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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SVG <font> element implementation
*
* Author:
* Felipe C. da S. Sanches <juca@members.fsf.org>
* Abhishek Sharma
*
* Copyright (C) 2008, Felipe C. da S. Sanches
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "xml/repr.h"
#include "attributes.h"
#include "sp-font.h"
#include "document.h"
#include "display/nr-svgfonts.h"
//I think we should have extra stuff here and in the set method in order to set default value as specified at http://www.w3.org/TR/SVG/fonts.html
// TODO determine better values and/or make these dynamic:
double FNT_DEFAULT_ADV = 1024; // TODO determine proper default
double FNT_DEFAULT_ASCENT = 768; // TODO determine proper default
double FNT_UNITS_PER_EM = 1024; // TODO determine proper default
SPFont::SPFont() : SPObject() {
this->horiz_origin_x = 0;
this->horiz_origin_y = 0;
this->horiz_adv_x = FNT_DEFAULT_ADV;
this->vert_origin_x = FNT_DEFAULT_ADV / 2.0;
this->vert_origin_y = FNT_DEFAULT_ASCENT;
this->vert_adv_y = FNT_UNITS_PER_EM;
}
SPFont::~SPFont() = default;
void SPFont::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPObject::build(document, repr);
this->readAttr( "horiz-origin-x" );
this->readAttr( "horiz-origin-y" );
this->readAttr( "horiz-adv-x" );
this->readAttr( "vert-origin-x" );
this->readAttr( "vert-origin-y" );
this->readAttr( "vert-adv-y" );
document->addResource("font", this);
}
/**
* Callback for child_added event.
*/
void SPFont::child_added(Inkscape::XML::Node *child, Inkscape::XML::Node *ref) {
SPObject::child_added(child, ref);
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
/**
* Callback for remove_child event.
*/
void SPFont::remove_child(Inkscape::XML::Node* child) {
SPObject::remove_child(child);
this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
void SPFont::release() {
this->document->removeResource("font", this);
SPObject::release();
}
void SPFont::set(SPAttributeEnum key, const gchar *value) {
// TODO these are floating point, so some epsilon comparison would be good
switch (key) {
case SP_ATTR_HORIZ_ORIGIN_X:
{
double number = value ? g_ascii_strtod(value, nullptr) : 0;
if (number != this->horiz_origin_x){
this->horiz_origin_x = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
case SP_ATTR_HORIZ_ORIGIN_Y:
{
double number = value ? g_ascii_strtod(value, nullptr) : 0;
if (number != this->horiz_origin_y){
this->horiz_origin_y = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
case SP_ATTR_HORIZ_ADV_X:
{
double number = value ? g_ascii_strtod(value, nullptr) : FNT_DEFAULT_ADV;
if (number != this->horiz_adv_x){
this->horiz_adv_x = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
case SP_ATTR_VERT_ORIGIN_X:
{
double number = value ? g_ascii_strtod(value, nullptr) : FNT_DEFAULT_ADV / 2.0;
if (number != this->vert_origin_x){
this->vert_origin_x = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
case SP_ATTR_VERT_ORIGIN_Y:
{
double number = value ? g_ascii_strtod(value, nullptr) : FNT_DEFAULT_ASCENT;
if (number != this->vert_origin_y){
this->vert_origin_y = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
case SP_ATTR_VERT_ADV_Y:
{
double number = value ? g_ascii_strtod(value, nullptr) : FNT_UNITS_PER_EM;
if (number != this->vert_adv_y){
this->vert_adv_y = number;
this->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
break;
}
default:
SPObject::set(key, value);
break;
}
}
/**
* Receives update notifications.
*/
void SPFont::update(SPCtx *ctx, guint flags) {
if (flags & (SP_OBJECT_MODIFIED_FLAG)) {
this->readAttr( "horiz-origin-x" );
this->readAttr( "horiz-origin-y" );
this->readAttr( "horiz-adv-x" );
this->readAttr( "vert-origin-x" );
this->readAttr( "vert-origin-y" );
this->readAttr( "vert-adv-y" );
}
SPObject::update(ctx, flags);
}
#define COPY_ATTR(rd,rs,key) (rd)->setAttribute((key), rs->attribute(key));
Inkscape::XML::Node* SPFont::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("svg:font");
}
sp_repr_set_svg_double(repr, "horiz-origin-x", this->horiz_origin_x);
sp_repr_set_svg_double(repr, "horiz-origin-y", this->horiz_origin_y);
sp_repr_set_svg_double(repr, "horiz-adv-x", this->horiz_adv_x);
sp_repr_set_svg_double(repr, "vert-origin-x", this->vert_origin_x);
sp_repr_set_svg_double(repr, "vert-origin-y", this->vert_origin_y);
sp_repr_set_svg_double(repr, "vert-adv-y", this->vert_adv_y);
if (repr != this->getRepr()) {
// All the below COPY_ATTR functions are directly using
// the XML Tree while they shouldn't
COPY_ATTR(repr, this->getRepr(), "horiz-origin-x");
COPY_ATTR(repr, this->getRepr(), "horiz-origin-y");
COPY_ATTR(repr, this->getRepr(), "horiz-adv-x");
COPY_ATTR(repr, this->getRepr(), "vert-origin-x");
COPY_ATTR(repr, this->getRepr(), "vert-origin-y");
COPY_ATTR(repr, this->getRepr(), "vert-adv-y");
}
SPObject::write(xml_doc, repr, flags);
return repr;
}
/*
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 :
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