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# (C) Copyright 2005-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
#
# Author: Evan Patterson
# Date: 06/26/09
# ------------------------------------------------------------------------------
from io import BytesIO
from pickle import dumps, load, loads
from pyface.qt import QtCore, QtGui
from traits.api import provides
from pyface.i_clipboard import IClipboard, BaseClipboard
# Shortcuts
cb = QtGui.QApplication.clipboard()
# Custom MIME type representing python objects
PYTHON_TYPE = "python/object"
@provides(IClipboard)
class Clipboard(BaseClipboard):
# ---------------------------------------------------------------------------
# 'data' property methods:
# ---------------------------------------------------------------------------
def _get_has_data(self):
return self.has_object_data or self.has_text_data or self.has_file_data
# ---------------------------------------------------------------------------
# 'object_data' property methods:
# ---------------------------------------------------------------------------
def _get_object_data(self):
obj = None
mime_data = cb.mimeData()
if mime_data.hasFormat(PYTHON_TYPE):
serialized_data = BytesIO(mime_data.data(PYTHON_TYPE).data())
# Loading the serialized data the first time returns the klass
_ = load(serialized_data)
# Loading it a second time returns the actual object
obj = load(serialized_data)
return obj
def _set_object_data(self, data):
mime_data = QtCore.QMimeData()
serialized_data = dumps(data.__class__) + dumps(data)
mime_data.setData(PYTHON_TYPE, QtCore.QByteArray(serialized_data))
cb.setMimeData(mime_data)
def _get_has_object_data(self):
return cb.mimeData().hasFormat(PYTHON_TYPE)
def _get_object_type(self):
result = ""
mime_data = cb.mimeData()
if mime_data.hasFormat(PYTHON_TYPE):
try:
# We may not be able to load the required class:
result = loads(mime_data.data(PYTHON_TYPE).data())
except:
pass
return result
# ---------------------------------------------------------------------------
# 'text_data' property methods:
# ---------------------------------------------------------------------------
def _get_text_data(self):
return cb.text()
def _set_text_data(self, data):
cb.setText(data)
def _get_has_text_data(self):
return cb.mimeData().hasText()
# ---------------------------------------------------------------------------
# 'file_data' property methods:
# ---------------------------------------------------------------------------
def _get_file_data(self):
mime_data = cb.mimeData()
if mime_data.hasUrls():
return [url.toString() for url in mime_data.urls()]
else:
return []
def _set_file_data(self, data):
if isinstance(data, str):
data = [data]
mime_data = QtCore.QMimeData()
mime_data.setUrls([QtCore.QUrl(path) for path in data])
cb.setMimeData(mime_data)
def _get_has_file_data(self):
return cb.mimeData().hasUrls()
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