Function ClonePatterns

Source/FrameAction.cpp:48–65

};

void ClonePatterns(const CFrameSelection &Sel, CSongView &view) {		// // //
	std::unordered_map<std::pair<int, int>, int, pairhash> NewPatterns;

	CSongData &song = view.GetSong();

	for (auto [b, e] = CFrameIterator::FromSelection(Sel, view); b != e; ++b) {
		for (int c = b.m_iChannel; c < e.m_iChannel; ++c) {
			int OldPattern = b.Get(c);
			auto Index = std::make_pair(c, OldPattern);
			stChannelID ch = view.GetChannelOrder().TranslateChannel(c);
			if (auto p = NewPatterns.find(Index); p == NewPatterns.end()) {		// // // share common patterns
				NewPatterns[Index] = song.GetFreePatternIndex(ch);
				song.GetPattern(ch, NewPatterns[Index]) = song.GetPattern(ch, OldPattern);
			}
			b.Set(c, NewPatterns[Index]);
		}
	}
}

} // namespace