[gnome-builder] diagnostic-provider: add IdeDiagnosticProvider::invalidated signal

[Christian Hergert <chergert src gnome org>]

commit 71aef68d81076e7d8ed83b6928efa4acb2421dd9
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 27 18:15:28 2016 -0700

    diagnostic-provider: add IdeDiagnosticProvider::invalidated signal
    
    This allows diagnostic providers to notify the system that their list of
    diagnostics has changed out of band. This is useful for systems that do
    not require a diagnose_async()/diagnose_finish() pair to get updates to
    diagnostics.

 libide/diagnostics/ide-diagnostic-provider.c |   28 ++++++++++++++++++++++++++
 libide/diagnostics/ide-diagnostic-provider.h |   17 ++++++++-------
 2 files changed, 37 insertions(+), 8 deletions(-)
---
diff --git a/libide/diagnostics/ide-diagnostic-provider.c b/libide/diagnostics/ide-diagnostic-provider.c
index af0a45f..60d1ba4 100644
--- a/libide/diagnostics/ide-diagnostic-provider.c
+++ b/libide/diagnostics/ide-diagnostic-provider.c
@@ -25,6 +25,13 @@
 
 G_DEFINE_INTERFACE (IdeDiagnosticProvider, ide_diagnostic_provider, IDE_TYPE_OBJECT)
 
+enum {
+  INVALIDATED,
+  N_SIGNALS
+};
+
+static guint signals [N_SIGNALS];
+
 static void
 ide_diagnostic_provider_default_init (IdeDiagnosticProviderInterface *iface)
 {
@@ -34,6 +41,19 @@ ide_diagnostic_provider_default_init (IdeDiagnosticProviderInterface *iface)
                                                             "Context",
                                                             IDE_TYPE_CONTEXT,
                                                             (G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | 
G_PARAM_STATIC_STRINGS)));
+
+  /**
+   * IdeDiagnosticProvider::invlaidated:
+   *
+   * This signal should be emitted by diagnostic providers when they know their
+   * diagnostics have been invalidated out-of-band.
+   */
+  signals [INVALIDATED] =
+    g_signal_new ("invalidated",
+                  G_TYPE_FROM_INTERFACE (iface),
+                  G_SIGNAL_RUN_LAST,
+                  0, NULL, NULL, NULL, G_TYPE_NONE, 0);
+
 }
 
 void
@@ -67,3 +87,11 @@ ide_diagnostic_provider_diagnose_finish (IdeDiagnosticProvider  *self,
 
   return IDE_DIAGNOSTIC_PROVIDER_GET_IFACE (self)->diagnose_finish (self, result, error);
 }
+
+void
+ide_diagnostic_provider_emit_invalidated (IdeDiagnosticProvider *self)
+{
+  g_return_if_fail (IDE_IS_DIAGNOSTIC_PROVIDER (self));
+
+  g_signal_emit (self, signals [INVALIDATED], 0);
+}
diff --git a/libide/diagnostics/ide-diagnostic-provider.h b/libide/diagnostics/ide-diagnostic-provider.h
index 517d21c..453cc2a 100644
--- a/libide/diagnostics/ide-diagnostic-provider.h
+++ b/libide/diagnostics/ide-diagnostic-provider.h
@@ -43,14 +43,15 @@ struct _IdeDiagnosticProviderInterface
                                       GError                **error);
 };
 
-void            ide_diagnostic_provider_diagnose_async  (IdeDiagnosticProvider  *self,
-                                                         IdeFile                *file,
-                                                         GCancellable           *cancellable,
-                                                         GAsyncReadyCallback     callback,
-                                                         gpointer                user_data);
-IdeDiagnostics *ide_diagnostic_provider_diagnose_finish (IdeDiagnosticProvider  *self,
-                                                         GAsyncResult           *result,
-                                                         GError                **error);
+void            ide_diagnostic_provider_diagnose_async   (IdeDiagnosticProvider  *self,
+                                                          IdeFile                *file,
+                                                          GCancellable           *cancellable,
+                                                          GAsyncReadyCallback     callback,
+                                                          gpointer                user_data);
+IdeDiagnostics *ide_diagnostic_provider_diagnose_finish  (IdeDiagnosticProvider  *self,
+                                                          GAsyncResult           *result,
+                                                          GError                **error);
+void            ide_diagnostic_provider_emit_invalidated (IdeDiagnosticProvider  *self);
 
 G_END_DECLS