[gitg/vala] Automatically select branch in history

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

commit eff97b8a1209a876be8908c57c0e730905098be0
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Wed Jul 18 09:35:53 2012 +0200

    Automatically select branch in history

 libgitg/gitg-commit-model.vala    |    1 +
 plugins/history/gitg-history.vala |   42 +++++++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/libgitg/gitg-commit-model.vala b/libgitg/gitg-commit-model.vala
index a0db933..56f679e 100644
--- a/libgitg/gitg-commit-model.vala
+++ b/libgitg/gitg-commit-model.vala
@@ -315,6 +315,7 @@ public class CommitModel : Object
 		try
 		{
 			d_cancellable.reset();
+			emit_started();
 			d_thread = new Thread<void*>.try("gitg-history-walk", run);
 			yield;
 		}
diff --git a/plugins/history/gitg-history.vala b/plugins/history/gitg-history.vala
index 5bb34b9..b82625b 100644
--- a/plugins/history/gitg-history.vala
+++ b/plugins/history/gitg-history.vala
@@ -31,6 +31,8 @@ namespace GitgHistory
 
 		private Gtk.TreeView d_view;
 		private GitgGtk.CommitModel? d_model;
+		private Gee.HashSet<Ggit.OId> d_selected;
+		private ulong d_insertsig;
 
 		private Gtk.Widget d_main;
 
@@ -54,10 +56,47 @@ namespace GitgHistory
 		construct
 		{
 			d_model = new GitgGtk.CommitModel(application.repository);
+			d_selected = new Gee.HashSet<Ggit.OId>(Ggit.OId.hash, (EqualFunc<Ggit.OId>)Ggit.OId.equal);
+
+			d_model.started.connect(on_commit_model_started);
+			d_model.finished.connect(on_commit_model_finished);
 
 			application.bind_property("repository", d_model, "repository", BindingFlags.DEFAULT);
 		}
 
+		private void on_commit_model_started(Gitg.CommitModel model)
+		{
+			if (d_selected.size > 0 && d_insertsig == 0)
+			{
+				d_insertsig = d_model.row_inserted.connect(on_row_inserted_select);
+			}
+		}
+
+		private void on_row_inserted_select(Gtk.TreeModel model, Gtk.TreePath path, Gtk.TreeIter iter)
+		{
+			var commit = d_model.commit_from_path(path);
+
+			if (d_selected.remove(commit.get_id()))
+			{
+				d_view.get_selection().select_path(path);
+
+				if (d_selected.size == 0)
+				{
+					d_model.disconnect(d_insertsig);
+					d_insertsig = 0;
+				}
+			}
+		}
+
+		private void on_commit_model_finished(Gitg.CommitModel model)
+		{
+			if (d_insertsig != 0)
+			{
+				d_model.disconnect(d_insertsig);
+				d_insertsig = 0;
+			}
+		}
+
 		public bool available
 		{
 			get
@@ -164,6 +203,9 @@ namespace GitgHistory
 
 			if (id != null)
 			{
+				d_selected.clear();
+				d_selected.add(id);
+
 				d_model.set_include(new Ggit.OId[] { id });
 			}