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#------------------------------------------------------------------------------
# Copyright (c) 2009, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/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!
#------------------------------------------------------------------------------
# Standard library imports
from six.moves import cStringIO as StringIO
from six.moves.cPickle import dumps, load, loads
# System library imports
import wx
# ETS imports
from traits.api import provides
from pyface.i_clipboard import IClipboard, BaseClipboard
import six
# Data formats
PythonObjectFormat = wx.CustomDataFormat('PythonObject')
TextFormat = wx.DataFormat(wx.DF_TEXT)
FileFormat = wx.DataFormat(wx.DF_FILENAME)
# Shortcuts
cb = wx.TheClipboard
@provides(IClipboard)
class Clipboard(BaseClipboard):
#---------------------------------------------------------------------------
# 'data' property methods:
#---------------------------------------------------------------------------
def _get_has_data(self):
result = False
if cb.Open():
result = (cb.IsSupported(TextFormat) or
cb.IsSupported(FileFormat) or
cb.IsSupported(PythonObjectFormat))
cb.Close()
return result
#---------------------------------------------------------------------------
# 'object_data' property methods:
#---------------------------------------------------------------------------
def _get_object_data(self):
result = None
if cb.Open():
try:
if cb.IsSupported(PythonObjectFormat):
cdo = wx.CustomDataObject(PythonObjectFormat)
if cb.GetData(cdo):
file = StringIO(cdo.GetData())
klass = load(file)
result = load(file)
finally:
cb.Close()
return result
def _set_object_data(self, data):
if cb.Open():
try:
cdo = wx.CustomDataObject(PythonObjectFormat)
cdo.SetData(dumps(data.__class__) + dumps(data))
# fixme: There seem to be cases where the '-1' value creates
# pickles that can't be unpickled (e.g. some TraitDictObject's)
#cdo.SetData(dumps(data, -1))
cb.SetData(cdo)
finally:
cb.Close()
cb.Flush()
def _get_has_object_data(self):
return self._has_this_data(PythonObjectFormat)
def _get_object_type(self):
result = ''
if cb.Open():
try:
if cb.IsSupported(PythonObjectFormat):
cdo = wx.CustomDataObject(PythonObjectFormat)
if cb.GetData(cdo):
try:
# We may not be able to load the required class:
result = loads(cdo.GetData())
except:
pass
finally:
cb.Close()
return result
#---------------------------------------------------------------------------
# 'text_data' property methods:
#---------------------------------------------------------------------------
def _get_text_data(self):
result = ''
if cb.Open():
if cb.IsSupported(TextFormat):
tdo = wx.TextDataObject()
if cb.GetData(tdo):
result = tdo.GetText()
cb.Close()
return result
def _set_text_data(self, data):
if cb.Open():
cb.SetData(wx.TextDataObject(str(data)))
cb.Close()
cb.Flush()
def _get_has_text_data(self):
return self._has_this_data(TextFormat)
#---------------------------------------------------------------------------
# 'file_data' property methods:
#---------------------------------------------------------------------------
def _get_file_data(self):
result = []
if cb.Open():
if cb.IsSupported(FileFormat):
tfo = wx.FileDataObject()
if cb.GetData(tfo):
result = tfo.GetFilenames()
cb.Close()
return result
def _set_file_data(self, data):
if cb.Open():
tfo = wx.FileDataObject()
if isinstance(data, six.string_types):
tfo.AddFile(data)
else:
for filename in data:
tfo.AddFile(filename)
cb.SetData(tfo)
cb.Close()
cb.Flush()
def _get_has_file_data(self):
return self._has_this_data(FileFormat)
#---------------------------------------------------------------------------
# Private helper methods:
#---------------------------------------------------------------------------
def _has_this_data(self, format):
result = False
if cb.Open():
result = cb.IsSupported(format)
cb.Close()
return result
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