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Code Issues
bemenu/lib/renderers/wayland/wayland.c
Dominique Martinet 992e5add42 wayland renderer: Implement grab_keyboard 
This avoids locking oneself out when running bemenu interactively,
as input would be grabbed too early without that and layer shell
does not allow to 'ungrab' focus by clicking on another window
2018-04-29 20:50:55 +09:00

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8.6 KiB
C
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#include "internal.h"
#include "version.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 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) {
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_render(window, wayland->display, menu);
}
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;
switch (sym) {
case XKB_KEY_Up:
return BM_KEY_UP;
case XKB_KEY_Down:
return BM_KEY_DOWN;
case XKB_KEY_Left:
return BM_KEY_LEFT;
case XKB_KEY_Right:
return 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_Return:
return (mods & MOD_CTRL ? BM_KEY_CONTROL_RETURN : (mods & MOD_SHIFT ? BM_KEY_SHIFT_RETURN : BM_KEY_RETURN));
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);
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
destructor(struct bm_menu *menu)
{
struct wayland *wayland = menu->renderer->internal;
if (!wayland)
return;
struct window *window;
wl_list_for_each(window, &wayland->windows, link) {
bm_wl_window_destroy(window);
}
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;
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;
struct output *output;
wl_list_for_each(output, &wayland->outputs, link) {
struct wl_surface *surface;
if (!(surface = wl_compositor_create_surface(wayland->compositor)))
goto fail;
struct window *window = calloc(1, sizeof(struct window));
window->bottom = menu->bottom;
if (!bm_wl_window_create(window, wayland->display, wayland->shm, output->output, wayland->layer_shell, surface))
goto fail;
window->notify.render = bm_cairo_paint;
window->max_height = output->height;
wl_list_insert(&wayland->windows, &window->link);
}
if (!efd && (efd = epoll_create(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;
}
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->priorty = BM_PRIO_GUI;
api->version = BM_PLUGIN_VERSION;
return "wayland";
}
/* vim: set ts=8 sw=4 tw=0 :*/
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