Split five-or-more.c The current code existing in five-or-more.c has been split into:

* five-or-more-app.c : Here all  the callbacks to the application are connected,
  followed by the general setting related to the application like background
  color etc. are moved to this file

* game-area.c: Drawing area related code ,say, binding signals to callbacks,
  or rendering the graphics, controlling the animation are handled here.

* balls-preview.c: This has the necessary functions for previewing.

Getters are used to access the static variables used across the appliaction
which weren't currently required since all the code was mash-up into
a single file.

https://bugzilla.gnome.org/show_bug.cgi?id=794273

po/POTFILES.in

@@ -9,3 +9,6 @@ data/org.gnome.five-or-more.gschema.xml
 data/translatable_themes.h
 src/five-or-more.c
 src/games-scores-dialog.c
+src/five-or-more-app.c
+src/game-area.c
+src/balls-preview.c

src/Makefile.am

@@ -2,7 +2,6 @@ bin_PROGRAMS = five-or-more
 
 five_or_more_SOURCES =	\
 	five-or-more.c	\
-	five-or-more.h	\
 	games-file-list.c	\
 	games-file-list.h	\
 	games-gridframe.c	\
@@ -16,7 +15,13 @@ five_or_more_SOURCES =	\
 	games-scores-dialog.c	\
 	games-scores-dialog.h	\
 	games-scores-backend.c	\
-	games-scores-backend.h
+	games-scores-backend.h \
+	five-or-more-app.h \
+	five-or-more-app.c \
+	balls-preview.c \
+	balls-preview.h \
+	game-area.h \
+	game-area.c
 
 five_or_more_CPPFLAGS = \
 	-I$(top_srcdir) \

src/balls-preview.c

+/* -*- mode:C; indent-tabs-mode:t; tab-width:8; c-basic-offset:8; -*- */
+
+/*
+ * Color lines for GNOME
+ * Copyright © 1999 Free Software Foundation
+ * Authors: Robert Szokovacs <szo@appaloosacorp.hu>
+ *          Szabolcs Ban <shooby@gnome.hu>
+ *          Karuna Grewal <karunagrewal98@gmail.com>
+ * Copyright © 2007 Christian Persch
+ *
+ * This game is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <locale.h>
+#include <math.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "games-preimage.h"
+#include "balls-preview.h"
+#include "game-area.h"
+
+#define MAXNPIECES 10
+#define PREVIEW_IMAGE_WIDTH 20
+#define PREVIEW_IMAGE_HEIGHT 20
+
+static GtkImage* preview_images[MAXNPIECES];
+static GdkPixbuf* preview_pixbufs[MAXNPIECES];
+static int preview[MAXNPIECES];
+
+void
+init_preview (void)
+{
+  int i;
+  gint npieces = get_npieces();
+  for (i = 0; i < npieces; i++) {
+    preview[i] = g_rand_int_range (*get_rgen(), 1, get_ncolors() + 1);
+  }
+}
+
+void
+draw_preview (void)
+{
+  guint i;
+  gint npieces = get_npieces();
+  /* This function can be called before the images are initialized */
+  if (!GTK_IS_IMAGE (preview_images[0]))
+    return;
+
+  for (i = 0; i < MAXNPIECES; i++) {
+    if (i < npieces)
+      gtk_image_set_from_pixbuf (preview_images[i], preview_pixbufs[preview[i] - 1]);
+    else
+      gtk_image_clear (preview_images[i]);
+  }
+}
+
+void
+refresh_preview_surfaces (void)
+{
+  guint i;
+  GdkPixbuf *scaled = NULL;
+  GtkWidget *widget = GTK_WIDGET (preview_images[0]);
+  GtkStyleContext *context;
+  GdkRGBA bg;
+  cairo_t *cr;
+  GdkRectangle preview_rect;
+  cairo_surface_t *blank_preview_surface = NULL;
+  /* The balls rendered to a size appropriate for the preview. */
+  cairo_surface_t *preview_surface = NULL;
+
+  context = gtk_widget_get_style_context (widget);
+  gtk_style_context_get_background_color (context, gtk_style_context_get_state (context), &bg);
+
+  /* Like the refresh_pixmaps() function, we may be called before
+   * the window is ready. */
+  if (PREVIEW_IMAGE_HEIGHT == 0)
+    return;
+
+  preview_rect.x = 0;
+  preview_rect.y = 0;
+  preview_rect.width = PREVIEW_IMAGE_WIDTH;
+  preview_rect.height = PREVIEW_IMAGE_HEIGHT;
+
+  /* We create pixmaps for each of the ball colours and then
+   * set them as the background for each widget in the preview array.
+   * This code assumes that each preview window is identical. */
+  GamesPreimage *ball_preimage = get_ball_preimage();
+  if (ball_preimage)
+    scaled = games_preimage_render (ball_preimage, 4 * PREVIEW_IMAGE_WIDTH,
+                                    7 * PREVIEW_IMAGE_HEIGHT);
+
+  if (!scaled) {
+    scaled = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
+                             4 * PREVIEW_IMAGE_WIDTH, 7 * PREVIEW_IMAGE_HEIGHT);
+    gdk_pixbuf_fill (scaled, 0x00000000);
+  }
+
+  for (i = 0; i < 7; i++) {
+    preview_surface = gdk_window_create_similar_image_surface (gtk_widget_get_window (widget),
+                                                               CAIRO_FORMAT_ARGB32,
+                                                               PREVIEW_IMAGE_WIDTH, PREVIEW_IMAGE_HEIGHT, 1);
+    cr = cairo_create (preview_surface);
+    gdk_cairo_set_source_rgba (cr, &bg);
+    gdk_cairo_rectangle (cr, &preview_rect);
+    cairo_fill (cr);
+
+    gdk_cairo_set_source_pixbuf (cr, scaled, 0, -1.0 * PREVIEW_IMAGE_HEIGHT * i);
+    cairo_mask (cr, cairo_get_source (cr));
+
+    if (preview_pixbufs[i])
+      g_object_unref (preview_pixbufs[i]);
+
+    preview_pixbufs[i] = gdk_pixbuf_get_from_surface (preview_surface, 0, 0,
+                                                      PREVIEW_IMAGE_WIDTH, PREVIEW_IMAGE_HEIGHT);
+
+    cairo_destroy (cr);
+    cairo_surface_destroy (preview_surface);
+  }
+
+  blank_preview_surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
+                                                             CAIRO_CONTENT_COLOR_ALPHA,
+                                                             PREVIEW_IMAGE_WIDTH, PREVIEW_IMAGE_HEIGHT);
+  cr = cairo_create (blank_preview_surface);
+  gdk_cairo_set_source_rgba (cr, &bg);
+  gdk_cairo_rectangle (cr, &preview_rect);
+  cairo_fill (cr);
+
+  cairo_surface_destroy (blank_preview_surface);
+  cairo_destroy (cr);
+  g_object_unref (scaled);
+}
+
+GtkImage **
+get_preview_images()
+{
+  return preview_images;
+}
+
+int *
+get_preview()
+{
+  return preview;
+}
+
+GdkPixbuf **
+get_preview_pixbufs()
+{
+  return preview_pixbufs;
+}
\ No newline at end of file

src/balls-preview.h

+/*
+ * Color lines for GNOME
+ * Copyright © 1999 Free Software Foundation
+ * Authors: Robert Szokovacs <szo@appaloosacorp.hu>
+ *          Szabolcs Ban <shooby@gnome.hu>
+ *          Karuna Grewal <karunagrewal98@gmail.com>
+ * Copyright © 2007 Christian Persch
+ *
+ * This game is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef BALLS_PREVIEW_H
+#define BALLS_PREVIEW_H
+
+#include <gtk/gtk.h>
+
+void        init_preview             (void);
+void        draw_preview             (void);
+void        refresh_preview_surfaces (void);
+GtkImage  **get_preview_images       ();
+int       * get_preview              ();
+GdkPixbuf **get_preview_pixbufs      ();
+
+#endif
\ No newline at end of file

src/five-or-more-app.h

+/*
+ * Color lines for GNOME
+ * Copyright © 1999 Free Software Foundation
+ * Authors: Robert Szokovacs <szo@appaloosacorp.hu>
+ *          Szabolcs Ban <shooby@gnome.hu>
+ *          Karuna Grewal <karunagrewal98@gmail.com>
+ * Copyright © 2007 Christian Persch
+ *
+ * This game is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef FIVE_OR_MORE_APP_H
+#define FIVE_OR_MORE_APP_H
+
+#include <gtk/gtk.h>
+#include "games-scores.h"
+
+typedef struct _background background;
+struct _background{
+  GdkRGBA color;
+  gchar *name;
+  gint set;
+} ;
+
+GamesScores                 *get_highscores             ();
+GtkWidget                   *get_gridframe              ();
+char                        *get_ball_filename          ();
+background                   get_backgnd                ();
+void                         set_status_message         (gchar * message);
+void                         game_over                  (void);
+void                         set_application_callbacks  (GtkApplication *application);
+gint                        *get_game_size              ();
+const GamesScoresCategory   *get_scorecats              ();
+GSettings                  **get_settings               ();
+int                          get_move_timeout           ();
+void                         game_props_callback        (GSimpleAction *action,
+                                                         GVariant *parameter,
+                                                         gpointer user_data);
+void                         update_score               (guint value);
+#endif
\ No newline at end of file

src/five-or-more.h

-#ifndef glines_h
-#define glines_h
-
-#define STEPSIZE 4
-
-typedef struct {
-  int num;
-  int score;
-} scoretable;
-
-typedef struct {
-  int color;
-  int pathsearch;
-  int phase;
-  int active;
-  int tag;
-} field_props;
-
-void draw_box (GtkWidget * widget, int x, int y);
-
-void draw_ball (GtkWidget * widget, int x, int y);
-
-int find_route (void);
-
-void set_inmove (int i);
-
-void init_preview (void);
-
-void draw_preview (void);
-
-int init_new_balls (int num, int prev);
-
-gint animate (gpointer gp);
-
-
-void game_new_callback (GSimpleAction *action,
-                        GVariant *parameter,
-                        gpointer user_data);
-void game_top_ten_callback (GSimpleAction *action,
-                            GVariant *parameter,
-                            gpointer user_data);
-void game_quit_callback (GSimpleAction *action,
-                        GVariant *parameter,
-                        gpointer user_data);
-void game_props_callback (GSimpleAction *action,
-                          GVariant *parameter,
-                          gpointer user_data);
-void game_help_callback (GSimpleAction *action,
-                         GVariant *parameter,
-                         gpointer user_data);
-void game_about_callback (GSimpleAction *action,
-                          GVariant *parameter,
-                          gpointer user_data);
-
-void pref_dialog_response (GtkDialog * dialog, gint response, gpointer data);
-
-#endif

src/game-area.h

+/*
+ * Color lines for GNOME
+ * Copyright © 1999 Free Software Foundation
+ * Authors: Robert Szokovacs <szo@appaloosacorp.hu>
+ *          Szabolcs Ban <shooby@gnome.hu>
+ *          Karuna Grewal <karunagrewal98@gmail.com>
+ * Copyright © 2007 Christian Persch
+ *
+ * This game is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef GAME_AREA_H
+#define GAME_AREA_H
+
+#include <gtk/gtk.h>
+#include "games-preimage.h"
+
+typedef struct {
+  int num;
+  int score;
+} scoretable;
+
+typedef struct {
+  int color;
+  int pathsearch;
+  int phase;
+  int active;
+  int tag;
+} field_props;
+
+GRand           **get_rgen          ();
+GamesPreimage    *get_ball_preimage ();
+gint              get_npieces       ();
+void              set_inmove        (int i);
+void              refresh_pixmaps   (void);
+void              refresh_screen    (void);
+void              load_theme        (void);
+GtkWidget       * game_area_init    (void);
+gint              get_ncolors       ();
+void              set_sizes         (gint size);
+void              reset_game        (void);
+gint              get_hfieldsize    ();
+gint              get_vfieldsize    ();
+#endif
\ No newline at end of file

src/meson.build

@@ -3,6 +3,12 @@
 five_or_more_c_sources = [
 	'five-or-more.c',
 	'five-or-more.h',
+	'game-area.h',
+	'game-area.c',
+	'five-or-more-app.c',
+	'five-or-more-app.h',
+	'balls-preview.c',
+	'balls-preview.h',
 	'games-file-list.c',
 	'games-file-list.h',
 	'games-gridframe.c',