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, 1);
} else if (strcmp(interface, wl_output_interface.name) == 0) {
struct wl_output *wl_output = wl_registry_bind(registry, name, &wl_output_interface, 4);
struct output *output = output_create(context, wl_output);
wl_output_set_user_data(wl_output, output);
wl_output_add_listener(wl_output, &output_listener, output);
context_add_output(context, output);
} else if (strcmp(interface, xdg_activation_v1_interface.name) == 0) {
context->activation = wl_registry_bind(registry, name, &xdg_activation_v1_interface, 1);
}
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = noop,
};
// Connect to the Wayland display and run the menu.
int menu_run(struct menu *menu) {
struct wl_context *context = calloc(1, sizeof(struct wl_context));
context->menu = menu;
menu->context = context;
context->display = wl_display_connect(NULL);
if (!context->display) {
fprintf(stderr, "Failed to connect to display.\n");
exit(EXIT_FAILURE);
}
struct wl_registry *registry = wl_display_get_registry(context->display);
wl_registry_add_listener(registry, &registry_listener, context);
wl_display_roundtrip(context->display);
assert(context->compositor != NULL);
assert(context->shm != NULL);
assert(context->seat != NULL);
assert(context->data_device_manager != NULL);
assert(context->layer_shell != NULL);
assert(context->activation != NULL);
context->registry = registry;
// Get data device for seat
struct wl_data_device *data_device = wl_data_device_manager_get_data_device(
context->data_device_manager, context->seat);
wl_data_device_add_listener(data_device, &data_device_listener, context);
context->data_device = data_device;
// Second roundtrip for seat and output listeners
wl_display_roundtrip(context->display);
assert(context->keyboard != NULL);
if (menu->output_name && !context->output) {
fprintf(stderr, "Output %s not found\n", menu->output_name);
exit(EXIT_FAILURE);
}
context->surface = wl_compositor_create_surface(context->compositor);
wl_surface_add_listener(context->surface, &surface_listener, context);
struct zwlr_layer_surface_v1 *layer_surface = zwlr_layer_shell_v1_get_layer_surface(
context->layer_shell,
context->surface,
context->output ? context->output->output : NULL,
ZWLR_LAYER_SHELL_V1_LAYER_TOP,
"menu"
);
assert(layer_surface != NULL);
context->layer_surface = layer_surface;
uint32_t anchor = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
if (menu->bottom) {
anchor |= ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM;
} else {
anchor |= ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP;
}
zwlr_layer_surface_v1_set_anchor(layer_surface, anchor);
zwlr_layer_surface_v1_set_size(layer_surface, 0, menu->height);
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, context);
wl_surface_commit(context->surface);
wl_display_roundtrip(context->display);
render_menu(menu);
menu_process_items(menu);
render_menu(menu);
struct pollfd fds[] = {
{ wl_display_get_fd(context->display), POLLIN },
{ context->keyboard->repeat_timer, POLLIN },
};
const size_t nfds = sizeof(fds) / sizeof(*fds);
while (!menu->exit) {
errno = 0;
do {
if (wl_display_flush(context->display) == -1 && errno != EAGAIN) {
fprintf(stderr, "wl_display_flush: %s\n", strerror(errno));
break;
}
} while (errno == EAGAIN);
if (poll(fds, nfds, -1) < 0) {
fprintf(stderr, "poll: %s\n", strerror(errno));
break;
}
if (fds[0].revents & POLLIN) {
if (wl_display_dispatch(context->display) < 0) {
menu->exit = true;
}
}
if (fds[1].revents & POLLIN) {
keyboard_repeat(context->keyboard);
}
}
bool failure = menu->failure;
menu_destroy(menu);
context_destroy(context);
if (failure) {
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}

17
wayland.h Normal file
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@ -0,0 +1,17 @@
#ifndef WMENU_WAYLAND_H
#define WMENU_WAYLAND_H
#include "menu.h"
#include <wayland-client-protocol.h>
struct wl_context;
int menu_run(struct menu *menu);
int context_get_scale(struct wl_context *context);
struct wl_shm *context_get_shm(struct wl_context *context);
struct wl_surface *context_get_surface(struct wl_context *context);
struct xkb_state *context_get_xkb_state(struct wl_context *context);
bool context_paste(struct wl_context *context);
#endif