misc.py

   1 # Copyright (C) 2007, One Laptop Per Child
   2 #
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16
  17 import logging
  18 import time
  19 import traceback
  20 import sys
  21 import os
  22 from gettext import gettext as _
  23
  24 import gtk
  25
  26 from sugar import activity
  27 from sugar import mime
  28 from sugar.bundle.activitybundle import ActivityBundle
  29 from sugar.bundle.contentbundle import ContentBundle
  30 from sugar.bundle.bundle import MalformedBundleException, \
  31      ZipExtractException, RegistrationException
  32 from sugar import util
  33
  34 from journalentrybundle import JournalEntryBundle
  35
  36 def _get_icon_file_name(icon_name):
  37     icon_theme = gtk.icon_theme_get_default()
  38     info = icon_theme.lookup_icon(icon_name, gtk.ICON_SIZE_LARGE_TOOLBAR, 0)
  39     if not info:
  40         # display standard icon when icon for mime type is not found
  41         info = icon_theme.lookup_icon('application-octet-stream',
  42                                       gtk.ICON_SIZE_LARGE_TOOLBAR, 0)
  43     fname = info.get_filename()
  44     del info
  45     return fname
  46
  47 _icon_cache = util.LRU(50)
  48
  49 def get_icon_name(jobject):
  50
  51     cache_key = (jobject.object_id, jobject.metadata.get('timestamp', None))
  52     if cache_key in _icon_cache:
  53         return _icon_cache[cache_key]
  54
  55     file_name = None
  56
  57     if jobject.is_activity_bundle() and jobject.file_path:
  58         try:
  59             bundle = ActivityBundle(jobject.file_path)
  60             file_name = bundle.get_icon()
  61         except:
  62             logging.warning('Could not read bundle:\n' + \
  63                 ''.join(traceback.format_exception(*sys.exc_info())))
  64             file_name = _get_icon_file_name('application-octet-stream')
  65
  66     if not file_name and jobject.metadata['activity']:
  67         service_name = jobject.metadata['activity']
  68         activity_info = activity.get_registry().get_activity(service_name)
  69         if activity_info:
  70             file_name = activity_info.icon
  71
  72     mime_type = jobject.metadata['mime_type']
  73     if not file_name and mime_type:
  74         icon_name = mime.get_mime_icon(mime_type)
  75         if icon_name:
  76             file_name = _get_icon_file_name(icon_name)
  77
  78     if not file_name or not os.path.exists(file_name):
  79         file_name = _get_icon_file_name('application-octet-stream')
  80
  81     _icon_cache[cache_key] = file_name
  82
  83     return file_name
  84
  85 def get_date(jobject):
  86     """ Convert from a string in iso format to a more human-like format. """
  87     if jobject.metadata.has_key('timestamp'):
  88         return util.timestamp_to_elapsed_string(jobject.metadata['timestamp'])
  89     elif jobject.metadata.has_key('mtime'):
  90         ti = time.strptime(jobject.metadata['mtime'], "%Y-%m-%dT%H:%M:%S")
  91         return util.timestamp_to_elapsed_string(time.mktime(ti))
  92     else:
  93         return _('No date')
  94
  95 def get_bundle(jobject):
  96     try:
  97         if jobject.is_activity_bundle() and jobject.file_path:
  98             return ActivityBundle(jobject.file_path)
  99         elif jobject.is_content_bundle() and jobject.file_path:
 100             return ContentBundle(jobject.file_path)
 101         elif jobject.metadata['mime_type'] == JournalEntryBundle.MIME_TYPE \
 102                 and jobject.file_path:
 103             return JournalEntryBundle(jobject.file_path)
 104         else:
 105             return None
 106     except MalformedBundleException, e:
 107         logging.warning('Incorrect bundle: %r' % e)
 108         return None
 109