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/*
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This is a plug-in for the GIMP.
 *
 * Generates images containing vector type drawings.
 *
 * Copyright (C) 1997 Andy Thomas  alt@picnic.demon.co.uk
 *
 * This program 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 of the License, 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, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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 * 
 * Some of this code was taken from the Whirl plug-in
 * which was copyrighted by Federico Mena Quintero (as below).
 * 
 * Whirl plug-in --- distort an image into a whirlpool
 * Copyright (C) 1997 Federico Mena Quintero           
 *
 */

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/* Change log:
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 * 0.9 First public release. 
 * 0.95 Second release.
 * 
 * 0.96 Added patch from  Rob Saunders that introduces a isometric type grid
 *      Removed use of gtk_idle* stuff on position update. Not required.
 *
 * 1.0  Fixed to work with the new gtk+-0.99.4 (tooltips stuff has changed).  
 * 
 * 1.1  Fixed crashes when objects not fully defined
 * 
 * 1.2  More bug fixes and prevent gtk warning when creating new figs
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 * 
 * 1.3  Portability fixes and fixed bug reports 257 and 258 from and 81 & 101 & 133
 *      http://www.wilberworks.com/bugs.cgi
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 */

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#include "config.h"

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#include <glib.h>

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#include <stdio.h>
#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <string.h>
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#ifdef HAVE_DIRENT_H
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#include <dirent.h>
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#endif
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#include <ctype.h>
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#include <gtk/gtk.h>
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#ifdef G_OS_WIN32
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#  include <io.h>
#  ifndef W_OK
#    define W_OK 2
#  endif
#  ifndef S_ISDIR
#    define S_ISDIR(m) ((m) & _S_IFDIR)
#  endif
#  ifndef S_ISREG
#    define S_ISREG(m) ((m) & _S_IFREG)
#  endif
#endif

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#if defined (GTK_CHECK_VERSION) && GTK_CHECK_VERSION (1,3,0)
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#define gdk_root_parent (*gdk_parent_root)
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#endif

#ifdef G_OS_WIN32
extern __declspec(dllimport) void *gdk_root_parent;
#else
extern void * gdk_root_parent;
#endif

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#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
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#include "libgimp/stdplugins-intl.h"

#include "pix_data.h"
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/***** Magic numbers *****/

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#define PREVIEW_SIZE 400
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#define SCALE_WIDTH  120

#define MIN_GRID 10
#define MAX_GRID 50
#define MAX_UNDO 10
#define MIN_UNDO 1
#define MAX_LOAD_LINE 256
#define SMALL_PREVIEW_SZ 48
#define BRUSH_PREVIEW_SZ 32
#define GFIG_HEADER "GFIG Version 0.1\n"

#define PREVIEW_MASK   GDK_EXPOSURE_MASK | \
                       GDK_MOTION_NOTIFY | \
		       GDK_POINTER_MOTION_MASK | \
                       GDK_BUTTON_PRESS_MASK | \
		       GDK_BUTTON_RELEASE_MASK | \
		       GDK_BUTTON_MOTION_MASK | \
		       GDK_KEY_PRESS_MASK | \
		       GDK_KEY_RELEASE_MASK 

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static GDrawable *gfig_select_drawable;
static GtkWidget *gfig_preview;
static GtkWidget *pic_preview;
static GtkWidget *gfig_gtk_list;
static gint       gfig_preview_exp_id;
static gint32     gfig_image;
static gint32     gfig_drawable;
static GtkWidget *brush_page_pw;
static GtkWidget *brush_sel_button;
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static gint   tile_width, tile_height;
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static gint   img_width, img_height, img_bpp, real_img_bpp;
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static void      query  (void);
static void      run    (gchar    *name,
			 gint      nparams,
			 GParam   *param,
			 gint     *nreturn_vals,
			 GParam  **return_vals);
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static gint      gfig_dialog               (void);
static void      gfig_clear_selection      (gint32 ID);
static void      gfig_ok_callback          (GtkWidget *widget,
					    gpointer   data);
static void      gfig_paint_callback       (GtkWidget *widget,
					    gpointer   data);
static void      gfig_clear_callback       (GtkWidget *widget,
					    gpointer   data);
static void      gfig_undo_callback        (GtkWidget *widget,
					    gpointer   data);
static gint      gfig_preview_expose       (GtkWidget *widget,
					    GdkEvent  *event);
static gint      pic_preview_expose        (GtkWidget *widget,
					    GdkEvent  *event);
static gint      gfig_preview_events       (GtkWidget *widget,
					    GdkEvent  *event);
static gint      gfig_brush_preview_events (GtkWidget *widget,
					    GdkEvent  *event);

static void      gfig_scale_update_scale   (GtkAdjustment *adjustment,
					    gdouble       *value);

static void      gfig_scale2img_update     (GtkWidget *widget,
					    gpointer   data);

static gint      gfig_scale_x              (gint       x);
static gint      gfig_scale_y              (gint       y);
static gint      gfig_invscale_x           (gint       x);
static gint      gfig_invscale_y           (gint       y);
static GdkGC *   gfig_get_grid_gc          (GtkWidget *widget,
					    gint       gctype);
static void      gfig_pos_enable           (GtkWidget *widget,
					    gpointer   data);

static gint      list_button_press         (GtkWidget      *widget,
					    GdkEventButton *event,
					    gpointer        data);

static void      rescan_button_callback    (GtkWidget *widget,
					    gpointer   data);
static void      load_button_callback      (GtkWidget *widget,
					    gpointer   data);
static void      save_button_callback      (GtkWidget *widget,
					    gpointer   data);
static void      new_button_callback       (GtkWidget *widget,
					    gpointer   data);
static void   gfig_do_delete_gfig_callback (GtkWidget *widget,
					    gboolean   delete,
					    gpointer   data);
static void      gfig_delete_gfig_callback (GtkWidget *widget,
					    gpointer   data);
static void      edit_button_callback      (GtkWidget *widget,
					    gpointer   data);
static void      merge_button_callback     (GtkWidget *widget,
					    gpointer   data);
static void      about_button_callback     (GtkWidget *widget,
					    gpointer   data);
static void      reload_button_callback    (GtkWidget *widget,
					    gpointer   data);

static void      do_gfig                   (void);
static void      dialog_update_preview     (void);

static void      draw_grid_clear           (GtkWidget *widget,
					    gpointer   data);
static void      toggle_show_image         (GtkWidget *widget,
					    gpointer   data);
static void      toggle_tooltips           (GtkWidget *widget,
					    gpointer   data);
static void      toggle_obj_type           (GtkWidget *widget,
					    gpointer   data);
static void      draw_grid                 (GtkWidget *widget,
					    gpointer   data);

static void      gfig_new_gc               (void);
static void      find_grid_pos             (GdkPoint  *p,
					    GdkPoint  *gp,
					    guint      state);

static void      brush_list_button_callback (GtkWidget *widget,
					     gpointer   data);
static gint      calculate_point_to_line_distance (GdkPoint *p,
						   GdkPoint *A,
						   GdkPoint *B,
						   GdkPoint *I);
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GPlugInInfo PLUG_IN_INFO =
{
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  NULL,  /* init_proc  */
  NULL,  /* quit_proc  */
  query, /* query_proc */
  run,   /* run_proc   */
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};

/* The types of an object */
/* Also includes actions that can be performed on objects */

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typedef enum
{
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  LINE,
  CIRCLE,
  ELLIPSE,
  ARC,
  POLY,
  STAR,
  SPIRAL,
  BEZIER,
  MOVE_OBJ,
  MOVE_POINT,
  COPY_OBJ,
  MOVE_COPY_OBJ,
  DEL_OBJ,
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  NULL_OPER
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} DobjType;
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typedef enum
{
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  RECT_GRID = 0,
  POLAR_GRID,
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  ISO_GRID
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} GridType;
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typedef enum
{
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  SINGLE_LAYER = 0,
  ORIGINAL_LAYER,
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  MULTI_LAYER
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} DrawonLayers;
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typedef enum
{
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  LAYER_TRANS_BG = 0,
  LAYER_BG_BG,
  LAYER_WHITE_BG,
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  LAYER_COPY_BG
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} LayersBGType;
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typedef enum
{
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  PAINT_BRUSH_TYPE = 0,
  PAINT_SELECTION_TYPE,
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  PAINT_SELECTION_FILL_TYPE
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} PaintType;
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typedef enum
{
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  BRUSH_BRUSH_TYPE = 0,
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  BRUSH_PENCIL_TYPE,
  BRUSH_AIRBRUSH_TYPE,
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  BRUSH_PATTERN_TYPE
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} BrushType;
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#define GRID_TYPE_MENU 1
#define GRID_RENDER_MENU 2
#define GRID_IGNORE 0 
#define GRID_HIGHTLIGHT 1
#define GRID_RESTORE 2

#define GFIG_BLACK_GC -2
#define GFIG_WHITE_GC -3
#define GFIG_GREY_GC -4

#define PAINT_LAYERS_MENU 1
#define PAINT_BGS_MENU 2
#define PAINT_TYPE_MENU 3

#define SELECT_TYPE_MENU 1
#define SELECT_ARCTYPE_MENU 2
#define SELECT_TYPE_MENU_FILL 3
#define SELECT_TYPE_MENU_WHEN 4

#define OBJ_SELECT_GT 1
#define OBJ_SELECT_LT 2
#define OBJ_SELECT_EQ 4


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typedef struct
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{
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  gint     gridspacing;
  GridType gridtype;
  gint     drawgrid;
  gint     snap2grid;
  gint     lockongrid;
  gint     showcontrol;
} GfigOpts;
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/* Must keep in step with the above */
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typedef struct
{
  void      *gridspacing;
  GtkWidget *gridtypemenu;
  GtkWidget *drawgrid;
  GtkWidget *snap2grid;
  GtkWidget *lockongrid;
  GtkWidget *showcontrol;
} GfigOptWidgets;

static GfigOptWidgets gfig_opt_widget;

typedef struct
{
  GfigOpts      opts;
  gint          showimage;
  gint          maxundo;
  gint          showpos;
  gdouble       brushfade;
  gdouble       airbrushpressure;
  gint          showtooltips;
  DrawonLayers  onlayers;
  LayersBGType  onlayerbg;
  PaintType     painttype;
  gint          reverselines;
  gint          scaletoimage;
  gdouble       scaletoimagefp;
  gint          approxcircles;
  BrushType    brshtype;
  DobjType      otype;
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} SelectItVals;

/* Values when first invoked */
static SelectItVals selvals =
{
  {
    MIN_GRID + (MAX_GRID - MIN_GRID)/2, /* Gridspacing */
    RECT_GRID, /* Default to rectangle type */
    0,  /* drawgrid */
    0,  /* snap2grid */
    0,  /* lockongrid */
    1,  /* show control points */
  },
  0,  /* show image */
  MIN_UNDO + (MAX_UNDO - MIN_UNDO)/2,  /* Max level of undos */
  FALSE, /* Show pos updates */
  0.0, /* Brush fade */
  20.0, /* Air bursh pressure */
  TRUE,  /* show Tool tips */
  ORIGINAL_LAYER, /* Draw all objects on one layer */
  LAYER_TRANS_BG, /* New layers background */
  PAINT_BRUSH_TYPE, /* Default to use brushes */
  FALSE, /* reverse lines */
  TRUE, /* Scale to image when painting */
  1.0, /* Scale to image fp */
  FALSE, /* Approx circles by drawing lines */
  BRUSH_BRUSH_TYPE, /* Default to use a brush */
  LINE /* Initial object type */
};

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typedef enum
{
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  ADD=0,
  SUBTRACT=1,
  REPLACE=2,
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  INTERSECT=3
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} SelectionType;
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typedef enum
{
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  ARC_SEGMENT,
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  ARC_SECTOR
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} ArcType;
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typedef enum
{
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  FILL_FOREGROUND = 0,
  FILL_BACKGROUND = 1,
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  FILL_PATTERN = 2
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} FillType;
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typedef enum
{
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  FILL_EACH = 0,
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  FILL_AFTER
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} FillWhen;
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struct selection_option
{
  SelectionType type; /* ADD etc .. */
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  gint antia; /* Boolean for Antia */
  gint feather; /* Feather it ? */
  gdouble feather_radius; /* Radius to feather */
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  ArcType as_pie; /* Arc type selection segment/sector */
  FillType fill_type; /* Fill type for selection */
  FillWhen fill_when; /* Fill on each selection or after all? */
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  gdouble fill_opacity; /* You can guess this one */
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} selopt =
{
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  ADD, /* type */
  FALSE, /* Antia */
  FALSE, /* Feather */
  10.0, /* feather radius */
  ARC_SEGMENT,  /* Arc as a segment */
  FILL_PATTERN, /* Fill as pattern */
  FILL_EACH, /* Fill after each selection */
  100.0, /* Max opacity */
};


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static GList *gfig_path_list = NULL;
static GList *gfig_list      = NULL;
static gint   line_no;
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static gint poly_num_sides    = 3; /* Default to three sided object */
static gint star_num_sides    = 3; /* Default to three sided object */
static gint spiral_num_turns  = 4; /* Default to 4 turns */
static gint spiral_toggle     = 0; /* 0 = clockwise -1 = anti-clockwise */
static gint bezier_closed     = 0; /* Closed curve 0 = false 1 = true */
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static gint bezier_line_frame = 0; /* Show frame = false 1 = true */

static gint obj_show_single = -1; /* -1 all >= 0 object number */

/* Structures etc for the objects */
/* Points used to draw the object  */

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typedef struct DobjPoints
{
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  struct DobjPoints * next;
  GdkPoint pnt;
  gint found_me;
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} DobjPoints;
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struct Dobject; /* fwd declaration for DobjFunc */
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typedef void            (*DobjFunc) (struct Dobject *);
typedef struct Dobject *(*DobjGenFunc) (struct Dobject *);
typedef struct Dobject *(*DobjLoadFunc) (FILE *);
typedef void            (*DobjSaveFunc) (struct Dobject *, FILE *);
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/* The object itself */
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typedef struct Dobject
{
  DobjType      type; /* What is the type? */
  gpointer      type_data; /* Extra data needed by the object */
  DobjPoints   *points; /* List of points */
  DobjFunc      drawfunc; /* How do I draw myself */
  DobjFunc      paintfunc; /* Draw me on canvas */
  DobjGenFunc   copyfunc;  /* copy */
  DobjLoadFunc  loadfunc;  /* Load this type of object */
  DobjSaveFunc  savefunc;  /* Save me out */
} Dobject;


static Dobject *obj_creating; /* Object we are creating */
static Dobject *tmp_line; /* Needed when drawing lines */
static Dobject *tmp_bezier; /* Neeed when drawing bezier curves */

typedef struct DAllObjs
{
  struct DAllObjs *next; 
  Dobject         *obj; /* Object on list */
} DAllObjs;
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/* States of the object */
#define GFIG_OK       0x0
#define GFIG_MODIFIED 0x1
#define GFIG_READONLY 0x2

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typedef struct DFigObj
{
  gchar     *name;     /* Trailing name of file  */
  gchar     *filename; /* Filename itself */
  gchar     *draw_name;/* Name of the drawing */
  gfloat     version;     /* Version number of data file */
  GfigOpts   opts;    /* Options enforced when fig saved */
  DAllObjs  *obj_list; /* Objects that make up this list */
  gint       obj_status;    /* See above for possible values */
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  GtkWidget *list_item;
  GtkWidget *label_widget;
  GtkWidget *pixmap_widget;
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} GFigObj;  
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typedef struct BrushDesc
{
  gchar  *bname; /* name of the brush */
  gint32  width;  /* Width of brush */
  gint32  height;  /* Height of brush */
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  guchar *pv_buf; /* Buffer where brush placed */
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  gint16  x_off;
  gint16  y_off;
  gint    bpp; /* Depth - should ALWAYS be the same for all BrushDesc */
} BrushDesc;
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static GFigObj  *current_obj;
static Dobject  *operation_obj;
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static GdkPoint *move_all_pnt; /* Point moving all from */
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static GFigObj  *pic_obj;
static DAllObjs *undo_table[MAX_UNDO];
static gint      need_to_scale;
static gint32    brush_image_ID = -1;

static GtkWidget *undo_widget;
static GtkWidget *gfig_op_menu; /* Popup menu in the list box */
static GtkWidget *delete_frame_to_freeze; /* Top preview frame window */
static GtkWidget *fade_out_hbox;   /* Fade out widget in brush page */
static GtkWidget *pressure_hbox;   /* Pressure widget in brush page */
static GtkWidget *pencil_hbox;     /* Dummy widget in brush page */
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static GtkWidget *pos_label;       /* XY pos marker */
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static GtkWidget *brush_page_widget; /* Widget for the brush part of notebook */
static GtkWidget *select_page_widget; /* Widget for the selection part
				       * of notebook */
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static gint undo_water_mark = -1; /* Last slot filled in -1 = no undo */
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static gint drawing_pic = FALSE;  /* If true drawing to the small preview */
static GtkWidget *status_label_dname;
static GtkWidget *status_label_fname;
static GFigObj   *gfig_obj_for_menu; /* More static data -
				      * need to know which object was selected*/
static GtkWidget *save_menu_item;  
static GtkWidget *save_button;
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/* Don't up just like BIGGG source files? */

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static void       object_start            (GdkPoint *pnt, gint);
static void       object_operation        (GdkPoint *pnt, gint);
static void       object_operation_start  (GdkPoint *pnt, gint shift_down);
static void       object_operation_end    (GdkPoint *pnt, gint);
static void       object_end              (GdkPoint *pnt, gint shift_down);
static void       object_update           (GdkPoint * pnt);
static void       add_to_all_obj          (GFigObj * fobj, Dobject *obj);
static void       d_delete_dobjpoints     (DobjPoints *);
static Dobject  * d_new_line              (gint x, gint y);
static Dobject  * d_new_circle            (gint x, gint y);
static DAllObjs * copy_all_objs           (DAllObjs *objs);
static void       setup_undo              (void);
static void       d_pnt_add_line          (Dobject *obj,
					   gint x, gint y, gint pos);
static GFigObj  * gfig_load               (gchar *filename, gchar *name);
static void       free_all_objs           (DAllObjs * objs);
static void       draw_objects            (DAllObjs *objs, gint show_single);
static Dobject  * d_load_line             (FILE *from);
static Dobject  * d_load_circle           (FILE *from);
static gchar    * get_line                (gchar *buf, gint s,
					   FILE * from, gint init);
static GFigObj  * gfig_new                (void);
static void       clear_undo              (void);
static void       list_button_update      (GFigObj *obj);
static void       prepend_to_all_obj      (GFigObj *fobj, DAllObjs *nobj);
static void       gfig_update_stat_labels (void);
static void       gfig_obj_modified       (GFigObj *obj, gint stat_type);
static void       gfig_op_menu_create     (GtkWidget *window);
static void       gridtype_menu_callback  (GtkWidget *widget, gpointer data);
static void       draw_one_obj            (Dobject * obj);
static void       d_save_poly             (Dobject * obj, FILE *to);
static Dobject  * d_load_poly             (FILE *from);
static void       d_draw_poly             (Dobject *obj);
static void       d_paint_poly            (Dobject *obj);
static Dobject  * d_copy_poly             (Dobject * obj);
static Dobject  * d_new_poly              (gint x, gint y);
static void       d_update_poly           (GdkPoint *pnt);
static void       d_poly_start            (GdkPoint *pnt, gint shift_down);
static void       d_poly_end              (GdkPoint *pnt, gint shift_down);
static void       d_save_star             (Dobject * obj, FILE *to);
static Dobject  * d_load_star             (FILE *from);
static void       d_draw_star             (Dobject *obj);
static void       d_paint_star            (Dobject *obj);
static Dobject  * d_copy_star             (Dobject * obj);
static Dobject  * d_new_star              (gint x, gint y);
static void       d_update_star           (GdkPoint *pnt);
static void       d_star_start            (GdkPoint *pnt, gint shift_down);
static void       d_star_end              (GdkPoint *pnt, gint shift_down);
static Dobject  * d_load_spiral           (FILE *from);
static void       d_draw_spiral           (Dobject *obj);
static void       d_paint_spiral          (Dobject *obj);
static Dobject  * d_copy_spiral           (Dobject * obj);
static Dobject  * d_new_spiral            (gint x, gint y);
static void       d_update_spiral         (GdkPoint *pnt);
static void       d_spiral_start          (GdkPoint *pnt, gint shift_down);
static void       d_spiral_end            (GdkPoint *pnt, gint shift_down);

static Dobject  * d_load_bezier           (FILE *from);
static void       d_draw_bezier           (Dobject *obj);
static void       d_paint_bezier          (Dobject *obj);
static Dobject  * d_copy_bezier           (Dobject * obj);
static Dobject  * d_new_bezier            (gint x, gint y);
static void       d_update_bezier         (GdkPoint *pnt);
static void       d_bezier_start          (GdkPoint *pnt, gint shift_down);
static void       d_bezier_end            (GdkPoint *pnt, gint shift_down);

static void       new_obj_2edit           (GFigObj *obj);
static Dobject  * d_new_ellipse           (gint x, gint y);
static Dobject  * d_load_ellipse          (FILE *from);
static Dobject  * d_new_arc               (gint x, gint y);
static Dobject  * d_load_arc              (FILE *from);
static gint       load_options            (GFigObj *gfig, FILE *fp);
static gint       gfig_obj_counts         (DAllObjs * objs);

static void    gfig_brush_fill_preview_xy (GtkWidget *pw, gint x , gint y);
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/* globals */

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static gint    gfig_run;
static GdkGC  *gfig_gc;
static GdkGC  *grid_hightlight_drawgc;
static gint    grid_gc_type = GTK_STATE_NORMAL;
static guchar *pv_cache = NULL;
static guchar  preview_row[PREVIEW_SIZE*4];
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/* Stuff for the preview bit */
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static gint    sel_x1, sel_y1, sel_x2, sel_y2;
static gint    sel_width, sel_height;
static gint    preview_width, preview_height;
static gint    has_alpha;
static gdouble scale_x_factor, scale_y_factor;
static gdouble org_scale_x_factor, org_scale_y_factor;
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MAIN ()
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static void
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query (void)
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{
  static GParamDef args[] =
  {
    { PARAM_INT32, "run_mode", "Interactive, non-interactive" },
    { PARAM_IMAGE, "image", "Input image (unused)" },
    { PARAM_DRAWABLE, "drawable", "Input drawable" },
    { PARAM_INT32, "dummy", "dummy" } 
  };
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  static gint nargs = sizeof (args) / sizeof (args[0]);
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  gimp_install_procedure ("plug_in_gfig",
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			  "Create Geometrical shapes with the Gimp",
			  "More here later",
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			  "Andy Thomas",
			  "Andy Thomas",
			  "1997",
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			  N_("<Image>/Filters/Render/Gfig..."),
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			  "RGB*, GRAY*",
			  PROC_PLUG_IN,
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			  nargs, 0,
			  args, NULL);
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}

static void
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run (gchar    *name,
     gint      nparams,
     GParam   *param,
     gint     *nreturn_vals,
     GParam  **return_vals)
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{
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  GParam * values = g_new (GParam, 1);
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  GDrawable *drawable;
  GRunModeType run_mode;
  GStatusType status = STATUS_SUCCESS;

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  gint pwidth, pheight;
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  /*kill (getpid (), 19);*/
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  run_mode = param[0].data.d_int32;
  gfig_image = param[1].data.d_image;
  gfig_drawable = param[2].data.d_drawable;

  *nreturn_vals = 1;
  *return_vals = values;

  values[0].type = PARAM_STATUS;
  values[0].data.d_status = status;

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  gfig_select_drawable = drawable =
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    gimp_drawable_get (param[2].data.d_drawable);

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  tile_width  = gimp_tile_width ();
  tile_height = gimp_tile_height ();
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  /* TMP Hack - clear any selections */
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  gfig_clear_selection (gfig_image);
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  gimp_drawable_mask_bounds (drawable->id, &sel_x1, &sel_y1, &sel_x2, &sel_y2);
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  sel_width  = sel_x2 - sel_x1;
  sel_height = sel_y2 - sel_y1;

  /* Calculate preview size */
  
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  if (sel_width > sel_height)
    {
      pwidth  = MIN (sel_width, PREVIEW_SIZE);
      pheight = sel_height * pwidth / sel_width;
    }
  else
    {
      pheight = MIN (sel_height, PREVIEW_SIZE);
      pwidth  = sel_width * pheight / sel_height;
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  }
  
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  preview_width  = MAX (pwidth, 2);  /* Min size is 2 */
  preview_height = MAX (pheight, 2); 
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  org_scale_x_factor = scale_x_factor =
    (gdouble) sel_width / (gdouble) preview_width;
  org_scale_y_factor = scale_y_factor =
    (gdouble) sel_height / (gdouble) preview_height;
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  switch (run_mode)
    {
    case RUN_INTERACTIVE:
      /*gimp_get_data ("plug_in_gfig", &selvals);*/
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      INIT_I18N_UI ();
      if (!gfig_dialog ())
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	{
	  gimp_drawable_detach (drawable);
	  return;
	}
      break;

    case RUN_NONINTERACTIVE:
      status = STATUS_CALLING_ERROR;
      break;

    case RUN_WITH_LAST_VALS:
      /*gimp_get_data ("plug_in_gfig", &selvals);*/
      break;

    default:
      break;
    }

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  if (gimp_drawable_is_rgb (drawable->id) ||
      gimp_drawable_is_gray (drawable->id))
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    {
      /* Set the tile cache size */
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      gimp_tile_cache_ntiles ((drawable->width + gimp_tile_width () - 1) /
			      gimp_tile_width ());
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      do_gfig ();
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      if (run_mode != RUN_NONINTERACTIVE)
	gimp_displays_flush ();

#if 0
      if (run_mode == RUN_INTERACTIVE)
	gimp_set_data ("plug_in_gfig", &selvals, sizeof (SelectItVals));
#endif /* 0 */
    }
  else
    {
      status = STATUS_EXECUTION_ERROR;
    }

  values[0].data.d_status = status;

  gimp_drawable_detach (drawable);
}

static void
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gfig_clear_selection (gint32 image_ID)
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{
  GParam *return_vals;
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  gint nreturn_vals;
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  /* Clear any selection - needed because drawing circles/ellipses 
   * uses the selection method and will confuse the output.
   */
  return_vals = gimp_run_procedure ("gimp_selection_clear",
                                    &nreturn_vals,
                                    PARAM_IMAGE, image_ID,
                                    PARAM_END);
  
  gimp_destroy_params (return_vals, nreturn_vals);
}

/*
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 *  Query gimprc for gfig-path, and parse it.
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 */

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static void
plug_in_parse_gfig_path (void)
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{
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  GList *fail_list = NULL;
  GList *list;
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  gchar *gfig_path;
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  if (gfig_path_list)
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    gimp_path_free (gfig_path_list);
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  gfig_path_list = NULL;
  
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  gfig_path = gimp_gimprc_query ("gfig-path");

  if (!gfig_path)
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    {
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      gchar *gimprc = gimp_personal_rc_file ("gimprc");
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      gchar *path = gimp_strescape
	("${gimp_dir}" G_DIR_SEPARATOR_S "gfig"
	 G_SEARCHPATH_SEPARATOR_S
	 "${gimp_data_dir}" G_DIR_SEPARATOR_S "gfig",
	 NULL);
      g_message (_("No gfig-path in gimprc:\n"
		   "You need to add an entry like\n"
		   "(gfig-path \"%s\")\n"
		   "to your %s file."),
		   path, gimprc);
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      g_free (gimprc);
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      g_free (path);
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      return;
    }
  
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  gfig_path_list = gimp_path_parse (gfig_path, 16, TRUE, &fail_list);
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  g_free (gfig_path);
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  if (fail_list)
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    {
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      GString *err =
	g_string_new (_("gfig-path misconfigured - "
			"the following directories were not found"));
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      for (list = fail_list; list; list = g_list_next (list))
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	{
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	  g_string_append_c (err, '\n');
	  g_string_append (err, (gchar *) list->data);
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	}

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      g_message (err->str);
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      g_string_free (err, TRUE);
      gimp_path_free (fail_list);
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    }
}


/*
  Translate SPACE to "\\040", etc.
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  Taken from gflare plugin
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 */
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static void
gfig_name_encode (gchar *dest,
		  gchar *src)
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{
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  gint cnt = MAX_LOAD_LINE - 1;
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  while (*src && cnt--)
    {
      if (iscntrl (*src) || isspace (*src) || *src == '\\')
	{
	  sprintf (dest, "\\%03o", *src++);
	  dest += 4;
	}
      else
	*dest++ = *src++;
    }
  *dest = '\0';
}

/*
  Translate "\\040" to SPACE, etc.
 */
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static void
gfig_name_decode (gchar *dest,
		  gchar *src)
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{
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  gint cnt = MAX_LOAD_LINE - 1;
  gint tmp;
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  while (*src && cnt--)
    {
      if (*src == '\\' && *(src+1) && *(src+2) && *(src+3))
	{
	  sscanf (src+1, "%3o", &tmp);
	  *dest++ = tmp;
	  src += 4;
	}
      else
	*dest++ = *src++;
    }
  *dest = '\0';
}


/*
 * Load all gfig, which are founded in gfig-path-list, into gfig_list.
 * gfig-path-list must be initialized first. (plug_in_parse_gfig_path ())
 * based on code from Gflare.
 */

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static gint
gfig_list_pos (GFigObj *gfig)
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{
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  GFigObj *g;
  gint n;
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  GList *tmp;

  n = 0;
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  for (tmp = gfig_list; tmp; tmp = g_list_next (tmp)) 
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    {
      g = tmp->data;
      
      if (strcmp (gfig->draw_name, g->draw_name) <= 0)
	break;
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      n++;
    }

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  return n;
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}

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static gint
gfig_list_insert (GFigObj *gfig)
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{
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  gint n;
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  /*
   *	Insert gfigs in alphabetical order
   */

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  n = gfig_list_pos (gfig);
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  gfig_list = g_list_insert (gfig_list, gfig, n);

#ifdef DEBUG
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  printf ("gfig_list_insert %s => %d\n", gfig->draw_name, n);
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#endif /* DEBUG */

  return n;
}

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static void
gfig_free (GFigObj *gfig)
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{
  g_assert (gfig != NULL);

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  if (gfig->obj_list)
    free_all_objs (gfig->obj_list);

  g_free (gfig->name);
  g_free (gfig->filename);
  g_free (gfig->draw_name);

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  g_free (gfig);
}

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static void
gfig_free_everything (GFigObj *gfig)
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{
  g_assert (gfig != NULL);

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  if (gfig->filename)
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    {
#ifdef DEBUG
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      printf ("Removing filename '%s'\n", gfig->filename);
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#endif /* DEBUG */
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      remove (gfig->filename);
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    }
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  gfig_free (gfig);
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}

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static void
gfig_list_free_all (void)
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{
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  GList   *list;
  GFigObj *gfig;
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  for (list = gfig_list; list; list = g_list_next (list))
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    {
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      gfig = (GFigObj *) list->data;
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      gfig_free (gfig);
    }

  g_list_free (gfig_list);
  gfig_list = NULL;
}


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static void
gfig_list_load_all (GList *plist)
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{
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  GFigObj *gfig;
  GList   *list;
  gchar	  *path;
  gchar	  *filename;
  DIR	  *dir;
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  struct dirent *dir_ent;
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  struct stat    filestat;
  gint err;
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  /*  Make sure to clear any existing gfigs  */
  current_obj = pic_obj = NULL;
  gfig_list_free_all ();

  list = plist;
  while (list)
    {
      path = list->data;
      list = list->next;

      /* Open directory */
      dir = opendir (path);

      if (!dir)
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	g_warning ("Error reading GFig directory \"%s\"", path);
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      else
	{
	  while ((dir_ent = readdir (dir)))
	    {
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	      filename = g_malloc (strlen (path) + strlen (dir_ent->d_name) + 1);
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	      sprintf (filename, "%s%s", path, dir_ent->d_name);

	      /* Check the file and see that it is not a sub-directory */
	      err = stat (filename, &filestat);

	      if (!err && S_ISREG (filestat.st_mode))
		{
		  gfig = gfig_load (filename, dir_ent->d_name);
		  
		  if (gfig)
		    {
		      /* Read only ?*/
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		      if (access (filename, W_OK))
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			gfig->obj_status |= GFIG_READONLY;

		      gfig_list_insert (gfig);
		    }
		}

	      g_free (filename);
	    } /* while */
	  closedir (dir);
	} /* else */
    }

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  if (!gfig_list)
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    {
      /* lets have at least one! */
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      gfig = gfig_new ();
      gfig->draw_name = g_strdup (_("First Gfig"));
      gfig_list_insert (gfig);
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    }
  pic_obj = current_obj = gfig_list->data;  /* set to first entry */

}

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static GFigObj *
gfig_new (void)
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{
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  GFigObj * new;

  new = g_new0 (GFigObj, 1);
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  return new;
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}

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static void
gfig_load_objs (GFigObj *gfig,
		gint     load_count,
		FILE    *fp)
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{
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  Dobject *obj;
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  gchar load_buf[MAX_LOAD_LINE];

  /* Loading object */
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  /*kill (getpid (), 19);*/
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  /* Read first line */
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  while (load_count-- > 0)
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    {
      obj = NULL;
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      get_line (load_buf, MAX_LOAD_LINE, fp, 0);

      if (!strcmp (load_buf, "<LINE>"))
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	{
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	  obj = d_load_line (fp);
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	}
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      else if (!strcmp (load_buf, "<CIRCLE>"))
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	{
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	  obj = d_load_circle (fp);
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	}
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      else if (!strcmp (load_buf, "<ELLIPSE>"))
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	{
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	  obj = d_load_ellipse (fp);
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	}
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      else if (!strcmp (load_buf, "<POLY>"))
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	{
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	  obj = d_load_poly (fp);
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	}
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      else if (!strcmp (load_buf, "<STAR>"))
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	{
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	  obj = d_load_star (fp);
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	}
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      else if (!strcmp (load_buf, "<SPIRAL>"))