A fast, lightweight and minimalistic Wayland terminal emulator
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#include "wayland.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <poll.h>
#include <fcntl.h>
#include <sys/timerfd.h>
#include <sys/epoll.h>
#include <wayland-client.h>
#include <wayland-cursor.h>
#include <xdg-shell.h>
#include <xkbcommon/xkbcommon-compose.h>
#include <tllist.h>
#include <xdg-output-unstable-v1.h>
#include <xdg-decoration-unstable-v1.h>
#define LOG_MODULE "wayland"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "config.h"
#include "terminal.h"
#include "input.h"
#include "render.h"
#include "selection.h"
#define min(x, y) ((x) < (y) ? (x) : (y))
#define max(x, y) ((x) > (y) ? (x) : (y))
static bool wayl_reload_cursor_theme(
struct wayland *wayl, struct terminal *term);
static void
shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct wayland *wayl = data;
if (format == WL_SHM_FORMAT_ARGB8888)
wayl->have_argb8888 = true;
}
static const struct wl_shm_listener shm_listener = {
.format = &shm_format,
};
static void
xdg_wm_base_ping(void *data, struct xdg_wm_base *shell, uint32_t serial)
{
LOG_DBG("wm base ping");
xdg_wm_base_pong(shell, serial);
}
static const struct xdg_wm_base_listener xdg_wm_base_listener = {
.ping = &xdg_wm_base_ping,
};
static void
seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps)
{
struct wayland *wayl = data;
if (wayl->keyboard != NULL) {
wl_keyboard_release(wayl->keyboard);
wayl->keyboard = NULL;
}
if (wayl->pointer.pointer != NULL) {
wl_pointer_release(wayl->pointer.pointer);
wayl->pointer.pointer = NULL;
}
if (caps & WL_SEAT_CAPABILITY_KEYBOARD) {
wayl->keyboard = wl_seat_get_keyboard(wl_seat);
wl_keyboard_add_listener(wayl->keyboard, &keyboard_listener, wayl);
}
if (caps & WL_SEAT_CAPABILITY_POINTER) {
wayl->pointer.pointer = wl_seat_get_pointer(wl_seat);
wl_pointer_add_listener(wayl->pointer.pointer, &pointer_listener, wayl);
}
}
static void
seat_handle_name(void *data, struct wl_seat *wl_seat, const char *name)
{
}
static const struct wl_seat_listener seat_listener = {
.capabilities = seat_handle_capabilities,
.name = seat_handle_name,
};
static void
output_update_ppi(struct monitor *mon)
{
int x_inches = mon->width_mm * 0.03937008;
int y_inches = mon->height_mm * 0.03937008;
mon->x_ppi = mon->width_px / x_inches;
mon->y_ppi = mon->height_px / y_inches;
}
static void
output_geometry(void *data, struct wl_output *wl_output, int32_t x, int32_t y,
int32_t physical_width, int32_t physical_height,
int32_t subpixel, const char *make, const char *model,
int32_t transform)
{
struct monitor *mon = data;
mon->width_mm = physical_width;
mon->height_mm = physical_height;
mon->inch = sqrt(pow(mon->width_mm, 2) + pow(mon->height_mm, 2)) * 0.03937008;
mon->make = make != NULL ? strdup(make) : NULL;
mon->model = model != NULL ? strdup(model) : NULL;
output_update_ppi(mon);
}
static void
output_mode(void *data, struct wl_output *wl_output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh)
{
if ((flags & WL_OUTPUT_MODE_CURRENT) == 0)
return;
struct monitor *mon = data;
mon->refresh = (float)refresh / 1000;
}
static void
output_done(void *data, struct wl_output *wl_output)
{
}
static void
output_scale(void *data, struct wl_output *wl_output, int32_t factor)
{
struct monitor *mon = data;
mon->scale = factor;
tll_foreach(mon->wayl->terms, it) {
struct terminal *term = it->item;
int scale = term->scale;
render_resize(term, term->width / scale, term->height / scale);
wayl_reload_cursor_theme(mon->wayl, term);
}
}
static const struct wl_output_listener output_listener = {
.geometry = &output_geometry,
.mode = &output_mode,
.done = &output_done,
.scale = &output_scale,
};
static void
xdg_output_handle_logical_position(
void *data, struct zxdg_output_v1 *xdg_output, int32_t x, int32_t y)
{
struct monitor *mon = data;
mon->x = x;
mon->y = y;
}
static void
xdg_output_handle_logical_size(void *data, struct zxdg_output_v1 *xdg_output,
int32_t width, int32_t height)
{
struct monitor *mon = data;
mon->width_px = width;
mon->height_px = height;
output_update_ppi(mon);
}
static void
xdg_output_handle_done(void *data, struct zxdg_output_v1 *xdg_output)
{
}
static void
xdg_output_handle_name(void *data, struct zxdg_output_v1 *xdg_output,
const char *name)
{
struct monitor *mon = data;
mon->name = strdup(name);
}
static void
xdg_output_handle_description(void *data, struct zxdg_output_v1 *xdg_output,
const char *description)
{
}
static const struct zxdg_output_v1_listener xdg_output_listener = {
.logical_position = xdg_output_handle_logical_position,
.logical_size = xdg_output_handle_logical_size,
.done = xdg_output_handle_done,
.name = xdg_output_handle_name,
.description = xdg_output_handle_description,
};
static void
clock_id(void *data, struct wp_presentation *wp_presentation, uint32_t clk_id)
{
struct wayland *wayl = data;
wayl->presentation_clock_id = clk_id;
LOG_DBG("presentation clock ID: %u", clk_id);
}
static const struct wp_presentation_listener presentation_listener = {
.clock_id = &clock_id,
};
static bool
verify_iface_version(const char *iface, uint32_t version, uint32_t wanted)
{
if (version >= wanted)
return true;
LOG_ERR("%s: need interface version %u, but compositor only implements %u",
iface, wanted, version);
return false;
}
static void
handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version)
{
LOG_DBG("global: %s, version=%u", interface, version);
struct wayland *wayl = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
const uint32_t required = 4;
if (!verify_iface_version(interface, version, required))
return;
wayl->compositor = wl_registry_bind(
wayl->registry, name, &wl_compositor_interface, required);
}
else if (strcmp(interface, wl_subcompositor_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->sub_compositor = wl_registry_bind(
wayl->registry, name, &wl_subcompositor_interface, required);
}
else if (strcmp(interface, wl_shm_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->shm = wl_registry_bind(
wayl->registry, name, &wl_shm_interface, required);
wl_shm_add_listener(wayl->shm, &shm_listener, wayl);
wl_display_roundtrip(wayl->display);
}
else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->shell = wl_registry_bind(
wayl->registry, name, &xdg_wm_base_interface, required);
xdg_wm_base_add_listener(wayl->shell, &xdg_wm_base_listener, wayl);
}
else if (strcmp(interface, zxdg_decoration_manager_v1_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->xdg_decoration_manager = wl_registry_bind(
wayl->registry, name, &zxdg_decoration_manager_v1_interface, required);
}
else if (strcmp(interface, wl_seat_interface.name) == 0) {
const uint32_t required = 5;
if (!verify_iface_version(interface, version, required))
return;
wayl->seat = wl_registry_bind(
wayl->registry, name, &wl_seat_interface, required);
wl_seat_add_listener(wayl->seat, &seat_listener, wayl);
wl_display_roundtrip(wayl->display);
}
else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->xdg_output_manager = wl_registry_bind(
wayl->registry, name, &zxdg_output_manager_v1_interface,
min(version, 2));
}
else if (strcmp(interface, wl_output_interface.name) == 0) {
const uint32_t required = 3;
if (!verify_iface_version(interface, version, required))
return;
struct wl_output *output = wl_registry_bind(
wayl->registry, name, &wl_output_interface, required);
tll_push_back(
wayl->monitors, ((struct monitor){.wayl = wayl, .output = output}));
struct monitor *mon = &tll_back(wayl->monitors);
wl_output_add_listener(output, &output_listener, mon);
if (wayl->xdg_output_manager != NULL) {
mon->xdg = zxdg_output_manager_v1_get_xdg_output(
wayl->xdg_output_manager, mon->output);
zxdg_output_v1_add_listener(mon->xdg, &xdg_output_listener, mon);
}
wl_display_roundtrip(wayl->display);
}
else if (strcmp(interface, wl_data_device_manager_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->data_device_manager = wl_registry_bind(
wayl->registry, name, &wl_data_device_manager_interface, required);
}
else if (strcmp(interface, zwp_primary_selection_device_manager_v1_interface.name) == 0) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->primary_selection_device_manager = wl_registry_bind(
wayl->registry, name,
&zwp_primary_selection_device_manager_v1_interface, required);
}
else if (strcmp(interface, wp_presentation_interface.name) == 0) {
if (wayl->conf->presentation_timings) {
const uint32_t required = 1;
if (!verify_iface_version(interface, version, required))
return;
wayl->presentation = wl_registry_bind(
wayl->registry, name, &wp_presentation_interface, required);
wp_presentation_add_listener(
wayl->presentation, &presentation_listener, wayl);
}
}
}
static void
surface_enter(void *data, struct wl_surface *wl_surface,
struct wl_output *wl_output)
{
struct wl_window *win = data;
struct terminal *term = win->term;
tll_foreach(term->wl->monitors, it) {
if (it->item.output == wl_output) {
LOG_DBG("mapped on %s", it->item.name);
tll_push_back(term->window->on_outputs, &it->item);
/* Resize, since scale-to-use may have changed */
int scale = term->scale;
render_resize(term, term->width / scale, term->height / scale);
wayl_reload_cursor_theme(term->wl, term);
return;
}
}
LOG_ERR("mapped on unknown output");
}
static void
surface_leave(void *data, struct wl_surface *wl_surface,
struct wl_output *wl_output)
{
struct wl_window *win = data;
struct terminal *term = win->term;
tll_foreach(term->window->on_outputs, it) {
if (it->item->output != wl_output)
continue;
LOG_DBG("unmapped from %s", it->item->name);
tll_remove(term->window->on_outputs, it);
/* Resize, since scale-to-use may have changed */
int scale = term->scale;
render_resize(term, term->width / scale, term->height / scale);
wayl_reload_cursor_theme(term->wl, term);
return;
}
LOG_ERR("unmapped from unknown output");
}
static const struct wl_surface_listener surface_listener = {
.enter = &surface_enter,
.leave = &surface_leave,
};
static void
xdg_toplevel_configure(void *data, struct xdg_toplevel *xdg_toplevel,
int32_t width, int32_t height, struct wl_array *states)
{
bool is_activated = false;
#if defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
char state_str[2048];
int state_chars = 0;
static const char *const strings[] = {
[XDG_TOPLEVEL_STATE_MAXIMIZED] = "maximized",
[XDG_TOPLEVEL_STATE_FULLSCREEN] = "fullscreen",
[XDG_TOPLEVEL_STATE_RESIZING] = "resizing",
[XDG_TOPLEVEL_STATE_ACTIVATED] = "activated",
[XDG_TOPLEVEL_STATE_TILED_LEFT] = "tiled:left",
[XDG_TOPLEVEL_STATE_TILED_RIGHT] = "tiled:right",
[XDG_TOPLEVEL_STATE_TILED_TOP] = "tiled:top",
[XDG_TOPLEVEL_STATE_TILED_BOTTOM] = "tiled:bottom",
};
#endif
enum xdg_toplevel_state *state;
wl_array_for_each(state, states) {
switch (*state) {
case XDG_TOPLEVEL_STATE_ACTIVATED:
is_activated = true;
break;
case XDG_TOPLEVEL_STATE_MAXIMIZED:
case XDG_TOPLEVEL_STATE_FULLSCREEN:
case XDG_TOPLEVEL_STATE_RESIZING:
case XDG_TOPLEVEL_STATE_TILED_LEFT:
case XDG_TOPLEVEL_STATE_TILED_RIGHT:
case XDG_TOPLEVEL_STATE_TILED_TOP:
case XDG_TOPLEVEL_STATE_TILED_BOTTOM:
/* Ignored */
break;
}
#if defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
if (*state >= XDG_TOPLEVEL_STATE_MAXIMIZED &&
*state <= XDG_TOPLEVEL_STATE_TILED_BOTTOM)
{
state_chars += snprintf(
&state_str[state_chars], sizeof(state_str) - state_chars,
"%s, ", strings[*state]);
}
#endif
}
#if defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
if (state_chars > 2)
state_str[state_chars - 2] = '\0';
LOG_DBG("xdg-toplevel: configure: size=%dx%d, states=%s",
width, height, state_str);
#endif
/*
* Changes done here are ignored until the configure event has
* been ack:ed in xdg_surface_configure().
*
* So, just store the config data and apply it later, in
* xdg_surface_configure() after we've ack:ed the event.
*/
struct wl_window *win = data;
win->configure.is_activated = is_activated;
win->configure.width = width;
win->configure.height = height;
}
static void
xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
{
struct wl_window *win = data;
struct terminal *term = win->term;
LOG_DBG("xdg-toplevel: close");
term_shutdown(term);
}
static const struct xdg_toplevel_listener xdg_toplevel_listener = {
.configure = &xdg_toplevel_configure,
.close = &xdg_toplevel_close,
};
static void
xdg_surface_configure(void *data, struct xdg_surface *xdg_surface,
uint32_t serial)
{
LOG_DBG("xdg-surface: configure");
xdg_surface_ack_configure(xdg_surface, serial);
struct wl_window *win = data;
struct terminal *term = win->term;
win->is_configured = true;
render_resize(term, win->configure.width, win->configure.height);
if (win->configure.is_activated)
term_visual_focus_in(term);
else
term_visual_focus_out(term);
}
static const struct xdg_surface_listener xdg_surface_listener = {
.configure = &xdg_surface_configure,
};
static void
xdg_toplevel_decoration_configure(void *data,
struct zxdg_toplevel_decoration_v1 *zxdg_toplevel_decoration_v1,
uint32_t mode)
{
switch (mode) {
case ZXDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE:
LOG_ERR("unimplemented: client-side decorations");
break;
case ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE:
LOG_DBG("using server-side decorations");
break;
default:
LOG_ERR("unimplemented: unknown XDG toplevel decoration mode: %u", mode);
break;
}
}
static const struct zxdg_toplevel_decoration_v1_listener xdg_toplevel_decoration_listener = {
.configure = &xdg_toplevel_decoration_configure,
};
static void
handle_global_remove(void *data, struct wl_registry *registry, uint32_t name)
{
LOG_WARN("global removed: %u", name);
assert(false);
}
static const struct wl_registry_listener registry_listener = {
.global = &handle_global,
.global_remove = &handle_global_remove,
};
static void
fdm_hook(struct fdm *fdm, void *data)
{
struct wayland *wayl = data;
wayl_flush(wayl);
}
static bool
fdm_wayl(struct fdm *fdm, int fd, int events, void *data)
{
struct wayland *wayl = data;
int event_count = 0;
if (events & EPOLLIN) {
if (wl_display_read_events(wayl->display) < 0) {
LOG_ERRNO("failed to read events from the Wayland socket");
return false;
}
while (wl_display_prepare_read(wayl->display) != 0)
wl_display_dispatch_pending(wayl->display);
}
if (events & EPOLLHUP) {
LOG_WARN("disconnected from Wayland");
wl_display_cancel_read(wayl->display);
return false;
}
return event_count != -1;
}
static bool
fdm_repeat(struct fdm *fdm, int fd, int events, void *data)
{
if (events & EPOLLHUP)
return false;
struct wayland *wayl = data;
uint64_t expiration_count;
ssize_t ret = read(
wayl->kbd.repeat.fd, &expiration_count, sizeof(expiration_count));
if (ret < 0) {
if (errno == EAGAIN)
return true;
LOG_ERRNO("failed to read repeat key from repeat timer fd");
return false;
}
wayl->kbd.repeat.dont_re_repeat = true;
for (size_t i = 0; i < expiration_count; i++)
input_repeat(wayl, wayl->kbd.repeat.key);
wayl->kbd.repeat.dont_re_repeat = false;
return true;
}
struct wayland *
wayl_init(const struct config *conf, struct fdm *fdm)
{
struct wayland *wayl = calloc(1, sizeof(*wayl));
wayl->conf = conf;
wayl->fdm = fdm;
wayl->kbd.repeat.fd = -1;
wayl->display = wl_display_connect(NULL);
if (wayl->display == NULL) {
LOG_ERR("failed to connect to wayland; no compositor running?");
goto out;
}
wayl->registry = wl_display_get_registry(wayl->display);
if (wayl->registry == NULL) {
LOG_ERR("failed to get wayland registry");
goto out;
}
wl_registry_add_listener(wayl->registry, &registry_listener, wayl);
wl_display_roundtrip(wayl->display);
if (wayl->compositor == NULL) {
LOG_ERR("no compositor");
goto out;
}
if (wayl->sub_compositor == NULL) {
LOG_ERR("no sub compositor");
goto out;
}
if (wayl->shm == NULL) {
LOG_ERR("no shared memory buffers interface");
goto out;
}
if (wayl->shell == NULL) {
LOG_ERR("no XDG shell interface");
goto out;
}
if (wayl->seat == NULL) {
LOG_ERR("no seat available");
goto out;
}
if (wayl->data_device_manager == NULL) {
LOG_ERR("no clipboard available "
"(wl_data_device_manager not implemented by server)");
goto out;
}
if (!wayl->have_argb8888) {
LOG_ERR("compositor does not support ARGB surfaces");
goto out;
}
if (wayl->primary_selection_device_manager == NULL)
LOG_WARN("no primary selection available");
if (conf->presentation_timings && wayl->presentation == NULL)
LOG_WARN("presentation time interface not implemented by compositor; "
"timings will not be available");
tll_foreach(wayl->monitors, it) {
LOG_INFO(
"%s: %dx%d+%dx%d@%dHz %s (%.2f\", PPI=%dx%d, scale=%d)",
it->item.name, it->item.width_px, it->item.height_px,
it->item.x, it->item.y, (int)round(it->item.refresh), it->item.model, it->item.inch,
it->item.x_ppi, it->item.y_ppi,
it->item.scale);
}
/* Clipboard */
wayl->data_device = wl_data_device_manager_get_data_device(
wayl->data_device_manager, wayl->seat);
wl_data_device_add_listener(wayl->data_device, &data_device_listener, wayl);
/* Primary selection */
if (wayl->primary_selection_device_manager != NULL) {
wayl->primary_selection_device = zwp_primary_selection_device_manager_v1_get_device(
wayl->primary_selection_device_manager, wayl->seat);
zwp_primary_selection_device_v1_add_listener(
wayl->primary_selection_device, &primary_selection_device_listener, wayl);
}
/* Cursor */
unsigned cursor_size = 24;
const char *cursor_theme = getenv("XCURSOR_THEME");
{
const char *env_cursor_size = getenv("XCURSOR_SIZE");
if (env_cursor_size != NULL) {
unsigned size;
if (sscanf(env_cursor_size, "%u", &size) == 1)
cursor_size = size;
}
}
/* Note: theme is (re)loaded on scale and output changes */
LOG_INFO("cursor theme: %s, size: %u", cursor_theme, cursor_size);
wayl->pointer.size = cursor_size;
wayl->pointer.theme_name = cursor_theme != NULL ? strdup(cursor_theme) : NULL;
wayl->pointer.surface = wl_compositor_create_surface(wayl->compositor);
if (wayl->pointer.surface == NULL) {
LOG_ERR("failed to create cursor surface");
goto out;
}
/* All wayland initialization done - make it so */
wl_display_roundtrip(wayl->display);
int wl_fd = wl_display_get_fd(wayl->display);
if (fcntl(wl_fd, F_SETFL, fcntl(wl_fd, F_GETFL) | O_NONBLOCK) < 0) {
LOG_ERRNO("failed to make Wayland socket non-blocking");
goto out;
}
wayl->kbd.repeat.fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK);
if (wayl->kbd.repeat.fd == -1) {
LOG_ERRNO("failed to create keyboard repeat timer FD");
goto out;
}
if (wl_display_prepare_read(wayl->display) != 0) {
LOG_ERRNO("failed to prepare for reading wayland events");
goto out;
}
if (!fdm_add(fdm, wl_display_get_fd(wayl->display), EPOLLIN, &fdm_wayl, wayl) ||
!fdm_add(fdm, wayl->kbd.repeat.fd, EPOLLIN, &fdm_repeat, wayl))
{
goto out;
}
if (!fdm_hook_add(fdm, &fdm_hook, wayl, FDM_HOOK_PRIORITY_LOW)) {
LOG_ERR("failed to add FDM hook");
goto out;
}
return wayl;
out:
if (wayl != NULL)
wayl_destroy(wayl);
return NULL;
}
void
wayl_destroy(struct wayland *wayl)
{
if (wayl == NULL)
return;
tll_foreach(wayl->terms, it) {
static bool have_warned = false;
if (!have_warned) {
have_warned = true;
LOG_WARN("there are terminals still running");
term_destroy(it->item);
}
}
tll_free(wayl->terms);
fdm_hook_del(wayl->fdm, &fdm_hook, FDM_HOOK_PRIORITY_LOW);
if (wayl->kbd.repeat.fd != -1)
fdm_del(wayl->fdm, wayl->kbd.repeat.fd);
tll_foreach(wayl->monitors, it) {
free(it->item.name);
if (it->item.xdg != NULL)
zxdg_output_v1_destroy(it->item.xdg);
if (it->item.output != NULL)
wl_output_destroy(it->item.output);
free(it->item.make);
free(it->item.model);
tll_remove(wayl->monitors, it);
}
if (wayl->pointer.xcursor_callback != NULL)
wl_callback_destroy(wayl->pointer.xcursor_callback);
if (wayl->xdg_output_manager != NULL)
zxdg_output_manager_v1_destroy(wayl->xdg_output_manager);
if (wayl->shell != NULL)
xdg_wm_base_destroy(wayl->shell);
if (wayl->xdg_decoration_manager != NULL)
zxdg_decoration_manager_v1_destroy(wayl->xdg_decoration_manager);
if (wayl->presentation != NULL)
wp_presentation_destroy(wayl->presentation);
if (wayl->kbd.xkb_compose_state != NULL)
xkb_compose_state_unref(wayl->kbd.xkb_compose_state);
if (wayl->kbd.xkb_compose_table != NULL)
xkb_compose_table_unref(wayl->kbd.xkb_compose_table);
if (wayl->kbd.xkb_keymap != NULL)
xkb_keymap_unref(wayl->kbd.xkb_keymap);
if (wayl->kbd.xkb_state != NULL)
xkb_state_unref(wayl->kbd.xkb_state);
if (wayl->kbd.xkb != NULL)
xkb_context_unref(wayl->kbd.xkb);
if (wayl->clipboard.data_source != NULL)
wl_data_source_destroy(wayl->clipboard.data_source);
if (wayl->clipboard.data_offer != NULL)
wl_data_offer_destroy(wayl->clipboard.data_offer);
free(wayl->clipboard.text);
if (wayl->primary.data_source != NULL)
zwp_primary_selection_source_v1_destroy(wayl->primary.data_source);
if (wayl->primary.data_offer != NULL)
zwp_primary_selection_offer_v1_destroy(wayl->primary.data_offer);
free(wayl->primary.text);
free(wayl->pointer.theme_name);
if (wayl->pointer.theme != NULL)
wl_cursor_theme_destroy(wayl->pointer.theme);
if (wayl->pointer.pointer != NULL)
wl_pointer_destroy(wayl->pointer.pointer);
if (wayl->pointer.surface != NULL)
wl_surface_destroy(wayl->pointer.surface);
if (wayl->keyboard != NULL)
wl_keyboard_destroy(wayl->keyboard);
if (wayl->data_device != NULL)
wl_data_device_destroy(wayl->data_device);
if (wayl->data_device_manager != NULL)
wl_data_device_manager_destroy(wayl->data_device_manager);
if (wayl->primary_selection_device != NULL)
zwp_primary_selection_device_v1_destroy(wayl->primary_selection_device);
if (wayl->primary_selection_device_manager != NULL)
zwp_primary_selection_device_manager_v1_destroy(wayl->primary_selection_device_manager);
if (wayl->seat != NULL)
wl_seat_destroy(wayl->seat);
if (wayl->shm != NULL)
wl_shm_destroy(wayl->shm);
if (wayl->sub_compositor != NULL)
wl_subcompositor_destroy(wayl->sub_compositor);
if (wayl->compositor != NULL)
wl_compositor_destroy(wayl->compositor);
if (wayl->registry != NULL)
wl_registry_destroy(wayl->registry);
if (wayl->display != NULL) {
fdm_del_no_close(wayl->fdm, wl_display_get_fd(wayl->display));
wl_display_disconnect(wayl->display);
}
free(wayl);
}
struct wl_window *
wayl_win_init(struct terminal *term)
{
struct wayland *wayl = term->wl;
struct wl_window *win = calloc(1, sizeof(*win));
win->term = term;
win->surface = wl_compositor_create_surface(wayl->compositor);
if (win->surface == NULL) {
LOG_ERR("failed to create wayland surface");
goto out;
}
if (term->colors.alpha == 0xffff) {
struct wl_region *region = wl_compositor_create_region(
term->wl->compositor);
if (region != NULL) {
wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_set_opaque_region(win->surface, region);
wl_region_destroy(region);
}
}
wl_surface_add_listener(win->surface, &surface_listener, win);
win->xdg_surface = xdg_wm_base_get_xdg_surface(wayl->shell, win->surface);
xdg_surface_add_listener(win->xdg_surface, &xdg_surface_listener, win);
win->xdg_toplevel = xdg_surface_get_toplevel(win->xdg_surface);
xdg_toplevel_add_listener(win->xdg_toplevel, &xdg_toplevel_listener, win);
xdg_toplevel_set_app_id(win->xdg_toplevel, "foot");
/* Request server-side decorations */
win->xdg_toplevel_decoration = zxdg_decoration_manager_v1_get_toplevel_decoration(
wayl->xdg_decoration_manager, win->xdg_toplevel);
zxdg_toplevel_decoration_v1_set_mode(
win->xdg_toplevel_decoration, ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
zxdg_toplevel_decoration_v1_add_listener(
win->xdg_toplevel_decoration, &xdg_toplevel_decoration_listener, win);
/* Scrollback search box */
win->search_surface = wl_compositor_create_surface(wayl->compositor);
win->search_sub_surface = wl_subcompositor_get_subsurface(
wayl->sub_compositor, win->search_surface, win->surface);
wl_subsurface_set_desync(win->search_sub_surface);
wl_surface_commit(win->surface);
return win;
out:
if (win != NULL)
wayl_win_destroy(win);
return NULL;
}
void
wayl_win_destroy(struct wl_window *win)
{
if (win == NULL)
return;
/*
* First, unmap all surfaces to trigger things like
* keyboard_leave() and wl_pointer_leave().
*
* This ensures we remove all references to *this* window from the
* global wayland struct (since it no longer has neither keyboard
* nor mouse focus).
*/
/* Scrollback search */
wl_surface_attach(win->search_surface, NULL, 0, 0);
wl_surface_commit(win->search_surface);
wayl_roundtrip(win->term->wl);
/* Main window */
wl_surface_attach(win->surface, NULL, 0, 0);
wl_surface_commit(win->surface);
wayl_roundtrip(win->term->wl);
tll_free(win->on_outputs);
if (win->search_sub_surface != NULL)
wl_subsurface_destroy(win->search_sub_surface);
if (win->search_surface != NULL)
wl_surface_destroy(win->search_surface);
if (win->frame_callback != NULL)
wl_callback_destroy(win->frame_callback);
if (win->xdg_toplevel_decoration != NULL)
zxdg_toplevel_decoration_v1_destroy(win->xdg_toplevel_decoration);
if (win->xdg_toplevel != NULL)
xdg_toplevel_destroy(win->xdg_toplevel);
if (win->xdg_surface != NULL)
xdg_surface_destroy(win->xdg_surface);
if (win->surface != NULL)
wl_surface_destroy(win->surface);
wayl_roundtrip(win->term->wl);
free(win);
}
static bool
wayl_reload_cursor_theme(struct wayland *wayl, struct terminal *term)
{
if (wayl->pointer.size == 0)
return true;
if (wayl->pointer.theme != NULL) {
wl_cursor_theme_destroy(wayl->pointer.theme);
wayl->pointer.theme = NULL;
wayl->pointer.cursor = NULL;
}
LOG_DBG("reloading cursor theme: %s@%d",
wayl->pointer.theme_name, wayl->pointer.size);
wayl->pointer.theme = wl_cursor_theme_load(
wayl->pointer.theme_name, wayl->pointer.size * term->scale, wayl->shm);
if (wayl->pointer.theme == NULL) {
LOG_ERR("failed to load cursor theme");
return false;
}
return render_xcursor_set(term);
}
struct terminal *
wayl_terminal_from_surface(struct wayland *wayl, struct wl_surface *surface)
{
tll_foreach(wayl->terms, it) {
if (it->item->window->surface == surface ||
it->item->window->search_surface == surface)
{
return it->item;
}
}
assert(false);
LOG_WARN("surface %p doesn't map to a terminal", surface);
return NULL;
}
void
wayl_flush(struct wayland *wayl)
{
while (true) {
int r = wl_display_flush(wayl->display);
if (r >= 0) {
/* Most likely code path - the flush succeed */
return;
}
if (errno == EINTR) {
/* Unlikely */
continue;
}
if (errno != EAGAIN) {
LOG_ERRNO("failed to flush wayland socket");
return;
}
/* Socket buffer is full - need to wait for it to become
writeable again */
assert(errno == EAGAIN);
while (true) {
struct pollfd fds[] = {
{.fd = wl_display_get_fd(wayl->display), .events = POLLOUT},
};
r = poll(fds, sizeof(fds) / sizeof(fds[0]), -1);
if (r < 0) {
if (errno == EINTR)
continue;
LOG_ERRNO("failed to poll");
return;
}
if (fds[0].revents & POLLHUP)
return;
assert(fds[0].revents & POLLOUT);
break;
}
}
}
void
wayl_roundtrip(struct wayland *wayl)
{
wl_display_cancel_read(wayl->display);
wl_display_roundtrip(wayl->display);
/* I suspect the roundtrip above clears the pending queue, and
* that prepare_read() will always succeed in the first call. But,
* better safe than sorry... */
while (wl_display_prepare_read(wayl->display) != 0)
wl_display_dispatch_pending(wayl->display);
wayl_flush(wayl);
}