[gitg/wip/fetch] Update refs after remote tip updates

[Jesse van den Kieboom <jessevdk src gnome org>]

commit b399bb2f4f17a47f8d9346c4b215fb5ed8d23b07
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Tue Dec 23 19:14:03 2014 +0100

    Update refs after remote tip updates

 gitg/history/gitg-history-refs-list.vala |   77 ++++++++++++++++++++++++++----
 gitg/history/gitg-history.vala           |   13 +++++
 2 files changed, 80 insertions(+), 10 deletions(-)
---
diff --git a/gitg/history/gitg-history-refs-list.vala b/gitg/history/gitg-history-refs-list.vala
index 8e8fa1c..b52bc46 100644
--- a/gitg/history/gitg-history-refs-list.vala
+++ b/gitg/history/gitg-history-refs-list.vala
@@ -425,6 +425,8 @@ public class RefsList : Gtk.ListBox
        private Gtk.ListBoxRow? d_selected_row;
        private Gitg.Remote[] d_remotes;
 
+       public signal void changed();
+
        private class RemoteHeader
        {
                public RefHeader header;
@@ -609,7 +611,43 @@ public class RefsList : Gtk.ListBox
                                    Ggit.OId    a,
                                    Ggit.OId    b)
        {
-               stdout.printf("remote tip updated: %s, %s, %s\n", refname, a.to_string()[0:6], 
b.to_string()[0:6]);
+               if (a.is_zero())
+               {
+                       Gitg.Ref reference;
+
+                       repository.clear_refs_cache();
+
+                       try
+                       {
+                               reference = repository.lookup_reference(refname);
+                       }
+                       catch (Error e)
+                       {
+                               stderr.printf("Failed to lookup new reference '%s': %s\n", refname, 
e.message);
+                               return;
+                       }
+
+                       add_ref(reference);
+               }
+               else if (b.is_zero())
+               {
+                       // Reference was removed, we need to find it by name
+                       foreach (var reference in d_ref_map.keys)
+                       {
+                               if (reference.get_name() == refname)
+                               {
+                                       repository.clear_refs_cache();
+                                       remove_ref(reference);
+                                       break;
+                               }
+                       }
+               }
+               else
+               {
+                       // Ref just got updated, we should already have it. Just emit changed.
+                       repository.clear_refs_cache();
+                       changed();
+               }
        }
 
        private RefHeader add_remote_header(string name)
@@ -673,9 +711,15 @@ public class RefsList : Gtk.ListBox
                return add_ref_row(reference, animation);
        }
 
-       public void add_ref(Gitg.Ref reference)
+       public bool add_ref(Gitg.Ref reference)
        {
-               add_ref_internal(reference, RefAnimation.ANIMATE);
+               if (add_ref_internal(reference, RefAnimation.ANIMATE) != null)
+               {
+                       changed();
+                       return true;
+               }
+
+               return false;
        }
 
        public void replace_ref(Gitg.Ref old_ref, Gitg.Ref new_ref)
@@ -687,12 +731,17 @@ public class RefsList : Gtk.ListBox
                        select = (get_selected_row() == d_ref_map[old_ref]);
                }
 
-               remove_ref_internal(old_ref, RefAnimation.ANIMATE);
-               add_ref_internal(new_ref, RefAnimation.ANIMATE);
+               var removed = remove_ref_internal(old_ref, RefAnimation.ANIMATE);
+               var newrow = add_ref_internal(new_ref, RefAnimation.ANIMATE);
 
                if (select)
                {
-                       select_row(d_ref_map[new_ref]);
+                       select_row(newrow);
+               }
+
+               if (removed || newrow != null)
+               {
+                       changed();
                }
        }
 
@@ -718,11 +767,11 @@ public class RefsList : Gtk.ListBox
                return name == "HEAD";
        }
 
-       private void remove_ref_internal(Gitg.Ref reference, RefAnimation animation = RefAnimation.NONE)
+       private bool remove_ref_internal(Gitg.Ref reference, RefAnimation animation = RefAnimation.NONE)
        {
                if (!d_ref_map.has_key(reference))
                {
-                       return;
+                       return false;
                }
 
                var row = d_ref_map[reference];
@@ -751,11 +800,19 @@ public class RefsList : Gtk.ListBox
                                d_header_map.unset(remote);
                        }
                }
+
+               return true;
        }
 
-       public void remove_ref(Gitg.Ref reference)
+       public bool remove_ref(Gitg.Ref reference)
        {
-               remove_ref_internal(reference);
+               if (remove_ref_internal(reference))
+               {
+                       changed();
+                       return true;
+               }
+
+               return false;
        }
 
        private void refresh()
diff --git a/gitg/history/gitg-history.vala b/gitg/history/gitg-history.vala
index 86c1394..0814216 100644
--- a/gitg/history/gitg-history.vala
+++ b/gitg/history/gitg-history.vala
@@ -474,6 +474,19 @@ namespace GitgHistory
                                update_walker();
                        });
 
+                       uint idleupdate = 0;
+
+                       d_main.refs_list.changed.connect(() => {
+                               if (idleupdate == 0)
+                               {
+                                       idleupdate = Idle.add(() => {
+                                               idleupdate = 0;
+                                               update_walker();
+                                               return false;
+                                       });
+                               }
+                       });
+
                        d_commit_list_popup = new Gitg.PopupMenu(d_main.commit_list_view);
                        d_commit_list_popup.populate_menu.connect(on_commit_list_populate_menu);