FaceArray.h

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/*
 * $Revision: 2027 $
 * 
 * last checkin:
 *   $Author: gutwenger $ 
 *   $Date: 2010-09-01 11:55:17 +0200 (Wed, 01 Sep 2010) $ 
 ***************************************************************/
 
#ifdef _MSC_VER
#pragma once
#endif

#ifndef OGDF_FACE_ARRAY_H
#define OGDF_FACE_ARRAY_H


#include <ogdf/basic/Array.h>
#include <ogdf/basic/CombinatorialEmbedding.h>


namespace ogdf {



class FaceArrayBase {
    ListIterator<FaceArrayBase*> m_it;

public:
    const ConstCombinatorialEmbedding *m_pEmbedding; 

    FaceArrayBase() : m_pEmbedding(0) { }
    FaceArrayBase(const ConstCombinatorialEmbedding *pE) : m_pEmbedding(pE) {
        if(pE) m_it = pE->registerArray(this);
    }

    // destructor, unregisters the array
    virtual ~FaceArrayBase() {
        if (m_pEmbedding) m_pEmbedding->unregisterArray(m_it);
    }

    // event interface used by CombinatorialEmbedding
    virtual void enlargeTable(int newTableSize) = 0;
    virtual void reinit(int initTableSize) = 0;

    void reregister(const ConstCombinatorialEmbedding *pE) {
        if (m_pEmbedding) m_pEmbedding->unregisterArray(m_it);
        if ((m_pEmbedding = pE) != 0) m_it = pE->registerArray(this);
    }
}; // class FaceArrayBase


//---------------------------------------------------------
// FaceArray<T>
// associative arrays for edges (with table doubling)
//---------------------------------------------------------

template<class T> class FaceArray : private Array<T>, protected FaceArrayBase {
    T m_x; 

public:
    FaceArray() : Array<T>(), FaceArrayBase() { }
    FaceArray(const ConstCombinatorialEmbedding &E) :
        Array<T>(E.faceArrayTableSize()), FaceArrayBase(&E) { }

    FaceArray(const ConstCombinatorialEmbedding &E, const T &x) :
        Array<T>(0,E.faceArrayTableSize()-1,x), FaceArrayBase(&E), m_x(x) { }

    FaceArray(const FaceArray<T> &A) : Array<T>(A), FaceArrayBase(A.m_pEmbedding), m_x(A.m_x) { }

    bool valid() const { return (Array<T>::low() <= Array<T>::high()); }

    const ConstCombinatorialEmbedding *embeddingOf() const {
        return m_pEmbedding;
    }

    const T &operator[](face f) const {
        OGDF_ASSERT(f != 0 && f->embeddingOf() == m_pEmbedding)
        return Array<T>::operator [](f->index());
    }

    T &operator[](face f) {
        OGDF_ASSERT(f != 0 && f->embeddingOf() == m_pEmbedding)
        return Array<T>::operator [](f->index());
    }


    const T &operator[](int index) const {
        return Array<T>::operator [](index);
    }


    T &operator[](int index) {
        return Array<T>::operator [](index);
    }

    FaceArray<T> &operator=(const FaceArray<T> &a) {
        Array<T>::operator =(a);
        m_x = a.m_x;
        reregister(a.m_pEmbedding);
        return *this;
    }

    void init() {
        Array<T>::init(); reregister(0);
    }

    void init(const ConstCombinatorialEmbedding &E) {
        Array<T>::init(E.faceArrayTableSize()); reregister(&E);
    }


    void init(const ConstCombinatorialEmbedding &E, const T &x) {
        Array<T>::init(0,E.faceArrayTableSize()-1, m_x = x); reregister(&E);
    }

    void fill(const T &x) {
        int high = m_pEmbedding->maxFaceIndex();
        if(high >= 0)
            Array<T>::fill(0,high,x);
    }

private:
    virtual void enlargeTable(int newTableSize) {
        Array<T>::grow(newTableSize-Array<T>::size(),m_x);
    }

    virtual void reinit(int initTableSize) {
        Array<T>::init(0,initTableSize-1,m_x);
    }

    OGDF_NEW_DELETE

}; // class FaceArray<T>


} // end namespace ogdf


#endif