path: root/src/config.c

/*
 * Calcurse - text-based organizer
 *
 * Copyright (c) 2004-2012 calcurse Development Team <misc@calcurse.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the
 *        following disclaimer in the documentation and/or other
 *        materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Send your feedback or comments to : misc@calcurse.org
 * Calcurse home page : http://calcurse.org
 *
 */

#include <ctype.h>
#include <unistd.h>

#include "calcurse.h"

typedef int (*config_fn_parse_t) (void *, const char *);
typedef int (*config_fn_serialize_t) (char *, void *);

struct confvar {
  const char *key;
  config_fn_parse_t fn_parse;
  config_fn_serialize_t fn_serialize;
  void *target;
};

static int config_parse_bool(unsigned *, const char *);
static int config_serialize_bool(char *, unsigned *);
static int config_parse_int(int *, const char *);
static int config_serialize_int(char *, int *);
static int config_parse_unsigned(unsigned *, const char *);
static int config_serialize_unsigned(char *, unsigned *);
static int config_parse_str(char *, const char *);
static int config_serialize_str(char *, const char *);
static int config_parse_calendar_view(void *, const char *);
static int config_serialize_calendar_view(char *, void *);
static int config_parse_first_day_of_week(void *, const char *);
static int config_serialize_first_day_of_week(char *, void *);
static int config_parse_color_theme(void *, const char *);
static int config_serialize_color_theme(char *, void *);
static int config_parse_layout(void *, const char *);
static int config_serialize_layout(char *, void *);
static int config_parse_sidebar_width(void *, const char *);
static int config_serialize_sidebar_width(char *, void *);
static int config_parse_output_datefmt(void *, const char *);
static int config_serialize_output_datefmt(char *, void *);
static int config_parse_input_datefmt(void *, const char *);
static int config_serialize_input_datefmt(char *, void *);

#define CONFIG_HANDLER_BOOL(var) (config_fn_parse_t) config_parse_bool, \
  (config_fn_serialize_t) config_serialize_bool, &(var)
#define CONFIG_HANDLER_INT(var) (config_fn_parse_t) config_parse_int, \
  (config_fn_serialize_t) config_serialize_int, &(var)
#define CONFIG_HANDLER_UNSIGNED(var) (config_fn_parse_t) config_parse_unsigned, \
  (config_fn_serialize_t) config_serialize_unsigned, &(var)
#define CONFIG_HANDLER_STR(var) (config_fn_parse_t) config_parse_str, \
  (config_fn_serialize_t) config_serialize_str, &(var)

static const struct confvar confmap[] = {
  {"appearance.calendarview", config_parse_calendar_view,
   config_serialize_calendar_view, NULL},
  {"appearance.layout", config_parse_layout, config_serialize_layout, NULL},
  {"appearance.notifybar", CONFIG_HANDLER_BOOL(nbar.show)},
  {"appearance.sidebarwidth", config_parse_sidebar_width,
   config_serialize_sidebar_width, NULL},
  {"appearance.theme", config_parse_color_theme, config_serialize_color_theme,
   NULL},
  {"daemon.enable", CONFIG_HANDLER_BOOL(dmon.enable)},
  {"daemon.log", CONFIG_HANDLER_BOOL(dmon.log)},
  {"format.inputdate", config_parse_input_datefmt,
   config_serialize_input_datefmt, NULL},
  {"format.notifydate", CONFIG_HANDLER_STR(nbar.datefmt)},
  {"format.notifytime", CONFIG_HANDLER_STR(nbar.timefmt)},
  {"format.outputdate", config_parse_output_datefmt,
   config_serialize_output_datefmt, NULL},
  {"general.autogc", CONFIG_HANDLER_BOOL(conf.auto_gc)},
  {"general.autosave", CONFIG_HANDLER_BOOL(conf.auto_save)},
  {"general.confirmdelete", CONFIG_HANDLER_BOOL(conf.confirm_delete)},
  {"general.confirmquit", CONFIG_HANDLER_BOOL(conf.confirm_quit)},
  {"general.firstdayofweek", config_parse_first_day_of_week,
   config_serialize_first_day_of_week, NULL},
  {"general.periodicsave", CONFIG_HANDLER_UNSIGNED(conf.periodic_save)},
  {"general.progressbar", CONFIG_HANDLER_BOOL(conf.progress_bar)},
  {"general.systemdialogs", CONFIG_HANDLER_BOOL(conf.system_dialogs)},
  {"notification.command", CONFIG_HANDLER_STR(nbar.cmd)},
  {"notification.notifyall", CONFIG_HANDLER_BOOL(nbar.notify_all)},
  {"notification.warning", CONFIG_HANDLER_INT(nbar.cntdwn)}
};

struct config_save_status {
  FILE *fp;
  int done[sizeof(confmap) / sizeof(confmap[0])];
};

typedef int (*config_fn_walk_cb_t) (const char *, const char *, void *);
typedef int (*config_fn_walk_junk_cb_t) (const char *, void *);

static int config_parse_bool(unsigned *dest, const char *val)
{
  if (strcmp(val, "yes") == 0)
    *dest = 1;
  else if (strcmp(val, "no") == 0)
    *dest = 0;
  else
    return 0;

  return 1;
}

static int config_parse_unsigned(unsigned *dest, const char *val)
{
  if (is_all_digit(val))
    *dest = atoi(val);
  else
    return 0;

  return 1;
}

static int config_parse_int(int *dest, const char *val)
{
  if ((*val == '+' || *val == '-' || isdigit(*val)) && is_all_digit(val + 1))
    *dest = atoi(val);
  else
    return 0;

  return 1;
}

static int config_parse_str(char *dest, const char *val)
{
  strncpy(dest, val, BUFSIZ);
  return 1;
}

static int config_parse_color(int *dest, const char *val)
{
  if (!strcmp(val, "black"))
    *dest = COLOR_BLACK;
  else if (!strcmp(val, "red"))
    *dest = COLOR_RED;
  else if (!strcmp(val, "green"))
    *dest = COLOR_GREEN;
  else if (!strcmp(val, "yellow"))
    *dest = COLOR_YELLOW;
  else if (!strcmp(val, "blue"))
    *dest = COLOR_BLUE;
  else if (!strcmp(val, "magenta"))
    *dest = COLOR_MAGENTA;
  else if (!strcmp(val, "cyan"))
    *dest = COLOR_CYAN;
  else if (!strcmp(val, "white"))
    *dest = COLOR_WHITE;
  else if (!strcmp(val, "default"))
    *dest = background;
  else
    return 0;

  return 1;
}

static int config_parse_color_pair(int *dest1, int *dest2, const char *val)
{
  char s1[BUFSIZ], s2[BUFSIZ];

  if (sscanf(val, "%s on %s", s1, s2) != 2)
    return 0;

  return (config_parse_color(dest1, s1) && config_parse_color(dest2, s2));
}

static int config_parse_calendar_view(void *dummy, const char *val)
{
  if (!strcmp(val, "monthly"))
    calendar_set_view(CAL_MONTH_VIEW);
  else if (!strcmp(val, "weekly"))
    calendar_set_view(CAL_WEEK_VIEW);
  else
    return 0;

  return 1;
}

static int config_parse_first_day_of_week(void *dummy, const char *val)
{
  if (!strcmp(val, "monday"))
    calendar_set_first_day_of_week(MONDAY);
  else if (!strcmp(val, "sunday"))
    calendar_set_first_day_of_week(SUNDAY);
  else
    return 0;

  return 1;
}

static int config_parse_color_theme(void *dummy, const char *val)
{
  int color1, color2;
  if (!config_parse_color_pair(&color1, &color2, val))
    return 0;
  init_pair(COLR_CUSTOM, color1, color2);
  return 1;
}

static int config_parse_layout(void *dummy, const char *val)
{
  wins_set_layout(atoi(val));
  return 1;
}

static int config_parse_sidebar_width(void *dummy, const char *val)
{
  wins_set_sbar_width(atoi(val));
  return 1;
}

static int config_parse_output_datefmt(void *dummy, const char *val)
{
  if (val[0] != '\0')
    return config_parse_str(conf.output_datefmt, val);
  return 1;
}

static int config_parse_input_datefmt(void *dummy, const char *val)
{
  if (config_parse_int(&conf.input_datefmt, val)) {
    if (conf.input_datefmt <= 0 || conf.input_datefmt > DATE_FORMATS)
      conf.input_datefmt = 1;
    return 1;
  } else
    return 0;
}

/* Set a configuration variable. */
static int config_set_conf(const char *key, const char *value)
{
  int i;

  if (!key)
    return -1;

  for (i = 0; i < sizeof(confmap) / sizeof(confmap[0]); i++) {
    if (!strcmp(confmap[i].key, key))
      return confmap[i].fn_parse(confmap[i].target, value);
  }

  return -1;
}

static int config_serialize_bool(char *dest, unsigned *val)
{
  if (*val) {
    dest[0] = 'y';
    dest[1] = 'e';
    dest[2] = 's';
    dest[3] = '\0';
  } else {
    dest[0] = 'n';
    dest[1] = 'o';
    dest[2] = '\0';
  }

  return 1;
}

static int config_serialize_unsigned(char *dest, unsigned *val)
{
  snprintf(dest, BUFSIZ, "%u", *val);
  return 1;
}

static int config_serialize_int(char *dest, int *val)
{
  snprintf(dest, BUFSIZ, "%d", *val);
  return 1;
}

static int config_serialize_str(char *dest, const char *val)
{
  strncpy(dest, val, BUFSIZ);
  return 1;
}

/*
 * Return a string defining the color theme in the form:
 *       foreground color 'on' background color
 * in order to dump this data in the configuration file.
 * Color numbers follow the ncurses library definitions.
 * If ncurses library was compiled with --enable-ext-funcs,
 * then default color is -1.
 */
static void config_color_theme_name(char *theme_name)
{
#define MAXCOLORS		8
#define NBCOLORS		2
#define DEFAULTCOLOR		255
#define DEFAULTCOLOR_EXT	-1

  int i;
  short color[NBCOLORS];
  const char *color_name[NBCOLORS];
  const char *default_color = "default";
  const char *name[MAXCOLORS] = {
    "black",
    "red",
    "green",
    "yellow",
    "blue",
    "magenta",
    "cyan",
    "white"
  };

  if (!colorize)
    strncpy(theme_name, "0", BUFSIZ);
  else {
    pair_content(COLR_CUSTOM, &color[0], &color[1]);
    for (i = 0; i < NBCOLORS; i++) {
      if ((color[i] == DEFAULTCOLOR) || (color[i] == DEFAULTCOLOR_EXT))
        color_name[i] = default_color;
      else if (color[i] >= 0 && color[i] <= MAXCOLORS)
        color_name[i] = name[color[i]];
      else {
        EXIT(_("unknown color"));
        /* NOTREACHED */
      }
    }
    snprintf(theme_name, BUFSIZ, "%s on %s", color_name[0], color_name[1]);
  }
}

static int config_serialize_calendar_view(char *buf, void *dummy)
{
  if (calendar_get_view() == CAL_WEEK_VIEW)
    strcpy(buf, "weekly");
  else
    strcpy(buf, "monthly");

  return 1;
}

static int config_serialize_first_day_of_week(char *buf, void *dummy)
{
  if (calendar_week_begins_on_monday())
    strcpy(buf, "monday");
  else
    strcpy(buf, "sunday");

  return 1;
}

static int config_serialize_color_theme(char *buf, void *dummy)
{
  config_color_theme_name(buf);
  return 1;
}

static int config_serialize_layout(char *buf, void *dummy)
{
  int tmp = wins_layout();
  return config_serialize_int(buf, &tmp);
}

static int config_serialize_sidebar_width(char *buf, void *dummy)
{
  int tmp = wins_sbar_wperc();
  return config_serialize_int(buf, &tmp);
}

static int config_serialize_output_datefmt(char *buf, void *dummy)
{
  return config_serialize_str(buf, conf.output_datefmt);
}

static int config_serialize_input_datefmt(char *buf, void *dummy)
{
  return config_serialize_int(buf, &conf.input_datefmt);
}

/* Serialize the value of a configuration variable. */
static int
config_serialize_conf(char *buf, const char *key,
                      struct config_save_status *status)
{
  int i;

  if (!key)
    return -1;

  for (i = 0; i < sizeof(confmap) / sizeof(confmap[0]); i++) {
    if (!strcmp(confmap[i].key, key)) {
      if (confmap[i].fn_serialize(buf, confmap[i].target)) {
        if (status)
          status->done[i] = 1;
        return 1;
      } else
        return 0;
    }
  }

  return -1;
}

static void
config_file_walk(config_fn_walk_cb_t fn_cb,
                 config_fn_walk_junk_cb_t fn_junk_cb, void *data)
{
  FILE *data_file;
  char buf[BUFSIZ], e_conf[BUFSIZ];
  char *key, *value;

  data_file = fopen(path_conf, "r");
  EXIT_IF(data_file == NULL, _("failed to open configuration file"));

  pthread_mutex_lock(&nbar.mutex);
  for (;;) {
    if (fgets(buf, sizeof buf, data_file) == NULL)
      break;
    io_extract_data(e_conf, buf, sizeof buf);

    if (*e_conf == '\0') {
      if (fn_junk_cb)
        fn_junk_cb(buf, data);
      continue;
    }

    key = e_conf;
    value = strchr(e_conf, '=');
    if (value) {
      *value = '\0';
      value++;
    }
    else {
      EXIT(_("invalid configuration directive: \"%s\""), e_conf);
    }

    if (strcmp(key, "auto_save") == 0 ||
        strcmp(key, "auto_gc") == 0 ||
        strcmp(key, "periodic_save") == 0 ||
        strcmp(key, "confirm_quit") == 0 ||
        strcmp(key, "confirm_delete") == 0 ||
        strcmp(key, "skip_system_dialogs") == 0 ||
        strcmp(key, "skip_progress_bar") == 0 ||
        strcmp(key, "calendar_default_view") == 0 ||
        strcmp(key, "week_begins_on_monday") == 0 ||
        strcmp(key, "color-theme") == 0 ||
        strcmp(key, "layout") == 0 ||
        strcmp(key, "side-bar_width") == 0 ||
        strcmp(key, "notify-bar_show") == 0 ||
        strcmp(key, "notify-bar_date") == 0 ||
        strcmp(key, "notify-bar_clock") == 0 ||
        strcmp(key, "notify-bar_warning") == 0 ||
        strcmp(key, "notify-bar_command") == 0 ||
        strcmp(key, "notify-all") == 0 ||
        strcmp(key, "output_datefmt") == 0 ||
        strcmp(key, "input_datefmt") == 0 ||
        strcmp(key, "notify-daemon_enable") == 0 ||
        strcmp(key, "notify-daemon_log") == 0) {
      WARN_MSG(_("Pre-3.0.0 configuration file format detected, "
                 "please upgrade running `calcurse-upgrade`."));
    }

    if (value && (*value == '\0' || *value == '\n')) {
      /* Backward compatibility mode. */
      if (fgets(buf, sizeof buf, data_file) == NULL)
        break;
      io_extract_data(e_conf, buf, sizeof buf);
      value = e_conf;
    }

    fn_cb(key, value, data);
  }
  file_close(data_file, __FILE_POS__);
  pthread_mutex_unlock(&nbar.mutex);
}

static int config_load_cb(const char *key, const char *value, void *dummy)
{
  int result = config_set_conf(key, value);

  if (result < 0)
    EXIT(_("configuration variable unknown: \"%s\""), key);
  /* NOTREACHED */
  else if (result == 0)
    EXIT(_("wrong configuration variable format for \"%s\""), key);
  /* NOTREACHED */

  return 1;
}

/* Load the user configuration. */
void config_load(void)
{
  config_file_walk(config_load_cb, NULL, NULL);
}

static int config_save_cb(const char *key, const char *value, void *status)
{
  char buf[BUFSIZ];
  int result =
      config_serialize_conf(buf, key, (struct config_save_status *)status);

  if (result < 0)
    EXIT(_("configuration variable unknown: \"%s\""), key);
  /* NOTREACHED */
  else if (result == 0)
    EXIT(_("wrong configuration variable format for \"%s\""), key);
  /* NOTREACHED */

  fputs(key, ((struct config_save_status *)status)->fp);
  fputc('=', ((struct config_save_status *)status)->fp);
  fputs(buf, ((struct config_save_status *)status)->fp);
  fputc('\n', ((struct config_save_status *)status)->fp);

  return 1;
}

static int config_save_junk_cb(const char *data, void *status)
{
  fputs(data, ((struct config_save_status *)status)->fp);
  return 1;
}

/* Save the user configuration. */
unsigned config_save(void)
{
  char tmppath[BUFSIZ];
  char *tmpext;
  struct config_save_status status;
  int i;

  if (read_only)
    return 1;

  strncpy(tmppath, get_tempdir(), BUFSIZ);
  strncat(tmppath, "/" CONF_PATH_NAME ".", BUFSIZ - strlen(tmppath) - 1);
  if ((tmpext = new_tempfile(tmppath, TMPEXTSIZ)) == NULL)
    return 0;
  strncat(tmppath, tmpext, BUFSIZ - strlen(tmppath) - 1);
  mem_free(tmpext);

  status.fp = fopen(tmppath, "w");
  if (!status.fp)
    return 0;

  memset(status.done, 0, sizeof(status.done));

  config_file_walk(config_save_cb, config_save_junk_cb, (void *)&status);

  /* Set variables that were missing from the configuration file. */
  for (i = 0; i < sizeof(confmap) / sizeof(confmap[0]); i++) {
    if (!status.done[i])
      config_save_cb(confmap[i].key, NULL, &status);
  }

  file_close(status.fp, __FILE_POS__);

  if (io_file_cp(tmppath, path_conf))
    unlink(tmppath);

  return 1;
}