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-rw-r--r--src/live_effects/lpeobject-reference.cpp158
1 files changed, 158 insertions, 0 deletions
diff --git a/src/live_effects/lpeobject-reference.cpp b/src/live_effects/lpeobject-reference.cpp
new file mode 100644
index 0000000..3f1eadf
--- /dev/null
+++ b/src/live_effects/lpeobject-reference.cpp
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * The reference corresponding to the inkscape:live-effect attribute
+ *
+ * Copyright (C) 2007 Johan Engelen
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "live_effects/lpeobject-reference.h"
+
+#include <cstring>
+
+#include "bad-uri-exception.h"
+#include "live_effects/lpeobject.h"
+#include "object/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 = nullptr;
+ lpeobject_repr = nullptr;
+ lpeobject = nullptr;
+ _changed_connection = changedSignal().connect(sigc::bind(sigc::ptr_fun(lpeobjectreference_href_changed), this)); // listening to myself, this should be virtual instead
+
+ user_unlink = nullptr;
+}
+
+LPEObjectReference::~LPEObjectReference()
+{
+ _changed_connection.disconnect(); // to do before unlinking
+
+ quit_listening();
+ unlink();
+}
+
+bool LPEObjectReference::_acceptObject(SPObject * const obj) const
+{
+ LivePathEffectObject *lpobj = dynamic_cast<LivePathEffectObject *>(obj);
+ if (lpobj) {
+ return URIReference::_acceptObject(obj);
+ } else {
+ return false;
+ }
+}
+
+void
+LPEObjectReference::link(const char *to)
+{
+ if ( to && !to[0] ) {
+ quit_listening();
+ unlink();
+ } else {
+ if ( !lpeobject_href || ( strcmp(to, lpeobject_href) != 0 ) ) {
+ if (lpeobject_href) {
+ 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()
+{
+ if (lpeobject_href) {
+ g_free(lpeobject_href);
+ lpeobject_href = nullptr;
+ }
+ detach();
+}
+
+void
+LPEObjectReference::start_listening(LivePathEffectObject* to)
+{
+ if ( to == nullptr ) {
+ return;
+ }
+ lpeobject = to;
+ lpeobject_repr = to->getRepr();
+ _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()
+{
+ _modified_connection.disconnect();
+ _delete_connection.disconnect();
+ lpeobject_repr = nullptr;
+ lpeobject = nullptr;
+}
+
+static void
+lpeobjectreference_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, LPEObjectReference *lpeobjref)
+{
+ lpeobjref->quit_listening();
+ LivePathEffectObject *refobj = dynamic_cast<LivePathEffectObject *>( lpeobjref->getObject() );
+ if ( refobj ) {
+ lpeobjref->start_listening(refobj);
+ }
+ if (lpeobjref->owner) {
+ lpeobjref->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+ }
+}
+
+static void
+lpeobjectreference_delete_self(SPObject */*deleted*/, LPEObjectReference *lpeobjref)
+{
+ lpeobjref->quit_listening();
+ lpeobjref->unlink();
+ if (lpeobjref->user_unlink) {
+ lpeobjref->user_unlink(lpeobjref, lpeobjref->owner);
+ }
+}
+
+static void
+lpeobjectreference_source_modified(SPObject */*iSource*/, guint /*flags*/, LPEObjectReference *lpeobjref)
+{
+// We dont need to request update when LPE XML is updated
+// Retain it temporary, drop if no regression
+// SPObject *owner_obj = lpeobjref->owner;
+// if (owner_obj) {
+// 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 :