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bemenu/lib/renderers/wayland/wayland.c
Sören Tempel 2e922503e8 x11: Align -m argument interpretation with dmenu 
With dmenu, monitor indices start at 0 and a value of -1 (the default)
is used to spawn dmenu on the current monitor. While bemenu strives to
be compatible with dmenu, bemenu monitor indices previously started at 1
and a value of 0 (the default) was used to spawn on the current monitor.

This commit aligns the behaviour of bemenu's x11 backend with dmenu. For
this purposes, the affected code in the x11 backend is synced with the
current dmenu implementation. While doing so the monitor type has also
been switched from a uint32_t to a int32_t.
2021-04-27 14:24:02 +09:00

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#include "internal.h"
#include "wayland.h"
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/epoll.h>
#include <sys/timerfd.h>
static int efd;
static void
render(const struct bm_menu *menu)
{
struct wayland *wayland = menu->renderer->internal;
wl_display_dispatch_pending(wayland->display);
if (wl_display_flush(wayland->display) < 0 && errno != EAGAIN) {
wayland->input.sym = XKB_KEY_Escape;
return;
}
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
if (window->render_pending)
bm_wl_window_render(window, wayland->display, menu);
}
wl_display_flush(wayland->display);
struct epoll_event ep[16];
uint32_t num = epoll_wait(efd, ep, 16, -1);
for (uint32_t i = 0; i < num; ++i) {
if (ep[i].data.ptr == &wayland->fds.display) {
if (ep[i].events & EPOLLERR || ep[i].events & EPOLLHUP ||
((ep[i].events & EPOLLIN) && wl_display_dispatch(wayland->display) < 0))
wayland->input.sym = XKB_KEY_Escape;
} else if (ep[i].data.ptr == &wayland->fds.repeat) {
bm_wl_repeat(wayland);
}
}
if (wayland->input.code != wayland->input.last_code) {
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_schedule_render(window);
}
wayland->input.last_code = wayland->input.code;
}
}
static enum bm_key
poll_key(const struct bm_menu *menu, unsigned int *unicode)
{
struct wayland *wayland = menu->renderer->internal;
assert(wayland && unicode);
*unicode = 0;
if (wayland->input.sym == XKB_KEY_NoSymbol)
return BM_KEY_UNICODE;
xkb_keysym_t sym = wayland->input.sym;
uint32_t mods = wayland->input.modifiers;
*unicode = xkb_state_key_get_utf32(wayland->input.xkb.state, wayland->input.code);
if (!*unicode && wayland->input.code == 23 && (mods & MOD_SHIFT))
return BM_KEY_SHIFT_TAB;
wayland->input.sym = XKB_KEY_NoSymbol;
wayland->input.code = 0;
if (!wayland->input.key_pending)
return BM_KEY_UNICODE;
wayland->input.key_pending = false;
switch (sym) {
case XKB_KEY_Up:
return BM_KEY_UP;
case XKB_KEY_Down:
return BM_KEY_DOWN;
case XKB_KEY_Left:
return (mods & MOD_SHIFT ? BM_KEY_UP : BM_KEY_LEFT);
case XKB_KEY_Right:
return (mods & MOD_SHIFT ? BM_KEY_DOWN : BM_KEY_RIGHT);
case XKB_KEY_Home:
return BM_KEY_HOME;
case XKB_KEY_End:
return BM_KEY_END;
case XKB_KEY_SunPageUp:
return (mods & MOD_SHIFT ? BM_KEY_SHIFT_PAGE_UP : BM_KEY_PAGE_UP);
case XKB_KEY_less:
return (mods & MOD_ALT ? BM_KEY_SHIFT_PAGE_UP : BM_KEY_UNICODE);
case XKB_KEY_SunPageDown:
return (mods & MOD_SHIFT ? BM_KEY_SHIFT_PAGE_DOWN : BM_KEY_PAGE_DOWN);
case XKB_KEY_greater:
return (mods & MOD_ALT ? BM_KEY_SHIFT_PAGE_DOWN : BM_KEY_UNICODE);
case XKB_KEY_v:
return (mods & MOD_CTRL ? BM_KEY_PAGE_DOWN : (mods & MOD_ALT ? BM_KEY_PAGE_UP : BM_KEY_UNICODE));
case XKB_KEY_BackSpace:
return BM_KEY_BACKSPACE;
case XKB_KEY_Delete:
return (mods & MOD_SHIFT ? BM_KEY_LINE_DELETE_LEFT : BM_KEY_DELETE);
case XKB_KEY_Tab:
return (mods & MOD_SHIFT ? BM_KEY_SHIFT_TAB : BM_KEY_TAB);
case XKB_KEY_Insert:
return BM_KEY_SHIFT_RETURN;
case XKB_KEY_KP_Enter:
case XKB_KEY_Return:
return (mods & MOD_CTRL ? BM_KEY_CONTROL_RETURN : (mods & MOD_SHIFT ? BM_KEY_SHIFT_RETURN : BM_KEY_RETURN));
case XKB_KEY_g:
if (!(mods & MOD_CTRL)) return BM_KEY_UNICODE;
// fall through
case XKB_KEY_bracketleft:
if (!(mods & MOD_CTRL)) return BM_KEY_UNICODE;
// fall through
case XKB_KEY_Escape:
return BM_KEY_ESCAPE;
case XKB_KEY_p:
return (mods & MOD_CTRL ? BM_KEY_UP : BM_KEY_UNICODE);
case XKB_KEY_n:
return (mods & MOD_CTRL ? BM_KEY_DOWN : BM_KEY_UNICODE);
case XKB_KEY_l:
return (mods & MOD_CTRL ? BM_KEY_LEFT : (mods & MOD_ALT ? BM_KEY_DOWN : BM_KEY_UNICODE));
case XKB_KEY_f:
return (mods & MOD_CTRL ? BM_KEY_RIGHT : BM_KEY_UNICODE);
case XKB_KEY_a:
return (mods & MOD_CTRL ? BM_KEY_HOME : BM_KEY_UNICODE);
case XKB_KEY_e:
return (mods & MOD_CTRL ? BM_KEY_END : BM_KEY_UNICODE);
case XKB_KEY_h:
return (mods & MOD_CTRL ? BM_KEY_BACKSPACE : (mods & MOD_ALT ? BM_KEY_UP : BM_KEY_UNICODE));
case XKB_KEY_u:
return (mods & MOD_CTRL ? BM_KEY_LINE_DELETE_LEFT : (mods & MOD_ALT ? BM_KEY_PAGE_UP : BM_KEY_UNICODE));
case XKB_KEY_k:
return (mods & MOD_CTRL ? BM_KEY_LINE_DELETE_RIGHT : (mods & MOD_ALT ? BM_KEY_UP : BM_KEY_UNICODE));
case XKB_KEY_w:
return (mods & MOD_CTRL ? BM_KEY_WORD_DELETE : BM_KEY_UNICODE);
case XKB_KEY_j:
return (mods & MOD_ALT ? BM_KEY_DOWN : BM_KEY_UNICODE);
case XKB_KEY_d:
return (mods & MOD_ALT ? BM_KEY_PAGE_DOWN : BM_KEY_UNICODE);
case XKB_KEY_m:
return (mods & MOD_CTRL ? BM_KEY_RETURN : BM_KEY_UNICODE);
case XKB_KEY_1:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_1;
break;
case XKB_KEY_2:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_2;
break;
case XKB_KEY_3:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_3;
break;
case XKB_KEY_4:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_4;
break;
case XKB_KEY_5:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_5;
break;
case XKB_KEY_6:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_6;
break;
case XKB_KEY_7:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_7;
break;
case XKB_KEY_8:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_8;
break;
case XKB_KEY_9:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_9;
break;
case XKB_KEY_0:
if ((mods & MOD_ALT)) return BM_KEY_CUSTOM_10;
break;
default: break;
}
return BM_KEY_UNICODE;
}
static uint32_t
get_displayed_count(const struct bm_menu *menu)
{
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
uint32_t max = 0;
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
if (window->displayed > max)
max = window->displayed;
}
return max;
}
static void
set_bottom(const struct bm_menu *menu, bool bottom)
{
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_set_bottom(window, wayland->display, bottom);
}
}
static void
grab_keyboard(const struct bm_menu *menu, bool grab)
{
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_grab_keyboard(window, wayland->display, grab);
}
}
static void
set_overlap(const struct bm_menu *menu, bool overlap)
{
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_set_overlap(window, wayland->display, overlap);
}
}
static void
destroy_windows(struct wayland *wayland)
{
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_destroy(window);
}
wl_list_init(&wayland->windows);
}
static void
recreate_windows(const struct bm_menu *menu, struct wayland *wayland)
{
destroy_windows(wayland);
int32_t monitors = 0;
struct output *output;
wl_list_for_each(output, &wayland->outputs, link)
monitors++;
int32_t monitor = 0;
wl_list_for_each(output, &wayland->outputs, link) {
if (!menu->monitor_name) {
if (menu->monitor != -1) {
if (menu->monitor < monitors && monitor != menu->monitor) {
++monitor;
continue;
}
}
} else if (strcmp(menu->monitor_name, output->name)) {
continue;
}
struct wl_surface *surface;
if (!(surface = wl_compositor_create_surface(wayland->compositor)))
goto fail;
wl_surface_set_buffer_scale(surface, output->scale);
struct window *window = calloc(1, sizeof(struct window));
window->bottom = menu->bottom;
const char *scale = getenv("BEMENU_SCALE");
if (scale) {
window->scale = fmax(strtof(scale, NULL), 1.0f);
} else {
window->scale = output->scale;
}
if (!bm_wl_window_create(window, wayland->display, wayland->shm, output->output, wayland->layer_shell, surface))
free(window);
window->notify.render = bm_cairo_paint;
window->max_height = output->height;
window->render_pending = true;
wl_list_insert(&wayland->windows, &window->link);
if (menu->monitor != -1) break;
}
set_overlap(menu, menu->overlap);
grab_keyboard(menu, menu->grabbed);
return;
fail:
// This is non handlable if fails on recreation
fprintf(stderr, "wayland window creation failed :/\n");
abort();
}
static void
set_monitor(const struct bm_menu *menu, int32_t monitor)
{
(void)monitor;
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
recreate_windows(menu, wayland);
}
static void
set_monitor_name(const struct bm_menu *menu, char *monitor_name)
{
(void)monitor_name;
struct wayland *wayland = menu->renderer->internal;
assert(wayland);
recreate_windows(menu, wayland);
}
static void
destructor(struct bm_menu *menu)
{
struct wayland *wayland = menu->renderer->internal;
if (!wayland)
return;
destroy_windows(wayland);
bm_wl_registry_destroy(wayland);
xkb_context_unref(wayland->input.xkb.context);
if (wayland->display) {
epoll_ctl(efd, EPOLL_CTL_DEL, wayland->fds.repeat, NULL);
epoll_ctl(efd, EPOLL_CTL_DEL, wayland->fds.display, NULL);
close(wayland->fds.repeat);
wl_display_flush(wayland->display);
wl_display_disconnect(wayland->display);
}
free(wayland);
menu->renderer->internal = NULL;
}
static bool
constructor(struct bm_menu *menu)
{
if (!getenv("WAYLAND_DISPLAY") && !getenv("WAYLAND_SOCKET"))
return false;
struct wayland *wayland;
if (!(menu->renderer->internal = wayland = calloc(1, sizeof(struct wayland))))
goto fail;
wl_list_init(&wayland->windows);
wl_list_init(&wayland->outputs);
if (!(wayland->display = wl_display_connect(NULL)))
goto fail;
if (!(wayland->input.xkb.context = xkb_context_new(XKB_CONTEXT_NO_FLAGS)))
goto fail;
if (!bm_wl_registry_register(wayland))
goto fail;
wayland->fds.display = wl_display_get_fd(wayland->display);
wayland->fds.repeat = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK);
wayland->input.repeat_fd = &wayland->fds.repeat;
wayland->input.key_pending = false;
recreate_windows(menu, wayland);
if (!efd && (efd = epoll_create1(EPOLL_CLOEXEC)) < 0)
goto fail;
struct epoll_event ep;
ep.events = EPOLLIN | EPOLLERR | EPOLLHUP;
ep.data.ptr = &wayland->fds.display;
epoll_ctl(efd, EPOLL_CTL_ADD, wayland->fds.display, &ep);
struct epoll_event ep2;
ep2.events = EPOLLIN;
ep2.data.ptr = &wayland->fds.repeat;
epoll_ctl(efd, EPOLL_CTL_ADD, wayland->fds.repeat, &ep2);
return true;
fail:
destructor(menu);
return false;
}
BM_PUBLIC extern const char*
register_renderer(struct render_api *api)
{
api->constructor = constructor;
api->destructor = destructor;
api->get_displayed_count = get_displayed_count;
api->poll_key = poll_key;
api->render = render;
api->set_bottom = set_bottom;
api->grab_keyboard = grab_keyboard;
api->set_overlap = set_overlap;
api->set_monitor = set_monitor;
api->set_monitor_name = set_monitor_name;
api->priorty = BM_PRIO_GUI;
api->version = BM_PLUGIN_VERSION;
return "wayland";
}
/* vim: set ts=8 sw=4 tw=0 :*/
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