NumericConverterRegistry.cpp

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/*  SPDX-License-Identifier: GPL-2.0-or-later */
/**********************************************************************
 
 Audacity: A Digital Audio Editor
 
 @file NumericConverterRegistry.cpp
 
 Dmitry Vedenko
 
 **********************************************************************/
#include "NumericConverterRegistry.h"
 
namespace
{
const auto PathStart = L"NumericConverterRegistry";
}
 
 NumericConverterRegistryItem::NumericConverterRegistryItem(
   const Identifier& internalName, const NumericFormatSymbol& _symbol,
   NumericConverterFormatterFactoryPtr _factory)
    : SingleItem { internalName }
    , symbol { _symbol }
    , factory { std::move(_factory) }
{
}
 
 NumericConverterRegistryItem::NumericConverterRegistryItem(
    const Identifier& internalName, const NumericFormatSymbol& _symbol,
    const TranslatableString& _fractionLabel,
    NumericConverterFormatterFactoryPtr _factory)
     : SingleItem { internalName }
     , symbol { _symbol }
     , fractionLabel { _fractionLabel }
     , factory { std::move(_factory) }
 {
 }
 
 NumericConverterRegistryItem::~NumericConverterRegistryItem()
 {
 }
 
Registry::GroupItem<NumericConverterRegistryTraits>&
   NumericConverterRegistry::Registry()
{
   static Registry::GroupItem<NumericConverterRegistryTraits>
      registry { PathStart };
   return registry;
}
 
void NumericConverterRegistry::Visit(
   const FormatterContext& context, const NumericConverterType& type,
   Visitor visitor)
{
   static Registry::OrderingPreferenceInitializer init {
      PathStart,
      { { L"", L"parsedTime,beats,parsedFrequency,parsedBandwith" } },
   };
 
   Registry::GroupItem<NumericConverterRegistryTraits> top { PathStart };
   bool inMatchingGroup = false;
   Registry::Visit(std::tuple{
      [&](const NumericConverterRegistryGroup &group, auto&) {
         inMatchingGroup = group.GetType() == type; },
      [&](const NumericConverterRegistryItem &item, auto&) {
         if (!inMatchingGroup)
            return;
         // Skip the items that are not acceptable in this context
         if (!item.factory->IsAcceptableInContext(context))
            return;
         visitor(item);
      },
      [&](const NumericConverterRegistryGroup &, auto&) {
         inMatchingGroup = false; }
   }, &top, &Registry());
}
 
const NumericConverterRegistryItem* NumericConverterRegistry::Find(
   const FormatterContext& context, 
   const NumericConverterType& type, const NumericFormatID& symbol)
{
   const NumericConverterRegistryItem* result = nullptr;
 
   Visit(
      context,
      type,
      [&result, symbol](const NumericConverterRegistryItem& item)
      {
         if (item.symbol.Internal() == symbol)
            result = &item;
      });
 
   return result;
}
 
NumericConverterRegistryGroup::~NumericConverterRegistryGroup()
{
}