[gitg] diff-view-file: show a hand when hovering a hunk

[Ignacio Casal Quinteiro <icq src gnome org>]

commit dec5aed9f790fe960166cbc14427028af5435ee0
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Sat Dec 19 11:46:59 2015 +0100

    diff-view-file: show a hand when hovering a hunk

 libgitg/gitg-diff-view-file.vala |   31 ++++++++++++++++++++++++-------
 1 files changed, 24 insertions(+), 7 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file.vala b/libgitg/gitg-diff-view-file.vala
index 1cf1d1c..b60c3e2 100644
--- a/libgitg/gitg-diff-view-file.vala
+++ b/libgitg/gitg-diff-view-file.vala
@@ -155,8 +155,12 @@ class Gitg.DiffViewFile : Gtk.Grid
 
                        d_sourceview_hunks.get_style_context().add_class("handle-selection");
 
-                       d_sourceview_hunks.realize.connect(update_cursor);
-                       d_sourceview_hunks.notify["state-flags"].connect(update_cursor);
+                       d_sourceview_hunks.realize.connect(() => {
+                               update_cursor(Gdk.CursorType.LEFT_PTR);
+                       });
+                       d_sourceview_hunks.notify["state-flags"].connect(() => {
+                               update_cursor(Gdk.CursorType.LEFT_PTR);
+                       });
                }
 
                d_sourceview_hunks.set_border_window_size(Gtk.TextWindowType.TOP, 1);
@@ -166,7 +170,7 @@ class Gitg.DiffViewFile : Gtk.Grid
                update_theme();
        }
 
-       private void update_cursor()
+       private void update_cursor(Gdk.CursorType type)
        {
                var window = d_sourceview_hunks.get_window(Gtk.TextWindowType.TEXT);
 
@@ -175,7 +179,7 @@ class Gitg.DiffViewFile : Gtk.Grid
                        return;
                }
 
-               var cursor = new Gdk.Cursor.for_display(d_sourceview_hunks.get_display(), 
Gdk.CursorType.LEFT_PTR);
+               var cursor = new Gdk.Cursor.for_display(d_sourceview_hunks.get_display(), type);
                window.set_cursor(cursor);
        }
 
@@ -232,6 +236,17 @@ class Gitg.DiffViewFile : Gtk.Grid
                       (buffer.get_source_marks_at_iter(start, "removed") != null);
        }
 
+       private bool get_line_is_hunk(Gtk.TextIter iter)
+       {
+               var text_view = d_sourceview_hunks as Gtk.TextView;
+               Gtk.TextIter start = iter;
+
+               start.set_line_offset(0);
+               var buffer = text_view.get_buffer() as Gtk.SourceBuffer;
+
+               return buffer.get_source_marks_at_iter(start, "header") != null;
+       }
+
        private bool get_iter_from_pointer_position(out Gtk.TextIter iter)
        {
                var text_view = d_sourceview_hunks as Gtk.TextView;
@@ -336,13 +351,15 @@ class Gitg.DiffViewFile : Gtk.Grid
 
        private bool motion_notify_event_on_view(Gdk.EventMotion event)
        {
-               if (!d_is_selecting && !d_is_deselecting)
+               Gtk.TextIter iter;
+               if (!get_iter_from_pointer_position(out iter))
                {
                        return false;
                }
 
-               Gtk.TextIter iter;
-               if (!get_iter_from_pointer_position(out iter))
+               update_cursor(get_line_is_hunk(iter) ? Gdk.CursorType.HAND1 : Gdk.CursorType.LEFT_PTR);
+
+               if (!d_is_selecting && !d_is_deselecting)
                {
                        return false;
                }