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
import tempfile
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import hippo
import gtk
from sugar import util
from sugar.clipboard import clipboardservice
from sugar.graphics.tray import VTray
from sugar.graphics import style
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):
MAX_ITEMS = gtk.gdk.screen_height() / style.GRID_CELL_SIZE - 2
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def __init__(self):
hippo.CanvasBox.__init__(self)
self._icons = {}
self._context_map = _ContextMap()
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._icons[object_id] = icon
objects_to_delete = self._tray.get_children()[ClipboardBox.MAX_ITEMS:]
for icon in objects_to_delete:
logging.debug('ClipboardBox: deleting surplus object')
cb_service = clipboardservice.get_instance()
cb_service.delete_object(icon.get_object_id())
logging.debug('ClipboardBox: ' + object_id + ' was added.')
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
self._tray.remove_item(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))
if 'XdndDirectSave0' in context.targets:
window = context.source_window
prop_type, format, filename = \
window.property_get('XdndDirectSave0','text/plain')
# FIXME query the clipboard service for a filename?
base_dir = tempfile.gettempdir()
dest_filename = util.unique_id()
name, dot, extension = filename.rpartition('.')
dest_filename += dot + extension
dest_uri = 'file://' + os.path.join(base_dir, dest_filename)
window.property_change('XdndDirectSave0', prop_type, format,
gtk.gdk.PROP_MODE_REPLACE, dest_uri)
widget.drag_get_data(context, 'XdndDirectSave0', time)
else:
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)
object_id = self._context_map.get_object_id(context)
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try:
if selection is None:
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logging.warn('ClipboardBox: empty selection for target ' + selection.target)
elif selection.target == 'XdndDirectSave0':
if selection.data == 'S':
window = context.source_window
prop_type, format, dest = \
window.property_get('XdndDirectSave0','text/plain')
clipboard = clipboardservice.get_instance()
clipboard.add_object_format(
object_id, 'XdndDirectSave0', dest, on_disk=True)
else:
self._add_selection(object_id, selection)
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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())