#define __SP_FLOWREGION_C__

/*
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <glibmm/i18n.h>

#include <xml/repr.h>
#include "display/curve.h"
#include "sp-shape.h"
#include "sp-text.h"
#include "sp-use.h"
#include "style.h"
#include "document.h"

#include "sp-flowregion.h"

#include "display/canvas-bpath.h"


#include "livarot/Path.h"
#include "livarot/Shape.h"

static void sp_flowregion_class_init (SPFlowregionClass *klass);
static void sp_flowregion_init (SPFlowregion *group);
static void sp_flowregion_dispose (GObject *object);

static void sp_flowregion_child_added (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * ref);
static void sp_flowregion_remove_child (SPObject * object, Inkscape::XML::Node * child);
static void sp_flowregion_update (SPObject *object, SPCtx *ctx, guint flags);
static void sp_flowregion_modified (SPObject *object, guint flags);
static Inkscape::XML::Node *sp_flowregion_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);

static gchar * sp_flowregion_description (SPItem * item);

static SPItemClass * flowregion_parent_class;

static void sp_flowregionexclude_class_init (SPFlowregionExcludeClass *klass);
static void sp_flowregionexclude_init (SPFlowregionExclude *group);
static void sp_flowregionexclude_dispose (GObject *object);

static void sp_flowregionexclude_child_added (SPObject * object, Inkscape::XML::Node * child, Inkscape::XML::Node * ref);
static void sp_flowregionexclude_remove_child (SPObject * object, Inkscape::XML::Node * child);
static void sp_flowregionexclude_update (SPObject *object, SPCtx *ctx, guint flags);
static void sp_flowregionexclude_modified (SPObject *object, guint flags);
static Inkscape::XML::Node *sp_flowregionexclude_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);

static gchar * sp_flowregionexclude_description (SPItem * item);

static SPItemClass * flowregionexclude_parent_class;


static void         GetDest(SPObject* child,Shape **computed,NR::Matrix itr_mat);

GType
sp_flowregion_get_type (void)
{
	static GType group_type = 0;
	if (!group_type) {
		GTypeInfo group_info = {
			sizeof (SPFlowregionClass),
			NULL,	/* base_init */
			NULL,	/* base_finalize */
			(GClassInitFunc) sp_flowregion_class_init,
			NULL,	/* class_finalize */
			NULL,	/* class_data */
			sizeof (SPFlowregion),
			16,	/* n_preallocs */
			(GInstanceInitFunc) sp_flowregion_init,
			NULL,	/* value_table */
		};
		group_type = g_type_register_static (SP_TYPE_ITEM, "SPFlowregion", &group_info, (GTypeFlags)0);
	}
	return group_type;
}

static void
sp_flowregion_class_init (SPFlowregionClass *klass)
{
	GObjectClass * object_class;
	SPObjectClass * sp_object_class;
	SPItemClass * item_class;

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

	flowregion_parent_class = (SPItemClass *)g_type_class_ref (SP_TYPE_ITEM);

	object_class->dispose = sp_flowregion_dispose;

	sp_object_class->child_added = sp_flowregion_child_added;
	sp_object_class->remove_child = sp_flowregion_remove_child;
	sp_object_class->update = sp_flowregion_update;
	sp_object_class->modified = sp_flowregion_modified;
	sp_object_class->write = sp_flowregion_write;

	item_class->description = sp_flowregion_description;
}

static void
sp_flowregion_init (SPFlowregion *group)
{
	new (&group->computed) std::vector<Shape*>;
}

static void
sp_flowregion_dispose(GObject *object)
{
	SPFlowregion *group=(SPFlowregion *)object;
    for (std::vector<Shape*>::iterator it = group->computed.begin() ; it != group->computed.end() ; it++)
        delete *it;
    group->computed.~vector<Shape*>();
}

static void
sp_flowregion_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
	SPItem *item;

	item = SP_ITEM (object);

	if (((SPObjectClass *) (flowregion_parent_class))->child_added)
		(* ((SPObjectClass *) (flowregion_parent_class))->child_added) (object, child, ref);

	object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}

/* fixme: hide (Lauris) */

static void
sp_flowregion_remove_child (SPObject * object, Inkscape::XML::Node * child)
{
	if (((SPObjectClass *) (flowregion_parent_class))->remove_child)
		(* ((SPObjectClass *) (flowregion_parent_class))->remove_child) (object, child);

	object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}


static void
sp_flowregion_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
	SPFlowregion *group;
	SPObject *child;
	SPItemCtx *ictx, cctx;
	GSList *l;

	group = SP_FLOWREGION (object);
	ictx = (SPItemCtx *) ctx;
	cctx = *ictx;

	if (((SPObjectClass *) (flowregion_parent_class))->update)
		((SPObjectClass *) (flowregion_parent_class))->update (object, ctx, flags);

	if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
	flags &= SP_OBJECT_MODIFIED_CASCADE;

	l = NULL;
	for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
		g_object_ref (G_OBJECT (child));
		l = g_slist_prepend (l, child);
	}
	l = g_slist_reverse (l);
	while (l) {
		child = SP_OBJECT (l->data);
		l = g_slist_remove (l, child);
		if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
			if (SP_IS_ITEM (child)) {
				SPItem const &chi = *SP_ITEM(child);
				cctx.i2doc = chi.transform * ictx->i2doc;
				cctx.i2vp = chi.transform * ictx->i2vp;
				child->updateDisplay((SPCtx *)&cctx, flags);
			} else {
				child->updateDisplay(ctx, flags);
			}
		}
		g_object_unref (G_OBJECT (child));
	}

	group->UpdateComputed();
}

void             SPFlowregion::UpdateComputed(void)
{
	SPObject* object=SP_OBJECT(this);

	NR::Matrix itr_mat=sp_item_i2root_affine (SP_ITEM(object));
	itr_mat=itr_mat.inverse();

    for (std::vector<Shape*>::iterator it = computed.begin() ; it != computed.end() ; it++)
        delete *it;
    computed.clear();

	for (SPObject* child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
        Shape *shape = NULL;
		GetDest(child,&shape,itr_mat);
        computed.push_back(shape);
	}
}

static void
sp_flowregion_modified (SPObject *object, guint flags)
{
	SPFlowregion *group;
	SPObject *child;
	GSList *l;

	group = SP_FLOWREGION (object);

	if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
	flags &= SP_OBJECT_MODIFIED_CASCADE;

	l = NULL;
	for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
		g_object_ref (G_OBJECT (child));
		l = g_slist_prepend (l, child);
	}
	l = g_slist_reverse (l);
	while (l) {
		child = SP_OBJECT (l->data);
		l = g_slist_remove (l, child);
		if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
			child->emitModified(flags);
		}
		g_object_unref (G_OBJECT (child));
	}
}

static Inkscape::XML::Node *
sp_flowregion_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
	if ( repr == NULL ) {
            Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
            repr = xml_doc->createElement("svg:flowRegion");
	}

        GSList *l = NULL;
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            Inkscape::XML::Node *crepr = child->updateRepr(NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }

        while (l) {
            repr->addChild((Inkscape::XML::Node *) l->data, NULL);
            Inkscape::GC::release((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }

    } else {
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            child->updateRepr(flags);
        }
    }

	if (((SPObjectClass *) (flowregion_parent_class))->write)
		((SPObjectClass *) (flowregion_parent_class))->write (object, repr, flags);
	
	return repr;
}


static gchar *sp_flowregion_description(SPItem *item)
{
	// TRANSLATORS: "Flow region" is an area where text is allowed to flow
	return g_strdup_printf(_("Flow region"));
}

/*
 *
 */

GType
sp_flowregionexclude_get_type (void)
{
	static GType group_type = 0;
	if (!group_type) {
		GTypeInfo group_info = {
			sizeof (SPFlowregionExcludeClass),
			NULL,	/* base_init */
			NULL,	/* base_finalize */
			(GClassInitFunc) sp_flowregionexclude_class_init,
			NULL,	/* class_finalize */
			NULL,	/* class_data */
			sizeof (SPFlowregionExclude),
			16,	/* n_preallocs */
			(GInstanceInitFunc) sp_flowregionexclude_init,
			NULL,	/* value_table */
		};
		group_type = g_type_register_static (SP_TYPE_ITEM, "SPFlowregionExclude", &group_info, (GTypeFlags)0);
	}
	return group_type;
}

static void
sp_flowregionexclude_class_init (SPFlowregionExcludeClass *klass)
{
	GObjectClass * object_class;
	SPObjectClass * sp_object_class;
	SPItemClass * item_class;

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

	flowregionexclude_parent_class = (SPItemClass *)g_type_class_ref (SP_TYPE_ITEM);

	object_class->dispose = sp_flowregionexclude_dispose;

	sp_object_class->child_added = sp_flowregionexclude_child_added;
	sp_object_class->remove_child = sp_flowregionexclude_remove_child;
	sp_object_class->update = sp_flowregionexclude_update;
	sp_object_class->modified = sp_flowregionexclude_modified;
	sp_object_class->write = sp_flowregionexclude_write;

	item_class->description = sp_flowregionexclude_description;
}

static void
sp_flowregionexclude_init (SPFlowregionExclude *group)
{
	group->computed = NULL;
}

static void
sp_flowregionexclude_dispose(GObject *object)
{
	SPFlowregionExclude *group=(SPFlowregionExclude *)object;
    if (group->computed) {
        delete group->computed;
        group->computed = NULL;
    }
}

static void
sp_flowregionexclude_child_added (SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
{
	SPItem *item;

	item = SP_ITEM (object);

	if (((SPObjectClass *) (flowregionexclude_parent_class))->child_added)
		(* ((SPObjectClass *) (flowregionexclude_parent_class))->child_added) (object, child, ref);

	object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}

/* fixme: hide (Lauris) */

static void
sp_flowregionexclude_remove_child (SPObject * object, Inkscape::XML::Node * child)
{
	if (((SPObjectClass *) (flowregionexclude_parent_class))->remove_child)
		(* ((SPObjectClass *) (flowregionexclude_parent_class))->remove_child) (object, child);

	object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}


static void
sp_flowregionexclude_update (SPObject *object, SPCtx *ctx, unsigned int flags)
{
	SPFlowregionExclude *group;
	SPObject *child;
	SPItemCtx *ictx, cctx;
	GSList *l;

	group = SP_FLOWREGIONEXCLUDE (object);
	ictx = (SPItemCtx *) ctx;
	cctx = *ictx;

	if (((SPObjectClass *) (flowregionexclude_parent_class))->update)
		((SPObjectClass *) (flowregionexclude_parent_class))->update (object, ctx, flags);

	if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
	flags &= SP_OBJECT_MODIFIED_CASCADE;

	l = NULL;
	for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
		g_object_ref (G_OBJECT (child));
		l = g_slist_prepend (l, child);
	}
	l = g_slist_reverse (l);
	while (l) {
		child = SP_OBJECT (l->data);
		l = g_slist_remove (l, child);
		if (flags || (child->uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
			if (SP_IS_ITEM (child)) {
				SPItem const &chi = *SP_ITEM(child);
				cctx.i2doc = chi.transform * ictx->i2doc;
				cctx.i2vp = chi.transform * ictx->i2vp;
				child->updateDisplay((SPCtx *)&cctx, flags);
			} else {
				child->updateDisplay(ctx, flags);
			}
		}
		g_object_unref (G_OBJECT (child));
	}

	group->UpdateComputed();
}
void             SPFlowregionExclude::UpdateComputed(void)
{
	SPObject* object=SP_OBJECT(this);

	if (computed) {
        delete computed;
        computed = NULL;
    }
	NR::Matrix itr_mat=sp_item_i2root_affine (SP_ITEM(object));
	itr_mat=itr_mat.inverse();

	for (SPObject* child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
		GetDest(child,&computed,itr_mat);
	}
}

static void
sp_flowregionexclude_modified (SPObject *object, guint flags)
{
	SPFlowregionExclude *group;
	SPObject *child;
	GSList *l;

	group = SP_FLOWREGIONEXCLUDE (object);

	if (flags & SP_OBJECT_MODIFIED_FLAG) flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
	flags &= SP_OBJECT_MODIFIED_CASCADE;

	l = NULL;
	for (child = sp_object_first_child(object) ; child != NULL ; child = SP_OBJECT_NEXT(child) ) {
		g_object_ref (G_OBJECT (child));
		l = g_slist_prepend (l, child);
	}
	l = g_slist_reverse (l);
	while (l) {
		child = SP_OBJECT (l->data);
		l = g_slist_remove (l, child);
		if (flags || (child->mflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
			child->emitModified(flags);
		}
		g_object_unref (G_OBJECT (child));
	}
}

static Inkscape::XML::Node *
sp_flowregionexclude_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
{
    if (flags & SP_OBJECT_WRITE_BUILD) {
        if ( repr == NULL ) {
	    Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
            repr = xml_doc->createElement("svg:flowRegionExclude");
	}

        GSList *l = NULL;
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            Inkscape::XML::Node *crepr = child->updateRepr(NULL, flags);
            if (crepr) l = g_slist_prepend(l, crepr);
        }

        while (l) {
            repr->addChild((Inkscape::XML::Node *) l->data, NULL);
            Inkscape::GC::release((Inkscape::XML::Node *) l->data);
            l = g_slist_remove(l, l->data);
        }

    } else {
        for ( SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
            child->updateRepr(flags);
        }
    }

	if (((SPObjectClass *) (flowregionexclude_parent_class))->write)
		((SPObjectClass *) (flowregionexclude_parent_class))->write (object, repr, flags);
	
	return repr;
}


static gchar *sp_flowregionexclude_description(SPItem *item)
{
	/* TRANSLATORS: A region "cut out of" a flow region; text is not allowed to flow inside the
	 * flow excluded region.  flowRegionExclude in SVG 1.2: see
	 * http://www.w3.org/TR/2004/WD-SVG12-20041027/flow.html#flowRegion-elem and
	 * http://www.w3.org/TR/2004/WD-SVG12-20041027/flow.html#flowRegionExclude-elem. */
	return g_strdup_printf(_("Flow excluded region"));
}

/*
 *
 */

static void         UnionShape(Shape **base_shape, Shape const *add_shape)
{
    if (*base_shape == NULL)
        *base_shape = new Shape;
	if ( (*base_shape)->hasEdges() == false ) {
		(*base_shape)->Copy(const_cast<Shape*>(add_shape));
	} else if ( add_shape->hasEdges() ) {
		Shape* temp=new Shape;
		temp->Booleen(const_cast<Shape*>(add_shape), *base_shape, bool_op_union);
		delete *base_shape;
		*base_shape = temp;
	}
}

static void         GetDest(SPObject* child,Shape **computed,NR::Matrix itr_mat)
{
	if ( child == NULL ) return;

	SPCurve *curve=NULL;

	SPObject* u_child=child;
	if ( SP_IS_USE(u_child) ) {
		u_child=SP_USE(u_child)->child;
	}
	if ( SP_IS_SHAPE (u_child) ) {
		curve = sp_shape_get_curve (SP_SHAPE (u_child));
	} else if ( SP_IS_TEXT (u_child) ) {
	curve = SP_TEXT (u_child)->getNormalizedBpath ();
	}

	if ( curve ) {
		Path*   temp=new Path;
		NR::Matrix tr_mat=sp_item_i2root_affine (SP_ITEM(u_child));
		tr_mat=itr_mat*tr_mat;
		temp->LoadArtBPath(SP_CURVE_BPATH(curve),tr_mat,true);
		Shape*  n_shp=new Shape;
		temp->Convert(0.25);
		temp->Fill(n_shp,0);
		Shape*  uncross=new Shape;
		SPStyle* style=SP_OBJECT_STYLE(u_child);
		if ( style && style->fill_rule.computed == SP_WIND_RULE_EVENODD ) {
			uncross->ConvertToShape(n_shp,fill_oddEven);
		} else {
			uncross->ConvertToShape(n_shp,fill_nonZero);
		}
		UnionShape(computed, uncross);
		delete uncross;
		delete n_shp;
		delete temp;
		sp_curve_unref(curve);
	} else {
//		printf("no curve\n");
	}
}