#include <libnr/nr-blit.h>

#include <gtk/gtksignal.h>

#include <display/sp-canvas-util.h>

#include "helper/sp-marshal.h"

#include <display/nr-arena.h>

#include <display/nr-arena-group.h>

#include <display/canvas-arena.h>

#include <display/inkscape-cairo.h>

enum {

ARENA_EVENT,

LAST_SIGNAL

};

static void sp_canvas_arena_class_init(SPCanvasArenaClass *klass);

static void sp_canvas_arena_init(SPCanvasArena *group);

static void sp_canvas_arena_destroy(GtkObject *object);

static void sp_canvas_arena_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);

static void sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf);

static double sp_canvas_arena_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);

static gint sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event);

static gint sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event);

static void sp_canvas_arena_request_update (NRArena *arena, NRArenaItem *item, void *data);

static void sp_canvas_arena_request_render (NRArena *arena, NRRectL *area, void *data);

NRArenaEventVector carenaev = {

{NULL},

sp_canvas_arena_request_update,

sp_canvas_arena_request_render

};

static SPCanvasItemClass *parent_class;

static guint signals[LAST_SIGNAL] = {0};

sp_canvas_arena_get_type (void)

{

static GtkType type = 0;

if (!type) {

GtkTypeInfo info = {

(gchar *)"SPCanvasArena",

sizeof (SPCanvasArena),

sizeof (SPCanvasArenaClass),

(GtkClassInitFunc) sp_canvas_arena_class_init,

(GtkObjectInitFunc) sp_canvas_arena_init,

NULL, NULL, NULL

};

type = gtk_type_unique (SP_TYPE_CANVAS_ITEM, &info);

}

return type;

}

static void

sp_canvas_arena_class_init (SPCanvasArenaClass *klass)

{

GtkObjectClass *object_class;

SPCanvasItemClass *item_class;

object_class = (GtkObjectClass *) klass;

item_class = (SPCanvasItemClass *) klass;

parent_class = (SPCanvasItemClass*)gtk_type_class (SP_TYPE_CANVAS_ITEM);

signals[ARENA_EVENT] = gtk_signal_new ("arena_event",

GTK_RUN_LAST,

GTK_CLASS_TYPE(object_class),

((glong)((guint8*)&(klass->arena_event) - (guint8*)klass)),

sp_marshal_INT__POINTER_POINTER,

GTK_TYPE_INT, 2, GTK_TYPE_POINTER, GTK_TYPE_POINTER);

object_class->destroy = sp_canvas_arena_destroy;

item_class->update = sp_canvas_arena_update;

item_class->render = sp_canvas_arena_render;

item_class->point = sp_canvas_arena_point;

item_class->event = sp_canvas_arena_event;

}

static void

sp_canvas_arena_init (SPCanvasArena *arena)

{

arena->sticky = FALSE;

arena->arena = NRArena::create();

arena->arena->canvasarena = arena;

arena->root = NRArenaGroup::create(arena->arena);

nr_arena_group_set_transparent (NR_ARENA_GROUP (arena->root), TRUE);

arena->active = NULL;

nr_active_object_add_listener ((NRActiveObject *) arena->arena, (NRObjectEventVector *) &carenaev, sizeof (carenaev), arena);

}

static void

sp_canvas_arena_destroy (GtkObject *object)

{

SPCanvasArena *arena = SP_CANVAS_ARENA (object);

if (arena->active) {

nr_object_unref ((NRObject *) arena->active);

arena->active = NULL;

}

if (arena->root) {

nr_arena_item_unref (arena->root);

arena->root = NULL;

}

if (arena->arena) {

nr_active_object_remove_listener_by_data ((NRActiveObject *) arena->arena, arena);

nr_object_unref ((NRObject *) arena->arena);

arena->arena = NULL;

}

if (GTK_OBJECT_CLASS (parent_class)->destroy)

(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);

}

static void

sp_canvas_arena_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)

{

SPCanvasArena *arena = SP_CANVAS_ARENA (item);

if (((SPCanvasItemClass *) parent_class)->update)

(* ((SPCanvasItemClass *) parent_class)->update) (item, affine, flags);

arena->gc.transform = affine;

guint reset;

reset = (flags & SP_CANVAS_UPDATE_AFFINE)? NR_ARENA_ITEM_STATE_ALL : NR_ARENA_ITEM_STATE_NONE;

nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_ALL, reset);

item->x1 = arena->root->bbox.x0 - 1;

item->y1 = arena->root->bbox.y0 - 1;

item->x2 = arena->root->bbox.x1 + 1;

item->y2 = arena->root->bbox.y1 + 1;

if (arena->cursor) {

/* Mess with enter/leave notifiers */

NRArenaItem *new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);

if (new_arena != arena->active) {

GdkEventCrossing ec;

ec.window = GTK_WIDGET (item->canvas)->window;

ec.send_event = TRUE;

ec.subwindow = ec.window;

ec.time = GDK_CURRENT_TIME;

ec.x = arena->c[Geom::X];

ec.y = arena->c[Geom::Y];

/* fixme: */

if (arena->active) {

ec.type = GDK_LEAVE_NOTIFY;

sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);

}

/* fixme: This is not optimal - better track ::destroy (Lauris) */

if (arena->active) nr_object_unref ((NRObject *) arena->active);

arena->active = new_arena;

if (arena->active) nr_object_ref ((NRObject *) arena->active);

if (arena->active) {

ec.type = GDK_ENTER_NOTIFY;

sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);

}

}

}

}

static void

sp_canvas_arena_render (SPCanvasItem *item, SPCanvasBuf *buf)

{

gint bw, bh;

SPCanvasArena *arena = SP_CANVAS_ARENA (item);

nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,

NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_RENDER,

NR_ARENA_ITEM_STATE_NONE);

sp_canvas_prepare_buffer(buf);

bw = buf->rect.x1 - buf->rect.x0;

bh = buf->rect.y1 - buf->rect.y0;

if ((bw < 1) || (bh < 1)) return;

NRRectL area;

NRPixBlock cb;

area.x0 = buf->rect.x0;

area.y0 = buf->rect.y0;

area.x1 = buf->rect.x1;

area.y1 = buf->rect.y1;

nr_pixblock_setup_extern (&cb, NR_PIXBLOCK_MODE_R8G8B8A8P, area.x0, area.y0, area.x1, area.y1,

buf->buf,

buf->buf_rowstride,

FALSE, FALSE);

cb.visible_area = buf->visible_rect;

cairo_t *ct = nr_create_cairo_context (&area, &cb);

nr_arena_item_invoke_render (ct, arena->root, &area, &cb, 0);

cairo_surface_t *cst = cairo_get_target(ct);

cairo_destroy (ct);

cairo_surface_finish (cst);

cairo_surface_destroy (cst);

nr_pixblock_release (&cb);

}

static double

sp_canvas_arena_point (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item)

{

SPCanvasArena *arena = SP_CANVAS_ARENA (item);

nr_arena_item_invoke_update (arena->root, NULL, &arena->gc,

NR_ARENA_ITEM_STATE_BBOX | NR_ARENA_ITEM_STATE_PICK,

NR_ARENA_ITEM_STATE_NONE);

NRArenaItem *picked = nr_arena_item_invoke_pick (arena->root, p, arena->arena->delta, arena->sticky);

arena->picked = picked;

if (picked) {

*actual_item = item;

return 0.0;

}

return 1e18;

}

static gint

sp_canvas_arena_event (SPCanvasItem *item, GdkEvent *event)

{

NRArenaItem *new_arena;

/* fixme: This sucks, we have to handle enter/leave notifiers */

SPCanvasArena *arena = SP_CANVAS_ARENA (item);

gint ret = FALSE;

switch (event->type) {

case GDK_ENTER_NOTIFY:

if (!arena->cursor) {

if (arena->active) {

//g_warning ("Cursor entered to arena with already active item");

nr_object_unref ((NRObject *) arena->active);

}

arena->cursor = TRUE;

/* TODO ... event -> arena transform? */

arena->c = Geom::Point(event->crossing.x, event->crossing.y);

/* fixme: Not sure abut this, but seems the right thing (Lauris) */

nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);

arena->active = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);

if (arena->active) nr_object_ref ((NRObject *) arena->active);

ret = sp_canvas_arena_send_event (arena, event);

}

break;

case GDK_LEAVE_NOTIFY:

if (arena->cursor) {

ret = sp_canvas_arena_send_event (arena, event);

if (arena->active) nr_object_unref ((NRObject *) arena->active);

arena->active = NULL;

arena->cursor = FALSE;

}

break;

case GDK_MOTION_NOTIFY:

/* TODO ... event -> arena transform? */

arena->c = Geom::Point(event->motion.x, event->motion.y);

/* fixme: Not sure abut this, but seems the right thing (Lauris) */

nr_arena_item_invoke_update (arena->root, NULL, &arena->gc, NR_ARENA_ITEM_STATE_PICK, NR_ARENA_ITEM_STATE_NONE);

new_arena = nr_arena_item_invoke_pick (arena->root, arena->c, arena->arena->delta, arena->sticky);

if (new_arena != arena->active) {

GdkEventCrossing ec;

ec.window = event->motion.window;

ec.send_event = event->motion.send_event;

ec.subwindow = event->motion.window;

ec.time = event->motion.time;

ec.x = event->motion.x;

ec.y = event->motion.y;

/* fixme: */

if (arena->active) {

ec.type = GDK_LEAVE_NOTIFY;

ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);

}

if (arena->active) nr_object_unref ((NRObject *) arena->active);

arena->active = new_arena;

if (arena->active) nr_object_ref ((NRObject *) arena->active);

if (arena->active) {

ec.type = GDK_ENTER_NOTIFY;

ret = sp_canvas_arena_send_event (arena, (GdkEvent *) &ec);

}

}

ret = sp_canvas_arena_send_event (arena, event);

break;

default:

/* Just send event */

ret = sp_canvas_arena_send_event (arena, event);

break;

}

return ret;

}

static gint

sp_canvas_arena_send_event (SPCanvasArena *arena, GdkEvent *event)

{

gint ret = FALSE;

/* Send event to arena */

gtk_signal_emit (GTK_OBJECT (arena), signals[ARENA_EVENT], arena->active, event, &ret);

return ret;

}

static void

sp_canvas_arena_request_update (NRArena */*arena*/, NRArenaItem */*item*/, void *data)

{

sp_canvas_item_request_update (SP_CANVAS_ITEM (data));

}

static void

sp_canvas_arena_request_render (NRArena */*arena*/, NRRectL *area, void *data)

{

sp_canvas_request_redraw (SP_CANVAS_ITEM (data)->canvas, area->x0, area->y0, area->x1, area->y1);

}

sp_canvas_arena_set_pick_delta (SPCanvasArena *ca, gdouble delta)

{

g_return_if_fail (ca != NULL);

g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

/* fixme: repick? */

ca->delta = delta;

}

sp_canvas_arena_set_sticky (SPCanvasArena *ca, gboolean sticky)

{

g_return_if_fail (ca != NULL);

g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

/* fixme: repick? */

ca->sticky = sticky;

}

sp_canvas_arena_render_pixblock (SPCanvasArena *ca, NRPixBlock *pb)

{

NRRectL area;

g_return_if_fail (ca != NULL);

g_return_if_fail (SP_IS_CANVAS_ARENA (ca));

/* fixme: */

pb->empty = FALSE;

area.x0 = pb->area.x0;

area.y0 = pb->area.y0;

area.x1 = pb->area.x1;

area.y1 = pb->area.y1;

nr_arena_item_invoke_render (NULL, ca->root, &area, pb, 0);

}