21.12 Minibuffer Contents
These functions access the minibuffer prompt and contents.
Function: minibuffer-prompt
This function returns the prompt string of the currently active minibuffer. If no minibuffer is active, it returns nil.
Function: minibuffer-prompt-end
This function returns the current position of the end of the minibuffer prompt, if a minibuffer is current. Otherwise, it returns the minimum valid buffer position.
Function: minibuffer-prompt-width
This function returns the current display-width of the minibuffer prompt, if a minibuffer is current. Otherwise, it returns zero.
Function: minibuffer-contents
This function returns the editable contents of the minibuffer (that is, everything except the prompt) as a string, if a minibuffer is current. Otherwise, it returns the entire contents of the current buffer.
Function: minibuffer-contents-no-properties
This is like minibuffer-contents, except that it does not copy text properties, just the characters themselves. See Text Properties.
Command: delete-minibuffer-contents
This command erases the editable contents of the minibuffer (that is, everything except the prompt), if a minibuffer is current. Otherwise, it erases the entire current buffer.