1 files changed, 240 insertions, 0 deletions

diff --git a/sway/config/bar.c b/sway/config/bar.c
new file mode 100644
index 00000000..2913f059
--- /dev/null
+++ b/sway/config/bar.c
@@ -0,0 +1,240 @@
+#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) {
+        wlr_log(L_DEBUG, "Terminating swaybar %d", 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);
+        }
+        wlr_log(L_DEBUG, "Spawned swaybar %d", bar->pid);
+        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);
+                }
+        }
+}