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 shutil
import os
import logging
import urlparse
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import hippo
import gtk
from sugar import util
from sugar.objects import mime
from view.clipboardicon import ClipboardIcon
from sugar.clipboard import clipboardservice
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._owns_clipboard = False
self._pressed_button = None
self._press_start_x = None
self._press_start_y = None
cb_service = clipboardservice.get_instance()
cb_service.connect('object-added', self._object_added_cb)
cb_service.connect('object-deleted', self._object_deleted_cb)
cb_service.connect('object-state-changed', self._object_state_changed_cb)
def owns_clipboard(self):
return self._owns_clipboard
def _get_icon_at_coords(self, x, y):
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box_x, box_y = self.get_context().get_position(self)
x -= box_x
y -= box_y
for object_id, icon in self._icons.iteritems():
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icon_x, icon_y = self.get_position(icon)
icon_width, icon_height = icon.get_allocation()
if (x >= icon_x ) and (x <= icon_x + icon_width) and \
(y >= icon_y ) and (y <= icon_y + icon_height):
return icon
return None
def _add_selection(self, object_id, selection):
if not selection.data:
return
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logging.debug('ClipboardBox: adding type ' + selection.type + ' ' + selection.data)
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.')
uri = urlparse.urlparse(uris[0])
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path, file_name = os.path.split(uri.path)
root, ext = os.path.splitext(file_name)
if not ext or ext == '.':
mime_type = mime.get_for_file(uri.path)
file_name = root + '.' + mime.get_primary_extension(mime_type)
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# Copy the file, as it will be deleted when the dnd operation finishes.
new_file_path = os.path.join(path, 'cb' + file_name)
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shutil.copyfile(uri.path, new_file_path)
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cb_service.add_object_format(object_id,
selection.type,
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"file://" + new_file_path,
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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):
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icon = ClipboardIcon(object_id, name)
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icon.connect('button-release-event', self._icon_button_release_event_cb)
self._set_icon_selected(icon)
self.prepend(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.selected = True
if self._selected_icon:
self._selected_icon.props.selected = False
self._selected_icon = icon
def _put_in_clipboard(self, object_id):
logging.debug('ClipboardBox._put_in_clipboard')
targets = self._get_object_targets(object_id)
if targets:
clipboard = gtk.Clipboard()
if not clipboard.set_with_data(targets,
self._clipboard_data_get_cb,
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self._clipboard_clear_cb,
targets):
logging.error('GtkClipboard.set_with_data failed!')
else:
self._owns_clipboard = True
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def _clipboard_data_get_cb(self, clipboard, selection, info, targets):
if not selection.target in [target[0] for target in targets]:
logging.warning('ClipboardBox._clipboard_data_get_cb: asked %s but' \
' only have %r.' % (selection.target, targets))
return
object_id = self._selected_icon.get_object_id()
cb_service = clipboardservice.get_instance()
data = cb_service.get_object_data(object_id, selection.target)['DATA']
selection.set(selection.target, 8, data)
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def _clipboard_clear_cb(self, clipboard, targets):
logging.debug('ClipboardBox._clipboard_clear_cb')
self._owns_clipboard = False
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def _icon_button_release_event_cb(self, icon, event):
logging.debug('ClipboardBox._icon_button_release_event_cb: %r' % icon.props.selected)
if not icon.props.selected:
self._set_icon_selected(icon)
def _object_deleted_cb(self, cb_service, object_id):
icon = self._icons[object_id]
position = self.get_children().index(icon)
self.remove(icon)
if icon.props.selected and self.get_children():
self._set_icon_selected(self.get_children()[position])
del self._icons[object_id]
logging.debug('ClipboardBox: ' + object_id + ' was deleted.')
def _object_state_changed_cb(self, cb_service, object_id, name, percent,
icon_name, preview, activity):
icon = self._icons[object_id]
icon.set_state(name, percent, icon_name, preview, activity)
if icon.props.selected and percent == 100:
self._put_in_clipboard(object_id)
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())
def drag_data_get_cb(self, widget, context, selection, targetType, eventTime):
logging.debug("drag_data_get_cb: requested target " + selection.target)
object_id = self._last_clicked_icon.get_object_id()
cb_service = clipboardservice.get_instance()
data = cb_service.get_object_data(object_id, selection.target)['DATA']
selection.set(selection.target, 8, data)
def button_press_event_cb(self, widget, event):
logging.debug("button_press_event_cb")
if event.button == 1 and event.type == gtk.gdk.BUTTON_PRESS:
self._last_clicked_icon = self._get_icon_at_coords(event.x, event.y)
if self._last_clicked_icon:
self._pressed_button = event.button
self._press_start_x = event.x
self._press_start_y = event.y
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return False
def motion_notify_event_cb(self, widget, event):
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if not self._pressed_button:
return True
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# if the mouse button is not pressed, no drag should occurr
if not event.state & gtk.gdk.BUTTON1_MASK:
self._pressed_button = None
return True
logging.debug("motion_notify_event_cb")
if event.is_hint:
x, y, state = event.window.get_pointer()
else:
x = event.x
y = event.y
state = event.state
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if widget.drag_check_threshold(int(self._press_start_x),
int(self._press_start_y),
int(x),
int(y)):
targets = self._get_object_targets(
self._last_clicked_icon.get_object_id())
context = widget.drag_begin(targets,
gtk.gdk.ACTION_COPY,
1,
event);
return True
def drag_end_cb(self, widget, drag_context):
logging.debug("drag_end_cb")
self._pressed_button = None
def _get_object_targets(self, object_id):
cb_service = clipboardservice.get_instance()
attrs = cb_service.get_object(object_id)
format_types = attrs[clipboardservice.FORMATS_KEY]
targets = []
for format_type in format_types:
targets.append((format_type, 0, 0))
return targets