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Initial placefile parsing
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Dan Paulat
parent
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commit
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6 changed files with 569 additions and 0 deletions
391
wxdata/source/scwx/gr/placefile.cpp
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391
wxdata/source/scwx/gr/placefile.cpp
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#include <scwx/gr/placefile.hpp>
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#include <scwx/gr/color.hpp>
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#include <scwx/util/logger.hpp>
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#include <scwx/util/streams.hpp>
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#include <fstream>
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#include <regex>
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#include <sstream>
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#include <unordered_map>
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#include <boost/algorithm/string.hpp>
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#include <boost/tokenizer.hpp>
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#include <boost/units/base_units/metric/nautical_mile.hpp>
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#include <boost/units/quantity.hpp>
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#include <boost/units/systems/si/length.hpp>
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namespace scwx
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{
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namespace gr
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{
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static const std::string logPrefix_ {"scwx::gr::placefile"};
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static const auto logger_ = util::Logger::Create(logPrefix_);
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enum class DrawingStatement
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{
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Standard,
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Line,
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Triangles,
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Image,
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Polygon
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};
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class Placefile::Impl
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{
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public:
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explicit Impl() = default;
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~Impl() = default;
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struct Object
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{
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double x_ {};
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double y_ {};
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};
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struct DrawItem
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{
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};
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struct PlaceDrawItem : DrawItem
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{
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boost::units::quantity<boost::units::si::length> threshold_ {};
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boost::gil::rgba8_pixel_t color_ {};
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double latitude_ {};
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double longitude_ {};
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double x_ {};
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double y_ {};
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std::string text_ {};
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};
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void ParseLocation(const std::string& latitudeToken,
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const std::string& longitudeToken,
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double& latitude,
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double& longitude,
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double& x,
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double& y);
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void ProcessLine(const std::string& line,
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const std::vector<std::string>& tokenList);
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std::chrono::seconds refresh_ {-1};
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// Parsing state
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boost::units::quantity<boost::units::si::length> threshold_ {
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999.0 * boost::units::metric::nautical_mile_base_unit::unit_type()};
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boost::gil::rgba8_pixel_t color_ {255, 255, 255, 255};
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ColorMode colorMode_ {ColorMode::RGBA};
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std::vector<Object> objectStack_ {};
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DrawingStatement currentStatement_ {DrawingStatement::Standard};
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// References
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std::unordered_map<std::size_t, bool> iconFiles_ {};
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std::unordered_map<std::size_t, bool> fonts_ {};
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std::vector<std::shared_ptr<DrawItem>> drawItems_ {};
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};
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Placefile::Placefile() : p(std::make_unique<Impl>()) {}
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Placefile::~Placefile() = default;
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Placefile::Placefile(Placefile&&) noexcept = default;
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Placefile& Placefile::operator=(Placefile&&) noexcept = default;
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bool Placefile::IsValid() const
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{
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return p->drawItems_.size() > 0;
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}
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std::shared_ptr<Placefile> Placefile::Load(const std::string& filename)
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{
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logger_->debug("Loading placefile: {}", filename);
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std::ifstream f(filename, std::ios_base::in);
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return Load(f);
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}
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std::shared_ptr<Placefile> Placefile::Load(std::istream& is)
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{
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std::shared_ptr<Placefile> placefile = std::make_shared<Placefile>();
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std::string line;
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while (scwx::util::getline(is, line))
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{
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// Find position of comment (;)
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std::size_t lineEnd = line.find(';');
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if (lineEnd == std::string::npos)
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{
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// Remove comment
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line.erase(lineEnd);
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}
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// Remove extra spacing from line
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boost::trim(line);
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boost::char_separator<char> delimiter(", ");
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boost::tokenizer tokens(line, delimiter);
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std::vector<std::string> tokenList;
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for (auto& token : tokens)
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{
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tokenList.push_back(token);
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}
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if (tokenList.size() >= 1)
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{
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try
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{
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switch (placefile->p->currentStatement_)
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{
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case DrawingStatement::Standard:
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placefile->p->ProcessLine(line, tokenList);
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break;
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case DrawingStatement::Line:
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case DrawingStatement::Triangles:
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case DrawingStatement::Image:
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case DrawingStatement::Polygon:
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if (boost::iequals(tokenList[0], "End:"))
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{
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placefile->p->currentStatement_ = DrawingStatement::Standard;
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}
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break;
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}
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}
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catch (const std::exception&)
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{
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logger_->warn("Could not parse line: {}", line);
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}
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}
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}
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return placefile;
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}
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void Placefile::Impl::ProcessLine(const std::string& line,
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const std::vector<std::string>& tokenList)
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{
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currentStatement_ = DrawingStatement::Standard;
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if (boost::iequals(tokenList[0], "Threshold:"))
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{
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// Threshold: nautical_miles
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if (tokenList.size() >= 2)
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{
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threshold_ =
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static_cast<boost::units::quantity<boost::units::si::length>>(
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std::stod(tokenList[1]) *
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boost::units::metric::nautical_mile_base_unit::unit_type());
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}
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}
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else if (boost::iequals(tokenList[0], "HSLuv:"))
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{
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// HSLuv: value
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if (tokenList.size() >= 2)
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{
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if (boost::iequals(tokenList[1], "true"))
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{
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colorMode_ = ColorMode::HSLuv;
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}
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else
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{
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colorMode_ = ColorMode::RGBA;
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}
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}
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}
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else if (boost::iequals(tokenList[0], "Color:"))
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{
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// Color: red green blue
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if (tokenList.size() >= 2)
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{
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color_ = ParseColor(tokenList, 1, colorMode_);
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}
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}
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else if (boost::iequals(tokenList[0], "Refresh:"))
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{
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// Refresh: minutes
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if (tokenList.size() >= 2)
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{
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refresh_ = std::chrono::minutes {std::stoi(tokenList[1])};
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}
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}
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else if (boost::iequals(tokenList[0], "RefreshSeconds:"))
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{
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// RefreshSeconds: seconds
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if (tokenList.size() >= 2)
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{
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refresh_ = std::chrono::seconds {std::stoi(tokenList[1])};
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}
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}
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else if (boost::iequals(tokenList[0], "Place:"))
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{
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// Place: latitude, longitude, string with spaces
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std::regex re {"Place:\\s*([+\\-0-9\\.]+),\\s*([+\\-0-9\\.]+),\\s*(.+)"};
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std::smatch match;
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std::regex_match(line, match, re);
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if (match.size() >= 4)
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{
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std::shared_ptr<PlaceDrawItem> di = std::make_shared<PlaceDrawItem>();
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di->threshold_ = threshold_;
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di->color_ = color_;
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ParseLocation(match[1].str(),
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match[2].str(),
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di->latitude_,
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di->longitude_,
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di->x_,
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di->y_);
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di->text_ = match[3].str();
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drawItems_.emplace_back(std::move(di));
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}
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else
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{
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logger_->warn("Place statement malformed: {}", line);
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}
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}
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else if (boost::iequals(tokenList[0], "IconFile:"))
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{
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// IconFile: fileNumber, iconWidth, iconHeight, hotX, hotY, fileName
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Icon:"))
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{
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// Icon: lat, lon, angle, fileNumber, iconNumber, hoverText
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Font:"))
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{
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// Font: fontNumber, pixels, flags, "face"
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Text:"))
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{
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// Text: lat, lon, fontNumber, "string", "hover"
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Object:"))
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{
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// Object: lat, lon
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// ...
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// End:
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std::regex re {"Object:\\s*([+\\-0-9\\.]+),\\s*([+\\-0-9\\.]+)"};
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std::smatch match;
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std::regex_match(line, match, re);
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double latitude {};
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double longitude {};
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if (match.size() >= 3)
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{
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latitude = std::stod(match[1].str());
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longitude = std::stod(match[2].str());
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}
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else
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{
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logger_->warn("Object statement malformed: {}", line);
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}
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objectStack_.emplace_back(Object {latitude, longitude});
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}
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else if (boost::iequals(tokenList[0], "End:"))
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{
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// Object End
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if (!objectStack_.empty())
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{
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objectStack_.pop_back();
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}
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else
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{
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logger_->warn("End found without Object");
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}
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}
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else if (boost::iequals(tokenList[0], "Line:"))
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{
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// Line: width, flags [, hover_text]
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// lat, lon
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// ...
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// End:
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currentStatement_ = DrawingStatement::Line;
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Triangles:"))
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{
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// Triangles:
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// lat, lon [, r, g, b [,a]]
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// ...
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// End:
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currentStatement_ = DrawingStatement::Triangles;
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Image:"))
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{
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// Image: image_file
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// lat, lon, Tu [, Tv ]
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// ...
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// End:
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currentStatement_ = DrawingStatement::Image;
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// TODO
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}
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else if (boost::iequals(tokenList[0], "Polygon:"))
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{
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// Polygon:
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// lat1, lon1 [, r, g, b [,a]] ; start of the first contour
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// ...
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// lat1, lon1 ; repeating the first point closes the
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// ; contour
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//
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// lat2, lon2 ; next point starts a new contour
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// ...
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// lat2, lon2 ; and repeating it ends the contour
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// End:
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currentStatement_ = DrawingStatement::Polygon;
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// TODO
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}
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}
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void Placefile::Impl::ParseLocation(const std::string& latitudeToken,
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const std::string& longitudeToken,
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double& latitude,
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double& longitude,
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double& x,
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double& y)
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{
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if (objectStack_.empty())
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{
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// If an Object statement is not currently open, parse latitude and
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// longitude tokens as-is
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latitude = std::stod(latitudeToken);
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longitude = std::stod(longitudeToken);
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}
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else
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{
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// If an Object statement is open, the latitude and longitude are from the
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// outermost Object
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latitude = objectStack_[0].x_;
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longitude = objectStack_[0].y_;
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// The latitude and longitude tokens are interpreted as x, y offsets
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x = std::stod(latitudeToken);
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y = std::stod(longitudeToken);
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// If there are inner Object statements open, treat these as x, y offsets
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for (std::size_t i = 1; i < objectStack_.size(); i++)
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{
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x += objectStack_[i].x_;
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y += objectStack_[i].y_;
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}
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}
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}
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} // namespace gr
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} // namespace scwx
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