Copy & Paste

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#  Author: Dan Huckson, https://github.com/unodan
#    Date: 2020-03-12
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    def copy(self):
        def get_items(_node):
            def get_nodes(_nodex):
                _items = []
                for _nodex in self.get_children(_nodex):
                    _items.append(_nodex)
                    if self.get_children(_nodex):
                        _items += get_items(_nodex)
                return _items

            if self.item(node)['open']:
                results = [] if next((x for x in selections if x.startswith(_node)), False) else get_nodes(_node)
            else:
                results = get_nodes(_node)
            return results

        self.tags_remove_all('copy', 'selected')
        self.refresh_tags()

        items = []
        selections = sorted(list(self.selection()))
        while selections:
            node = selections.pop(0)
            items.append(node)

            if self.item(node)['values'][0] == 'Menu':
                items += get_items(node)

        for item in items:
            self.tags_add(item, ['copy', 'selected'])
            self.tags_remove(item, ['odd', 'even'])

        self.popup.enable_items(['paste'])
        self.pointer_x, self.pointer_y = self.winfo_toplevel().winfo_pointerxy()

    def paste(self):
        def set_items(parent, _node):
            for child in self.get_children(_node):
                if child in nodes:
                    nodes.pop(nodes.index(child))
                    data = self.get_data(child)
                    _iid = self.append(parent, data['type'], data['text'], data['values'])
                    set_items(_iid, child)

        for selection in self.selection():
            nodes = sorted(self.tag_has('copy'))

            while nodes:
                node = nodes.pop(0)
                item = self.item(node)

                iid = self.append(selection, item['values'][0], item['text'], item['values'])
                if item['values'][0] == 'Menu':
                    set_items(iid, node)

        self.tags_remove_all('selected')
        self.refresh_tags()