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(font-lock-extend-region-function, font-lock-extend-region):

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Move from font-core.el.  Simplify.
This commit is contained in:
Stefan Monnier 2006-08-01 19:09:11 +00:00
parent 663e16604c
commit 2821e1b6f8
2 changed files with 37 additions and 0 deletions
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25
lisp/font-lock.el
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@ -975,6 +975,31 @@ The value of this variable is used when Font Lock mode is turned on."
;; directives correctly and cleanly. (It is the same problem as fontifying
;; multi-line strings and comments; regexps are not appropriate for the job.)
(defvar font-lock-extend-region-function nil
"A function that determines the region to fontify after a change.
This variable is either nil, or is a function that determines the
region to refontify after a change.
It is usually set by the major mode via `font-lock-defaults'.
Font-lock calls this function after each buffer change.
The function is given three parameters, the standard BEG, END, and OLD-LEN
from `after-change-functions'. It should return either a cons of the beginning
and end buffer positions \(in that order) of the region to fontify, or nil
\(which directs the caller to fontify a default region). This function
should preserve point and the match-data.
The region it returns may start or end in the middle of a line.")
(defun font-lock-extend-region (beg end old-len)
"Determine the region to fontify after a buffer change.
BEG END and OLD-LEN are the standard parameters from `after-change-functions'.
The return value is either nil \(which directs the caller to chose the region
itself), or a cons of the beginning and end \(in that order) of the region.
The region returned may start or end in the middle of a line."
(if font-lock-extend-region-function
(funcall font-lock-extend-region-function beg end old-len)))
(defun font-lock-fontify-buffer ()
"Fontify the current buffer the way the function `font-lock-mode' would."
(interactive)