#define __SP_POLYGON_C__

#include "config.h"

#include "attributes.h"

#include "sp-polygon.h"

#include "display/curve.h"

#include <glibmm/i18n.h>

#include <2geom/pathvector.h>

#include <2geom/bezier-curve.h>

#include <2geom/hvlinesegment.h>

#include "helper/geom-curves.h"

#include "svg/stringstream.h"

#include "xml/repr.h"

#include "document.h"

static void sp_polygon_class_init(SPPolygonClass *pc);

static void sp_polygon_init(SPPolygon *polygon);

static void sp_polygon_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);

static Inkscape::XML::Node *sp_polygon_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);

static gchar *sp_polygon_description(SPItem *item);

static SPShapeClass *parent_class;

GType sp_polygon_get_type(void)

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPPolygonClass),

0, // base_init

0, // base_finalize

(GClassInitFunc)sp_polygon_class_init,

0, // class_finalize

0, // class_data

sizeof(SPPolygon),

0, // n_preallocs

(GInstanceInitFunc)sp_polygon_init,

0 // value_table

};

type = g_type_register_static(SP_TYPE_SHAPE, "SPPolygon", &info, static_cast<GTypeFlags>(0));

}

return type;

}

static void sp_polygon_class_init(SPPolygonClass *pc)

{

SPObjectClass *sp_object_class = (SPObjectClass *) pc;

SPItemClass *item_class = (SPItemClass *) pc;

parent_class = (SPShapeClass *) g_type_class_ref(SP_TYPE_SHAPE);

sp_object_class->build = sp_polygon_build;

sp_object_class->write = sp_polygon_write;

sp_object_class->set = sp_polygon_set;

item_class->description = sp_polygon_description;

}

static void sp_polygon_init(SPPolygon */*polygon*/)

{

/* Nothing here */

}

static void sp_polygon_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 gchar *sp_svg_write_polygon(Geom::PathVector const & pathv)

{

Inkscape::SVGOStringStream os;

for (Geom::PathVector::const_iterator pit = pathv.begin(); pit != pathv.end(); ++pit) {

for (Geom::Path::const_iterator cit = pit->begin(); cit != pit->end_default(); ++cit) {

if ( is_straight_curve(*cit) )

{

os << cit->finalPoint()[0] << "," << cit->finalPoint()[1] << " ";

} else {

g_error("sp_svg_write_polygon: polygon path contains non-straight line segments");

}

}

}

return g_strdup(os.str().c_str());

}

static Inkscape::XML::Node *sp_polygon_write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)

{

SPShape *shape = SP_SHAPE(object);

// Tolerable workaround: we need to update the object's curve before we set points=

// because it's out of sync when e.g. some extension attrs of the polygon or star are changed in XML editor

sp_shape_set_shape(shape);

if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {

repr = xml_doc->createElement("svg:polygon");

}

/* We can safely write points here, because all subclasses require it too (Lauris) */

gchar *str = sp_svg_write_polygon(shape->curve->get_pathvector());

repr->setAttribute("points", str);

g_free(str);

if (((SPObjectClass *) (parent_class))->write) {

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

}

return repr;

}

static gboolean polygon_get_value(gchar const **p, gdouble *v)

{

while (**p != '\0' && (**p == ',' || **p == '\x20' || **p == '\x9' || **p == '\xD' || **p == '\xA')) {

(*p)++;

}

if (*p == '\0') {

return false;

}

gchar *e = NULL;

*v = g_ascii_strtod(*p, &e);

if (e == *p) {

return false;

}

*p = e;

return true;

}

void sp_polygon_set(SPObject *object, unsigned int key, const gchar *value)

{

SPPolygon *polygon = SP_POLYGON(object);

switch (key) {

case SP_ATTR_POINTS: {

if (!value) {

/* fixme: The points attribute is required. We should handle its absence as per

break;

}

SPCurve *curve = new SPCurve();

gboolean hascpt = FALSE;

gchar const *cptr = value;

bool has_error = false;

while (TRUE) {

gdouble x;

if (!polygon_get_value(&cptr, &x)) {

break;

}

gdouble y;

if (!polygon_get_value(&cptr, &y)) {

/* fixme: It is an error for an odd number of points to be specified. We

has_error = true;

break;

}

if (hascpt) {

curve->lineto(x, y);

} else {

curve->moveto(x, y);

hascpt = TRUE;

}

}

if (has_error || *cptr != '\0') {

/* TODO: Flag the document as in error, as per

} else if (hascpt) {

/* We might have done a moveto but no lineto. I'm not sure how we're supposed to represent

curve->closepath();

}

sp_shape_set_curve(SP_SHAPE(polygon), curve, TRUE);

curve->unref();

break;

}

default:

if (((SPObjectClass *) parent_class)->set) {

((SPObjectClass *) parent_class)->set(object, key, value);

}

break;

}

}

static gchar *sp_polygon_description(SPItem */*item*/)

{

return g_strdup(_("<b>Polygon</b>"));

}