sp-polyline.cpp

#define __SP_POLYLINE_C__

/*
 * SVG <polyline> implementation
 *
 * Authors:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 1999-2002 Lauris Kaplinski
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#include "config.h"

#include "attributes.h"
#include "sp-polyline.h"
#include "display/curve.h"
#include <glibmm/i18n.h>
#include "xml/repr.h"

static void sp_polyline_class_init (SPPolyLineClass *klass);
static void sp_polyline_init (SPPolyLine *polyline);

static void sp_polyline_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
static void sp_polyline_set (SPObject *object, unsigned int key, const gchar *value);
static Inkscape::XML::Node *sp_polyline_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);

static gchar * sp_polyline_description (SPItem * item);

static SPShapeClass *parent_class;

GType
sp_polyline_get_type (void)
{
      static GType polyline_type = 0;

      if (!polyline_type) {
            GTypeInfo polyline_info = {
                  sizeof (SPPolyLineClass),
                  NULL, /* base_init */
                  NULL, /* base_finalize */
                  (GClassInitFunc) sp_polyline_class_init,
                  NULL, /* klass_finalize */
                  NULL, /* klass_data */
                  sizeof (SPPolyLine),
                  16,   /* n_preallocs */
                  (GInstanceInitFunc) sp_polyline_init,
                  NULL, /* value_table */
            };
            polyline_type = g_type_register_static (SP_TYPE_SHAPE, "SPPolyLine", &polyline_info, (GTypeFlags)0);
      }
      return polyline_type;
}

static void
sp_polyline_class_init (SPPolyLineClass *klass)
{
      GObjectClass * gobject_class;
      SPObjectClass * sp_object_class;
      SPItemClass * item_class;

      gobject_class = (GObjectClass *) klass;
      sp_object_class = (SPObjectClass *) klass;
      item_class = (SPItemClass *) klass;

      parent_class = (SPShapeClass *)g_type_class_ref (SP_TYPE_SHAPE);

      sp_object_class->build = sp_polyline_build;
      sp_object_class->set = sp_polyline_set;
      sp_object_class->write = sp_polyline_write;

      item_class->description = sp_polyline_description;
}

static void
sp_polyline_init (SPPolyLine * polyline)
{
      /* Nothing here */
}

static void
sp_polyline_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr)
{

      if (((SPObjectClass *) parent_class)->build)
            ((SPObjectClass *) parent_class)->build (object, document, repr);

      sp_object_read_attr (object, "points");
}

static void
sp_polyline_set (SPObject *object, unsigned int key, const gchar *value)
{
      SPPolyLine *polyline;

      polyline = SP_POLYLINE (object);

      switch (key) {
      case SP_ATTR_POINTS: {
            SPCurve * curve;
            const gchar * cptr;
            char * eptr;
            gboolean hascpt;

            if (!value) break;
            curve = sp_curve_new ();
            hascpt = FALSE;

            cptr = value;
            eptr = NULL;

            while (TRUE) {
                  gdouble x, y;

                  while (*cptr != '\0' && (*cptr == ',' || *cptr == '\x20' || *cptr == '\x9' || *cptr == '\xD' || *cptr == '\xA')) {
                        cptr++;
                  }
                  if (!*cptr) break;

                  x = g_ascii_strtod (cptr, &eptr);
                  if (eptr == cptr) break;
                  cptr = eptr;

                  while (*cptr != '\0' && (*cptr == ',' || *cptr == '\x20' || *cptr == '\x9' || *cptr == '\xD' || *cptr == '\xA')) {
                        cptr++;
                  }
                  if (!*cptr) break;

                  y = g_ascii_strtod (cptr, &eptr);
                  if (eptr == cptr) break;
                  cptr = eptr;
                  if (hascpt) {
                        sp_curve_lineto (curve, x, y);
                  } else {
                        sp_curve_moveto (curve, x, y);
                        hascpt = TRUE;
                  }
            }
            
            sp_shape_set_curve (SP_SHAPE (polyline), curve, TRUE);
            sp_curve_unref (curve);
            break;
      }
      default:
            if (((SPObjectClass *) parent_class)->set)
                  ((SPObjectClass *) parent_class)->set (object, key, value);
            break;
      }
}

static Inkscape::XML::Node *
sp_polyline_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
{
      SPPolyLine *polyline;

      polyline = SP_POLYLINE (object);

      if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
            repr = sp_repr_new ("svg:polyline");
      }

      if (repr != SP_OBJECT_REPR (object)) {
            repr->mergeFrom(SP_OBJECT_REPR (object), "id");
      }

      if (((SPObjectClass *) (parent_class))->write)
            ((SPObjectClass *) (parent_class))->write (object, repr, flags);

      return repr;
}

static gchar *
sp_polyline_description(SPItem *item)
{
      return g_strdup(_("<b>Polyline</b>"));
}