Merge pull request #2366 from RedSoxFan/nagbar

Implement swaynag

8 files changed, 1674 insertions, 0 deletions

diff --git a/swaynag/config.c b/swaynag/config.c
new file mode 100644
index 00000000..d6c5739d
--- /dev/null
+++ b/swaynag/config.c
@@ -0,0 +1,401 @@
+#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200112L
+#include <getopt.h>
+#include <stdlib.h>
+#include <wordexp.h>
+#include "log.h"
+#include "list.h"
+#include "readline.h"
+#include "swaynag/swaynag.h"
+#include "swaynag/types.h"
+#include "util.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
+
+static char *read_from_stdin() {
+	char *buffer = NULL;
+	while (!feof(stdin)) {
+		char *line = read_line(stdin);
+		if (!line) {
+			continue;
+		}
+
+		size_t curlen = buffer ? strlen(buffer) : 0;
+		buffer = realloc(buffer, curlen + strlen(line) + 2);
+		snprintf(buffer + curlen, strlen(line) + 2, "%s\n", line);
+
+		free(line);
+	}
+
+	while (buffer && buffer[strlen(buffer) - 1] == '\n') {
+		buffer[strlen(buffer) - 1] = '\0';
+	}
+
+	return buffer;
+}
+
+int swaynag_parse_options(int argc, char **argv, struct swaynag *swaynag,
+		list_t *types, struct swaynag_type *type, char **config, bool *debug) {
+	enum type_options {
+		TO_COLOR_BACKGROUND = 256,
+		TO_COLOR_BORDER,
+		TO_COLOR_BORDER_BOTTOM,
+		TO_COLOR_BUTTON,
+		TO_COLOR_TEXT,
+		TO_THICK_BAR_BORDER,
+		TO_PADDING_MESSAGE,
+		TO_THICK_DET_BORDER,
+		TO_THICK_BTN_BORDER,
+		TO_GAP_BTN,
+		TO_GAP_BTN_DISMISS,
+		TO_MARGIN_BTN_RIGHT,
+		TO_PADDING_BTN,
+	};
+
+	static struct option opts[] = {
+		{"button", required_argument, NULL, 'b'},
+		{"config", required_argument, NULL, 'c'},
+		{"debug", no_argument, NULL, 'd'},
+		{"edge", required_argument, NULL, 'e'},
+		{"font", required_argument, NULL, 'f'},
+		{"help", no_argument, NULL, 'h'},
+		{"detailed-message", no_argument, NULL, 'l'},
+		{"detailed-button", required_argument, NULL, 'L'},
+		{"message", required_argument, NULL, 'm'},
+		{"output", required_argument, NULL, 'o'},
+		{"dismiss-button", required_argument, NULL, 's'},
+		{"type", required_argument, NULL, 't'},
+		{"version", no_argument, NULL, 'v'},
+
+		{"background", required_argument, NULL, TO_COLOR_BACKGROUND},
+		{"border", required_argument, NULL, TO_COLOR_BORDER},
+		{"border-bottom", required_argument, NULL, TO_COLOR_BORDER_BOTTOM},
+		{"button-background", required_argument, NULL, TO_COLOR_BUTTON},
+		{"text", required_argument, NULL, TO_COLOR_TEXT},
+		{"border-bottom-size", required_argument, NULL, TO_THICK_BAR_BORDER},
+		{"message-padding", required_argument, NULL, TO_PADDING_MESSAGE},
+		{"details-border-size", required_argument, NULL, TO_THICK_DET_BORDER},
+		{"button-border-size", required_argument, NULL, TO_THICK_BTN_BORDER},
+		{"button-gap", required_argument, NULL, TO_GAP_BTN},
+		{"button-dismiss-gap", required_argument, NULL, TO_GAP_BTN_DISMISS},
+		{"button-margin-right", required_argument, NULL, TO_MARGIN_BTN_RIGHT},
+		{"button-padding", required_argument, NULL, TO_PADDING_BTN},
+
+		{0, 0, 0, 0}
+	};
+
+	const char *usage =
+		"Usage: swaynag [options...]\n"
+		"\n"
+		"  -b, --button <text> <action>  Create a button with text that "
+			"executes action when pressed. Multiple buttons can be defined.\n"
+		"  -c, --config <path>           Path to config file.\n"
+		"  -d, --debug                   Enable debugging.\n"
+		"  -e, --edge top|bottom         Set the edge to use.\n"
+		"  -f, --font <font>             Set the font to use.\n"
+		"  -h, --help                    Show help message and quit.\n"
+		"  -l, --detailed-message        Read a detailed message from stdin.\n"
+		"  -L, --detailed-button <text>  Set the text of the detail button.\n"
+		"  -m, --message <msg>           Set the message text.\n"
+		"  -o, --output <output>         Set the output to use.\n"
+		"  -s, --dismiss-button <text>   Set the dismiss button text.\n"
+		"  -t, --type <type>             Set the message type.\n"
+		"  -v, --version                 Show the version number and quit.\n"
+		"\n"
+		"The following appearance options can also be given:\n"
+		"  --background RRGGBB[AA]       Background color.\n"
+		"  --border RRGGBB[AA]           Border color.\n"
+		"  --border-bottom RRGGBB[AA]    Bottom border color.\n"
+		"  --button-background RRGGBB[AA]           Button background color.\n"
+		"  --text RRGGBB[AA]             Text color.\n"
+		"  --border-bottom-size size     Thickness of the bar border.\n"
+		"  --message-padding padding     Padding for the message.\n"
+		"  --details-border-size size    Thickness for the details border.\n"
+		"  --button-border-size size     Thickness for the button border.\n"
+		"  --button-gap gap              Size of the gap between buttons\n"
+		"  --button-dismiss-gap gap      Size of the gap for dismiss button.\n"
+		"  --button-margin-right margin  Margin from dismiss button to edge.\n"
+		"  --button-padding padding      Padding for the button text.\n";
+
+	optind = 1;
+	while (1) {
+		int c = getopt_long(argc, argv, "b:c:de:f:hlL:m:o:s:t:v", opts, NULL);
+		if (c == -1) {
+			break;
+		}
+		switch (c) {
+		case 'b': // Button
+			if (swaynag) {
+				if (optind >= argc) {
+					fprintf(stderr, "Missing action for button %s\n", optarg);
+					return EXIT_FAILURE;
+				}
+				struct swaynag_button *button;
+				button = calloc(sizeof(struct swaynag_button), 1);
+				button->text = strdup(optarg);
+				button->type = SWAYNAG_ACTION_COMMAND;
+				button->action = strdup(argv[optind]);
+				list_add(swaynag->buttons, button);
+			}
+			optind++;
+			break;
+		case 'c': // Config
+			if (config) {
+				*config = strdup(optarg);
+			}
+			break;
+		case 'd': // Debug
+			if (debug) {
+				*debug = true;
+			}
+			break;
+		case 'e': // Edge
+			if (type) {
+				if (strcmp(optarg, "top") == 0) {
+					type->anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
+						| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+						| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
+				} else if (strcmp(optarg, "bottom") == 0) {
+					type->anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM
+						| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+						| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
+				} else {
+					fprintf(stderr, "Invalid edge: %s\n", optarg);
+					return EXIT_FAILURE;
+				}
+			}
+			break;
+		case 'f': // Font
+			if (type) {
+				free(type->font);
+				type->font = strdup(optarg);
+			}
+			break;
+		case 'l': // Detailed Message
+			if (swaynag) {
+				free(swaynag->details.message);
+				swaynag->details.message = read_from_stdin();
+				swaynag->details.button_up.text = strdup("▲");
+				swaynag->details.button_down.text = strdup("▼");
+			}
+			break;
+		case 'L': // Detailed Button Text
+			if (swaynag) {
+				free(swaynag->details.button_details.text);
+				swaynag->details.button_details.text = strdup(optarg);
+			}
+			break;
+		case 'm': // Message
+			if (swaynag) {
+				free(swaynag->message);
+				swaynag->message = strdup(optarg);
+			}
+			break;
+		case 'o': // Output
+			if (type) {
+				free(type->output);
+				type->output = strdup(optarg);
+			}
+			break;
+		case 's': // Dismiss Button Text
+			if (swaynag) {
+				struct swaynag_button *button_close;
+				button_close = swaynag->buttons->items[0];
+				free(button_close->text);
+				button_close->text = strdup(optarg);
+			}
+			break;
+		case 't': // Type
+			if (swaynag) {
+				swaynag->type = swaynag_type_get(types, optarg);
+				if (!swaynag->type) {
+					fprintf(stderr, "Unknown type %s\n", optarg);
+					return EXIT_FAILURE;
+				}
+			}
+			break;
+		case 'v': // Version
+			fprintf(stdout, "swaynag version " SWAY_VERSION "\n");
+			return -1;
+		case TO_COLOR_BACKGROUND: // Background color
+			if (type) {
+				type->background = parse_color(optarg);
+			}
+			break;
+		case TO_COLOR_BORDER: // Border color
+			if (type) {
+				type->border = parse_color(optarg);
+			}
+			break;
+		case TO_COLOR_BORDER_BOTTOM: // Bottom border color
+			if (type) {
+				type->border_bottom = parse_color(optarg);
+			}
+			break;
+		case TO_COLOR_BUTTON:  // Button background color
+			if (type) {
+				type->button_background = parse_color(optarg);
+			}
+			break;
+		case TO_COLOR_TEXT:  // Text color
+			if (type) {
+				type->text = parse_color(optarg);
+			}
+			break;
+		case TO_THICK_BAR_BORDER:  // Bottom border thickness
+			if (type) {
+				type->bar_border_thickness = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_PADDING_MESSAGE:  // Message padding
+			if (type) {
+				type->message_padding = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_THICK_DET_BORDER:  // Details border thickness
+			if (type) {
+				type->details_border_thickness = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_THICK_BTN_BORDER:  // Button border thickness
+			if (type) {
+				type->button_border_thickness = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_GAP_BTN: // Gap between buttons
+			if (type) {
+				type->button_gap = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_GAP_BTN_DISMISS:  // Gap between dismiss button
+			if (type) {
+				type->button_gap_close = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_MARGIN_BTN_RIGHT:  // Margin on the right side of button area
+			if (type) {
+				type->button_margin_right = strtol(optarg, NULL, 0);
+			}
+			break;
+		case TO_PADDING_BTN:  // Padding for the button text
+			if (type) {
+				type->button_padding = strtol(optarg, NULL, 0);
+			}
+			break;
+		default: // Help or unknown flag
+			fprintf(c == 'h' ? stdout : stderr, "%s", usage);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static bool file_exists(const char *path) {
+	return path && access(path, R_OK) != -1;
+}
+
+char *swaynag_get_config_path(void) {
+	static const char *config_paths[] = {
+		"$HOME/.swaynag/config",
+		"$XDG_CONFIG_HOME/swaynag/config",
+		SYSCONFDIR "/swaynag/config",
+	};
+
+	if (!getenv("XDG_CONFIG_HOME")) {
+		char *home = getenv("HOME");
+		char *config_home = malloc(strlen(home) + strlen("/.config") + 1);
+		if (!config_home) {
+			wlr_log(WLR_ERROR, "Unable to allocate $HOME/.config");
+		} else {
+			strcpy(config_home, home);
+			strcat(config_home, "/.config");
+			setenv("XDG_CONFIG_HOME", config_home, 1);
+			wlr_log(WLR_DEBUG, "Set XDG_CONFIG_HOME to %s", config_home);
+			free(config_home);
+		}
+	}
+
+	wordexp_t p;
+	char *path;
+	for (size_t i = 0; i < sizeof(config_paths) / sizeof(char *); ++i) {
+		if (wordexp(config_paths[i], &p, 0) == 0) {
+			path = strdup(p.we_wordv[0]);
+			wordfree(&p);
+			if (file_exists(path)) {
+				return path;
+			}
+			free(path);
+		}
+	}
+
+	return NULL;
+}
+
+int swaynag_load_config(char *path, struct swaynag *swaynag, list_t *types) {
+	FILE *config = fopen(path, "r");
+	if (!config) {
+		fprintf(stderr, "Failed to read config. Running without it.\n");
+		return 0;
+	}
+
+	struct swaynag_type *type;
+	type = calloc(1, sizeof(struct swaynag_type));
+	type->name = strdup("<config>");
+	list_add(types, type);
+
+	char *line;
+	int line_number = 0;
+	while (!feof(config)) {
+		line = read_line(config);
+		if (!line) {
+			continue;
+		}
+
+		line_number++;
+		if (line[0] == '#') {
+			free(line);
+			continue;
+		}
+		if (strlen(line) == 0) {
+			free(line);
+			continue;
+		}
+
+		if (line[0] == '[') {
+			char *close = strchr(line, ']');
+			if (!close) {
+				free(line);
+				fclose(config);
+				fprintf(stderr, "Closing bracket not found on line %d\n",
+						line_number);
+				return 1;
+			}
+			char *name = calloc(1, close - line);
+			strncat(name, line + 1, close - line - 1);
+			type = swaynag_type_get(types, name);
+			if (!type) {
+				type = calloc(1, sizeof(struct swaynag_type));
+				type->name = strdup(name);
+				list_add(types, type);
+			}
+			free(name);
+		} else {
+			char flag[strlen(line) + 3];
+			sprintf(flag, "--%s", line);
+			char *argv[] = {"swaynag", flag};
+			int result;
+			result = swaynag_parse_options(2, argv, swaynag, types, type,
+					NULL, NULL);
+			if (result != 0) {
+				free(line);
+				fclose(config);
+				return result;
+			}
+		}
+
+		free(line);
+	}
+	fclose(config);
+	return 0;
+}
+
diff --git a/swaynag/main.c b/swaynag/main.c
new file mode 100644
index 00000000..854368e5
--- /dev/null
+++ b/swaynag/main.c
@@ -0,0 +1,129 @@
+#define _XOPEN_SOURCE 500
+#include <signal.h>
+#include "log.h"
+#include "list.h"
+#include "swaynag/config.h"
+#include "swaynag/swaynag.h"
+#include "swaynag/types.h"
+
+static struct swaynag swaynag;
+
+void sig_handler(int signal) {
+	swaynag_destroy(&swaynag);
+	exit(EXIT_FAILURE);
+}
+
+void sway_terminate(int code) {
+	swaynag_destroy(&swaynag);
+	exit(code);
+}
+
+int main(int argc, char **argv) {
+	int exit_code = EXIT_SUCCESS;
+
+	list_t *types = create_list();
+	swaynag_types_add_default(types);
+
+	memset(&swaynag, 0, sizeof(swaynag));
+	swaynag.buttons = create_list();
+
+	struct swaynag_button *button_close =
+		calloc(sizeof(struct swaynag_button), 1);
+	button_close->text = strdup("X");
+	button_close->type = SWAYNAG_ACTION_DISMISS;
+	list_add(swaynag.buttons, button_close);
+
+	swaynag.details.button_details.text = strdup("Toggle Details");
+	swaynag.details.button_details.type = SWAYNAG_ACTION_EXPAND;
+
+
+	char *config_path = NULL;
+	bool debug = false;
+	int launch_status = swaynag_parse_options(argc, argv, NULL, NULL, NULL,
+			&config_path, &debug);
+	if (launch_status != 0)  {
+		exit_code = launch_status;
+		goto cleanup;
+	}
+	wlr_log_init(debug ? WLR_DEBUG : WLR_ERROR, NULL);
+
+	if (!config_path) {
+		config_path = swaynag_get_config_path();
+	}
+	if (config_path) {
+		wlr_log(WLR_DEBUG, "Loading config file: %s", config_path);
+		int config_status = swaynag_load_config(config_path, &swaynag, types);
+		free(config_path);
+		if (config_status != 0) {
+			exit_code = config_status;
+			goto cleanup;
+		}
+	}
+
+	if (argc > 1) {
+		struct swaynag_type *type_args;
+		type_args = calloc(1, sizeof(struct swaynag_type));
+		type_args->name = strdup("<args>");
+		list_add(types, type_args);
+
+		int result = swaynag_parse_options(argc, argv, &swaynag, types,
+				type_args, NULL, NULL);
+		if (result != 0) {
+			exit_code = result;
+			goto cleanup;
+		}
+	}
+
+	if (!swaynag.message) {
+		wlr_log(WLR_ERROR, "No message passed. Please provide --message/-m");
+		exit_code = EXIT_FAILURE;
+		goto cleanup;
+	}
+
+	if (!swaynag.type) {
+		swaynag.type = swaynag_type_get(types, "error");
+	}
+
+	// Construct a new type using the config defaults as base, then merging
+	// config type defaults on top, then merging arguments on top of that, and
+	// finally merging defaults on top.
+	struct swaynag_type *type = calloc(1, sizeof(struct swaynag_type));
+	type->name = strdup(swaynag.type->name);
+	swaynag_type_merge(type, swaynag_type_get(types, "<args>"));
+	swaynag_type_merge(type, swaynag.type);
+	swaynag_type_merge(type, swaynag_type_get(types, "<config>"));
+	swaynag_type_merge(type, swaynag_type_get(types, "<defaults>"));
+	swaynag.type = type;
+
+	swaynag_types_free(types);
+
+	if (swaynag.details.message) {
+		list_add(swaynag.buttons, &swaynag.details.button_details);
+	} else {
+		free(swaynag.details.button_details.text);
+	}
+
+	wlr_log(WLR_DEBUG, "Output: %s", swaynag.type->output);
+	wlr_log(WLR_DEBUG, "Anchors: %d", swaynag.type->anchors);
+	wlr_log(WLR_DEBUG, "Type: %s", swaynag.type->name);
+	wlr_log(WLR_DEBUG, "Message: %s", swaynag.message);
+	wlr_log(WLR_DEBUG, "Font: %s", swaynag.type->font);
+	wlr_log(WLR_DEBUG, "Buttons");
+	for (int i = 0; i < swaynag.buttons->length; i++) {
+		struct swaynag_button *button = swaynag.buttons->items[i];
+		wlr_log(WLR_DEBUG, "\t[%s] `%s`", button->text, button->action);
+	}
+
+	signal(SIGTERM, sig_handler);
+
+	swaynag_setup(&swaynag);
+	swaynag_run(&swaynag);
+	return exit_code;
+
+cleanup:
+	swaynag_types_free(types);
+	free(swaynag.details.button_details.text);
+	swaynag_destroy(&swaynag);
+	return exit_code;
+}
+
diff --git a/swaynag/meson.build b/swaynag/meson.build
new file mode 100644
index 00000000..2ba3ed95
--- /dev/null
+++ b/swaynag/meson.build
@@ -0,0 +1,23 @@
+executable(
+	'swaynag', [
+		'config.c',
+		'main.c',
+		'render.c',
+		'swaynag.c',
+		'types.c',
+	],
+	include_directories: [sway_inc],
+	dependencies: [
+		cairo,
+		client_protos,
+		gdk_pixbuf,
+		math,
+		pango,
+		pangocairo,
+		wayland_client,
+		wayland_cursor,
+		wlroots,
+	],
+	link_with: [lib_sway_common, lib_sway_client],
+	install: true
+)
diff --git a/swaynag/render.c b/swaynag/render.c
new file mode 100644
index 00000000..766409e4
--- /dev/null
+++ b/swaynag/render.c
@@ -0,0 +1,308 @@
+#include <stdint.h>
+#include "cairo.h"
+#include "log.h"
+#include "pango.h"
+#include "pool-buffer.h"
+#include "swaynag/swaynag.h"
+#include "swaynag/types.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
+
+static uint32_t render_message(cairo_t *cairo, struct swaynag *swaynag) {
+	uint32_t height = swaynag->height * swaynag->scale;
+	height -= swaynag->type->bar_border_thickness * swaynag->scale;
+
+	int text_width, text_height;
+	get_text_size(cairo, swaynag->type->font, &text_width, &text_height,
+			swaynag->scale, true, "%s", swaynag->message);
+
+	int padding = swaynag->type->message_padding * swaynag->scale;
+
+	uint32_t ideal_height = text_height + padding * 2;
+	uint32_t ideal_surface_height = ideal_height / swaynag->scale;
+	if (swaynag->height < ideal_surface_height) {
+		return ideal_surface_height;
+	}
+
+	cairo_set_source_u32(cairo, swaynag->type->text);
+	cairo_move_to(cairo, padding, (int)(ideal_height - text_height) / 2);
+	pango_printf(cairo, swaynag->type->font, swaynag->scale, false,
+			"%s", swaynag->message);
+
+	return ideal_surface_height;
+}
+
+static void render_details_scroll_button(cairo_t *cairo,
+		struct swaynag *swaynag, struct swaynag_button *button) {
+	int text_width, text_height;
+	get_text_size(cairo, swaynag->type->font, &text_width, &text_height,
+			swaynag->scale, true, "%s", button->text);
+
+	int border = swaynag->type->button_border_thickness * swaynag->scale;
+	int padding = swaynag->type->button_padding * swaynag->scale;
+
+	cairo_set_source_u32(cairo, swaynag->type->border);
+	cairo_rectangle(cairo, button->x, button->y,
+			button->width, button->height);
+	cairo_fill(cairo);
+
+	cairo_set_source_u32(cairo, swaynag->type->button_background);
+	cairo_rectangle(cairo, button->x + border, button->y + border,
+			button->width - (border * 2), button->height - (border * 2));
+	cairo_fill(cairo);
+
+	cairo_set_source_u32(cairo, swaynag->type->text);
+	cairo_move_to(cairo, button->x + border + padding,
+			button->y + border + (button->height - text_height) / 2);
+	pango_printf(cairo, swaynag->type->font, swaynag->scale, true,
+			"%s", button->text);
+}
+
+static int get_detailed_scroll_button_width(cairo_t *cairo,
+		struct swaynag *swaynag) {
+	int up_width, down_width, temp_height;
+	get_text_size(cairo, swaynag->type->font, &up_width, &temp_height,
+			swaynag->scale, true,
+			"%s", swaynag->details.button_up.text);
+	get_text_size(cairo, swaynag->type->font, &down_width, &temp_height,
+			swaynag->scale, true,
+			"%s", swaynag->details.button_down.text);
+
+	int text_width =  up_width > down_width ? up_width : down_width;
+	int border = swaynag->type->button_border_thickness * swaynag->scale;
+	int padding = swaynag->type->button_padding * swaynag->scale;
+
+	return text_width + border * 2 + padding * 2;
+}
+
+static uint32_t render_detailed(cairo_t *cairo, struct swaynag *swaynag,
+		uint32_t y) {
+	uint32_t width = swaynag->width * swaynag->scale;
+	uint32_t height = swaynag->height * swaynag->scale;
+	height -= swaynag->type->bar_border_thickness * swaynag->scale;
+
+	int border = swaynag->type->details_border_thickness * swaynag->scale;
+	int padding = swaynag->type->message_padding * swaynag->scale;
+	int decor = padding + border;
+
+	swaynag->details.x = decor;
+	swaynag->details.y = y * swaynag->scale + decor;
+	swaynag->details.width = width - decor * 2;
+
+	PangoLayout *layout = get_pango_layout(cairo, swaynag->type->font,
+			swaynag->details.message, swaynag->scale, false);
+	pango_layout_set_width(layout,
+			(swaynag->details.width - padding * 2) * PANGO_SCALE);
+	pango_layout_set_wrap(layout, PANGO_WRAP_WORD_CHAR);
+	pango_layout_set_single_paragraph_mode(layout, false);
+	pango_cairo_update_layout(cairo, layout);
+	swaynag->details.total_lines = pango_layout_get_line_count(layout);
+
+	PangoLayoutLine *line;
+	line = pango_layout_get_line_readonly(layout, swaynag->details.offset);
+	gint offset = line->start_index;
+	const char *text = pango_layout_get_text(layout);
+	pango_layout_set_text(layout, text + offset, strlen(text) - offset);
+
+	int text_width, text_height;
+	pango_cairo_update_layout(cairo, layout);
+	pango_layout_get_pixel_size(layout, &text_width, &text_height);
+
+	bool show_buttons = swaynag->details.offset > 0;
+	int button_width = get_detailed_scroll_button_width(cairo, swaynag);
+	if (show_buttons) {
+		swaynag->details.width -= button_width;
+		pango_layout_set_width(layout,
+				(swaynag->details.width - padding * 2) * PANGO_SCALE);
+	}
+
+	uint32_t ideal_height;
+	do {
+		ideal_height = swaynag->details.y + text_height + decor + padding * 2;
+		if (ideal_height > SWAYNAG_MAX_HEIGHT) {
+			ideal_height = SWAYNAG_MAX_HEIGHT;
+
+			if (!show_buttons) {
+				show_buttons = true;
+				swaynag->details.width -= button_width;
+				pango_layout_set_width(layout,
+						(swaynag->details.width - padding * 2) * PANGO_SCALE);
+			}
+		}
+
+		swaynag->details.height = ideal_height - swaynag->details.y - decor;
+		pango_layout_set_height(layout,
+				(swaynag->details.height - padding * 2) * PANGO_SCALE);
+		pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
+		pango_cairo_update_layout(cairo, layout);
+		pango_layout_get_pixel_size(layout, &text_width, &text_height);
+	} while (text_height != (swaynag->details.height - padding * 2));
+
+	swaynag->details.visible_lines = pango_layout_get_line_count(layout);
+
+	if (show_buttons) {
+		swaynag->details.button_up.x =
+			swaynag->details.x + swaynag->details.width;
+		swaynag->details.button_up.y = swaynag->details.y;
+		swaynag->details.button_up.width = button_width;
+		swaynag->details.button_up.height = swaynag->details.height / 2;
+		render_details_scroll_button(cairo, swaynag,
+				&swaynag->details.button_up);
+
+		swaynag->details.button_down.x =
+			swaynag->details.x + swaynag->details.width;
+		swaynag->details.button_down.y =
+			swaynag->details.button_up.y + swaynag->details.button_up.height;
+		swaynag->details.button_down.width = button_width;
+		swaynag->details.button_down.height = swaynag->details.height / 2;
+		render_details_scroll_button(cairo, swaynag,
+				&swaynag->details.button_down);
+	}
+
+	cairo_set_source_u32(cairo, swaynag->type->border);
+	cairo_rectangle(cairo, swaynag->details.x, swaynag->details.y,
+			swaynag->details.width, swaynag->details.height);
+	cairo_fill(cairo);
+
+	cairo_move_to(cairo, swaynag->details.x + padding,
+			swaynag->details.y + padding);
+	cairo_set_source_u32(cairo, swaynag->type->text);
+	pango_cairo_show_layout(cairo, layout);
+	g_object_unref(layout);
+
+	return ideal_height / swaynag->scale;
+}
+
+static uint32_t render_button(cairo_t *cairo, struct swaynag *swaynag,
+		int button_index, int *x) {
+	uint32_t height = swaynag->height * swaynag->scale;
+	height -= swaynag->type->bar_border_thickness * swaynag->scale;
+	struct swaynag_button *button = swaynag->buttons->items[button_index];
+
+	int text_width, text_height;
+	get_text_size(cairo, swaynag->type->font, &text_width, &text_height,
+			swaynag->scale, true, "%s", button->text);
+
+	int border = swaynag->type->button_border_thickness * swaynag->scale;
+	int padding = swaynag->type->button_padding * swaynag->scale;
+
+	uint32_t ideal_height = text_height + padding * 2 + border * 2;
+	uint32_t ideal_surface_height = ideal_height / swaynag->scale;
+	if (swaynag->height < ideal_surface_height) {
+		return ideal_surface_height;
+	}
+
+	button->x = *x - border - text_width - padding * 2;
+	button->y = (int)(ideal_height - text_height) / 2 - padding;
+	button->width = text_width + padding * 2;
+	button->height = text_height + padding * 2;
+
+	cairo_set_source_u32(cairo, swaynag->type->border);
+	cairo_rectangle(cairo, button->x - border, button->y - border,
+			button->width + border * 2, button->height + border * 2);
+	cairo_fill(cairo);
+
+	cairo_set_source_u32(cairo, swaynag->type->button_background);
+	cairo_rectangle(cairo, button->x, button->y,
+			button->width, button->height);
+	cairo_fill(cairo);
+
+	cairo_set_source_u32(cairo, swaynag->type->text);
+	cairo_move_to(cairo, button->x + padding, button->y + padding);
+	pango_printf(cairo, swaynag->type->font, swaynag->scale, true,
+			"%s", button->text);
+
+	*x = button->x - border;
+
+	return ideal_surface_height;
+}
+
+static uint32_t render_to_cairo(cairo_t *cairo, struct swaynag *swaynag) {
+	uint32_t max_height = 0;
+
+	cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
+	cairo_set_source_u32(cairo, swaynag->type->background);
+	cairo_paint(cairo);
+
+	uint32_t h = render_message(cairo, swaynag);
+	max_height = h > max_height ? h : max_height;
+
+	int x = swaynag->width - swaynag->type->button_margin_right;
+	x *= swaynag->scale;
+	for (int i = 0; i < swaynag->buttons->length; i++) {
+		h = render_button(cairo, swaynag, i, &x);
+		max_height = h > max_height ? h : max_height;
+		x -= swaynag->type->button_gap * swaynag->scale;
+		if (i == 0) {
+			x -= swaynag->type->button_gap_close * swaynag->scale;
+		}
+	}
+
+	if (swaynag->details.visible) {
+		h = render_detailed(cairo, swaynag, max_height);
+		max_height = h > max_height ? h : max_height;
+	}
+
+	int border = swaynag->type->bar_border_thickness * swaynag->scale;
+	if (max_height > swaynag->height) {
+		max_height += border;
+	}
+	cairo_set_source_u32(cairo, swaynag->type->border_bottom);
+	cairo_rectangle(cairo, 0,
+			swaynag->height * swaynag->scale - border,
+			swaynag->width * swaynag->scale,
+			border);
+	cairo_fill(cairo);
+
+	return max_height;
+}
+
+void render_frame(struct swaynag *swaynag) {
+	if (!swaynag->run_display) {
+		return;
+	}
+
+	cairo_surface_t *recorder = cairo_recording_surface_create(
+			CAIRO_CONTENT_COLOR_ALPHA, NULL);
+	cairo_t *cairo = cairo_create(recorder);
+	cairo_save(cairo);
+	cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
+	cairo_paint(cairo);
+	cairo_restore(cairo);
+	uint32_t height = render_to_cairo(cairo, swaynag);
+	if (height != swaynag->height) {
+		zwlr_layer_surface_v1_set_size(swaynag->layer_surface, 0, height);
+		zwlr_layer_surface_v1_set_exclusive_zone(swaynag->layer_surface,
+				height);
+		wl_surface_commit(swaynag->surface);
+		wl_display_roundtrip(swaynag->display);
+	} else {
+		swaynag->current_buffer = get_next_buffer(swaynag->shm,
+				swaynag->buffers,
+				swaynag->width * swaynag->scale,
+				swaynag->height * swaynag->scale);
+		if (!swaynag->current_buffer) {
+			wlr_log(WLR_DEBUG, "Failed to get buffer. Skipping frame.");
+			goto cleanup;
+		}
+
+		cairo_t *shm = swaynag->current_buffer->cairo;
+		cairo_save(shm);
+		cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
+		cairo_paint(shm);
+		cairo_restore(shm);
+		cairo_set_source_surface(shm, recorder, 0.0, 0.0);
+		cairo_paint(shm);
+
+		wl_surface_set_buffer_scale(swaynag->surface, swaynag->scale);
+		wl_surface_attach(swaynag->surface,
+				swaynag->current_buffer->buffer, 0, 0);
+		wl_surface_damage(swaynag->surface, 0, 0,
+				swaynag->width, swaynag->height);
+		wl_surface_commit(swaynag->surface);
+		wl_display_roundtrip(swaynag->display);
+	}
+
+cleanup:
+	cairo_surface_destroy(recorder);
+	cairo_destroy(cairo);
+}
diff --git a/swaynag/swaynag.1.scd b/swaynag/swaynag.1.scd
new file mode 100644
index 00000000..1c395aee
--- /dev/null
+++ b/swaynag/swaynag.1.scd
@@ -0,0 +1,106 @@
+swaynag(1)
+
+# NAME
+
+swaynag - Show a warning or error message with buttons
+
+# SYNOPSIS
+
+_swaynag_ [options...]
+
+# OPTIONS
+
+*-b, --button* <text> <action>
+	Create a button with the text _text_ that executes _action_ when pressed.
+	Multiple buttons can be defined by providing the flag multiple times.
+
+*-c, --config* <path>
+	The config file to use. By default, the following paths are checked:
+	_$HOME/.swaynag/config_, _$XDG\_CONFIG\_HOME/swaynag/config_, and
+	_SYSCONFDIR/swaynag/config_. All flags aside from this one and _debug_ are
+	valid options in the configuration file using the format
+	_long-option=value_. All leading dashes should be omitted and the equals
+	sign is required. See swaynag(5) for more information.
+
+*-d, --debug*
+	Enable debugging.
+
+*-e, --edge* top|bottom
+	Set the edge to use.
+
+*-f, --font* <font>
+	Set the font to use.
+
+*-h, --help*
+	Show help message and quit.
+
+*-l, --detailed-message*
+	Read a detailed message from stdin. A button to toggle details will be
+	added. Details are shown in a scrollable multi-line text area.
+
+*-L, --detailed-button* <text>
+	Set the text for the button that toggles details. This has no effect if
+	there is not a detailed message. The default is _Toggle Details_.
+
+*-m, --message* <msg>
+	Set the message text.
+
+*-o, --output* <output>
+	Set the output to use. This should be the name of a _xdg\_output_.
+
+*-s, --dismiss-button* <text>
+	Sets the text for the dismiss nagbar button. The default is _X_.
+
+*-t, --type* <type>
+	Set the message type. Two types are created by default _error_ and
+	_warning_. Custom types can be defined in the config file. See
+	_--config_ and swaynag(5) for details. Both of the default types can be
+	overridden in the config file as well.
+
+*-v, --version*
+	Show the version number and quit.
+
+# APPEARANCE OPTIONS
+
+*--background* <RRGGBB[AA]>
+	Set the color of the background.
+
+*--border* <RRGGBB[AA]>
+	Set the color of the border.
+
+*--border-bottom* <RRGGBB[AA]>
+	Set the color of the bottom border.
+
+*--button-background* <RRGGBB[AA]>
+	Set the color for the background for buttons.
+
+*--text* <RRGGBB[AA]>
+	Set the text color.
+
+*--border-bottom-size* <size>
+	Set the thickness of the bottom border.
+
+*--message-padding* <padding>
+	Set the padding for the message.
+
+*--details-border-size* <size>
+	Set the thickness for the details border.
+
+*--button-border-size* <size>
+	Set the thickness for the button border.
+
+*--button-gap* <gap>
+	Set the size of the gap between buttons.
+
+*--button-dismiss-gap* <gap>
+	Set the size of the gap between the dismiss button and another button.
+
+*--button-margin-right* <margin>
+	Set the margin from the right of the dismiss button to edge.
+
+*--button-padding* <padding>
+	Set the padding for the button text.
+
+# SEE
+
+swaynag(5)
diff --git a/swaynag/swaynag.5.scd b/swaynag/swaynag.5.scd
new file mode 100644
index 00000000..d3daadf7
--- /dev/null
+++ b/swaynag/swaynag.5.scd
@@ -0,0 +1,100 @@
+swaynag(5)
+
+# NAME
+
+swaynag - swaynag configuration file
+
+# SYNOPSIS
+
+$HOME/.swaynag/config, $XDG\_CONFIG\_HOME/swaynag/config,
+SYSCONFDIR/swaynag/config
+
+# CONFIG FILE
+
+At the top of the config file, _swaynag_ options can be set using the format
+_long-option=value_. These will be used as default values if _swaynag_ is not
+given the option. This can be useful for setting a preferred font, output, and
+edge.
+
+Below the options, custom types may be defined. To define a type, use the
+following format:
+
+```
+[name-of-type]
+option=value
+```
+
+All colors may be given in the form _RRGGBB_ or _RRGGBBAA_. The following
+colors can be set:
+
+*background=<color>*
+	The background color for _swaynag_.
+
+*border=<color>*
+	The color to use for borders of buttons.
+
+*border-bottom=<color>*
+	The color of the border line at the bottom of _swaynag_.
+
+*button-background=<color>*
+	The background color for the buttons.
+
+*text=<color>*
+	The color of the text.
+
+The following sizing options can also be set:
+
+*border-bottom-size=<size>*
+	Set the thickness of the bottom border.
+
+*message-padding=<padding>*
+	Set the padding for the message.
+
+*details-border-size=<size>*
+	Set the thickness for the details border.
+
+*button-border-size=<size>*
+	Set the thickness for the button border.
+
+*button-gap=<gap>*
+	Set the size of the gap between buttons.
+
+*button-dismiss-gap=<gap>*
+	Set the size of the gap between the dismiss button and another button.
+
+*button-margin-right=<margin>*
+	Set the margin from the right of the dismiss button to edge.
+
+*button-padding=<padding>*
+	Set the padding for the button text.
+
+Additionally, the following options can be assigned a default per-type:
+
+*edge=top|bottom*
+	Set the edge to use.
+
+*font=<font>*
+	Set the font to use.
+
+*output=<output>*
+	Set the output to use. This should be the name of a _xdg\_output_.
+
+# EXAMPLE
+
+```
+font=Monospace 12
+edge=bottom
+
+[green]
+edge=top
+background=00AA00
+border=006600
+border-bottom=004400
+text=FFFFFF
+button-background=00CC00
+message-padding=10
+```
+
+# SEE
+
+swaynag(1)
diff --git a/swaynag/swaynag.c b/swaynag/swaynag.c
new file mode 100644
index 00000000..3966277d
--- /dev/null
+++ b/swaynag/swaynag.c
@@ -0,0 +1,451 @@
+#define _XOPEN_SOURCE 500
+#include <assert.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <wayland-client.h>
+#include <wayland-cursor.h>
+#include "log.h"
+#include "list.h"
+#include "swaynag/render.h"
+#include "swaynag/swaynag.h"
+#include "swaynag/types.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
+
+static void nop() {
+	// Intentionally left blank
+}
+
+static bool terminal_execute(char *terminal, char *command) {
+	char fname[] = "/tmp/swaynagXXXXXX";
+	FILE *tmp= fdopen(mkstemp(fname), "w");
+	if (!tmp) {
+		wlr_log(WLR_ERROR, "Failed to create temp script");
+		return false;
+	}
+	wlr_log(WLR_DEBUG, "Created temp script: %s", fname);
+	fprintf(tmp, "#!/bin/sh\nrm %s\n%s", fname, command);
+	fclose(tmp);
+	chmod(fname, S_IRUSR | S_IWUSR | S_IXUSR);
+	char cmd[strlen(terminal) + strlen(" -e ") + strlen(fname) + 1];
+	sprintf(cmd, "%s -e %s", terminal, fname);
+	execl("/bin/sh", "/bin/sh", "-c", cmd, NULL);
+	return true;
+}
+
+static void swaynag_button_execute(struct swaynag *swaynag,
+		struct swaynag_button *button) {
+	wlr_log(WLR_DEBUG, "Executing [%s]: %s", button->text, button->action);
+	if (button->type == SWAYNAG_ACTION_DISMISS) {
+		swaynag->run_display = false;
+	} else if (button->type == SWAYNAG_ACTION_EXPAND) {
+		swaynag->details.visible = !swaynag->details.visible;
+		render_frame(swaynag);
+	} else {
+		if (fork() == 0) {
+			// Child process. Will be used to prevent zombie processes
+			setsid();
+			if (fork() == 0) {
+				// Child of the child. Will be reparented to the init process
+				char *terminal = getenv("TERMINAL");
+				if (terminal && strlen(terminal)) {
+					wlr_log(WLR_DEBUG, "Found $TERMINAL: %s", terminal);
+					if (!terminal_execute(terminal, button->action)) {
+						swaynag_destroy(swaynag);
+						exit(EXIT_FAILURE);
+					}
+				} else {
+					wlr_log(WLR_DEBUG, "$TERMINAL not found. Running directly");
+					execl("/bin/sh", "/bin/sh", "-c", button->action, NULL);
+				}
+			}
+			exit(EXIT_SUCCESS);
+		}
+	}
+	wait(0);
+}
+
+static void layer_surface_configure(void *data,
+		struct zwlr_layer_surface_v1 *surface,
+		uint32_t serial, uint32_t width, uint32_t height) {
+	struct swaynag *swaynag = data;
+	swaynag->width = width;
+	swaynag->height = height;
+	zwlr_layer_surface_v1_ack_configure(surface, serial);
+	render_frame(swaynag);
+}
+
+static void layer_surface_closed(void *data,
+		struct zwlr_layer_surface_v1 *surface) {
+	struct swaynag *swaynag = data;
+	swaynag_destroy(swaynag);
+}
+
+static struct zwlr_layer_surface_v1_listener layer_surface_listener = {
+	.configure = layer_surface_configure,
+	.closed = layer_surface_closed,
+};
+
+static void surface_enter(void *data, struct wl_surface *surface,
+		struct wl_output *output) {
+	struct swaynag *swaynag = data;
+	struct swaynag_output *swaynag_output;
+	wl_list_for_each(swaynag_output, &swaynag->outputs, link) {
+		if (swaynag_output->wl_output == output) {
+			wlr_log(WLR_DEBUG, "Surface enter on output %s",
+					swaynag_output->name);
+			swaynag->output = swaynag_output;
+			swaynag->scale = swaynag->output->scale;
+			render_frame(swaynag);
+			break;
+		}
+	};
+}
+
+static struct wl_surface_listener surface_listener = {
+	.enter = surface_enter,
+	.leave = nop,
+};
+
+static void update_cursor(struct swaynag *swaynag) {
+	struct swaynag_pointer *pointer = &swaynag->pointer;
+	pointer->cursor_theme = wl_cursor_theme_load(NULL, 24 * swaynag->scale,
+			swaynag->shm);
+	struct wl_cursor *cursor =
+		wl_cursor_theme_get_cursor(pointer->cursor_theme, "left_ptr");
+	pointer->cursor_image = cursor->images[0];
+	wl_surface_set_buffer_scale(pointer->cursor_surface,
+			swaynag->scale);
+	wl_surface_attach(pointer->cursor_surface,
+			wl_cursor_image_get_buffer(pointer->cursor_image), 0, 0);
+	wl_pointer_set_cursor(pointer->pointer, pointer->serial,
+			pointer->cursor_surface,
+			pointer->cursor_image->hotspot_x / swaynag->scale,
+			pointer->cursor_image->hotspot_y / swaynag->scale);
+	wl_surface_commit(pointer->cursor_surface);
+}
+
+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 swaynag *swaynag = data;
+	struct swaynag_pointer *pointer = &swaynag->pointer;
+	pointer->serial = serial;
+	update_cursor(swaynag);
+}
+
+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) {
+	struct swaynag *swaynag = data;
+	swaynag->pointer.x = wl_fixed_to_int(surface_x);
+	swaynag->pointer.y = wl_fixed_to_int(surface_y);
+}
+
+static void wl_pointer_button(void *data, struct wl_pointer *wl_pointer,
+		uint32_t serial, uint32_t time, uint32_t button, uint32_t state) {
+	struct swaynag *swaynag = data;
+
+	if (state != WL_POINTER_BUTTON_STATE_PRESSED) {
+		return;
+	}
+
+	double x = swaynag->pointer.x * swaynag->scale;
+	double y = swaynag->pointer.y * swaynag->scale;
+	for (int i = 0; i < swaynag->buttons->length; i++) {
+		struct swaynag_button *nagbutton = swaynag->buttons->items[i];
+		if (x >= nagbutton->x
+				&& y >= nagbutton->y
+				&& x < nagbutton->x + nagbutton->width
+				&& y < nagbutton->y + nagbutton->height) {
+			swaynag_button_execute(swaynag, nagbutton);
+			return;
+		}
+	}
+
+	if (swaynag->details.visible &&
+			swaynag->details.total_lines != swaynag->details.visible_lines) {
+		struct swaynag_button button_up = swaynag->details.button_up;
+		if (x >= button_up.x
+				&& y >= button_up.y
+				&& x < button_up.x + button_up.width
+				&& y < button_up.y + button_up.height
+				&& swaynag->details.offset > 0) {
+			swaynag->details.offset--;
+			render_frame(swaynag);
+			return;
+		}
+
+		struct swaynag_button button_down = swaynag->details.button_down;
+		int bot = swaynag->details.total_lines;
+		bot -= swaynag->details.visible_lines;
+		if (x >= button_down.x
+				&& y >= button_down.y
+				&& x < button_down.x + button_down.width
+				&& y < button_down.y + button_down.height
+				&& swaynag->details.offset < bot) {
+			swaynag->details.offset++;
+			render_frame(swaynag);
+			return;
+		}
+	}
+}
+
+static void wl_pointer_axis(void *data, struct wl_pointer *wl_pointer,
+		uint32_t time, uint32_t axis, wl_fixed_t value) {
+	struct swaynag *swaynag = data;
+	if (!swaynag->details.visible
+			|| swaynag->pointer.x < swaynag->details.x
+			|| swaynag->pointer.y < swaynag->details.y
+			|| swaynag->pointer.x >= swaynag->details.x + swaynag->details.width
+			|| swaynag->pointer.y >= swaynag->details.y + swaynag->details.height
+			|| swaynag->details.total_lines == swaynag->details.visible_lines) {
+		return;
+	}
+
+	int direction = wl_fixed_to_int(value);
+	int bot = swaynag->details.total_lines - swaynag->details.visible_lines;
+	if (direction < 0 && swaynag->details.offset > 0) {
+		swaynag->details.offset--;
+	} else if (direction > 0 && swaynag->details.offset < bot) {
+		swaynag->details.offset++;
+	}
+
+	render_frame(swaynag);
+}
+
+static struct wl_pointer_listener pointer_listener = {
+	.enter = wl_pointer_enter,
+	.leave = nop,
+	.motion = wl_pointer_motion,
+	.button = wl_pointer_button,
+	.axis = wl_pointer_axis,
+	.frame = nop,
+	.axis_source = nop,
+	.axis_stop = nop,
+	.axis_discrete = nop,
+};
+
+static void seat_handle_capabilities(void *data, struct wl_seat *wl_seat,
+		enum wl_seat_capability caps) {
+	struct swaynag *swaynag = data;
+	if ((caps & WL_SEAT_CAPABILITY_POINTER)) {
+		swaynag->pointer.pointer = wl_seat_get_pointer(wl_seat);
+		wl_pointer_add_listener(swaynag->pointer.pointer, &pointer_listener,
+				swaynag);
+	}
+}
+
+const struct wl_seat_listener seat_listener = {
+	.capabilities = seat_handle_capabilities,
+	.name = nop,
+};
+
+static void output_scale(void *data, struct wl_output *output,
+		int32_t factor) {
+	struct swaynag_output *swaynag_output = data;
+	swaynag_output->scale = factor;
+	if (swaynag_output->swaynag->output == swaynag_output) {
+		swaynag_output->swaynag->scale = swaynag_output->scale;
+		update_cursor(swaynag_output->swaynag);
+		render_frame(swaynag_output->swaynag);
+	}
+}
+
+static struct wl_output_listener output_listener = {
+	.geometry = nop,
+	.mode = nop,
+	.done = nop,
+	.scale = output_scale,
+};
+
+static void xdg_output_handle_name(void *data,
+		struct zxdg_output_v1 *xdg_output, const char *name) {
+	struct swaynag_output *swaynag_output = data;
+	char *outname = swaynag_output->swaynag->type->output;
+	wlr_log(WLR_DEBUG, "Checking against output %s for %s", name, outname);
+	if (!swaynag_output->swaynag->output && outname && name
+			&& strcmp(outname, name) == 0) {
+		wlr_log(WLR_DEBUG, "Using output %s", name);
+		swaynag_output->swaynag->output = swaynag_output;
+	}
+	swaynag_output->name = strdup(name);
+	zxdg_output_v1_destroy(xdg_output);
+	swaynag_output->swaynag->querying_outputs--;
+}
+
+static struct zxdg_output_v1_listener xdg_output_listener = {
+	.logical_position = nop,
+	.logical_size = nop,
+	.done = nop,
+	.name = xdg_output_handle_name,
+	.description = nop,
+};
+
+static void handle_global(void *data, struct wl_registry *registry,
+		uint32_t name, const char *interface, uint32_t version) {
+	struct swaynag *swaynag = data;
+	if (strcmp(interface, wl_compositor_interface.name) == 0) {
+		swaynag->compositor = wl_registry_bind(registry, name,
+				&wl_compositor_interface, 3);
+	} else if (strcmp(interface, wl_seat_interface.name) == 0) {
+		swaynag->seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
+		wl_seat_add_listener(swaynag->seat, &seat_listener, swaynag);
+	} else if (strcmp(interface, wl_shm_interface.name) == 0) {
+		swaynag->shm = wl_registry_bind(registry, name, &wl_shm_interface, 1);
+	} else if (strcmp(interface, wl_output_interface.name) == 0) {
+		if (!swaynag->output && swaynag->xdg_output_manager) {
+			swaynag->querying_outputs++;
+			struct swaynag_output *output =
+				calloc(1, sizeof(struct swaynag_output));
+			output->wl_output = wl_registry_bind(registry, name,
+					&wl_output_interface, 3);
+			output->wl_name = name;
+			output->scale = 1;
+			output->swaynag = swaynag;
+			wl_list_insert(&swaynag->outputs, &output->link);
+			wl_output_add_listener(output->wl_output,
+					&output_listener, output);
+
+			struct zxdg_output_v1 *xdg_output;
+			xdg_output = zxdg_output_manager_v1_get_xdg_output(
+					swaynag->xdg_output_manager, output->wl_output);
+			zxdg_output_v1_add_listener(xdg_output,
+					&xdg_output_listener, output);
+		}
+	} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
+		swaynag->layer_shell = wl_registry_bind(
+				registry, name, &zwlr_layer_shell_v1_interface, 1);
+	} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0
+			&& version >= ZXDG_OUTPUT_V1_NAME_SINCE_VERSION) {
+		swaynag->xdg_output_manager = wl_registry_bind(registry, name,
+				&zxdg_output_manager_v1_interface,
+				ZXDG_OUTPUT_V1_NAME_SINCE_VERSION);
+	}
+}
+
+static void handle_global_remove(void *data, struct wl_registry *registry,
+		uint32_t name) {
+	struct swaynag *swaynag = data;
+	if (swaynag->output->wl_name == name) {
+		swaynag->run_display = false;
+	}
+}
+
+static const struct wl_registry_listener registry_listener = {
+	.global = handle_global,
+	.global_remove = handle_global_remove,
+};
+
+void swaynag_setup(struct swaynag *swaynag) {
+	swaynag->display = wl_display_connect(NULL);
+	assert(swaynag->display);
+
+	swaynag->scale = 1;
+	wl_list_init(&swaynag->outputs);
+
+	struct wl_registry *registry = wl_display_get_registry(swaynag->display);
+	wl_registry_add_listener(registry, &registry_listener, swaynag);
+	wl_display_roundtrip(swaynag->display);
+	assert(swaynag->compositor && swaynag->layer_shell && swaynag->shm);
+
+	while (swaynag->querying_outputs > 0) {
+		wl_display_roundtrip(swaynag->display);
+	}
+
+	if (!swaynag->output && swaynag->type->output) {
+		wlr_log(WLR_ERROR, "Output '%s' not found", swaynag->type->output);
+		swaynag_destroy(swaynag);
+		exit(EXIT_FAILURE);
+	}
+
+	struct swaynag_pointer *pointer = &swaynag->pointer;
+	pointer->cursor_surface = wl_compositor_create_surface(swaynag->compositor);
+	assert(pointer->cursor_surface);
+
+	swaynag->surface = wl_compositor_create_surface(swaynag->compositor);
+	assert(swaynag->surface);
+	wl_surface_add_listener(swaynag->surface, &surface_listener, swaynag);
+
+	swaynag->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
+			swaynag->layer_shell, swaynag->surface,
+			swaynag->output ? swaynag->output->wl_output : NULL,
+			ZWLR_LAYER_SHELL_V1_LAYER_TOP, "swaynag");
+	assert(swaynag->layer_surface);
+	zwlr_layer_surface_v1_add_listener(swaynag->layer_surface,
+			&layer_surface_listener, swaynag);
+	zwlr_layer_surface_v1_set_anchor(swaynag->layer_surface,
+			swaynag->type->anchors);
+
+	wl_registry_destroy(registry);
+}
+
+void swaynag_run(struct swaynag *swaynag) {
+	swaynag->run_display = true;
+	render_frame(swaynag);
+	while (swaynag->run_display
+			&& wl_display_dispatch(swaynag->display) != -1) {
+		// This is intentionally left blank
+	}
+}
+
+void swaynag_destroy(struct swaynag *swaynag) {
+	swaynag->run_display = false;
+
+	free(swaynag->message);
+	while (swaynag->buttons->length) {
+		struct swaynag_button *button = swaynag->buttons->items[0];
+		list_del(swaynag->buttons, 0);
+		free(button->text);
+		free(button->action);
+		free(button);
+	}
+	list_free(swaynag->buttons);
+	free(swaynag->details.message);
+	free(swaynag->details.button_up.text);
+	free(swaynag->details.button_down.text);
+
+	if (swaynag->type) {
+		swaynag_type_free(swaynag->type);
+	}
+
+	if (swaynag->layer_surface) {
+		zwlr_layer_surface_v1_destroy(swaynag->layer_surface);
+	}
+
+	if (swaynag->surface) {
+		wl_surface_destroy(swaynag->surface);
+	}
+
+	if (swaynag->pointer.cursor_theme) {
+		wl_cursor_theme_destroy(swaynag->pointer.cursor_theme);
+	}
+
+	if (&swaynag->buffers[0]) {
+		destroy_buffer(&swaynag->buffers[0]);
+	}
+
+	if (&swaynag->buffers[1]) {
+		destroy_buffer(&swaynag->buffers[1]);
+	}
+
+	if (swaynag->outputs.prev || swaynag->outputs.next) {
+		struct swaynag_output *output, *temp;
+		wl_list_for_each_safe(output, temp, &swaynag->outputs, link) {
+			wl_output_destroy(output->wl_output);
+			free(output->name);
+			wl_list_remove(&output->link);
+			free(output);
+		};
+	}
+
+	if (swaynag->compositor) {
+		wl_compositor_destroy(swaynag->compositor);
+	}
+
+	if (swaynag->shm) {
+		wl_shm_destroy(swaynag->shm);
+	}
+
+	if (swaynag->display) {
+		wl_display_disconnect(swaynag->display);
+	}
+}
diff --git a/swaynag/types.c b/swaynag/types.c
new file mode 100644
index 00000000..1e0a138b
--- /dev/null
+++ b/swaynag/types.c
@@ -0,0 +1,156 @@
+#define _XOPEN_SOURCE 500
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <strings.h>
+#include "list.h"
+#include "swaynag/config.h"
+#include "swaynag/types.h"
+#include "util.h"
+#include "wlr-layer-shell-unstable-v1-client-protocol.h"
+
+void swaynag_types_add_default(list_t *types) {
+	struct swaynag_type *type_defaults;
+	type_defaults = calloc(1, sizeof(struct swaynag_type));
+	type_defaults->name = strdup("<defaults>");
+	type_defaults->font = strdup("pango:Monospace 10");
+	type_defaults->anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
+		| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+		| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
+	type_defaults->button_background = 0x333333FF;
+	type_defaults->background = 0x323232FF;
+	type_defaults->text = 0xFFFFFFFF;
+	type_defaults->border = 0x222222FF;
+	type_defaults->border_bottom = 0x444444FF;
+	type_defaults->bar_border_thickness = 2;
+	type_defaults->message_padding = 8;
+	type_defaults->details_border_thickness = 3;
+	type_defaults->button_border_thickness = 3;
+	type_defaults->button_gap = 20;
+	type_defaults->button_gap_close = 15;
+	type_defaults->button_margin_right = 2;
+	type_defaults->button_padding = 3;
+	list_add(types, type_defaults);
+
+	struct swaynag_type *type_error;
+	type_error = calloc(1, sizeof(struct swaynag_type));
+	type_error->button_background = 0x680A0AFF;
+	type_error->background = 0x900000FF;
+	type_error->text = 0xFFFFFFFF;
+	type_error->border = 0xD92424FF;
+	type_error->border_bottom = 0x470909FF;
+	type_error->name = strdup("error");
+	list_add(types, type_error);
+
+	struct swaynag_type *type_warning;
+	type_warning = calloc(1, sizeof(struct swaynag_type));
+	type_warning->name = strdup("warning");
+	type_warning->button_background = 0xFFC100FF;
+	type_warning->background = 0xFFA800FF;
+	type_warning->text = 0x000000FF;
+	type_warning->border = 0xAB7100FF;
+	type_warning->border_bottom = 0xAB7100FF;
+	list_add(types, type_warning);
+}
+
+struct swaynag_type *swaynag_type_get(list_t *types, char *name) {
+	for (int i = 0; i < types->length; i++) {
+		struct swaynag_type *type = types->items[i];
+		if (strcasecmp(type->name, name) == 0) {
+			return type;
+		}
+	}
+	return NULL;
+}
+
+void swaynag_type_merge(struct swaynag_type *dest, struct swaynag_type *src) {
+	if (!dest || !src) {
+		return;
+	}
+
+	if (!dest->font && src->font) {
+		dest->font = strdup(src->font);
+	}
+
+	if (!dest->output && src->output) {
+		dest->output = strdup(src->output);
+	}
+
+	if (dest->anchors == 0 && src->anchors > 0) {
+		dest->anchors = src->anchors;
+	}
+
+	// Colors
+	if (dest->button_background == 0 && src->button_background > 0) {
+		dest->button_background = src->button_background;
+	}
+
+	if (dest->background == 0 && src->background > 0) {
+		dest->background = src->background;
+	}
+
+	if (dest->text == 0 && src->text > 0) {
+		dest->text = src->text;
+	}
+
+	if (dest->border == 0 && src->border > 0) {
+		dest->border = src->border;
+	}
+
+	if (dest->border_bottom == 0 && src->border_bottom > 0) {
+		dest->border_bottom = src->border_bottom;
+	}
+
+	// Sizing
+	if (dest->bar_border_thickness == 0 && src->bar_border_thickness > 0) {
+		dest->bar_border_thickness = src->bar_border_thickness;
+	}
+
+	if (dest->message_padding == 0 && src->message_padding > 0) {
+		dest->message_padding = src->message_padding;
+	}
+
+	if (dest->details_border_thickness == 0
+			&& src->details_border_thickness > 0) {
+		dest->details_border_thickness = src->details_border_thickness;
+	}
+
+	if (dest->button_border_thickness == 0
+			&& src->button_border_thickness > 0) {
+		dest->button_border_thickness = src->button_border_thickness;
+	}
+
+	if (dest->button_gap == 0 && src->button_gap > 0) {
+		dest->button_gap = src->button_gap;
+	}
+
+	if (dest->button_gap_close == 0 && src->button_gap_close > 0) {
+		dest->button_gap_close = src->button_gap_close;
+	}
+
+	if (dest->button_margin_right == 0 && src->button_margin_right > 0) {
+		dest->button_margin_right = src->button_margin_right;
+	}
+
+	if (dest->button_padding == 0 && src->button_padding > 0) {
+		dest->button_padding = src->button_padding;
+	}
+}
+
+void swaynag_type_free(struct swaynag_type *type) {
+	free(type->name);
+	free(type->font);
+	free(type->output);
+	free(type);
+}
+
+void swaynag_types_free(list_t *types) {
+	while (types->length) {
+		struct swaynag_type *type = types->items[0];
+		swaynag_type_free(type);
+		list_del(types, 0);
+	}
+	list_free(types);
+}