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-rw-r--r--src/object/sp-tspan.cpp538
1 files changed, 538 insertions, 0 deletions
diff --git a/src/object/sp-tspan.cpp b/src/object/sp-tspan.cpp
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+++ b/src/object/sp-tspan.cpp
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+// 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( "x" );
+ this->readAttr( "y" );
+ this->readAttr( "dx" );
+ this->readAttr( "dy" );
+ this->readAttr( "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( "sodipodi:role" );
+ }
+
+ // We'll intercept "style" to strip "visibility" property (SVG 1.1 fallback for SVG 2 text) then pass it on.
+ this->readAttr( "style" );
+
+ SPItem::build(doc, repr);
+}
+
+void SPTSpan::release() {
+ SPItem::release();
+}
+
+void SPTSpan::set(SPAttributeEnum key, const gchar* value) {
+ if (this->attributes.readSingleAttribute(key, value, style, &viewport)) {
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ } else {
+ switch (key) {
+ case SP_ATTR_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 SP_ATTR_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
+ bbox = SP_TEXT(parent_text)->layout.bounds(transform, sp_text_get_length_upto(parent_text, this), sp_text_get_length_upto(this, nullptr) - 1);
+
+ if (!bbox) {
+ return bbox;
+ }
+
+ // Add stroke width
+ // FIXME this code is incorrect
+ if (type == SPItem::VISUAL_BBOX && !this->style->stroke.isNone()) {
+ double scale = transform.descrim();
+ bbox->expandBy(0.5 * this->style->stroke_width.computed * scale);
+ }
+
+ return bbox;
+}
+
+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::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( "x" );
+ this->readAttr( "y" );
+ this->readAttr( "dx" );
+ this->readAttr( "dy" );
+ this->readAttr( "rotate" );
+ this->readAttr( "startOffset" );
+ this->readAttr( "side" );
+ this->readAttr( "xlink:href" );
+
+ this->readAttr( "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(SPAttributeEnum key, const gchar* value) {
+
+ if (this->attributes.readSingleAttribute(key, value, style, &viewport)) {
+ this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ } else {
+ switch (key) {
+ case SP_ATTR_XLINK_HREF:
+ this->sourcePath->link((char*)value);
+ break;
+ case SP_ATTR_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 SP_ATTR_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;
+
+ SPItem::update(ctx, 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.uflags & SP_OBJECT_MODIFIED_FLAG )) {
+ ochild.updateDisplay(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;
+ }
+
+ 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);
+
+ curve_copy->unref();
+ }
+}
+
+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. */
+ sp_repr_set_svg_double(repr, "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);
+ sp_repr_set_svg_double(text->getRepr(), "x", midpoint[Geom::X]);
+ sp_repr_set_svg_double(text->getRepr(), "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 :
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