sway/swaybar/bar.c

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13 KiB
C
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#define _XOPEN_SOURCE 500
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
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#include <stdlib.h>
#include <string.h>
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#include <sys/wait.h>
#include <unistd.h>
#include <wayland-client.h>
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#include <wayland-cursor.h>
#include <wlr/util/log.h>
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#ifdef __FreeBSD__
#include <dev/evdev/input-event-codes.h>
#else
#include <linux/input-event-codes.h>
#endif
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#include "swaybar/render.h"
#include "swaybar/config.h"
#include "swaybar/event_loop.h"
#include "swaybar/status_line.h"
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#include "swaybar/bar.h"
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#include "swaybar/ipc.h"
#include "ipc-client.h"
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#include "list.h"
#include "log.h"
#include "pango.h"
#include "pool-buffer.h"
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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static void bar_init(struct swaybar *bar) {
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bar->config = init_config();
wl_list_init(&bar->outputs);
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}
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static void swaybar_output_free(struct swaybar_output *output) {
if (!output) {
return;
}
wlr_log(L_DEBUG, "Removing output %s", output->name);
zwlr_layer_surface_v1_destroy(output->layer_surface);
wl_surface_destroy(output->surface);
wl_output_destroy(output->output);
destroy_buffer(&output->buffers[0]);
destroy_buffer(&output->buffers[1]);
struct swaybar_workspace *ws, *ws_tmp;
wl_list_for_each_safe(ws, ws_tmp, &output->workspaces, link) {
wl_list_remove(&ws->link);
free(ws->name);
free(ws);
}
struct swaybar_hotspot *hotspot, *hotspot_tmp;
wl_list_for_each_safe(hotspot, hotspot_tmp, &output->hotspots, link) {
if (hotspot->destroy) {
hotspot->destroy(hotspot->data);
}
free(hotspot);
}
wl_list_remove(&output->link);
free(output->name);
free(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);
render_frame(output->bar, output);
}
static void layer_surface_closed(void *_output,
struct zwlr_layer_surface_v1 *surface) {
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struct swaybar_output *output = _output;
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swaybar_output_free(output);
}
struct zwlr_layer_surface_v1_listener layer_surface_listener = {
.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
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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;
}
}
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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);
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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,
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pointer->cursor_image->hotspot_x / max_scale,
pointer->cursor_image->hotspot_y / max_scale);
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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;
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}
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) {
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struct swaybar *bar = data;
bar->pointer.x = wl_fixed_to_int(surface_x);
bar->pointer.y = wl_fixed_to_int(surface_y);
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}
static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
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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 (state != WL_POINTER_BUTTON_STATE_PRESSED) {
return;
}
struct swaybar_hotspot *hotspot;
wl_list_for_each(hotspot, &output->hotspots, link) {
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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) {
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hotspot->callback(output, pointer->x, pointer->y,
button, hotspot->data);
}
}
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}
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_output *output = bar->pointer.current;
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if (!sway_assert(output, "axis with no active output")) {
return;
}
double amt = wl_fixed_to_double(value);
if (!bar->config->wrap_scroll) {
int i = 0;
struct swaybar_workspace *ws = NULL;
wl_list_for_each(ws, &output->workspaces, link) {
if (ws->focused) {
break;
}
++i;
}
int len = wl_list_length(&output->workspaces);
if (!sway_assert(i != len, "axis with null workspace")) {
return;
}
if (i == 0 && amt > 0) {
return; // Do not wrap
}
if (i == len - 1 && amt < 0) {
return; // Do not wrap
}
}
const char *workspace_name =
amt < 0 ? "prev_on_output" : "next_on_output";
ipc_send_workspace_command(bar, workspace_name);
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}
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 ((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,
};
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static void output_geometry(void *data, struct wl_output *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) {
// Who cares
}
static void output_mode(void *data, struct wl_output *output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh) {
// Who cares
}
static void output_done(void *data, struct wl_output *output) {
// Who cares
}
static void output_scale(void *data, struct wl_output *wl_output,
int32_t factor) {
struct swaybar_output *output = data;
output->scale = factor;
if (output->surface) {
render_frame(output->bar, output);
}
}
struct wl_output_listener output_listener = {
.geometry = output_geometry,
.mode = output_mode,
.done = output_done,
.scale = output_scale,
};
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,
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&wl_compositor_interface, 3);
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} else if (strcmp(interface, wl_seat_interface.name) == 0) {
bar->seat = wl_registry_bind(registry, name,
&wl_seat_interface, 1);
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) {
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static size_t index = 0;
struct swaybar_output *output =
calloc(1, sizeof(struct swaybar_output));
output->bar = bar;
output->output = wl_registry_bind(registry, name,
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&wl_output_interface, 3);
wl_output_add_listener(output->output, &output_listener, output);
output->scale = 1;
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output->index = index++;
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output->wl_name = name;
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wl_list_init(&output->workspaces);
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wl_list_init(&output->hotspots);
wl_list_insert(&bar->outputs, &output->link);
} 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);
}
}
static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
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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,
};
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static void render_all_frames(struct swaybar *bar) {
struct swaybar_output *output;
wl_list_for_each(output, &bar->outputs, link) {
render_frame(bar, output);
}
}
void bar_setup(struct swaybar *bar,
const char *socket_path, const char *bar_id) {
bar_init(bar);
init_event_loop();
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bar->ipc_socketfd = ipc_open_socket(socket_path);
bar->ipc_event_socketfd = ipc_open_socket(socket_path);
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ipc_initialize(bar, bar_id);
if (bar->config->status_command) {
bar->status = status_line_init(bar->config->status_command);
}
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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);
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wl_display_roundtrip(bar->display);
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struct swaybar_pointer *pointer = &bar->pointer;
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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;
}
}
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pointer->cursor_theme = wl_cursor_theme_load(
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NULL, 24 * max_scale, bar->shm);
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assert(pointer->cursor_theme);
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struct wl_cursor *cursor;
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cursor = wl_cursor_theme_get_cursor(pointer->cursor_theme, "left_ptr");
assert(cursor);
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pointer->cursor_image = cursor->images[0];
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pointer->cursor_surface = wl_compositor_create_surface(bar->compositor);
assert(pointer->cursor_surface);
// TODO: we might not necessarily be meant to do all of the outputs
wl_list_for_each(output, &bar->outputs, link) {
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struct config_output *coutput;
wl_list_for_each(coutput, &bar->config->outputs, link) {
if (coutput->index != output->index) {
continue;
}
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output->name = strdup(coutput->name);
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output->surface = wl_compositor_create_surface(bar->compositor);
assert(output->surface);
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output->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
bar->layer_shell, output->surface, output->output,
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,
bar->config->position);
break;
}
}
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ipc_get_workspaces(bar);
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render_all_frames(bar);
}
static void display_in(int fd, short mask, void *_bar) {
struct swaybar *bar = (struct swaybar *)_bar;
if (wl_display_dispatch(bar->display) == -1) {
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bar_teardown(bar);
exit(0);
}
}
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static void ipc_in(int fd, short mask, void *_bar) {
struct swaybar *bar = (struct swaybar *)_bar;
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if (handle_ipc_readable(bar)) {
render_all_frames(bar);
}
}
static void status_in(int fd, short mask, void *_bar) {
struct swaybar *bar = (struct swaybar *)_bar;
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if (status_handle_readable(bar->status)) {
render_all_frames(bar);
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}
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}
void bar_run(struct swaybar *bar) {
add_event(wl_display_get_fd(bar->display), POLLIN, display_in, bar);
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add_event(bar->ipc_event_socketfd, POLLIN, ipc_in, bar);
if (bar->status) {
add_event(bar->status->read_fd, POLLIN, status_in, bar);
}
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while (1) {
event_loop_poll();
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}
}
static void free_outputs(struct wl_list *list) {
struct swaybar_output *output, *tmp;
wl_list_for_each_safe(output, tmp, list, link) {
wl_list_remove(&output->link);
free(output->name);
free(output);
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}
}
void bar_teardown(struct swaybar *bar) {
free_outputs(&bar->outputs);
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if (bar->config) {
free_config(bar->config);
}
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close(bar->ipc_event_socketfd);
close(bar->ipc_socketfd);
if (bar->status) {
status_line_free(bar->status);
}
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}