Merge pull request #1648 from swaywm/swaybar-layers

Port swaybar to layer shell

1 files changed, 238 insertions, 0 deletions

diff --git a/sway/config/bar.c b/sway/config/bar.c
new file mode 100644
index 00000000..48b2fc7c
--- /dev/null
+++ b/sway/config/bar.c
@@ -0,0 +1,238 @@
+#define _POSIX_C_SOURCE 200809L
+#define _XOPEN_SOURCE 700
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <wordexp.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <signal.h>
+#include <strings.h>
+#include "sway/config.h"
+#include "stringop.h"
+#include "list.h"
+#include "log.h"
+
+static void terminate_swaybar(pid_t pid) {
+	int ret = kill(pid, SIGTERM);
+	if (ret != 0) {
+		wlr_log_errno(L_ERROR, "Unable to terminate swaybar %d", pid);
+	} else {
+		int status;
+		waitpid(pid, &status, 0);
+	}
+}
+
+void free_bar_config(struct bar_config *bar) {
+	if (!bar) {
+		return;
+	}
+	free(bar->mode);
+	free(bar->position);
+	free(bar->hidden_state);
+	free(bar->status_command);
+	free(bar->font);
+	free(bar->separator_symbol);
+	// TODO: Free mouse bindings
+	list_free(bar->bindings);
+	if (bar->outputs) {
+		free_flat_list(bar->outputs);
+	}
+	if (bar->pid != 0) {
+		terminate_swaybar(bar->pid);
+	}
+	free(bar->colors.background);
+	free(bar->colors.statusline);
+	free(bar->colors.separator);
+	free(bar->colors.focused_background);
+	free(bar->colors.focused_statusline);
+	free(bar->colors.focused_separator);
+	free(bar->colors.focused_workspace_border);
+	free(bar->colors.focused_workspace_bg);
+	free(bar->colors.focused_workspace_text);
+	free(bar->colors.active_workspace_border);
+	free(bar->colors.active_workspace_bg);
+	free(bar->colors.active_workspace_text);
+	free(bar->colors.inactive_workspace_border);
+	free(bar->colors.inactive_workspace_bg);
+	free(bar->colors.inactive_workspace_text);
+	free(bar->colors.urgent_workspace_border);
+	free(bar->colors.urgent_workspace_bg);
+	free(bar->colors.urgent_workspace_text);
+	free(bar->colors.binding_mode_border);
+	free(bar->colors.binding_mode_bg);
+	free(bar->colors.binding_mode_text);
+	free(bar);
+}
+
+struct bar_config *default_bar_config(void) {
+	struct bar_config *bar = NULL;
+	bar = malloc(sizeof(struct bar_config));
+	if (!bar) {
+		return NULL;
+	}
+	if (!(bar->mode = strdup("dock"))) goto cleanup;
+	if (!(bar->hidden_state = strdup("hide"))) goto cleanup;
+	bar->outputs = NULL;
+	bar->position = strdup("bottom");
+	if (!(bar->bindings = create_list())) goto cleanup;
+	if (!(bar->status_command = strdup("while :; do date +'%Y-%m-%d %l:%M:%S %p'; sleep 1; done"))) goto cleanup;
+	bar->pango_markup = false;
+	bar->swaybar_command = NULL;
+	bar->font = NULL;
+	bar->height = -1;
+	bar->workspace_buttons = true;
+	bar->wrap_scroll = false;
+	bar->separator_symbol = NULL;
+	bar->strip_workspace_numbers = false;
+	bar->binding_mode_indicator = true;
+	bar->verbose = false;
+	bar->pid = 0;
+	// set default colors
+	if (!(bar->colors.background = strndup("#000000ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.statusline = strndup("#ffffffff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.separator = strndup("#666666ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.focused_workspace_border = strndup("#4c7899ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.focused_workspace_bg = strndup("#285577ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.focused_workspace_text = strndup("#ffffffff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.active_workspace_border = strndup("#333333ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.active_workspace_bg = strndup("#5f676aff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.active_workspace_text = strndup("#ffffffff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.inactive_workspace_border = strndup("#333333ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.inactive_workspace_bg = strndup("#222222ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.inactive_workspace_text = strndup("#888888ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.urgent_workspace_border = strndup("#2f343aff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.urgent_workspace_bg = strndup("#900000ff", 9))) {
+		goto cleanup;
+	}
+	if (!(bar->colors.urgent_workspace_text = strndup("#ffffffff", 9))) {
+		goto cleanup;
+	}
+	// if the following colors stay undefined, they fall back to background,
+	// statusline, separator and urgent_workspace_*.
+	bar->colors.focused_background = NULL;
+	bar->colors.focused_statusline = NULL;
+	bar->colors.focused_separator = NULL;
+	bar->colors.binding_mode_border = NULL;
+	bar->colors.binding_mode_bg = NULL;
+	bar->colors.binding_mode_text = NULL;
+
+	list_add(config->bars, bar);
+	return bar;
+cleanup:
+	free_bar_config(bar);
+	return NULL;
+}
+
+void invoke_swaybar(struct bar_config *bar) {
+	// Pipe to communicate errors
+	int filedes[2];
+	if (pipe(filedes) == -1) {
+		wlr_log(L_ERROR, "Pipe setup failed! Cannot fork into bar");
+		return;
+	}
+
+	bar->pid = fork();
+	if (bar->pid == 0) {
+		close(filedes[0]);
+
+		// run custom swaybar
+		size_t len = snprintf(NULL, 0, "%s -b %s",
+				bar->swaybar_command ? bar->swaybar_command : "swaybar",
+				bar->id);
+		char *command = malloc(len + 1);
+		if (!command) {
+			const char msg[] = "Unable to allocate swaybar command string";
+			size_t len = sizeof(msg);
+			if (write(filedes[1], &len, sizeof(int))) {};
+			if (write(filedes[1], msg, len)) {};
+			close(filedes[1]);
+			exit(1);
+		}
+		snprintf(command, len + 1, "%s -b %s",
+				bar->swaybar_command ? bar->swaybar_command : "swaybar",
+				bar->id);
+		char *const cmd[] = { "sh", "-c", command, NULL, };
+		close(filedes[1]);
+		execvp(cmd[0], cmd);
+		exit(1);
+	}
+	close(filedes[0]);
+	ssize_t len;
+	if (read(filedes[1], &len, sizeof(int)) == sizeof(int)) {
+		char *buf = malloc(len);
+		if(!buf) {
+			wlr_log(L_ERROR, "Cannot allocate error string");
+			return;
+		}
+		if (read(filedes[1], buf, len)) {
+			wlr_log(L_ERROR, "%s", buf);
+		}
+		free(buf);
+	}
+	close(filedes[1]);
+}
+
+static bool active_output(const char *name) {
+	struct sway_container *cont = NULL;
+	for (int i = 0; i < root_container.children->length; ++i) {
+		cont = root_container.children->items[i];
+		if (cont->type == C_OUTPUT && strcasecmp(name, cont->name) == 0) {
+			return true;
+		}
+	}
+	return false;
+}
+
+void load_swaybars() {
+	for (int i = 0; i < config->bars->length; ++i) {
+		struct bar_config *bar = config->bars->items[i];
+		bool apply = false;
+		if (bar->outputs) {
+			for (int j = 0; j < bar->outputs->length; ++j) {
+				char *o = bar->outputs->items[j];
+				if (!strcmp(o, "*") || active_output(o)) {
+					apply = true;
+					break;
+				}
+			}
+		} else {
+			apply = true;
+		}
+		if (apply) {
+			if (bar->pid != 0) {
+				terminate_swaybar(bar->pid);
+			}
+			wlr_log(L_DEBUG, "Invoking swaybar for bar id '%s'", bar->id);
+			invoke_swaybar(bar);
+		}
+	}
+}