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/**********************************************************************
Audacity: A Digital Audio Editor
XMLMethodRegistry.cpp
Paul Licameli
**********************************************************************/
#include "XMLMethodRegistry.h"
#include "Identifier.h"
XMLMethodRegistryBase::XMLMethodRegistryBase() = default;
XMLMethodRegistryBase::~XMLMethodRegistryBase() = default;
void XMLMethodRegistryBase::Register(
std::string tag, TypeErasedObjectAccessor accessor )
{
// Store string in a separate container from the map, so the map
// can be keyed by string_view.
// Beware small-string optimization! Be sure strings don't relocate for
// growth of the container. Use a list, not a vector.
auto &newtag = mTags.emplace_front(move(tag));
mTagTable[ newtag ] = move( accessor );
}
XMLTagHandler *XMLMethodRegistryBase::CallObjectAccessor(
const std::string_view &tag, void *p )
{
const auto &table = mTagTable;
if (auto iter = table.find( tag ); iter != table.end())
if (auto &fn = iter->second)
return fn( p );
return nullptr;
}
void XMLMethodRegistryBase::PushAccessor( TypeErasedAccessor accessor )
{
mAccessors.emplace_back( move( accessor ) );
}
void XMLMethodRegistryBase::Register(
std::string tag, TypeErasedMutator mutator )
{
// Similar to the other overload of Register
auto &newtag = mMutatorTags.emplace_front(move(tag));
mMutatorTable[ newtag ] = { mAccessors.size() - 1, move( mutator ) };
}
bool XMLMethodRegistryBase::CallAttributeHandler( const std::string_view &tag,
void *p, const XMLAttributeValueView &value )
{
const auto &table = mMutatorTable;
if (auto iter = table.find(tag); iter != table.end())
// Tag is known
if (auto &pair = iter->second;
pair.second && pair.first < mAccessors.size() )
// Mutator is not null and accessor exists
if (auto &accessor = mAccessors[pair.first])
// Accessor is not null; compose accessor and mutator
return pair.second( accessor( p ), value ), true;
return false;
}
void XMLMethodRegistryBase::RegisterAttributeWriter( TypeErasedWriter writer )
{
mAttributeWriterTable.emplace_back( move( writer ) );
}
void XMLMethodRegistryBase::CallAttributeWriters(
const void *p, XMLWriter &writer )
{
const auto &table = mAttributeWriterTable;
for ( auto &fn : table )
if (fn)
fn( p, writer );
}
void XMLMethodRegistryBase::RegisterObjectWriter( TypeErasedWriter writer )
{
mObjectWriterTable.emplace_back( move( writer ) );
}
void XMLMethodRegistryBase::CallObjectWriters(
const void *p, XMLWriter &writer )
{
const auto &table = mObjectWriterTable;
for ( auto &fn : table )
if (fn)
fn( p, writer );
}
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