85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
/*
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Copyright (C) 2014 Paul Davis
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Author: David Robillard
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __ardour_item_counts_h__
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#define __ardour_item_counts_h__
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#include <cstddef>
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#include <map>
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#include <utility>
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#include "ardour/data_type.h"
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#include "evoral/Parameter.hpp"
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/** A count of various GUI items.
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*
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* This is used to keep track of 'consumption' of a selection when pasting, but
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* may be useful elsewhere.
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*/
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class ItemCounts
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{
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public:
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ItemCounts() : _notes(0) {}
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size_t n_playlists(ARDOUR::DataType t) const { return get_n(t, _playlists); }
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size_t n_regions(ARDOUR::DataType t) const { return get_n(t, _regions); }
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size_t n_lines(Evoral::Parameter t) const { return get_n(t, _lines); }
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size_t n_notes() const { return _notes; }
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void increase_n_playlists(ARDOUR::DataType t, size_t delta=1) {
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increase_n(t, _playlists, delta);
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}
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void increase_n_regions(ARDOUR::DataType t, size_t delta=1) {
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increase_n(t, _regions, delta);
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}
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void increase_n_lines(Evoral::Parameter t, size_t delta=1) {
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increase_n(t, _lines, delta);
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}
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void increase_n_notes(size_t delta=1) { _notes += delta; }
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private:
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template<typename Key>
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size_t
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get_n(const Key& key, const typename std::map<Key, size_t>& counts) const {
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typename std::map<Key, size_t>::const_iterator i = counts.find(key);
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return (i == counts.end()) ? 0 : i->second;
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}
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template<typename Key>
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void
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increase_n(const Key& key, typename std::map<Key, size_t>& counts, size_t delta) {
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typename std::map<Key, size_t>::iterator i = counts.find(key);
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if (i != counts.end()) {
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i->second += delta;
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} else {
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counts.insert(std::make_pair(key, delta));
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}
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}
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std::map<ARDOUR::DataType, size_t> _playlists;
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std::map<ARDOUR::DataType, size_t> _regions;
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std::map<Evoral::Parameter, size_t> _lines;
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size_t _notes;
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};
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#endif /* __ardour_item_counts_h__ */
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