swaynag: implement config file support

10 files changed, 500 insertions, 138 deletions

diff --git a/include/swaynag/nagbar.h b/include/swaynag/nagbar.h
index 8b55e4fa..b5d9b2cb 100644
--- a/include/swaynag/nagbar.h
+++ b/include/swaynag/nagbar.h
@@ -1,8 +1,9 @@
 #ifndef _SWAY_NAGBAR_NAGBAR_H
-#define _SWAY_NAGBAR_NAGNAR_H
+#define _SWAY_NAGBAR_NAGBAR_H
 #include <stdint.h>
 #include "list.h"
 #include "pool-buffer.h"
+#include "swaynag/types.h"
 #include "xdg-output-unstable-v1-client-protocol.h"
 
 #define NAGBAR_BAR_BORDER_THICKNESS 2
@@ -16,25 +17,12 @@
 
 #define NAGBAR_MAX_HEIGHT 500
 
-enum sway_nagbar_type {
-	NAGBAR_ERROR,
-	NAGBAR_WARNING,
-};
-
 enum sway_nagbar_action_type {
 	NAGBAR_ACTION_DISMISS,
 	NAGBAR_ACTION_EXPAND,
 	NAGBAR_ACTION_COMMAND,
 };
 
-struct sway_nagbar_colors {
-	uint32_t button_background;
-	uint32_t background;
-	uint32_t text;
-	uint32_t border;
-	uint32_t border_bottom;
-};
-
 struct sway_nagbar_pointer {
 	struct wl_pointer *pointer;
 	struct wl_cursor_theme *cursor_theme;
@@ -72,6 +60,7 @@ struct sway_nagbar_details {
 	int offset;
 	int visible_lines;
 	int total_lines;
+	struct sway_nagbar_button button_details;
 	struct sway_nagbar_button button_up;
 	struct sway_nagbar_button button_down;
 };
@@ -97,8 +86,7 @@ struct sway_nagbar {
 	struct pool_buffer buffers[2];
 	struct pool_buffer *current_buffer;
 
-	enum sway_nagbar_type type;
-	struct sway_nagbar_colors colors;
+	struct sway_nagbar_type *type;
 	uint32_t anchors;
 	char *message;
 	char *font;
diff --git a/include/swaynag/types.h b/include/swaynag/types.h
new file mode 100644
index 00000000..32056514
--- /dev/null
+++ b/include/swaynag/types.h
@@ -0,0 +1,25 @@
+#ifndef _SWAY_NAGBAR_TYPES_H
+#define _SWAY_NAGBAR_TYPES_H
+
+struct sway_nagbar_type {
+	char *name;
+	uint32_t button_background;
+	uint32_t background;
+	uint32_t text;
+	uint32_t border;
+	uint32_t border_bottom;
+};
+
+void nagbar_types_add_default(list_t *types);
+
+struct sway_nagbar_type *nagbar_type_get(list_t *types, char *name);
+
+struct sway_nagbar_type *nagbar_type_clone(struct sway_nagbar_type *type);
+
+void nagbar_type_free(struct sway_nagbar_type *type);
+
+void nagbar_types_free(list_t *types);
+
+int nagbar_parse_type(int argc, char **argv, struct sway_nagbar_type *type);
+
+#endif
diff --git a/meson.build b/meson.build
index c6501c39..57ed70cb 100644
--- a/meson.build
+++ b/meson.build
@@ -83,6 +83,7 @@ if scdoc.found()
 		'swaymsg/swaymsg.1.scd',
 		'swayidle/swayidle.1.scd',
 		'swaynag/swaynag.1.scd',
+		'swaynag/swaynag.5.scd',
 	]
 	foreach filename : man_files
 		topic = filename.split('.')[-3].split('/')[-1]
diff --git a/swaynag/main.c b/swaynag/main.c
index 60560c72..b199fac4 100644
--- a/swaynag/main.c
+++ b/swaynag/main.c
@@ -1,10 +1,14 @@
-#define _XOPEN_SOURCE 500
+#define _XOPEN_SOURCE 700
+#define _POSIX_C_SOURCE 200112L
 #include <getopt.h>
 #include <signal.h>
+#include <stdlib.h>
+#include <wordexp.h>
 #include "log.h"
 #include "list.h"
 #include "readline.h"
 #include "swaynag/nagbar.h"
+#include "swaynag/types.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
 static struct sway_nagbar nagbar;
@@ -19,22 +23,6 @@ void sway_terminate(int code) {
 	exit(code);
 }
 
-static void set_nagbar_colors() {
-	if (nagbar.type == NAGBAR_ERROR) {
-		nagbar.colors.button_background = 0x680A0AFF;
-		nagbar.colors.background = 0x900000FF;
-		nagbar.colors.text = 0xFFFFFFFF;
-		nagbar.colors.border = 0xD92424FF;
-		nagbar.colors.border_bottom = 0x470909FF;
-	} else if (nagbar.type == NAGBAR_WARNING) {
-		nagbar.colors.button_background = 0xFFC100FF;
-		nagbar.colors.background = 0xFFA800FF;
-		nagbar.colors.text = 0x000000FF;
-		nagbar.colors.border = 0xAB7100FF;
-		nagbar.colors.border_bottom = 0xAB7100FF;
-	}
-}
-
 static char *read_from_stdin() {
 	char *buffer = NULL;
 	while (!feof(stdin)) {
@@ -61,32 +49,11 @@ static char *read_from_stdin() {
 	return buffer;
 }
 
-int main(int argc, char **argv) {
-	int exit_code = EXIT_SUCCESS;
-	bool debug = false;
-
-	memset(&nagbar, 0, sizeof(nagbar));
-	nagbar.anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
-		| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
-		| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
-	nagbar.type = NAGBAR_ERROR;
-	set_nagbar_colors();
-	nagbar.font = strdup("pango:monospace 10");
-	nagbar.buttons = create_list();
-
-	struct sway_nagbar_button *button_close =
-		calloc(sizeof(struct sway_nagbar_button), 1);
-	button_close->text = strdup("X");
-	button_close->type = NAGBAR_ACTION_DISMISS;
-	list_add(nagbar.buttons, button_close);
-
-	struct sway_nagbar_button *button_details =
-		calloc(sizeof(struct sway_nagbar_button), 1);
-	button_details->text = strdup("Toggle Details");
-	button_details->type = NAGBAR_ACTION_EXPAND;
-
+static int parse_options(int argc, char **argv, struct sway_nagbar *nagbar,
+		list_t *types, char **config, bool *debug) {
 	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'},
@@ -106,6 +73,7 @@ int main(int argc, char **argv) {
 		"\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"
@@ -115,114 +83,301 @@ int main(int argc, char **argv) {
 		"  -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 error|warning      Set the message type.\n"
+		"  -t, --type <type>             Set the message type.\n"
 		"  -v, --version                 Show the version number and quit.\n";
 
+	optind = 1;
 	while (1) {
-		int c = getopt_long(argc, argv, "b:de:f:hlL:m:o:s:t:v", opts, NULL);
+		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 (optind >= argc) {
-				fprintf(stderr, "Missing action for button %s\n", optarg);
-				exit_code = EXIT_FAILURE;
-				goto cleanup;
-			}
-			struct sway_nagbar_button *button;
-			button = calloc(sizeof(struct sway_nagbar_button), 1);
-			button->text = strdup(optarg);
-			button->type = NAGBAR_ACTION_COMMAND;
-			button->action = strdup(argv[optind]);
-			optind++;
-			list_add(nagbar.buttons, button);
+			if (nagbar) {
+				if (optind >= argc) {
+					fprintf(stderr, "Missing action for button %s\n", optarg);
+					return EXIT_FAILURE;
+				}
+				struct sway_nagbar_button *button;
+				button = calloc(sizeof(struct sway_nagbar_button), 1);
+				button->text = strdup(optarg);
+				button->type = NAGBAR_ACTION_COMMAND;
+				button->action = strdup(argv[optind]);
+				optind++;
+				list_add(nagbar->buttons, button);
+			}
+			break;
+		case 'c': // Config
+			if (config) {
+				*config = strdup(optarg);
+			}
 			break;
 		case 'd': // Debug
-			debug = true;
+			if (debug) {
+				*debug = true;
+			}
 			break;
 		case 'e': // Edge
-			if (strcmp(optarg, "top") == 0) {
-				nagbar.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) {
-				nagbar.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);
-				exit_code = EXIT_FAILURE;
-				goto cleanup;
+			if (nagbar) {
+				if (strcmp(optarg, "top") == 0) {
+					nagbar->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) {
+					nagbar->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
-			free(nagbar.font);
-			nagbar.font = strdup(optarg);
+			if (nagbar) {
+				free(nagbar->font);
+				nagbar->font = strdup(optarg);
+			}
 			break;
 		case 'l': // Detailed Message
-			free(nagbar.details.message);
-			nagbar.details.message = read_from_stdin();
-			nagbar.details.button_up.text = strdup("▲");
-			nagbar.details.button_down.text = strdup("▼");
+			if (nagbar) {
+				free(nagbar->details.message);
+				nagbar->details.message = read_from_stdin();
+				nagbar->details.button_up.text = strdup("▲");
+				nagbar->details.button_down.text = strdup("▼");
+			}
 			break;
 		case 'L': // Detailed Button Text
-			free(button_details->text);
-			button_details->text = strdup(optarg);
+			if (nagbar) {
+				free(nagbar->details.button_details.text);
+				nagbar->details.button_details.text = strdup(optarg);
+			}
 			break;
 		case 'm': // Message
-			free(nagbar.message);
-			nagbar.message = strdup(optarg);
+			if (nagbar) {
+				free(nagbar->message);
+				nagbar->message = strdup(optarg);
+			}
 			break;
 		case 'o': // Output
-			free(nagbar.output.name);
-			nagbar.output.name = strdup(optarg);
+			if (nagbar) {
+				free(nagbar->output.name);
+				nagbar->output.name = strdup(optarg);
+			}
 			break;
 		case 's': // Dismiss Button Text
-			free(button_close->text);
-			button_close->text = strdup(optarg);
+			if (nagbar) {
+				struct sway_nagbar_button *button_close;
+				button_close = nagbar->buttons->items[0];
+				free(button_close->text);
+				button_close->text = strdup(optarg);
+			}
 			break;
 		case 't': // Type
-			if (strcmp(optarg, "error") == 0) {
-				nagbar.type = NAGBAR_ERROR;
-			} else if (strcmp(optarg, "warning") == 0) {
-				nagbar.type = NAGBAR_WARNING;
-			} else {
-				fprintf(stderr, "Type must be either 'error' or 'warning'\n");
-				exit_code = EXIT_FAILURE;
-				goto cleanup;
+			if (nagbar) {
+				nagbar->type = nagbar_type_get(types, optarg);
+				if (!nagbar->type) {
+					fprintf(stderr, "Unknown type %s\n", optarg);
+					return EXIT_FAILURE;
+				}
 			}
-			set_nagbar_colors();
 			break;
 		case 'v': // Version
 			fprintf(stdout, "swaynag version " SWAY_VERSION "\n");
-			exit_code = EXIT_SUCCESS;
-			goto cleanup;
+			return -1;
 		default: // Help or unknown flag
 			fprintf(c == 'h' ? stdout : stderr, "%s", usage);
-			exit_code = c == 'h' ? EXIT_SUCCESS : EXIT_FAILURE;
-			goto cleanup;
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static bool file_exists(const char *path) {
+	return path && access(path, R_OK) != -1;
+}
+
+static char *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;
+}
+
+static int load_config(char *path, struct sway_nagbar *nagbar, list_t *types) {
+	FILE *config = fopen(path, "r");
+	if (!config) {
+		fprintf(stderr, "Failed to read config. Running without it.\n");
+		return 0;
+	}
+	struct sway_nagbar_type *type = NULL;
+	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 = nagbar_type_get(types, name);
+			if (!type) {
+				type = calloc(1, sizeof(struct sway_nagbar_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;
+			if (type) {
+				result = nagbar_parse_type(2, argv, type);
+			} else {
+				result = parse_options(2, argv, nagbar, types, NULL, NULL);
+			}
+			if (result != 0) {
+				free(line);
+				fclose(config);
+				return result;
+			}
+		}
+
+		free(line);
 	}
+	fclose(config);
+	return 0;
+}
+
+int main(int argc, char **argv) {
+	int exit_code = EXIT_SUCCESS;
+
+	list_t *types = create_list();
+	nagbar_types_add_default(types);
+
+	memset(&nagbar, 0, sizeof(nagbar));
+	nagbar.anchors = ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP
+		| ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT
+		| ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
+	nagbar.font = strdup("pango:monospace 10");
+	nagbar.buttons = create_list();
+
+	struct sway_nagbar_button *button_close =
+		calloc(sizeof(struct sway_nagbar_button), 1);
+	button_close->text = strdup("X");
+	button_close->type = NAGBAR_ACTION_DISMISS;
+	list_add(nagbar.buttons, button_close);
+
+	nagbar.details.button_details.text = strdup("Toggle Details");
+	nagbar.details.button_details.type = NAGBAR_ACTION_EXPAND;
 
+
+	char *config_path = NULL;
+	bool debug = false;
+	int launch_status = parse_options(argc, argv, 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 = get_config_path();
+	}
+	if (config_path) {
+		wlr_log(WLR_DEBUG, "Loading config file: %s", config_path);
+		int config_status = load_config(config_path, &nagbar, types);
+		free(config_path);
+		if (config_status != 0) {
+			exit_code = config_status;
+			goto cleanup;
+		}
+	}
+
+	if (argc > 1) {
+		int result = parse_options(argc, argv, &nagbar, types, NULL, NULL);
+		if (result != 0) {
+			exit_code = result;
+			goto cleanup;
+		}
+	}
+
 	if (!nagbar.message) {
 		wlr_log(WLR_ERROR, "No message passed. Please provide --message/-m");
 		exit_code = EXIT_FAILURE;
 		goto cleanup;
 	}
 
+	if (!nagbar.type) {
+		nagbar.type = nagbar_type_get(types, "error");
+	}
+
+	nagbar.type = nagbar_type_clone(nagbar.type);
+	nagbar_types_free(types);
+
 	if (nagbar.details.message) {
-		list_add(nagbar.buttons, button_details);
+		list_add(nagbar.buttons, &nagbar.details.button_details);
 	} else {
-		free(button_details->text);
-		free(button_details);
+		free(nagbar.details.button_details.text);
 	}
 
 	wlr_log(WLR_DEBUG, "Output: %s", nagbar.output.name);
 	wlr_log(WLR_DEBUG, "Anchors: %d", nagbar.anchors);
-	wlr_log(WLR_DEBUG, "Type: %d", nagbar.type);
+	wlr_log(WLR_DEBUG, "Type: %s", nagbar.type->name);
 	wlr_log(WLR_DEBUG, "Message: %s", nagbar.message);
 	wlr_log(WLR_DEBUG, "Font: %s", nagbar.font);
 	wlr_log(WLR_DEBUG, "Buttons");
@@ -238,8 +393,8 @@ int main(int argc, char **argv) {
 	return exit_code;
 
 cleanup:
-	free(button_details->text);
-	free(button_details);
+	nagbar_types_free(types);
+	free(nagbar.details.button_details.text);
 	nagbar_destroy(&nagbar);
 	return exit_code;
 }
diff --git a/swaynag/meson.build b/swaynag/meson.build
index 6492e4dc..6a9df984 100644
--- a/swaynag/meson.build
+++ b/swaynag/meson.build
@@ -3,6 +3,7 @@ executable(
 		'main.c',
 		'nagbar.c',
 		'render.c',
+		'types.c',
 	],
 	include_directories: [sway_inc],
 	dependencies: [
diff --git a/swaynag/nagbar.c b/swaynag/nagbar.c
index 6647e8c2..a20a9095 100644
--- a/swaynag/nagbar.c
+++ b/swaynag/nagbar.c
@@ -8,6 +8,7 @@
 #include "list.h"
 #include "swaynag/nagbar.h"
 #include "swaynag/render.h"
+#include "swaynag/types.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
 static void nop() {
@@ -386,6 +387,10 @@ void nagbar_destroy(struct sway_nagbar *nagbar) {
 	free(nagbar->details.button_up.text);
 	free(nagbar->details.button_down.text);
 
+	if (nagbar->type) {
+		nagbar_type_free(nagbar->type);
+	}
+
 	if (nagbar->layer_surface) {
 		zwlr_layer_surface_v1_destroy(nagbar->layer_surface);
 	}
diff --git a/swaynag/render.c b/swaynag/render.c
index 150ae3f2..134c247e 100644
--- a/swaynag/render.c
+++ b/swaynag/render.c
@@ -4,6 +4,7 @@
 #include "pango.h"
 #include "pool-buffer.h"
 #include "swaynag/nagbar.h"
+#include "swaynag/types.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
 static uint32_t render_message(cairo_t *cairo, struct sway_nagbar *nagbar) {
@@ -22,7 +23,7 @@ static uint32_t render_message(cairo_t *cairo, struct sway_nagbar *nagbar) {
 		return ideal_surface_height;
 	}
 
-	cairo_set_source_u32(cairo, nagbar->colors.text);
+	cairo_set_source_u32(cairo, nagbar->type->text);
 	cairo_move_to(cairo, padding, (int)(ideal_height - text_height) / 2);
 	pango_printf(cairo, nagbar->font, nagbar->scale, true, "%s",
 			nagbar->message);
@@ -39,17 +40,17 @@ static void render_details_scroll_button(cairo_t *cairo,
 	int border = NAGBAR_BUTTON_BORDER_THICKNESS * nagbar->scale;
 	int padding = NAGBAR_BUTTON_PADDING * nagbar->scale;
 
-	cairo_set_source_u32(cairo, nagbar->colors.border);
+	cairo_set_source_u32(cairo, nagbar->type->border);
 	cairo_rectangle(cairo, button->x, button->y,
 			button->width, button->height);
 	cairo_fill(cairo);
 
-	cairo_set_source_u32(cairo, nagbar->colors.button_background);
+	cairo_set_source_u32(cairo, nagbar->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, nagbar->colors.text);
+	cairo_set_source_u32(cairo, nagbar->type->text);
 	cairo_move_to(cairo, button->x + border + padding,
 			button->y + border + (button->height - text_height) / 2);
 	pango_printf(cairo, nagbar->font, nagbar->scale, true, "%s", button->text);
@@ -154,14 +155,14 @@ static uint32_t render_detailed(cairo_t *cairo, struct sway_nagbar *nagbar,
 				&nagbar->details.button_down);
 	}
 
-	cairo_set_source_u32(cairo, nagbar->colors.border);
+	cairo_set_source_u32(cairo, nagbar->type->border);
 	cairo_rectangle(cairo, nagbar->details.x, nagbar->details.y,
 			nagbar->details.width, nagbar->details.height);
 	cairo_fill(cairo);
 
 	cairo_move_to(cairo, nagbar->details.x + padding,
 			nagbar->details.y + padding);
-	cairo_set_source_u32(cairo, nagbar->colors.text);
+	cairo_set_source_u32(cairo, nagbar->type->text);
 	pango_cairo_show_layout(cairo, layout);
 	g_object_unref(layout);
 
@@ -192,17 +193,17 @@ static uint32_t render_button(cairo_t *cairo, struct sway_nagbar *nagbar,
 	button->width = text_width + padding * 2;
 	button->height = text_height + padding * 2;
 
-	cairo_set_source_u32(cairo, nagbar->colors.border);
+	cairo_set_source_u32(cairo, nagbar->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, nagbar->colors.button_background);
+	cairo_set_source_u32(cairo, nagbar->type->button_background);
 	cairo_rectangle(cairo, button->x, button->y,
 			button->width, button->height);
 	cairo_fill(cairo);
 
-	cairo_set_source_u32(cairo, nagbar->colors.text);
+	cairo_set_source_u32(cairo, nagbar->type->text);
 	cairo_move_to(cairo, button->x + padding, button->y + padding);
 	pango_printf(cairo, nagbar->font, nagbar->scale, true, "%s", button->text);
 
@@ -215,7 +216,7 @@ static uint32_t render_to_cairo(cairo_t *cairo, struct sway_nagbar *nagbar) {
 	uint32_t max_height = 0;
 
 	cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
-	cairo_set_source_u32(cairo, nagbar->colors.background);
+	cairo_set_source_u32(cairo, nagbar->type->background);
 	cairo_paint(cairo);
 
 	uint32_t h = render_message(cairo, nagbar);
@@ -240,7 +241,7 @@ static uint32_t render_to_cairo(cairo_t *cairo, struct sway_nagbar *nagbar) {
 	if (max_height > nagbar->height) {
 		max_height += border;
 	}
-	cairo_set_source_u32(cairo, nagbar->colors.border_bottom);
+	cairo_set_source_u32(cairo, nagbar->type->border_bottom);
 	cairo_rectangle(cairo, 0, nagbar->height * nagbar->scale - border,
 			nagbar->width * nagbar->scale, border);
 	cairo_fill(cairo);
diff --git a/swaynag/swaynag.1.scd b/swaynag/swaynag.1.scd
index 879aaf2e..7d250a45 100644
--- a/swaynag/swaynag.1.scd
+++ b/swaynag/swaynag.1.scd
@@ -1,4 +1,4 @@
-swaynagbar(1)
+swaynag(1)
 
 # NAME
 
@@ -13,13 +13,21 @@ _swaynag_ [options...]
 	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*
+*-e, --edge* top|bottom
 	Set the edge to use.
 
-*-f, --font <font>*
+*-f, --font* <font>
 	Set the font to use.
 
 *-h, --help*
@@ -29,24 +37,29 @@ _swaynag_ [options...]
 	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>*
+*-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>*
+*-m, --message* <msg>
 	Set the message text.
 
-*-o, --output <output>*
+*-o, --output* <output>
 	Set the output to use. This should be the name of a _xdg\_output_. If
 	_xdg\_output\_manager_ is not supported, then the first detected output
 	will be used
 
-*-s, --dismiss-button <text>*
+*-s, --dismiss-button* <text>
 	Sets the text for the dismiss nagbar button. The default is _X_.
 
-*-t, --type error|warning*
-	Set the message type.
+*-t, --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
+*-v, --version*
 	Show the version number and quit.
 
+# SEE
+swaynag(5)
diff --git a/swaynag/swaynag.5.scd b/swaynag/swaynag.5.scd
new file mode 100644
index 00000000..a4e05e3a
--- /dev/null
+++ b/swaynag/swaynag.5.scd
@@ -0,0 +1,57 @@
+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]
+color=RRGGBB[AA]
+```
+
+All colors may be given in the form _RRGGBB_ or _RRGGBBAA_. The following
+colors can be set:
+
+*background*
+	The background color for _swaynag_.
+
+*border*
+	The color to use for borders of buttons.
+
+*border-bottom*
+	The color of the border line at the bottom of _swaynag_.
+
+*button-background*
+	The background color for the buttons.
+
+*text*
+	The color of the text.
+
+# EXAMPLE
+```
+font=Monospace 12
+
+[green]
+background=00AA00
+border=006600
+border-bottom=004400
+text=FFFFFF
+button-background=00CC00
+```
+
+# SEE
+swaynag(1)
diff --git a/swaynag/types.c b/swaynag/types.c
new file mode 100644
index 00000000..8dd99d2a
--- /dev/null
+++ b/swaynag/types.c
@@ -0,0 +1,116 @@
+#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/types.h"
+#include "util.h"
+
+void nagbar_types_add_default(list_t *types) {
+	struct sway_nagbar_type *type_error;
+	type_error = calloc(1, sizeof(struct sway_nagbar_type));
+	type_error->name = strdup("error");
+	type_error->button_background = 0x680A0AFF;
+	type_error->background = 0x900000FF;
+	type_error->text = 0xFFFFFFFF;
+	type_error->border = 0xD92424FF;
+	type_error->border_bottom = 0x470909FF;
+	list_add(types, type_error);
+
+	struct sway_nagbar_type *type_warning;
+	type_warning = calloc(1, sizeof(struct sway_nagbar_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 sway_nagbar_type *nagbar_type_get(list_t *types, char *name) {
+	for (int i = 0; i < types->length; i++) {
+		struct sway_nagbar_type *type = types->items[i];
+		if (strcasecmp(type->name, name) == 0) {
+			return type;
+		}
+	}
+	return NULL;
+}
+
+struct sway_nagbar_type *nagbar_type_clone(struct sway_nagbar_type *type) {
+	struct sway_nagbar_type *clone;
+	clone = calloc(1, sizeof(struct sway_nagbar_type));
+	clone->name = strdup(type->name);
+	clone->button_background = type->button_background;
+	clone->background = type->background;
+	clone->text = type->text;
+	clone->border = type->border;
+	clone->border_bottom = type->border_bottom;
+	return clone;
+}
+
+void nagbar_type_free(struct sway_nagbar_type *type) {
+	free(type->name);
+	free(type);
+}
+
+void nagbar_types_free(list_t *types) {
+	while (types->length) {
+		struct sway_nagbar_type *type = types->items[0];
+		nagbar_type_free(type);
+		list_del(types, 0);
+	}
+	list_free(types);
+}
+
+int nagbar_parse_type(int argc, char **argv, struct sway_nagbar_type *type) {
+	enum color_option {
+		COLOR_BACKGROUND,
+		COLOR_BORDER,
+		COLOR_BORDER_BOTTOM,
+		COLOR_BUTTON,
+		COLOR_TEXT,
+	};
+
+	static struct option opts[] = {
+		{"background", required_argument, NULL, COLOR_BACKGROUND},
+		{"border", required_argument, NULL, COLOR_BORDER},
+		{"border-bottom", required_argument, NULL, COLOR_BORDER_BOTTOM},
+		{"button-background", required_argument, NULL, COLOR_BUTTON},
+		{"text", required_argument, NULL, COLOR_TEXT},
+		{0, 0, 0, 0}
+	};
+
+	optind = 1;
+	while (1) {
+		int c = getopt_long(argc, argv, "", opts, NULL);
+		if (c == -1) {
+			break;
+		}
+		switch (c) {
+			case COLOR_BACKGROUND:
+				type->background = parse_color(optarg);
+				break;
+			case COLOR_BORDER:
+				type->border = parse_color(optarg);
+				break;
+			case COLOR_BORDER_BOTTOM:
+				type->border_bottom = parse_color(optarg);
+				break;
+			case COLOR_BUTTON:
+				type->button_background = parse_color(optarg);
+				break;
+			case COLOR_TEXT:
+				type->text = parse_color(optarg);
+				break;
+			default:
+				break;
+		}
+	}
+	return 0;
+}
+