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-rw-r--r--src/path/path-util.cpp199
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diff --git a/src/path/path-util.cpp b/src/path/path-util.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Path utilities.
+ *//*
+ * Authors:
+ * see git history
+ * Created by fred on Fri Dec 05 2003.
+ * tweaked endlessly by bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifdef HAVE_CONFIG_H
+#endif
+
+#include <vector>
+
+#include "path-util.h"
+
+#include "text-editing.h"
+
+#include "livarot/Path.h"
+#include "livarot/Shape.h"
+
+#include "object/sp-flowtext.h"
+#include "object/sp-image.h"
+#include "object/sp-marker.h"
+#include "object/sp-path.h"
+#include "object/sp-text.h"
+
+#include "display/curve.h"
+
+// derived from Path_for_item
+Path *
+Path_for_pathvector(Geom::PathVector const &epathv)
+{
+ /*std::cout << "converting to Livarot path" << std::endl;
+
+ Geom::SVGPathWriter wr;
+ wr.feed(epathv);
+ std::cout << wr.str() << std::endl;*/
+
+ Path *dest = new Path;
+ dest->LoadPathVector(epathv);
+ return dest;
+}
+
+Path *
+Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
+{
+ std::unique_ptr<SPCurve> curve = curve_for_item(item);
+
+ if (curve == nullptr)
+ return nullptr;
+
+ Geom::PathVector *pathv =
+ pathvector_for_curve(item, curve.get(), doTransformation, transformFull, Geom::identity(), Geom::identity());
+
+ /*std::cout << "converting to Livarot path" << std::endl;
+
+ Geom::SVGPathWriter wr;
+ if (pathv) {
+ wr.feed(*pathv);
+ }
+ std::cout << wr.str() << std::endl;*/
+
+ Path *dest = new Path;
+ dest->LoadPathVector(*pathv);
+ delete pathv;
+
+ /*gchar *str = dest->svg_dump_path();
+ std::cout << "After conversion:\n" << str << std::endl;
+ g_free(str);*/
+
+ return dest;
+}
+
+/**
+ * Obtains an item's Path before the LPE stack has been applied.
+ */
+Path *
+Path_for_item_before_LPE(SPItem *item, bool doTransformation, bool transformFull)
+{
+ std::unique_ptr<SPCurve> curve = curve_for_item_before_LPE(item);
+
+ if (curve == nullptr)
+ return nullptr;
+
+ Geom::PathVector *pathv =
+ pathvector_for_curve(item, curve.get(), doTransformation, transformFull, Geom::identity(), Geom::identity());
+
+ Path *dest = new Path;
+ dest->LoadPathVector(*pathv);
+ delete pathv;
+
+ return dest;
+}
+
+/*
+ * NOTE: Returns empty pathvector if curve == NULL
+ * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
+ */
+Geom::PathVector*
+pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, Geom::Affine extraPreAffine, Geom::Affine extraPostAffine)
+{
+ if (curve == nullptr)
+ return nullptr;
+
+ Geom::PathVector *dest = new Geom::PathVector;
+ *dest = curve->get_pathvector(); // Make a copy; must be freed by the caller!
+
+ if (doTransformation) {
+ if (transformFull) {
+ *dest *= extraPreAffine * item->i2doc_affine() * extraPostAffine;
+ } else {
+ *dest *= extraPreAffine * (Geom::Affine)item->transform * extraPostAffine;
+ }
+ } else {
+ *dest *= extraPreAffine * extraPostAffine;
+ }
+
+ return dest;
+}
+
+/**
+ * Obtains an item's curve. For SPPath, it is the path *before* LPE. For SPShapes other than path, it is the path *after* LPE.
+ * So the result is somewhat ill-defined, and probably this method should not be used... See curve_for_item_before_LPE.
+ */
+std::unique_ptr<SPCurve> curve_for_item(SPItem *item)
+{
+ if (!item)
+ return nullptr;
+
+ std::unique_ptr<SPCurve> curve;
+
+ if (auto path = dynamic_cast<SPPath const *>(item)) {
+ curve = SPCurve::copy(path->curveForEdit());
+ } else if (auto shape = dynamic_cast<SPShape const *>(item)) {
+ curve = SPCurve::copy(shape->curve());
+ } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
+ curve = te_get_layout(item)->convertToCurves();
+ } else if (auto image = dynamic_cast<SPImage const *>(item)) {
+ curve = image->get_curve();
+ }
+
+ return curve;
+}
+
+/**
+ * Obtains an item's curve *before* LPE.
+ */
+std::unique_ptr<SPCurve> curve_for_item_before_LPE(SPItem *item)
+{
+ if (!item)
+ return nullptr;
+
+ std::unique_ptr<SPCurve> curve;
+
+ if (auto shape = dynamic_cast<SPShape const *>(item)) {
+ curve = SPCurve::copy(shape->curveForEdit());
+ } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
+ curve = te_get_layout(item)->convertToCurves();
+ } else if (auto image = dynamic_cast<SPImage const *>(item)) {
+ curve = image->get_curve();
+ }
+
+ return curve;
+}
+
+std::optional<Path::cut_position> get_nearest_position_on_Path(Path *path, Geom::Point p, unsigned seg)
+{
+ std::optional<Path::cut_position> result;
+ if (!path) {
+ return result; // returns empty std::optional
+ }
+ //get nearest position on path
+ result = path->PointToCurvilignPosition(p, seg);
+ return result;
+}
+
+Geom::Point get_point_on_Path(Path *path, int piece, double t)
+{
+ Geom::Point p;
+ path->PointAt(piece, t, p);
+ return p;
+}
+
+
+/*
+ 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 :