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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /src/object/sp-tspan.cpp | |
parent | Initial commit. (diff) | |
download | inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/object/sp-tspan.cpp | 529 |
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 : |