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
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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,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 ****************************************************************************/

#include "CCSorting.h"
#include "ccCArray.h"


NS_CC_EXT_BEGIN

class SortedObject : public Object, public SortableObject
{
public:
    SortedObject() : objectID(0) {}
    virtual void setObjectID(unsigned int objectID) { this->objectID = objectID; }
    virtual unsigned int getObjectID() { return objectID; }
private:
    unsigned int objectID;
};

#if 0
static int _compareObject(const void * val1, const void * val2)
{
    SortableObject* operand1;
    SortableObject* operand2;

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

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


void ArrayForObjectSorting::insertSortedObject(SortableObject* object)
{
    unsigned int idx;
    Object* pObj = dynamic_cast<Object*>(object);
    CCASSERT(pObj, "Invalid parameter.");
    idx = this->indexOfSortedObject(object);
    
    this->insertObject(pObj, idx);
}

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

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

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

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

        CCARRAY_FOREACH(this, pObj)
        {
            SortableObject* pSortableObj = dynamic_cast<SortableObject*>(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