Requests the contents of the clipboard as rich text. When the rich
text is later received, @callback will be called.
The @text parameter to @callback will contain the resulting rich
text if the request succeeded, or %NULL if it failed. The @length
parameter will contain @text’s length. This function can fail for
various reasons, in particular if the clipboard was empty or if the
contents of the clipboard could not be converted into rich text form.
Requests the contents of the clipboard as rich text. When the rich text is later received, @callback will be called.
The @text parameter to @callback will contain the resulting rich text if the request succeeded, or %NULL if it failed. The @length parameter will contain @text’s length. This function can fail for various reasons, in particular if the clipboard was empty or if the contents of the clipboard could not be converted into rich text form.