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Diffstat (limited to 'src/live_effects/lpeobject-reference.cpp')
| -rw-r--r-- | src/live_effects/lpeobject-reference.cpp | 160 |
1 files changed, 160 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..700b8f5 --- /dev/null +++ b/src/live_effects/lpeobject-reference.cpp @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * The reference corresponding to the inkscape:live-effect attribute + * + * Copyright (C) 2007 Johan Engelen + * + * Release under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "live_effects/lpeobject-reference.h" +#include "live_effects/effect.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_release_self(SPObject *release, 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(); + _release_connection = to->connectRelease(sigc::bind(sigc::ptr_fun(&lpeobjectreference_release_self), this)); + _modified_connection = to->connectModified(sigc::bind<2>(sigc::ptr_fun(&lpeobjectreference_source_modified), this)); +} + +void +LPEObjectReference::quit_listening() +{ + _modified_connection.disconnect(); + _release_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_release_self(SPObject */*release*/, 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 : |