/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

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
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

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
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/

#include "CCIMEDispatcher.h"

#include <list>

NS_CC_BEGIN

//////////////////////////////////////////////////////////////////////////
// add/remove delegate in CCIMEDelegate Cons/Destructor
//////////////////////////////////////////////////////////////////////////

CCIMEDelegate::CCIMEDelegate()
{
    CCIMEDispatcher::sharedDispatcher()->addDelegate(this);
}

CCIMEDelegate::~CCIMEDelegate()
{
    CCIMEDispatcher::sharedDispatcher()->removeDelegate(this);
}

bool CCIMEDelegate::attachWithIME()
{
    return CCIMEDispatcher::sharedDispatcher()->attachDelegateWithIME(this);
}

bool CCIMEDelegate::detachWithIME()
{
    return CCIMEDispatcher::sharedDispatcher()->detachDelegateWithIME(this);
}

//////////////////////////////////////////////////////////////////////////

typedef std::list< CCIMEDelegate * > DelegateList;
typedef std::list< CCIMEDelegate * >::iterator  DelegateIter;

//////////////////////////////////////////////////////////////////////////
// Delegate List manage class
//////////////////////////////////////////////////////////////////////////

class CCIMEDispatcher::Impl
{
public:
    Impl()
    {
    }

    ~Impl()
    {

    }

    void init()
    {
        _delegateWithIme = 0;
    }

    DelegateIter findDelegate(CCIMEDelegate* pDelegate)
    {
        DelegateIter end = _delegateList.end();
        for (DelegateIter iter = _delegateList.begin(); iter != end; ++iter)
        {
            if (pDelegate == *iter)
            {
                return iter;
            }
        }
        return end;
    }

    DelegateList    _delegateList;
    CCIMEDelegate*  _delegateWithIme;
};

//////////////////////////////////////////////////////////////////////////
// Cons/Destructor
//////////////////////////////////////////////////////////////////////////

CCIMEDispatcher::CCIMEDispatcher()
: _impl(new CCIMEDispatcher::Impl)
{
    _impl->init();
}

CCIMEDispatcher::~CCIMEDispatcher()
{
    CC_SAFE_DELETE(_impl);
}

//////////////////////////////////////////////////////////////////////////
// Add/Attach/Remove CCIMEDelegate
//////////////////////////////////////////////////////////////////////////

void CCIMEDispatcher::addDelegate(CCIMEDelegate* pDelegate)
{
    if (! pDelegate || ! _impl)
    {
        return;
    }
    if (_impl->_delegateList.end() != _impl->findDelegate(pDelegate))
    {
        // pDelegate already in list
        return;
    }
    _impl->_delegateList.push_front(pDelegate);
}

bool CCIMEDispatcher::attachDelegateWithIME(CCIMEDelegate * pDelegate)
{
    bool bRet = false;
    do
    {
        CC_BREAK_IF(! _impl || ! pDelegate);

        DelegateIter end  = _impl->_delegateList.end();
        DelegateIter iter = _impl->findDelegate(pDelegate);

        // if pDelegate is not in delegate list, return
        CC_BREAK_IF(end == iter);

        if (_impl->_delegateWithIme)
        {
            // if old delegate canDetachWithIME return false 
            // or pDelegate canAttachWithIME return false,
            // do nothing.
            CC_BREAK_IF(! _impl->_delegateWithIme->canDetachWithIME()
                || ! pDelegate->canAttachWithIME());

            // detach first
            CCIMEDelegate * pOldDelegate = _impl->_delegateWithIme;
            _impl->_delegateWithIme = 0;
            pOldDelegate->didDetachWithIME();

            _impl->_delegateWithIme = *iter;
            pDelegate->didAttachWithIME();
            bRet = true;
            break;
        }

        // delegate hasn't attached to IME yet
        CC_BREAK_IF(! pDelegate->canAttachWithIME());

        _impl->_delegateWithIme = *iter;
        pDelegate->didAttachWithIME();
        bRet = true;
    } while (0);
    return bRet;
}

bool CCIMEDispatcher::detachDelegateWithIME(CCIMEDelegate * pDelegate)
{
    bool bRet = false;
    do
    {
        CC_BREAK_IF(! _impl || ! pDelegate);

        // if pDelegate is not the current delegate attached to IME, return
        CC_BREAK_IF(_impl->_delegateWithIme != pDelegate);

        CC_BREAK_IF(! pDelegate->canDetachWithIME());

        _impl->_delegateWithIme = 0;
        pDelegate->didDetachWithIME();
        bRet = true;
    } while (0);
    return bRet;
}

void CCIMEDispatcher::removeDelegate(CCIMEDelegate* pDelegate)
{
    do 
    {
        CC_BREAK_IF(! pDelegate || ! _impl);

        DelegateIter iter = _impl->findDelegate(pDelegate);
        DelegateIter end  = _impl->_delegateList.end();
        CC_BREAK_IF(end == iter);

        if (_impl->_delegateWithIme)

        if (*iter == _impl->_delegateWithIme)
        {
            _impl->_delegateWithIme = 0;
        }
        _impl->_delegateList.erase(iter);
    } while (0);
}

//////////////////////////////////////////////////////////////////////////
// dispatch text message
//////////////////////////////////////////////////////////////////////////

void CCIMEDispatcher::dispatchInsertText(const char * pText, int nLen)
{
    do 
    {
        CC_BREAK_IF(! _impl || ! pText || nLen <= 0);

        // there is no delegate attached to IME
        CC_BREAK_IF(! _impl->_delegateWithIme);

        _impl->_delegateWithIme->insertText(pText, nLen);
    } while (0);
}

void CCIMEDispatcher::dispatchDeleteBackward()
{
    do 
    {
        CC_BREAK_IF(! _impl);

        // there is no delegate attached to IME
        CC_BREAK_IF(! _impl->_delegateWithIme);

        _impl->_delegateWithIme->deleteBackward();
    } while (0);
}

const char * CCIMEDispatcher::getContentText()
{
    const char * pszContentText = 0;
    if (_impl && _impl->_delegateWithIme)
    {
        pszContentText = _impl->_delegateWithIme->getContentText();
    }
    return (pszContentText) ? pszContentText : "";
}

//////////////////////////////////////////////////////////////////////////
// dispatch keyboard message
//////////////////////////////////////////////////////////////////////////

void CCIMEDispatcher::dispatchKeyboardWillShow(CCIMEKeyboardNotificationInfo& info)
{
    if (_impl)
    {
        CCIMEDelegate * pDelegate = 0;
        DelegateIter last = _impl->_delegateList.end();
        for (DelegateIter first = _impl->_delegateList.begin(); first != last; ++first)
        {
            pDelegate = *(first);
            if (pDelegate)
            {
                pDelegate->keyboardWillShow(info);
            }
        }
    }
}

void CCIMEDispatcher::dispatchKeyboardDidShow(CCIMEKeyboardNotificationInfo& info)
{
    if (_impl)
    {
        CCIMEDelegate * pDelegate = 0;
        DelegateIter last = _impl->_delegateList.end();
        for (DelegateIter first = _impl->_delegateList.begin(); first != last; ++first)
        {
            pDelegate = *(first);
            if (pDelegate)
            {
                pDelegate->keyboardDidShow(info);
            }
        }
    }
}

void CCIMEDispatcher::dispatchKeyboardWillHide(CCIMEKeyboardNotificationInfo& info)
{
    if (_impl)
    {
        CCIMEDelegate * pDelegate = 0;
        DelegateIter last = _impl->_delegateList.end();
        for (DelegateIter first = _impl->_delegateList.begin(); first != last; ++first)
        {
            pDelegate = *(first);
            if (pDelegate)
            {
                pDelegate->keyboardWillHide(info);
            }
        }
    }
}

void CCIMEDispatcher::dispatchKeyboardDidHide(CCIMEKeyboardNotificationInfo& info)
{
    if (_impl)
    {
        CCIMEDelegate * pDelegate = 0;
        DelegateIter last = _impl->_delegateList.end();
        for (DelegateIter first = _impl->_delegateList.begin(); first != last; ++first)
        {
            pDelegate = *(first);
            if (pDelegate)
            {
                pDelegate->keyboardDidHide(info);
            }
        }
    }
}

//////////////////////////////////////////////////////////////////////////
// protected member function
//////////////////////////////////////////////////////////////////////////


//////////////////////////////////////////////////////////////////////////
// static member function
//////////////////////////////////////////////////////////////////////////

CCIMEDispatcher* CCIMEDispatcher::sharedDispatcher()
{
    static CCIMEDispatcher s_instance;
    return &s_instance;
}

NS_CC_END