sugar-toolkit-gtk3/shell/view/frame/clipboardbox.py

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# Copyright (C) 2007, One Laptop Per Child
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import os
import logging
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import hippo
import gtk
from sugar import util
from sugar.clipboard import clipboardservice
from sugar.graphics.tray import VTray
from view.clipboardicon import ClipboardIcon
class _ContextMap:
"""Maps a drag context to the clipboard object involved in the dragging."""
def __init__(self):
self._context_map = {}
def add_context(self, context, object_id, data_types):
"""Establishes the mapping. data_types will serve us for reference-
counting this mapping.
"""
self._context_map[context] = [object_id, data_types]
def get_object_id(self, context):
"""Retrieves the object_id associated with context.
Will release the association when this function was called as many times
as the number of data_types that this clipboard object contains.
"""
[object_id, data_types_left] = self._context_map[context]
data_types_left = data_types_left - 1
if data_types_left == 0:
del self._context_map[context]
else:
self._context_map[context] = [object_id, data_types_left]
return object_id
def has_context(self, context):
return context in self._context_map
class ClipboardBox(hippo.CanvasBox):
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def __init__(self):
hippo.CanvasBox.__init__(self)
self._icons = {}
self._context_map = _ContextMap()
self._selected_icon = None
self._tray = VTray()
self.append(hippo.CanvasWidget(widget=self._tray), hippo.PACK_EXPAND)
self._tray.show()
cb_service = clipboardservice.get_instance()
cb_service.connect('object-added', self._object_added_cb)
cb_service.connect('object-deleted', self._object_deleted_cb)
def owns_clipboard(self):
for icon in self._icons.values():
if icon.owns_clipboard:
return True
return False
def _add_selection(self, object_id, selection):
if not selection.data:
return
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logging.debug('ClipboardBox: adding type ' + selection.type)
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cb_service = clipboardservice.get_instance()
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if selection.type == 'text/uri-list':
uris = selection.data.split('\n')
if len(uris) > 1:
raise NotImplementedError('Multiple uris in text/uri-list still not supported.')
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cb_service.add_object_format(object_id,
selection.type,
uris[0],
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on_disk=True)
else:
cb_service.add_object_format(object_id,
selection.type,
selection.data,
on_disk=False)
def _object_added_cb(self, cb_service, object_id, name):
if self._icons:
group = self._icons.values()[0]
else:
group = None
icon = ClipboardIcon(object_id, name, group)
self._tray.add_item(icon, 0)
icon.show()
self._set_icon_selected(icon)
self._icons[object_id] = icon
logging.debug('ClipboardBox: ' + object_id + ' was added.')
def _set_icon_selected(self, icon):
logging.debug('_set_icon_selected')
icon.props.active = True
self._selected_icon = icon
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
position = self.get_children().index(icon)
self.remove(icon)
del self._icons[object_id]
logging.debug('ClipboardBox: ' + object_id + ' was deleted.')
def drag_motion_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_motion_cb')
context.drag_status(gtk.gdk.ACTION_COPY, time)
return True;
def drag_drop_cb(self, widget, context, x, y, time):
logging.debug('ClipboardBox._drag_drop_cb')
cb_service = clipboardservice.get_instance()
object_id = cb_service.add_object(name="")
self._context_map.add_context(context, object_id, len(context.targets))
for target in context.targets:
if str(target) not in ('TIMESTAMP', 'TARGETS', 'MULTIPLE'):
widget.drag_get_data(context, target, time)
cb_service.set_object_percent(object_id, percent=100)
return True
def drag_data_received_cb(self, widget, context, x, y, selection, targetType, time):
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logging.debug('ClipboardBox: got data for target %r' % selection.target)
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try:
if selection:
object_id = self._context_map.get_object_id(context)
self._add_selection(object_id, selection)
else:
logging.warn('ClipboardBox: empty selection for target ' + selection.target)
finally:
# If it's the last target to be processed, finish the dnd transaction
if not self._context_map.has_context(context):
context.drop_finish(True, gtk.get_current_event_time())