#define __NR_ARENA_GROUP_C__

#include "display/canvas-bpath.h"

#include "display/nr-arena-group.h"

#include "display/nr-filter.h"

#include "display/nr-filter-types.h"

#include "style.h"

#include "sp-filter.h"

#include "sp-filter-reference.h"

#include "filters/blend.h"

#include "display/nr-filter-blend.h"

#include "helper/geom.h"

static void nr_arena_group_class_init (NRArenaGroupClass *klass);

static void nr_arena_group_init (NRArenaGroup *group);

static NRArenaItem *nr_arena_group_children (NRArenaItem *item);

static NRArenaItem *nr_arena_group_last_child (NRArenaItem *item);

static void nr_arena_group_add_child (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);

static void nr_arena_group_remove_child (NRArenaItem *item, NRArenaItem *child);

static void nr_arena_group_set_child_position (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref);

static unsigned int nr_arena_group_update (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset);

static unsigned int nr_arena_group_render (cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags);

static unsigned int nr_arena_group_clip (cairo_t *ct, NRArenaItem *item, NRRectL *area);

static NRArenaItem *nr_arena_group_pick (NRArenaItem *item, Geom::Point p, double delta, unsigned int sticky);

static NRArenaItemClass *parent_class;

nr_arena_group_get_type (void)

{

static NRType type = 0;

if (!type) {

type = nr_object_register_type (NR_TYPE_ARENA_ITEM,

"NRArenaGroup",

sizeof (NRArenaGroupClass),

sizeof (NRArenaGroup),

(void (*) (NRObjectClass *)) nr_arena_group_class_init,

(void (*) (NRObject *)) nr_arena_group_init);

}

return type;

}

static void

nr_arena_group_class_init (NRArenaGroupClass *klass)

{

NRObjectClass *object_class;

NRArenaItemClass *item_class;

object_class = (NRObjectClass *) klass;

item_class = (NRArenaItemClass *) klass;

parent_class = (NRArenaItemClass *) ((NRObjectClass *) klass)->parent;

object_class->cpp_ctor = NRObject::invoke_ctor<NRArenaGroup>;

item_class->children = nr_arena_group_children;

item_class->last_child = nr_arena_group_last_child;

item_class->add_child = nr_arena_group_add_child;

item_class->set_child_position = nr_arena_group_set_child_position;

item_class->remove_child = nr_arena_group_remove_child;

item_class->update = nr_arena_group_update;

item_class->render = nr_arena_group_render;

item_class->clip = nr_arena_group_clip;

item_class->pick = nr_arena_group_pick;

}

static void

nr_arena_group_init (NRArenaGroup *group)

{

group->transparent = FALSE;

group->children = NULL;

group->last = NULL;

group->style = NULL;

group->child_transform.setIdentity();

}

static NRArenaItem *

nr_arena_group_children (NRArenaItem *item)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

return group->children;

}

static NRArenaItem *

nr_arena_group_last_child (NRArenaItem *item)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

return group->last;

}

static void

nr_arena_group_add_child (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

if (!ref) {

group->children = nr_arena_item_attach (item, child, NULL, group->children);

} else {

ref->next = nr_arena_item_attach (item, child, ref, ref->next);

}

if (ref == group->last) group->last = child;

nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, FALSE);

}

static void

nr_arena_group_remove_child (NRArenaItem *item, NRArenaItem *child)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

if (child == group->last) group->last = child->prev;

if (child->prev) {

nr_arena_item_detach (item, child);

} else {

group->children = nr_arena_item_detach (item, child);

}

nr_arena_item_request_update (item, NR_ARENA_ITEM_STATE_ALL, FALSE);

}

static void

nr_arena_group_set_child_position (NRArenaItem *item, NRArenaItem *child, NRArenaItem *ref)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

if (child == group->last) group->last = child->prev;

if (child->prev) {

nr_arena_item_detach (item, child);

} else {

group->children = nr_arena_item_detach (item, child);

}

if (!ref) {

group->children = nr_arena_item_attach (item, child, NULL, group->children);

} else {

ref->next = nr_arena_item_attach (item, child, ref, ref->next);

}

if (ref == group->last) group->last = child;

nr_arena_item_request_render (child);

}

static unsigned int

nr_arena_group_update (NRArenaItem *item, NRRectL *area, NRGC *gc, unsigned int state, unsigned int reset)

{

unsigned int newstate;

NRArenaGroup *group = NR_ARENA_GROUP (item);

unsigned int beststate = NR_ARENA_ITEM_STATE_ALL;

for (NRArenaItem *child = group->children; child != NULL; child = child->next) {

NRGC cgc(gc);

cgc.transform = group->child_transform * gc->transform;

newstate = nr_arena_item_invoke_update (child, area, &cgc, state, reset);

beststate = beststate & newstate;

}

if (beststate & NR_ARENA_ITEM_STATE_BBOX) {

item->bbox = NR_RECT_L_EMPTY;

for (NRArenaItem *child = group->children; child != NULL; child = child->next) {

if (child->visible)

nr_rect_l_union (&item->bbox, &item->bbox, &child->drawbox);

}

}

return beststate;

}

void nr_arena_group_set_style (NRArenaGroup *group, SPStyle *style)

{

g_return_if_fail(group != NULL);

g_return_if_fail(NR_IS_ARENA_GROUP(group));

if (style) sp_style_ref(style);

if (group->style) sp_style_unref(group->style);

group->style = style;

//if group has a filter

if (style->filter.set && style->getFilter()) {

if (!group->filter) {

int primitives = sp_filter_primitive_count(SP_FILTER(style->getFilter()));

group->filter = new Inkscape::Filters::Filter(primitives);

}

sp_filter_build_renderer(SP_FILTER(style->getFilter()), group->filter);

} else {

//no filter set for this group

delete group->filter;

group->filter = NULL;

}

if (style && style->enable_background.set

&& style->enable_background.value == SP_CSS_BACKGROUND_NEW) {

group->background_new = true;

}

}

static unsigned int

nr_arena_group_render (cairo_t *ct, NRArenaItem *item, NRRectL *area, NRPixBlock *pb, unsigned int flags)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

unsigned int ret = item->state;

/* Just compose children into parent buffer */

for (NRArenaItem *child = group->children; child != NULL; child = child->next) {

ret = nr_arena_item_invoke_render (ct, child, area, pb, flags);

if (ret & NR_ARENA_ITEM_STATE_INVALID) break;

}

return ret;

}

static unsigned int

nr_arena_group_clip (cairo_t *ct, NRArenaItem *item, NRRectL *area)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

unsigned int ret = item->state;

cairo_save(ct);

// handle clip-rule

if (group->style) {

if (group->style->clip_rule.computed == SP_WIND_RULE_EVENODD) {

cairo_set_fill_rule(ct, CAIRO_FILL_RULE_EVEN_ODD);

} else {

cairo_set_fill_rule(ct, CAIRO_FILL_RULE_WINDING);

}

}

for (NRArenaItem *child = group->children; child != NULL; child = child->next) {

ret = nr_arena_item_invoke_clip (ct, child, area);

if (ret & NR_ARENA_ITEM_STATE_INVALID) break;

}

cairo_restore(ct);

return ret;

}

static NRArenaItem *

nr_arena_group_pick (NRArenaItem *item, Geom::Point p, double delta, unsigned int sticky)

{

NRArenaGroup *group = NR_ARENA_GROUP (item);

for (NRArenaItem *child = group->last; child != NULL; child = child->prev) {

NRArenaItem *picked = nr_arena_item_invoke_pick (child, p, delta, sticky);

if (picked)

return (group->transparent) ? picked : item;

}

return NULL;

}

nr_arena_group_set_transparent (NRArenaGroup *group, unsigned int transparent)

{

nr_return_if_fail (group != NULL);

nr_return_if_fail (NR_IS_ARENA_GROUP (group));

group->transparent = transparent;

}

void nr_arena_group_set_child_transform(NRArenaGroup *group, Geom::Affine const &t)

{

Geom::Affine nt(t);

nr_arena_group_set_child_transform(group, &nt);

}

void nr_arena_group_set_child_transform(NRArenaGroup *group, Geom::Affine const *t)

{

if (!t) t = &GEOM_MATRIX_IDENTITY;

if (!Geom::matrix_equalp(*t, group->child_transform, NR_EPSILON)) {

nr_arena_item_request_render (NR_ARENA_ITEM (group));

group->child_transform = *t;

nr_arena_item_request_update (NR_ARENA_ITEM (group), NR_ARENA_ITEM_STATE_ALL, TRUE);

}

}