#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include "display/sp-ctrlline.h"

#include "display/sp-canvas-util.h"

#include "display/cairo-utils.h"

#include "color.h"

#include "display/sp-canvas.h"

namespace {

void sp_ctrlline_class_init(SPCtrlLineClass *klass, gpointer data);

void sp_ctrlline_init(SPCtrlLine *ctrlline, gpointer g_class);

void sp_ctrlline_destroy(SPCanvasItem *object);

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

void sp_ctrlline_render(SPCanvasItem *item, SPCanvasBuf *buf);

SPCanvasItemClass *parent_class = 0;

} // namespace

GType SPCtrlLine::getType()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPCtrlLineClass),

NULL, NULL,

reinterpret_cast<GClassInitFunc>(sp_ctrlline_class_init),

NULL, NULL,

sizeof(SPCtrlLine),

0,

reinterpret_cast<GInstanceInitFunc>(sp_ctrlline_init),

NULL

};

type = g_type_register_static(SP_TYPE_CANVAS_ITEM, "SPCtrlLine", &info, static_cast<GTypeFlags>(0));

}

return type;

}

namespace {

void sp_ctrlline_class_init(SPCtrlLineClass *klass, gpointer /*data*/)

{

parent_class = reinterpret_cast<SPCanvasItemClass*>(g_type_class_peek_parent(klass));

klass->destroy = sp_ctrlline_destroy;

klass->update = sp_ctrlline_update;

klass->render = sp_ctrlline_render;

}

void sp_ctrlline_init(SPCtrlLine *ctrlline, gpointer /*g_class*/)

{

ctrlline->rgba = 0x0000ff7f;

ctrlline->s[Geom::X] = ctrlline->s[Geom::Y] = ctrlline->e[Geom::X] = ctrlline->e[Geom::Y] = 0.0;

ctrlline->item=NULL;

}

void sp_ctrlline_destroy(SPCanvasItem *object)

{

g_return_if_fail(object != NULL);

g_return_if_fail(SP_IS_CTRLLINE(object));

SPCtrlLine *ctrlline = SP_CTRLLINE(object);

ctrlline->item = NULL;

if(SP_CANVAS_ITEM_CLASS (parent_class)->destroy) {

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

}

}

void sp_ctrlline_render(SPCanvasItem *item, SPCanvasBuf *buf)

{

SPCtrlLine *cl = SP_CTRLLINE(item);

if (!buf->ct) {

return;

}

if (cl->s == cl->e) {

return;

}

Geom::Point s = cl->s * cl->affine;

Geom::Point e = cl->e * cl->affine;

ink_cairo_set_source_rgba32(buf->ct, 0xffffffbf);

cairo_set_line_width(buf->ct, 2);

cairo_new_path(buf->ct);

cairo_move_to(buf->ct, s[Geom::X] - buf->rect.left(), s[Geom::Y] - buf->rect.top());

cairo_line_to(buf->ct, e[Geom::X] - buf->rect.left(), e[Geom::Y] - buf->rect.top());

cairo_stroke(buf->ct);

ink_cairo_set_source_rgba32(buf->ct, cl->rgba);

cairo_set_line_width(buf->ct, 1);

cairo_new_path(buf->ct);

cairo_move_to(buf->ct, s[Geom::X] - buf->rect.left(), s[Geom::Y] - buf->rect.top());

cairo_line_to(buf->ct, e[Geom::X] - buf->rect.left(), e[Geom::Y] - buf->rect.top());

cairo_stroke(buf->ct);

}

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

{

SPCtrlLine *cl = SP_CTRLLINE(item);

item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);

if (parent_class->update) {

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

}

sp_canvas_item_reset_bounds(item);

cl->affine = affine;

if (cl->s == cl->e) {

item->x1 = item->x2 = item->y1 = item->y2 = 0;

} else {

Geom::Point s = cl->s * affine;

Geom::Point e = cl->e * affine;

item->x1 = round(MIN(s[Geom::X], e[Geom::X]) - 1);

item->y1 = round(MIN(s[Geom::Y], e[Geom::Y]) - 1);

item->x2 = round(MAX(s[Geom::X], e[Geom::X]) + 1);

item->y2 = round(MAX(s[Geom::Y], e[Geom::Y]) + 1);

item->canvas->requestRedraw(item->x1, item->y1, item->x2, item->y2);

}

}

} // namespace

void SPCtrlLine::setRgba32(guint32 rgba)

{

if (rgba != this->rgba) {

this->rgba = rgba;

canvas->requestRedraw(x1, y1, x2, y2);

}

}

#define EPSILON 1e-6

#define DIFFER(a,b) (fabs ((a) - (b)) > EPSILON)

void SPCtrlLine::setCoords(gdouble x0, gdouble y0, gdouble x1, gdouble y1)

{

if (DIFFER(x0, s[Geom::X]) || DIFFER(y0, s[Geom::Y]) || DIFFER(x1, e[Geom::X]) || DIFFER(y1, e[Geom::Y])) {

s[Geom::X] = x0;

s[Geom::Y] = y0;

e[Geom::X] = x1;

e[Geom::Y] = y1;

sp_canvas_item_request_update(this);

}

}

void SPCtrlLine::setCoords(Geom::Point const &start, Geom::Point const &end)

{

setCoords(start[0], start[1], end[0], end[1]);

}