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foot/main.c
Daniel Eklöf 5fefb950b3
fdm: use the FDM's poll loop
2019-10-27 11:46:18 +01:00

1296 lines
41 KiB
C
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdbool.h>
#include <unistd.h>
#include <assert.h>
#include <fcntl.h>
#include <locale.h>
#include <getopt.h>
#include <poll.h>
#include <errno.h>
#include <sys/timerfd.h>
#include <sys/sysinfo.h>
#include <sys/prctl.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/epoll.h>
#include <wayland-client.h>
#include <wayland-cursor.h>
#include <xdg-shell.h>
#include <xkbcommon/xkbcommon-compose.h>
#include <xdg-output-unstable-v1.h>
#include <xdg-decoration-unstable-v1.h>
#define LOG_MODULE "main"
#define LOG_ENABLE_DBG 1
#include "log.h"
#include "config.h"
#include "fdm.h"
#include "font.h"
#include "grid.h"
#include "input.h"
#include "render.h"
#include "selection.h"
#include "shm.h"
#include "slave.h"
#include "terminal.h"
#include "tokenize.h"
#include "version.h"
#include "vt.h"
#define min(x, y) ((x) < (y) ? (x) : (y))
#define max(x, y) ((x) > (y) ? (x) : (y))
static void
shm_format(void *data, struct wl_shm *wl_shm, uint32_t format)
{
struct terminal *term = data;
if (format == WL_SHM_FORMAT_ARGB8888)
term->wl.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 terminal *term = data;
if (term->wl.keyboard != NULL) {
wl_keyboard_release(term->wl.keyboard);
term->wl.keyboard = NULL;
}
if (term->wl.pointer.pointer != NULL) {
wl_pointer_release(term->wl.pointer.pointer);
term->wl.pointer.pointer = NULL;
}
if (caps & WL_SEAT_CAPABILITY_KEYBOARD) {
term->wl.keyboard = wl_seat_get_keyboard(wl_seat);
wl_keyboard_add_listener(term->wl.keyboard, &keyboard_listener, term);
}
if (caps & WL_SEAT_CAPABILITY_POINTER) {
term->wl.pointer.pointer = wl_seat_get_pointer(wl_seat);
wl_pointer_add_listener(term->wl.pointer.pointer, &pointer_listener, term);
}
}
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_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;
}
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;
render_resize(mon->term, mon->term->width / mon->term->scale, mon->term->height / mon->term->scale);
render_reload_cursor_theme(mon->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;
}
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 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
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 terminal *term = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
term->wl.compositor = wl_registry_bind(
term->wl.registry, name, &wl_compositor_interface, 4);
}
else if (strcmp(interface, wl_subcompositor_interface.name) == 0) {
term->wl.sub_compositor = wl_registry_bind(
term->wl.registry, name, &wl_subcompositor_interface, 1);
}
else if (strcmp(interface, wl_shm_interface.name) == 0) {
term->wl.shm = wl_registry_bind(
term->wl.registry, name, &wl_shm_interface, 1);
wl_shm_add_listener(term->wl.shm, &shm_listener, term);
wl_display_roundtrip(term->wl.display);
}
else if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
term->wl.shell = wl_registry_bind(
term->wl.registry, name, &xdg_wm_base_interface, 1);
xdg_wm_base_add_listener(term->wl.shell, &xdg_wm_base_listener, term);
}
else if (strcmp(interface, zxdg_decoration_manager_v1_interface.name) == 0)
term->wl.xdg_decoration_manager = wl_registry_bind(
term->wl.registry, name, &zxdg_decoration_manager_v1_interface, 1);
else if (strcmp(interface, wl_seat_interface.name) == 0) {
term->wl.seat = wl_registry_bind(
term->wl.registry, name, &wl_seat_interface, 5);
wl_seat_add_listener(term->wl.seat, &seat_listener, term);
wl_display_roundtrip(term->wl.display);
}
else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
term->wl.xdg_output_manager = wl_registry_bind(
term->wl.registry, name, &zxdg_output_manager_v1_interface, min(version, 2));
}
else if (strcmp(interface, wl_output_interface.name) == 0) {
struct wl_output *output = wl_registry_bind(
term->wl.registry, name, &wl_output_interface, 3);
tll_push_back(
term->wl.monitors, ((struct monitor){
.term = term, .output = output}));
struct monitor *mon = &tll_back(term->wl.monitors);
wl_output_add_listener(output, &output_listener, mon);
mon->xdg = zxdg_output_manager_v1_get_xdg_output(
term->wl.xdg_output_manager, mon->output);
zxdg_output_v1_add_listener(mon->xdg, &xdg_output_listener, mon);
wl_display_roundtrip(term->wl.display);
}
else if (strcmp(interface, wl_data_device_manager_interface.name) == 0) {
term->wl.data_device_manager = wl_registry_bind(
term->wl.registry, name, &wl_data_device_manager_interface, 1);
}
else if (strcmp(interface, zwp_primary_selection_device_manager_v1_interface.name) == 0) {
term->wl.primary_selection_device_manager = wl_registry_bind(
term->wl.registry, name, &zwp_primary_selection_device_manager_v1_interface, 1);
}
}
static void
surface_enter(void *data, struct wl_surface *wl_surface,
struct wl_output *wl_output)
{
struct terminal *term = data;
tll_foreach(term->wl.monitors, it) {
if (it->item.output == wl_output) {
LOG_DBG("mapped on %s", it->item.name);
tll_push_back(term->wl.on_outputs, &it->item);
/* Resize, since scale-to-use may have changed */
render_resize(term, term->width / term->scale, term->height / term->scale);
render_reload_cursor_theme(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 terminal *term = data;
tll_foreach(term->wl.on_outputs, it) {
if (it->item->output != wl_output)
continue;
LOG_DBG("unmapped from %s", it->item->name);
tll_remove(term->wl.on_outputs, it);
/* Resize, since scale-to-use may have changed */
render_resize(term, term->width / term->scale, term->height / term->scale);
render_reload_cursor_theme(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)
{
LOG_DBG("xdg-toplevel: configure: %dx%d", width, height);
if (width <= 0 || height <= 0)
return;
struct terminal *term = data;
render_resize(term, width, height);
}
static void
xdg_toplevel_close(void *data, struct xdg_toplevel *xdg_toplevel)
{
struct terminal *term = data;
LOG_DBG("xdg-toplevel: close");
term->quit = true;
wl_display_roundtrip(term->wl.display);
}
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);
}
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 bool
fdm_wayl(struct fdm *fdm, int fd, int events, void *data)
{
struct terminal *term = data;
int event_count = wl_display_dispatch(term->wl.display);
if (events & EPOLLHUP) {
LOG_ERR("disconnected from Wayland");
return false;
}
return event_count != -1 && !term->quit;
}
static bool
fdm_ptmx(struct fdm *fdm, int fd, int events, void *data)
{
struct terminal *term = data;
if (events & EPOLLHUP) {
term->quit = true;
if (!(events & EPOLLIN))
return false;
}
assert(events & EPOLLIN);
uint8_t buf[24 * 1024];
ssize_t count = read(term->ptmx, buf, sizeof(buf));
if (count < 0) {
if (errno == EAGAIN)
return true;
LOG_ERRNO("failed to read from pseudo terminal");
return false;
}
vt_from_slave(term, buf, count);
/*
* We likely need to re-render. But, we don't want to
* do it immediately. Often, a single client operation
* is done through multiple writes. Many times, we're
* so fast that we render mid-operation frames.
*
* For example, we might end up rendering a frame
* where the client just erased a line, while in the
* next frame, the client wrote to the same line. This
* causes screen "flashes".
*
* Mitigate by always incuring a small delay before
* rendering the next frame. This gives the client
* some time to finish the operation (and thus gives
* us time to receive the last writes before doing any
* actual rendering).
*
* We incur this delay *every* time we receive
* input. To ensure we don't delay rendering
* indefinitely, we start a second timer that is only
* reset when we render.
*
* Note that when the client is producing data at a
* very high pace, we're rate limited by the wayland
* compositor anyway. The delay we introduce here only
* has any effect when the renderer is idle.
*
* TODO: this adds input latency. Can we somehow hint
* ourselves we just received keyboard input, and in
* this case *not* delay rendering?
*/
if (term->render.frame_callback == NULL) {
/* First timeout - reset each time we receive input. */
timerfd_settime(
term->delayed_render_timer.lower_fd, 0,
&(struct itimerspec){.it_value = {.tv_nsec = 1000000}},
NULL);
/* Second timeout - only reset when we render. Set to one
* frame (assuming 60Hz) */
if (!term->delayed_render_timer.is_armed) {
timerfd_settime(
term->delayed_render_timer.upper_fd, 0,
&(struct itimerspec){.it_value = {.tv_nsec = 16666666}},
NULL);
term->delayed_render_timer.is_armed = true;
}
}
return !(events & EPOLLHUP);
}
static bool
fdm_repeat(struct fdm *fdm, int fd, int events, void *data)
{
if (events & EPOLLHUP)
return false;
struct terminal *term = data;
uint64_t expiration_count;
ssize_t ret = read(
term->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;
}
term->kbd.repeat.dont_re_repeat = true;
for (size_t i = 0; i < expiration_count; i++)
input_repeat(term, term->kbd.repeat.key);
term->kbd.repeat.dont_re_repeat = false;
return true;
}
static bool
fdm_flash(struct fdm *fdm, int fd, int events, void *data)
{
if (events & EPOLLHUP)
return false;
struct terminal *term = data;
uint64_t expiration_count;
ssize_t ret = read(
term->flash.fd, &expiration_count, sizeof(expiration_count));
if (ret < 0) {
if (errno == EAGAIN)
return true;
LOG_ERRNO("failed to read flash timer");
return false;
}
LOG_DBG("flash timer expired %llu times",
(unsigned long long)expiration_count);
term->flash.active = false;
term_damage_view(term);
render_refresh(term);
return true;
}
static bool
fdm_blink(struct fdm *fdm, int fd, int events, void *data)
{
if (events & EPOLLHUP)
return false;
struct terminal *term = data;
uint64_t expiration_count;
ssize_t ret = read(
term->blink.fd, &expiration_count, sizeof(expiration_count));
if (ret < 0) {
if (errno == EAGAIN)
return true;
LOG_ERRNO("failed to read blink timer");
return false;
}
LOG_DBG("blink timer expired %llu times",
(unsigned long long)expiration_count);
term->blink.state = term->blink.state == BLINK_ON
? BLINK_OFF : BLINK_ON;
/* Scan all visible cells and mark rows with blinking cells dirty */
for (int r = 0; r < term->rows; r++) {
struct row *row = grid_row_in_view(term->grid, r);
for (int col = 0; col < term->cols; col++) {
struct cell *cell = &row->cells[col];
if (cell->attrs.blink) {
cell->attrs.clean = 0;
row->dirty = true;
}
}
}
render_refresh(term);
return true;
}
static bool
fdm_delayed_render(struct fdm *fdm, int fd, int events, void *data)
{
if (events & EPOLLHUP)
return false;
struct terminal *term = data;
assert(term->delayed_render_timer.is_armed);
uint64_t unused;
ssize_t ret1 = 0;
ssize_t ret2 = 0;
if (fd == term->delayed_render_timer.lower_fd)
ret1 = read(term->delayed_render_timer.lower_fd, &unused, sizeof(unused));
if (fd == term->delayed_render_timer.upper_fd)
ret2 = read(term->delayed_render_timer.upper_fd, &unused, sizeof(unused));
if ((ret1 < 0 || ret2 < 0) && errno != EAGAIN)
LOG_ERRNO("failed to read timeout timer");
else if (ret1 > 0 || ret2 > 0) {
render_refresh(term);
/* Reset timers */
term->delayed_render_timer.is_armed = false;
timerfd_settime(term->delayed_render_timer.lower_fd, 0, &(struct itimerspec){.it_value = {0}}, NULL);
timerfd_settime(term->delayed_render_timer.upper_fd, 0, &(struct itimerspec){.it_value = {0}}, NULL);
} else
assert(false);
return true;
}
static void
print_usage(const char *prog_name)
{
printf("Usage: %s [OPTION]...\n", prog_name);
printf("\n");
printf("Options:\n");
printf(" -f,--font=FONT comma separated list of fonts in fontconfig format (monospace)\n"
" -t,--term=TERM value to set the environment variable TERM to (foot)\n"
" -g,--geometry=WIDTHxHEIGHT set initial width and height\n"
" -v,--version show the version number and quit\n");
printf("\n");
}
int
main(int argc, char *const *argv)
{
int ret = EXIT_FAILURE;
/* Startup notifications; we don't support it, but must ensure we
* don't pass this on to programs launched by us */
unsetenv("DESKTOP_STARTUP_ID");
struct config conf = {NULL};
if (!config_load(&conf))
return ret;
const char *const prog_name = argv[0];
static const struct option longopts[] = {
{"term", required_argument, 0, 't'},
{"font", required_argument, 0, 'f'},
{"geometry", required_argument, 0, 'g'},
{"version", no_argument, 0, 'v'},
{"help", no_argument, 0, 'h'},
{NULL, no_argument, 0, 0},
};
while (true) {
int c = getopt_long(argc, argv, ":t:f:g:vh", longopts, NULL);
if (c == -1)
break;
switch (c) {
case 't':
free(conf.term);
conf.term = strdup(optarg);
break;
case 'f':
tll_free_and_free(conf.fonts, free);
//tll_push_back(conf.fonts, strdup(optarg));
for (char *font = strtok(optarg, ","); font != NULL; font = strtok(NULL, ",")) {
/* Strip leading spaces */
while (*font != '\0' && isspace(*font))
font++;
/* Strip trailing spaces */
char *end = font + strlen(font);
assert(*end == '\0');
end--;
while (end > font && isspace(*end))
*(end--) = '\0';
if (strlen(font) == 0)
continue;
tll_push_back(conf.fonts, strdup(font));
}
break;
case 'g': {
unsigned width, height;
if (sscanf(optarg, "%ux%u", &width, &height) != 2 || width == 0 || height == 0) {
fprintf(stderr, "error: invalid geometry: %s\n", optarg);
return EXIT_FAILURE;
}
conf.width = width;
conf.height = height;
break;
}
case 'v':
printf("foot version %s\n", FOOT_VERSION);
return EXIT_SUCCESS;
case 'h':
print_usage(prog_name);
return EXIT_SUCCESS;
case ':':
fprintf(stderr, "error: -%c: missing required argument\n", optopt);
return EXIT_FAILURE;
case '?':
fprintf(stderr, "error: -%c: invalid option\n", optopt);
return EXIT_FAILURE;
}
}
argc -= optind;
argv += optind;
setlocale(LC_ALL, "");
setenv("TERM", conf.term, 1);
struct fdm *fdm = NULL;
struct terminal term = {
.quit = false,
.ptmx = posix_openpt(O_RDWR | O_NOCTTY),
.cursor_keys_mode = CURSOR_KEYS_NORMAL,
.keypad_keys_mode = KEYPAD_NUMERICAL,
.auto_margin = true,
.window_title_stack = tll_init(),
.scale = 1,
.flash = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.blink = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.vt = {
.state = 1, /* STATE_GROUND */
.attrs = {
//.foreground = conf.colors.fg,
//.background = conf.colors.bg
},
},
.kbd = {
.repeat = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
},
.colors = {
.default_fg = conf.colors.fg,
.default_bg = conf.colors.bg,
.default_table = {
conf.colors.regular[0],
conf.colors.regular[1],
conf.colors.regular[2],
conf.colors.regular[3],
conf.colors.regular[4],
conf.colors.regular[5],
conf.colors.regular[6],
conf.colors.regular[7],
conf.colors.bright[0],
conf.colors.bright[1],
conf.colors.bright[2],
conf.colors.bright[3],
conf.colors.bright[4],
conf.colors.bright[5],
conf.colors.bright[6],
conf.colors.bright[7],
},
.alpha = conf.colors.alpha,
},
.default_cursor_style = conf.cursor.style,
.cursor_style = conf.cursor.style,
.default_cursor_color = {
.text = conf.cursor.color.text,
.cursor = conf.cursor.color.cursor,
},
.cursor_color = {
.text = conf.cursor.color.text,
.cursor = conf.cursor.color.cursor,
},
.selection = {
.start = {-1, -1},
.end = {-1, -1},
},
.normal = {.damage = tll_init(), .scroll_damage = tll_init()},
.alt = {.damage = tll_init(), .scroll_damage = tll_init()},
.grid = &term.normal,
.render = {
.scrollback_lines = conf.scrollback_lines,
.workers = {
.count = conf.render_worker_count,
.queue = tll_init(),
},
},
.delayed_render_timer = {
.is_armed = false,
.lower_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
.upper_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
},
};
LOG_INFO("using %zu rendering threads", term.render.workers.count);
struct render_worker_context worker_context[term.render.workers.count];
/* Initialize 'current' colors from the default colors */
term.colors.fg = term.colors.default_fg;
term.colors.bg = term.colors.default_bg;
/* Initialize the 256 gray-scale color cube */
{
/* First 16 entries have already been initialized from conf */
for (size_t r = 0; r < 6; r++) {
for (size_t g = 0; g < 6; g++) {
for (size_t b = 0; b < 6; b++) {
term.colors.default_table[16 + r * 6 * 6 + g * 6 + b]
= r * 51 << 16 | g * 51 << 8 | b * 51;
}
}
}
for (size_t i = 0; i < 24; i++)
term.colors.default_table[232 + i] = i * 11 << 16 | i * 11 << 8 | i * 11;
memcpy(term.colors.table, term.colors.default_table, sizeof(term.colors.table));
}
if (term.ptmx == -1) {
LOG_ERR("failed to open pseudo terminal");
goto out;
}
if (term.flash.fd == -1 || term.blink.fd == -1 || term.kbd.repeat.fd == -1) {
LOG_ERR("failed to create timers");
goto out;
}
sem_init(&term.render.workers.start, 0, 0);
sem_init(&term.render.workers.done, 0, 0);
mtx_init(&term.render.workers.lock, mtx_plain);
cnd_init(&term.render.workers.cond);
term.render.workers.threads = calloc(term.render.workers.count, sizeof(term.render.workers.threads[0]));
for (size_t i = 0; i < term.render.workers.count; i++) {
worker_context[i].term = &term;
worker_context[i].my_id = 1 + i;
thrd_create(&term.render.workers.threads[i], &render_worker_thread, &worker_context[i]);
}
font_list_t font_names = tll_init();
tll_foreach(conf.fonts, it)
tll_push_back(font_names, it->item);
if ((term.fonts[0] = font_from_name(font_names, "")) == NULL) {
tll_free(font_names);
goto out;
}
term.fonts[1] = font_from_name(font_names, "style=bold");
term.fonts[2] = font_from_name(font_names, "style=italic");
term.fonts[3] = font_from_name(font_names, "style=bold italic");
tll_free(font_names);
{
FT_Face ft_face = term.fonts[0]->face;
int max_x_advance = ft_face->size->metrics.max_advance / 64;
int height = ft_face->size->metrics.height / 64;
int descent = ft_face->size->metrics.descender / 64;
int ascent = ft_face->size->metrics.ascender / 64;
term.fextents.height = height * term.fonts[0]->pixel_size_fixup;
term.fextents.descent = -descent * term.fonts[0]->pixel_size_fixup;
term.fextents.ascent = ascent * term.fonts[0]->pixel_size_fixup;
term.fextents.max_x_advance = max_x_advance * term.fonts[0]->pixel_size_fixup;
LOG_DBG("metrics: height: %d, descent: %d, ascent: %d, x-advance: %d",
height, descent, ascent, max_x_advance);
}
term.cell_width = (int)ceil(term.fextents.max_x_advance);
term.cell_height = (int)ceil(term.fextents.height);
LOG_INFO("cell width=%d, height=%d", term.cell_width, term.cell_height);
term.wl.display = wl_display_connect(NULL);
if (term.wl.display == NULL) {
LOG_ERR("failed to connect to wayland; no compositor running?");
goto out;
}
term.wl.registry = wl_display_get_registry(term.wl.display);
if (term.wl.registry == NULL) {
LOG_ERR("failed to get wayland registry");
goto out;
}
wl_registry_add_listener(term.wl.registry, &registry_listener, &term);
wl_display_roundtrip(term.wl.display);
if (term.wl.compositor == NULL) {
LOG_ERR("no compositor");
goto out;
}
if (term.wl.shm == NULL) {
LOG_ERR("no shared memory buffers interface");
goto out;
}
if (term.wl.shell == NULL) {
LOG_ERR("no XDG shell interface");
goto out;
}
if (!term.wl.have_argb8888) {
LOG_ERR("compositor does not support ARGB surfaces");
goto out;
}
if (term.wl.seat == NULL) {
LOG_ERR("no seat available");
goto out;
}
if (term.wl.data_device_manager == NULL) {
LOG_ERR("no clipboard available "
"(wl_data_device_manager not implemented by server)");
goto out;
}
if (term.wl.primary_selection_device_manager == NULL)
LOG_WARN("no primary selection available");
tll_foreach(term.wl.monitors, it) {
LOG_INFO("%s: %dx%d+%dx%d (scale=%d, refresh=%.2fHz)",
it->item.name, it->item.width_px, it->item.height_px,
it->item.x, it->item.y, it->item.scale, it->item.refresh);
}
/* Clipboard */
term.wl.data_device = wl_data_device_manager_get_data_device(
term.wl.data_device_manager, term.wl.seat);
wl_data_device_add_listener(term.wl.data_device, &data_device_listener, &term);
/* Primary selection */
if (term.wl.primary_selection_device_manager != NULL) {
term.wl.primary_selection_device = zwp_primary_selection_device_manager_v1_get_device(
term.wl.primary_selection_device_manager, term.wl.seat);
zwp_primary_selection_device_v1_add_listener(
term.wl.primary_selection_device, &primary_selection_device_listener, &term);
}
/* 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);
term.wl.pointer.size = cursor_size;
term.wl.pointer.theme_name = cursor_theme != NULL ? strdup(cursor_theme) : NULL;
term.wl.pointer.surface = wl_compositor_create_surface(term.wl.compositor);
if (term.wl.pointer.surface == NULL) {
LOG_ERR("failed to create cursor surface");
goto out;
}
/* Main window */
term.wl.surface = wl_compositor_create_surface(term.wl.compositor);
if (term.wl.surface == NULL) {
LOG_ERR("failed to create wayland surface");
goto out;
}
wl_surface_add_listener(term.wl.surface, &surface_listener, &term);
term.wl.xdg_surface = xdg_wm_base_get_xdg_surface(term.wl.shell, term.wl.surface);
xdg_surface_add_listener(term.wl.xdg_surface, &xdg_surface_listener, &term);
term.wl.xdg_toplevel = xdg_surface_get_toplevel(term.wl.xdg_surface);
xdg_toplevel_add_listener(term.wl.xdg_toplevel, &xdg_toplevel_listener, &term);
xdg_toplevel_set_app_id(term.wl.xdg_toplevel, "foot");
term_set_window_title(&term, "foot");
/* Request server-side decorations */
term.wl.xdg_toplevel_decoration = zxdg_decoration_manager_v1_get_toplevel_decoration(
term.wl.xdg_decoration_manager, term.wl.xdg_toplevel);
zxdg_toplevel_decoration_v1_set_mode(
term.wl.xdg_toplevel_decoration, ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
zxdg_toplevel_decoration_v1_add_listener(
term.wl.xdg_toplevel_decoration, &xdg_toplevel_decoration_listener, &term);
/* Scrollback search box */
term.wl.search_surface = wl_compositor_create_surface(term.wl.compositor);
term.wl.search_sub_surface = wl_subcompositor_get_subsurface(
term.wl.sub_compositor, term.wl.search_surface, term.wl.surface);
wl_subsurface_set_desync(term.wl.search_sub_surface);
wl_surface_commit(term.wl.surface);
wl_display_roundtrip(term.wl.display);
if (conf.width == -1) {
assert(conf.height == -1);
conf.width = 80 * term.cell_width;
conf.height = 24 * term.cell_height;
}
conf.width = max(conf.width, term.cell_width);
conf.height = max(conf.height, term.cell_height);
render_resize(&term, conf.width, conf.height);
wl_display_dispatch_pending(term.wl.display);
{
int fork_pipe[2];
if (pipe2(fork_pipe, O_CLOEXEC) < 0) {
LOG_ERRNO("failed to create pipe");
goto out;
}
term.slave = fork();
switch (term.slave) {
case -1:
LOG_ERRNO("failed to fork");
close(fork_pipe[0]);
close(fork_pipe[1]);
goto out;
case 0:
/* Child */
close(fork_pipe[0]); /* Close read end */
char **_shell_argv = NULL;
char *const *shell_argv = argv;
if (argc == 0) {
if (!tokenize_cmdline(conf.shell, &_shell_argv)) {
(void)!write(fork_pipe[1], &errno, sizeof(errno));
_exit(0);
}
shell_argv = _shell_argv;
}
slave_spawn(term.ptmx, shell_argv, fork_pipe[1]);
assert(false);
break;
default: {
close(fork_pipe[1]); /* Close write end */
LOG_DBG("slave has PID %d", term.slave);
int _errno;
static_assert(sizeof(errno) == sizeof(_errno), "errno size mismatch");
ssize_t ret = read(fork_pipe[0], &_errno, sizeof(_errno));
close(fork_pipe[0]);
if (ret < 0) {
LOG_ERRNO("failed to read from pipe");
goto out;
} else if (ret == sizeof(_errno)) {
LOG_ERRNO(
"%s: failed to execute", argc == 0 ? conf.shell : argv[0]);
goto out;
} else
LOG_DBG("%s: successfully started", conf.shell);
break;
}
}
}
/* Read logic requires non-blocking mode */
{
int fd_flags = fcntl(term.ptmx, F_GETFL);
if (fd_flags == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
if (fcntl(term.ptmx, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
}
{
int fd = wl_display_get_fd(term.wl.display);
int fd_flags = fcntl(fd, F_GETFL);
if (fd_flags == -1) {
LOG_ERRNO("failed to set non blocking mode on Wayland display connection");
goto out;
}
if (fcntl(fd, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
LOG_ERRNO("failed to set non blocking mode on Wayland display connection");
goto out;
}
}
if ((fdm = fdm_init()) == NULL)
goto out;
fdm_add(fdm, wl_display_get_fd(term.wl.display), EPOLLIN, &fdm_wayl, &term);
fdm_add(fdm, term.ptmx, EPOLLIN, &fdm_ptmx, &term);
fdm_add(fdm, term.kbd.repeat.fd, EPOLLIN, &fdm_repeat, &term);
fdm_add(fdm, term.flash.fd, EPOLLIN, &fdm_flash, &term);
fdm_add(fdm, term.blink.fd, EPOLLIN, &fdm_blink, &term);
fdm_add(fdm, term.delayed_render_timer.lower_fd, EPOLLIN, &fdm_delayed_render, &term);
fdm_add(fdm, term.delayed_render_timer.upper_fd, EPOLLIN, &fdm_delayed_render, &term);
while (true) {
wl_display_flush(term.wl.display);
if (!fdm_poll(fdm))
break;
}
if (term.quit)
ret = EXIT_SUCCESS;
out:
if (fdm != NULL) {
fdm_del(fdm, wl_display_get_fd(term.wl.display));
fdm_del(fdm, term.ptmx);
fdm_del(fdm, term.kbd.repeat.fd);
fdm_del(fdm, term.flash.fd);
fdm_del(fdm, term.blink.fd);
fdm_del(fdm, term.delayed_render_timer.lower_fd);
fdm_del(fdm, term.delayed_render_timer.upper_fd);
}
if (term.delayed_render_timer.lower_fd != -1)
close(term.delayed_render_timer.lower_fd);
if (term.delayed_render_timer.upper_fd != -1)
close(term.delayed_render_timer.upper_fd);
mtx_lock(&term.render.workers.lock);
assert(tll_length(term.render.workers.queue) == 0);
for (size_t i = 0; i < term.render.workers.count; i++) {
sem_post(&term.render.workers.start);
tll_push_back(term.render.workers.queue, -2);
}
cnd_broadcast(&term.render.workers.cond);
mtx_unlock(&term.render.workers.lock);
shm_fini();
tll_free(term.wl.on_outputs);
tll_foreach(term.wl.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);
tll_remove(term.wl.monitors, it);
}
if (term.wl.xdg_output_manager != NULL)
zxdg_output_manager_v1_destroy(term.wl.xdg_output_manager);
free(term.wl.pointer.theme_name);
if (term.wl.pointer.theme != NULL)
wl_cursor_theme_destroy(term.wl.pointer.theme);
if (term.wl.pointer.pointer != NULL)
wl_pointer_destroy(term.wl.pointer.pointer);
if (term.wl.pointer.surface != NULL)
wl_surface_destroy(term.wl.pointer.surface);
if (term.wl.keyboard != NULL)
wl_keyboard_destroy(term.wl.keyboard);
if (term.selection.clipboard.data_source != NULL)
wl_data_source_destroy(term.selection.clipboard.data_source);
if (term.selection.clipboard.data_offer != NULL)
wl_data_offer_destroy(term.selection.clipboard.data_offer);
free(term.selection.clipboard.text);
if (term.wl.data_device != NULL)
wl_data_device_destroy(term.wl.data_device);
if (term.wl.data_device_manager != NULL)
wl_data_device_manager_destroy(term.wl.data_device_manager);
if (term.selection.primary.data_source != NULL)
zwp_primary_selection_source_v1_destroy(term.selection.primary.data_source);
if (term.selection.primary.data_offer != NULL)
zwp_primary_selection_offer_v1_destroy(term.selection.primary.data_offer);
free(term.selection.primary.text);
if (term.wl.primary_selection_device != NULL)
zwp_primary_selection_device_v1_destroy(term.wl.primary_selection_device);
if (term.wl.primary_selection_device_manager != NULL)
zwp_primary_selection_device_manager_v1_destroy(term.wl.primary_selection_device_manager);
if (term.wl.seat != NULL)
wl_seat_destroy(term.wl.seat);
if (term.wl.search_sub_surface != NULL)
wl_subsurface_destroy(term.wl.search_sub_surface);
if (term.wl.search_surface != NULL)
wl_surface_destroy(term.wl.search_surface);
if (term.render.frame_callback != NULL)
wl_callback_destroy(term.render.frame_callback);
if (term.wl.xdg_toplevel_decoration != NULL)
zxdg_toplevel_decoration_v1_destroy(term.wl.xdg_toplevel_decoration);
if (term.wl.xdg_decoration_manager != NULL)
zxdg_decoration_manager_v1_destroy(term.wl.xdg_decoration_manager);
if (term.wl.xdg_toplevel != NULL)
xdg_toplevel_destroy(term.wl.xdg_toplevel);
if (term.wl.xdg_surface != NULL)
xdg_surface_destroy(term.wl.xdg_surface);
if (term.wl.shell != NULL)
xdg_wm_base_destroy(term.wl.shell);
if (term.wl.surface != NULL)
wl_surface_destroy(term.wl.surface);
if (term.wl.shm != NULL)
wl_shm_destroy(term.wl.shm);
if (term.wl.sub_compositor != NULL)
wl_subcompositor_destroy(term.wl.sub_compositor);
if (term.wl.compositor != NULL)
wl_compositor_destroy(term.wl.compositor);
if (term.wl.registry != NULL)
wl_registry_destroy(term.wl.registry);
if (term.wl.display != NULL)
wl_display_disconnect(term.wl.display);
if (term.kbd.xkb_compose_state != NULL)
xkb_compose_state_unref(term.kbd.xkb_compose_state);
if (term.kbd.xkb_compose_table != NULL)
xkb_compose_table_unref(term.kbd.xkb_compose_table);
if (term.kbd.xkb_keymap != NULL)
xkb_keymap_unref(term.kbd.xkb_keymap);
if (term.kbd.xkb_state != NULL)
xkb_state_unref(term.kbd.xkb_state);
if (term.kbd.xkb != NULL)
xkb_context_unref(term.kbd.xkb);
free(term.vt.osc.data);
for (int row = 0; row < term.normal.num_rows; row++)
grid_row_free(term.normal.rows[row]);
free(term.normal.rows);
for (int row = 0; row < term.alt.num_rows; row++)
grid_row_free(term.alt.rows[row]);
free(term.alt.rows);
free(term.window_title);
tll_free_and_free(term.window_title_stack, free);
for (size_t i = 0; i < sizeof(term.fonts) / sizeof(term.fonts[0]); i++)
font_destroy(term.fonts[i]);
free(term.search.buf);
if (term.flash.fd != -1)
close(term.flash.fd);
if (term.blink.fd != -1)
close(term.blink.fd);
if (term.kbd.repeat.fd != -1)
close(term.kbd.repeat.fd);
if (term.ptmx != -1)
close(term.ptmx);
for (size_t i = 0; i < term.render.workers.count; i++)
thrd_join(term.render.workers.threads[i], NULL);
free(term.render.workers.threads);
cnd_destroy(&term.render.workers.cond);
mtx_destroy(&term.render.workers.lock);
sem_destroy(&term.render.workers.start);
sem_destroy(&term.render.workers.done);
assert(tll_length(term.render.workers.queue) == 0);
tll_free(term.render.workers.queue);
if (term.slave > 0) {
/* Note: we've closed ptmx, so the slave *should* exit... */
int status;
waitpid(term.slave, &status, 0);
int child_ret = EXIT_FAILURE;
if (WIFEXITED(status)) {
child_ret = WEXITSTATUS(status);
LOG_DBG("slave exited with code %d", child_ret);
} else if (WIFSIGNALED(status)) {
child_ret = WTERMSIG(status);
LOG_WARN("slave exited with signal %d", child_ret);
} else {
LOG_WARN("slave exited for unknown reason (status = 0x%08x)", status);
}
if (ret == EXIT_SUCCESS)
ret = child_ret;
}
fdm_destroy(fdm);
config_free(conf);
return ret;
}
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