291 lines
11 KiB
Python
291 lines
11 KiB
Python
# Copyright (C) 2007, One Laptop Per Child
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import shutil
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import os
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import logging
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import urlparse
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import hippo
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import gtk
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from sugar import util
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from sugar.objects import mime
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from view.clipboardicon import ClipboardIcon
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from sugar.clipboard import clipboardservice
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class _ContextMap:
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"""Maps a drag context to the clipboard object involved in the dragging."""
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def __init__(self):
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self._context_map = {}
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def add_context(self, context, object_id, data_types):
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"""Establishes the mapping. data_types will serve us for reference-
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counting this mapping.
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"""
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self._context_map[context] = [object_id, data_types]
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def get_object_id(self, context):
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"""Retrieves the object_id associated with context.
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Will release the association when this function was called as many times
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as the number of data_types that this clipboard object contains.
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"""
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[object_id, data_types_left] = self._context_map[context]
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data_types_left = data_types_left - 1
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if data_types_left == 0:
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del self._context_map[context]
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else:
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self._context_map[context] = [object_id, data_types_left]
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return object_id
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def has_context(self, context):
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return context in self._context_map
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class ClipboardBox(hippo.CanvasBox):
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def __init__(self):
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hippo.CanvasBox.__init__(self)
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self._icons = {}
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self._context_map = _ContextMap()
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self._selected_icon = None
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self._owns_clipboard = False
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self._pressed_button = None
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self._press_start_x = None
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self._press_start_y = None
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cb_service = clipboardservice.get_instance()
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cb_service.connect('object-added', self._object_added_cb)
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cb_service.connect('object-deleted', self._object_deleted_cb)
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cb_service.connect('object-state-changed', self._object_state_changed_cb)
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def owns_clipboard(self):
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return self._owns_clipboard
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def _get_icon_at_coords(self, x, y):
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box_x, box_y = self.get_context().get_position(self)
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x -= box_x
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y -= box_y
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for object_id, icon in self._icons.iteritems():
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icon_x, icon_y = self.get_position(icon)
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icon_width, icon_height = icon.get_allocation()
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if (x >= icon_x ) and (x <= icon_x + icon_width) and \
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(y >= icon_y ) and (y <= icon_y + icon_height):
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return icon
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return None
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def _add_selection(self, object_id, selection):
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if not selection.data:
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return
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logging.debug('ClipboardBox: adding type ' + selection.type + ' ' + selection.data)
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cb_service = clipboardservice.get_instance()
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if selection.type == 'text/uri-list':
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uris = selection.data.split('\n')
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if len(uris) > 1:
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raise NotImplementedError('Multiple uris in text/uri-list still not supported.')
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uri = urlparse.urlparse(uris[0])
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path, file_name = os.path.split(uri.path)
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root, ext = os.path.splitext(file_name)
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if not ext or ext == '.':
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mime_type = mime.get_for_file(uri.path)
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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.
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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,
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selection.type,
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"file://" + new_file_path,
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on_disk=True)
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else:
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cb_service.add_object_format(object_id,
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selection.type,
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selection.data,
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on_disk=False)
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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('activated', self._icon_activated_cb)
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self._set_icon_selected(icon)
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self.prepend(icon)
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self._icons[object_id] = icon
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logging.debug('ClipboardBox: ' + object_id + ' was added.')
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def _set_icon_selected(self, icon):
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logging.debug('_set_icon_selected')
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icon.props.selected = True
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if self._selected_icon:
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self._selected_icon.props.selected = False
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self._selected_icon = icon
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def _put_in_clipboard(self, object_id):
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logging.debug('ClipboardBox._put_in_clipboard')
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targets = self._get_object_targets(object_id)
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if targets:
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clipboard = gtk.Clipboard()
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if not clipboard.set_with_data(targets,
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self._clipboard_data_get_cb,
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self._clipboard_clear_cb):
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logging.error('GtkClipboard.set_with_data failed!')
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else:
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self._owns_clipboard = True
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def _clipboard_data_get_cb(self, clipboard, selection, info, data):
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object_id = self._selected_icon.get_object_id()
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cb_service = clipboardservice.get_instance()
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data = cb_service.get_object_data(object_id, selection.target)['DATA']
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selection.set(selection.target, 8, data)
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def _clipboard_clear_cb(self, clipboard, data):
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logging.debug('ClipboardBox._clipboard_clear_cb')
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self._owns_clipboard = False
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def _icon_activated_cb(self, icon):
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logging.debug('ClipboardBox._icon_activated_cb')
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if not icon.props.selected:
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self._set_icon_selected(icon)
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def _object_deleted_cb(self, cb_service, object_id):
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icon = self._icons[object_id]
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position = self.get_children().index(icon)
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self.remove(icon)
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if icon.props.selected and self.get_children():
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self._set_icon_selected(self.get_children()[position])
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del self._icons[object_id]
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logging.debug('ClipboardBox: ' + object_id + ' was deleted.')
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def _object_state_changed_cb(self, cb_service, object_id, name, percent,
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icon_name, preview, activity):
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icon = self._icons[object_id]
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icon.set_state(name, percent, icon_name, preview, activity)
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if icon.props.selected and percent == 100:
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self._put_in_clipboard(object_id)
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def drag_motion_cb(self, widget, context, x, y, time):
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logging.debug('ClipboardBox._drag_motion_cb')
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context.drag_status(gtk.gdk.ACTION_COPY, time)
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return True;
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def drag_drop_cb(self, widget, context, x, y, time):
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logging.debug('ClipboardBox._drag_drop_cb')
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cb_service = clipboardservice.get_instance()
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object_id = cb_service.add_object(name="")
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self._context_map.add_context(context, object_id, len(context.targets))
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for target in context.targets:
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if str(target) not in ('TIMESTAMP', 'TARGETS', 'MULTIPLE'):
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widget.drag_get_data(context, target, time)
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cb_service.set_object_percent(object_id, percent=100)
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return True
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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:
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if selection:
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object_id = self._context_map.get_object_id(context)
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self._add_selection(object_id, selection)
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else:
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logging.warn('ClipboardBox: empty selection for target ' + selection.target)
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finally:
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# If it's the last target to be processed, finish the dnd transaction
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if not self._context_map.has_context(context):
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context.drop_finish(True, gtk.get_current_event_time())
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def drag_data_get_cb(self, widget, context, selection, targetType, eventTime):
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logging.debug("drag_data_get_cb: requested target " + selection.target)
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object_id = self._last_clicked_icon.get_object_id()
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cb_service = clipboardservice.get_instance()
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data = cb_service.get_object_data(object_id, selection.target)['DATA']
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selection.set(selection.target, 8, data)
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def button_press_event_cb(self, widget, event):
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logging.debug("button_press_event_cb")
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if event.button == 1 and event.type == gtk.gdk.BUTTON_PRESS:
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self._last_clicked_icon = self._get_icon_at_coords(event.x, event.y)
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if self._last_clicked_icon:
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self._pressed_button = event.button
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self._press_start_x = event.x
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self._press_start_y = event.y
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return True;
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def motion_notify_event_cb(self, widget, event):
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if not self._pressed_button:
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return True
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# if the mouse button is not pressed, no drag should occurr
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if not event.state & gtk.gdk.BUTTON1_MASK:
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self._pressed_button = None
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return True
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logging.debug("motion_notify_event_cb")
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if event.is_hint:
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x, y, state = event.window.get_pointer()
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else:
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x = event.x
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y = event.y
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state = event.state
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if widget.drag_check_threshold(int(self._press_start_x),
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int(self._press_start_y),
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int(x),
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int(y)):
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targets = self._get_object_targets(
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self._last_clicked_icon.get_object_id())
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context = widget.drag_begin(targets,
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gtk.gdk.ACTION_COPY,
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1,
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event);
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return True
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def drag_end_cb(self, widget, drag_context):
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logging.debug("drag_end_cb")
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self._pressed_button = None
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def _get_object_targets(self, object_id):
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cb_service = clipboardservice.get_instance()
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attrs = cb_service.get_object(object_id)
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format_types = attrs[clipboardservice.FORMATS_KEY]
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targets = []
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for format_type in format_types:
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targets.append((format_type, 0, 0))
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return targets
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