config_cache.c

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#include "config.h"
#include <stdbool.h>
#include <string.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "config_cache.h"
#include "neomutt.h"
 
static bool CacheActive = false;
static const struct Slist *CachedAssumedCharset = NULL;
static const char *CachedCharset = NULL;
static const char *CachedMaildirFieldDelimiter = NULL;
 
static int cc_config_observer(struct NotifyCallback *nc)
{
  if (nc->event_type != NT_CONFIG)
    return 0; // LCOV_EXCL_LINE
  if (!nc->event_data)
    return -1; // LCOV_EXCL_LINE
 
  struct EventConfig *ev_c = nc->event_data;
  if (!ev_c->name || !ev_c->he)
    return 0; // LCOV_EXCL_LINE
 
  if (mutt_str_equal(ev_c->name, "assumed_charset"))
  {
    CachedAssumedCharset = (const struct Slist *) cs_subset_he_native_get(ev_c->sub,
                                                                          ev_c->he, NULL);
  }
  else if (mutt_str_equal(ev_c->name, "charset"))
  {
    CachedCharset = (const char *) cs_subset_he_native_get(ev_c->sub, ev_c->he, NULL);
  }
  else if (mutt_str_equal(ev_c->name, "maildir_field_delimiter"))
  {
    CachedMaildirFieldDelimiter = (const char *) cs_subset_he_native_get(ev_c->sub,
                                                                         ev_c->he, NULL);
  }
 
  mutt_debug(LL_DEBUG5, "config done\n");
  return 0;
}
 
static void cache_setup(void)
{
  if (CacheActive)
    return; // LCOV_EXCL_LINE
 
  notify_observer_add(NeoMutt->sub->notify, NT_CONFIG, cc_config_observer, NULL);
 
  CachedAssumedCharset = cs_subset_slist(NeoMutt->sub, "assumed_charset");
  CachedCharset = cs_subset_string(NeoMutt->sub, "charset");
  CachedMaildirFieldDelimiter = cs_subset_string(NeoMutt->sub, "maildir_field_delimiter");
 
  CacheActive = true;
}
 
const struct Slist *cc_assumed_charset(void)
{
  if (!CacheActive)
  {
    cache_setup();
    CachedAssumedCharset = cs_subset_slist(NeoMutt->sub, "assumed_charset");
  }
 
  return CachedAssumedCharset;
}
 
const char *cc_charset(void)
{
  if (!CacheActive)
  {
    cache_setup();
    CachedCharset = cs_subset_string(NeoMutt->sub, "charset");
  }
 
  return CachedCharset;
}
 
const char *cc_maildir_field_delimiter(void)
{
  if (!CacheActive)
  {
    cache_setup();
    CachedMaildirFieldDelimiter = cs_subset_string(NeoMutt->sub, "maildir_field_delimiter");
  }
 
  return CachedMaildirFieldDelimiter;
}
 
void config_cache_cleanup(void)
{
  if (NeoMutt)
    notify_observer_remove(NeoMutt->sub->notify, cc_config_observer, NULL);
 
  // Don't free them, the config system owns the data
  CachedAssumedCharset = NULL;
  CachedCharset = NULL;
  CachedMaildirFieldDelimiter = NULL;
 
  CacheActive = false;
}