#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <glibmm.h>

#include <gdk/gdk.h>

#include <2geom/transforms.h>

#include "macros.h"

#include "display/canvas-bpath.h"

#include "display/canvas-arena.h"

#include "display/curve.h"

#include "display/cairo-utils.h"

#include "svg/svg-color.h"

#include "color.h"

#include "color-rgba.h"

#include "desktop-style.h"

#include "preferences.h"

#include "sp-namedview.h"

#include "desktop.h"

#include "desktop-handles.h"

#include "selection.h"

#include "document.h"

#include "pixmaps/cursor-dropper.xpm"

#include "dropper-context.h"

#include "message-context.h"

using Inkscape::DocumentUndo;

static void sp_dropper_context_class_init(SPDropperContextClass *klass);

static void sp_dropper_context_init(SPDropperContext *dc);

static void sp_dropper_context_setup(SPEventContext *ec);

static void sp_dropper_context_finish(SPEventContext *ec);

static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent * event);

static SPEventContextClass *parent_class;

GType sp_dropper_context_get_type()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SPDropperContextClass),

NULL, NULL,

(GClassInitFunc) sp_dropper_context_class_init,

NULL, NULL,

sizeof(SPDropperContext),

4,

(GInstanceInitFunc) sp_dropper_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDropperContext", &info, (GTypeFlags) 0);

}

return type;

}

static void sp_dropper_context_class_init(SPDropperContextClass *klass)

{

SPEventContextClass *ec_class = (SPEventContextClass *) klass;

parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);

ec_class->setup = sp_dropper_context_setup;

ec_class->finish = sp_dropper_context_finish;

ec_class->root_handler = sp_dropper_context_root_handler;

}

static void sp_dropper_context_init(SPDropperContext *dc)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(dc);

event_context->cursor_shape = cursor_dropper_xpm;

event_context->hot_x = 7;

event_context->hot_y = 7;

}

static void sp_dropper_context_setup(SPEventContext *ec)

{

SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);

if (((SPEventContextClass *) parent_class)->setup) {

((SPEventContextClass *) parent_class)->setup(ec);

}

/* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */

SPCurve *c = new SPCurve();

const double C1 = 0.552;

c->moveto(-1,0);

c->curveto(-1, C1, -C1, 1, 0, 1 );

c->curveto(C1, 1, 1, C1, 1, 0 );

c->curveto(1, -C1, C1, -1, 0, -1 );

c->curveto(-C1, -1, -1, -C1, -1, 0 );

c->closepath();

dc->area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);

c->unref();

sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(dc->area), 0x00000000,(SPWindRule)0);

sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->area), 0x0000007f, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);

sp_canvas_item_hide(dc->area);

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

if (prefs->getBool("/tools/dropper/selcue")) {

ec->enableSelectionCue();

}

if (prefs->getBool("/tools/dropper/gradientdrag")) {

ec->enableGrDrag();

}

}

static void sp_dropper_context_finish(SPEventContext *ec)

{

SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);

ec->enableGrDrag(false);

if (dc->grabbed) {

sp_canvas_item_ungrab(dc->grabbed, GDK_CURRENT_TIME);

dc->grabbed = NULL;

}

if (dc->area) {

gtk_object_destroy(GTK_OBJECT(dc->area));

dc->area = NULL;

}

}

SPColor* sp_dropper_context_get_icc_color(SPEventContext */*ec*/)

{

//TODO: implement-me!

return 0; // At least we will cause a clean crash, instead of random corruption.

}

guint32 sp_dropper_context_get_color(SPEventContext *ec)

{

SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

int pick = prefs->getInt("/tools/dropper/pick",

SP_DROPPER_PICK_VISIBLE);

bool setalpha = prefs->getBool("/tools/dropper/setalpha", true);

return SP_RGBA32_F_COMPOSE(dc->R, dc->G, dc->B,

(pick == SP_DROPPER_PICK_ACTUAL && setalpha) ? dc->alpha : 1.0);

}

static gint sp_dropper_context_root_handler(SPEventContext *event_context, GdkEvent *event)

{

SPDropperContext *dc = (SPDropperContext *) event_context;

int ret = FALSE;

SPDesktop *desktop = event_context->desktop;

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE);

bool setalpha = prefs->getBool("/tools/dropper/setalpha", true);

switch (event->type) {

case GDK_BUTTON_PRESS:

if (event->button.button == 1 && !event_context->space_panning) {

dc->centre = Geom::Point(event->button.x, event->button.y);

dc->dragging = TRUE;

ret = TRUE;

}

sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),

GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK,

NULL, event->button.time);

dc->grabbed = SP_CANVAS_ITEM(desktop->acetate);

break;

case GDK_MOTION_NOTIFY:

if (event->motion.state & GDK_BUTTON2_MASK) {

// pass on middle-drag

ret = FALSE;

break;

} else if (!event_context->space_panning) {

// otherwise, constantly calculate color no matter is any button pressed or not

double rw = 0.0;

double R(0), G(0), B(0), A(0);

if (dc->dragging) {

// calculate average

// radius

rw = std::min(Geom::L2(Geom::Point(event->button.x, event->button.y) - dc->centre), 400.0);

if (rw == 0) { // happens sometimes, little idea why...

break;

}

Geom::Point const cd = desktop->w2d(dc->centre);

Geom::Affine const w2dt = desktop->w2d();

const double scale = rw * w2dt.descrim();

Geom::Affine const sm( Geom::Scale(scale, scale) * Geom::Translate(cd) );

sp_canvas_item_affine_absolute(dc->area, sm);

sp_canvas_item_show(dc->area);

/* Get buffer */

Geom::Rect r(dc->centre, dc->centre);

r.expandBy(rw);

if (!r.hasZeroArea()) {

Geom::IntRect area = r.roundOutwards();

cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, area.width(), area.height());

sp_canvas_arena_render_surface(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), s, area);

ink_cairo_surface_average_color_premul(s, R, G, B, A);

cairo_surface_destroy(s);

}

} else {

// pick single pixel

Geom::IntRect area = Geom::IntRect::from_xywh(floor(event->button.x), floor(event->button.y), 1, 1);

cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 1, 1);

sp_canvas_arena_render_surface(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), s, area);

ink_cairo_surface_average_color_premul(s, R, G, B, A);

cairo_surface_destroy(s);

}

if (pick == SP_DROPPER_PICK_VISIBLE) {

// compose with page color

guint32 bg = sp_desktop_namedview(desktop)->pagecolor;

R = R + (SP_RGBA32_R_F(bg)) * (1 - A);

G = G + (SP_RGBA32_G_F(bg)) * (1 - A);

B = B + (SP_RGBA32_B_F(bg)) * (1 - A);

A = 1.0;

} else {

// un-premultiply color channels

if (A > 0) {

R /= A;

G /= A;

B /= A;

}

}

if (fabs(A) < 1e-4) {

A = 0; // suppress exponentials, CSS does not allow that

}

// remember color

dc->R = R;

dc->G = G;

dc->B = B;

dc->alpha = A;

// status message

double alpha_to_set = setalpha? dc->alpha : 1.0;

guint32 c32 = SP_RGBA32_F_COMPOSE(R, G, B, alpha_to_set);

gchar c[64];

sp_svg_write_color(c, sizeof(c), c32);

// alpha of color under cursor, to show in the statusbar

// locale-sensitive printf is OK, since this goes to the UI, not into SVG

gchar *alpha = g_strdup_printf(_(" alpha %.3g"), alpha_to_set);

// where the color is picked, to show in the statusbar

gchar *where = dc->dragging ? g_strdup_printf(_(", averaged with radius %d"), (int) rw) : g_strdup_printf(_(" under cursor"));

// message, to show in the statusbar

const gchar *message = dc->dragging ? _("<b>Release mouse</b> to set color.") : _("<b>Click</b> to set fill, <b>Shift+click</b> to set stroke; <b>drag</b> to average color in area; with <b>Alt</b> to pick inverse color; <b>Ctrl+C</b> to copy the color under mouse to clipboard");

event_context->defaultMessageContext()->setF(

Inkscape::NORMAL_MESSAGE,

"<b>%s%s</b>%s. %s", c,

(pick == SP_DROPPER_PICK_VISIBLE)? "" : alpha,

where, message

);

g_free(where);

g_free(alpha);

ret = TRUE;

}

break;

case GDK_BUTTON_RELEASE:

if (event->button.button == 1 && !event_context->space_panning)

{

sp_canvas_item_hide(dc->area);

dc->dragging = FALSE;

if (dc->grabbed) {

sp_canvas_item_ungrab(dc->grabbed, event->button.time);

dc->grabbed = NULL;

}

double alpha_to_set = setalpha? dc->alpha : 1.0;

// do the actual color setting

sp_desktop_set_color(desktop,

(event->button.state & GDK_MOD1_MASK)?

ColorRGBA(1 - dc->R, 1 - dc->G, 1 - dc->B, alpha_to_set) : ColorRGBA(dc->R, dc->G, dc->B, alpha_to_set),

false, !(event->button.state & GDK_SHIFT_MASK));

// REJON: set aux. toolbar input to hex color!

if (!(sp_desktop_selection(desktop)->isEmpty())) {

DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_CONTEXT_DROPPER,

_("Set picked color"));

}

ret = TRUE;

}

break;

case GDK_KEY_PRESS:

switch (get_group0_keyval(&event->key)) {

case GDK_Up:

case GDK_Down:

case GDK_KP_Up:

case GDK_KP_Down:

// prevent the zoom field from activation

if (!MOD__CTRL_ONLY) {

ret = TRUE;

}

break;

case GDK_Escape:

sp_desktop_selection(desktop)->clear();

default:

break;

}

break;

default:

break;

}

if (!ret) {

if (((SPEventContextClass *) parent_class)->root_handler) {

ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);

}

}

return ret;

}