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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 <stdio.h>
#include <stdlib.h>
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#include <errno.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 __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED

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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
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#endif

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

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#include "gfig-stock.h"

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

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#define PREVIEW_SIZE     400
#define SCALE_WIDTH      120
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#define MIN_GRID         10
#define MAX_GRID         50
#define MAX_UNDO         10
#define MIN_UNDO         1
#define MAX_LOAD_LINE    256
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#define SMALL_PREVIEW_SZ 48
#define BRUSH_PREVIEW_SZ 32
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#define GFIG_HEADER      "GFIG Version 0.1\n"
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#define PREVIEW_MASK  (GDK_EXPOSURE_MASK       | \
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		       GDK_POINTER_MOTION_MASK | \
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                       GDK_BUTTON_PRESS_MASK   | \
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		       GDK_BUTTON_RELEASE_MASK | \
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		       GDK_BUTTON_MOTION_MASK  | \
		       GDK_KEY_PRESS_MASK      | \
		       GDK_KEY_RELEASE_MASK)
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static GimpDrawable *gfig_select_drawable;
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static GtkWidget    *gfig_preview;
static GtkWidget    *pic_preview;
static GtkWidget    *gfig_gtk_list;
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);
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static void      run    (gchar       *name,
			 gint         nparams,
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			 GimpParam   *param,
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			 gint        *nreturn_vals,
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			 GimpParam  **return_vals);
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static gint      gfig_dialog               (void);
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);
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static gboolean  pic_preview_expose        (GtkWidget *widget,
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					    GdkEvent  *event);
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static void      gfig_preview_realize      (GtkWidget *widget);
static gboolean  gfig_preview_expose       (GtkWidget *widget,
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					    GdkEvent  *event);
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static gboolean  gfig_preview_events       (GtkWidget *widget,
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					    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);

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

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

static gint      calculate_point_to_line_distance (GdkPoint *p,
						   GdkPoint *A,
						   GdkPoint *B,
						   GdkPoint *I);
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GimpPlugInInfo PLUG_IN_INFO =
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{
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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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  ORIGINAL_LAYER = 0,
  SINGLE_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,
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  LAYER_FG_BG,
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  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
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#define GRID_RENDER_MENU 2
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#define GRID_IGNORE      0 
#define GRID_HIGHTLIGHT  1
#define GRID_RESTORE     2
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#define GFIG_BLACK_GC -2
#define GFIG_WHITE_GC -3
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#define GFIG_GREY_GC  -4
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#define PAINT_LAYERS_MENU 1
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#define PAINT_BGS_MENU    2
#define PAINT_TYPE_MENU   3
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#define SELECT_TYPE_MENU      1
#define SELECT_ARCTYPE_MENU   2
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#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;
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  gboolean drawgrid;
  gboolean snap2grid;
  gboolean lockongrid;
  gboolean showcontrol;
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} 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;
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  gboolean      showimage;
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  gint          maxundo;
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  gboolean      showpos;
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  gdouble       brushfade;
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  gdouble       brushgradient;
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  gdouble       airbrushpressure;
  DrawonLayers  onlayers;
  LayersBGType  onlayerbg;
  PaintType     painttype;
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  gboolean      reverselines;
  gboolean      scaletoimage;
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  gdouble       scaletoimagefp;
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  gboolean      approxcircles;
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  BrushType     brshtype;
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  DobjType      otype;
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} SelectItVals;

/* Values when first invoked */
static SelectItVals selvals =
{
  {
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    MIN_GRID + (MAX_GRID - MIN_GRID)/2, /* Gridspacing     */
    RECT_GRID,            /* Default to rectangle type     */
    FALSE,                /* drawgrid                      */
    FALSE,                /* snap2grid                     */
    FALSE,                /* lockongrid                    */
    TRUE                  /* show control points           */
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  },
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  FALSE,                  /* show image                    */
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  MIN_UNDO + (MAX_UNDO - MIN_UNDO)/2,  /* Max level of undos */
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  TRUE,                   /* Show pos updates              */
  0.0,                    /* Brush fade                    */
  0.0,                    /* Brush gradient                */
  20.0,                   /* Air bursh pressure            */
  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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};

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typedef enum
{
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  ADD = 0,
  SUBTRACT,
  REPLACE,
  INTERSECT
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} SelectionType;
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typedef enum
{
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  ARC_SEGMENT = 0,
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  ARC_SECTOR
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} ArcType;
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typedef enum
{
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  FILL_FOREGROUND = 0,
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  FILL_BACKGROUND,
  FILL_PATTERN
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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
{
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  SelectionType type;           /* ADD etc .. */
  gint          antia;          /* Boolean for Antia */
  gint          feather;        /* Feather it ? */
  gdouble       feather_radius; /* Radius to feather */
  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? */
  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 */
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  ARC_SEGMENT,  /* Arc as a segment */
  FILL_PATTERN, /* Fill as pattern */
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  FILL_EACH,    /* Fill after each selection */
  100.0,        /* Max opacity */
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};


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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 */

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static gint obj_show_single   = -1; /* -1 all >= 0 object number */
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/* 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 *);
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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
{
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  DobjType      type;      /* What is the type? */
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  gint          type_data; /* Extra data needed by the object */
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  DobjPoints   *points;    /* List of points */
  DobjFunc      drawfunc;  /* How do I draw myself */
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  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 */
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static Dobject *tmp_line;     /* Needed when drawing lines */
static Dobject *tmp_bezier;   /* Neeed when drawing bezier curves */
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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
{
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  gchar     *name;        /* Trailing name of file  */
  gchar     *filename;    /* Filename itself */
  gchar     *draw_name;   /* Name of the drawing */
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  gfloat     version;     /* Version number of data file */
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  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
{
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  gchar                *name;
  gdouble               opacity;
  gint                  spacing;
  GimpLayerModeEffects  paint_mode;
  gint                  width;
  gint                  height;
  guchar               *pv_buf;  /* Buffer where brush placed */
  gint16                x_off;
  gint16                y_off;
  gchar                *popup;
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} 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;
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static GtkWidget *gfig_op_menu;    /* Popup menu in the list box */
static GtkWidget *object_list;     /* Top preview frame window */
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static GtkWidget *fade_out_hbox;   /* Fade out widget in brush page */
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static GtkWidget *gradient_hbox;   /* Gradient widget in brush page */
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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 */
static gint       drawing_pic = FALSE;  /* If true drawing to the small preview */
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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);
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static GFigObj  * gfig_load               (const gchar *filename,
                                           const gchar *name);
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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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static void      brush_list_button_callback (BrushDesc *bdesc);

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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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{
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  static GimpParamDef args[] =
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  {
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    { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
    { GIMP_PDB_IMAGE, "image", "Input image (unused)" },
    { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
    { GIMP_PDB_INT32, "dummy", "dummy" } 
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  };
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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*",
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			  GIMP_PLUGIN,
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			  G_N_ELEMENTS (args), 0,
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			  args, NULL);
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}

static void
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run (gchar       *name,
     gint         nparams,
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     GimpParam   *param,
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     gint        *nreturn_vals,
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     GimpParam  **return_vals)
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{
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  GimpParam         *values = g_new (GimpParam, 1);
  GimpDrawable      *drawable;
  GimpRunMode        run_mode;
  GimpPDBStatusType  status = GIMP_PDB_SUCCESS;
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  gint pwidth, pheight;
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  /*kill (getpid (), 19);*/
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  INIT_I18N ();

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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;

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

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  gfig_select_drawable = drawable = 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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  if (! gimp_selection_is_empty (gfig_image))
    gimp_selection_clear (gfig_image);
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  gimp_drawable_mask_bounds (drawable->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)
    {
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    case GIMP_RUN_INTERACTIVE:
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      /*gimp_get_data ("plug_in_gfig", &selvals);*/
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      if (! gfig_dialog ())
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	{
	  gimp_drawable_detach (drawable);
	  return;
	}
      break;

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    case GIMP_RUN_NONINTERACTIVE:
      status = GIMP_PDB_CALLING_ERROR;
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      break;

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

    default:
      break;
    }

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  if (gimp_drawable_is_rgb (drawable->drawable_id) ||
      gimp_drawable_is_gray (drawable->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 != GIMP_RUN_NONINTERACTIVE)
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	gimp_displays_flush ();

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

  values[0].data.d_status = status;

  gimp_drawable_detach (drawable);
}

/*
  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--)
    {
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      if (g_ascii_iscntrl (*src) || g_ascii_isspace (*src) || *src == '\\')
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	{
	  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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/*
 *	Insert gfigs in alphabetical order
 */

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

  return n;
}

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

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  free_all_objs (gfig->obj_list);
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  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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    {
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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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  g_list_foreach (gfig_list, (GFunc) gfig_free, NULL);
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  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;
  GDir	      *dir;
  const gchar *dir_ent;
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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 */
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      dir = g_dir_open (path, 0, NULL);
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      if (!dir)
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	g_warning ("Error reading Gfig folder \"%s\"", path);
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      else
	{
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	  while ((dir_ent = g_dir_read_name (dir)))
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	    {
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	      filename = g_build_filename (path, dir_ent, NULL);
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	      /* Check the file and see that it is not a sub-directory */
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              if (g_file_test (filename, G_FILE_TEST_IS_REGULAR))
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		{
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		  gfig = gfig_load (filename, dir_ent);
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		  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);
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	    }
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	  g_dir_close (dir);
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	}
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    }

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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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    }

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  pic_obj = current_obj = gfig_list->data;  /* set to first entry */
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}

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static GFigObj *
gfig_new (void)
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{
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  return g_new0 (GFigObj, 1);
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}