text: /****************************************************************************
  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 "CCTextFieldTTF.h"
  
  #include "CCDirector.h"
  #include "CCEGLView.h"
  
  NS_CC_BEGIN
  
  static int _calcCharCount(const char * pszText)
  {
      int n = 0;
      char ch = 0;
      while ((ch = *pszText))
      {
          CC_BREAK_IF(! ch);
  
          if (0x80 != (0xC0 & ch))
          {
              ++n;
          }
          ++pszText;
      }
      return n;
  }
  
  //////////////////////////////////////////////////////////////////////////
  // constructor and destructor
  //////////////////////////////////////////////////////////////////////////
  
  TextFieldTTF::TextFieldTTF()
  : _delegate(0)
  , _charCount(0)
  , _inputText(new std::string)
  , _placeHolder(new std::string)   // prevent LabelTTF initWithString assertion
  , _secureTextEntry(false)
  {
      _colorSpaceHolder.r = _colorSpaceHolder.g = _colorSpaceHolder.b = 127;
  }
  
  TextFieldTTF::~TextFieldTTF()
  {
      CC_SAFE_DELETE(_inputText);
      CC_SAFE_DELETE(_placeHolder);
  }
  
  //////////////////////////////////////////////////////////////////////////
  // static constructor
  //////////////////////////////////////////////////////////////////////////
  
  TextFieldTTF * TextFieldTTF::textFieldWithPlaceHolder(const char *placeholder, const Size& dimensions, TextHAlignment alignment, const char *fontName, float fontSize)
  {
      TextFieldTTF *pRet = new TextFieldTTF();
      if(pRet && pRet->initWithPlaceHolder("", dimensions, alignment, fontName, fontSize))
      {
          pRet->autorelease();
          if (placeholder)
          {
              pRet->setPlaceHolder(placeholder);
          }
          return pRet;
      }
      CC_SAFE_DELETE(pRet);
      return NULL;
  }
  
  TextFieldTTF * TextFieldTTF::textFieldWithPlaceHolder(const char *placeholder, const char *fontName, float fontSize)
  {
      TextFieldTTF *pRet = new TextFieldTTF();
      if(pRet && pRet->initWithString("", fontName, fontSize))
      {
          pRet->autorelease();
          if (placeholder)
          {
              pRet->setPlaceHolder(placeholder);
          }
          return pRet;
      }
      CC_SAFE_DELETE(pRet);
      return NULL;
  }
  
  //////////////////////////////////////////////////////////////////////////
  // initialize
  //////////////////////////////////////////////////////////////////////////
  
  bool TextFieldTTF::initWithPlaceHolder(const char *placeholder, const Size& dimensions, TextHAlignment alignment, const char *fontName, float fontSize)
  {
      if (placeholder)
      {
          CC_SAFE_DELETE(_placeHolder);
          _placeHolder = new std::string(placeholder);
      }
      return LabelTTF::initWithString(_placeHolder->c_str(), fontName, fontSize, dimensions, alignment);
  }
  bool TextFieldTTF::initWithPlaceHolder(const char *placeholder, const char *fontName, float fontSize)
  {
      if (placeholder)
      {
          CC_SAFE_DELETE(_placeHolder);
          _placeHolder = new std::string(placeholder);
      }
      return LabelTTF::initWithString(_placeHolder->c_str(), fontName, fontSize);
  }
  
  //////////////////////////////////////////////////////////////////////////
  // IMEDelegate
  //////////////////////////////////////////////////////////////////////////
  
  bool TextFieldTTF::attachWithIME()
  {
      bool bRet = IMEDelegate::attachWithIME();
      if (bRet)
      {
          // open keyboard
          EGLView * pGlView = Director::getInstance()->getOpenGLView();
          if (pGlView)
          {
              pGlView->setIMEKeyboardState(true);
          }
      }
      return bRet;
  }
  
  bool TextFieldTTF::detachWithIME()
  {
      bool bRet = IMEDelegate::detachWithIME();
      if (bRet)
      {
          // close keyboard
          EGLView * pGlView = Director::getInstance()->getOpenGLView();
          if (pGlView)
          {
              pGlView->setIMEKeyboardState(false);
          }
      }
      return bRet;
  }
  
  bool TextFieldTTF::canAttachWithIME()
  {
      return (_delegate) ? (! _delegate->onTextFieldAttachWithIME(this)) : true;
  }
  
  bool TextFieldTTF::canDetachWithIME()
  {
      return (_delegate) ? (! _delegate->onTextFieldDetachWithIME(this)) : true;
  }
  
  void TextFieldTTF::insertText(const char * text, int len)
  {
      std::string sInsert(text, len);
  
      // insert \n means input end
      int nPos = sInsert.find('\n');
      if ((int)sInsert.npos != nPos)
      {
          len = nPos;
          sInsert.erase(nPos);
      }
  
      if (len > 0)
      {
          if (_delegate && _delegate->onTextFieldInsertText(this, sInsert.c_str(), len))
          {
              // delegate doesn't want to insert text
              return;
          }
  
          _charCount += _calcCharCount(sInsert.c_str());
          std::string sText(*_inputText);
          sText.append(sInsert);
          setString(sText.c_str());
      }
  
      if ((int)sInsert.npos == nPos) {
          return;
      }
  
      // '\n' inserted, let delegate process first
      if (_delegate && _delegate->onTextFieldInsertText(this, "\n", 1))
      {
          return;
      }
  
      // if delegate hasn't processed, detach from IME by default
      detachWithIME();
  }
  
  void TextFieldTTF::deleteBackward()
  {
      int nStrLen = _inputText->length();
      if (! nStrLen)
      {
          // there is no string
          return;
      }
  
      // get the delete byte number
      int nDeleteLen = 1;    // default, erase 1 byte
  
      while(0x80 == (0xC0 & _inputText->at(nStrLen - nDeleteLen)))
      {
          ++nDeleteLen;
      }
  
      if (_delegate && _delegate->onTextFieldDeleteBackward(this, _inputText->c_str() + nStrLen - nDeleteLen, nDeleteLen))
      {
          // delegate doesn't wan't to delete backwards
          return;
      }
  
      // if all text deleted, show placeholder string
      if (nStrLen <= nDeleteLen)
      {
          CC_SAFE_DELETE(_inputText);
          _inputText = new std::string;
          _charCount = 0;
          LabelTTF::setString(_placeHolder->c_str());
          return;
      }
  
      // set new input text
      std::string sText(_inputText->c_str(), nStrLen - nDeleteLen);
      setString(sText.c_str());
  }
  
  const char * TextFieldTTF::getContentText()
  {
      return _inputText->c_str();
  }
  
  void TextFieldTTF::draw()
  {
      if (_delegate && _delegate->onDraw(this))
      {
          return;
      }
      if (_inputText->length())
      {
          LabelTTF::draw();
          return;
      }
  
      // draw placeholder
      Color3B color = getColor();
      setColor(_colorSpaceHolder);
      LabelTTF::draw();
      setColor(color);
  }
  
  const Color3B& TextFieldTTF::getColorSpaceHolder()
  {
      return _colorSpaceHolder;
  }
  
  void TextFieldTTF::setColorSpaceHolder(const Color3B& color)
  {
      _colorSpaceHolder = color;
  }
  
  //////////////////////////////////////////////////////////////////////////
  // properties
  //////////////////////////////////////////////////////////////////////////
  
  // input text property
  void TextFieldTTF::setString(const char *text)
  {
      static char bulletString[] = {(char)0xe2, (char)0x80, (char)0xa2, (char)0x00};
      std::string displayText;
      int length;
  
      CC_SAFE_DELETE(_inputText);
  
      if (text)
      {
          _inputText = new std::string(text);
          displayText = *_inputText;
          if (_secureTextEntry)
          {
              displayText = "";
              length = _inputText->length();
              while (length)
              {
                  displayText.append(bulletString);
                  --length;
              }
          }
      }
      else
      {
          _inputText = new std::string;
      }
  
      // if there is no input text, display placeholder instead
      if (! _inputText->length())
      {
          LabelTTF::setString(_placeHolder->c_str());
      }
      else
      {
          LabelTTF::setString(displayText.c_str());
      }
      _charCount = _calcCharCount(_inputText->c_str());
  }
  
  const char* TextFieldTTF::getString(void) const
  {
      return _inputText->c_str();
  }
  
  // place holder text property
  void TextFieldTTF::setPlaceHolder(const char * text)
  {
      CC_SAFE_DELETE(_placeHolder);
      _placeHolder = (text) ? new std::string(text) : new std::string;
      if (! _inputText->length())
      {
          LabelTTF::setString(_placeHolder->c_str());
      }
  }
  
  const char * TextFieldTTF::getPlaceHolder(void)
  {
      return _placeHolder->c_str();
  }
  
  // secureTextEntry
  void TextFieldTTF::setSecureTextEntry(bool value)
  {
      if (_secureTextEntry != value)
      {
          _secureTextEntry = value;
          setString(getString());
      }
  }
  
  bool TextFieldTTF::isSecureTextEntry()
  {
      return _secureTextEntry;
  }
  
  NS_CC_END
  