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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
import os
import logging
import tempfile
import gtk
from sugar import util
from sugar.graphics import tray
from sugar.graphics import style
from jarabe.frame import clipboard
from jarabe.frame.clipboardicon import ClipboardIcon
class _ContextMap(object):
"""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 ClipboardTray(tray.VTray):
MAX_ITEMS = gtk.gdk.screen_height() / style.GRID_CELL_SIZE - 2
def __init__(self):
tray.VTray.__init__(self, align=tray.ALIGN_TO_END)
self._icons = {}
self._context_map = _ContextMap()
cb_service = clipboard.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
logging.debug('ClipboardTray: adding type %r', selection.type)
cb_service = clipboard.get_instance()
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.')
cb_service.add_object_format(object_id,
selection.type,
uris[0],
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, cb_object):
if self._icons:
group = self._icons.values()[0]
else:
group = None
icon = ClipboardIcon(cb_object, group)
self.add_item(icon)
icon.show()
self._icons[cb_object.get_id()] = icon
objects_to_delete = self.get_children()[:-self.MAX_ITEMS]
for icon in objects_to_delete:
logging.debug('ClipboardTray: deleting surplus object')
cb_service = clipboard.get_instance()
cb_service.delete_object(icon.get_object_id())
logging.debug('ClipboardTray: %r was added', cb_object.get_id())
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
self.remove_item(icon)
del self._icons[object_id]
logging.debug('ClipboardTray: %r was deleted', object_id)
def drag_motion_cb(self, widget, context, x, y, time):
logging.debug('ClipboardTray._drag_motion_cb')
if self._internal_drag(context):
context.drag_status(gtk.gdk.ACTION_MOVE, time)
else:
context.drag_status(gtk.gdk.ACTION_COPY, time)
self.props.drag_active = True
return True
def drag_leave_cb(self, widget, context, time):
self.props.drag_active = False
def drag_drop_cb(self, widget, context, x, y, time):
logging.debug('ClipboardTray._drag_drop_cb')
if self._internal_drag(context):
# TODO: We should move the object within the clipboard here
if not self._context_map.has_context(context):
context.drop_finish(False, gtk.get_current_event_time())
return False
cb_service = clipboard.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):
logging.debug('ClipboardTray: got data for target %r',
selection.target)
object_id = self._context_map.get_object_id(context)
try:
if selection is None:
logging.warn('ClipboardTray: empty selection for target %s',
selection.target)
elif selection.target == 'XdndDirectSave0':
if selection.data == 'S':
window = context.source_window
prop_type, format_, dest = \
window.property_get('XdndDirectSave0', 'text/plain')
clipboardservice = clipboard.get_instance()
clipboardservice.add_object_format( \
object_id, 'XdndDirectSave0', dest, on_disk=True)
else:
self._add_selection(object_id, selection)
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())
def _internal_drag(self, context):
view_ancestor = context.get_source_widget().get_ancestor(gtk.Viewport)
if view_ancestor is self._viewport:
return True
else:
return False
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