sway/swaybar/ipc.c

#define _POSIX_C_SOURCE 200809
#include <limits.h>
#include <string.h>
#include <strings.h>
#include <json-c/json.h>
#include <wlr/util/log.h>
#include "swaybar/config.h"
#include "swaybar/ipc.h"
#include "ipc-client.h"
#include "list.h"

void ipc_send_workspace_command(struct swaybar *bar, const char *ws) {
	const char *fmt = "workspace \"%s\"";
	uint32_t size = snprintf(NULL, 0, fmt, ws);
	char command[size];
	snprintf(command, size, fmt, ws);
	ipc_single_command(bar->ipc_socketfd, IPC_COMMAND, command, &size);
}

char *parse_font(const char *font) {
	char *new_font = NULL;
	if (strncmp("pango:", font, 6) == 0) {
		font += 6;
	}
	new_font = strdup(font);
	return new_font;
}

static void ipc_parse_colors(
		struct swaybar_config *config, json_object *colors) {
	json_object *background, *statusline, *separator;
	json_object *focused_background, *focused_statusline, *focused_separator;
	json_object *focused_workspace_border, *focused_workspace_bg, *focused_workspace_text;
	json_object *inactive_workspace_border, *inactive_workspace_bg, *inactive_workspace_text;
	json_object *active_workspace_border, *active_workspace_bg, *active_workspace_text;
	json_object *urgent_workspace_border, *urgent_workspace_bg, *urgent_workspace_text;
	json_object *binding_mode_border, *binding_mode_bg, *binding_mode_text;
	json_object_object_get_ex(colors, "background", &background);
	json_object_object_get_ex(colors, "statusline", &statusline);
	json_object_object_get_ex(colors, "separator", &separator);
	json_object_object_get_ex(colors, "focused_background", &focused_background);
	json_object_object_get_ex(colors, "focused_statusline", &focused_statusline);
	json_object_object_get_ex(colors, "focused_separator", &focused_separator);
	json_object_object_get_ex(colors, "focused_workspace_border", &focused_workspace_border);
	json_object_object_get_ex(colors, "focused_workspace_bg", &focused_workspace_bg);
	json_object_object_get_ex(colors, "focused_workspace_text", &focused_workspace_text);
	json_object_object_get_ex(colors, "active_workspace_border", &active_workspace_border);
	json_object_object_get_ex(colors, "active_workspace_bg", &active_workspace_bg);
	json_object_object_get_ex(colors, "active_workspace_text", &active_workspace_text);
	json_object_object_get_ex(colors, "inactive_workspace_border", &inactive_workspace_border);
	json_object_object_get_ex(colors, "inactive_workspace_bg", &inactive_workspace_bg);
	json_object_object_get_ex(colors, "inactive_workspace_text", &inactive_workspace_text);
	json_object_object_get_ex(colors, "urgent_workspace_border", &urgent_workspace_border);
	json_object_object_get_ex(colors, "urgent_workspace_bg", &urgent_workspace_bg);
	json_object_object_get_ex(colors, "urgent_workspace_text", &urgent_workspace_text);
	json_object_object_get_ex(colors, "binding_mode_border", &binding_mode_border);
	json_object_object_get_ex(colors, "binding_mode_bg", &binding_mode_bg);
	json_object_object_get_ex(colors, "binding_mode_text", &binding_mode_text);
	if (background) {
		config->colors.background = parse_color(
				json_object_get_string(background));
	}
	if (statusline) {
		config->colors.statusline = parse_color(
				json_object_get_string(statusline));
	}
	if (separator) {
		config->colors.separator = parse_color(
				json_object_get_string(separator));
	}
	if (focused_background) {
		config->colors.focused_background = parse_color(
				json_object_get_string(focused_background));
	}
	if (focused_statusline) {
		config->colors.focused_statusline = parse_color(
				json_object_get_string(focused_statusline));
	}
	if (focused_separator) {
		config->colors.focused_separator = parse_color(
				json_object_get_string(focused_separator));
	}
	if (focused_workspace_border) {
		config->colors.focused_workspace.border = parse_color(
				json_object_get_string(focused_workspace_border));
	}
	if (focused_workspace_bg) {
		config->colors.focused_workspace.background = parse_color(
				json_object_get_string(focused_workspace_bg));
	}
	if (focused_workspace_text) {
		config->colors.focused_workspace.text = parse_color(
				json_object_get_string(focused_workspace_text));
	}
	if (active_workspace_border) {
		config->colors.active_workspace.border = parse_color(
				json_object_get_string(active_workspace_border));
	}
	if (active_workspace_bg) {
		config->colors.active_workspace.background = parse_color(
				json_object_get_string(active_workspace_bg));
	}
	if (active_workspace_text) {
		config->colors.active_workspace.text = parse_color(
				json_object_get_string(active_workspace_text));
	}
	if (inactive_workspace_border) {
		config->colors.inactive_workspace.border = parse_color(
				json_object_get_string(inactive_workspace_border));
	}
	if (inactive_workspace_bg) {
		config->colors.inactive_workspace.background = parse_color(
				json_object_get_string(inactive_workspace_bg));
	}
	if (inactive_workspace_text) {
		config->colors.inactive_workspace.text = parse_color(
				json_object_get_string(inactive_workspace_text));
	}
	if (urgent_workspace_border) {
		config->colors.urgent_workspace.border = parse_color(
				json_object_get_string(urgent_workspace_border));
	}
	if (urgent_workspace_bg) {
		config->colors.urgent_workspace.background = parse_color(
				json_object_get_string(urgent_workspace_bg));
	}
	if (urgent_workspace_text) {
		config->colors.urgent_workspace.text = parse_color(
				json_object_get_string(urgent_workspace_text));
	}
	if (binding_mode_border) {
		config->colors.binding_mode.border = parse_color(
				json_object_get_string(binding_mode_border));
	}
	if (binding_mode_bg) {
		config->colors.binding_mode.background = parse_color(
				json_object_get_string(binding_mode_bg));
	}
	if (binding_mode_text) {
		config->colors.binding_mode.text = parse_color(
				json_object_get_string(binding_mode_text));
	}
}

static bool ipc_parse_config(
		struct swaybar_config *config, const char *payload) {
	json_object *bar_config = json_tokener_parse(payload);
	json_object *success;
	if (json_object_object_get_ex(bar_config, "success", &success)
			&& !json_object_get_boolean(success)) {
		wlr_log(WLR_ERROR, "No bar with that ID. Use 'swaymsg -t get_bar_config to get the available bar configs.");
		json_object_put(bar_config);
		return false;
	}
	json_object *markup, *mode, *hidden_state, *position, *status_command;
	json_object *font, *bar_height, *wrap_scroll, *workspace_buttons;
	json_object *strip_workspace_numbers, *strip_workspace_name;
	json_object *binding_mode_indicator, *verbose, *colors, *sep_symbol;
	json_object *outputs, *bindings;
	json_object_object_get_ex(bar_config, "mode", &mode);
	json_object_object_get_ex(bar_config, "hidden_state", &hidden_state);
	json_object_object_get_ex(bar_config, "position", &position);
	json_object_object_get_ex(bar_config, "status_command", &status_command);
	json_object_object_get_ex(bar_config, "font", &font);
	json_object_object_get_ex(bar_config, "bar_height", &bar_height);
	json_object_object_get_ex(bar_config, "wrap_scroll", &wrap_scroll);
	json_object_object_get_ex(bar_config, "workspace_buttons", &workspace_buttons);
	json_object_object_get_ex(bar_config, "strip_workspace_numbers", &strip_workspace_numbers);
	json_object_object_get_ex(bar_config, "strip_workspace_name", &strip_workspace_name);
	json_object_object_get_ex(bar_config, "binding_mode_indicator", &binding_mode_indicator);
	json_object_object_get_ex(bar_config, "verbose", &verbose);
	json_object_object_get_ex(bar_config, "separator_symbol", &sep_symbol);
	json_object_object_get_ex(bar_config, "colors", &colors);
	json_object_object_get_ex(bar_config, "outputs", &outputs);
	json_object_object_get_ex(bar_config, "pango_markup", &markup);
	json_object_object_get_ex(bar_config, "bindings", &bindings);
	if (status_command) {
		free(config->status_command);
		config->status_command = strdup(json_object_get_string(status_command));
	}
	if (position) {
		config->position = parse_position(json_object_get_string(position));
	}
	if (font) {
		free(config->font);
		config->font = parse_font(json_object_get_string(font));
	}
	if (sep_symbol) {
		free(config->sep_symbol);
		config->sep_symbol = strdup(json_object_get_string(sep_symbol));
	}
	if (strip_workspace_numbers) {
		config->strip_workspace_numbers = json_object_get_boolean(strip_workspace_numbers);
	}
	if (strip_workspace_name) {
		config->strip_workspace_name = json_object_get_boolean(strip_workspace_name);
	}
	if (binding_mode_indicator) {
		config->binding_mode_indicator = json_object_get_boolean(binding_mode_indicator);
	}
	if (wrap_scroll) {
		config->wrap_scroll = json_object_get_boolean(wrap_scroll);
	}
	if (workspace_buttons) {
		config->workspace_buttons = json_object_get_boolean(workspace_buttons);
	}
	if (bar_height) {
		config->height = json_object_get_int(bar_height);
	}
	if (markup) {
		config->pango_markup = json_object_get_boolean(markup);
	}
	if (bindings) {
		int length = json_object_array_length(bindings);
		for (int i = 0; i < length; ++i) {
			json_object *bindobj = json_object_array_get_idx(bindings, i);
			struct swaybar_binding *binding =
				calloc(1, sizeof(struct swaybar_binding));
			binding->button = json_object_get_int(
					json_object_object_get(bindobj, "input_code"));
			binding->command = strdup(json_object_get_string(
					json_object_object_get(bindobj, "command")));
			binding->release = json_object_get_boolean(
					json_object_object_get(bindobj, "release"));
			list_add(config->bindings, binding);
		}
	}
	if (hidden_state) {
		free(config->hidden_state);
		config->hidden_state = strdup(json_object_get_string(hidden_state));
	}
	if (mode) {
		free(config->mode);
		config->mode = strdup(json_object_get_string(mode));
	}

	struct config_output *output, *tmp;
	wl_list_for_each_safe(output, tmp, &config->outputs, link) {
		wl_list_remove(&output->link);
		free(output->name);
		free(output);
	}
	if (outputs) {
		int length = json_object_array_length(outputs);
		for (int i = 0; i < length; ++i) {
			json_object *output = json_object_array_get_idx(outputs, i);
			const char *name = json_object_get_string(output);
			if (strcmp("*", name) == 0) {
				config->all_outputs = true;
				break;
			}
			struct config_output *coutput = calloc(
					1, sizeof(struct config_output));
			coutput->name = strdup(name);
			coutput->index = SIZE_MAX;
			wl_list_insert(&config->outputs, &coutput->link);
		}
	} else {
		config->all_outputs = true;
	}

	if (colors) {
		ipc_parse_colors(config, colors);
	}

	json_object_put(bar_config);
	return true;
}

bool ipc_get_workspaces(struct swaybar *bar) {
	struct swaybar_output *output;
	wl_list_for_each(output, &bar->outputs, link) {
		free_workspaces(&output->workspaces);
		output->focused = false;
	}
	uint32_t len = 0;
	char *res = ipc_single_command(bar->ipc_socketfd,
			IPC_GET_WORKSPACES, NULL, &len);
	json_object *results = json_tokener_parse(res);
	if (!results) {
		free(res);
		return false;
	}

	bar->visible_by_urgency = false;
	size_t length = json_object_array_length(results);
	json_object *ws_json;
	json_object *num, *name, *visible, *focused, *out, *urgent;
	for (size_t i = 0; i < length; ++i) {
		ws_json = json_object_array_get_idx(results, i);

		json_object_object_get_ex(ws_json, "num", &num);
		json_object_object_get_ex(ws_json, "name", &name);
		json_object_object_get_ex(ws_json, "visible", &visible);
		json_object_object_get_ex(ws_json, "focused", &focused);
		json_object_object_get_ex(ws_json, "output", &out);
		json_object_object_get_ex(ws_json, "urgent", &urgent);

		wl_list_for_each(output, &bar->outputs, link) {
			const char *ws_output = json_object_get_string(out);
			if (strcmp(ws_output, output->name) == 0) {
				struct swaybar_workspace *ws =
					calloc(1, sizeof(struct swaybar_workspace));
				ws->num = json_object_get_int(num);
				ws->name = strdup(json_object_get_string(name));
				ws->label = strdup(ws->name);
				// ws->num will be -1 if workspace name doesn't begin with int.
				if (ws->num != -1) {
					size_t len_offset = numlen(ws->num);
					if (bar->config->strip_workspace_name) {
						free(ws->label);
						ws->label = malloc(len_offset + 1 * sizeof(char));
						ws->label[len_offset] = '\0';
						strncpy(ws->label, ws->name, len_offset);
					} else if (bar->config->strip_workspace_numbers) {
						len_offset += ws->label[len_offset] == ':';
						if (strlen(ws->name) > len_offset) {
							free(ws->label);
							// Strip number prefix [1-?:] using len_offset.
							ws->label = strdup(ws->name + len_offset);
						}
					}
				}
				ws->visible = json_object_get_boolean(visible);
				ws->focused = json_object_get_boolean(focused);
				if (ws->focused) {
					output->focused = true;
				}
				ws->urgent = json_object_get_boolean(urgent);
				if (ws->urgent) {
					bar->visible_by_urgency = true;
				}
				wl_list_insert(output->workspaces.prev, &ws->link);
			}
		}
	}
	json_object_put(results);
	free(res);
	return determine_bar_visibility(bar, false);
}

static void ipc_get_outputs(struct swaybar *bar) {
	uint32_t len = 0;
	char *res = ipc_single_command(bar->ipc_socketfd,
			IPC_GET_OUTPUTS, NULL, &len);
	json_object *outputs = json_tokener_parse(res);
	for (size_t i = 0; i < json_object_array_length(outputs); ++i) {
		json_object *output = json_object_array_get_idx(outputs, i);
		json_object *output_name, *output_active;
		json_object_object_get_ex(output, "name", &output_name);
		json_object_object_get_ex(output, "active", &output_active);
		const char *name = json_object_get_string(output_name);
		bool active = json_object_get_boolean(output_active);
		if (!active) {
			continue;
		}
		if (bar->config->all_outputs) {
			struct config_output *coutput =
				calloc(1, sizeof(struct config_output));
			coutput->name = strdup(name);
			coutput->index = i;
			wl_list_insert(&bar->config->outputs, &coutput->link);
		} else {
			struct config_output *coutput;
			wl_list_for_each(coutput, &bar->config->outputs, link) {
				if (strcmp(name, coutput->name) == 0) {
					coutput->index = i;
					break;
				}
			}
		}
	}
	json_object_put(outputs);
	free(res);
}

void ipc_execute_binding(struct swaybar *bar, struct swaybar_binding *bind) {
	wlr_log(WLR_DEBUG, "Executing binding for button %u (release=%d): `%s`",
			bind->button, bind->release, bind->command);
	uint32_t len = strlen(bind->command);
	free(ipc_single_command(bar->ipc_socketfd,
			IPC_COMMAND, bind->command, &len));
}

bool ipc_initialize(struct swaybar *bar) {
	uint32_t len = strlen(bar->id);
	char *res = ipc_single_command(bar->ipc_socketfd,
			IPC_GET_BAR_CONFIG, bar->id, &len);
	if (!ipc_parse_config(bar->config, res)) {
		free(res);
		return false;
	}
	free(res);
	ipc_get_outputs(bar);

	struct swaybar_config *config = bar->config;
	char subscribe[128]; // suitably large buffer
	len = snprintf(subscribe, 128,
			"[ \"barconfig_update\" , \"bar_state_update\" %s %s ]",
			config->binding_mode_indicator ? ", \"mode\"" : "",
			config->workspace_buttons ? ", \"workspace\"" : "");
	free(ipc_single_command(bar->ipc_event_socketfd,
			IPC_SUBSCRIBE, subscribe, &len));
	return true;
}

static bool handle_bar_state_update(struct swaybar *bar, json_object *event) {
	json_object *json_id;
	json_object_object_get_ex(event, "id", &json_id);
	const char *id = json_object_get_string(json_id);
	if (strcmp(id, bar->id) != 0) {
		return false;
	}

	json_object *visible_by_modifier;
	json_object_object_get_ex(event, "visible_by_modifier", &visible_by_modifier);
	bar->visible_by_modifier = json_object_get_boolean(visible_by_modifier);
	return determine_bar_visibility(bar, false);
}

static bool handle_barconfig_update(struct swaybar *bar,
		json_object *json_config) {
	json_object *json_id;
	json_object_object_get_ex(json_config, "id", &json_id);
	const char *id = json_object_get_string(json_id);
	if (strcmp(id, bar->id) != 0) {
		return false;
	}

	struct swaybar_config *config = bar->config;

	json_object *json_state;
	json_object_object_get_ex(json_config, "hidden_state", &json_state);
	const char *new_state = json_object_get_string(json_state);
	char *old_state = config->hidden_state;
	if (strcmp(new_state, old_state) != 0) {
		wlr_log(WLR_DEBUG, "Changing bar hidden state to %s", new_state);
		free(old_state);
		config->hidden_state = strdup(new_state);
		return determine_bar_visibility(bar, false);
	}

	free(config->mode);
	json_object *json_mode;
	json_object_object_get_ex(json_config, "mode", &json_mode);
	config->mode = strdup(json_object_get_string(json_mode));
	wlr_log(WLR_DEBUG, "Changing bar mode to %s", config->mode);

	return determine_bar_visibility(bar, true);
}

bool handle_ipc_readable(struct swaybar *bar) {
	struct ipc_response *resp = ipc_recv_response(bar->ipc_event_socketfd);
	if (!resp) {
		return false;
	}

	json_object *result = json_tokener_parse(resp->payload);
	if (!result) {
		wlr_log(WLR_ERROR, "failed to parse payload as json");
		free_ipc_response(resp);
		return false;
	}

	bool bar_is_dirty = true;
	switch (resp->type) {
	case IPC_EVENT_WORKSPACE:
		bar_is_dirty = ipc_get_workspaces(bar);
		break;
	case IPC_EVENT_MODE: {
		json_object *json_change, *json_pango_markup;
		if (json_object_object_get_ex(result, "change", &json_change)) {
			const char *change = json_object_get_string(json_change);
			free(bar->mode);
			bar->mode = strcmp(change, "default") != 0 ? strdup(change) : NULL;
		} else {
			wlr_log(WLR_ERROR, "failed to parse response");
			bar_is_dirty = false;
			break;
		}
		if (json_object_object_get_ex(result,
					"pango_markup", &json_pango_markup)) {
			bar->mode_pango_markup = json_object_get_boolean(json_pango_markup);
		}
		break;
	}
	case IPC_EVENT_BARCONFIG_UPDATE:
		bar_is_dirty = handle_barconfig_update(bar, result);
		break;
	case IPC_EVENT_BAR_STATE_UPDATE:
		bar_is_dirty = handle_bar_state_update(bar, result);
		break;
	default:
		bar_is_dirty = false;
		break;
	}
	json_object_put(result);
	free_ipc_response(resp);
	return bar_is_dirty;
}