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-rw-r--r--src/object/box3d-side.cpp274
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diff --git a/src/object/box3d-side.cpp b/src/object/box3d-side.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 3D box face implementation
+ *
+ * Authors:
+ * Maximilian Albert <Anhalter42@gmx.de>
+ * Abhishek Sharma
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2007 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "box3d-side.h"
+#include "document.h"
+#include "xml/document.h"
+#include "xml/repr.h"
+#include "display/curve.h"
+#include "svg/svg.h"
+#include "attributes.h"
+#include "inkscape.h"
+#include "object/persp3d.h"
+#include "object/persp3d-reference.h"
+#include "object/box3d.h"
+#include "ui/tools/box3d-tool.h"
+#include "desktop-style.h"
+
+static void box3d_side_compute_corner_ids(Box3DSide *side, unsigned int corners[4]);
+
+Box3DSide::Box3DSide() : SPPolygon() {
+ this->dir1 = Box3D::NONE;
+ this->dir2 = Box3D::NONE;
+ this->front_or_rear = Box3D::FRONT;
+}
+
+Box3DSide::~Box3DSide() = default;
+
+void Box3DSide::build(SPDocument * document, Inkscape::XML::Node * repr) {
+ SPPolygon::build(document, repr);
+
+ this->readAttr(SPAttr::INKSCAPE_BOX3D_SIDE_TYPE);
+}
+
+
+Inkscape::XML::Node* Box3DSide::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+ if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+ // this is where we end up when saving as plain SVG (also in other circumstances?)
+ // thus we don' set "sodipodi:type" so that the box is only saved as an ordinary svg:path
+ repr = xml_doc->createElement("svg:path");
+ }
+
+ if (flags & SP_OBJECT_WRITE_EXT) {
+ repr->setAttributeInt("inkscape:box3dsidetype", this->dir1 ^ this->dir2 ^ this->front_or_rear);
+ }
+
+ this->set_shape();
+
+ /* Duplicate the path */
+ SPCurve const *curve = this->_curve.get();
+
+ //Nulls might be possible if this called iteratively
+ if ( !curve ) {
+ return nullptr;
+ }
+
+ repr->setAttribute("d", sp_svg_write_path(curve->get_pathvector()));
+
+ SPPolygon::write(xml_doc, repr, flags);
+
+ return repr;
+}
+
+void Box3DSide::set(SPAttr key, const gchar* value) {
+ // TODO: In case the box was recreated (by undo, e.g.) we need to recreate the path
+ // (along with other info?) from the parent box.
+
+ /* fixme: we should really collect updates */
+ switch (key) {
+ case SPAttr::INKSCAPE_BOX3D_SIDE_TYPE:
+ if (value) {
+ guint desc = atoi (value);
+
+ if (!Box3D::is_face_id(desc)) {
+ g_print ("desc is not a face id: =%s=\n", value);
+ }
+
+ g_return_if_fail (Box3D::is_face_id (desc));
+
+ Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
+ plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
+ this->dir1 = Box3D::extract_first_axis_direction(plane);
+ this->dir2 = Box3D::extract_second_axis_direction(plane);
+ this->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);
+
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ }
+ break;
+ default:
+ SPPolygon::set(key, value);
+ break;
+ }
+}
+
+void Box3DSide::update(SPCtx* ctx, guint flags) {
+ if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
+ flags &= ~SP_OBJECT_USER_MODIFIED_FLAG_B; // since we change the description, it's not a "just translation" anymore
+ }
+
+ if (flags & (SP_OBJECT_MODIFIED_FLAG |
+ SP_OBJECT_STYLE_MODIFIED_FLAG |
+ SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
+
+ this->set_shape();
+ }
+
+ SPPolygon::update(ctx, flags);
+}
+
+/* Create a new Box3DSide and append it to the parent box */
+Box3DSide * Box3DSide::createBox3DSide(SPBox3D *box)
+{
+ Box3DSide *box3d_side = nullptr;
+ Inkscape::XML::Document *xml_doc = box->document->getReprDoc();;
+ Inkscape::XML::Node *repr_side = xml_doc->createElement("svg:path");
+ repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
+ box3d_side = static_cast<Box3DSide *>(box->appendChildRepr(repr_side));
+ return box3d_side;
+}
+
+/*
+ * Function which return the type attribute for Box3D.
+ * Acts as a replacement for directly accessing the XML Tree directly.
+ */
+int Box3DSide::getFaceId()
+{
+ return this->getIntAttribute("inkscape:box3dsidetype", -1);
+}
+
+void
+Box3DSide::position_set () {
+ this->set_shape();
+
+ // This call is responsible for live update of the sides during the initial drag
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+}
+
+void Box3DSide::set_shape() {
+ if (!this->document->getRoot()) {
+ // avoid a warning caused by sp_document_height() (which is called from sp_item_i2d_affine() below)
+ // when reading a file containing 3D boxes
+ return;
+ }
+
+ SPObject *parent = this->parent;
+
+ SPBox3D *box = dynamic_cast<SPBox3D *>(parent);
+ if (!box) {
+ g_warning("Parent of 3D box side is not a 3D box.\n");
+ return;
+ }
+
+ Persp3D *persp = this->perspective();
+
+ if (!persp) {
+ return;
+ }
+
+ // TODO: Draw the correct quadrangle here
+ // To do this, determine the perspective of the box, the orientation of the side (e.g., XY-FRONT)
+ // compute the coordinates of the corners in P^3, project them onto the canvas, and draw the
+ // resulting path.
+
+ unsigned int corners[4];
+ box3d_side_compute_corner_ids(this, corners);
+
+ auto c = std::make_unique<SPCurve>();
+
+ if (!box->get_corner_screen(corners[0]).isFinite() ||
+ !box->get_corner_screen(corners[1]).isFinite() ||
+ !box->get_corner_screen(corners[2]).isFinite() ||
+ !box->get_corner_screen(corners[3]).isFinite() )
+ {
+ g_warning ("Trying to draw a 3D box side with invalid coordinates.\n");
+ return;
+ }
+
+ c->moveto(box->get_corner_screen(corners[0]));
+ c->lineto(box->get_corner_screen(corners[1]));
+ c->lineto(box->get_corner_screen(corners[2]));
+ c->lineto(box->get_corner_screen(corners[3]));
+ c->closepath();
+
+ /* Reset the shape's curve to the "original_curve"
+ * This is very important for LPEs to work properly! (the bbox might be recalculated depending on the curve in shape)*/
+
+ SPCurve const *before = curveBeforeLPE();
+ if (before && before->get_pathvector() != c->get_pathvector()) {
+ setCurveBeforeLPE(std::move(c));
+ sp_lpe_item_update_patheffect(this, true, false);
+ return;
+ }
+
+ if (hasPathEffectOnClipOrMaskRecursive(this)) {
+ setCurveBeforeLPE(std::move(c));
+ return;
+ }
+
+ // This happends on undo, fix bug:#1791784
+ setCurveInsync(std::move(c));
+}
+
+Glib::ustring Box3DSide::axes_string() const
+{
+ Glib::ustring result(Box3D::string_from_axes((Box3D::Axis) (this->dir1 ^ this->dir2)));
+
+ switch ((Box3D::Axis) (this->dir1 ^ this->dir2)) {
+ case Box3D::XY:
+ result += ((this->front_or_rear == Box3D::FRONT) ? "front" : "rear");
+ break;
+
+ case Box3D::XZ:
+ result += ((this->front_or_rear == Box3D::FRONT) ? "top" : "bottom");
+ break;
+
+ case Box3D::YZ:
+ result += ((this->front_or_rear == Box3D::FRONT) ? "right" : "left");
+ break;
+
+ default:
+ break;
+ }
+
+ return result;
+}
+
+static void
+box3d_side_compute_corner_ids(Box3DSide *side, unsigned int corners[4]) {
+ Box3D::Axis orth = Box3D::third_axis_direction (side->dir1, side->dir2);
+
+ corners[0] = (side->front_or_rear ? orth : 0);
+ corners[1] = corners[0] ^ side->dir1;
+ corners[2] = corners[0] ^ side->dir1 ^ side->dir2;
+ corners[3] = corners[0] ^ side->dir2;
+}
+
+Persp3D *
+Box3DSide::perspective() const {
+ SPBox3D *box = dynamic_cast<SPBox3D *>(this->parent);
+ return box ? box->persp_ref->getObject() : nullptr;
+}
+
+Inkscape::XML::Node *Box3DSide::convert_to_path() const {
+ // TODO: Copy over all important attributes (see sp_selected_item_to_curved_repr() for an example)
+ SPDocument *doc = this->document;
+ Inkscape::XML::Document *xml_doc = doc->getReprDoc();
+
+ Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
+ repr->setAttribute("d", this->getAttribute("d"));
+ repr->setAttribute("style", this->getAttribute("style"));
+
+ return repr;
+}
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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