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* improve performance of deselecting big selections

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This commit is contained in:
Garux 2021-03-20 02:29:48 +03:00
parent 812679236d
commit ebd90382a4
1 changed files with 28 additions and 15 deletions
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43
libs/selectionlib.h
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@ -118,18 +118,8 @@ typedef MemberCaller1<SelectableInstance, const Selectable&, &SelectableInstance
};
template<typename Iterator>
inline bool range_check( Iterator start, Iterator finish, Iterator iter ){
for (; start != finish; ++start )
{
if ( start == iter ) {
return true;
}
}
return false;
}
#include <list>
#include <set>
template<typename Selected>
class SelectionList
@ -139,6 +129,28 @@ List m_selection;
public:
typedef typename List::iterator iterator;
typedef typename List::const_iterator const_iterator;
private:
struct Compare{
using is_transparent = void;
bool operator()( const iterator& one, const iterator& other ) const {
return *one < *other;
}
bool operator()( const Selected* va, const iterator& it ) const {
return va < *it;
}
bool operator()( const iterator& it, const Selected* va ) const {
return *it < va;
}
};
std::multiset<iterator, Compare> m_set;
public:
SelectionList() = default;
SelectionList( const SelectionList& ) = delete;
SelectionList( SelectionList&& ) noexcept = delete;
SelectionList& operator=( const SelectionList& ) = delete;
SelectionList& operator=( SelectionList&& ) noexcept = delete;
iterator begin(){
return m_selection.begin();
@ -166,12 +178,13 @@ Selected& back() const {
}
void append( Selected& selected ){
m_selection.push_back( &selected );
m_set.emplace( --end() );
}
void erase( Selected& selected ){
typename List::reverse_iterator i = std::find( m_selection.rbegin(), m_selection.rend(), &selected );
ASSERT_MESSAGE( i != m_selection.rend(), "selection-tracking error" );
ASSERT_MESSAGE( range_check( m_selection.begin(), m_selection.end(), --i.base() ), "selection-tracking error" );
m_selection.erase( --i.base() );
auto it = m_set.find( &selected );
ASSERT_MESSAGE( it != m_set.end(), "selection-tracking error" );
m_selection.erase( *it );
m_set.erase( it );
}
};