sway/swaybar/bar.c
Ryan Dwyer 4056c09e13 Move swaybar's event loop to common directory and refactor
* The loop functions are now prefixed with `loop_`.
* It is now easy to add timers to the loop.
* Timers are implemented using pollfd and timerfd, rather than manually
checking them when any other event happens to arrive.
2018-10-15 00:26:27 +10:00

690 lines
19 KiB
C

#define _XOPEN_SOURCE 500
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <wayland-client.h>
#include <wayland-cursor.h>
#include <wlr/util/log.h>
#ifdef __FreeBSD__
#include <dev/evdev/input-event-codes.h>
#else
#include <linux/input-event-codes.h>
#endif
#include "swaybar/bar.h"
#include "swaybar/config.h"
#include "swaybar/i3bar.h"
#include "swaybar/ipc.h"
#include "swaybar/status_line.h"
#include "swaybar/render.h"
#include "ipc-client.h"
#include "list.h"
#include "log.h"
#include "loop.h"
#include "pool-buffer.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
#include "xdg-output-unstable-v1-client-protocol.h"
static void bar_init(struct swaybar *bar) {
bar->config = init_config();
bar->visible = true;
wl_list_init(&bar->outputs);
}
void free_hotspots(struct wl_list *list) {
struct swaybar_hotspot *hotspot, *tmp;
wl_list_for_each_safe(hotspot, tmp, list, link) {
wl_list_remove(&hotspot->link);
if (hotspot->destroy) {
hotspot->destroy(hotspot->data);
}
free(hotspot);
}
}
void free_workspaces(struct wl_list *list) {
struct swaybar_workspace *ws, *tmp;
wl_list_for_each_safe(ws, tmp, list, link) {
wl_list_remove(&ws->link);
free(ws->name);
free(ws);
}
}
static void swaybar_output_free(struct swaybar_output *output) {
if (!output) {
return;
}
wlr_log(WLR_DEBUG, "Removing output %s", output->name);
if (output->layer_surface != NULL) {
zwlr_layer_surface_v1_destroy(output->layer_surface);
}
if (output->surface != NULL) {
wl_surface_destroy(output->surface);
}
zxdg_output_v1_destroy(output->xdg_output);
wl_output_destroy(output->output);
destroy_buffer(&output->buffers[0]);
destroy_buffer(&output->buffers[1]);
free_hotspots(&output->hotspots);
free_workspaces(&output->workspaces);
wl_list_remove(&output->link);
free(output->name);
free(output);
}
static void set_output_dirty(struct swaybar_output *output) {
if (output->frame_scheduled) {
output->dirty = true;
} else if (output->surface) {
render_frame(output);
}
}
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *surface,
uint32_t serial, uint32_t width, uint32_t height) {
struct swaybar_output *output = data;
output->width = width;
output->height = height;
zwlr_layer_surface_v1_ack_configure(surface, serial);
set_output_dirty(output);
}
static void layer_surface_closed(void *_output,
struct zwlr_layer_surface_v1 *surface) {
struct swaybar_output *output = _output;
swaybar_output_free(output);
}
struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
static void wl_pointer_enter(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface,
wl_fixed_t surface_x, wl_fixed_t surface_y) {
struct swaybar *bar = data;
struct swaybar_pointer *pointer = &bar->pointer;
struct swaybar_output *output;
wl_list_for_each(output, &bar->outputs, link) {
if (output->surface == surface) {
pointer->current = output;
break;
}
}
int max_scale = 1;
struct swaybar_output *_output;
wl_list_for_each(_output, &bar->outputs, link) {
if (_output->scale > max_scale) {
max_scale = _output->scale;
}
}
wl_surface_set_buffer_scale(pointer->cursor_surface, max_scale);
wl_surface_attach(pointer->cursor_surface,
wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
wl_pointer_set_cursor(wl_pointer, serial, pointer->cursor_surface,
pointer->cursor_image->hotspot_x / max_scale,
pointer->cursor_image->hotspot_y / max_scale);
wl_surface_commit(pointer->cursor_surface);
}
static void wl_pointer_leave(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, struct wl_surface *surface) {
struct swaybar *bar = data;
bar->pointer.current = NULL;
}
static void wl_pointer_motion(void *data, struct wl_pointer *wl_pointer,
uint32_t time, wl_fixed_t surface_x, wl_fixed_t surface_y) {
struct swaybar *bar = data;
bar->pointer.x = wl_fixed_to_int(surface_x);
bar->pointer.y = wl_fixed_to_int(surface_y);
}
static bool check_bindings(struct swaybar *bar, uint32_t x11_button,
uint32_t state) {
bool released = state == WL_POINTER_BUTTON_STATE_RELEASED;
for (int i = 0; i < bar->config->bindings->length; i++) {
struct swaybar_binding *binding = bar->config->bindings->items[i];
if (binding->button == x11_button && binding->release == released) {
ipc_execute_binding(bar, binding);
return true;
}
}
return false;
}
static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
struct swaybar *bar = data;
struct swaybar_pointer *pointer = &bar->pointer;
struct swaybar_output *output = pointer->current;
if (!sway_assert(output, "button with no active output")) {
return;
}
if (check_bindings(bar, wl_button_to_x11_button(button), state)) {
return;
}
if (state != WL_POINTER_BUTTON_STATE_PRESSED) {
return;
}
struct swaybar_hotspot *hotspot;
wl_list_for_each(hotspot, &output->hotspots, link) {
double x = pointer->x * output->scale;
double y = pointer->y * output->scale;
if (x >= hotspot->x
&& y >= hotspot->y
&& x < hotspot->x + hotspot->width
&& y < hotspot->y + hotspot->height) {
if (HOTSPOT_IGNORE == hotspot->callback(output, pointer->x, pointer->y,
wl_button_to_x11_button(button), hotspot->data)) {
return;
}
}
}
}
static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
uint32_t time, uint32_t axis, wl_fixed_t value) {
struct swaybar *bar = data;
struct swaybar_pointer *pointer = &bar->pointer;
struct swaybar_output *output = bar->pointer.current;
if (!sway_assert(output, "axis with no active output")) {
return;
}
// If there is a button press binding, execute it, skip default behavior,
// and check button release bindings
if (check_bindings(bar, wl_axis_to_x11_button(axis, value),
WL_POINTER_BUTTON_STATE_PRESSED)) {
check_bindings(bar, wl_axis_to_x11_button(axis, value),
WL_POINTER_BUTTON_STATE_RELEASED);
return;
}
struct swaybar_hotspot *hotspot;
wl_list_for_each(hotspot, &output->hotspots, link) {
double x = pointer->x * output->scale;
double y = pointer->y * output->scale;
if (x >= hotspot->x
&& y >= hotspot->y
&& x < hotspot->x + hotspot->width
&& y < hotspot->y + hotspot->height) {
if (HOTSPOT_IGNORE == hotspot->callback(
output, pointer->x, pointer->y,
wl_axis_to_x11_button(axis, value), hotspot->data)) {
return;
}
}
}
double amt = wl_fixed_to_double(value);
if (amt == 0.0) {
return;
}
// last doesn't actually need initialization,
// but gcc (7.3.1) is too dumb to figure it out
struct swaybar_workspace *first = NULL;
struct swaybar_workspace *active = NULL;
struct swaybar_workspace *last = NULL;
struct swaybar_workspace *iter;
wl_list_for_each(iter, &output->workspaces, link) {
if (!first) {
first = iter;
}
if (iter->visible) {
active = iter;
}
last = iter;
}
if (!sway_assert(active, "axis with null workspace")) {
return;
}
struct swaybar_workspace *new;
if (amt > 0.0) {
if (active == first) {
if (!bar->config->wrap_scroll) {
return;
}
new = last;
}
new = wl_container_of(active->link.prev, new, link);
} else {
if (active == last) {
if (!bar->config->wrap_scroll) {
return;
}
new = first;
}
new = wl_container_of(active->link.next, new, link);
}
ipc_send_workspace_command(bar, new->name);
// Check button release bindings
check_bindings(bar, wl_axis_to_x11_button(axis, value),
WL_POINTER_BUTTON_STATE_RELEASED);
}
static void wl_pointer_frame(void *data, struct wl_pointer *wl_pointer) {
// Who cares
}
static void wl_pointer_axis_source(void *data, struct wl_pointer *wl_pointer,
uint32_t axis_source) {
// Who cares
}
static void wl_pointer_axis_stop(void *data, struct wl_pointer *wl_pointer,
uint32_t time, uint32_t axis) {
// Who cares
}
static void wl_pointer_axis_discrete(void *data, struct wl_pointer *wl_pointer,
uint32_t axis, int32_t discrete) {
// Who cares
}
struct wl_pointer_listener pointer_listener = {
.enter = wl_pointer_enter,
.leave = wl_pointer_leave,
.motion = wl_pointer_motion,
.button = wl_pointer_button,
.axis = wl_pointer_axis,
.frame = wl_pointer_frame,
.axis_source = wl_pointer_axis_source,
.axis_stop = wl_pointer_axis_stop,
.axis_discrete = wl_pointer_axis_discrete,
};
static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
enum wl_seat_capability caps) {
struct swaybar *bar = data;
if (bar->pointer.pointer != NULL) {
wl_pointer_release(bar->pointer.pointer);
bar->pointer.pointer = NULL;
}
if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
bar->pointer.pointer = wl_seat_get_pointer(wl_seat);
wl_pointer_add_listener(bar->pointer.pointer, &pointer_listener, bar);
}
}
static void seat_handle_name(void *data, struct wl_seat *wl_seat,
const char *name) {
// Who cares
}
const struct wl_seat_listener seat_listener = {
.capabilities = seat_handle_capabilities,
.name = seat_handle_name,
};
static void add_layer_surface(struct swaybar_output *output) {
if (output->layer_surface) {
return;
}
struct swaybar *bar = output->bar;
struct swaybar_config *config = bar->config;
bool hidden = strcmp(config->mode, "hide") == 0;
output->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
bar->layer_shell, output->surface, output->output,
hidden ? ZWLR_LAYER_SHELL_V1_LAYER_TOP :
ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM, "panel");
assert(output->layer_surface);
zwlr_layer_surface_v1_add_listener(output->layer_surface,
&layer_surface_listener, output);
zwlr_layer_surface_v1_set_anchor(output->layer_surface, config->position);
if (hidden) {
zwlr_layer_surface_v1_set_exclusive_zone(output->layer_surface, -1);
}
}
static void destroy_layer_surface(struct swaybar_output *output) {
if (!output->layer_surface) {
return;
}
zwlr_layer_surface_v1_destroy(output->layer_surface);
wl_surface_attach(output->surface, NULL, 0, 0); // detach buffer
output->layer_surface = NULL;
output->width = 0;
output->frame_scheduled = false;
}
bool determine_bar_visibility(struct swaybar *bar, bool moving_layer) {
struct swaybar_config *config = bar->config;
bool visible = !(strcmp(config->mode, "invisible") == 0 ||
(strcmp(config->mode, config->hidden_state) == 0 // both "hide"
&& !bar->visible_by_modifier && !bar->visible_by_urgency));
struct swaybar_output *output;
if (visible == bar->visible) {
if (visible && moving_layer) {
// need to destroy layer surface to move to a different layer
wl_list_for_each(output, &bar->outputs, link) {
destroy_layer_surface(output);
add_layer_surface(output);
}
}
} else {
bar->visible = visible;
wl_list_for_each(output, &bar->outputs, link) {
if (visible) {
add_layer_surface(output);
} else {
destroy_layer_surface(output);
}
}
wlr_log(WLR_DEBUG, "Sending %s signal to status command",
visible ? "cont" : "stop");
kill(bar->status->pid,
visible ? bar->status->cont_signal : bar->status->stop_signal);
}
return visible;
}
static bool bar_uses_output(struct swaybar *bar, const char *name) {
if (bar->config->all_outputs) {
return true;
}
struct config_output *coutput;
wl_list_for_each(coutput, &bar->config->outputs, link) {
if (strcmp(coutput->name, name) == 0) {
return true;
}
}
return false;
}
static void output_geometry(void *data, struct wl_output *wl_output, int32_t x,
int32_t y, int32_t width_mm, int32_t height_mm, int32_t subpixel,
const char *make, const char *model, int32_t transform) {
struct swaybar_output *output = data;
output->subpixel = subpixel;
}
static void output_mode(void *data, struct wl_output *wl_output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh) {
// Who cares
}
static void output_done(void *data, struct wl_output *wl_output) {
struct swaybar_output *output = data;
set_output_dirty(output);
}
static void output_scale(void *data, struct wl_output *wl_output,
int32_t factor) {
struct swaybar_output *output = data;
output->scale = factor;
}
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) {
// Who cares
}
static void xdg_output_handle_logical_size(void *data,
struct zxdg_output_v1 *xdg_output, int32_t width, int32_t height) {
// Who cares
}
static void xdg_output_handle_done(void *data,
struct zxdg_output_v1 *xdg_output) {
struct swaybar_output *output = data;
struct swaybar *bar = output->bar;
assert(output->name != NULL);
if (!bar_uses_output(bar, output->name)) {
swaybar_output_free(output);
return;
}
if (wl_list_empty(&output->link)) {
wl_list_remove(&output->link);
wl_list_insert(&bar->outputs, &output->link);
output->surface = wl_compositor_create_surface(bar->compositor);
assert(output->surface);
if (bar->visible) {
add_layer_surface(output);
}
}
}
static void xdg_output_handle_name(void *data,
struct zxdg_output_v1 *xdg_output, const char *name) {
struct swaybar_output *output = data;
free(output->name);
output->name = strdup(name);
}
static void xdg_output_handle_description(void *data,
struct zxdg_output_v1 *xdg_output, const char *description) {
// Who cares
}
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 add_xdg_output(struct swaybar_output *output) {
if (output->xdg_output != NULL) {
return;
}
assert(output->bar->xdg_output_manager != NULL);
output->xdg_output = zxdg_output_manager_v1_get_xdg_output(
output->bar->xdg_output_manager, output->output);
zxdg_output_v1_add_listener(output->xdg_output, &xdg_output_listener,
output);
}
static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct swaybar *bar = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
bar->compositor = wl_registry_bind(registry, name,
&wl_compositor_interface, 3);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
bar->seat = wl_registry_bind(registry, name,
&wl_seat_interface, 3);
wl_seat_add_listener(bar->seat, &seat_listener, bar);
} else if (strcmp(interface, wl_shm_interface.name) == 0) {
bar->shm = wl_registry_bind(registry, name,
&wl_shm_interface, 1);
} else if (strcmp(interface, wl_output_interface.name) == 0) {
struct swaybar_output *output =
calloc(1, sizeof(struct swaybar_output));
output->bar = bar;
output->output = wl_registry_bind(registry, name,
&wl_output_interface, 3);
wl_output_add_listener(output->output, &output_listener, output);
output->scale = 1;
output->wl_name = name;
wl_list_init(&output->workspaces);
wl_list_init(&output->hotspots);
wl_list_init(&output->link);
if (bar->xdg_output_manager != NULL) {
add_xdg_output(output);
}
} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
bar->layer_shell = wl_registry_bind(
registry, name, &zwlr_layer_shell_v1_interface, 1);
} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
bar->xdg_output_manager = wl_registry_bind(registry, name,
&zxdg_output_manager_v1_interface, 2);
}
}
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
struct swaybar *bar = data;
struct swaybar_output *output, *tmp;
wl_list_for_each_safe(output, tmp, &bar->outputs, link) {
if (output->wl_name == name) {
swaybar_output_free(output);
break;
}
}
}
static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
static void set_bar_dirty(struct swaybar *bar) {
struct swaybar_output *output;
wl_list_for_each(output, &bar->outputs, link) {
set_output_dirty(output);
}
}
bool bar_setup(struct swaybar *bar, const char *socket_path) {
bar_init(bar);
bar->eventloop = loop_create();
bar->ipc_socketfd = ipc_open_socket(socket_path);
bar->ipc_event_socketfd = ipc_open_socket(socket_path);
if (!ipc_initialize(bar)) {
return false;
}
if (bar->config->status_command) {
bar->status = status_line_init(bar->config->status_command);
bar->status->bar = bar;
}
bar->display = wl_display_connect(NULL);
assert(bar->display);
struct wl_registry *registry = wl_display_get_registry(bar->display);
wl_registry_add_listener(registry, &registry_listener, bar);
wl_display_roundtrip(bar->display);
assert(bar->compositor && bar->layer_shell && bar->shm &&
bar->xdg_output_manager);
struct swaybar_output *output;
wl_list_for_each(output, &bar->outputs, link) {
add_xdg_output(output);
}
wl_display_roundtrip(bar->display);
struct swaybar_pointer *pointer = &bar->pointer;
int max_scale = 1;
wl_list_for_each(output, &bar->outputs, link) {
if (output->scale > max_scale) {
max_scale = output->scale;
}
}
pointer->cursor_theme =
wl_cursor_theme_load(NULL, 24 * max_scale, bar->shm);
assert(pointer->cursor_theme);
struct wl_cursor *cursor;
cursor = wl_cursor_theme_get_cursor(pointer->cursor_theme, "left_ptr");
assert(cursor);
pointer->cursor_image = cursor->images[0];
pointer->cursor_surface = wl_compositor_create_surface(bar->compositor);
assert(pointer->cursor_surface);
if (bar->config->workspace_buttons) {
if (ipc_get_workspaces(bar)) {
set_bar_dirty(bar);
}
}
return true;
}
static void display_in(int fd, short mask, void *data) {
struct swaybar *bar = data;
if (wl_display_dispatch(bar->display) == -1) {
bar_teardown(bar);
exit(0);
}
}
static void ipc_in(int fd, short mask, void *data) {
struct swaybar *bar = data;
if (handle_ipc_readable(bar)) {
set_bar_dirty(bar);
}
}
static void status_in(int fd, short mask, void *data) {
struct swaybar *bar = data;
if (mask & (POLLHUP | POLLERR)) {
status_error(bar->status, "[error reading from status command]");
set_bar_dirty(bar);
loop_remove_event(bar->eventloop, bar->status_event);
} else if (status_handle_readable(bar->status)) {
set_bar_dirty(bar);
}
}
void bar_run(struct swaybar *bar) {
loop_add_fd(bar->eventloop, wl_display_get_fd(bar->display), POLLIN,
display_in, bar);
loop_add_fd(bar->eventloop, bar->ipc_event_socketfd, POLLIN, ipc_in, bar);
if (bar->status) {
bar->status_event = loop_add_fd(
bar->eventloop, bar->status->read_fd, POLLIN, status_in, bar);
}
while (1) {
wl_display_flush(bar->display);
loop_poll(bar->eventloop);
}
}
static void free_outputs(struct wl_list *list) {
struct swaybar_output *output, *tmp;
wl_list_for_each_safe(output, tmp, list, link) {
swaybar_output_free(output);
}
}
void bar_teardown(struct swaybar *bar) {
free_outputs(&bar->outputs);
if (bar->config) {
free_config(bar->config);
}
close(bar->ipc_event_socketfd);
close(bar->ipc_socketfd);
if (bar->status) {
status_line_free(bar->status);
}
free(bar->id);
free(bar->mode);
}