[gnome-builder] context: add helpers to track unloading state

[Christian Hergert <chergert src gnome org>]

commit 7438dde81856986bd691405efb8e61650587c077
Author: Christian Hergert <chergert redhat com>
Date:   Wed Jan 31 20:10:12 2018 -0800

    context: add helpers to track unloading state
    
    We want to avoid doing work when the context is shutting down,
    so give ourselves a function to check.

 src/libide/ide-context.c | 24 ++++++++++++++++++++++++
 src/libide/ide-context.h |  3 +++
 src/libide/ide-object.c  | 13 +++++++++++++
 src/libide/ide-object.h  |  2 ++
 4 files changed, 42 insertions(+)
---
diff --git a/src/libide/ide-context.c b/src/libide/ide-context.c
index 3b4e2eb77..b22687f61 100644
--- a/src/libide/ide-context.c
+++ b/src/libide/ide-context.c
@@ -140,6 +140,7 @@ struct _IdeContext
 
   guint                     restored : 1;
   guint                     restoring : 1;
+  guint                     unloading : 1;
 };
 
 static void async_initable_init (GAsyncInitableIface *);
@@ -2092,6 +2093,8 @@ ide_context_unload_async (IdeContext          *self,
   g_return_if_fail (IDE_IS_CONTEXT (self));
   g_return_if_fail (!cancellable || G_IS_CANCELLABLE (cancellable));
 
+  self->unloading = TRUE;
+
   task = g_task_new (self, cancellable, callback, user_data);
   g_task_set_source_tag (task, ide_context_unload_async);
 
@@ -2857,3 +2860,24 @@ ide_context_get_project_settings (IdeContext *self)
 
   return g_settings_new_with_path ("org.gnome.builder.project", path);
 }
+
+/**
+ * ide_context_is_unloading:
+ * @self: a #IdeContext
+ *
+ * Checks if ide_context_unload_async() has been called.
+ *
+ * You might use this to avoid starting any new work once the context has
+ * started the shutdown sequence.
+ *
+ * Returns: %TRUE if ide_context_unload_async() has been called.
+ *
+ * Since: 3.28
+ */
+gboolean
+ide_context_is_unloading (IdeContext *self)
+{
+  g_return_val_if_fail (IDE_IS_CONTEXT (self), FALSE);
+
+  return self->unloading;
+}
diff --git a/src/libide/ide-context.h b/src/libide/ide-context.h
index 7d47d5574..bbacc48a0 100644
--- a/src/libide/ide-context.h
+++ b/src/libide/ide-context.h
@@ -144,6 +144,9 @@ gchar                    *ide_context_cache_filename            (IdeContext
 IDE_AVAILABLE_IN_3_28
 IdeVcsMonitor            *ide_context_get_monitor               (IdeContext           *self);
 
+IDE_AVAILABLE_IN_3_28
+gboolean                  ide_context_is_unloading              (IdeContext           *self);
+
 GListModel               *_ide_context_get_pausables            (IdeContext           *self) G_GNUC_INTERNAL;
 gboolean                  _ide_context_is_restoring             (IdeContext           *self) G_GNUC_INTERNAL;
 
diff --git a/src/libide/ide-object.c b/src/libide/ide-object.c
index 6385546d1..b665e098e 100644
--- a/src/libide/ide-object.c
+++ b/src/libide/ide-object.c
@@ -816,3 +816,16 @@ ide_object_warning (gpointer     instance,
   else
     g_warning ("%s", str);
 }
+
+gboolean
+ide_object_is_unloading (IdeObject *object)
+{
+  IdeContext *context;
+
+  g_return_val_if_fail (IDE_IS_OBJECT (object), TRUE);
+
+  if (!(context = ide_object_get_context (object)))
+    return TRUE;
+
+  return ide_context_is_unloading (context);
+}
diff --git a/src/libide/ide-object.h b/src/libide/ide-object.h
index 33c5ec0c0..4fbb58332 100644
--- a/src/libide/ide-object.h
+++ b/src/libide/ide-object.h
@@ -81,5 +81,7 @@ IDE_AVAILABLE_IN_3_28
 void        ide_object_warning                 (gpointer              instance,
                                                 const gchar          *format,
                                                 ...) G_GNUC_PRINTF (2, 3);
+IDE_AVAILABLE_IN_3_28
+gboolean    ide_object_is_unloading            (IdeObject            *self);
 
 G_END_DECLS