axmol/extensions/GUI/CCScrollView/CCSorting.cpp

/****************************************************************************
 Copyright (c) 2012 cocos2d-x.org
 Copyright (c) 2010 Sangwoo Im
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 THE SOFTWARE.
 ****************************************************************************/

#include "CCSorting.h"

NS_CC_EXT_BEGIN

class CCSortedObject : public CCObject, public CCSortableObject
{
public:
    CCSortedObject() : objectID(0) {}
    virtual void setObjectID(unsigned int objectID) { this->objectID = objectID; }
    virtual unsigned int getObjectID() { return objectID; }
private:
    unsigned int objectID;
};

static int _compareObject(const void * val1, const void * val2)
{
    CCSortableObject* operand1;
    CCSortableObject* operand2;

    operand1 = (CCSortableObject*)val1;
    operand2 = (CCSortableObject*)val2;

    if (operand1->getObjectID() > operand2->getObjectID())
    {
        return 1;
    } 
    else if (operand1->getObjectID() < operand2->getObjectID()) {
        return -1;
    }
    return 0;
}


void CCArrayForObjectSorting::insertSortedObject(CCSortableObject* object)
{
    unsigned int idx;
    CCObject* pObj = dynamic_cast<CCObject*>(object);
    CCAssert(pObj, "Invalid parameter.");
    idx = this->indexOfSortedObject(object);
    
    this->insertObject(pObj, idx);
}

void CCArrayForObjectSorting::removeSortedObject(CCSortableObject* object)
{
    if (this->count() == 0) {
        return;
    }
    unsigned int idx;
    CCSortableObject* foundObj;
    idx = this->indexOfSortedObject(object);
    
    if (idx < this->count() && idx != CC_INVALID_INDEX) {
        foundObj = dynamic_cast<CCSortableObject*>(this->objectAtIndex(idx));
        
        if(foundObj->getObjectID() == object->getObjectID()) {
            this->removeObjectAtIndex(idx);
        }
    }
}

void CCArrayForObjectSorting::setObjectID_ofSortedObject(unsigned int tag, CCSortableObject* object)
{
    CCSortableObject* foundObj;
    unsigned int  idx;
    
    idx = this->indexOfSortedObject(object);
    if (idx < this->count() && idx != CC_INVALID_INDEX)
    {
        foundObj = dynamic_cast<CCSortableObject*>(this->objectAtIndex(idx));
        CCObject* pObj = dynamic_cast<CCObject*>(foundObj);
        pObj->retain();
        
        if(foundObj->getObjectID() == object->getObjectID()) {
            this->removeObjectAtIndex(idx);
            foundObj->setObjectID(tag);
            this->insertSortedObject(foundObj);
            pObj->release();
        } else {
            pObj->release();
        }
    }
}

CCSortableObject* CCArrayForObjectSorting::objectWithObjectID(unsigned int tag)
{
    if (this->count() == 0) {
        return NULL;
    }
    
    unsigned int  idx;
    CCSortableObject* foundObj;
    
    foundObj = new CCSortedObject();
    foundObj->setObjectID(tag);
    
    idx      = this->indexOfSortedObject(foundObj);
    
    ((CCSortedObject*)foundObj)->release();
    foundObj = NULL;
    
    if (idx < this->count() && idx != CC_INVALID_INDEX)
    {
        foundObj = dynamic_cast<CCSortableObject*>(this->objectAtIndex(idx));
        if (foundObj->getObjectID() != tag) {
            foundObj = NULL;
        }
    }
    
    return foundObj;
}

unsigned int CCArrayForObjectSorting::indexOfSortedObject(CCSortableObject* object)
{
    unsigned int  idx = 0;
    if (object)
    {
 //       CCObject* pObj = (CCObject*)bsearch((CCObject*)&object, data->arr, data->num, sizeof(CCObject*), _compareObject);
        // FIXME: need to use binary search to improve performance
        CCObject* pObj = NULL;
        unsigned int uPrevObjectID = 0;
        unsigned int uOfSortObjectID = object->getObjectID();

        CCARRAY_FOREACH(this, pObj)
        {
            CCSortableObject* pSortableObj = dynamic_cast<CCSortableObject*>(pObj);
            unsigned int uCurObjectID = pSortableObj->getObjectID();
            if (  (uOfSortObjectID == uCurObjectID)
                  || (uOfSortObjectID >= uPrevObjectID && uOfSortObjectID < uCurObjectID))
            {
                break;
            }
            
            uPrevObjectID = uCurObjectID;
            idx++;
        }
    }
    else
    {
        idx = CC_INVALID_INDEX;
    }
    return idx;
}

NS_CC_EXT_END