[baobab/wip/vala] Handle scanning error without aborting the scan

[Paolo Borelli <pborelli src gnome org>]

commit fe0686f115c5c9b80a83e49a2d5c414505e04a0d
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Feb 5 14:43:13 2012 +0100

    Handle scanning error without aborting the scan
    
    Errors encountered during now show a warning in the info bar, but do not
    completely abort the scan. Errors are stored in the model but are not
    yet shown in the treeview.

 src/baobab-scanner.vala          |    5 ++++-
 src/baobab-threaded-scanner.vala |   21 ++++++++++++++-------
 src/baobab-window.vala           |    6 ++----
 3 files changed, 20 insertions(+), 12 deletions(-)
---
diff --git a/src/baobab-scanner.vala b/src/baobab-scanner.vala
index e96de17..864300b 100644
--- a/src/baobab-scanner.vala
+++ b/src/baobab-scanner.vala
@@ -8,6 +8,7 @@ namespace Baobab {
 			ALLOC_SIZE,
 			ELEMENTS,
 			STATE,
+			ERROR,
 			COLUMNS
 		}
 
@@ -15,6 +16,7 @@ namespace Baobab {
 			SCANNING,
 			CANCELLED,
 			NEED_PERCENT,
+			ERROR,
 			DONE
 		}
 
@@ -73,7 +75,8 @@ namespace Baobab {
 			                  typeof (uint64),  // SIZE
 			                  typeof (uint64),  // ALLOC_SIZE
 			                  typeof (int),     // ELEMENTS
-			                  typeof (State)}); // STATE
+			                  typeof (State),   // STATE
+			                  typeof (Error)}); // ERROR (if STATE is ERROR)
 			set_sort_column_id (Columns.SIZE, Gtk.SortType.DESCENDING);
 			excluded_locations = Application.get_excluded_locations ();
 		}
diff --git a/src/baobab-threaded-scanner.vala b/src/baobab-threaded-scanner.vala
index d798d70..b7dd3dd 100644
--- a/src/baobab-threaded-scanner.vala
+++ b/src/baobab-threaded-scanner.vala
@@ -199,18 +199,25 @@ namespace Baobab {
 					     Columns.ALLOC_SIZE, results.alloc_size,
 					     Columns.PERCENT,    results.percent,
 					     Columns.ELEMENTS,   results.elements,
-					     Columns.STATE,      State.DONE);
+					     Columns.STATE,      results.error == null ? State.DONE : State.ERROR,
+					     Columns.ERROR,      results.error);
 
 					if (results.max_depth > max_depth) {
 						max_depth = results.max_depth;
 					}
 
-					// only on the first error
-					if (scan_error == null && results.error != null) {
-						scan_error = results.error;
-						cancellable.cancel ();
-						completed ();
-						return false;
+					// If the user cancelled abort the scan and
+					// report CANCELLED as the error, otherwise
+					// consider the error not fatal and report the
+					// first error we encountered
+					if (results.error != null) {
+						if (results.error is IOError.CANCELLED) {
+							scan_error = results.error;
+							completed ();
+							return false;
+						} else if (scan_error == null) {
+							scan_error = results.error;
+						}
 					}
 
 					if (results.parent == null) {
diff --git a/src/baobab-window.vala b/src/baobab-window.vala
index b2f6345..cee8a66 100644
--- a/src/baobab-window.vala
+++ b/src/baobab-window.vala
@@ -438,17 +438,15 @@ namespace Baobab {
 			clear_message ();
 			set_busy (true);
 			scanner.completed.connect(() => {
+				set_busy (false);
 				try {
 					scanner.finish();
 				} catch (IOError.CANCELLED e) {
 					// Handle cancellation silently
 					scanner.clear ();
 				} catch (Error e) {
-					var primary = _("Could not scan folder \"%s\"").printf (scanner.directory.get_parse_name ());
+					var primary = _("Could not scan folder \"%s\" or some of the folders it contains.").printf (scanner.directory.get_parse_name ());
 					message (primary, e.message, Gtk.MessageType.WARNING);
-					scanner.clear ();
-				} finally {
-					set_busy (false);
 				}
 			});
 		}