sway/swaybar/bar.c

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C
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#include <stdlib.h>
#include <unistd.h>
#include <string.h>
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#include <fcntl.h>
#include <errno.h>
#include <sys/wait.h>
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#include <poll.h>
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#include "swaybar/ipc.h"
#include "swaybar/render.h"
#include "swaybar/config.h"
#include "swaybar/status_line.h"
#include "swaybar/bar.h"
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#include "ipc-client.h"
#include "list.h"
#include "log.h"
static void bar_init(struct bar *bar) {
bar->config = init_config();
bar->status = init_status_line();
bar->outputs = create_list();
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}
static void spawn_status_cmd_proc(struct bar *bar) {
if (bar->config->status_command) {
int pipefd[2];
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if (pipe(pipefd) != 0) {
sway_log(L_ERROR, "Unable to create pipe for status_command fork");
return;
}
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bar->status_command_pid = fork();
if (bar->status_command_pid == 0) {
close(pipefd[0]);
dup2(pipefd[1], STDOUT_FILENO);
close(pipefd[1]);
char *const cmd[] = {
"sh",
"-c",
bar->config->status_command,
NULL,
};
execvp(cmd[0], cmd);
return;
}
close(pipefd[1]);
bar->status_read_fd = pipefd[0];
fcntl(bar->status_read_fd, F_SETFL, O_NONBLOCK);
}
}
struct output *new_output(const char *name) {
struct output *output = malloc(sizeof(struct output));
output->name = strdup(name);
output->window = NULL;
output->registry = NULL;
output->workspaces = create_list();
return output;
}
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static void mouse_button_notify(struct window *window, int x, int y,
uint32_t button, uint32_t state_w) {
sway_log(L_DEBUG, "Mouse button %d clicked at %d %d %d\n", button, x, y, state_w);
if (!state_w) {
return;
}
struct output *clicked_output = NULL;
for (int i = 0; i < swaybar.outputs->length; i++) {
struct output *output = swaybar.outputs->items[i];
if (window == output->window) {
clicked_output = output;
break;
}
}
if (!sway_assert(clicked_output != NULL, "Got pointer event for non-existing output")) {
return;
}
double button_x = 0.5;
for (int i = 0; i < clicked_output->workspaces->length; i++) {
struct workspace *workspace = clicked_output->workspaces->items[i];
int button_width, button_height;
workspace_button_size(window, workspace->name, &button_width, &button_height);
button_x += button_width;
if (x <= button_x) {
ipc_send_workspace_command(workspace->name);
break;
}
}
}
static void mouse_scroll_notify(struct window *window, enum scroll_direction direction) {
sway_log(L_DEBUG, "Mouse wheel scrolled %s", direction == SCROLL_UP ? "up" : "down");
if (!swaybar.config->wrap_scroll) {
// Find output this window lives on
int i;
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struct output *output = NULL;
for (i = 0; i < swaybar.outputs->length; ++i) {
output = swaybar.outputs->items[i];
if (output->window == window) {
break;
}
}
if (!sway_assert(i != swaybar.outputs->length, "Unknown window in scroll event")) {
return;
}
int focused = -1;
for (i = 0; i < output->workspaces->length; ++i) {
struct workspace *ws = output->workspaces->items[i];
if (ws->focused) {
focused = i;
break;
}
}
if (!sway_assert(focused != -1, "Scroll wheel event received on inactive output")) {
return;
}
if ((focused == 0 && direction == SCROLL_UP) ||
(focused == output->workspaces->length - 1 && direction == SCROLL_DOWN)) {
// Do not wrap
return;
}
}
const char *workspace_name = direction == SCROLL_UP ? "prev_on_output" : "next_on_output";
ipc_send_workspace_command(workspace_name);
}
void bar_setup(struct bar *bar, const char *socket_path, const char *bar_id) {
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/* initialize bar with default values */
bar_init(bar);
/* connect to sway ipc */
bar->ipc_socketfd = ipc_open_socket(socket_path);
bar->ipc_event_socketfd = ipc_open_socket(socket_path);
ipc_bar_init(bar, bar_id);
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int i;
for (i = 0; i < bar->outputs->length; ++i) {
struct output *bar_output = bar->outputs->items[i];
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bar_output->registry = registry_poll();
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if (!bar_output->registry->desktop_shell) {
sway_abort("swaybar requires the compositor to support the desktop-shell extension.");
}
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struct output_state *output = bar_output->registry->outputs->items[bar_output->idx];
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bar_output->window = window_setup(bar_output->registry, output->width, 30, false);
if (!bar_output->window) {
sway_abort("Failed to create window.");
}
desktop_shell_set_panel(bar_output->registry->desktop_shell, output->output, bar_output->window->surface);
desktop_shell_set_panel_position(bar_output->registry->desktop_shell, bar->config->position);
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window_make_shell(bar_output->window);
/* set font */
bar_output->window->font = bar->config->font;
/* set mouse event callbacks */
bar_output->window->pointer_input.notify_button = mouse_button_notify;
bar_output->window->pointer_input.notify_scroll = mouse_scroll_notify;
/* set window height */
set_window_height(bar_output->window, bar->config->height);
}
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/* spawn status command */
spawn_status_cmd_proc(bar);
}
void bar_run(struct bar *bar) {
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int pfds = bar->outputs->length + 2;
struct pollfd *pfd = malloc(pfds * sizeof(struct pollfd));
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bool dirty = true;
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pfd[0].fd = bar->ipc_event_socketfd;
pfd[0].events = POLLIN;
pfd[1].fd = bar->status_read_fd;
pfd[1].events = POLLIN;
int i;
for (i = 0; i < bar->outputs->length; ++i) {
struct output *output = bar->outputs->items[i];
pfd[i+2].fd = wl_display_get_fd(output->registry->display);
pfd[i+2].events = POLLIN;
}
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while (1) {
if (dirty) {
int i;
for (i = 0; i < bar->outputs->length; ++i) {
struct output *output = bar->outputs->items[i];
if (window_prerender(output->window) && output->window->cairo) {
render(output, bar->config, bar->status);
window_render(output->window);
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wl_display_flush(output->registry->display);
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}
}
}
dirty = false;
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poll(pfd, pfds, -1);
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if (pfd[0].revents & POLLIN) {
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sway_log(L_DEBUG, "Got IPC event.");
dirty = handle_ipc_event(bar);
}
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if (bar->config->status_command && pfd[1].revents & POLLIN) {
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sway_log(L_DEBUG, "Got update from status command.");
dirty = handle_status_line(bar);
}
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// dispatch wl_display events
for (i = 0; i < bar->outputs->length; ++i) {
struct output *output = bar->outputs->items[i];
if (pfd[i+2].revents & POLLIN) {
if (wl_display_dispatch(output->registry->display) == -1) {
sway_log(L_ERROR, "failed to dispatch wl: %d", errno);
}
} else {
wl_display_dispatch_pending(output->registry->display);
}
}
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}
}
void free_workspaces(list_t *workspaces) {
int i;
for (i = 0; i < workspaces->length; ++i) {
struct workspace *ws = workspaces->items[i];
free(ws->name);
free(ws);
}
list_free(workspaces);
}
static void free_output(struct output *output) {
window_teardown(output->window);
if (output->registry) {
registry_teardown(output->registry);
}
free(output->name);
if (output->workspaces) {
free_workspaces(output->workspaces);
}
free(output);
}
static void free_outputs(list_t *outputs) {
int i;
for (i = 0; i < outputs->length; ++i) {
free_output(outputs->items[i]);
}
list_free(outputs);
}
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static void terminate_status_command(pid_t pid) {
if (pid) {
// terminate status_command process
int ret = kill(pid, SIGTERM);
if (ret != 0) {
sway_log(L_ERROR, "Unable to terminate status_command [pid: %d]", pid);
} else {
int status;
waitpid(pid, &status, 0);
}
}
}
void bar_teardown(struct bar *bar) {
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if (bar->config) {
free_config(bar->config);
}
if (bar->outputs) {
free_outputs(bar->outputs);
}
if (bar->status) {
free_status_line(bar->status);
}
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/* close sockets/pipes */
if (bar->status_read_fd) {
close(bar->status_read_fd);
}
if (bar->ipc_socketfd) {
close(bar->ipc_socketfd);
}
if (bar->ipc_event_socketfd) {
close(bar->ipc_event_socketfd);
}
/* terminate status command process */
terminate_status_command(bar->status_command_pid);
}