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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Reference class for shapes (SVG 2 text).
*
* Copyright (C) 2020 Authors
*/
#include "sp-shape-reference.h"
#include "object/sp-text.h"
SPShapeReference::SPShapeReference(SPObject *obj)
: URIReference(obj)
{
// The text object can be detached from the document but still be
// referenced, and its style (who's the owner of the SPShapeReference)
// can also still be referenced even after the object got destroyed.
_owner_release_connection = obj->connectRelease([this](SPObject *text_object) {
assert(text_object == this->getOwner());
// Fully detach to prevent reconnecting with a shape's modified signal
this->detach();
this->_owner_release_connection.disconnect();
});
// https://www.w3.org/TR/SVG/text.html#TextShapeInside
// Applies to: 'text' elements
// Inherited: no
if (!dynamic_cast<SPText *>(obj)) {
g_warning("shape reference on non-text object: %s", typeid(*obj).name());
return;
}
// Listen to the shape's modified event to keep the text layout updated
changedSignal().connect([this](SPObject *, SPObject *shape_object) {
this->_shape_modified_connection.disconnect();
if (shape_object) {
this->_shape_modified_connection =
shape_object->connectModified(sigc::mem_fun(*this, &SPShapeReference::on_shape_modified));
}
});
}
SPShapeReference::~SPShapeReference()
{ //
_shape_modified_connection.disconnect();
_owner_release_connection.disconnect();
}
/**
* Slot to connect to the shape's modified signal. Requests display update of the text object.
*/
void SPShapeReference::on_shape_modified(SPObject *shape_object, unsigned flags)
{
auto *text_object = getOwner();
assert(text_object);
assert(shape_object == getObject());
if ((flags & SP_OBJECT_MODIFIED_FLAG)) {
text_object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_TEXT_LAYOUT_MODIFIED_FLAG);
}
}
// vim: filetype=cpp:expandtab:shiftwidth=4:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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