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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* The reference corresponding to href of <inkscape:tagref> element.
*
* 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-reference.h"
#include <cstring>
#include <string>
#include "bad-uri-exception.h"
#include "preferences.h"
#include "sp-shape.h"
#include "sp-text.h"
#include "uri.h"
bool SPTagUseReference::_acceptObject(SPObject * const obj) const
{
if (SP_IS_ITEM(obj)) {
return URIReference::_acceptObject(obj);
} else {
return false;
}
}
static void sp_usepath_href_changed(SPObject *old_ref, SPObject *ref, SPTagUsePath *offset);
static void sp_usepath_delete_self(SPObject *deleted, SPTagUsePath *offset);
SPTagUsePath::SPTagUsePath(SPObject* i_owner):SPTagUseReference(i_owner)
{
owner=i_owner;
sourceDirty=false;
sourceHref = nullptr;
sourceRepr = nullptr;
sourceObject = nullptr;
_changed_connection = changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_usepath_href_changed), this)); // listening to myself, this should be virtual instead
user_unlink = nullptr;
}
SPTagUsePath::~SPTagUsePath()
{
_changed_connection.disconnect(); // to do before unlinking
quit_listening();
unlink();
}
void
SPTagUsePath::link(char *to)
{
if ( to == nullptr ) {
quit_listening();
unlink();
} else {
if ( !sourceHref || ( strcmp(to, sourceHref) != 0 ) ) {
g_free(sourceHref);
sourceHref = g_strdup(to);
try {
attach(Inkscape::URI(to));
} catch (Inkscape::BadURIException &e) {
/* TODO: Proper error handling as per
* http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing.
*/
g_warning("%s", e.what());
detach();
}
}
}
}
void
SPTagUsePath::unlink()
{
g_free(sourceHref);
sourceHref = nullptr;
detach();
}
void
SPTagUsePath::start_listening(SPObject* to)
{
if ( to == nullptr ) {
return;
}
sourceObject = to;
sourceRepr = to->getRepr();
_delete_connection = to->connectDelete(sigc::bind(sigc::ptr_fun(&sp_usepath_delete_self), this));
}
void
SPTagUsePath::quit_listening()
{
if ( sourceObject == nullptr ) {
return;
}
_delete_connection.disconnect();
sourceRepr = nullptr;
sourceObject = nullptr;
}
static void
sp_usepath_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, SPTagUsePath *offset)
{
offset->quit_listening();
SPItem *refobj = offset->getObject();
if ( refobj ) {
offset->start_listening(refobj);
}
}
static void
sp_usepath_delete_self(SPObject */*deleted*/, SPTagUsePath *offset)
{
offset->owner->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 :
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