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/*
* The reference corresponding to the inkscape:live-effect attribute
*
* Copyright (C) 2007 Johan Engelen
*
* Released under GNU GPL, read the file 'COPYING' for more information.
*/
#include "enums.h"
#include "live_effects/lpeobject-reference.h"
#include "live_effects/lpeobject.h"
#include "prefs-utils.h"
#include "uri.h"
namespace Inkscape {
namespace LivePathEffect {
static void lpeobjectreference_href_changed(SPObject *old_ref, SPObject *ref, LPEObjectReference *lpeobjref);
static void lpeobjectreference_delete_self(SPObject *deleted, LPEObjectReference *lpeobjref);
static void lpeobjectreference_source_modified(SPObject *iSource, guint flags, LPEObjectReference *lpeobjref);
LPEObjectReference::LPEObjectReference(SPObject* i_owner) : URIReference(i_owner)
{
owner=i_owner;
lpeobject_href = NULL;
lpeobject_repr = NULL;
lpeobject = NULL;
_changed_connection = changedSignal().connect(sigc::bind(sigc::ptr_fun(lpeobjectreference_href_changed), this)); // listening to myself, this should be virtual instead
user_unlink = NULL;
}
LPEObjectReference::~LPEObjectReference(void)
{
_changed_connection.disconnect(); // to do before unlinking
quit_listening();
unlink();
}
bool LPEObjectReference::_acceptObject(SPObject * const obj) const
{
if (IS_LIVEPATHEFFECT(obj)) {
SPObject * const owner = getOwner();
/* Refuse references to us or to an ancestor. */
for ( SPObject *iter = owner ; iter ; iter = SP_OBJECT_PARENT(iter) ) {
if ( iter == obj ) {
return false;
}
}
return true;
} else {
return false;
}
}
void
LPEObjectReference::link(char *to)
{
if ( to == NULL ) {
quit_listening();
unlink();
} else {
if ( !lpeobject_href || ( strcmp(to, lpeobject_href) != 0 ) ) {
g_free(lpeobject_href);
lpeobject_href = 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
LPEObjectReference::unlink(void)
{
g_free(lpeobject_href);
lpeobject_href = NULL;
detach();
}
void
LPEObjectReference::start_listening(LivePathEffectObject* to)
{
if ( to == NULL ) {
return;
}
lpeobject = to;
lpeobject_repr = SP_OBJECT_REPR(to);
_delete_connection = to->connectDelete(sigc::bind(sigc::ptr_fun(&lpeobjectreference_delete_self), this));
_modified_connection = to->connectModified(sigc::bind<2>(sigc::ptr_fun(&lpeobjectreference_source_modified), this));
}
void
LPEObjectReference::quit_listening(void)
{
if ( lpeobject == NULL ) {
return;
}
_modified_connection.disconnect();
_delete_connection.disconnect();
lpeobject_repr = NULL;
lpeobject = NULL;
}
static void
lpeobjectreference_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, LPEObjectReference *lpeobjref)
{
lpeobjref->quit_listening();
LivePathEffectObject *refobj = LIVEPATHEFFECT( lpeobjref->getObject() );
if ( refobj ) {
lpeobjref->start_listening(refobj);
}
lpeobjref->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
static void
lpeobjectreference_delete_self(SPObject */*deleted*/, LPEObjectReference *lpeobjref)
{
guint const mode = prefs_get_int_attribute("options.cloneorphans", "value", SP_CLONE_ORPHANS_UNLINK);
if (mode == SP_CLONE_ORPHANS_UNLINK) {
// leave it be. just forget about the source
lpeobjref->quit_listening();
lpeobjref->unlink();
if (lpeobjref->user_unlink)
lpeobjref->user_unlink(lpeobjref->owner);
} else if (mode == SP_CLONE_ORPHANS_DELETE) {
lpeobjref->owner->deleteObject();
}
}
static void
lpeobjectreference_source_modified(SPObject */*iSource*/, guint /*flags*/, LPEObjectReference *lpeobjref)
{
lpeobjref->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
} //namespace LivePathEffect
} // namespace inkscape
/*
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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