[gnome-klotski] Use internal.

[Arnaud B. <arnaudb src gnome org>]

commit 8f0c325c55decb272a148ef5598da0ae0fe5af21
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Wed Feb 5 15:05:13 2020 +0100

    Use internal.

 src/gnome-klotski.vala  |  6 +++---
 src/klotski-window.vala |  6 +++---
 src/puzzle-view.vala    | 10 +++++-----
 src/puzzle.vala         | 37 +++++++++++++++++++------------------
 4 files changed, 30 insertions(+), 29 deletions(-)
---
diff --git a/src/gnome-klotski.vala b/src/gnome-klotski.vala
index ff0e54d..45e27f7 100644
--- a/src/gnome-klotski.vala
+++ b/src/gnome-klotski.vala
@@ -19,7 +19,7 @@
 
 using Gtk;
 
-public class Klotski : Gtk.Application
+private class Klotski : Gtk.Application
 {
     private const OptionEntry [] option_entries =
     {
@@ -39,7 +39,7 @@ public class Klotski : Gtk.Application
     * * Application init
     \*/
 
-    public static int main (string [] args)
+    private static int main (string [] args)
     {
         Intl.setlocale (LocaleCategory.ALL, "");
         Intl.bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
@@ -50,7 +50,7 @@ public class Klotski : Gtk.Application
         return app.run (args);
     }
 
-    public Klotski ()
+    private Klotski ()
     {
         Object (application_id: "org.gnome.Klotski", flags: ApplicationFlags.FLAGS_NONE);
 
diff --git a/src/klotski-window.vala b/src/klotski-window.vala
index 415bca2..701a695 100644
--- a/src/klotski-window.vala
+++ b/src/klotski-window.vala
@@ -30,7 +30,7 @@ private struct LevelInfo
 }
 
 [GtkTemplate (ui = "/org/gnome/Klotski/ui/klotski.ui")]
-public class KlotskiWindow : ApplicationWindow
+private class KlotskiWindow : ApplicationWindow
 {
     /* Settings */
     private GLib.Settings settings;
@@ -512,7 +512,7 @@ public class KlotskiWindow : ApplicationWindow
         category = score_categories[level];
     }
 
-    public KlotskiWindow ()
+    internal KlotskiWindow ()
     {
         var css_provider = new CssProvider ();
         css_provider.load_from_resource ("/org/gnome/Klotski/ui/klotski.css");
@@ -841,7 +841,7 @@ public class KlotskiWindow : ApplicationWindow
         });
     }
 
-    public void show_scores ()
+    internal void show_scores ()
     {
         scores_context.run_dialog ();
     }
diff --git a/src/puzzle-view.vala b/src/puzzle-view.vala
index 3cc922f..605a634 100644
--- a/src/puzzle-view.vala
+++ b/src/puzzle-view.vala
@@ -17,7 +17,7 @@
    with GNOME Klotski.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-public class PuzzleView : Gtk.DrawingArea
+private class PuzzleView : Gtk.DrawingArea
 {
     private const int SPACE_OFFSET = 4;
     private const int SPACE_PADDING = 5;
@@ -49,10 +49,10 @@ public class PuzzleView : Gtk.DrawingArea
     private Cairo.Surface surface = null;
 
     private Puzzle? _puzzle = null;
-    public Puzzle? puzzle
+    internal Puzzle? puzzle
     {
-        get { return _puzzle; }
-        set
+        private  get { return _puzzle; }
+        internal set
         {
             if (_puzzle != null)
                 SignalHandler.disconnect_by_func (_puzzle, null, this);
@@ -77,7 +77,7 @@ public class PuzzleView : Gtk.DrawingArea
         }
     }
 
-    public PuzzleView ()
+    internal PuzzleView ()
     {
         set_size_request (250, 250);    // TODO enough? Taquin is in 350^2
         set_events (Gdk.EventMask.EXPOSURE_MASK | Gdk.EventMask.BUTTON_PRESS_MASK | 
Gdk.EventMask.POINTER_MOTION_MASK | Gdk.EventMask.BUTTON_RELEASE_MASK);
diff --git a/src/puzzle.vala b/src/puzzle.vala
index c2e9015..2dd8ac8 100644
--- a/src/puzzle.vala
+++ b/src/puzzle.vala
@@ -17,7 +17,7 @@
    with GNOME Klotski.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-public class Puzzle : Object
+private class Puzzle : Object
 {
     /*
       1   2   4
@@ -102,21 +102,22 @@ public class Puzzle : Object
         -1,  -1
     };
 
-    public int width;
-    public int height;
+    [CCode (notify = false)] internal int width     { internal get; private set; }
+    [CCode (notify = false)] internal int height    { internal get; private set; }
 
-    public char[] map;
-    public char[] move_map;
-    public char[] orig_map;
-    public char[] lastmove_map;
-    public char[] undomove_map;
+    // Type `char []' can not be used for a GLib.Object property
+    internal char [] map;
+    internal char [] move_map;
+    internal char [] orig_map;
+    internal char [] lastmove_map;
+    internal char [] undomove_map;
 
-    public int moves = 0;
+    [CCode (notify = false)] internal int moves     { internal get; internal set; default = 0; }
 
-    public signal void changed ();
-    public signal void moved ();
+    internal signal void changed ();
+    internal signal void moved ();
 
-    public Puzzle (int width, int height, string? data)
+    internal Puzzle (int width, int height, string? data)
     {
         this.width = width;
         this.height = height;
@@ -139,7 +140,7 @@ public class Puzzle : Object
         lastmove_map = map;
     }
 
-    public char get_piece_id (char[] src, int x, int y)
+    internal char get_piece_id (char[] src, int x, int y)
     {
         return src[x + 1 + (y + 1) * (width + 2)];
     }
@@ -149,7 +150,7 @@ public class Puzzle : Object
         src[x + 1 + (y + 1) * (width + 2)] = id;
     }
 
-    public int get_piece_nr (int x, int y)
+    internal int get_piece_nr (int x, int y)
     {
         x++;
         y++;
@@ -187,7 +188,7 @@ public class Puzzle : Object
         return image_map[i + 1];
     }
 
-    public bool game_over ()
+    internal bool game_over ()
     {
         var over = true;
         for (var y = 0; y < height; y++)
@@ -197,7 +198,7 @@ public class Puzzle : Object
         return over;
     }
 
-    public bool mapcmp (char[] m1, char[] m2)
+    internal bool mapcmp (char[] m1, char[] m2)
     {
         for (var y = 0; y < height; y++)
             for (var x = 0; x < width; x++)
@@ -206,14 +207,14 @@ public class Puzzle : Object
         return false;
     }
 
-    public bool movable (int id)
+    internal bool movable (int id)
     {
         if (id == '#' || id == '.' || id == ' ' || id == '-')
             return false;
         return true;
     }
 
-    public bool move_piece (char id, int x1, int y1, int x2, int y2)
+    internal bool move_piece (char id, int x1, int y1, int x2, int y2)
     {
         var return_value = false;