This section describes additional variables that a major mode can
set by means of other-vars in
(see Font Lock Basics).
If this variable is non-
nil, it should be a function that is
called with no arguments, to choose an enclosing range of text for
refontification for the command M-o M-o
The function should report its choice by placing the region around it.
A good choice is a range of text large enough to give proper results,
but not too large so that refontification becomes slow. Typical values
mark-defun for programming modes or
This variable specifies additional properties (other than
font-lock-face) that are being managed by Font Lock mode. It
is used by
font-lock-default-unfontify-region, which normally
only manages the
font-lock-face property. If you want Font
Lock to manage other properties as well, you must specify them in a
font-lock-keywords as well as add them to
this list. See Search-based Fontification.
Function to use for fontifying the buffer. The default value is
Function to use for unfontifying the buffer. This is used when
turning off Font Lock mode. The default value is
Function to use for fontifying a region. It should take two
arguments, the beginning and end of the region, and an optional third
argument verbose. If verbose is non-
function should print status messages. The default value is
Function to use for unfontifying a region. It should take two
arguments, the beginning and end of the region. The default value is
Function to use for declaring that a region’s fontification is out of
date. It takes two arguments, the beginning and end of the region.
The default value of this variable is
Function to use for making sure a region of the current buffer has
been fontified. It is called with two arguments, the beginning and
end of the region. The default value of this variable is a function
font-lock-default-fontify-buffer if the buffer is
not fontified; the effect is to make sure the entire accessible
portion of the buffer is fontified.
This function tells Font Lock mode to run the Lisp function function any time it has to fontify or refontify part of the current buffer. It calls function before calling the default fontification functions, and gives it two arguments, start and end, which specify the region to be fontified or refontified.
The optional argument contextual, if non-
nil, forces Font
Lock mode to always refontify a syntactically relevant part of the
buffer, and not just the modified lines. This argument can usually be
When Font Lock is activated in a buffer, it calls this function with a
nil value of contextual if the value of
font-lock-keywords-only (see Syntactic Font Lock) is
If function was previously registered as a fontification
jit-lock-register, this function unregisters it.