/// <summary>
/// Adds text.
/// Returns this.
/// </summary>
/// <param name="text">Text.</param>
/// <param name="format">
/// Clipboard format id. Default: <see cref="ClipFormats.Text"/> (CF_UNICODETEXT).
/// Text encoding (UTF-16, ANSI, etc) depends on format; default UTF-16. See <see cref="ClipFormats.Register"/>.
/// </param>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentException">Invalid format.</exception>
/// <exception cref="Exception">Exceptions of <see cref="Encoding.GetBytes(string)"/>, which is called if encoding is not UTF-16.</exception>
public AClipboardData AddText(string text, int format = ClipFormats.Text)
{
Encoding enc = ClipFormats.GetTextEncoding_(format, out bool unknown);
if (enc == null)
{
return(_Add(text, format == 0 ? Api.CF_UNICODETEXT : format));
}
return(_Add(enc.GetBytes(text + "\0"), format));
}
/// <summary>
/// Gets clipboard text without open/close.
/// If format is 0, tries CF_UNICODETEXT and CF_HDROP.
/// </summary>
internal static unsafe string GetText_(int format)
{
IntPtr h = default;
if (format == 0)
{
h = Api.GetClipboardData(Api.CF_UNICODETEXT);
if (h == default)
{
format = Api.CF_HDROP;
}
}
if (format == 0)
{
format = Api.CF_UNICODETEXT;
}
else
{
h = Api.GetClipboardData(format); if (h == default)
{
return(null);
}
if (format == Api.CF_HDROP)
{
return(string.Join("\r\n", _HdropToFiles(h)));
}
}
using (new _GlobalLock(h, out var mem, out int len)) {
if (mem == default)
{
return(null);
}
var s = (char *)mem; var b = (byte *)s;
Encoding enc = ClipFormats.GetTextEncoding_(format, out bool unknown);
if (unknown)
{
if ((len & 1) != 0 || Util.BytePtr_.Length(b, len) > len - 2)
{
enc = Encoding.Default; //autodetect
}
}
if (enc == null)
{
len /= 2; while (len > 0 && s[len - 1] == '\0')
{
len--;
}
return(new string(s, 0, len));
}
else
{
//most apps add single '\0' at the end. Some don't add. Some add many, eg Dreamweaver. Trim all.
int charLen = enc.GetByteCount("\0");
switch (charLen)
{
case 1:
while (len > 0 && b[len - 1] == '\0')
{
len--;
}
break;
case 2:
for (int k = len / 2; k > 0 && s[k - 1] == '\0'; k--)
{
len -= 2;
}
break;
case 4:
var ip = (int *)s; for (int k = len / 4; k > 0 && ip[k - 1] == '\0'; k--)
{
len -= 4;
}
break;
}
return(enc.GetString(b, len));
//note: don't parse HTML format here. Let caller use GetHtml or parse itself.
}
}
}