From 2657ce9bca6552d484d69c1c50396508ffdaa1a9 Mon Sep 17 00:00:00 2001
From: anishmangal2002 <anishmangal2002@gmail.com>
Date: Sat, 3 Jul 2010 00:25:25 +0530
Subject: [PATCH] Journal:show error message on write failure: #1842

volumestoolbar.py now catches the IOError and ValueError
exceptions and emits 'volume-error'signal. This signal is
caught in journalactivity.py which displays the error as
an ErrorAlert message.

Signed-off-by: anishmangal2002 <anishmangal2002@gmail.com>
---
 src/jarabe/journal/journalactivity.py |   12 ++++++++++++
 src/jarabe/journal/volumestoolbar.py  |   30 ++++++++++++++++++++++++++++--
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/src/jarabe/journal/journalactivity.py b/src/jarabe/journal/journalactivity.py
index 0559560..e278420 100644
--- a/src/jarabe/journal/journalactivity.py
+++ b/src/jarabe/journal/journalactivity.py
@@ -27,6 +27,8 @@ import statvfs
 import os
 
 from sugar.graphics.window import Window
+from sugar.graphics.alert import ErrorAlert
+
 from sugar.bundle.bundle import ZipExtractException, RegistrationException
 from sugar import env
 from sugar.activity import activityfactory
@@ -138,6 +140,15 @@ class JournalActivity(Window):
         self._critical_space_alert = None
         self._check_available_space()
 
+    def __alert_notify_cb(self, gobject, strerror, severity):
+        alert = ErrorAlert(title=severity, msg=strerror)
+        alert.connect('response', self.__alert_response_cb)
+        self.add_alert(alert)
+        alert.show()
+
+    def __alert_response_cb(self, alert, response_id):
+        self.remove_alert(alert)
+
     def __realize_cb(self, window):
         wm.set_bundle_id(window.window, _BUNDLE_ID)
         activity_id = activityfactory.create_activity_id()
@@ -161,6 +172,7 @@ class JournalActivity(Window):
         self._volumes_toolbar = VolumesToolbar()
         self._volumes_toolbar.connect('volume-changed',
                                       self.__volume_changed_cb)
+        self._volumes_toolbar.connect('volume-error', self.__alert_notify_cb)
         self._main_view.pack_start(self._volumes_toolbar, expand=False)
 
         search_toolbar = self._main_toolbox.search_toolbar
diff --git a/src/jarabe/journal/volumestoolbar.py b/src/jarabe/journal/volumestoolbar.py
index 74b974c..8b7786f 100644
--- a/src/jarabe/journal/volumestoolbar.py
+++ b/src/jarabe/journal/volumestoolbar.py
@@ -15,6 +15,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 import logging
+import os
 from gettext import gettext as _
 
 import gobject
@@ -35,7 +36,10 @@ class VolumesToolbar(gtk.Toolbar):
     __gsignals__ = {
         'volume-changed': (gobject.SIGNAL_RUN_FIRST,
                            gobject.TYPE_NONE,
-                           ([str]))
+                           ([str])),
+        'volume-error': (gobject.SIGNAL_RUN_FIRST,
+                           gobject.TYPE_NONE,
+                           ([str, str]))
     }
 
     def __init__(self):
@@ -81,6 +85,7 @@ class VolumesToolbar(gtk.Toolbar):
         button = VolumeButton(mount)
         button.props.group = self._volume_buttons[0]
         button.connect('toggled', self._button_toggled_cb)
+        button.connect('volume-error', self.__volume_error_cb)
         position = self.get_item_index(self._volume_buttons[-1]) + 1
         self.insert(button, position)
         button.show()
@@ -90,6 +95,9 @@ class VolumesToolbar(gtk.Toolbar):
         if len(self.get_children()) > 1:
             self.show()
 
+    def __volume_error_cb(self, button, strerror, severity):
+        self.emit('volume-error', strerror, severity)
+
     def _button_toggled_cb(self, button):
         if button.props.active:
             self.emit('volume-changed', button.mount_point)
@@ -123,6 +131,12 @@ class VolumesToolbar(gtk.Toolbar):
         button.props.active = True
 
 class BaseButton(RadioToolButton):
+    __gsignals__ = {
+        'volume-error': (gobject.SIGNAL_RUN_FIRST,
+                           gobject.TYPE_NONE,
+                           ([str, str]))
+    }
+
     def __init__(self, mount_point):
         RadioToolButton.__init__(self)
 
@@ -137,7 +151,19 @@ class BaseButton(RadioToolButton):
                                info, timestamp):
         object_id = selection_data.data
         metadata = model.get(object_id)
-        model.copy(metadata, self.mount_point)
+        file_path = model.get_file(metadata['uid'])
+        if not file_path or not os.path.exists(file_path):
+            logging.warn('File does not exist')
+            self.emit('volume-error', _('Entries without a file cannot'
+                ' be copied'), _('Warning'))
+            return
+
+        try:
+            model.copy(metadata, self.mount_point)
+        except IOError:
+            logging.exception('BaseButton._drag_data_received_cb: Error'
+                'while copying')
+            self.emit('volume-error', _('Input/Output error'), _('Error'))
 
 class VolumeButton(BaseButton):
     def __init__(self, mount):
-- 
1.7.2