Initial release

deps_src/libnest2d/include/libnest2d/selections/selection_boilerplate.hpp

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+#ifndef SELECTION_BOILERPLATE_HPP
+#define SELECTION_BOILERPLATE_HPP
+
+#include <atomic>
+#include <libnest2d/nester.hpp>
+
+namespace libnest2d { namespace selections {
+
+template<class RawShape>
+class SelectionBoilerplate {
+public:
+    using ShapeType = RawShape;
+    using Item = _Item<RawShape>;
+    using ItemGroup = _ItemGroup<RawShape>;
+    using PackGroup = _PackGroup<RawShape>;
+
+    inline const PackGroup& getResult() const {
+        return packed_bins_;
+    }
+
+    inline int lastPackedBinId() const { return last_packed_bin_id_; }
+
+    inline void progressIndicator(ProgressFunction fn) { progress_ = fn; }
+
+    inline void stopCondition(StopCondition cond) { stopcond_ = cond; }
+
+    inline void unfitIndicator(UnfitIndicator fn) { unfitindicator_ = fn; }
+
+    inline void clear() { packed_bins_.clear(); }
+
+protected:
+
+    template<class Placer, class Container, class Bin, class PCfg>
+    void remove_unpackable_items(Container &c, const Bin &bin, const PCfg& pcfg)
+    {
+        // Safety test: try to pack each item into an empty bin. If it fails
+        // then it should be removed from the list
+        Placer p{ bin };
+        p.configure(pcfg);
+        p.preload(pcfg.m_excluded_items);
+        auto it = c.begin();
+        while (it != c.end() && !stopcond_()) {
+
+            // WARNING: The copy of itm needs to be created before Placer.
+            // Placer is working with references and its destructor still
+            // manipulates the item this is why the order of stack creation
+            // matters here.
+            const Item& itm = *it;
+            Item cpy{itm};
+
+            auto result = p.pack(cpy);
+            if (itm.area() <= 0 || !result) {
+                static_cast<Item&>(*it).binId(BIN_ID_UNFIT);
+            }
+            it++;
+        }
+    }
+
+    PackGroup packed_bins_;
+    ProgressFunction progress_ = [](unsigned){};
+    StopCondition stopcond_ = []() { return false; };
+    UnfitIndicator unfitindicator_;
+    int last_packed_bin_id_ = -1;
+};
+
+}
+}
+
+#endif // SELECTION_BOILERPLATE_HPP