swaynag: split config into own file and fix optind

1 files changed, 292 insertions, 0 deletions

diff --git a/swaynag/config.c b/swaynag/config.c
new file mode 100644
index 00000000..4e7edf2e
--- /dev/null
+++ b/swaynag/config.c
@@ -0,0 +1,292 @@
+#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/nagbar.h"
+#include "swaynag/types.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;
+		}
+
+		if (!buffer) {
+			buffer = strdup(line);
+		} else {
+			buffer = realloc(buffer, strlen(buffer) + strlen(line) + 2);
+			strcat(buffer, line);
+			strcat(buffer, "\n");
+		}
+
+		free(line);
+	}
+
+	if (buffer && buffer[strlen(buffer) - 1] == '\n') {
+		buffer[strlen(buffer) - 1] = '\0';
+	}
+
+	return buffer;
+}
+
+int nagbar_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'},
+		{"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'},
+		{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";
+
+	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 (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]);
+				list_add(nagbar->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 (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
+			if (nagbar) {
+				free(nagbar->font);
+				nagbar->font = strdup(optarg);
+			}
+			break;
+		case 'l': // Detailed Message
+			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
+			if (nagbar) {
+				free(nagbar->details.button_details.text);
+				nagbar->details.button_details.text = strdup(optarg);
+			}
+			break;
+		case 'm': // Message
+			if (nagbar) {
+				free(nagbar->message);
+				nagbar->message = strdup(optarg);
+			}
+			break;
+		case 'o': // Output
+			if (nagbar) {
+				free(nagbar->output.name);
+				nagbar->output.name = strdup(optarg);
+			}
+			break;
+		case 's': // Dismiss Button Text
+			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 (nagbar) {
+				nagbar->type = nagbar_type_get(types, optarg);
+				if (!nagbar->type) {
+					fprintf(stderr, "Unknown type %s\n", optarg);
+					return EXIT_FAILURE;
+				}
+			}
+			break;
+		case 'v': // Version
+			fprintf(stdout, "swaynag version " SWAY_VERSION "\n");
+			return -1;
+		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 *nagbar_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 nagbar_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 = nagbar_parse_options(2, argv, nagbar, types,
+						NULL, NULL);
+			}
+			if (result != 0) {
+				free(line);
+				fclose(config);
+				return result;
+			}
+		}
+
+		free(line);
+	}
+	fclose(config);
+	return 0;
+}
+