[gitg] Update selection on enter/leave events

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

commit 4192eb5f8ccd86ac5d758e2976593f94747a7949
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Mon Dec 21 07:55:09 2015 +0100

    Update selection on enter/leave events

 libgitg/gitg-diff-view-file-selectable.vala |   28 ++++++++++++++++++++++++--
 1 files changed, 25 insertions(+), 3 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file-selectable.vala b/libgitg/gitg-diff-view-file-selectable.vala
index f257fbd..b901be3 100644
--- a/libgitg/gitg-diff-view-file-selectable.vala
+++ b/libgitg/gitg-diff-view-file-selectable.vala
@@ -75,6 +75,8 @@ class Gitg.DiffViewFileSelectable : Object
        {
                source_view.button_press_event.connect(button_press_event_on_view);
                source_view.motion_notify_event.connect(motion_notify_event_on_view);
+               source_view.leave_notify_event.connect(leave_notify_event_on_view);
+               source_view.enter_notify_event.connect(enter_notify_event_on_view);
                source_view.button_release_event.connect(button_release_event_on_view);
 
                source_view.realize.connect(() => {
@@ -293,6 +295,11 @@ class Gitg.DiffViewFileSelectable : Object
                        return false;
                }
 
+               return get_iter_from_event_position(out iter, x, y);
+       }
+
+       private bool get_iter_from_event_position(out Gtk.TextIter iter, int x, int y)
+       {
                int win_x, win_y;
 
                source_view.window_to_buffer_coords(Gtk.TextWindowType.TEXT, x, y, out win_x, out win_y);
@@ -470,16 +477,16 @@ class Gitg.DiffViewFileSelectable : Object
                buffer.move_mark(d_end_selection_mark, cursor);
        }
 
-       private bool motion_notify_event_on_view(Gdk.EventMotion event)
+       private bool update_selection_event(Gdk.ModifierType state, int x, int y)
        {
                Gtk.TextIter iter;
 
-               if (!get_iter_from_pointer_position(out iter))
+               if (!get_iter_from_event_position(out iter, x, y))
                {
                        return false;
                }
 
-               update_cursor_for_state(event.state);
+               update_cursor_for_state(state);
 
                if (d_selection_mode == DiffSelectionMode.NONE)
                {
@@ -490,6 +497,21 @@ class Gitg.DiffViewFileSelectable : Object
                return true;
        }
 
+       private bool motion_notify_event_on_view(Gdk.EventMotion event)
+       {
+               return update_selection_event(event.state, (int)event.x, (int)event.y);
+       }
+
+       private bool leave_notify_event_on_view(Gdk.EventCrossing event)
+       {
+               return update_selection_event(event.state, (int)event.x, (int)event.y);
+       }
+
+       private bool enter_notify_event_on_view(Gdk.EventCrossing event)
+       {
+               return update_selection_event(event.state, (int)event.x, (int)event.y);
+       }
+
        private void update_has_selection()
        {
                var buffer = source_view.buffer;