[gnome-builder] buildui: track changes to pipeline PTY

[Christian Hergert <chergert src gnome org>]

commit 1729b3557fc55ea096ba044753ec947068744317
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 18 18:56:03 2018 -0800

    buildui: track changes to pipeline PTY
    
    When the PTY changes, we need to connect it to the terminal. This fixes an
    issue where the pipeline is not ready on startup so that the user wont
    see the PTY at all, even when the runtime installation succeeds.
    
    #354

 src/libide/buildui/ide-build-log-panel.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/buildui/ide-build-log-panel.c b/src/libide/buildui/ide-build-log-panel.c
index 76e4e2f36..0bb36fdc6 100644
--- a/src/libide/buildui/ide-build-log-panel.c
+++ b/src/libide/buildui/ide-build-log-panel.c
@@ -73,6 +73,18 @@ ide_build_log_panel_log_observer (IdeBuildLogStream  stream,
   vte_terminal_feed (VTE_TERMINAL (self->terminal), "\r\n", -1);
 }
 
+static void
+ide_build_log_panel_notify_pty (IdeBuildLogPanel *self,
+                                GParamSpec       *pspec,
+                                IdeBuildPipeline *pipeline)
+{
+  g_assert (IDE_IS_BUILD_LOG_PANEL (self));
+  g_assert (IDE_IS_BUILD_PIPELINE (pipeline));
+
+  vte_terminal_set_pty (VTE_TERMINAL (self->terminal),
+                        ide_build_pipeline_get_pty (pipeline));
+}
+
 void
 ide_build_log_panel_set_pipeline (IdeBuildLogPanel *self,
                                   IdeBuildPipeline *pipeline)
@@ -84,6 +96,9 @@ ide_build_log_panel_set_pipeline (IdeBuildLogPanel *self,
     {
       if (self->pipeline != NULL)
         {
+          g_signal_handlers_disconnect_by_func (self->pipeline,
+                                                G_CALLBACK (ide_build_log_panel_notify_pty),
+                                                self);
           ide_build_pipeline_remove_log_observer (self->pipeline, self->log_observer);
           self->log_observer = 0;
           g_clear_object (&self->pipeline);
@@ -100,7 +115,12 @@ ide_build_log_panel_set_pipeline (IdeBuildLogPanel *self,
                                                  NULL);
           vte_terminal_reset (VTE_TERMINAL (self->terminal), TRUE, TRUE);
           vte_terminal_set_pty (VTE_TERMINAL (self->terminal),
-                                _ide_build_pipeline_get_pty (pipeline));
+                                ide_build_pipeline_get_pty (pipeline));
+          g_signal_connect_object (pipeline,
+                                   "notify::pty",
+                                   G_CALLBACK (ide_build_log_panel_notify_pty),
+                                   self,
+                                   G_CONNECT_SWAPPED);
         }
     }
 }