1 files changed, 341 insertions, 0 deletions
diff --git a/src/object/sp-path.cpp b/src/object/sp-path.cpp
new file mode 100644
index 0000000..0395397
--- /dev/null
+++ b/src/object/sp-path.cpp
@@ -0,0 +1,341 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SVG <path> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   David Turner <novalis@gnu.org>
+ *   Abhishek Sharma
+ *   Johan Engelen
+ *
+ * Copyright (C) 2004 David Turner
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 1999-2012 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glibmm/i18n.h>
+#include <glibmm/regex.h>
+
+#include "live_effects/effect.h"
+#include "live_effects/lpeobject.h"
+#include "live_effects/lpeobject-reference.h"
+#include "sp-lpe-item.h"
+
+#include "display/curve.h"
+#include <2geom/curves.h>
+#include "helper/geom-curves.h"
+
+#include "svg/svg.h"
+#include "xml/repr.h"
+#include "attributes.h"
+
+#include "sp-path.h"
+#include "sp-guide.h"
+
+#include "document.h"
+#include "desktop.h"
+
+#include "desktop-style.h"
+#include "ui/tools/tool-base.h"
+#include "inkscape.h"
+#include "style.h"
+
+#define noPATH_VERBOSE
+
+gint SPPath::nodesInPath() const
+{
+    return _curve ? _curve->nodes_in_path() : 0;
+}
+
+const char* SPPath::typeName() const {
+    return "path";
+}
+
+const char* SPPath::displayName() const {
+    return _("Path");
+}
+
+gchar* SPPath::description() const {
+    int count = this->nodesInPath();
+    char *lpe_desc = g_strdup("");
+    
+    if (hasPathEffect()) {
+        Glib::ustring s;
+        PathEffectList effect_list =  this->getEffectList();
+        
+        for (auto & it : effect_list)
+        {
+            LivePathEffectObject *lpeobj = it->lpeobject;
+            
+            if (!lpeobj || !lpeobj->get_lpe()) {
+                break;
+            }
+            
+            if (s.empty()) {
+                s = lpeobj->get_lpe()->getName();
+            } else {
+                s = s + ", " + lpeobj->get_lpe()->getName();
+            }
+        }
+        lpe_desc = g_strdup_printf(_(", path effect: %s"), s.c_str());
+    }
+    char *ret = g_strdup_printf(ngettext(
+                _("%i node%s"), _("%i nodes%s"), count), count, lpe_desc);
+    g_free(lpe_desc);
+    return ret;
+}
+
+void SPPath::convert_to_guides() const {
+    if (!this->_curve) {
+        return;
+    }
+
+    std::list<std::pair<Geom::Point, Geom::Point> > pts;
+
+    Geom::Affine const i2dt(this->i2dt_affine());
+    Geom::PathVector const & pv = this->_curve->get_pathvector();
+    
+    for(const auto & pit : pv) {
+        for(Geom::Path::const_iterator cit = pit.begin(); cit != pit.end_default(); ++cit) {
+            // only add curves for straight line segments
+            if( is_straight_curve(*cit) )
+            {
+                pts.emplace_back(cit->initialPoint() * i2dt, cit->finalPoint() * i2dt);
+            }
+        }
+    }
+
+    sp_guide_pt_pairs_to_guides(this->document, pts);
+}
+
+SPPath::SPPath() : SPShape(), connEndPair(this) {
+}
+
+SPPath::~SPPath() = default;
+
+void SPPath::build(SPDocument *document, Inkscape::XML::Node *repr) {
+    /* Are these calls actually necessary? */
+    this->readAttr(SPAttr::MARKER);
+    this->readAttr(SPAttr::MARKER_START);
+    this->readAttr(SPAttr::MARKER_MID);
+    this->readAttr(SPAttr::MARKER_END);
+
+    sp_conn_end_pair_build(this);
+
+    SPShape::build(document, repr);
+    // Our code depends on 'd' being an attribute (LPE's, etc.). To support 'd' as a property, we
+    // check it here (after the style property has been evaluated, this allows us to properly
+    // handled precedence of property vs attribute). If we read in a 'd' set by styling, convert it
+    // to an attribute. We'll convert it back on output.
+
+    d_source = style->d.style_src;
+
+    if (style->d.set &&
+
+        (d_source == SPStyleSrc::STYLE_PROP || d_source == SPStyleSrc::STYLE_SHEET) ) {
+
+        if (char const *d_val = style->d.value()) {
+            // Chrome shipped with a different syntax for property vs attribute.
+            // The SVG Working group decided to follow the Chrome syntax (which may
+            // allow future extensions of the 'd' property). The property syntax
+            // wraps the path data with "path(...)". We must strip that!
+
+            // Must be Glib::ustring or we get conversion errors!
+            Glib::ustring input = d_val;
+            Glib::ustring expression = R"A(path\("(.*)"\))A";
+            Glib::RefPtr<Glib::Regex> regex = Glib::Regex::create(expression);
+            Glib::MatchInfo matchInfo;
+            regex->match(input, matchInfo);
+
+            if (matchInfo.matches()) {
+                Glib::ustring  value = matchInfo.fetch(1);
+                Geom::PathVector pv = sp_svg_read_pathv(value.c_str());
+
+                auto curve = std::make_unique<SPCurve>(pv);
+                if (curve) {
+
+                    // Update curve
+                    setCurveInsync(std::move(curve));
+
+                    // Convert from property to attribute (convert back on write)
+                    setAttributeOrRemoveIfEmpty("d", value);
+
+                    SPCSSAttr *css = sp_repr_css_attr( getRepr(), "style");
+                    sp_repr_css_unset_property ( css, "d");
+                    sp_repr_css_set ( getRepr(), css, "style" );
+                    sp_repr_css_attr_unref ( css );
+
+                    style->d.style_src = SPStyleSrc::ATTRIBUTE;
+                } else {
+                    std::cerr << "SPPath::build: Failed to create curve: " << input << std::endl;
+                }
+            }
+        }
+        // If any if statement is false, do nothing... don't overwrite 'd' from attribute
+    }
+
+    this->readAttr(SPAttr::INKSCAPE_ORIGINAL_D);
+    this->readAttr(SPAttr::D);
+
+    /* d is a required attribute */
+    char const *d = this->getAttribute("d");
+
+    if (d == nullptr) {
+        // First see if calculating the path effect will generate "d":
+        this->update_patheffect(true);
+        d = this->getAttribute("d");
+
+        // I guess that didn't work, now we have nothing useful to write ("")
+        if (d == nullptr) {
+            this->setKeyValue( sp_attribute_lookup("d"), "");
+        }
+    }
+}
+
+void SPPath::release() {
+    this->connEndPair.release();
+
+    SPShape::release();
+}
+
+void SPPath::set(SPAttr key, const gchar* value) {
+    switch (key) {
+        case SPAttr::INKSCAPE_ORIGINAL_D:
+            if (value) {
+                Geom::PathVector pv = sp_svg_read_pathv(value);
+                setCurveBeforeLPE(std::make_unique<SPCurve>(pv));
+            } else {
+                this->setCurveBeforeLPE(nullptr);
+            }
+            break;
+
+       case SPAttr::D:
+            if (value) {
+                Geom::PathVector pv = sp_svg_read_pathv(value);
+                setCurve(std::make_unique<SPCurve>(pv));
+            } else {
+                this->setCurve(nullptr);
+            }
+            break;
+
+        case SPAttr::MARKER:
+            sp_shape_set_marker(this, SP_MARKER_LOC, value);
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+        case SPAttr::MARKER_START:
+            sp_shape_set_marker(this, SP_MARKER_LOC_START, value);
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+        case SPAttr::MARKER_MID:
+            sp_shape_set_marker(this, SP_MARKER_LOC_MID, value);
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+        case SPAttr::MARKER_END:
+            sp_shape_set_marker(this, SP_MARKER_LOC_END, value);
+            this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+            break;
+
+        case SPAttr::CONNECTOR_TYPE:
+        case SPAttr::CONNECTOR_CURVATURE:
+        case SPAttr::CONNECTION_START:
+        case SPAttr::CONNECTION_END:
+        case SPAttr::CONNECTION_START_POINT:
+        case SPAttr::CONNECTION_END_POINT:
+            this->connEndPair.setAttr(key, value);
+            break;
+
+        default:
+            SPShape::set(key, value);
+            break;
+    }
+}
+
+Inkscape::XML::Node* SPPath::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+        repr = xml_doc->createElement("svg:path");
+    }
+
+#ifdef PATH_VERBOSE
+g_message("sp_path_write writes 'd' attribute");
+#endif
+
+    if (this->_curve) {
+        repr->setAttribute("d", sp_svg_write_path(this->_curve->get_pathvector()));
+    } else {
+        repr->removeAttribute("d");
+    }
+
+    if (flags & SP_OBJECT_WRITE_EXT) {
+        if ( this->_curve_before_lpe != nullptr ) {
+            repr->setAttribute("inkscape:original-d", sp_svg_write_path(this->_curve_before_lpe->get_pathvector()));
+        } else {
+            repr->removeAttribute("inkscape:original-d");
+        }
+    }
+
+    this->connEndPair.writeRepr(repr);
+
+    SPShape::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+void SPPath::update_patheffect(bool write) {
+    SPShape::update_patheffect(write);
+}
+
+void SPPath::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
+    }
+
+    SPShape::update(ctx, flags);
+    this->connEndPair.update();
+}
+
+Geom::Affine SPPath::set_transform(Geom::Affine const &transform) {
+    if (!_curve) { // 0 nodes, nothing to transform
+        return Geom::identity();
+    }
+    if (pathEffectsEnabled() && !optimizeTransforms()) {
+        return transform;
+    }
+    if (hasPathEffectRecursive() && pathEffectsEnabled()) {
+        if (!_curve_before_lpe) {
+            // we are inside a LPE group creating a new element 
+            // and the original-d curve is not defined, 
+            // This fix a issue with calligrapic tool that make a transform just when draw
+            setCurveBeforeLPE(std::move(_curve));
+        }
+        _curve_before_lpe->transform(transform);
+        // fix issue https://gitlab.com/inkscape/inbox/-/issues/5460
+        sp_lpe_item_update_patheffect(this, false, false);
+    } else {
+        _curve->transform(transform);
+    }
+    // Adjust stroke
+    this->adjust_stroke(transform.descrim());
+
+    // Adjust pattern fill
+    this->adjust_pattern(transform);
+
+    // Adjust gradient fill
+    this->adjust_gradient(transform);
+
+    // nothing remains - we've written all of the transform, so return identity
+    return Geom::identity();
+}
+
+/*
+  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 :