[Sugar-devel] [PATCH [v2] Browse] Cancel a download if space is very tight SL #394

[Manuel Kaufmann]

If there are less than 50Mb free on the Hard Disk the downloading
process is canceled and this is informed to the user via an Alert.

Signed-off-by: Manuel Kaufmann <humitos at gmail.com>
---
 downloadmanager.py | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/downloadmanager.py b/downloadmanager.py
index ab9fec2..b63f0fe 100644
--- a/downloadmanager.py
+++ b/downloadmanager.py
@@ -55,6 +55,12 @@ def remove_all_downloads():
         download.cleanup()
 
 
+# http://stackoverflow.com/questions/787776/find-free-disk-space-in-python-on-os-x
+def free_space(path):
+    s = os.statvfs(path)
+    return (s.f_bavail * s.f_frsize) / 1024 / 1024
+
+
 class Download(object):
     def __init__(self, download, browser):
         self._download = download
@@ -88,8 +94,26 @@ class Download(object):
 
     def __progress_change_cb(self, download, something):
         progress = self._download.get_progress()
-        self.dl_jobject.metadata['progress'] = str(int(progress * 100))
-        datastore.write(self.dl_jobject)
+
+        # Check free space and if there is less than 50Mb, then cancel
+        # the download
+        if free_space('/') < 50:
+            self.cancel()
+
+            self._canceled_alert = Alert()
+            self._canceled_alert.props.title = _('Download canceled '
+                                                  'because of Disk Space')
+            self._canceled_alert.props.msg = \
+                _('%s' % self._download.get_suggested_filename())
+            ok_icon = Icon(icon_name='dialog-ok')
+            self._canceled_alert.add_button(Gtk.ResponseType.OK,
+                                             _('Ok'), ok_icon)
+            ok_icon.show()
+            self._canceled_alert.connect('response', self.__stop_response_cb)
+            self._activity.add_alert(self._canceled_alert)
+        else:
+            self.dl_jobject.metadata['progress'] = str(int(progress * 100))
+            datastore.write(self.dl_jobject)
 
     def __state_change_cb(self, download, gparamspec):
         state = self._download.get_status()
-- 
1.7.11.4