NOD_node_tree_ref.hh

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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 "BLI_array.hh"
#include "BLI_function_ref.hh"
#include "BLI_linear_allocator.hh"
#include "BLI_map.hh"
#include "BLI_multi_value_map.hh"
#include "BLI_string_ref.hh"
#include "BLI_timeit.hh"
#include "BLI_utility_mixins.hh"
#include "BLI_vector.hh"
 
#include "BKE_node.h"
 
#include "DNA_node_types.h"
 
#include "RNA_access.h"
 
namespace blender::nodes {
 
class SocketRef;
class InputSocketRef;
class OutputSocketRef;
class NodeRef;
class NodeTreeRef;
class LinkRef;
class InternalLinkRef;
 
class SocketRef : NonCopyable, NonMovable {
 protected:
  NodeRef *node_;
  bNodeSocket *bsocket_;
  bool is_input_;
  int id_;
  int index_;
  PointerRNA rna_;
  Vector<LinkRef *> directly_linked_links_;
 
  /* These sockets are linked directly, i.e. with a single link in between. */
  MutableSpan<const SocketRef *> directly_linked_sockets_;
  /* These sockets are linked when reroutes, muted links and muted nodes have been taken into
   * account. */
  MutableSpan<const SocketRef *> logically_linked_sockets_;
  /* These are the sockets that have been skipped when searching for logically linked sockets.
   * That includes for example the input and output socket of an intermediate reroute node. */
  MutableSpan<const SocketRef *> logically_linked_skipped_sockets_;
 
  friend NodeTreeRef;
 
 public:
  Span<const SocketRef *> logically_linked_sockets() const;
  Span<const SocketRef *> logically_linked_skipped_sockets() const;
  Span<const SocketRef *> directly_linked_sockets() const;
  Span<const LinkRef *> directly_linked_links() const;
 
  bool is_directly_linked() const;
  bool is_logically_linked() const;
 
  const NodeRef &node() const;
  const NodeTreeRef &tree() const;
 
  int id() const;
  int index() const;
 
  bool is_input() const;
  bool is_output() const;
 
  const SocketRef &as_base() const;
  const InputSocketRef &as_input() const;
  const OutputSocketRef &as_output() const;
 
  PointerRNA *rna() const;
 
  StringRefNull idname() const;
  StringRefNull name() const;
  StringRefNull identifier() const;
  bNodeSocketType *typeinfo() const;
 
  bNodeSocket *bsocket() const;
  bNode *bnode() const;
  bNodeTree *btree() const;
 
  bool is_available() const;
  bool is_undefined() const;
 
  void *default_value() const;
  template<typename T> T *default_value() const;
};
 
class InputSocketRef final : public SocketRef {
 public:
  friend NodeTreeRef;
 
  Span<const OutputSocketRef *> logically_linked_sockets() const;
  Span<const OutputSocketRef *> directly_linked_sockets() const;
 
  bool is_multi_input_socket() const;
 
 private:
  void foreach_logical_origin(FunctionRef<void(const OutputSocketRef &)> origin_fn,
                              FunctionRef<void(const SocketRef &)> skipped_fn,
                              bool only_follow_first_input_link,
                              Vector<const InputSocketRef *> &handled_sockets) const;
};
 
class OutputSocketRef final : public SocketRef {
 public:
  friend NodeTreeRef;
 
  Span<const InputSocketRef *> logically_linked_sockets() const;
  Span<const InputSocketRef *> directly_linked_sockets() const;
 
 private:
  void foreach_logical_target(FunctionRef<void(const InputSocketRef &)> target_fn,
                              FunctionRef<void(const SocketRef &)> skipped_fn,
                              Vector<const OutputSocketRef *> &handled_sockets) const;
};
 
class NodeRef : NonCopyable, NonMovable {
 private:
  NodeTreeRef *tree_;
  bNode *bnode_;
  PointerRNA rna_;
  int id_;
  Vector<InputSocketRef *> inputs_;
  Vector<OutputSocketRef *> outputs_;
  Vector<InternalLinkRef *> internal_links_;
 
  friend NodeTreeRef;
 
 public:
  const NodeTreeRef &tree() const;
 
  Span<const InputSocketRef *> inputs() const;
  Span<const OutputSocketRef *> outputs() const;
  Span<const InternalLinkRef *> internal_links() const;
 
  const InputSocketRef &input(int index) const;
  const OutputSocketRef &output(int index) const;
 
  bNode *bnode() const;
  bNodeTree *btree() const;
 
  PointerRNA *rna() const;
  StringRefNull idname() const;
  StringRefNull name() const;
  bNodeType *typeinfo() const;
 
  int id() const;
 
  bool is_reroute_node() const;
  bool is_group_node() const;
  bool is_group_input_node() const;
  bool is_group_output_node() const;
  bool is_muted() const;
  bool is_frame() const;
  bool is_undefined() const;
 
  void *storage() const;
  template<typename T> T *storage() const;
};
 
class LinkRef : NonCopyable, NonMovable {
 private:
  OutputSocketRef *from_;
  InputSocketRef *to_;
  bNodeLink *blink_;
 
  friend NodeTreeRef;
 
 public:
  const OutputSocketRef &from() const;
  const InputSocketRef &to() const;
 
  bNodeLink *blink() const;
 
  bool is_muted() const;
};
 
class InternalLinkRef : NonCopyable, NonMovable {
 private:
  InputSocketRef *from_;
  OutputSocketRef *to_;
  bNodeLink *blink_;
 
  friend NodeTreeRef;
 
 public:
  const InputSocketRef &from() const;
  const OutputSocketRef &to() const;
 
  bNodeLink *blink() const;
};
 
class NodeTreeRef : NonCopyable, NonMovable {
 private:
  LinearAllocator<> allocator_;
  bNodeTree *btree_;
  Vector<NodeRef *> nodes_by_id_;
  Vector<SocketRef *> sockets_by_id_;
  Vector<InputSocketRef *> input_sockets_;
  Vector<OutputSocketRef *> output_sockets_;
  Vector<LinkRef *> links_;
  MultiValueMap<const bNodeType *, NodeRef *> nodes_by_type_;
 
 public:
  NodeTreeRef(bNodeTree *btree);
  ~NodeTreeRef();
 
  Span<const NodeRef *> nodes() const;
  Span<const NodeRef *> nodes_by_type(StringRefNull idname) const;
  Span<const NodeRef *> nodes_by_type(const bNodeType *nodetype) const;
 
  Span<const SocketRef *> sockets() const;
  Span<const InputSocketRef *> input_sockets() const;
  Span<const OutputSocketRef *> output_sockets() const;
 
  Span<const LinkRef *> links() const;
 
  bool has_link_cycles() const;
  bool has_undefined_nodes_or_sockets() const;
 
  bNodeTree *btree() const;
  StringRefNull name() const;
 
  std::string to_dot() const;
 
 private:
  /* Utility functions used during construction. */
  InputSocketRef &find_input_socket(Map<bNode *, NodeRef *> &node_mapping,
                                    bNode *bnode,
                                    bNodeSocket *bsocket);
  OutputSocketRef &find_output_socket(Map<bNode *, NodeRef *> &node_mapping,
                                      bNode *bnode,
                                      bNodeSocket *bsocket);
 
  void create_linked_socket_caches();
};
 
using NodeTreeRefMap = Map<bNodeTree *, std::unique_ptr<const NodeTreeRef>>;
 
const NodeTreeRef &get_tree_ref_from_map(NodeTreeRefMap &node_tree_refs, bNodeTree &btree);
 
namespace node_tree_ref_types {
using nodes::InputSocketRef;
using nodes::NodeRef;
using nodes::NodeTreeRef;
using nodes::NodeTreeRefMap;
using nodes::OutputSocketRef;
using nodes::SocketRef;
}  // namespace node_tree_ref_types
 
/* --------------------------------------------------------------------
 * SocketRef inline methods.
 */
 
inline Span<const SocketRef *> SocketRef::logically_linked_sockets() const
{
  return logically_linked_sockets_;
}
 
inline Span<const SocketRef *> SocketRef::logically_linked_skipped_sockets() const
{
  return logically_linked_skipped_sockets_;
}
 
inline Span<const SocketRef *> SocketRef::directly_linked_sockets() const
{
  return directly_linked_sockets_;
}
 
inline Span<const LinkRef *> SocketRef::directly_linked_links() const
{
  return directly_linked_links_;
}
 
inline bool SocketRef::is_directly_linked() const
{
  return directly_linked_sockets_.size() > 0;
}
 
inline bool SocketRef::is_logically_linked() const
{
  return logically_linked_sockets_.size() > 0;
}
 
inline const NodeRef &SocketRef::node() const
{
  return *node_;
}
 
inline const NodeTreeRef &SocketRef::tree() const
{
  return node_->tree();
}
 
inline int SocketRef::id() const
{
  return id_;
}
 
inline int SocketRef::index() const
{
  return index_;
}
 
inline bool SocketRef::is_input() const
{
  return is_input_;
}
 
inline bool SocketRef::is_output() const
{
  return !is_input_;
}
 
inline const SocketRef &SocketRef::as_base() const
{
  return *this;
}
 
inline const InputSocketRef &SocketRef::as_input() const
{
  BLI_assert(this->is_input());
  return static_cast<const InputSocketRef &>(*this);
}
 
inline const OutputSocketRef &SocketRef::as_output() const
{
  BLI_assert(this->is_output());
  return static_cast<const OutputSocketRef &>(*this);
}
 
inline PointerRNA *SocketRef::rna() const
{
  return const_cast<PointerRNA *>(&rna_);
}
 
inline StringRefNull SocketRef::idname() const
{
  return bsocket_->idname;
}
 
inline StringRefNull SocketRef::name() const
{
  return bsocket_->name;
}
 
inline StringRefNull SocketRef::identifier() const
{
  return bsocket_->identifier;
}
 
inline bNodeSocketType *SocketRef::typeinfo() const
{
  return bsocket_->typeinfo;
}
 
inline bNodeSocket *SocketRef::bsocket() const
{
  return bsocket_;
}
 
inline bNode *SocketRef::bnode() const
{
  return node_->bnode();
}
 
inline bNodeTree *SocketRef::btree() const
{
  return node_->btree();
}
 
inline bool SocketRef::is_available() const
{
  return (bsocket_->flag & SOCK_UNAVAIL) == 0;
}
 
inline bool SocketRef::is_undefined() const
{
  return bsocket_->typeinfo == &NodeSocketTypeUndefined;
}
 
inline void *SocketRef::default_value() const
{
  return bsocket_->default_value;
}
 
template<typename T> inline T *SocketRef::default_value() const
{
  return (T *)bsocket_->default_value;
}
 
/* --------------------------------------------------------------------
 * InputSocketRef inline methods.
 */
 
inline Span<const OutputSocketRef *> InputSocketRef::logically_linked_sockets() const
{
  return logically_linked_sockets_.as_span().cast<const OutputSocketRef *>();
}
 
inline Span<const OutputSocketRef *> InputSocketRef::directly_linked_sockets() const
{
  return directly_linked_sockets_.cast<const OutputSocketRef *>();
}
 
inline bool InputSocketRef::is_multi_input_socket() const
{
  return bsocket_->flag & SOCK_MULTI_INPUT;
}
 
/* --------------------------------------------------------------------
 * OutputSocketRef inline methods.
 */
 
inline Span<const InputSocketRef *> OutputSocketRef::logically_linked_sockets() const
{
  return logically_linked_sockets_.as_span().cast<const InputSocketRef *>();
}
 
inline Span<const InputSocketRef *> OutputSocketRef::directly_linked_sockets() const
{
  return directly_linked_sockets_.cast<const InputSocketRef *>();
}
 
/* --------------------------------------------------------------------
 * NodeRef inline methods.
 */
 
inline const NodeTreeRef &NodeRef::tree() const
{
  return *tree_;
}
 
inline Span<const InputSocketRef *> NodeRef::inputs() const
{
  return inputs_;
}
 
inline Span<const OutputSocketRef *> NodeRef::outputs() const
{
  return outputs_;
}
 
inline Span<const InternalLinkRef *> NodeRef::internal_links() const
{
  return internal_links_;
}
 
inline const InputSocketRef &NodeRef::input(int index) const
{
  return *inputs_[index];
}
 
inline const OutputSocketRef &NodeRef::output(int index) const
{
  return *outputs_[index];
}
 
inline bNode *NodeRef::bnode() const
{
  return bnode_;
}
 
inline bNodeTree *NodeRef::btree() const
{
  return tree_->btree();
}
 
inline PointerRNA *NodeRef::rna() const
{
  return const_cast<PointerRNA *>(&rna_);
}
 
inline StringRefNull NodeRef::idname() const
{
  return bnode_->idname;
}
 
inline StringRefNull NodeRef::name() const
{
  return bnode_->name;
}
 
inline bNodeType *NodeRef::typeinfo() const
{
  return bnode_->typeinfo;
}
 
inline int NodeRef::id() const
{
  return id_;
}
 
inline bool NodeRef::is_reroute_node() const
{
  return bnode_->type == NODE_REROUTE;
}
 
inline bool NodeRef::is_group_node() const
{
  return bnode_->type == NODE_GROUP || bnode_->type == NODE_CUSTOM_GROUP;
}
 
inline bool NodeRef::is_group_input_node() const
{
  return bnode_->type == NODE_GROUP_INPUT;
}
 
inline bool NodeRef::is_group_output_node() const
{
  return bnode_->type == NODE_GROUP_OUTPUT;
}
 
inline bool NodeRef::is_frame() const
{
  return bnode_->type == NODE_FRAME;
}
 
inline bool NodeRef::is_undefined() const
{
  return bnode_->typeinfo == &NodeTypeUndefined;
}
 
inline bool NodeRef::is_muted() const
{
  return (bnode_->flag & NODE_MUTED) != 0;
}
 
inline void *NodeRef::storage() const
{
  return bnode_->storage;
}
 
template<typename T> inline T *NodeRef::storage() const
{
  return (T *)bnode_->storage;
}
 
/* --------------------------------------------------------------------
 * LinkRef inline methods.
 */
 
inline const OutputSocketRef &LinkRef::from() const
{
  return *from_;
}
 
inline const InputSocketRef &LinkRef::to() const
{
  return *to_;
}
 
inline bNodeLink *LinkRef::blink() const
{
  return blink_;
}
 
inline bool LinkRef::is_muted() const
{
  return blink_->flag & NODE_LINK_MUTED;
}
 
/* --------------------------------------------------------------------
 * InternalLinkRef inline methods.
 */
 
inline const InputSocketRef &InternalLinkRef::from() const
{
  return *from_;
}
 
inline const OutputSocketRef &InternalLinkRef::to() const
{
  return *to_;
}
 
inline bNodeLink *InternalLinkRef::blink() const
{
  return blink_;
}
 
/* --------------------------------------------------------------------
 * NodeTreeRef inline methods.
 */
 
inline Span<const NodeRef *> NodeTreeRef::nodes() const
{
  return nodes_by_id_;
}
 
inline Span<const NodeRef *> NodeTreeRef::nodes_by_type(StringRefNull idname) const
{
  const bNodeType *nodetype = nodeTypeFind(idname.c_str());
  return this->nodes_by_type(nodetype);
}
 
inline Span<const NodeRef *> NodeTreeRef::nodes_by_type(const bNodeType *nodetype) const
{
  return nodes_by_type_.lookup(nodetype);
}
 
inline Span<const SocketRef *> NodeTreeRef::sockets() const
{
  return sockets_by_id_;
}
 
inline Span<const InputSocketRef *> NodeTreeRef::input_sockets() const
{
  return input_sockets_;
}
 
inline Span<const OutputSocketRef *> NodeTreeRef::output_sockets() const
{
  return output_sockets_;
}
 
inline Span<const LinkRef *> NodeTreeRef::links() const
{
  return links_;
}
 
inline bNodeTree *NodeTreeRef::btree() const
{
  return btree_;
}
 
inline StringRefNull NodeTreeRef::name() const
{
  return btree_->id.name + 2;
}
 
}  // namespace blender::nodes