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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#pragma once
#include "FN_multi_function.hh"
#include "DNA_node_types.h"
#include "NOD_derived_node_tree.hh"
namespace blender::nodes {
using namespace fn::multi_function_types;
class NodeMultiFunctions;
/**
* Utility class to help nodes build a multi-function for themselves.
*/
class NodeMultiFunctionBuilder : NonCopyable, NonMovable {
private:
ResourceScope &resource_scope_;
bNode &node_;
bNodeTree &tree_;
const MultiFunction *built_fn_ = nullptr;
friend NodeMultiFunctions;
public:
NodeMultiFunctionBuilder(ResourceScope &resource_scope, bNode &node, bNodeTree &tree);
/**
* Assign a multi-function for the current node. The input and output parameters of the function
* have to match the available sockets in the node.
*/
void set_matching_fn(const MultiFunction *fn);
void set_matching_fn(const MultiFunction &fn);
/**
* Utility method for creating and assigning a multi-function when it can't have a static
* lifetime.
*/
template<typename T, typename... Args> void construct_and_set_matching_fn(Args &&...args);
bNode &node();
bNodeTree &tree();
ResourceScope &resource_scope();
};
/**
* Gives access to multi-functions for all nodes in a node tree that support them.
*/
class NodeMultiFunctions {
private:
Map<const bNode *, const MultiFunction *> map_;
public:
NodeMultiFunctions(const DerivedNodeTree &tree, ResourceScope &resource_scope);
const MultiFunction *try_get(const DNode &node) const;
};
/* --------------------------------------------------------------------
* NodeMultiFunctionBuilder inline methods.
*/
inline NodeMultiFunctionBuilder::NodeMultiFunctionBuilder(ResourceScope &resource_scope,
bNode &node,
bNodeTree &tree)
: resource_scope_(resource_scope), node_(node), tree_(tree)
{
}
inline bNode &NodeMultiFunctionBuilder::node()
{
return node_;
}
inline bNodeTree &NodeMultiFunctionBuilder::tree()
{
return tree_;
}
inline ResourceScope &NodeMultiFunctionBuilder::resource_scope()
{
return resource_scope_;
}
inline void NodeMultiFunctionBuilder::set_matching_fn(const MultiFunction *fn)
{
built_fn_ = fn;
}
inline void NodeMultiFunctionBuilder::set_matching_fn(const MultiFunction &fn)
{
this->set_matching_fn(&fn);
}
template<typename T, typename... Args>
inline void NodeMultiFunctionBuilder::construct_and_set_matching_fn(Args &&...args)
{
const T &fn = resource_scope_.construct<T>(__func__, std::forward<Args>(args)...);
this->set_matching_fn(&fn);
}
/* --------------------------------------------------------------------
* NodeMultiFunctions inline methods.
*/
inline const MultiFunction *NodeMultiFunctions::try_get(const DNode &node) const
{
return map_.lookup_default(node->bnode(), nullptr);
}
} // namespace blender::nodes
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