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// Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "entityvisitor_p.h"
#include <Qt3DRender/private/managers_p.h>
#include <Qt3DRender/private/nodemanagers_p.h>
QT_USE_NAMESPACE
using namespace Qt3DRender::Render;
EntityVisitor::EntityVisitor(NodeManagers *manager)
: m_manager(manager)
, m_pruneDisabled(false)
{
}
EntityVisitor::~EntityVisitor() = default;
/*!
* \internal
*
* Override in derived class to do work on the current entity
*
* Return value (Continue, Prune, Stop) will affect traversal
*/
EntityVisitor::Operation EntityVisitor::visit(Entity *entity) {
// return false to stop traversal
if (!entity)
return Stop;
return Continue;
}
/*!
* \internal
*
* If true, disabled entities and all their children will be ignored
* during traversal
*
*/
bool EntityVisitor::pruneDisabled() const
{
return m_pruneDisabled;
}
void EntityVisitor::setPruneDisabled(bool pruneDisabled)
{
m_pruneDisabled = pruneDisabled;
}
/*!
* \internal
*
* Call on the root of the tree that should be traversed.
* Returns false if any visit resulted in Stop
*/
bool EntityVisitor::apply(Entity *root) {
if (!root)
return false;
if (m_pruneDisabled && !root->isEnabled())
return true;
const auto op = visit(root);
if (op == Stop)
return false;
if (op == Prune)
return true;
const auto &childrenHandles = root->childrenHandles();
for (const HEntity &handle : childrenHandles) {
Entity *child = m_manager->renderNodesManager()->data(handle);
if (child != nullptr && !apply(child))
return false;
}
return true;
}
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