[gnome-todo] manager: Add filtered tasks model by default

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit b700768c3e1e84c2a2c59e7ba7a6a2ede5100db8
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Jun 29 20:35:18 2019 -0300

    manager: Add filtered tasks model by default
    
    Archived task lists should not show their tasks in the
    regular panels. However, as it is right now, we are
    passing all tasks, even from archived task lists, as
    the tasks model.
    
    Add an filtered tasks model, removing tasks from archived
    lists, and make it the default. Also add another function
    to retrieve all tasks, even from archived lists.

 src/engine/gtd-manager.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
 src/engine/gtd-manager.h |  2 ++
 2 files changed, 49 insertions(+), 1 deletion(-)
---
diff --git a/src/engine/gtd-manager.c b/src/engine/gtd-manager.c
index 936feef..6c9c493 100644
--- a/src/engine/gtd-manager.c
+++ b/src/engine/gtd-manager.c
@@ -58,6 +58,7 @@ struct _GtdManager
 
   GListModel         *lists_model;
   GListModel         *tasks_model;
+  GListModel         *unarchived_tasks_model;
 
   GList              *providers;
   GList              *panels;
@@ -120,6 +121,19 @@ check_provider_is_default (GtdManager  *self,
  * Callbacks
  */
 
+static gboolean
+filter_achived_lists_func (gpointer item,
+                           gpointer user_data)
+{
+  GtdTaskList *list;
+  GtdTask *task;
+
+  task = (GtdTask*) item;
+  list = gtd_task_get_list (task);
+
+  return !gtd_task_list_get_archived (list);
+}
+
 static gint
 compare_lists_cb (GtdTaskList *list_a,
                   GtdTaskList *list_b,
@@ -209,6 +223,8 @@ on_list_changed_cb (GtdProvider *provider,
                        (GCompareDataFunc) compare_lists_cb,
                        self);
 
+  gtk_filter_list_model_refilter (GTK_FILTER_LIST_MODEL (self->unarchived_tasks_model));
+
   g_signal_emit (self, signals[LIST_CHANGED], 0, list);
 }
 
@@ -305,6 +321,7 @@ gtd_manager_finalize (GObject *object)
   g_clear_object (&self->plugin_manager);
   g_clear_object (&self->settings);
   g_clear_object (&self->clock);
+  g_clear_object (&self->unarchived_tasks_model);
   g_clear_object (&self->lists_model);
 
   G_OBJECT_CLASS (gtd_manager_parent_class)->finalize (object);
@@ -617,6 +634,10 @@ gtd_manager_init (GtdManager *self)
   self->cancellable = g_cancellable_new ();
   self->lists_model = (GListModel*) gtd_list_store_new (GTD_TYPE_TASK_LIST);
   self->tasks_model = (GListModel*) _gtd_task_model_new (self);
+  self->unarchived_tasks_model = (GListModel*) gtk_filter_list_model_new (self->tasks_model,
+                                                                          filter_achived_lists_func,
+                                                                          self,
+                                                                          NULL);
 }
 
 /**
@@ -912,6 +933,27 @@ gtd_manager_get_task_lists_model (GtdManager *self)
   return self->lists_model;
 }
 
+
+/**
+ * gtd_manager_get_all_tasks_model:
+ * @self: a #GtdManager
+ *
+ * Retrieves the #GListModel containing #GtdTasks from
+ * @self. You can use the this model to bind to GtkListBox
+ * or other widgets.
+ *
+ * The model is sorted.
+ *
+ * Returns: (transfer none): a #GListModel
+ */
+GListModel*
+gtd_manager_get_all_tasks_model (GtdManager *self)
+{
+  g_return_val_if_fail (GTD_IS_MANAGER (self), NULL);
+
+  return self->tasks_model;
+}
+
 /**
  * gtd_manager_get_tasks_model:
  * @self: a #GtdManager
@@ -920,6 +962,10 @@ gtd_manager_get_task_lists_model (GtdManager *self)
  * @self. You can use the this model to bind to GtkListBox
  * or other widgets.
  *
+ * The model returned by this function is filtered to only
+ * contain tasks from unarchived lists. If you need all tasks,
+ * see gtd_manager_get_all_tasks_model().
+ *
  * The model is sorted.
  *
  * Returns: (transfer none): a #GListModel
@@ -929,7 +975,7 @@ gtd_manager_get_tasks_model (GtdManager *self)
 {
   g_return_val_if_fail (GTD_IS_MANAGER (self), NULL);
 
-  return self->tasks_model;
+  return self->unarchived_tasks_model;
 }
 
 void
diff --git a/src/engine/gtd-manager.h b/src/engine/gtd-manager.h
index c8661b3..27efc83 100644
--- a/src/engine/gtd-manager.h
+++ b/src/engine/gtd-manager.h
@@ -74,6 +74,8 @@ GtdClock*            gtd_manager_get_clock                       (GtdManager
 
 GListModel*          gtd_manager_get_task_lists_model            (GtdManager         *self);
 
+GListModel*          gtd_manager_get_all_tasks_model             (GtdManager         *self);
+
 GListModel*          gtd_manager_get_tasks_model                 (GtdManager         *self);
 
 G_END_DECLS