[gnome-builder/wip/chergert/bug1] debugger: adjust where handlers are executed

[Christian Hergert <chergert src gnome org>]

commit ce0a2d8e272f2ffae090fb98b7d2ff6ffebc3598
Author: Christian Hergert <chergert redhat com>
Date:   Sat Aug 26 22:13:41 2017 -0700

    debugger: adjust where handlers are executed
    
    We want to allow plugins like terminal to set the TTY before we access
    things from our run handlers.

 libide/runner/ide-run-manager.c |   41 +++++++++++++++++++++++++++++---------
 1 files changed, 31 insertions(+), 10 deletions(-)
---
diff --git a/libide/runner/ide-run-manager.c b/libide/runner/ide-run-manager.c
index 026b714..516f2af 100644
--- a/libide/runner/ide-run-manager.c
+++ b/libide/runner/ide-run-manager.c
@@ -72,6 +72,21 @@ static GParamSpec *properties [N_PROPS];
 static guint signals [N_SIGNALS];
 
 static void
+ide_run_manager_real_run (IdeRunManager *self,
+                          IdeRunner     *runner)
+{
+  g_assert (IDE_IS_RUN_MANAGER (self));
+  g_assert (IDE_IS_RUNNER (runner));
+
+  /*
+   * If the current handler has a callback specified (our default "run" handler
+   * does not), then we need to allow that handler to prepare the runner.
+   */
+  if (self->handler != NULL && self->handler->handler != NULL)
+    self->handler->handler (self, runner, self->handler->handler_data);
+}
+
+static void
 ide_run_handler_info_free (gpointer data)
 {
   IdeRunHandlerInfo *info = data;
@@ -264,18 +279,24 @@ ide_run_manager_class_init (IdeRunManagerClass *klass)
    * This signal is emitted right before ide_runner_run_async() is called
    * on an #IdeRunner. It can be used by plugins to tweak things right
    * before the runner is executed.
+   *
+   * The current run handler (debugger, profiler, etc) is run as the default
+   * handler for this function. So connect with %G_SIGNAL_AFTER if you want
+   * to be nofied after the run handler has executed. It's unwise to change
+   * things that the run handler might expect. Generally if you want to
+   * change settings, do that before the run handler has exected.
    */
   signals [RUN] =
-    g_signal_new ("run",
-                  G_TYPE_FROM_CLASS (klass),
-                  G_SIGNAL_RUN_LAST,
-                  0,
-                  NULL,
-                  NULL,
-                  NULL,
-                  G_TYPE_NONE,
-                  1,
-                  IDE_TYPE_RUNNER);
+    g_signal_new_class_handler ("run",
+                                G_TYPE_FROM_CLASS (klass),
+                                G_SIGNAL_RUN_LAST,
+                                G_CALLBACK (ide_run_manager_real_run),
+                                NULL,
+                                NULL,
+                                NULL,
+                                G_TYPE_NONE,
+                                1,
+                                IDE_TYPE_RUNNER);
 
   /**
    * IdeRunManager::stopped: