[gitg] Fixed RTL rendering for GitgDiffStat

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

commit c95c7cfd1ec0fb8610c9fa0e3e6dfa0813480217
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Sun Jan 5 13:20:58 2014 +0100

    Fixed RTL rendering for GitgDiffStat

 libgitg/gitg-diff-stat.vala |   38 ++++++++++++++++++++++++++++++++++----
 1 files changed, 34 insertions(+), 4 deletions(-)
---
diff --git a/libgitg/gitg-diff-stat.vala b/libgitg/gitg-diff-stat.vala
index aacb167..83a4e24 100644
--- a/libgitg/gitg-diff-stat.vala
+++ b/libgitg/gitg-diff-stat.vala
@@ -80,11 +80,19 @@ public class Gitg.DiffStat : Gtk.DrawingArea
                                border-radius: 3px 0px 0px 3px;
                        }
 
+                       GitgDiffStat added:dir(rtl) {
+                               border-radius: 0px 3px 3px 0px;
+                       }
+
                        GitgDiffStat removed {
                                background-color: #cc3333;
                                border-radius: 0px 3px 3px 0px;
                        }
 
+                       GitgDiffStat removed:dir(rtl) {
+                               border-radius: 3px 0px 0px 3px;
+                       }
+
                        GitgDiffStat removed:only-child,
                        GitgDiffStat added:only-child {
                                border-radius: 3px;
@@ -163,8 +171,20 @@ public class Gitg.DiffStat : Gtk.DrawingArea
                Pango.Rectangle rect;
                d_layout.get_extents(null, out rect);
 
+               var rtl = (sctx.get_state() & Gtk.StateFlags.DIR_RTL) != 0;
+               int x;
+
+               if (!rtl)
+               {
+                       x = padding.left + border.left + rect.x / Pango.SCALE;
+               }
+               else
+               {
+                       x = w - padding.right - border.right - rect.width / Pango.SCALE;
+               }
+
                sctx.render_layout(context,
-                                  padding.left + border.left + rect.x / Pango.SCALE,
+                                  x,
                                   (h - rect.height / Pango.SCALE) / 2 + rect.y / Pango.SCALE,
                                   d_layout);
 
@@ -172,7 +192,6 @@ public class Gitg.DiffStat : Gtk.DrawingArea
                sctx.get_style("bar-height", out hbar);
                var ybar = (h - hbar) / 2;
 
-               var xbar = padding.left * 2 + border.left + (rect.x + rect.width) / Pango.SCALE;
                var wrest = (int)(w - padding.left * 2 - (rect.x + rect.width) / Pango.SCALE - padding.right 
- border.left - border.right);
 
                double afrac = 0;
@@ -185,22 +204,33 @@ public class Gitg.DiffStat : Gtk.DrawingArea
 
                var wbar = (int)(wrest * afrac);
 
+               if (!rtl)
+               {
+                       x += padding.left + rect.width / Pango.SCALE;
+               }
+               else
+               {
+                       x -= padding.right + wbar;
+               }
+
                sctx.save();
                sctx.add_region("added",
                                Gtk.RegionFlags.FIRST |
                                (removed == 0 ? Gtk.RegionFlags.ONLY : 0));
 
-               sctx.render_background(context, xbar, ybar, wbar, hbar);
+               sctx.render_background(context, x, ybar, wbar, hbar);
 
                sctx.restore();
                sctx.save();
 
+               x += rtl ? (wbar - wrest) : wbar;
+
                sctx.add_region("removed",
                                Gtk.RegionFlags.LAST |
                                (added == 0 ? Gtk.RegionFlags.ONLY : 0));
 
                sctx.render_background(context,
-                                      xbar + wbar,
+                                      x,
                                       ybar,
                                       wrest - wbar,
                                       hbar);