[evolution] Bug 766682 - Three-state value for 'download messages for offline' per folder

[Milan Crha <mcrha src gnome org>]

commit 9ea143d5137005f6708396cc6e46ae62dfcd5971
Author: Milan Crha <mcrha redhat com>
Date:   Wed May 25 22:06:06 2016 +0200

    Bug 766682 - Three-state value for 'download messages for offline' per folder

 mail/em-folder-properties.c |  100 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 99 insertions(+), 1 deletions(-)
---
diff --git a/mail/em-folder-properties.c b/mail/em-folder-properties.c
index 2a55f3c..09ac395 100644
--- a/mail/em-folder-properties.c
+++ b/mail/em-folder-properties.c
@@ -133,6 +133,55 @@ add_numbered_row (GtkTable *table,
        return row + 1;
 }
 
+typedef struct _ThreeStateData {
+       CamelFolder *folder;
+       gchar *property_name;
+       gulong handler_id;
+} ThreeStateData;
+
+static void
+three_state_data_free (gpointer data,
+                      GClosure *closure)
+{
+       ThreeStateData *tsd = data;
+
+       if (tsd) {
+               g_clear_object (&tsd->folder);
+               g_free (tsd->property_name);
+               g_free (tsd);
+       }
+}
+
+static void
+emfp_three_state_toggled_cb (GtkToggleButton *widget,
+                            gpointer user_data)
+{
+       ThreeStateData *tsd = user_data;
+       CamelThreeState set_to;
+
+       g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
+       g_return_if_fail (tsd != NULL);
+
+       g_signal_handler_block (widget, tsd->handler_id);
+
+       if (gtk_toggle_button_get_inconsistent (widget) &&
+           gtk_toggle_button_get_active (widget)) {
+               gtk_toggle_button_set_active (widget, FALSE);
+               gtk_toggle_button_set_inconsistent (widget, FALSE);
+               set_to = CAMEL_THREE_STATE_OFF;
+       } else if (!gtk_toggle_button_get_active (widget)) {
+               gtk_toggle_button_set_inconsistent (widget, TRUE);
+               gtk_toggle_button_set_active (widget, FALSE);
+               set_to = CAMEL_THREE_STATE_INCONSISTENT;
+       } else {
+               set_to = CAMEL_THREE_STATE_ON;
+       }
+
+       g_object_set (G_OBJECT (tsd->folder), tsd->property_name, set_to, NULL);
+
+       g_signal_handler_unblock (widget, tsd->handler_id);
+}
+
 static GtkWidget *
 emfp_get_folder_item (EConfig *ec,
                       EConfigItem *item,
@@ -272,7 +321,56 @@ emfp_get_folder_item (EConfig *ec,
                                row++;
                                break;
                        default:
-                               g_warn_if_reached ();
+                               if (properties[ii]->value_type == CAMEL_TYPE_THREE_STATE) {
+                                       ThreeStateData *tsd;
+                                       GValue value = G_VALUE_INIT;
+                                       CamelThreeState three_state;
+                                       gboolean set_inconsistent = FALSE, set_active = FALSE;
+
+                                       g_value_init (&value, properties[ii]->value_type);
+
+                                       g_object_get_property (G_OBJECT (context->folder), 
properties[ii]->name, &value);
+                                       three_state = g_value_get_enum (&value);
+                                       g_value_unset (&value);
+
+                                       switch (three_state) {
+                                               case CAMEL_THREE_STATE_ON:
+                                                       set_inconsistent = FALSE;
+                                                       set_active = TRUE;
+                                                       break;
+                                               case CAMEL_THREE_STATE_OFF:
+                                                       set_inconsistent = FALSE;
+                                                       set_active = FALSE;
+                                                       break;
+                                               case CAMEL_THREE_STATE_INCONSISTENT:
+                                                       set_inconsistent = TRUE;
+                                                       set_active = FALSE;
+                                                       break;
+                                       }
+
+                                       widget = gtk_check_button_new_with_mnemonic (blurb);
+
+                                       g_object_set (G_OBJECT (widget),
+                                               "inconsistent", set_inconsistent,
+                                               "active", set_active,
+                                               NULL);
+
+                                       tsd = g_new0 (ThreeStateData, 1);
+                                       tsd->folder = g_object_ref (context->folder);
+                                       tsd->property_name = g_strdup (properties[ii]->name);
+                                       tsd->handler_id = g_signal_connect_data (widget, "toggled",
+                                               G_CALLBACK (emfp_three_state_toggled_cb),
+                                               tsd, three_state_data_free, 0);
+
+                                       gtk_widget_show (widget);
+                                       gtk_table_attach (
+                                               GTK_TABLE (table), widget,
+                                               0, 2, row, row + 1,
+                                               GTK_FILL | GTK_EXPAND, 0, 0, 0);
+                                       row++;
+                               } else {
+                                       g_warn_if_reached ();
+                               }
                                break;
                }
        }