axmol/extensions/GUI/CCScrollView/CCSorting.cpp

/****************************************************************************
 Copyright (c) 2012 cocos2d-x.org
 Copyright (c) 2010 Sangwoo Im
 
 http://www.cocos2d-x.org
 
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 all copies or substantial portions of the Software.
 
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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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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(long id) { this->objectID = id; }
    virtual long getObjectID() { return objectID; }
private:
    long 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)
{
    Object* pObj = dynamic_cast<Object*>(object);
    CCASSERT(pObj, "Invalid parameter.");
    long idx = this->indexOfSortedObject(object);
    
    this->insertObject(pObj, idx);
}

void ArrayForObjectSorting::removeSortedObject(SortableObject* object)
{
    if (this->count() == 0) {
        return;
    }

    SortableObject* foundObj = nullptr;
    long 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 = nullptr;
    
    long  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(long tag)
{
    if (this->count() == 0) {
        return NULL;
    }
    
    SortableObject* foundObj = new SortedObject();
    foundObj->setObjectID(tag);
    
    long 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;
}

long ArrayForObjectSorting::indexOfSortedObject(SortableObject* object)
{
    long  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* obj = NULL;
        long prevObjectID = 0;
        long ofSortObjectID = object->getObjectID();

        CCARRAY_FOREACH(this, obj)
        {
            SortableObject* sortableObj = dynamic_cast<SortableObject*>(obj);
            long curObjectID = sortableObj->getObjectID();
            if (  (ofSortObjectID == curObjectID)
                  || (ofSortObjectID >= prevObjectID && ofSortObjectID < curObjectID))
            {
                break;
            }
            
            prevObjectID = curObjectID;
            idx++;
        }
    }
    else
    {
        idx = CC_INVALID_INDEX;
    }
    return idx;
}

NS_CC_EXT_END