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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SVG <line> implementation
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Abhishek Sharma
* Jon A. Cruz <jon@joncruz.org>
*
* Copyright (C) 1999-2002 Lauris Kaplinski
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "attributes.h"
#include "style.h"
#include "sp-line.h"
#include "sp-guide.h"
#include "display/curve.h"
#include <glibmm/i18n.h>
#include "document.h"
#include "inkscape.h"
SPLine::SPLine() : SPShape() {
this->x1.unset();
this->y1.unset();
this->x2.unset();
this->y2.unset();
}
SPLine::~SPLine() = default;
void SPLine::build(SPDocument * document, Inkscape::XML::Node * repr) {
SPShape::build(document, repr);
this->readAttr(SPAttr::X1);
this->readAttr(SPAttr::Y1);
this->readAttr(SPAttr::X2);
this->readAttr(SPAttr::Y2);
}
void SPLine::set(SPAttr key, const gchar* value) {
/* fixme: we should really collect updates */
switch (key) {
case SPAttr::X1:
this->x1.readOrUnset(value);
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
case SPAttr::Y1:
this->y1.readOrUnset(value);
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
case SPAttr::X2:
this->x2.readOrUnset(value);
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
case SPAttr::Y2:
this->y2.readOrUnset(value);
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
break;
default:
SPShape::set(key, value);
break;
}
}
void SPLine::update(SPCtx *ctx, guint flags) {
if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
SPStyle const *style = this->style;
SPItemCtx const *ictx = (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 = em * 0.5; // fixme: get from pango or libnrtype.
this->x1.update(em, ex, w);
this->x2.update(em, ex, w);
this->y1.update(em, ex, h);
this->y2.update(em, ex, h);
this->set_shape();
}
SPShape::update(ctx, flags);
}
Inkscape::XML::Node* SPLine::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("svg:line");
}
if (repr != this->getRepr()) {
repr->mergeFrom(this->getRepr(), "id");
}
repr->setAttributeSvgDouble("x1", this->x1.computed);
repr->setAttributeSvgDouble("y1", this->y1.computed);
repr->setAttributeSvgDouble("x2", this->x2.computed);
repr->setAttributeSvgDouble("y2", this->y2.computed);
SPShape::write(xml_doc, repr, flags);
return repr;
}
const char* SPLine::typeName() const {
return "path";
}
const char* SPLine::displayName() const {
return _("Line");
}
void SPLine::convert_to_guides() const {
Geom::Point points[2];
Geom::Affine const i2dt(this->i2dt_affine());
points[0] = Geom::Point(this->x1.computed, this->y1.computed)*i2dt;
points[1] = Geom::Point(this->x2.computed, this->y2.computed)*i2dt;
SPGuide::createSPGuide(this->document, points[0], points[1]);
}
Geom::Affine SPLine::set_transform(Geom::Affine const &transform) {
Geom::Point points[2];
points[0] = Geom::Point(this->x1.computed, this->y1.computed);
points[1] = Geom::Point(this->x2.computed, this->y2.computed);
points[0] *= transform;
points[1] *= transform;
this->x1.computed = points[0][Geom::X];
this->y1.computed = points[0][Geom::Y];
this->x2.computed = points[1][Geom::X];
this->y2.computed = points[1][Geom::Y];
this->adjust_stroke(transform.descrim());
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
return Geom::identity();
}
void SPLine::set_shape() {
auto c = std::make_unique<SPCurve>();
c->moveto(this->x1.computed, this->y1.computed);
c->lineto(this->x2.computed, this->y2.computed);
// *_insync does not call update, avoiding infinite recursion when set_shape is called by update
setCurveInsync(std::move(c));
setCurveBeforeLPE(curve());
// LPE's cannot be applied to lines. (the result can (generally) not be represented as SPLine)
}
/*
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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