Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 529 insertions, 0 deletions

diff --git a/src/object/sp-tspan.cpp b/src/object/sp-tspan.cpp
new file mode 100644
index 0000000..c3a43bc
--- /dev/null
+++ b/src/object/sp-tspan.cpp
@@ -0,0 +1,529 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SVG <text> and <tspan> implementation
+ *
+ * Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+/*
+ * fixme:
+ *
+ * These subcomponents should not be items, or alternately
+ * we have to invent set of flags to mark, whether standard
+ * attributes are applicable to given item (I even like this
+ * idea somewhat - Lauris)
+ *
+ */
+
+#include <cstring>
+#include <string>
+#include <glibmm/i18n.h>
+#include <glibmm/regex.h>
+
+#include "attributes.h"
+#include "document.h"
+#include "text-editing.h"
+
+#include "sp-textpath.h"
+#include "sp-tref.h"
+#include "sp-tspan.h"
+#include "sp-use-reference.h"
+#include "style.h"
+
+#include "display/curve.h"
+
+#include "livarot/Path.h"
+
+#include "svg/stringstream.h"
+
+
+/*#####################################################
+#  SPTSPAN
+#####################################################*/
+SPTSpan::SPTSpan() : SPItem() {
+    this->role = SP_TSPAN_ROLE_UNSPECIFIED;
+}
+
+SPTSpan::~SPTSpan() = default;
+
+void SPTSpan::build(SPDocument *doc, Inkscape::XML::Node *repr) {
+    this->readAttr(SPAttr::X);
+    this->readAttr(SPAttr::Y);
+    this->readAttr(SPAttr::DX);
+    this->readAttr(SPAttr::DY);
+    this->readAttr(SPAttr::ROTATE);
+
+    // Strip sodipodi:role from SVG 2 flowed text.
+    // this->role = SP_TSPAN_ROLE_UNSPECIFIED;
+    SPText* text = dynamic_cast<SPText *>(parent);
+    if (text && !(text->has_shape_inside()|| text->has_inline_size())) {
+        this->readAttr(SPAttr::SODIPODI_ROLE);
+    }
+
+    // We'll intercept "style" to strip "visibility" property (SVG 1.1 fallback for SVG 2 text) then pass it on.
+    this->readAttr(SPAttr::STYLE);
+
+    SPItem::build(doc, repr);
+}
+
+void SPTSpan::release() {
+    SPItem::release();
+}
+
+void SPTSpan::set(SPAttr key, const gchar* value) {
+    if (this->attributes.readSingleAttribute(key, value, style, &viewport)) {
+        this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+    } else {
+        switch (key) {
+            case SPAttr::SODIPODI_ROLE:
+                if (value && (!strcmp(value, "line") || !strcmp(value, "paragraph"))) {
+                    this->role = SP_TSPAN_ROLE_LINE;
+                } else {
+                    this->role = SP_TSPAN_ROLE_UNSPECIFIED;
+                }
+                break;
+                
+            case SPAttr::STYLE:
+                if (value) {
+                    Glib::ustring style(value);
+                    Glib::RefPtr<Glib::Regex> regex = Glib::Regex::create("visibility\\s*:\\s*hidden;*");
+                    Glib::ustring stripped = regex->replace_literal(style, 0, "", static_cast<Glib::RegexMatchFlags >(0));
+                    Inkscape::XML::Node *repr = getRepr();
+                    repr->setAttributeOrRemoveIfEmpty("style", stripped);
+                }
+                // Fall through
+            default:
+                SPItem::set(key, value);
+                break;
+        }
+    }
+}
+
+void SPTSpan::update(SPCtx *ctx, guint flags) {
+    unsigned childflags = flags;
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        childflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+    childflags &= SP_OBJECT_MODIFIED_CASCADE;
+
+    for (auto& ochild: children) {
+        if ( flags || ( ochild.uflags & SP_OBJECT_MODIFIED_FLAG )) {
+        	ochild.updateDisplay(ctx, childflags);
+        }
+    }
+
+    SPItem::update(ctx, flags);
+
+    if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG |
+                  SP_OBJECT_CHILD_MODIFIED_FLAG |
+                  SP_TEXT_LAYOUT_MODIFIED_FLAG   ) )
+    {
+        SPItemCtx const *ictx = reinterpret_cast<SPItemCtx const *>(ctx);
+
+        double const w = ictx->viewport.width();
+        double const h = ictx->viewport.height();
+        double const em = style->font_size.computed;
+        double const ex = 0.5 * em;  // fixme: get x height from pango or libnrtype.
+
+        attributes.update( em, ex, w, h );
+    }
+}
+
+void SPTSpan::modified(unsigned int flags) {
+//    SPItem::onModified(flags);
+
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+    
+    flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+    for (auto& ochild: children) {
+        if (flags || (ochild.mflags & SP_OBJECT_MODIFIED_FLAG)) {
+            ochild.emitModified(flags);
+        }
+    }
+}
+
+Geom::OptRect SPTSpan::bbox(Geom::Affine const &transform, SPItem::BBoxType type) const {
+    Geom::OptRect bbox;
+    // find out the ancestor text which holds our layout
+    SPObject const *parent_text = this;
+    
+    while (parent_text && !SP_IS_TEXT(parent_text)) {
+        parent_text = parent_text->parent;
+    }
+    
+    if (parent_text == nullptr) {
+        return bbox;
+    }
+
+    // get the bbox of our portion of the layout
+    return SP_TEXT(parent_text)->layout.bounds(transform,
+            type == SPItem::VISUAL_BBOX,
+            sp_text_get_length_upto(parent_text, this),
+            sp_text_get_length_upto(this, nullptr) - 1);
+}
+
+Inkscape::XML::Node* SPTSpan::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+        repr = xml_doc->createElement("svg:tspan");
+    }
+
+    this->attributes.writeTo(repr);
+
+    if ( flags&SP_OBJECT_WRITE_BUILD ) {
+        std::vector<Inkscape::XML::Node *> l;
+
+        for (auto& child: children) {
+            Inkscape::XML::Node* c_repr=nullptr;
+
+            if ( SP_IS_TSPAN(&child) || SP_IS_TREF(&child) ) {
+                c_repr = child.updateRepr(xml_doc, nullptr, flags);
+            } else if ( SP_IS_TEXTPATH(&child) ) {
+                //c_repr = child.updateRepr(xml_doc, NULL, flags); // shouldn't happen
+            } else if ( SP_IS_STRING(&child) ) {
+                c_repr = xml_doc->createTextNode(SP_STRING(&child)->string.c_str());
+            }
+
+            if ( c_repr ) {
+                l.push_back(c_repr);
+            }
+        }
+
+        for (auto i = l.rbegin(); i!= l.rend(); ++i) {
+            repr->addChild((*i), nullptr);
+            Inkscape::GC::release(*i);
+        }
+    } else {
+        for (auto& child: children) {
+            if ( SP_IS_TSPAN(&child) || SP_IS_TREF(&child) ) {
+                child.updateRepr(flags);
+            } else if ( SP_IS_TEXTPATH(&child) ) {
+                //c_repr = child->updateRepr(xml_doc, NULL, flags); // shouldn't happen
+            } else if ( SP_IS_STRING(&child) ) {
+                child.getRepr()->setContent(SP_STRING(&child)->string.c_str());
+            }
+        }
+    }
+
+    SPItem::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+const char* SPTSpan::typeName() const {
+    return "text-data";
+}
+
+const char* SPTSpan::displayName() const {
+    return _("Text Span");
+}
+
+
+/*#####################################################
+#  SPTEXTPATH
+#####################################################*/
+void   refresh_textpath_source(SPTextPath* offset);
+
+SPTextPath::SPTextPath() : SPItem() {
+    this->startOffset._set = false;
+    this->side = SP_TEXT_PATH_SIDE_LEFT;
+    this->originalPath = nullptr;
+    this->isUpdating=false;
+
+    // set up the uri reference
+    this->sourcePath = new SPUsePath(this);
+    this->sourcePath->user_unlink = sp_textpath_to_text;
+}
+
+SPTextPath::~SPTextPath() {
+	delete this->sourcePath;
+}
+
+void SPTextPath::build(SPDocument *doc, Inkscape::XML::Node *repr) {
+    this->readAttr(SPAttr::X);
+    this->readAttr(SPAttr::Y);
+    this->readAttr(SPAttr::DX);
+    this->readAttr(SPAttr::DY);
+    this->readAttr(SPAttr::ROTATE);
+    this->readAttr(SPAttr::STARTOFFSET);
+    this->readAttr(SPAttr::SIDE);
+    this->readAttr(SPAttr::XLINK_HREF);
+
+    this->readAttr(SPAttr::STYLE);
+
+    SPItem::build(doc, repr);
+}
+
+void SPTextPath::release() {
+    //this->attributes.~TextTagAttributes();
+
+    if (this->originalPath) {
+    	delete this->originalPath;
+    }
+
+    this->originalPath = nullptr;
+
+    SPItem::release();
+}
+
+void SPTextPath::set(SPAttr key, const gchar* value) {
+
+    if (this->attributes.readSingleAttribute(key, value, style, &viewport)) {
+        this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+    } else {
+        switch (key) {
+            case SPAttr::XLINK_HREF:
+                this->sourcePath->link((char*)value);
+                break;
+            case SPAttr::SIDE:
+                if (!value) {
+                    return;
+                }
+
+                if      (strncmp(value, "left",  4) == 0)
+                    side = SP_TEXT_PATH_SIDE_LEFT;
+                else if (strncmp(value, "right", 5) == 0)
+                    side = SP_TEXT_PATH_SIDE_RIGHT;
+                else {
+                    std::cerr << "SPTextPath: Bad side value: " << (value?value:"null") << std::endl;
+                    side = SP_TEXT_PATH_SIDE_LEFT;
+                }
+                break;
+            case SPAttr::STARTOFFSET:
+                this->startOffset.readOrUnset(value);
+                this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+                break;
+            default:
+                SPItem::set(key, value);
+                break;
+        }
+    }
+}
+
+void SPTextPath::update(SPCtx *ctx, guint flags) {
+    this->isUpdating = true;
+
+    if ( this->sourcePath->sourceDirty ) {
+        refresh_textpath_source(this);
+    }
+
+    this->isUpdating = false;
+
+    unsigned childflags = (flags & SP_OBJECT_MODIFIED_CASCADE);
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        childflags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+
+    for (auto& ochild: children) {
+        if (childflags || (ochild.uflags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG))) {
+            ochild.updateDisplay(ctx, childflags);
+        }
+    }
+
+    SPItem::update(ctx, flags);
+
+    if (flags & ( SP_OBJECT_STYLE_MODIFIED_FLAG |
+                  SP_OBJECT_CHILD_MODIFIED_FLAG |
+                  SP_TEXT_LAYOUT_MODIFIED_FLAG   ) )
+    {
+        SPItemCtx const *ictx = reinterpret_cast<SPItemCtx const *>(ctx);
+
+        double const w = ictx->viewport.width();
+        double const h = ictx->viewport.height();
+        double const em = style->font_size.computed;
+        double const ex = 0.5 * em;  // fixme: get x height from pango or libnrtype.
+
+        attributes.update( em, ex, w, h );
+    }
+}
+
+
+void refresh_textpath_source(SPTextPath* tp)
+{
+    if ( tp == nullptr ) {
+    	return;
+    }
+
+    tp->sourcePath->refresh_source();
+    tp->sourcePath->sourceDirty=false;
+
+    if ( tp->sourcePath->originalPath ) {
+        if (tp->originalPath) {
+            delete tp->originalPath;
+        }
+
+        std::unique_ptr<SPCurve> curve_copy;
+        if (tp->side == SP_TEXT_PATH_SIDE_LEFT) {
+            curve_copy = tp->sourcePath->originalPath->copy();
+        } else {
+            curve_copy = tp->sourcePath->originalPath->create_reverse();
+        }
+
+        SPItem *item = SP_ITEM(tp->sourcePath->sourceObject);
+        tp->originalPath = new Path;
+        tp->originalPath->LoadPathVector(curve_copy->get_pathvector(), item->transform, true);
+        tp->originalPath->ConvertWithBackData(0.01);
+    }
+}
+
+void SPTextPath::modified(unsigned int flags) {
+//    SPItem::onModified(flags);
+
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        flags |= SP_OBJECT_PARENT_MODIFIED_FLAG;
+    }
+
+    flags &= SP_OBJECT_MODIFIED_CASCADE;
+
+    for (auto& ochild: children) {
+        if (flags || (ochild.mflags & SP_OBJECT_MODIFIED_FLAG)) {
+            ochild.emitModified(flags);
+        }
+    }
+}
+
+Inkscape::XML::Node* SPTextPath::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
+    if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+        repr = xml_doc->createElement("svg:textPath");
+    }
+
+    this->attributes.writeTo(repr);
+
+    if (this->side == SP_TEXT_PATH_SIDE_RIGHT) {
+        this->setAttribute("side", "right");
+    }
+
+    if (this->startOffset._set) {
+        if (this->startOffset.unit == SVGLength::PERCENT) {
+	        Inkscape::SVGOStringStream os;
+            os << (this->startOffset.computed * 100.0) << "%";
+            this->setAttribute("startOffset", os.str());
+        } else {
+            /* FIXME: This logic looks rather undesirable if e.g. startOffset is to be
+               in ems. */
+            repr->setAttributeSvgDouble("startOffset", this->startOffset.computed);
+        }
+    }
+
+    if ( this->sourcePath->sourceHref ) {
+    	repr->setAttribute("xlink:href", this->sourcePath->sourceHref);
+    }
+
+    if ( flags & SP_OBJECT_WRITE_BUILD ) {
+        std::vector<Inkscape::XML::Node *> l;
+
+        for (auto& child: children) {
+            Inkscape::XML::Node* c_repr=nullptr;
+
+            if ( SP_IS_TSPAN(&child) || SP_IS_TREF(&child) ) {
+                c_repr = child.updateRepr(xml_doc, nullptr, flags);
+            } else if ( SP_IS_TEXTPATH(&child) ) {
+                //c_repr = child->updateRepr(xml_doc, NULL, flags); // shouldn't happen
+            } else if ( SP_IS_STRING(&child) ) {
+                c_repr = xml_doc->createTextNode(SP_STRING(&child)->string.c_str());
+            }
+
+            if ( c_repr ) {
+                l.push_back(c_repr);
+            }
+        }
+
+        for( auto i = l.rbegin(); i != l.rend(); ++i ) {
+            repr->addChild(*i, nullptr);
+            Inkscape::GC::release(*i);
+        }
+    } else {
+        for (auto& child: children) {
+            if ( SP_IS_TSPAN(&child) || SP_IS_TREF(&child) ) {
+                child.updateRepr(flags);
+            } else if ( SP_IS_TEXTPATH(&child) ) {
+                //c_repr = child.updateRepr(xml_doc, NULL, flags); // shouldn't happen
+            } else if ( SP_IS_STRING(&child) ) {
+                child.getRepr()->setContent(SP_STRING(&child)->string.c_str());
+            }
+        }
+    }
+
+    SPItem::write(xml_doc, repr, flags);
+
+    return repr;
+}
+
+
+SPItem *sp_textpath_get_path_item(SPTextPath *tp)
+{
+    if (tp && tp->sourcePath) {
+        SPItem *refobj = tp->sourcePath->getObject();
+
+        if (SP_IS_ITEM(refobj)) {
+            return refobj;
+        }
+    }
+    return nullptr;
+}
+
+void sp_textpath_to_text(SPObject *tp)
+{
+    SPObject *text = tp->parent;
+    
+    // make a list of textpath children
+    std::vector<Inkscape::XML::Node *> tp_reprs;
+
+    for (auto& o: tp->children) {
+        tp_reprs.push_back(o.getRepr());
+    }
+
+    for (auto i = tp_reprs.rbegin(); i != tp_reprs.rend(); ++i) {
+        // make a copy of each textpath child
+        Inkscape::XML::Node *copy = (*i)->duplicate(text->getRepr()->document());
+        // remove the old repr from under textpath
+        tp->getRepr()->removeChild(*i);
+        // put its copy under text
+        text->getRepr()->addChild(copy, nullptr); // fixme: copy id
+    }
+
+    // set x/y on text (to be near where it was when on path)
+    // Copied from Layout::fitToPathAlign
+    Path *path = dynamic_cast<SPTextPath*>(tp)->originalPath;
+    SVGLength const startOffset = dynamic_cast<SPTextPath*>(tp)->startOffset;
+    double offset = 0.0;
+    if (startOffset._set) {
+        if (startOffset.unit == SVGLength::PERCENT)
+            offset = startOffset.computed * path->Length();
+        else
+            offset = startOffset.computed;
+    }
+    int unused = 0;
+    Path::cut_position *cut_pos = path->CurvilignToPosition(1, &offset, unused);
+    Geom::Point midpoint;
+    Geom::Point tangent;
+    path->PointAndTangentAt(cut_pos[0].piece, cut_pos[0].t, midpoint, tangent);
+    text->getRepr()->setAttributeSvgDouble("x", midpoint[Geom::X]);
+    text->getRepr()->setAttributeSvgDouble("y", midpoint[Geom::Y]);
+
+    //remove textpath
+    tp->deleteObject();
+}
+
+
+/*
+  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 :