[gitg] Implemented unstaging of selection

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

commit a1ec2c72dc1b6b6255768b4b660a7f05f340d8ce
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Thu Jan 2 13:29:44 2014 +0100

    Implemented unstaging of selection

 gitg/commit/gitg-commit.vala |   30 ++++++++++++++++++++++++------
 1 files changed, 24 insertions(+), 6 deletions(-)
---
diff --git a/gitg/commit/gitg-commit.vala b/gitg/commit/gitg-commit.vala
index 3744a3f..21598a5 100644
--- a/gitg/commit/gitg-commit.vala
+++ b/gitg/commit/gitg-commit.vala
@@ -733,29 +733,47 @@ namespace GitgCommit
                        }
                }
 
-               private async void stage_selection() throws Error
+               private async void stage_unstage_selection(bool staging) throws Error
                {
                        var selection = yield d_main.diff_view.get_selection();
                        var stage = application.repository.stage;
 
                        foreach (var pset in selection)
                        {
-                               yield stage.stage_patch(pset);
+                               if (staging)
+                               {
+                                       yield stage.stage_patch(pset);
+                               }
+                               else
+                               {
+                                       yield stage.unstage_patch(pset);
+                               }
                        }
                }
 
                private void on_stage_clicked()
                {
-                       stage_selection.begin((obj, res) => {
+                       var staging = d_main.diff_view.unstaged;
+
+                       stage_unstage_selection.begin(staging, (obj, res) => {
                                try
                                {
-                                       stage_selection.end(res);
+                                       stage_unstage_selection.end(res);
                                }
                                catch (Error e)
                                {
-                                       var msg = _("Failed to stage selection");
-                                       application.show_infobar(msg, e.message, Gtk.MessageType.ERROR);
+                                       string msg;
 
+                                       if (staging)
+                                       {
+                                               msg = _("Failed to stage selection");
+                                       }
+                                       else
+                                       {
+                                               msg = _("Failed to unstage selection");
+                                       }
+
+                                       application.show_infobar(msg, e.message, Gtk.MessageType.ERROR);
                                        return;
                                }