FromToFeature.h

Go to the documentation of this file.

#ifndef OSMSCOUT_FEATURE_FROM_TO_FEATURE_H
#define OSMSCOUT_FEATURE_FROM_TO_FEATURE_H
 
/*
  This source is part of the libosmscout library
  Copyright (C) 2014  Tim Teulings
 
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
 
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
 
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/
 
#include <osmscout/TypeConfig.h>
#include <osmscout/TypeFeature.h>
 
#include <osmscout/FeatureReader.h>
 
namespace osmscout {
 
  class OSMSCOUT_API FromToFeatureValue : public FeatureValue
  {
  private:
    std::string from;
    std::string to;
 
  public:
    FromToFeatureValue() = default;
    FromToFeatureValue(const FromToFeatureValue& featureValue) = default;
 
    explicit FromToFeatureValue(const std::string_view& from,
                                const std::string_view& to)
      : from(from),
        to(to)
    {
      // no code
    }
 
    const std::string& GetFrom() const
    {
      return from;
    }
 
    void SetFrom(const std::string_view& from)
    {
      FromToFeatureValue::from=from;
    }
 
    const std::string& GetTo() const
    {
      return to;
    }
 
    void SetTo(const std::string_view& to)
    {
      FromToFeatureValue::to=to;
    }
 
    std::string GetLabel(const Locale &/*locale*/, size_t /*labelIndex*/) const override
    {
      if (!from.empty() && ! to.empty()) {
        return from + " => " + to;
      }
 
      if (!from.empty())  {
        return from + "=>";
      }
 
      if (!to.empty())  {
        return "=> " + to;
      }
 
      return "";
    }
 
    void Read(FileScanner& scanner) override;
    void Write(FileWriter& writer) override;
 
    FromToFeatureValue& operator=(const FeatureValue& other) override;
    bool operator==(const FeatureValue& other) const override;
  };
 
  class OSMSCOUT_API FromToFeature : public Feature
  {
  private:
    TagId tagFrom;
    TagId tagTo;
 
  public:
    static const char* const NAME;

    static const char* const NUMBER_LABEL;

    static const size_t      NUMBER_LABEL_INDEX;
 
  public:
    FromToFeature();
    void Initialize(TagRegistry& tagRegistry) override;
 
    std::string GetName() const override;
 
    size_t GetValueAlignment() const override;
    size_t GetValueSize() const override;
    FeatureValue* AllocateValue(void* buffer) override;
 
    void Parse(TagErrorReporter& reporter,
               const TagRegistry& tagRegistry,
               const FeatureInstance& feature,
               const ObjectOSMRef& object,
               const TagMap& tags,
               FeatureValueBuffer& buffer) const override;
  };
 
  using FromToFeatureValueReader = FeatureValueReader<FromToFeature, FromToFeatureValue>;
}
 
#endif