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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /src/xml/helper-observer.cpp | |
parent | Initial commit. (diff) | |
download | inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/xml/helper-observer.cpp | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/xml/helper-observer.cpp b/src/xml/helper-observer.cpp new file mode 100644 index 0000000..05161e9 --- /dev/null +++ b/src/xml/helper-observer.cpp @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * TODO: insert short description here + *//* + * Authors: see git history + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include "helper-observer.h" + +#include "object/sp-object.h" + +namespace Inkscape { +namespace XML { + +// Very simple observer that just emits a signal if anything happens to a node +SignalObserver::SignalObserver() + : _oldsel(nullptr) +{} + +SignalObserver::~SignalObserver() +{ + set(nullptr); // if _oldsel!=nullptr, remove observer and decrease refcount +} + +// Add this observer to the SPObject and remove it from any previous object +void SignalObserver::set(SPObject* o) +{ + // XML Tree being used directly in this function in the following code + // while it shouldn't be + // Pointer to object is stored, so refcounting should be increased/decreased + if(_oldsel) { + if (_oldsel->getRepr()) { + _oldsel->getRepr()->removeObserver(*this); + } + sp_object_unref(_oldsel); + _oldsel = nullptr; + } + if(o) { + if (o->getRepr()) { + o->getRepr()->addObserver(*this); + sp_object_ref(o); + _oldsel = o; + } + } +} + +void SignalObserver::notifyChildAdded(XML::Node&, XML::Node&, XML::Node*) +{ signal_changed()(); } + +void SignalObserver::notifyChildRemoved(XML::Node&, XML::Node&, XML::Node*) +{ signal_changed()(); } + +void SignalObserver::notifyChildOrderChanged(XML::Node&, XML::Node&, XML::Node*, XML::Node*) +{ signal_changed()(); } + +void SignalObserver::notifyContentChanged(XML::Node&, Util::ptr_shared, Util::ptr_shared) +{} + +void SignalObserver::notifyAttributeChanged(XML::Node&, GQuark, Util::ptr_shared, Util::ptr_shared) +{ signal_changed()(); } + +void SignalObserver::notifyElementNameChanged(Node&, GQuark, GQuark) +{ + signal_changed()(); +} + +sigc::signal<void>& SignalObserver::signal_changed() +{ + return _signal_changed; +} + +} //namespace XML +} //namespace Inkscape + |