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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): David Salinas
*
* Copyright (C) 2014 Inria
*
* Modification(s):
* - YYYY/MM Author: Description of the modification
*/
#ifndef SKELETON_BLOCKER_SKELETON_BLOCKER_COMPLEX_VISITOR_H_
#define SKELETON_BLOCKER_SKELETON_BLOCKER_COMPLEX_VISITOR_H_
#include <gudhi/Skeleton_blocker/Skeleton_blocker_simplex.h>
namespace Gudhi {
namespace skeleton_blocker {
// TODO(DS): to be constified
/**
*@class Skeleton_blocker_complex_visitor
*@brief Interface for a visitor of a simplicial complex.
*/
template<typename Vertex_handle>
class Skeleton_blocker_complex_visitor {
public:
virtual ~Skeleton_blocker_complex_visitor() { }
virtual void on_add_vertex(Vertex_handle) = 0;
virtual void on_remove_vertex(Vertex_handle) = 0;
virtual void on_add_edge_without_blockers(Vertex_handle a, Vertex_handle b) = 0;
virtual void on_remove_edge(Vertex_handle a, Vertex_handle b) = 0;
/**
* @brief Called when an edge changes, during the contraction of
* an edge
*/
virtual void on_changed_edge(Vertex_handle a, Vertex_handle b) = 0;
/**
* @brief Called when performing an edge contraction when
* an edge bx is replaced by an edge ax (not already present).
* Precisely, this methods is called this way in contract_edge :
* add_edge_without_blockers(a,x)
* on_swaped_edge(a,b,x)
* remove_edge(b,x)
*/
virtual void on_swaped_edge(Vertex_handle a, Vertex_handle b,
Vertex_handle x) = 0;
virtual void on_add_blocker(
const Skeleton_blocker_simplex<Vertex_handle>&) = 0;
virtual void on_delete_blocker(
const Skeleton_blocker_simplex<Vertex_handle>*) = 0;
};
/**
*@class Dummy_complex_visitor
*@brief A dummy visitor of a simplicial complex that does nothing
*
*/
template<typename Vertex_handle>
class Dummy_complex_visitor : public Skeleton_blocker_complex_visitor<
Vertex_handle> {
public:
void on_add_vertex(Vertex_handle) { }
void on_remove_vertex(Vertex_handle) { }
void on_add_edge_without_blockers(Vertex_handle a, Vertex_handle b) { }
void on_remove_edge(Vertex_handle a, Vertex_handle b) { }
void on_changed_edge(Vertex_handle a, Vertex_handle b) { }
void on_swaped_edge(Vertex_handle a, Vertex_handle b, Vertex_handle x) { }
void on_add_blocker(const Skeleton_blocker_simplex<Vertex_handle>&) { }
void on_delete_blocker(const Skeleton_blocker_simplex<Vertex_handle>*) { }
};
/**
*@class Print_complex_visitor
*@brief A visitor that prints the visit information.
*
*/
template<typename Vertex_handle>
class Print_complex_visitor : public Skeleton_blocker_complex_visitor<
Vertex_handle> {
public:
void on_add_vertex(Vertex_handle v) {
std::cerr << "on_add_vertex:" << v << std::endl;
}
void on_remove_vertex(Vertex_handle v) {
std::cerr << "on_remove_vertex:" << v << std::endl;
}
void on_add_edge_without_blockers(Vertex_handle a, Vertex_handle b) {
std::cerr << "on_add_edge_without_blockers:" << a << "," << b << std::endl;
}
void on_remove_edge(Vertex_handle a, Vertex_handle b) {
std::cerr << "on_remove_edge:" << a << "," << b << std::endl;
}
void on_changed_edge(Vertex_handle a, Vertex_handle b) {
std::cerr << "on_changed_edge:" << a << "," << b << std::endl;
}
void on_swaped_edge(Vertex_handle a, Vertex_handle b, Vertex_handle x) {
std::cerr << "on_swaped_edge:" << a << "," << b << "," << x << std::endl;
}
void on_add_blocker(const Skeleton_blocker_simplex<Vertex_handle>& b) {
std::cerr << "on_add_blocker:" << b << std::endl;
}
void on_delete_blocker(const Skeleton_blocker_simplex<Vertex_handle>* b) {
std::cerr << "on_delete_blocker:" << b << std::endl;
}
};
} // namespace skeleton_blocker
namespace skbl = skeleton_blocker;
} // namespace Gudhi
#endif // SKELETON_BLOCKER_SKELETON_BLOCKER_COMPLEX_VISITOR_H_
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