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#!/usr/bin/env python
#
# Author: Sascha Silbe <sascha-pgp@silbe.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3
# as published by the Free Software Foundation.
#
# 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
"""Janitor. Activity to perform housekeeping tasks on the Sugar Journal.
"""
from gettext import gettext as _
import logging
import os
import gobject
import gtk
import pango
from sugar.activity.widgets import ActivityToolbarButton
from sugar.activity.widgets import StopButton
from sugar.activity import activity
from sugar.datastore import datastore
import sugar.env
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.toolbarbox import ToolbarBox
from sugar.graphics.toolbarbox import ToolbarButton
import sugar.logger
def _get_text_width(text):
"""Determine width (in pixels) of given text using default font.
"""
# XXX: is there really no easier way to achieve this?
label = gtk.Label()
font_layout = label.create_pango_layout(text)
font_name = gtk.settings_get_default().props.gtk_font_name
font_desc = pango.FontDescription(font_name)
font_layout.set_font_description(font_desc)
width, height = font_layout.get_pixel_size()
return width
def format_size(size):
if not size:
return _('Empty')
elif size < 1024:
return _('%4d B') % size
elif size < 1024**2:
return _('%4d KB') % (size / 1024)
elif size < 1024**3:
return _('%4d MB') % (size / 1024**2)
else:
return _('%4d GB') % (size / 1024**3)
class JanitorActivity(activity.Activity):
_store_columns = [
gobject.TYPE_BOOLEAN,
gobject.TYPE_STRING,
gobject.TYPE_UINT64,
gobject.TYPE_FLOAT,
gobject.TYPE_STRING,
]
NUM_COLUMNS = len(_store_columns)
COLUMN_SELECT, COLUMN_TITLE, COLUMN_SIZE_INT, COLUMN_SIZE_PERCENT, \
COLUMN_SIZE_TEXT = range(NUM_COLUMNS)
_view_columns = [
{'name': 'Select',
'renderer': gtk.CellRendererToggle,
'view_args': {'active': COLUMN_SELECT},
'callback': lambda cell, path, self: self._select_toggled(cell, path),
},
{'name': 'Title',
'renderer': gtk.CellRendererText, 'ellipsize': True,
'view_args': {'text': COLUMN_TITLE},
'sort_column': COLUMN_TITLE,
},
{'name': 'Size', 'size': max(_get_text_width('XX 9999.9 GB XX'),
_get_text_width(format_size(0)),),
'renderer': gtk.CellRendererProgress,
'view_args': {'value': COLUMN_SIZE_PERCENT, 'text': COLUMN_SIZE_TEXT},
'sort_column': COLUMN_SIZE_INT,
},
]
_properties = [
'uid', 'tree_id', 'version_id', 'title', 'timestamp',
]
def __init__(self, handle):
activity.Activity.__init__(self, handle)
self.max_participants = 1
self._largest_size = 0
self._setup_widgets()
def _setup_widgets(self):
self._setup_toolbar()
self._setup_canvas()
def _setup_canvas(self):
vbox = gtk.VBox()
scrolled_window = gtk.ScrolledWindow()
scrolled_window.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
self._create_list_model()
self._list_view = gtk.TreeView(self._list_model)
self._list_view.set_rules_hint(True)
scrolled_window.add(self._list_view)
self._setup_list_view_columns()
sort_column_idx = [idx for idx, column in enumerate(self._view_columns)
if column['name'] == 'Size'][0]
self._list_model.set_sort_column_id(sort_column_idx, gtk.SORT_DESCENDING)
self._list_view.show()
scrolled_window.show()
vbox.add(scrolled_window)
self.set_canvas(vbox)
vbox.show()
def _setup_toolbar(self):
toolbar_box = ToolbarBox()
activity_button = ActivityToolbarButton(self)
toolbar_box.toolbar.insert(activity_button, 0)
activity_button.show()
separator = gtk.SeparatorToolItem()
separator.props.draw = False
separator.set_expand(True)
toolbar_box.toolbar.insert(separator, -1)
separator.show()
stop_button = StopButton(self)
toolbar_box.toolbar.insert(stop_button, -1)
stop_button.show()
self.set_toolbar_box(toolbar_box)
toolbar_box.show()
def _setup_list_view_columns(self):
for idx, column in enumerate(self._view_columns):
renderer = column['renderer']()
if column.get('ellipsize'):
renderer.props.ellipsize = pango.ELLIPSIZE_MIDDLE
renderer.props.ellipsize_set = True
if 'callback' in column:
if isinstance(renderer, gtk.CellRendererToggle):
signal_name = 'toggled'
else:
raise ValueError('Unknown renderer')
renderer.connect(signal_name, column['callback'], self)
view_column = gtk.TreeViewColumn(_(column['name']), renderer,
**column['view_args'])
if isinstance(renderer, gtk.CellRendererText):
view_column.props.expand = True
if 'sort_column' in column:
view_column.set_sort_column_id(column['sort_column'])
if 'size' in column:
view_column.props.sizing = gtk.TREE_VIEW_COLUMN_FIXED
view_column.props.fixed_width = column['size']
self._list_view.append_column(view_column)
def _create_list_model(self):
self._list_model = gtk.ListStore(*[
column_type for column_type in self._store_columns])
self._refresh_list()
def _refresh_list(self):
self._list_model.clear()
# FIXME: async
# FIXME: listen for DBus signals
jobjects = datastore.find({}, properties=self._properties)[0]
entries = []
for jobject in jobjects:
metadata = jobject.metadata
size = self._get_size(jobject)
# TODO: handle broken (non-UTF8) metadata
entries.append({
'size': size,
'title': metadata.get('title', ''),
})
jobject.destroy()
del jobjects
largest_size = reduce(max, [entry['size'] for entry in entries])
for entry in entries:
giter = self._list_model.append()
percent = float(entry['size']) / largest_size * 100
self._list_model.set(giter,
self.COLUMN_TITLE, entry['title'],
self.COLUMN_SIZE_INT, entry['size'],
self.COLUMN_SIZE_PERCENT, percent,
self.COLUMN_SIZE_TEXT, format_size(entry['size']))
def _get_size(self, jobject):
"""Return the file size for a Journal object."""
logging.debug('get_file_size %r', jobject.object_id)
path = jobject.get_file_path()
if not path:
return 0
return os.stat(path).st_size
def _select_toggled(self, cell, path):
"""Called when a 'Select' cell is toggled."""
giter = self._list_model.get_iter((int(path), ))
selected = self._list_model.get_value(giter, self.COLUMN_SELECT)
self._list_model.set(giter, self.COLUMN_SELECT, not selected)
sugar.logger.start()
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