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-rw-r--r--src/options.c558
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-/* options.c -- Program options
- * This file is part of redshift-ng.
- *
- * redshift-ng is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * redshift-ng is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with redshift-ng. If not, see <http://www.gnu.org/licenses/>.
- *
- * Copyright (c) 2017 Jon Lund Steffensen <jonlst@gmail.com>
- * Copyright (c) 2025 Mattias Andrée <m@maandree.se>
- */
-#include "common.h"
-
-/* Angular elevation of the sun at which the colour temperature
- transition period starts and ends (in degress).
- Transition during twilight, and while the sun is lower than
- 3.0 degrees above the horizon. */
-#define TRANSITION_LOW LIBRED_SOLAR_ELEVATION_CIVIL_DUSK_DAWN
-#define TRANSITION_HIGH 3.0
-
-/* Default values for parameters. */
-#define DEFAULT_DAY_TEMPERATURE 6500UL
-#define DEFAULT_NIGHT_TEMPERATURE 4500UL
-#define DEFAULT_BRIGHTNESS NEUTRAL_BRIGHTNESS
-#define DEFAULT_GAMMA NEUTRAL_GAMMA
-
-
-/* TODO missing translation */
-USAGE("[-b day:night] [-c file] [-g r:g:b] [-l latitude:longitude | -l provider[:options]]"
- " [-m method[:options]] [-o | -O temperature | -t day:night | -x] [-pPrv] | -hV");
-
-
-/* A brightness string contains either one floating point value,
- or two values separated by a colon. */
-static void
-parse_brightness_string(const char *str, double *bright_day, double *bright_night)
-{
- char *s = strchr(str, ':');
- if (s) {
- *s++ = '\0';
- *bright_day = atof(str);
- *bright_night = atof(s);
- } else {
- *bright_day = *bright_night = atof(str);
- }
-}
-
-/* A gamma string contains either one floating point value,
- or three values separated by colon. */
-static int
-parse_gamma_string(const char *str, double gamma[3])
-{
- char *s = strchr(str, ':');
- if (!s) {
- /* Use value for all channels */
- double g = atof(str);
- gamma[0] = gamma[1] = gamma[2] = g;
- } else {
- /* Parse separate value for each channel */
- char *g_s;
- *s++ = '\0';
- g_s = s;
- s = strchr(s, ':');
- if (!s)
- return -1;
-
- *s++ = '\0';
- gamma[0] = atof(str); /* Red */
- gamma[1] = atof(g_s); /* Blue */
- gamma[2] = atof(s); /* Green */
- }
-
- return 0;
-}
-
-/* Parse transition time string e.g. "04:50". Returns negative on failure,
- otherwise the parsed time is returned as seconds since midnight. */
-static int
-parse_transition_time(const char *str, const char **end)
-{
- char *min = NULL;
- long hours, minutes;
-
- errno = 0;
- hours = strtol(str, (void *)&min, 10);
- if (errno || min == str || min[0] != ':' || hours < 0 || hours >= 24)
- return -1;
-
- min += 1;
- errno = 0;
- minutes = strtol(min, (void *)end, 10);
- if (errno || *end == min || minutes < 0 || minutes >= 60)
- return -1;
-
- return minutes * 60 + hours * 3600;
-}
-
-/* Parse transition range string e.g. "04:50-6:20". Returns negative on
- failure, otherwise zero. Parsed start and end times are returned as seconds
- since midnight. */
-static int
-parse_transition_range(const char *str, struct time_range *range)
-{
- const char *next = NULL, *end = NULL;
- int start_time, end_time;
-
- start_time = parse_transition_time(str, &next);
- if (start_time < 0)
- return -1;
-
- if (!*next) {
- end_time = start_time;
- } else if (*next == '-') {
- end_time = parse_transition_time(&next[1], &end);
- if (end_time < 0 || *end)
- return -1;
- } else {
- return -1;
- }
-
- range->start = start_time;
- range->end = end_time;
-
- return 0;
-}
-
-/* Print help text. */
-static void
-print_help(void)
-{
- /* TRANSLATORS: help output 1
- LAT is latitude, LON is longitude,
- DAY is temperature at daytime,
- NIGHT is temperature at night
- no-wrap */
- printf(_("Usage: %s -l LAT:LON -t DAY:NIGHT [OPTIONS...]\n"), argv0);
- printf("\n");
-
- /* TRANSLATORS: help output 2
- no-wrap */
- printf(_("Set color temperature of display according to time of day.\n"));
- printf("\n");
-
- /* TRANSLATORS: help output 3
- no-wrap */
- printf(_(" -h\t\tDisplay this help message\n"
- " -v\t\tVerbose output\n"
- " -V\t\tShow program version\n"));
- printf("\n");
-
- /* TRANSLATORS: help output 4
- `list' must not be translated
- no-wrap */
- printf(_(" -b DAY:NIGHT\tScreen brightness to apply (between 0.1 and 1.0)\n"
- " -c FILE\tLoad settings from specified configuration file\n"
- " -g R:G:B\tAdditional gamma correction to apply\n"
- " -l LAT:LON\tYour current location\n"
- " -l PROVIDER\tSelect provider for automatic location updates\n"
- " \t\t(Type `list' to see available providers)\n"
- " -m METHOD\tMethod to use to set color temperature\n"
- " \t\t(Type `list' to see available methods)\n"
- " -o\t\tOne shot mode (do not continuously adjust color temperature)\n"
- " -O TEMP\tOne shot manual mode (set color temperature)\n"
- " -p\t\tPrint mode (only print parameters and exit)\n"
- " -P\t\tReset existing gamma ramps before applying new color effect\n"
- " -x\t\tReset mode (remove adjustment from screen)\n"
- " -r\t\tDisable fading between color temperatures\n"
- " -t DAY:NIGHT\tColor temperature to set at daytime/night\n"));
- printf("\n");
-
- /* TRANSLATORS: help output 5 */
- printf(_("The neutral temperature is %luK. Using this value will not change the color\n"
- "temperature of the display. Setting the color temperature to a value higher\n"
- "than this results in more blue light, and setting a lower value will result in\n"
- "more red light.\n"),
- NEUTRAL_TEMPERATURE);
-
- printf("\n");
-
- /* TRANSLATORS: help output 6 */
- printf(_("Default values:\n\n"
- " Daytime temperature: %luK\n"
- " Night temperature: %luK\n"),
- DEFAULT_DAY_TEMPERATURE, DEFAULT_NIGHT_TEMPERATURE);
-
- printf("\n");
-}
-
-/* Print list of adjustment methods. */
-static void
-print_method_list(void)
-{
- size_t i;
- fputs(_("Available adjustment methods:\n"), stdout);
- for (i = 0; gamma_methods[i]; i++)
- printf(" %s\n", gamma_methods[i]->name);
-
- fputs("\n", stdout);
- fputs(_("Specify colon-separated options with `-m METHOD:OPTIONS'.\n"), stdout);
- /* TRANSLATORS: `help' must not be translated. */
- fputs(_("Try `-m METHOD:help' for help.\n"), stdout);
-}
-
-/* Print list of location providers. */
-static void
-print_provider_list(void)
-{
- size_t i;
- fputs(_("Available location providers:\n"), stdout);
- for (i = 0; location_providers[i]; i++)
- printf(" %s\n", location_providers[i]->name);
-
- fputs("\n", stdout);
- fputs(_("Specify colon-separated options with`-l PROVIDER:OPTIONS'.\n"), stdout);
- /* TRANSLATORS: `help' must not be translated. */
- fputs(_("Try `-l PROVIDER:help' for help.\n"), stdout);
-}
-
-/* Return the gamma method with the given name. */
-GCC_ONLY(__attribute__((__pure__, __returns_nonnull__)))
-static const struct gamma_method *
-find_gamma_method(const char *name)
-{
- size_t i;
- for (i = 0; gamma_methods[i]; i++)
- if (!strcasecmp(name, gamma_methods[i]->name))
- return gamma_methods[i];
- /* TRANSLATORS: This refers to the method used to adjust colours e.g. VidMode */
- eprintf(_("Unknown adjustment method `%s'."), name);
-}
-
-/* Return location provider with the given name. */
-GCC_ONLY(__attribute__((__pure__, __returns_nonnull__)))
-static const struct location_provider *
-find_location_provider(const char *name)
-{
- size_t i;
- for (i = 0; location_providers[i]; i++)
- if (!strcasecmp(name, location_providers[i]->name))
- return location_providers[i];
- eprintf(_("Unknown location provider `%s'."), name);
-}
-
-/* Initialize options struct. */
-void
-options_init(struct options *options)
-{
- options->config_filepath = NULL;
-
- /* Default elevation values. */
- options->scheme.high = TRANSITION_HIGH;
- options->scheme.low = TRANSITION_LOW;
-
- /* Settings for day, night and transition period.
- Initialized to indicate that the values are not set yet. */
- options->scheme.use_time = 0;
- options->scheme.dawn.start = -1;
- options->scheme.dawn.end = -1;
- options->scheme.dusk.start = -1;
- options->scheme.dusk.end = -1;
-
- options->scheme.day.temperature = 0;
- options->scheme.day.gamma[0] = NAN;
- options->scheme.day.brightness = NAN;
-
- options->scheme.night.temperature = 0;
- options->scheme.night.gamma[0] = NAN;
- options->scheme.night.brightness = NAN;
-
- /* Temperature for manual mode */
- options->temp_set = 0;
-
- options->method = NULL;
- options->method_args = NULL;
-
- options->provider = NULL;
- options->provider_args = NULL;
-
- options->use_fade = -1;
- options->preserve_gamma = 1;
- options->mode = PROGRAM_MODE_CONTINUAL;
- options->verbose = 0;
-}
-
-/* Parse command line arguments. */
-void
-options_parse_args(struct options *options, int argc, char *argv[])
-{
- const char *provider_name;
- char *s, *end, *value;
- int r;
-
- ARGBEGIN {
- case 'b':
- parse_brightness_string(ARG(), &options->scheme.day.brightness, &options->scheme.night.brightness);
- break;
-
- case 'c':
- free(options->config_filepath);
- options->config_filepath = estrdup(ARG());
- break;
-
- case 'g':
- r = parse_gamma_string(ARG(), options->scheme.day.gamma);
- if (r < 0) {
- weprintf(_("Malformed gamma argument."));
- eprintf(_("Try `-h' for more information."));
- }
- /* Set night gamma to the same value as day gamma.
- To set these to distinct values use the config file. */
- memcpy(options->scheme.night.gamma, options->scheme.day.gamma, sizeof(options->scheme.night.gamma));
- break;
-
- case 'h':
- print_help();
- exit(0);
-
- case 'l':
- value = ARG();
-
- /* Print list of providers if argument is `list' */
- if (!strcasecmp(value, "list")) {
- print_provider_list();
- exit(0);
- }
-
- provider_name = NULL;
-
- /* Don't save the result of strtof(); we simply want
- to know if value can be parsed as a float. */
- errno = 0;
- strtof(value, &end);
- if (!errno && *end == ':') {
- /* Use instead as arguments to `manual'. */
- provider_name = "manual";
- options->provider_args = value;
- } else {
- /* Split off provider arguments. */
- s = strchr(value, ':');
- if (s) {
- *s++ = '\0';
- options->provider_args = s;
- }
-
- provider_name = value;
- }
-
- /* Lookup provider from name. */
- options->provider = find_location_provider(provider_name);
-
- /* Print provider help if arg is `help'. */
- if (options->provider_args && !strcasecmp(options->provider_args, "help")) {
- options->provider->print_help(stdout);
- exit(0);
- }
- break;
-
- case 'm':
- value = ARG();
-
- /* Print list of methods if argument is `list' */
- if (!strcasecmp(value, "list")) {
- print_method_list();
- exit(0);
- }
-
- /* Split off method arguments. */
- s = strchr(value, ':');
- if (s) {
- *s++ = '\0';
- options->method_args = s;
- }
-
- /* Find adjustment method by name. */
- options->method = find_gamma_method(value);
-
- /* Print method help if arg is `help'. */
- if (options->method_args && !strcasecmp(options->method_args, "help")) {
- options->method->print_help(stdout);
- exit(0);
- }
- break;
-
- case 'o':
- options->mode = PROGRAM_MODE_ONE_SHOT;
- break;
-
- case 'O':
- options->mode = PROGRAM_MODE_MANUAL;
- options->temp_set = atoi(ARG());
- break;
-
- case 'p':
- options->mode = PROGRAM_MODE_PRINT;
- break;
-
- case 'P':
- options->preserve_gamma = 0;
- break;
-
- case 'r':
- options->use_fade = 0;
- break;
-
- case 't':
- value = ARG();
- s = strchr(value, ':');
- if (!s) {
- weprintf(_("Malformed temperature argument."));
- eprintf(_("Try `-h' for more information."));
- }
- *s++ = '\0';
- options->scheme.day.temperature = atoi(value);
- options->scheme.night.temperature = atoi(s);
- break;
-
- case 'v':
- options->verbose = 1;
- break;
-
- case 'V':
- printf("%s\n", PACKAGE_STRING);
- exit(0);
- break;
-
- case 'x':
- options->mode = PROGRAM_MODE_RESET;
- break;
-
- default:
- usage();
- } ARGEND;
-
- if (argc)
- usage();
-}
-
-/* Parse a single key-value pair from the configuration file. */
-static void
-parse_config_file_option(const char *key, const char *value, struct options *options)
-{
- if (!strcasecmp(key, "temp-day")) {
- if (!options->scheme.day.temperature)
- options->scheme.day.temperature = atoi(value);
- } else if (!strcasecmp(key, "temp-night")) {
- if (!options->scheme.night.temperature)
- options->scheme.night.temperature = atoi(value);
- } else if (!strcasecmp(key, "transition") || !strcasecmp(key, "fade")) {
- /* "fade" is preferred, "transition" is deprecated as the setting key. */
- if (options->use_fade < 0)
- options->use_fade = !!atoi(value);
- } else if (!strcasecmp(key, "brightness")) {
- if (isnan(options->scheme.day.brightness))
- options->scheme.day.brightness = atof(value);
- if (isnan(options->scheme.night.brightness))
- options->scheme.night.brightness = atof(value);
- } else if (!strcasecmp(key, "brightness-day")) {
- if (isnan(options->scheme.day.brightness))
- options->scheme.day.brightness = atof(value);
- } else if (!strcasecmp(key, "brightness-night")) {
- if (isnan(options->scheme.night.brightness))
- options->scheme.night.brightness = atof(value);
- } else if (!strcasecmp(key, "elevation-high")) {
- options->scheme.high = atof(value);
- } else if (!strcasecmp(key, "elevation-low")) {
- options->scheme.low = atof(value);
- } else if (!strcasecmp(key, "gamma")) {
- if (isnan(options->scheme.day.gamma[0])) {
- if (parse_gamma_string(value, options->scheme.day.gamma) < 0)
- eprintf(_("Malformed gamma setting."));
- memcpy(options->scheme.night.gamma, options->scheme.day.gamma, sizeof(options->scheme.night.gamma));
- }
- } else if (!strcasecmp(key, "gamma-day")) {
- if (isnan(options->scheme.day.gamma[0])) {
- if (parse_gamma_string(value, options->scheme.day.gamma) < 0)
- eprintf(_("Malformed gamma setting."));
- }
- } else if (!strcasecmp(key, "gamma-night")) {
- if (isnan(options->scheme.night.gamma[0])) {
- if (parse_gamma_string(value, options->scheme.night.gamma) < 0)
- eprintf(_("Malformed gamma setting."));
- }
- } else if (!strcasecmp(key, "preserve-gamma")) {
- if (options->preserve_gamma == 1)
- options->preserve_gamma = !!atoi(value);
- } else if (!strcasecmp(key, "adjustment-method")) {
- if (!options->method)
- options->method = find_gamma_method(value);
- } else if (!strcasecmp(key, "location-provider")) {
- if (!options->provider)
- options->provider = find_location_provider(value);
- } else if (!strcasecmp(key, "dawn-time")) {
- if (options->scheme.dawn.start < 0) {
- if (parse_transition_range(value, &options->scheme.dawn) < 0)
- eprintf(_("Malformed dawn-time setting `%s'."), value);
- }
- } else if (!strcasecmp(key, "dusk-time")) {
- if (options->scheme.dusk.start < 0) {
- if (parse_transition_range(value, &options->scheme.dusk) < 0)
- eprintf(_("Malformed dusk-time setting `%s'."), value);
- }
- } else {
- weprintf(_("Unknown configuration setting `%s'."), key);
- }
-}
-
-/* Parse options defined in the config file. */
-void
-options_parse_config_file(struct options *options, struct config_ini_state *config_state)
-{
- struct config_ini_section *section;
- struct config_ini_setting *setting;
-
- /* Read global config settings. */
- section = config_ini_get_section(config_state, "redshift");
- if (!section)
- return;
-
- for (setting = section->settings; setting; setting = setting->next)
- parse_config_file_option(setting->name, setting->value, options);
-}
-
-/* Replace unspecified options with default values. */
-void
-options_set_defaults(struct options *options)
-{
- if (!options->scheme.day.temperature)
- options->scheme.day.temperature = DEFAULT_DAY_TEMPERATURE;
- if (!options->scheme.night.temperature)
- options->scheme.night.temperature = DEFAULT_NIGHT_TEMPERATURE;
-
- if (isnan(options->scheme.day.brightness))
- options->scheme.day.brightness = DEFAULT_BRIGHTNESS;
- if (isnan(options->scheme.night.brightness))
- options->scheme.night.brightness = DEFAULT_BRIGHTNESS;
-
- if (isnan(options->scheme.day.gamma[0])) {
- options->scheme.day.gamma[0] = DEFAULT_GAMMA;
- options->scheme.day.gamma[1] = DEFAULT_GAMMA;
- options->scheme.day.gamma[2] = DEFAULT_GAMMA;
- }
- if (isnan(options->scheme.night.gamma[0])) {
- options->scheme.night.gamma[0] = DEFAULT_GAMMA;
- options->scheme.night.gamma[1] = DEFAULT_GAMMA;
- options->scheme.night.gamma[2] = DEFAULT_GAMMA;
- }
-
- if (options->use_fade < 0)
- options->use_fade = 1;
-}
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