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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SVG <inkscape:tagref> implementation
*
* Authors:
* Theodore Janeczko
* Liam P White
*
* Copyright (C) Theodore Janeczko 2012-2014 <flutterguy317@gmail.com>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "sp-tag-use.h"
#include <cstring>
#include <string>
#include <glibmm/i18n.h>
#include "bad-uri-exception.h"
#include "display/drawing-group.h"
#include "attributes.h"
#include "document.h"
#include "uri.h"
#include "xml/repr.h"
#include "preferences.h"
#include "style.h"
#include "sp-factory.h"
#include "sp-symbol.h"
#include "sp-tag-use-reference.h"
SPTagUse::SPTagUse()
{
href = nullptr;
//new (_changed_connection) sigc::connection;
ref = new SPTagUseReference(this);
_changed_connection = ref->changedSignal().connect(sigc::mem_fun(*this, &SPTagUse::href_changed));
}
SPTagUse::~SPTagUse()
{
ref->detach();
delete ref;
ref = nullptr;
}
void
SPTagUse::build(SPDocument *document, Inkscape::XML::Node *repr)
{
SPObject::build(document, repr);
readAttr( "xlink:href" );
// We don't need to create child here:
// reading xlink:href will attach ref, and that will cause the changed signal to be emitted,
// which will call sp_tag_use_href_changed, and that will take care of the child
}
void
SPTagUse::release()
{
_changed_connection.disconnect();
g_free(href);
href = nullptr;
ref->detach();
SPObject::release();
}
void
SPTagUse::set(SPAttributeEnum key, gchar const *value)
{
switch (key) {
case SP_ATTR_XLINK_HREF: {
if ( value && href && ( strcmp(value, href) == 0 ) ) {
/* No change, do nothing. */
} else {
g_free(href);
href = nullptr;
if (value) {
// First, set the href field, because sp_tag_use_href_changed will need it.
href = g_strdup(value);
// Now do the attaching, which emits the changed signal.
try {
ref->attach(Inkscape::URI(value));
} catch (Inkscape::BadURIException &e) {
g_warning("%s", e.what());
ref->detach();
}
} else {
ref->detach();
}
}
break;
}
default:
SPObject::set(key, value);
break;
}
}
Inkscape::XML::Node *
SPTagUse::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
{
if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
repr = xml_doc->createElement("inkscape:tagref");
}
SPObject::write(xml_doc, repr, flags);
return repr;
}
void
SPTagUse::href_changed(SPObject *old_ref, SPObject *new_ref)
{
if (old_ref && getRepr()) {
auto const id = old_ref->getAttribute("id");
if (id) {
getRepr()->setAttribute("xlink:href", Glib::ustring("#") + id);
}
}
}
SPItem * SPTagUse::get_original()
{
SPItem *ref_ = nullptr;
if (ref) {
ref_ = ref->getObject();
}
return ref_;
}
/*
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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