#define __SP_3DBOX_CONTEXT_C__

#include "config.h"

#include <gdk/gdkkeysyms.h>

#include "macros.h"

#include "display/sp-canvas.h"

#include "document.h"

#include "sp-namedview.h"

#include "selection.h"

#include "desktop-handles.h"

#include "snap.h"

#include "display/curve.h"

#include "desktop.h"

#include "message-context.h"

#include "pixmaps/cursor-rect.xpm"

#include "box3d.h"

#include "box3d-context.h"

#include "sp-metrics.h"

#include <glibmm/i18n.h>

#include "object-edit.h"

#include "xml/repr.h"

#include "xml/node-event-vector.h"

#include "prefs-utils.h"

#include "context-fns.h"

static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass);

static void sp_3dbox_context_init(SP3DBoxContext *box3d_context);

static void sp_3dbox_context_dispose(GObject *object);

static void sp_3dbox_context_setup(SPEventContext *ec);

static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val);

static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event);

static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);

static void sp_3dbox_drag(SP3DBoxContext &rc, guint state);

static void sp_3dbox_finish(SP3DBoxContext *rc);

static SPEventContextClass *parent_class;

GtkType sp_3dbox_context_get_type()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(SP3DBoxContextClass),

NULL, NULL,

(GClassInitFunc) sp_3dbox_context_class_init,

NULL, NULL,

sizeof(SP3DBoxContext),

4,

(GInstanceInitFunc) sp_3dbox_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SP3DBoxContext", &info, (GTypeFlags) 0);

}

return type;

}

static void sp_3dbox_context_class_init(SP3DBoxContextClass *klass)

{

GObjectClass *object_class = (GObjectClass *) klass;

SPEventContextClass *event_context_class = (SPEventContextClass *) klass;

parent_class = (SPEventContextClass *) g_type_class_peek_parent(klass);

object_class->dispose = sp_3dbox_context_dispose;

event_context_class->setup = sp_3dbox_context_setup;

event_context_class->set = sp_3dbox_context_set;

event_context_class->root_handler = sp_3dbox_context_root_handler;

event_context_class->item_handler = sp_3dbox_context_item_handler;

}

Box3D::Perspective3D * SP3DBoxContext::current_perspective = NULL;

guint SP3DBoxContext::number_of_handles = 3;

static void sp_3dbox_context_init(SP3DBoxContext *box3d_context)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);

event_context->cursor_shape = cursor_rect_xpm;

event_context->hot_x = 4;

event_context->hot_y = 4;

event_context->xp = 0;

event_context->yp = 0;

event_context->tolerance = 0;

event_context->within_tolerance = false;

event_context->item_to_select = NULL;

event_context->shape_repr = NULL;

event_context->shape_knot_holder = NULL;

box3d_context->item = NULL;

box3d_context->rx = 0.0;

box3d_context->ry = 0.0;

box3d_context->ctrl_dragged = false;

box3d_context->extruded = false;

/* create an initial perspective */

if (!SP3DBoxContext::current_perspective) {

SP3DBoxContext::current_perspective = new Box3D::Perspective3D (

// VP in x-direction

Box3D::VanishingPoint( NR::Point( 50.0, 600.0),

NR::Point( -1.0, 0.0), Box3D::VP_INFINITE),

// VP in y-direction

Box3D::VanishingPoint( NR::Point(500.0,1000.0),

NR::Point( 0.0, 1.0), Box3D::VP_INFINITE),

// VP in z-direction

Box3D::VanishingPoint( NR::Point(700.0, 500.0),

NR::Point(sqrt(3.0),1.0), Box3D::VP_INFINITE));

}

new (&box3d_context->sel_changed_connection) sigc::connection();

}

static void sp_3dbox_context_dispose(GObject *object)

{

SP3DBoxContext *rc = SP_3DBOX_CONTEXT(object);

SPEventContext *ec = SP_EVENT_CONTEXT(object);

ec->enableGrDrag(false);

rc->sel_changed_connection.disconnect();

rc->sel_changed_connection.~connection();

/* fixme: This is necessary because we do not grab */

if (rc->item) {

sp_3dbox_finish(rc);

}

if (ec->shape_knot_holder) {

sp_knot_holder_destroy(ec->shape_knot_holder);

ec->shape_knot_holder = NULL;

}

if (ec->shape_repr) { // remove old listener

sp_repr_remove_listener_by_data(ec->shape_repr, ec);

Inkscape::GC::release(ec->shape_repr);

ec->shape_repr = 0;

}

if (rc->_message_context) {

delete rc->_message_context;

}

G_OBJECT_CLASS(parent_class)->dispose(object);

}

static Inkscape::XML::NodeEventVector ec_shape_repr_events = {

NULL, /* child_added */

NULL, /* child_removed */

ec_shape_event_attr_changed,

NULL, /* content_changed */

NULL /* order_changed */

};

void sp_3dbox_context_selection_changed(Inkscape::Selection *selection, gpointer data)

{

SP3DBoxContext *rc = SP_3DBOX_CONTEXT(data);

SPEventContext *ec = SP_EVENT_CONTEXT(rc);

if (ec->shape_knot_holder) { // destroy knotholder

sp_knot_holder_destroy(ec->shape_knot_holder);

ec->shape_knot_holder = NULL;

}

if (ec->shape_repr) { // remove old listener

sp_repr_remove_listener_by_data(ec->shape_repr, ec);

Inkscape::GC::release(ec->shape_repr);

ec->shape_repr = 0;

}

SPItem *item = selection->singleItem();

if (item) {

ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);

Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);

if (shape_repr) {

ec->shape_repr = shape_repr;

Inkscape::GC::anchor(shape_repr);

sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);

}

}

}

static void sp_3dbox_context_setup(SPEventContext *ec)

{

SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);

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

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

}

SPItem *item = sp_desktop_selection(ec->desktop)->singleItem();

if (item) {

ec->shape_knot_holder = sp_item_knot_holder(item, ec->desktop);

Inkscape::XML::Node *shape_repr = SP_OBJECT_REPR(item);

if (shape_repr) {

ec->shape_repr = shape_repr;

Inkscape::GC::anchor(shape_repr);

sp_repr_add_listener(shape_repr, &ec_shape_repr_events, ec);

}

}

rc->sel_changed_connection.disconnect();

rc->sel_changed_connection = sp_desktop_selection(ec->desktop)->connectChanged(

sigc::bind(sigc::ptr_fun(&sp_3dbox_context_selection_changed), (gpointer)rc)

);

sp_event_context_read(ec, "rx");

sp_event_context_read(ec, "ry");

if (prefs_get_int_attribute("tools.shapes", "selcue", 0) != 0) {

ec->enableSelectionCue();

}

if (prefs_get_int_attribute("tools.shapes", "gradientdrag", 0) != 0) {

ec->enableGrDrag();

}

rc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());

}

static void sp_3dbox_context_set(SPEventContext *ec, gchar const *key, gchar const *val)

{

SP3DBoxContext *rc = SP_3DBOX_CONTEXT(ec);

/* fixme: Proper error handling for non-numeric data. Use a locale-independent function like

if ( strcmp(key, "rx") == 0 ) {

rc->rx = ( val

? g_ascii_strtod (val, NULL)

: 0.0 );

} else if ( strcmp(key, "ry") == 0 ) {

rc->ry = ( val

? g_ascii_strtod (val, NULL)

: 0.0 );

}

}

static gint sp_3dbox_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event)

{

SPDesktop *desktop = event_context->desktop;

gint ret = FALSE;

switch (event->type) {

case GDK_BUTTON_PRESS:

if ( event->button.button == 1 ) {

Inkscape::setup_for_drag_start(desktop, event_context, event);

ret = TRUE;

}

break;

// motion and release are always on root (why?)

default:

break;

}

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

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

}

return ret;

}

static gint sp_3dbox_context_root_handler(SPEventContext *event_context, GdkEvent *event)

{

static bool dragging;

SPDesktop *desktop = event_context->desktop;

Inkscape::Selection *selection = sp_desktop_selection (desktop);

SP3DBoxContext *rc = SP_3DBOX_CONTEXT(event_context);

event_context->tolerance = prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100);

gint ret = FALSE;

switch (event->type) {

case GDK_BUTTON_PRESS:

if ( event->button.button == 1 ) {

NR::Point const button_w(event->button.x,

event->button.y);

// save drag origin

event_context->xp = (gint) button_w[NR::X];

event_context->yp = (gint) button_w[NR::Y];

event_context->within_tolerance = true;

// remember clicked item, disregarding groups, honoring Alt

event_context->item_to_select = sp_event_context_find_item (desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);

dragging = true;

/* Position center */

NR::Point const button_dt(desktop->w2d(button_w));

rc->drag_origin = button_dt;

rc->drag_ptB = button_dt;

rc->drag_ptC = button_dt;

/* Snap center */

SnapManager const &m = desktop->namedview->snap_manager;

rc->center = m.freeSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,

button_dt, rc->item).getPoint();

sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),

( GDK_KEY_PRESS_MASK |

GDK_BUTTON_RELEASE_MASK |

GDK_POINTER_MOTION_MASK |

GDK_BUTTON_PRESS_MASK ),

NULL, event->button.time);

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

if ( dragging

&& ( event->motion.state & GDK_BUTTON1_MASK ) )

{

if ( event_context->within_tolerance

&& ( abs( (gint) event->motion.x - event_context->xp ) < event_context->tolerance )

&& ( abs( (gint) event->motion.y - event_context->yp ) < event_context->tolerance ) ) {

break; // do not drag if we're within tolerance from origin

}

// Once the user has moved farther than tolerance from the original location

// (indicating they intend to draw, not click), then always process the

// motion notify coordinates as given (no snapping back to origin)

event_context->within_tolerance = false;

NR::Point const motion_w(event->motion.x,

event->motion.y);

NR::Point motion_dt(desktop->w2d(motion_w));

SnapManager const &m = desktop->namedview->snap_manager;

motion_dt = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, motion_dt, rc->item).getPoint();

rc->ctrl_dragged = event->motion.state & GDK_CONTROL_MASK;

if (event->motion.state & GDK_SHIFT_MASK && !rc->extruded) {

/* once shift is pressed, set rc->extruded and create the remaining faces */

rc->extruded = true;

/* The separate faces */

SP3DBox *box3d = SP_3DBOX(rc->item);

for (int i = 0; i < 6; ++i) {

if (i == 4 || box3d->faces[i]) continue;

box3d->faces[i] = new Box3DFace (box3d);

box3d->faces[i]->hook_path_to_3dbox();

}

}

if (!rc->extruded) {

rc->drag_ptB = motion_dt;

} else {

// Without Ctrl, motion of the extruded corner is constrained to the

// perspective line from drag_ptB to vanishing point Y.

if (!rc->ctrl_dragged) {

rc->drag_ptC = Box3D::perspective_line_snap (rc->drag_ptB, Box3D::Z, motion_dt);

} else {

rc->drag_ptC = motion_dt;

}

rc->drag_ptC = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, rc->drag_ptC, rc->item).getPoint();

if (rc->ctrl_dragged) {

Box3D::PerspectiveLine pl1 (NR::Point (event_context->xp, event_context->yp), Box3D::Y);

Box3D::PerspectiveLine pl2 (rc->drag_ptB, Box3D::X);

NR::Point corner1 = pl1.meet(pl2);

Box3D::PerspectiveLine pl3 (corner1, Box3D::X);

Box3D::PerspectiveLine pl4 (rc->drag_ptC, Box3D::Z);

rc->drag_ptB = pl3.meet(pl4);

}

}

sp_3dbox_drag(*rc, event->motion.state);

ret = TRUE;

}

ret = TRUE;

break;

case GDK_BUTTON_RELEASE:

event_context->xp = event_context->yp = 0;

if ( event->button.button == 1 ) {

dragging = false;

if (!event_context->within_tolerance) {

// we've been dragging, finish the box

sp_3dbox_finish(rc);

} else if (event_context->item_to_select) {

// no dragging, select clicked item if any

if (event->button.state & GDK_SHIFT_MASK) {

selection->toggle(event_context->item_to_select);

} else {

selection->set(event_context->item_to_select);

}

} else {

// click in an empty space

selection->clear();

}

event_context->item_to_select = NULL;

ret = TRUE;

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),

event->button.time);

}

break;

case GDK_KEY_PRESS:

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

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt (at least on my machine)

case GDK_Meta_R:

/***

break;

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_x:

case GDK_X:

if (MOD__ALT_ONLY) {

// desktop->setToolboxFocusTo ("altx-rect");

ret = TRUE;

}

break;

case GDK_Escape:

sp_desktop_selection(desktop)->clear();

//TODO: make dragging escapable by Esc

break;

case GDK_space:

if (dragging) {

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),

event->button.time);

dragging = false;

if (!event_context->within_tolerance) {

// we've been dragging, finish the box

sp_3dbox_finish(rc);

}

// do not return true, so that space would work switching to selector

}

break;

default:

break;

}

break;

case GDK_KEY_RELEASE:

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

case GDK_Alt_L:

case GDK_Alt_R:

case GDK_Control_L:

case GDK_Control_R:

case GDK_Shift_L:

case GDK_Shift_R:

case GDK_Meta_L: // Meta is when you press Shift+Alt

case GDK_Meta_R:

event_context->defaultMessageContext()->clear();

break;

default:

break;

}

break;

default:

break;

}

if (!ret) {

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

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

}

}

return ret;

}

static void sp_3dbox_drag(SP3DBoxContext &bc, guint state)

{

SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;

if (!bc.item) {

if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {

return;

}

/* Create object */

Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));

Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");

repr->setAttribute("sodipodi:type", "inkscape:3dbox");

/* Set style */

//sp_desktop_apply_style_tool (desktop, repr, "tools.shapes.3dbox", false);

bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);

Inkscape::GC::release(repr);

bc.item->transform = SP_ITEM(desktop->currentRoot())->getRelativeTransform(desktop->currentLayer());

/* Hook path to the only currenctly existing face */

SP_3DBOX(bc.item)->faces[4]->hook_path_to_3dbox();

bc.item->updateRepr();

sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);

}

// FIXME: remove these extra points

NR::Point pt = bc.drag_ptB;

NR::Point shift_pt = bc.drag_ptC;

NR::Rect r;

if (!(state & GDK_SHIFT_MASK)) {

r = Inkscape::snap_rectangular_box(desktop, bc.item, pt, bc.center, state);

} else {

r = Inkscape::snap_rectangular_box(desktop, bc.item, shift_pt, bc.center, state);

}

SPEventContext *ec = SP_EVENT_CONTEXT(&bc);

NR::Point origin_w(ec->xp, ec->yp);

NR::Point origin(desktop->w2d(origin_w));

sp_3dbox_position_set(bc);

// status text

//GString *Ax = SP_PX_TO_METRIC_STRING(origin[NR::X], desktop->namedview->getDefaultMetric());

//GString *Ay = SP_PX_TO_METRIC_STRING(origin[NR::Y], desktop->namedview->getDefaultMetric());

bc._message_context->setF(Inkscape::NORMAL_MESSAGE, _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));

//g_string_free(Ax, FALSE);

//g_string_free(Ay, FALSE);

}

static void sp_3dbox_finish(SP3DBoxContext *rc)

{

rc->_message_context->clear();

if ( rc->item != NULL ) {

SPDesktop * desktop;

desktop = SP_EVENT_CONTEXT_DESKTOP(rc);

SP_OBJECT(rc->item)->updateRepr();

sp_canvas_end_forced_full_redraws(desktop->canvas);

sp_desktop_selection(desktop)->set(rc->item);

sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,

_("Create 3d box"));

rc->item = NULL;

}

rc->ctrl_dragged = false;

rc->extruded = false;

}