Method MatchRegions

libs/search/geocoder.cpp:928–1007

}

void Geocoder::MatchRegions(BaseContext & ctx, Region::Type type)
{
  TRACE(MatchRegions);

  switch (type)
  {
  case Region::TYPE_STATE:
    // Tries to skip state matching and go to cities matching.
    // Then, performs states matching.
    MatchCities(ctx);
    break;
  case Region::TYPE_COUNTRY:
    // Tries to skip country matching and go to states matching.
    // Then, performs countries matching.
    MatchRegions(ctx, Region::TYPE_STATE);
    break;
  case Region::TYPE_COUNT: ASSERT(false, ("Invalid region type.")); return;
  }

  auto const & regions = m_regions[type];

  auto const & fileName = m_context->GetName();
  bool const isWorld = m_context->GetInfo()->GetType() == MwmInfo::WORLD;

  // Try to match regions.
  for (auto const & p : regions)
  {
    BailIfCancelled();

    auto const & tokenRange = p.first;
    if (ctx.HasUsedTokensInRange(tokenRange))
      continue;

    for (auto const & region : p.second)
    {
      bool matches = false;

      // On the World.mwm we need to check that CITY - STATE - COUNTRY
      // form a nested sequence.  Otherwise, as mwm borders do not
      // intersect state or country boundaries, it's enough to check
      // mwm that is currently being processed belongs to region.
      if (isWorld)
      {
        matches =
            ctx.m_regions.empty() || m_infoGetter.BelongsToAnyRegion(region.m_center, ctx.m_regions.back()->m_ids);
      }
      else
      {
        matches = m_infoGetter.BelongsToAnyRegion(fileName, region.m_ids);
      }

      if (!matches)
        continue;

      ctx.m_regions.push_back(&region);
      SCOPE_GUARD(cleanup, [&ctx]() { ctx.m_regions.pop_back(); });

      ScopedMarkTokens mark(ctx.m_tokens, BaseContext::FromRegionType(type), tokenRange);