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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Inkscape::ShapeEditor
* This is a container class which contains a knotholder for shapes.
* It is attached to a single item.
*//*
* Authors: see git history
* bulia byak <buliabyak@users.sf.net>
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright (C) 2018 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "shape-editor.h"
#include "desktop.h"
#include "document.h"
#include "live_effects/effect.h"
#include "object/sp-lpe-item.h"
#include "ui/knot/knot-holder.h"
namespace Inkscape {
namespace UI {
KnotHolder *createKnotHolder(SPItem *item, SPDesktop *desktop, double edit_rotation, int edit_marker_mode);
KnotHolder *createLPEKnotHolder(SPItem *item, SPDesktop *desktop);
bool ShapeEditor::_blockSetItem = false;
ShapeEditor::ShapeEditor(SPDesktop *dt, Geom::Affine edit_transform, double edit_rotation, int edit_marker_mode)
: desktop(dt)
, _edit_transform(edit_transform)
, _edit_rotation(edit_rotation)
, _edit_marker_mode(edit_marker_mode)
{
}
ShapeEditor::~ShapeEditor() {
unset_item();
}
void ShapeEditor::unset_item(bool keep_knotholder) {
if (this->knotholder) {
Inkscape::XML::Node *old_repr = this->knotholder->repr;
if (old_repr && old_repr == knotholder_listener_attached_for) {
old_repr->removeObserver(*this);
Inkscape::GC::release(old_repr);
knotholder_listener_attached_for = nullptr;
}
if (!keep_knotholder) {
delete this->knotholder;
this->knotholder = nullptr;
}
}
if (this->lpeknotholder) {
Inkscape::XML::Node *old_repr = this->lpeknotholder->repr;
bool remove = false;
if (old_repr && old_repr == lpeknotholder_listener_attached_for) {
old_repr->removeObserver(*this);
Inkscape::GC::release(old_repr);
remove = true;
}
if (!keep_knotholder) {
delete this->lpeknotholder;
this->lpeknotholder = nullptr;
}
if (remove) {
lpeknotholder_listener_attached_for = nullptr;
}
}
}
bool ShapeEditor::has_knotholder() {
return this->knotholder != nullptr || this->lpeknotholder != nullptr;
}
void ShapeEditor::update_knotholder() {
if (this->knotholder)
this->knotholder->update_knots();
if (this->lpeknotholder)
this->lpeknotholder->update_knots();
}
bool ShapeEditor::has_local_change() {
return (this->knotholder && this->knotholder->local_change != 0) || (this->lpeknotholder && this->lpeknotholder->local_change != 0);
}
void ShapeEditor::decrement_local_change() {
if (this->knotholder) {
this->knotholder->local_change = FALSE;
}
if (this->lpeknotholder) {
this->lpeknotholder->local_change = FALSE;
}
}
void ShapeEditor::notifyAttributeChanged(Inkscape::XML::Node&, GQuark,
Inkscape::Util::ptr_shared,
Inkscape::Util::ptr_shared)
{
bool changed_kh = false;
if (has_knotholder()) {
changed_kh = !has_local_change();
decrement_local_change();
if (changed_kh) {
reset_item();
}
}
}
void ShapeEditor::set_item(SPItem *item) {
if (_blockSetItem) {
return;
}
// this happens (and should only happen) when for an LPEItem having both knotholder and
// nodepath the knotholder is adapted; in this case we don't want to delete the knotholder
// since this freezes the handles
unset_item(true);
if (item) {
Inkscape::XML::Node *repr;
if (!this->knotholder) {
// only recreate knotholder if none is present
this->knotholder = createKnotHolder(item, desktop, _edit_rotation, _edit_marker_mode);
}
auto lpe = cast<SPLPEItem>(item);
if (!(lpe &&
lpe->getCurrentLPE() &&
lpe->getCurrentLPE()->isVisible() &&
lpe->getCurrentLPE()->providesKnotholder()))
{
delete this->lpeknotholder;
this->lpeknotholder = nullptr;
}
if (!this->lpeknotholder) {
// only recreate knotholder if none is present
this->lpeknotholder = createLPEKnotHolder(item, desktop);
}
if (this->knotholder) {
knotholder->install_modification_watch(); // let knotholder know item's attribute may have changed
this->knotholder->setEditTransform(_edit_transform);
this->knotholder->update_knots();
// setting new listener
repr = this->knotholder->repr;
if (repr != knotholder_listener_attached_for) {
Inkscape::GC::anchor(repr);
repr->addObserver(*this);
knotholder_listener_attached_for = repr;
}
}
if (this->lpeknotholder) {
this->lpeknotholder->setEditTransform(_edit_transform);
this->lpeknotholder->update_knots();
// setting new listener
repr = this->lpeknotholder->repr;
if (repr != lpeknotholder_listener_attached_for) {
Inkscape::GC::anchor(repr);
repr->addObserver(*this);
lpeknotholder_listener_attached_for = repr;
}
}
}
}
/** FIXME: This thing is only called when the item needs to be updated in response to repr change.
Why not make a reload function in KnotHolder? */
void ShapeEditor::reset_item()
{
if (knotholder) {
SPObject *obj = desktop->getDocument()->getObjectByRepr(knotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
set_item(cast<SPItem>(obj));
} else if (lpeknotholder) {
SPObject *obj = desktop->getDocument()->getObjectByRepr(lpeknotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
set_item(cast<SPItem>(obj));
}
}
/**
* Returns true if this ShapeEditor has a knot above which the mouse currently hovers.
*/
bool ShapeEditor::knot_mouseover() const {
if (this->knotholder) {
return knotholder->knot_mouseover();
}
if (this->lpeknotholder) {
return lpeknotholder->knot_mouseover();
}
return false;
}
} // namespace UI
} // 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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