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#include "tile_info.hpp"
#include "engine_context.hpp"
#include "stylist.hpp"
#include "rule_drawer.hpp"
#include "map_data_provider.hpp"
#include "../indexer/scales.hpp"
#include "../base/scope_guard.hpp"
#include "../std/bind.hpp"
namespace
{
struct IDsAccumulator
{
IDsAccumulator(vector<FeatureID> & ids, vector<df::FeatureInfo> const & src)
: m_ids(ids)
, m_src(src)
{
}
void operator()(size_t index)
{
ASSERT_LESS(index, m_src.size(), ());
m_ids.push_back(m_src[index].m_id);
}
vector<FeatureID> & m_ids;
vector<df::FeatureInfo> const & m_src;
};
} // namespace
namespace df
{
TileInfo::TileInfo(TileKey const & key)
: m_key(key)
, m_isCanceled(false)
{}
m2::RectD TileInfo::GetGlobalRect() const
{
return m_key.GetGlobalRect();
}
void TileInfo::ReadFeatureIndex(MapDataProvider const & model)
{
threads::MutexGuard guard(m_mutex);
UNUSED_VALUE(guard);
if (DoNeedReadIndex())
{
CheckCanceled();
model.ReadFeaturesID(bind(&TileInfo::operator(), this, _1), GetGlobalRect(), GetZoomLevel());
sort(m_featureInfo.begin(), m_featureInfo.end());
}
}
void TileInfo::ReadFeatures(MapDataProvider const & model,
MemoryFeatureIndex & memIndex,
EngineContext & context)
{
CheckCanceled();
vector<size_t> indexes;
RequestFeatures(memIndex, indexes);
if (!indexes.empty())
{
context.BeginReadTile(m_key);
// Reading can be interrupted by exception throwing
MY_SCOPE_GUARD(ReleaseReadTile, bind(&EngineContext::EndReadTile, &context, m_key));
vector<FeatureID> featuresToRead;
for_each(indexes.begin(), indexes.end(), IDsAccumulator(featuresToRead, m_featureInfo));
RuleDrawer drawer(bind(&TileInfo::InitStylist, this, _1 ,_2), m_key, context);
model.ReadFeatures(bind(&RuleDrawer::operator(), &drawer, _1), featuresToRead);
}
}
void TileInfo::Cancel(MemoryFeatureIndex & memIndex)
{
m_isCanceled = true;
threads::MutexGuard guard(m_mutex);
UNUSED_VALUE(guard);
memIndex.RemoveFeatures(m_featureInfo);
}
void TileInfo::operator ()(FeatureID const & id)
{
m_featureInfo.push_back(id);
CheckCanceled();
}
void TileInfo::InitStylist(FeatureType const & f, Stylist & s)
{
CheckCanceled();
df::InitStylist(f, GetZoomLevel(), s);
}
//====================================================//
bool TileInfo::DoNeedReadIndex() const
{
return m_featureInfo.empty();
}
void TileInfo::RequestFeatures(MemoryFeatureIndex & memIndex, vector<size_t> & featureIndexes)
{
threads::MutexGuard guard(m_mutex);
memIndex.ReadFeaturesRequest(m_featureInfo, featureIndexes);
}
void TileInfo::CheckCanceled() const
{
if (m_isCanceled)
MYTHROW(ReadCanceledException, ());
}
int TileInfo::GetZoomLevel() const
{
int const upperScale = scales::GetUpperScale();
return (m_key.m_zoomLevel <= upperScale ? m_key.m_zoomLevel : upperScale);
}
} // namespace df
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