[gitg] Factor out get_diff method

[Ignacio Casal Quinteiro <icq src gnome org>]

commit cba6d104ca71d885c013d7eb1868ce461d8d1f66
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Thu Feb 21 17:41:25 2013 +0100

    Factor out get_diff method

 libgitg-gtk/gitg-gtk-diff-view.vala |   37 ++-------------------------------
 libgitg/gitg-commit.vala            |   38 +++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 34 deletions(-)
---
diff --git a/libgitg-gtk/gitg-gtk-diff-view.vala b/libgitg-gtk/gitg-gtk-diff-view.vala
index f97974a..fd553c4 100644
--- a/libgitg-gtk/gitg-gtk-diff-view.vala
+++ b/libgitg-gtk/gitg-gtk-diff-view.vala
@@ -22,7 +22,7 @@ namespace GitgGtk
        public class DiffView : WebKit.WebView
        {
                private Ggit.Diff? d_diff;
-               private Ggit.Commit? d_commit;
+               private Gitg.Commit? d_commit;
                private Settings d_fontsettings;
 
                private static Gee.HashMap<string, GitgGtk.DiffView> s_diffmap;
@@ -47,7 +47,7 @@ namespace GitgGtk
                        }
                }
 
-               public Ggit.Commit? commit
+               public Gitg.Commit? commit
                {
                        get { return d_commit; }
                        set
@@ -258,38 +258,7 @@ namespace GitgGtk
 
                        if (d_commit != null)
                        {
-                               d_diff = null;
-
-                               var repo = d_commit.get_owner();
-
-                               try
-                               {
-                                       var parents = d_commit.get_parents();
-
-                                       // Create a new diff from the parents to the commit tree
-                                       for (var i = 0; i < parents.size(); ++i)
-                                       {
-                                               var parent = parents.get(0);
-
-                                               if (i == 0)
-                                               {
-                                                       d_diff = new Ggit.Diff.tree_to_tree(repo,
-                                                                                           parent.get_tree(),
-                                                                                           
d_commit.get_tree(),
-                                                                                           options);
-                                               }
-                                               else
-                                               {
-                                                       var d = new Ggit.Diff.tree_to_tree(repo,
-                                                                                          parent.get_tree(),
-                                                                                          
d_commit.get_tree(),
-                                                                                          options);
-
-                                                       d_diff.merge(d);
-                                               }
-                                       }
-                               }
-                               catch {}
+                               d_diff = d_commit.get_diff(options);
                        }
 
                        if (d_diff != null)
diff --git a/libgitg/gitg-commit.vala b/libgitg/gitg-commit.vala
index 569d315..79de9e8 100644
--- a/libgitg/gitg-commit.vala
+++ b/libgitg/gitg-commit.vala
@@ -113,6 +113,44 @@ public class Commit : Ggit.Commit
                        return date_for_display(get_author().get_time());
                }
        }
+
+       public Ggit.Diff get_diff(Ggit.DiffOptions? options)
+       {
+               Ggit.Diff? diff = null;
+
+               var repo = get_owner();
+
+               try
+               {
+                       var parents = get_parents();
+
+                       // Create a new diff from the parents to the commit tree
+                       for (var i = 0; i < parents.size(); ++i)
+                       {
+                               var parent = parents.get(0);
+
+                               if (i == 0)
+                               {
+                                       diff = new Ggit.Diff.tree_to_tree(repo,
+                                                                         parent.get_tree(),
+                                                                         get_tree(),
+                                                                         options);
+                               }
+                               else
+                               {
+                                       var d = new Ggit.Diff.tree_to_tree(repo,
+                                                                          parent.get_tree(),
+                                                                          get_tree(),
+                                                                          options);
+
+                                       diff.merge(d);
+                               }
+                       }
+               }
+               catch {}
+
+               return diff;
+       }
 }
 
 }