#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 "selection-chemistry.h"

#include "desktop-handles.h"

#include "snap.h"

#include "display/curve.h"

#include "desktop.h"

#include "message-context.h"

#include "pixmaps/cursor-3dbox.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 "preferences.h"

#include "context-fns.h"

#include "desktop-style.h"

#include "transf_mat_3x4.h"

#include "perspective-line.h"

#include "persp3d.h"

#include "box3d-side.h"

#include "document-private.h"

#include "line-geometry.h"

#include "shape-editor.h"

using Inkscape::DocumentUndo;

static void sp_box3d_context_class_init(Box3DContextClass *klass);

static void sp_box3d_context_init(Box3DContext *box3d_context);

static void sp_box3d_context_dispose(GObject *object);

static void sp_box3d_context_setup(SPEventContext *ec);

static void sp_box3d_context_finish(SPEventContext *ec);

static gint sp_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event);

static gint sp_box3d_context_item_handler(SPEventContext *event_context, SPItem *item, GdkEvent *event);

static void sp_box3d_drag(Box3DContext &bc, guint state);

static void sp_box3d_finish(Box3DContext *bc);

static SPEventContextClass *parent_class;

GtkType sp_box3d_context_get_type()

{

static GType type = 0;

if (!type) {

GTypeInfo info = {

sizeof(Box3DContextClass),

NULL, NULL,

(GClassInitFunc) sp_box3d_context_class_init,

NULL, NULL,

sizeof(Box3DContext),

4,

(GInstanceInitFunc) sp_box3d_context_init,

NULL, /* value_table */

};

type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "Box3DContext", &info, (GTypeFlags) 0);

}

return type;

}

static void sp_box3d_context_class_init(Box3DContextClass *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_box3d_context_dispose;

event_context_class->setup = sp_box3d_context_setup;

event_context_class->finish = sp_box3d_context_finish;

event_context_class->root_handler = sp_box3d_context_root_handler;

event_context_class->item_handler = sp_box3d_context_item_handler;

}

static void sp_box3d_context_init(Box3DContext *box3d_context)

{

SPEventContext *event_context = SP_EVENT_CONTEXT(box3d_context);

event_context->cursor_shape = cursor_3dbox_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;

box3d_context->item = NULL;

box3d_context->ctrl_dragged = false;

box3d_context->extruded = false;

box3d_context->_vpdrag = NULL;

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

}

static void sp_box3d_context_finish(SPEventContext *ec)

{

Box3DContext *bc = SP_BOX3D_CONTEXT(ec);

SPDesktop *desktop = ec->desktop;

sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), GDK_CURRENT_TIME);

sp_box3d_finish(bc);

bc->sel_changed_connection.disconnect();

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

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

}

}

static void sp_box3d_context_dispose(GObject *object)

{

Box3DContext *bc = SP_BOX3D_CONTEXT(object);

SPEventContext *ec = SP_EVENT_CONTEXT(object);

ec->enableGrDrag(false);

delete (bc->_vpdrag);

bc->_vpdrag = NULL;

bc->sel_changed_connection.disconnect();

bc->sel_changed_connection.~connection();

delete ec->shape_editor;

ec->shape_editor = NULL;

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

if (bc->item) {

sp_box3d_finish(bc);

}

if (bc->_message_context) {

delete bc->_message_context;

}

G_OBJECT_CLASS(parent_class)->dispose(object);

}

static void sp_box3d_context_selection_changed(Inkscape::Selection *selection, gpointer data)

{

Box3DContext *bc = SP_BOX3D_CONTEXT(data);

SPEventContext *ec = SP_EVENT_CONTEXT(bc);

ec->shape_editor->unset_item(SH_KNOTHOLDER);

SPItem *item = selection->singleItem();

ec->shape_editor->set_item(item, SH_KNOTHOLDER);

if (selection->perspList().size() == 1) {

// selecting a single box changes the current perspective

ec->desktop->doc()->setCurrentPersp3D(selection->perspList().front());

}

}

static void sp_box3d_context_ensure_persp_in_defs(SPDocument *document) {

SPDefs *defs = document->getDefs();

bool has_persp = false;

for ( SPObject *child = defs->firstChild(); child; child = child->getNext() ) {

if (SP_IS_PERSP3D(child)) {

has_persp = true;

break;

}

}

if (!has_persp) {

document->setCurrentPersp3D(persp3d_create_xml_element (document));

}

}

static void sp_box3d_context_setup(SPEventContext *ec)

{

Box3DContext *bc = SP_BOX3D_CONTEXT(ec);

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

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

}

ec->shape_editor = new ShapeEditor(ec->desktop);

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

if (item) {

ec->shape_editor->set_item(item, SH_KNOTHOLDER);

}

bc->sel_changed_connection.disconnect();

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

sigc::bind(sigc::ptr_fun(&sp_box3d_context_selection_changed), (gpointer)bc)

);

bc->_vpdrag = new Box3D::VPDrag(sp_desktop_document (ec->desktop));

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

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

ec->enableSelectionCue();

}

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

ec->enableGrDrag();

}

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

}

static gint sp_box3d_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 && !event_context->space_panning) {

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_box3d_context_root_handler(SPEventContext *event_context, GdkEvent *event)

{

static bool dragging;

SPDesktop *desktop = event_context->desktop;

SPDocument *document = sp_desktop_document (desktop);

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

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

int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);

Box3DContext *bc = SP_BOX3D_CONTEXT(event_context);

Persp3D *cur_persp = document->getCurrentPersp3D();

event_context->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);

gint ret = FALSE;

switch (event->type) {

case GDK_BUTTON_PRESS:

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

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

event->button.y);

Geom::Point button_dt(desktop->w2d(button_w));

// save drag origin

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

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

event_context->within_tolerance = true;

// remember clicked item, *not* disregarding groups (since a 3D box is a group), honoring Alt

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

dragging = true;

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

m.setup(desktop, true, bc->item);

m.freeSnapReturnByRef(button_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);

m.unSetup();

bc->center = from_2geom(button_dt);

bc->drag_origin = from_2geom(button_dt);

bc->drag_ptB = from_2geom(button_dt);

bc->drag_ptC = from_2geom(button_dt);

// This can happen after saving when the last remaining perspective was purged and must be recreated.

if (!cur_persp) {

sp_box3d_context_ensure_persp_in_defs(document);

cur_persp = document->getCurrentPersp3D();

}

/* Projective preimages of clicked point under current perspective */

bc->drag_origin_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(button_dt), 0, Proj::Z);

bc->drag_ptB_proj = bc->drag_origin_proj;

bc->drag_ptC_proj = bc->drag_origin_proj;

bc->drag_ptC_proj.normalize();

bc->drag_ptC_proj[Proj::Z] = 0.25;

sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),

( GDK_KEY_PRESS_MASK |

GDK_BUTTON_RELEASE_MASK |

GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |

GDK_BUTTON_PRESS_MASK ),

NULL, event->button.time);

ret = TRUE;

}

break;

case GDK_MOTION_NOTIFY:

if ( dragging

&& ( event->motion.state & GDK_BUTTON1_MASK ) && !event_context->space_panning)

{

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;

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

event->motion.y);

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

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

m.setup(desktop, true, bc->item);

m.freeSnapReturnByRef(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);

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

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

// once shift is pressed, set bc->extruded

bc->extruded = true;

}

if (!bc->extruded) {

bc->drag_ptB = from_2geom(motion_dt);

bc->drag_ptC = from_2geom(motion_dt);

bc->drag_ptB_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(motion_dt), 0, Proj::Z);

bc->drag_ptC_proj = bc->drag_ptB_proj;

bc->drag_ptC_proj.normalize();

bc->drag_ptC_proj[Proj::Z] = 0.25;

} else {

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

// perspective line from drag_ptB to vanishing point Y.

if (!bc->ctrl_dragged) {

/* snapping */

Box3D::PerspectiveLine pline (bc->drag_ptB, Proj::Z, document->getCurrentPersp3D());

bc->drag_ptC = pline.closest_to (from_2geom(motion_dt));

bc->drag_ptB_proj.normalize();

bc->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (bc->drag_ptC, bc->drag_ptB_proj[Proj::X], Proj::X);

} else {

bc->drag_ptC = from_2geom(motion_dt);

bc->drag_ptB_proj.normalize();

bc->drag_ptC_proj = cur_persp->perspective_impl->tmat.preimage (from_2geom(motion_dt), bc->drag_ptB_proj[Proj::X], Proj::X);

}

m.freeSnapReturnByRef(bc->drag_ptC, Inkscape::SNAPSOURCE_NODE_HANDLE);

}

m.unSetup();

sp_box3d_drag(*bc, event->motion.state);

ret = TRUE;

} else if (!sp_event_context_knot_mouseover(bc)) {

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

m.setup(desktop);

Geom::Point const motion_w(event->motion.x, event->motion.y);

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

m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE));

m.unSetup();

}

break;

case GDK_BUTTON_RELEASE:

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

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

dragging = false;

sp_event_context_discard_delayed_snap_event(event_context);

if (!event_context->within_tolerance) {

// we've been dragging, finish the box

sp_box3d_finish(bc);

} 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_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_bracketright:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::X, -180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

case GDK_bracketleft:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::X, 180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

case GDK_parenright:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Y, -180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

case GDK_parenleft:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Y, 180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

case GDK_braceright:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Z, -180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

case GDK_braceleft:

persp3d_rotate_VP (document->getCurrentPersp3D(), Proj::Z, 180/snaps, MOD__ALT);

DocumentUndo::done(document, SP_VERB_CONTEXT_3DBOX,

_("Change perspective (angle of PLs)"));

ret = true;

break;

/* TODO: what is this???

case GDK_g:

case GDK_G:

if (MOD__SHIFT_ONLY) {

sp_selection_to_guides(desktop);

ret = true;

}

break;

case GDK_p:

case GDK_P:

if (MOD__SHIFT_ONLY) {

if (document->getCurrentPersp3D()) {

persp3d_print_debugging_info (document->getCurrentPersp3D());

}

ret = true;

}

break;

case GDK_x:

case GDK_X:

if (MOD__ALT_ONLY) {

desktop->setToolboxFocusTo ("altx-box3d");

ret = TRUE;

}

if (MOD__SHIFT_ONLY) {

persp3d_toggle_VPs(selection->perspList(), Proj::X);

bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?

ret = true;

}

break;

case GDK_y:

case GDK_Y:

if (MOD__SHIFT_ONLY) {

persp3d_toggle_VPs(selection->perspList(), Proj::Y);

bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?

ret = true;

}

break;

case GDK_z:

case GDK_Z:

if (MOD__SHIFT_ONLY) {

persp3d_toggle_VPs(selection->perspList(), Proj::Z);

bc->_vpdrag->updateLines(); // FIXME: Shouldn't this be done automatically?

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;

sp_event_context_discard_delayed_snap_event(event_context);

if (!event_context->within_tolerance) {

// we've been dragging, finish the box

sp_box3d_finish(bc);

}

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

}

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_box3d_drag(Box3DContext &bc, guint /*state*/)

{

SPDesktop *desktop = bc.desktop;

if (!bc.item) {

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

return;

}

// Create object

SPBox3D *box3d = 0;

box3d = SPBox3D::createBox3D((SPItem *)desktop->currentLayer());

// Set style

desktop->applyCurrentOrToolStyle(box3d, "/tools/shapes/3dbox", false);

bc.item = box3d;

// TODO: Incorporate this in box3d-side.cpp!

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

Box3DSide *side = Box3DSide::createBox3DSide(box3d);

guint desc = Box3D::int_to_face(i);

Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);

plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));

side->dir1 = Box3D::extract_first_axis_direction(plane);

side->dir2 = Box3D::extract_second_axis_direction(plane);

side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);

// Set style

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

Glib::ustring descr = "/desktop/";

descr += box3d_side_axes_string(side);

descr += "/style";

Glib::ustring cur_style = prefs->getString(descr);

bool use_current = prefs->getBool("/tools/shapes/3dbox/usecurrent", false);

if (use_current && !cur_style.empty()) {

// use last used style

side->setAttribute("style", cur_style.data());

} else {

// use default style

GString *pstring = g_string_new("");

g_string_printf (pstring, "/tools/shapes/3dbox/%s", box3d_side_axes_string(side));

desktop->applyCurrentOrToolStyle (side, pstring->str, false);

}

side->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description

}

box3d_set_z_orders(SP_BOX3D(bc.item));

bc.item->updateRepr();

// TODO: It would be nice to show the VPs during dragging, but since there is no selection

// at this point (only after finishing the box), we must do this "manually"

/* bc._vpdrag->updateDraggers(); */

sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);

}

g_assert(bc.item);

SPBox3D *box = SP_BOX3D(bc.item);

box->orig_corner0 = bc.drag_origin_proj;

box->orig_corner7 = bc.drag_ptC_proj;

box3d_check_for_swapped_coords(box);

/* we need to call this from here (instead of from box3d_position_set(), for example)

box3d_set_z_orders (box);

box3d_position_set(box);

// status text

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

}

static void sp_box3d_finish(Box3DContext *bc)

{

bc->_message_context->clear();

bc->ctrl_dragged = false;

bc->extruded = false;

if ( bc->item != NULL ) {

SPDesktop * desktop = SP_EVENT_CONTEXT_DESKTOP(bc);

SPDocument *doc = sp_desktop_document(desktop);

if (!doc || !doc->getCurrentPersp3D())

return;

SPBox3D *box = SP_BOX3D(bc->item);

box->orig_corner0 = bc->drag_origin_proj;

box->orig_corner7 = bc->drag_ptC_proj;

box->updateRepr();

box3d_relabel_corners(box);

sp_canvas_end_forced_full_redraws(desktop->canvas);

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

DocumentUndo::done(sp_desktop_document(desktop), SP_VERB_CONTEXT_3DBOX,

_("Create 3D box"));

bc->item = NULL;

}

}

void sp_box3d_context_update_lines(SPEventContext *ec) {

/* update perspective lines if we are in the 3D box tool (so that infinite ones are shown correctly) */

if (SP_IS_BOX3D_CONTEXT (ec)) {

Box3DContext *bc = SP_BOX3D_CONTEXT (ec);

bc->_vpdrag->updateLines();

}

}