GetClipboardData(CF_UNICODETEXT);

Question

请告诉我,为什么我会遇到这个问题:

• 如果剪贴板包含unicode字符(eq russian)我只得到第一个选定的单词."空间"字符前的第一个字.

• 如果剪贴板不包含unicode字符(仅限英文),我将获得所选文本的第一个字符.

获取所选文字:

CStringA getClipboard()
{
     CStringA strData;

     if (OpenClipboard(NULL)){

         HANDLE hClipboardData = GetClipboardData(CF_UNICODETEXT);
         char *pchData = (char*)GlobalLock(hClipboardData);
         strData = pchData;
         GlobalUnlock(hClipboardData);
         CloseClipboard();

    }
    return strData;
}

设置文字:

bool setClipboard(CStringA textToclipboard)
{
    bool success = true;

    if (OpenClipboard(NULL)){

        EmptyClipboard();
        HGLOBAL hClipboardData;
        size_t size = (textToclipboard.GetLength()+1) * sizeof(TCHAR);
        hClipboardData = GlobalAlloc(NULL, size);
        TCHAR* pchData = (TCHAR*)GlobalLock(hClipboardData);
        memcpy(pchData, LPCTSTR(textToclipboard.GetString()), size);
        SetClipboardData(CF_UNICODETEXT, hClipboardData);
        GlobalUnlock(hClipboardData);
        CloseClipboard();
    }

    return success;

}

只需获取并设置剪贴板内容.

CStringA str = getClipboard();
setClipboard(str);

Answer 1

CF_UNICODETEXT使用UTF-16.在Windows上,wchar_t数据元素用于UTF-16,但您的代码正在使用char. CStringA与UTF-16不兼容.您在两个函数中的数据不匹配,这就是您没有得到预期结果的原因.

一种解决方案是使用CStringW而不是CStringA:

CStringW getClipboard()
{
    CStringW strData;

    if (OpenClipboard(NULL))
    {
        HANDLE hClipboardData = GetClipboardData(CF_UNICODETEXT);
        if (hClipboardData)
        {
            WCHAR *pchData = (WCHAR*) GlobalLock(hClipboardData);
            if (pchData)
            {
                strData = pchData;
                GlobalUnlock(hClipboardData);
            }
        }
        CloseClipboard();
    }
    return strData;
}

bool setClipboard(CStringW textToclipboard)
{
    bool success = true;

    if (OpenClipboard(NULL))
    {
        EmptyClipboard();
        size_t size = (textToclipboard.GetLength()+1) * sizeof(WCHAR);
        HGLOBAL hClipboardData = GlobalAlloc(NULL, size);
        if (hClipboardData)
        {
            WCHAR* pchData = (WCHAR*) GlobalLock(hClipboardData);
            if (pchData)
            {
                memcpy(pchData, (WCHAR*) textToclipboard.GetString(), size);
                GlobalUnlock(hClipboardData);
                SetClipboardData(CF_UNICODETEXT, hClipboardData);
            }
        }
        CloseClipboard();
    }
    return success;
}

如果你需要坚持CStringA,那么:

1. 使用CF_TEXT而不是CF_UNICODETEXT让剪贴板为你处理Ansi和Unicode之间的转换:

   CStringA getClipboard()
   {
       CStringA strData;
   
       if (OpenClipboard(NULL))
       {
           HANDLE hClipboardData = GetClipboardData(CF_TEXT);
           if (hClipboardData)
           {
               CHAR *pchData = (CHAR*) GlobalLock(hClipboardData);
               if (pchData)
               {
                   strData = pchData;
                   GlobalUnlock(hClipboardData);
               }
           }
           CloseClipboard();
       }
       return strData;
   }
   
   bool setClipboard(CStringA textToclipboard)
   {
       bool success = true;
   
       if (OpenClipboard(NULL))
       {
           EmptyClipboard();
           size_t size = (textToclipboard.GetLength()+1) * sizeof(CHAR);
           HGLOBAL hClipboardData = GlobalAlloc(NULL, size);
           if (hClipboardData)
           {
               CHAR* pchData = (CHAR*) GlobalLock(hClipboardData);
               if (pchData)
               {
                   memcpy(pchData, (CHAR*) textToclipboard.GetString(), size);
                   GlobalUnlock(hClipboardData);
                   SetClipboardData(CF_TEXT, hClipboardData);
               }
           }
           CloseClipboard();
       }
       return success;
   }
   

2. 使用时手动转换为UTF-16 /从UTF-16转换CF_UNICODETEXT:

   CStringA getClipboard()
   {
       CStringW strData;
   
       if (OpenClipboard(NULL))
       {
           HANDLE hClipboardData = GetClipboardData(CF_UNICODETEXT);
           if (hClipboardData)
           {
               WCHAR *pchData = (WCHAR*) GlobalLock(hClipboardData);
               if (pchData)
               {
                   strData = pchData;
                   GlobalUnlock(hClipboardData);
               }
           }
           CloseClipboard();
       }
   
       return CStringA((WCHAR*)strData.GetString());
   }
   
   bool setClipboard(CStringA strData)
   {
       CStringW textToclipboard((CHAR*)strData.GetString());
       bool success = true;
   
       if (OpenClipboard(NULL))
       {
           EmptyClipboard();
           size_t size = (textToclipboard.GetLength()+1) * sizeof(WCHAR);
           HGLOBAL hClipboardData = GlobalAlloc(NULL, size);
           if (hClipboardData)
           {
               WCHAR* pchData = (WCHAR*) GlobalLock(hClipboardData);
               if (pchData)
               {
                   memcpy(pchData, (WCHAR*) textToclipboard.GetString(), size);
                   GlobalUnlock(hClipboardData);
                   SetClipboardData(CF_UNICODETEXT, hClipboardData);
               }
           }
           CloseClipboard();
       }
       return success;
   }
   

另一个解决方案是使用CString而不是使用CStringA或CStringW,然后使用CF_TEXT或CF_UNICODETEXT取决于TCHAR是Ansi还是Unicode:

#ifdef UNICODE
#define CF_TEXT_T CF_UNICODETEXT
#else
#define CF_TEXT_T CF_TEXT
#endif

CString getClipboard()
{
    CString strData;

    if (OpenClipboard(NULL))
    {
        HANDLE hClipboardData = GetClipboardData(CF_TEXT_T);
        if (hClipboardData)
        {
            TCHAR *pchData = (TCHAR*) GlobalLock(hClipboardData);
            if (pchData)
            {
                strData = pchData;
                GlobalUnlock(hClipboardData);
            }
        }
        CloseClipboard();
    }
    return strData;
}

bool setClipboard(CString textToclipboard)
{
    bool success = true;

    if (OpenClipboard(NULL))
    {
        EmptyClipboard();
        size_t size = (textToclipboard.GetLength()+1) * sizeof(TCHAR);
        HGLOBAL hClipboardData = GlobalAlloc(NULL, size);
        if (hClipboardData)
        {
            TCHAR* pchData = (TCHAR*) GlobalLock(hClipboardData);
            if (pchData)
            {
                memcpy(pchData, (TCHAR*) textToclipboard.GetString(), size);
                GlobalUnlock(hClipboardData);
                SetClipboardData(CF_TEXT_T, hClipboardData);
            }
        }
        CloseClipboard();
    }
    return success;
}

Answer 2

它们都是Unicode ......

但在Unicode中,更多的是一个字节代表一个字符.例如,可能有2个字节用于字符.因此:

当它是俄语时,字符串就像

                                                            '\0'
                                                            ----
0x04 0x3F 0x04 0x40 0x04 0x38 0x04 0x32 0x04 0x35 0x04 0x42 0x00 0x20
~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~
    ?         ?         ?        ?          ?         ?       space

它读到空间.

当它是英文时,字符串就像

'\0'
----
0x00 0x48 0x00 0x65 0x00 0x6C 0x00 0x6C 0x00 0x6F 0x00 0x20
~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~
   H          e         l        l          o       space

它什么都没读.(如果你先读,那是因为存储字节,LE或BE的顺序)

注意:也许我不精确选择单词(Unicode,UTF,...)