增加GMULTIEDIT_append2bootm和GMULTIEDIT_append2head

增加GMULTIEDIT_append2bootm和GMULTIEDIT_append2head

//2007-10-12 gliethttp
//修改MultiEdit
void _Go2HeadShow(MULTIEDIT_HANDLE hObj, MULTIEDIT_OBJ* pObj)
{
    if (pObj->hText)
    {//int NumVisLines= _GetNumVisLines(hObj, pObj);
     int YDist = GUI_GetYDistOfFont(pObj->pFont);
     //int NumLines = _GetNumLines(hObj, pObj);
     int the_line;int yPos;
         /*
        the_line = pObj->CacheFirstVisibleLine;
        if(the_line == 0)the_line = NumLines+1;
        else
            {
                the_line -= NumVisLines / 3 + 1;
                if(the_line < 0)the_line = 0;
            }
        */
        the_line = 0;
        yPos = the_line * YDist;
        _SetCursorXY(hObj, pObj, 0, yPos);
        _InvalidateTextArea(hObj);
    }
}
//_Go2PrevLineShow
void _Go2BottomShow(MULTIEDIT_HANDLE hObj, MULTIEDIT_OBJ* pObj)
{
    if (pObj->hText)
    {//int NumVisLines= _GetNumVisLines(hObj, pObj);
     int YDist = GUI_GetYDistOfFont(pObj->pFont);
     int NumLines = _GetNumLines(hObj, pObj);
     int the_line;int yPos;
     //the_line = pObj->CacheFirstVisibleLine + NumVisLines + NumVisLines / 3;
        //if(pObj->CacheLineNumber >= (NumLines-1))the_line = 0;
        the_line = NumLines+1;
        yPos = the_line * YDist;
        _SetCursorXY(hObj, pObj, 0, yPos);
        _InvalidateTextArea(hObj);
    }
}
//向MultiEdit尾部追加文本
int GMULTIEDIT_Append2Bottom(MULTIEDIT_HANDLE hObj,char *text,uint8 flag)
{MULTIEDIT_OBJ* pObj;
 uint32 len = strlen(text);
  pObj = MULTIEDIT_H2P(hObj);
  WM_LOCK();
  if (_IsCharsAvailable(pObj, len)) {
    int BytesNeeded;
    BytesNeeded = len;
    if (_IsSpaceInBuffer(pObj, BytesNeeded)) {
      //int CursorOffset;
      char* pText;
      pText = (char*) GUI_ALLOC_h2p(pObj->hText);
      //CursorOffset = pObj->CursorPosByte;
      //pText += CursorOffset;
      //memmove(pText + BytesNeeded, pText, strlen(pText) + 1);
      pText += strlen(pText);
      memmove(pText,text,len + 1);
      //GUI_UC_Encode(pText, Char);
      WM_NotifyParent(hObj, WM_NOTIFICATION_VALUE_CHANGED);
      //pObj->NumChars += 1;
      //_InvalidateNumLines(pObj);
      //_InvalidateTextSizeX(pObj);
      //_InvalidateTextArea(hObj);
      _InvalidateNumChars(pObj);
      _InvalidateNumLines(pObj);
      _InvalidateTextSizeX(pObj);
      if(flag)_Go2BottomShow(hObj,pObj);
      //_ClearCache(pObj);
      WM_UNLOCK();
      return 1;
    }
  }
  WM_UNLOCK();
  return 0;
}
void _Go2Bottom(MULTIEDIT_HANDLE hObj)
{
    _Go2BottomShow(hObj,MULTIEDIT_H2P(hObj));
}
void _Go2Head(MULTIEDIT_HANDLE hObj)
{
    _Go2HeadShow(hObj,MULTIEDIT_H2P(hObj));
}
//向MultiEdit头部追加文本
GUI_HMEM GUI_ALLOC_ReallocG(GUI_HMEM hOld, int NewSize,int ItemSize) {
  GUI_HMEM hNew;
  hNew = GUI_ALLOC_AllocNoInit(NewSize);
  if (hNew && hOld) {
    void *pNew, *pOld;
    int Size, OldSize;
    OldSize = GUI_ALLOC_GetSize(hOld);
    Size = (OldSize < NewSize) ? OldSize : NewSize;
    GUI_LOCK();
    pNew = GUI_ALLOC_h2p(hNew);
    pOld = GUI_ALLOC_h2p(hOld);
    //2007-10-10 gliethttp
    //if(OldSize < NewSize)
    {char *p = (char*)pNew+ItemSize;
        pNew = p;
    }
    memcpy(pNew, pOld, Size);
    GUI_UNLOCK();
    GUI_ALLOC_Free(hOld);
  }
  return hNew;
}
static int _GIncrementBuffer(MULTIEDIT_OBJ* pObj, unsigned AddBytes,uint32 itemsize) {
  WM_HMEM hNew;
  int NewSize;
  NewSize = pObj->BufferSize + AddBytes;
  hNew = GUI_ALLOC_ReallocG(pObj->hText, NewSize,itemsize);
  if (hNew) {
    if (!(pObj->hText)) {
      char* pText;
      pText = (char*) GUI_ALLOC_h2p(hNew);
      *pText = 0;
    }
    pObj->BufferSize = NewSize;
    pObj->hText = hNew;
    return 1;
  }
  return 0;
}
static int _GIsSpaceInBuffer(MULTIEDIT_OBJ* pObj, int BytesNeeded) {
  int NumBytes = 0;
  uint32 itemsize;
  if (pObj->hText) {
    NumBytes = strlen((char*)GUI_ALLOC_h2p(pObj->hText));
  }
  itemsize = BytesNeeded;
  BytesNeeded = (BytesNeeded + NumBytes + 1) - pObj->BufferSize;
  if (BytesNeeded > 0) {
    if (!_GIncrementBuffer(pObj, BytesNeeded + MULTIEDIT_REALLOC_SIZE,itemsize)) {
      return 0;
    }
  }//2007-10-12 gliethttp
   else
       {
           return -1;
       }
  return 1;
}
int GMULTIEDIT_Append2Head(MULTIEDIT_HANDLE hObj,char *text,uint8 flag)
{MULTIEDIT_OBJ* pObj;
 uint32 len = strlen(text);
 int result;
  pObj = MULTIEDIT_H2P(hObj);
  WM_LOCK();
  if (_IsCharsAvailable(pObj, len)) {
    int BytesNeeded;
    BytesNeeded = len;
    if (result = _GIsSpaceInBuffer(pObj, BytesNeeded)) {
      //int CursorOffset;
      char* pText;
      pText = (char*) GUI_ALLOC_h2p(pObj->hText);
      //CursorOffset = pObj->CursorPosByte;
      //pText += CursorOffset;
      //memmove(pText + BytesNeeded, pText, strlen(pText) + 1);
      //pText += strlen(pText);
      //2007-10-12 gliethttp
      if(result < 0)
      {uint32 i;
       uint32 tlen;
       char *src,*dst;
           tlen = strlen(pText);
           src = pText+tlen;
           dst = src+BytesNeeded;
           tlen+=1;//'\0'数据
          for(i = 0;i < tlen;i++)
           *dst-- = *src--;
      }
      memmove(pText,text,BytesNeeded);
      //GUI_UC_Encode(pText, Char);
      WM_NotifyParent(hObj, WM_NOTIFICATION_VALUE_CHANGED);
      //pObj->NumChars += 1;
      _InvalidateNumChars(pObj);
      _InvalidateNumLines(pObj);
      _InvalidateTextSizeX(pObj);
      if(flag)_Go2HeadShow(hObj,pObj);
      //_ClearCache(pObj);
      WM_UNLOCK();
      return 1;
    }
  }
  WM_UNLOCK();
  return 0;
}