gui.py

   1 import gtk, os, gobject, sys
   2
   3 from zeroinstall.injector.policy import Policy
   4 from zeroinstall.injector import download
   5 from zeroinstall.injector.model import SafeException
   6 from zeroinstall.injector.reader import InvalidInterface
   7 import dialog
   8 from checking import CheckingBox
   9
  10 version = '0.8'
  11
  12 # Singleton Policy
  13 policy = None
  14
  15 class GUIPolicy(Policy):
  16         window = None
  17         pulse = None
  18         monitored_downloads = None
  19         checking = None         # GtkDialog ("Checking for updates...")
  20         original_implementation = None
  21
  22         def __init__(self, interface, prog_args, download_only, refresh):
  23                 Policy.__init__(self, interface)
  24                 global policy
  25                 assert policy is None
  26                 policy = self
  27                 self.monitored_downloads = []
  28
  29                 import mainwindow
  30                 self.window = mainwindow.MainWindow(prog_args, download_only)
  31                 root = policy.get_interface(policy.root)
  32                 self.window.browser.set_root(root)
  33
  34                 if refresh:
  35                         if root.name is not None:
  36                                 self.checking = CheckingBox(root)
  37                                 def checking_destroyed(c):
  38                                         self.checking = None
  39                                         if self.ready is False or self.versions_changed():
  40                                                 self.window.show()
  41                                         else:
  42                                                 import download_box
  43                                                 download_box.download_with_gui(self.window, prog_args,
  44                                                                         run_afterwards = not download_only)
  45                                 self.checking.connect('destroy', checking_destroyed)
  46
  47                         self.refresh_all(force = False)
  48
  49         def monitor_download(self, dl):
  50                 self.monitored_downloads.append(dl)
  51
  52                 error_stream = dl.start()
  53                 def error_ready(src, cond):
  54                         got = os.read(src.fileno(), 100)
  55                         if not got:
  56                                 error_stream.close()
  57                                 self.monitored_downloads.remove(dl)
  58                                 if len(self.monitored_downloads) == 0:
  59                                         gobject.source_remove(self.pulse)
  60                                         self.window.progress.hide()
  61                                         self.pulse = None
  62                                 try:
  63                                         data = dl.error_stream_closed()
  64                                         self.check_signed_data(dl, data)
  65                                 except download.DownloadError, ex:
  66                                         dialog.alert(self.window,
  67                                                 "Error downloading interface '%s':\n\n%s" %
  68                                                 (dl.interface.uri, ex))
  69                                 except InvalidInterface, ex:
  70                                         dialog.alert(self.window,
  71                                                 "Syntax error in downloaded interface '%s':\n\n%s" %
  72                                                 (dl.interface.uri, ex))
  73                                 except SafeException, ex:
  74                                         dialog.alert(self.window,
  75                                                 "Error updating interface '%s':\n\n%s" %
  76                                                 (dl.interface.uri, ex))
  77                                 if len(self.monitored_downloads) == 0 and self.checking:
  78                                         self.checking.updates_done(self.versions_changed())
  79                                 return False
  80                         dl.error_stream_data(got)
  81                         return True
  82
  83                 gobject.io_add_watch(error_stream,
  84                                      gobject.IO_IN | gobject.IO_HUP,
  85                                      error_ready)
  86
  87                 if self.pulse is None:
  88                         def pulse():
  89                                 if self.checking:
  90                                         self.checking.progress.pulse()
  91                                 else:
  92                                         self.window.progress.pulse()
  93                                 return True
  94                         self.pulse = gobject.timeout_add(50, pulse)
  95                         self.window.progress.show()
  96
  97         def recalculate(self):
  98                 Policy.recalculate(self)
  99                 try:
 100                         self.ready
 101                 except:
 102                         self.ready = True
 103                         print >>sys.stderr, "Your version of the injector is very old. " \
 104                                 "Try upgrading (http://0install.net/injector.html)"
 105                 else:
 106                         self.window.set_response_sensitive(gtk.RESPONSE_OK, self.ready)
 107
 108         def confirm_trust_keys(self, interface, sigs, iface_xml):
 109                 import trust_box
 110                 trust_box.confirm_trust(interface, sigs, iface_xml)
 111
 112         def main(self):
 113                 if self.checking:
 114                         self.checking.show()
 115                 else:
 116                         self.window.show()
 117                 gtk.main()
 118
 119         def get_best_source(self, impl):
 120                 """Return the best download source for this implementation."""
 121                 return impl.download_sources[0]
 122
 123         # XXX: Remove this. Moved to Policy.
 124         def refresh_all(self, force = True):
 125                 for x in self.walk_interfaces():
 126                         self.begin_iface_download(x, force)
 127
 128         def abort_all_downloads(self):
 129                 for x in self.monitored_downloads[:]:
 130                         x.abort()
 131
 132         def set_original_implementations(self):
 133                 assert self.original_implementation is None
 134                 self.original_implementation = policy.implementation.copy()
 135
 136         def versions_changed(self):
 137                 """Return whether we have now chosen any different implementations.
 138                 If so, we want to show the dialog to the user to confirm the new ones."""
 139                 assert self.ready
 140                 if not self.original_implementation:
 141                         print "No originals"
 142                         return True             # Shouldn't happen?
 143                 if len(self.original_implementation) != len(self.implementation):
 144                         print "Size changed"
 145                         return True
 146                 for iface in self.original_implementation:
 147                         old = self.original_implementation[iface]
 148                         if old is None:
 149                                 print "Old interface is None"
 150                                 return True
 151                         new = self.implementation.get(iface, None)
 152                         if new is None:
 153                                 print "New interface is None"
 154                                 return True
 155                         if old.id != new.id:
 156                                 print "IDs differ"
 157                                 return True
 158                 return False
 159
 160 def pretty_size(size):
 161         if size is None:
 162                 return '?'
 163         if size < 2048:
 164                 return '%d bytes' % size
 165         size = float(size)
 166         for unit in ('Kb', 'Mb', 'Gb', 'Tb'):
 167                 size /= 1024
 168                 if size < 2048:
 169                         break
 170         return '%.1f %s' % (size, unit)