def _mimeDataAlgorithm(items):
     item = items[0]
     mimeData = None
     if isinstance(item, TreeAlgorithmItem):
         mimeData = QMimeData()
         mimeData.setText(item.alg.id())
     return mimeData

    def mimeData(self, indexes):
        mimeData = QMimeData()
        encodedData = QByteArray()

        stream = QDataStream(encodedData, QIODevice.WriteOnly)

        for index in indexes:
            if not index.isValid():
                continue
            if not isinstance(index.internalPointer(), TableItem):
                continue
            table = self.getItem(index)
            stream.writeQString(table.mimeUri())

        mimeData.setData(self.QGIS_URI_MIME, encodedData)
        return mimeData

    def testCopyPaste(self):
        p = QgsProject()
        l = QgsLayout(p)

        # clear clipboard
        mime_data = QMimeData()
        mime_data.setData("text/xml", QByteArray())
        clipboard = QApplication.clipboard()
        clipboard.setMimeData(mime_data)

        # add an item
        item1 = QgsLayoutItemLabel(l)
        item1.setText('label 1')
        l.addLayoutItem(item1)
        item1.setSelected(True)
        item2 = QgsLayoutItemLabel(l)
        item2.setText('label 2')
        l.addLayoutItem(item2)
        item2.setSelected(True)

        view = QgsLayoutView()
        view.setCurrentLayout(l)
        self.assertFalse(view.hasItemsInClipboard())

        view.copySelectedItems(QgsLayoutView.ClipboardCopy)
        self.assertTrue(view.hasItemsInClipboard())

        pasted = view.pasteItems(QgsLayoutView.PasteModeCursor)
        self.assertEqual(len(pasted), 2)
        self.assertIn(pasted[0], l.items())
        self.assertIn(pasted[1], l.items())
        self.assertIn(sip.cast(pasted[0], QgsLayoutItemLabel).text(), ('label 1', 'label 2'))
        self.assertIn(sip.cast(pasted[1], QgsLayoutItemLabel).text(), ('label 1', 'label 2'))

        # copy specific item
        view.copyItems([item2], QgsLayoutView.ClipboardCopy)
        l2 = QgsLayout(p)
        view2 = QgsLayoutView()
        view2.setCurrentLayout(l2)
        pasted = view2.pasteItems(QgsLayoutView.PasteModeCursor)
        self.assertEqual(len(pasted), 1)
        self.assertIn(pasted[0], l2.items())
        self.assertEqual(sip.cast(pasted[0], QgsLayoutItemLabel).text(), 'label 2')

 def _mimeDataAlgorithm(items):
     item = items[0]
     if isinstance(item, TreeAlgorithmItem):
         mimeData = QMimeData()
         mimeData.setText(item.alg.commandLineName())
     return mimeData

 def _mimeDataInput(items):
     mimeData = QMimeData()
     text = items[0].text(0)
     mimeData.setText(text)
     return mimeData

 def _mimeDataInput(items):
     mimeData = QMimeData()
     text = items[0].data(0, Qt.UserRole)
     mimeData.setText(text)
     return mimeData