summaryrefslogtreecommitdiff
path: root/config.c
blob: 721fbba274b117a4e3d08688c83d40d2b535454a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
// Read a configuration file.
// Config files are formatted as several sections, each containing key = value pairs.
// e.g.:
// [section1]
// thing1 = 33
// thing2 = 454
// [section2]
// asdf = 123

typedef enum {
	SECTION_NONE,
	SECTION_CORE,
	SECTION_KEYBOARD,
	SECTION_COLORS,
	SECTION_EXTENSIONS
} Section;

// all worth it for the -Wformat warnings
#define config_err(cfg, ...) snprintf((cfg)->ted->error, sizeof (cfg)->ted->error - 1, "%s:%u: ",  (cfg)->filename, (cfg)->line_number), \
	snprintf((cfg)->ted->error + strlen((cfg)->ted->error), sizeof (cfg)->ted->error - 1 - strlen((cfg)->ted->error), __VA_ARGS__), \
	(cfg)->error = true

typedef struct {
	Ted *ted;
	char const *filename;
	u32 line_number; // currently processing this line number
	bool error;
} ConfigReader;

// Returns the key combination described by str.
static u32 config_parse_key_combo(ConfigReader *cfg, char const *str) {
	u32 modifier = 0;
	// read modifier
	while (true) {
		if (str_is_prefix(str, "Ctrl+")) {
			if (modifier & KEY_MODIFIER_CTRL) {
				config_err(cfg, "Ctrl+ written twice");
				return 0;
			}
			modifier |= KEY_MODIFIER_CTRL;
			str += strlen("Ctrl+");
		} else if (str_is_prefix(str, "Shift+")) {
			if (modifier & KEY_MODIFIER_SHIFT) {
				config_err(cfg, "Shift+ written twice");
				return 0;
			}
			modifier |= KEY_MODIFIER_SHIFT;
			str += strlen("Shift+");
		} else if (str_is_prefix(str, "Alt+")) {
			if (modifier & KEY_MODIFIER_ALT) {
				config_err(cfg, "Alt+ written twice");
				return 0;
			}
			modifier |= KEY_MODIFIER_ALT;
			str += strlen("Alt+");
		} else break;
	}

	// read key
	SDL_Scancode scancode = SDL_GetScancodeFromName(str);
	if (scancode == SDL_SCANCODE_UNKNOWN) {
		typedef struct {
			char const *keyname1;
			char const *keyname2; // alternate key name
			SDL_Scancode scancode;
			bool shift;
		} KeyName;
		static KeyName const key_names[] = {
			{"Apostrophe", "Single Quote", SDL_SCANCODE_APOSTROPHE, 0},
			{"Backslash", 0, SDL_SCANCODE_BACKSLASH, 0},
			{"Comma", 0, SDL_SCANCODE_COMMA, 0},
			{"Equals", 0, SDL_SCANCODE_EQUALS, 0},
			{"Grave", "Backtick", SDL_SCANCODE_GRAVE, 0},
			{"Keypad Plus", 0, SDL_SCANCODE_KP_PLUS, 0},
			{"Keypad Minus", 0, SDL_SCANCODE_KP_MINUS, 0},
			{"Keypad Divide", 0, SDL_SCANCODE_KP_DIVIDE, 0},
			{"Keypad Multiply", 0, SDL_SCANCODE_KP_MULTIPLY, 0},
			{"Left Bracket", 0, SDL_SCANCODE_LEFTBRACKET, 0}, // [
			{"Right Bracket", 0, SDL_SCANCODE_RIGHTBRACKET, 0}, // ]
			{"Dash", 0, SDL_SCANCODE_MINUS, 0},
			{"Minus", 0, SDL_SCANCODE_MINUS, 0},
			{"Period", 0, SDL_SCANCODE_PERIOD, 0},
			{"Semicolon", 0, SDL_SCANCODE_SEMICOLON, 0},
			{"Slash", 0, SDL_SCANCODE_SLASH, 0},
			{"Enter", 0, SDL_SCANCODE_RETURN, 0},
			{"Keypad Return", 0, SDL_SCANCODE_KP_ENTER, 0},
			{"Exclaim", "Exclamation Mark", SDL_SCANCODE_1, 1},
			{"!", 0, SDL_SCANCODE_1, 1},
			{"At", "@", SDL_SCANCODE_2, 1},
			{"Hash", "#", SDL_SCANCODE_3, 1},
			{"Dollar", "$", SDL_SCANCODE_4, 1},
			{"Percent", "%", SDL_SCANCODE_5, 1},
			{"Caret", "^", SDL_SCANCODE_6, 1},
			{"Ampersand", "&", SDL_SCANCODE_7, 1},
			{"Asterisk", "*", SDL_SCANCODE_8, 1},
			{"Left Paren", "(", SDL_SCANCODE_9, 1},
			{"Right Paren", ")", SDL_SCANCODE_0, 1},
			{"Underscore", "_", SDL_SCANCODE_MINUS, 1},
			{"Plus", "+", SDL_SCANCODE_EQUALS, 1},
			{"Left Brace", "{", SDL_SCANCODE_LEFTBRACKET, 1},
			{"Right Brace", "}", SDL_SCANCODE_RIGHTBRACKET, 1},
			{"Pipe", "|", SDL_SCANCODE_BACKSLASH, 1},
			{"Colon", ":", SDL_SCANCODE_SEMICOLON, 1},
			{"Double Quote", "\"", SDL_SCANCODE_APOSTROPHE, 1},
			{"Less Than", "<", SDL_SCANCODE_COMMA, 1},
			{"Greater Than", ">", SDL_SCANCODE_PERIOD, 1},
			{"Question Mark", "?", SDL_SCANCODE_SLASH, 1},
			{"Question", 0, SDL_SCANCODE_SLASH, 1},
			{"Tilde", "~", SDL_SCANCODE_GRAVE, 1},
		};

		// @OPTIMIZE: sort key_names (and split keyname1/2); do a binary search
		for (size_t i = 0; i < arr_count(key_names); ++i) {
			KeyName const *k = &key_names[i];
			if (streq(str, k->keyname1) || (k->keyname2 && streq(str, k->keyname2))) {
				scancode = k->scancode;
				if (k->shift) {
					if (modifier & KEY_MODIFIER_SHIFT) {
						config_err(cfg, "Shift+%s is redundant.", str);
						return 0;
					}
					modifier |= KEY_MODIFIER_SHIFT;
				}
				break;
			}
		}
		if (scancode == SDL_SCANCODE_UNKNOWN) {
			if (isdigit(str[0])) { // direct scancode numbers, e.g. Ctrl+24 or Ctrl+08
				char *endp;
				long n = strtol(str, &endp, 10);
				if (*endp == '\0' && n > 0 && n < SCANCODE_COUNT) {
					scancode = (SDL_Scancode)n;
				} else {
					config_err(cfg, "Invalid scancode number: %s", str);
					return 0;
				}
			} else {
				config_err(cfg, "Unrecognized key name: %s.", str);
				return 0;
			}
		}
	}
	return (u32)scancode << 3 | modifier;
}

void config_read(Ted *ted, char const *filename) {
	ConfigReader cfg_reader = {
		.ted = ted,
		.filename = filename,
		.line_number = 1,
		.error = false
	};
	ConfigReader *cfg = &cfg_reader;
	Settings *settings = &ted->settings;
	
	typedef struct {
		char const *name;
		bool *control;
	} OptionBool;
	typedef struct {
		char const *name;
		u8 *control, min, max;
	} OptionU8;
	typedef struct {
		char const *name;
		float *control, min, max;
	} OptionFloat;
	typedef struct {
		char const *name;
		u16 *control, min, max;
	} OptionU16;
	typedef struct {
		char const *name;
		char *control;
		size_t buf_size;
	} OptionString;
	// core options
	// (these go at the start so they don't need to be re-computed each time)
	OptionBool const options_bool[] = {
		{"auto-indent", &settings->auto_indent},
		{"auto-add-newline", &settings->auto_add_newline},
		{"auto-reload", &settings->auto_reload},
		{"syntax-highlighting", &settings->syntax_highlighting},
		{"line-numbers", &settings->line_numbers},
		{"restore-session", &settings->restore_session},
	};
	OptionU8 const options_u8[] = {
		{"tab-width", &settings->tab_width, 1, 100},
		{"cursor-width", &settings->cursor_width, 1, 100},
		{"undo-save-time", &settings->undo_save_time, 1, 200},
		{"border-thickness", &settings->border_thickness, 1, 30},
		{"padding", &settings->padding, 0, 100},
		{"scrolloff", &settings->scrolloff, 1, 100},
	};
	OptionFloat const options_float[] = {
		{"cursor-blink-time-on", &settings->cursor_blink_time_on, 0, 1000},
		{"cursor-blink-time-off", &settings->cursor_blink_time_off, 0, 1000},
	};
	OptionU16 const options_u16[] = {
		{"text-size", &settings->text_size, TEXT_SIZE_MIN, TEXT_SIZE_MAX},
		{"max-menu-width", &settings->max_menu_width, 10, U16_MAX},
		{"error-display-time", &settings->error_display_time, 0, U16_MAX},
	};
	OptionString const options_string[] = {
		{"build-default-command", settings->build_default_command, sizeof settings->build_default_command},
	};

	FILE *fp = fopen(filename, "rb");
	if (fp) {
		int line_cap = 4096;
		char *line = ted_malloc(ted, (size_t)line_cap);
		if (line) {
			Section section = SECTION_NONE;

			while (fgets(line, line_cap, fp)) {
				char *newline = strchr(line, '\n');
				if (newline || feof(fp)) {
					if (newline) *newline = '\0';
					char *carriage_return = strchr(line, '\r');
					if (carriage_return) *carriage_return = '\0';

					// ok, we've now read a line.
					switch (line[0]) {
					case '#': // comment
					case '\0': // blank line
						break;
					case '[': { // section header
					#define SECTION_HEADER_HELP "Section headers should look like this: [section-name]"
						char *closing = strchr(line, ']');
						if (!closing) {
							config_err(cfg, "Unmatched [. " SECTION_HEADER_HELP);
						} else if (closing[1] != '\0') {
							config_err(cfg, "Text after section. " SECTION_HEADER_HELP);
						} else {
							*closing = '\0';
							char *section_name = line + 1;
							if (streq(section_name, "keyboard")) {
								section = SECTION_KEYBOARD;
							} else if (streq(section_name, "colors")) {
								section = SECTION_COLORS;
							} else if (streq(section_name, "core")) {
								section = SECTION_CORE;
							} else if (streq(section_name, "extensions")) {
								section = SECTION_EXTENSIONS;
							} else {
								config_err(cfg, "Unrecognized section: [%s].", section_name);
							}
						}
					} break;
					default: {
						char *equals = strchr(line, '=');
						if (equals) {
							char const *key = line;
							*equals = '\0';
							char const *value = equals + 1;
							while (isspace(*key)) ++key;
							while (isspace(*value)) ++value;
							if (equals != line) {
								for (char *p = equals - 1; p > line; --p) {
									// remove trailing spaces after key
									if (isspace(*p)) *p = '\0';
									else break;
								}
							}
							if (key[0] == '\0') {
								config_err(cfg, "Empty property name. This line should look like: key = value");
							} else {
								switch (section) {
								case SECTION_NONE:
									config_err(cfg, "Line outside of any section."
										"Try putting a section header, e.g. [keyboard] before this line?");
									break;
								case SECTION_COLORS: {
									ColorSetting setting = color_setting_from_str(key);
									if (setting != COLOR_UNKNOWN) {
										u32 color = 0;
										if (color_from_str(value, &color)) {
											settings->colors[setting] = color;
										} else {
											config_err(cfg, "'%s' is not a valid color. Colors should look like #rgb, #rgba, #rrggbb, or #rrggbbaa.", value);
										}
									} else {
										config_err(cfg, "No such color option: %s", key);
									}
								} break;
								case SECTION_KEYBOARD: {
									// lines like Ctrl+Down = 10 :down
									u32 key_combo = config_parse_key_combo(cfg, key);
									KeyAction *action = &ted->key_actions[key_combo];
									llong argument = 1;
									if (isdigit(*value)) {
										// read the argument
										char *endp;
										argument = strtoll(value, &endp, 10);
										value = endp;
										while (isspace(*value)) ++value; // skip past space following number
									}
									if (*value == ':') {
										// read the command
										Command command = command_from_str(value + 1);
										if (command != CMD_UNKNOWN) {
											action->command = command;
											action->argument = argument;
											action->line_number = cfg->line_number;
										} else {
											config_err(cfg, "Unrecognized command %s", value);
										}
									} else {
										config_err(cfg, "Expected ':' for key action. This line should look something like: %s = :command.", key);
									}
								} break;
								case SECTION_EXTENSIONS: {
									Language lang = language_from_str(key);
									if (lang == LANG_NONE) {
										config_err(cfg, "Invalid programming language: %s.", key);
									} else {
										char *new_str = malloc(strlen(value) + 1);
										if (!new_str) {
											config_err(cfg, "Out of memory.");
										} else {
											char *dst = new_str;
											// get rid of whitespace in extension list
											for (char const *src = value; *src; ++src)
												if (!isspace(*src))
													*dst++ = *src;
											*dst = 0;
											if (settings->language_extensions[lang])
												free(settings->language_extensions[lang]);
											settings->language_extensions[lang] = new_str;
										}
									}
								} break;
								case SECTION_CORE: {
									char const *endptr;
									long long const integer = strtoll(value, (char **)&endptr, 10);
									bool const is_integer = *endptr == '\0';
									double const floating = strtod(value, (char **)&endptr);
									bool const is_floating = *endptr == '\0';
									bool is_bool = false;
									bool boolean = false;
								#define BOOL_HELP "(should be yes/no/on/off)"
									if (streq(value, "yes") || streq(value, "on")) {
										is_bool = true;
										boolean = true;
									} else if (streq(value, "no") || streq(value, "off")) {
										is_bool = true;
										boolean = false;
									}

									// go through all types of options
									for (size_t i = 0; i < arr_count(options_bool); ++i) {
										OptionBool const *option = &options_bool[i];
										if (streq(key, option->name)) {
											if (is_bool)
												*option->control = boolean;
											else
												config_err(cfg, "Invalid %s: %s. This should be yes, no, on, or off.", option->name, value);
										}
									}

									for (size_t i = 0; i < arr_count(options_u8); ++i) {
										OptionU8 const *option = &options_u8[i];
										if (streq(key, option->name)) {
											if (is_integer && integer >= option->min && integer <= option->max)
												*option->control = (u8)integer;
											else
												config_err(cfg, "Invalid %s: %s. This should be an integer from %u to %u.", option->name, value, option->min, option->max);
										}
									}

									for (size_t i = 0; i < arr_count(options_u16); ++i) {
										OptionU16 const *option = &options_u16[i];
										if (streq(key, option->name)) {
											if (is_integer && integer >= option->min && integer <= option->max)
												*option->control = (u16)integer;
											else
												config_err(cfg, "Invalid %s: %s. This should be an integer from %u to %u.", option->name, value, option->min, option->max);
										}
									}


									for (size_t i = 0; i < arr_count(options_float); ++i) {
										OptionFloat const *option = &options_float[i];
										if (streq(key, option->name)) {
											if (is_floating && floating >= option->min && floating <= option->max)
												*option->control = (float)floating;
											else
												config_err(cfg, "Invalid %s: %s. This should be a number from %g to %g.", option->name, value, option->min, option->max);
										}
									}
									
									for (size_t i = 0; i < arr_count(options_string); ++i) {
										OptionString const *option = &options_string[i];
										if (streq(key, option->name)) {
											if (strlen(value) >= option->buf_size) {
												config_err(cfg, "%s is too long (length: %zu, maximum length: %zu).", key, strlen(value), option->buf_size - 1);
											} else {
												str_cpy(option->control, option->buf_size, value);
											}
										}
									}

								} break;
								}
							}
						} else {
							config_err(cfg, "Invalid line syntax. "
								"Lines should either look like [section-name] or key = value");
						}
					} break;
					}

					if (cfg->error) break;

					++cfg->line_number;
				} else {
					config_err(cfg, "Line is too long.");
					break;
				}
			}
		}
		free(line);
		if (ferror(fp))
			ted_seterr(ted, "Error reading %s.", filename);
		fclose(fp);
	} else {
		ted_seterr(ted, "Couldn't open file %s.", filename);
	}
}

static void settings_free(Settings *settings) {
	for (u16 i = 0; i < LANG_COUNT; ++i) {
		free(settings->language_extensions[i]);
		settings->language_extensions[i] = NULL;
	}
}