next redisplay cycle, avoiding excessive fontification when many
buffer modifications are performed or a buffer is reverted.")
-(defvar font-lock-pending-extent-table (make-hash-table :weakness 'key))
+;; list of buffers in which there is a pending change.
+(defvar font-lock-pending-buffer-table (make-hash-table :weakness 'key))
+;; table used to keep track of ranges needing fontification.
(defvar font-lock-range-table (make-range-table))
(defun font-lock-pre-idle-hook ()
(condition-case font-lock-error
- (if (> (hash-table-count font-lock-pending-extent-table) 0)
+ (if (> (hash-table-count font-lock-pending-buffer-table) 0)
(font-lock-fontify-pending-extents))
(error (warn "Error caught in `font-lock-pre-idle-hook': %s"
font-lock-error))))
(defun font-lock-after-change-function (beg end old-len)
(when font-lock-mode
- (let ((ex (make-extent beg end)))
- (set-extent-property ex 'detachable nil)
- (set-extent-property ex 'end-open nil)
- (let ((exs (gethash (current-buffer) font-lock-pending-extent-table)))
- (push ex exs)
- (puthash (current-buffer) exs font-lock-pending-extent-table)))
+ ;; treat deletions as if the following character (or previous, if
+ ;; there is no following) were inserted. this is a bit of a hack
+ ;; but allows us to use text properties for everything.
+ (if (= beg end)
+ (cond ((/= end (point-max)) (setq end (1+ end)))
+ ((/= beg (point-min)) (setq beg (1- beg)))
+ (t nil)))
+ (put-text-property beg end 'font-lock-pending t)
+ (puthash (current-buffer) t font-lock-pending-buffer-table)
(if font-lock-always-fontify-immediately
(font-lock-fontify-pending-extents))))
;; only one buffer and one contiguous region!
(save-match-data
(maphash
- #'(lambda (buffer exs)
+ #'(lambda (buffer dummy)
;; remove first, to avoid infinite reprocessing if error
- (remhash buffer font-lock-pending-extent-table)
+ (remhash buffer font-lock-pending-buffer-table)
(when (buffer-live-p buffer)
(clear-range-table font-lock-range-table)
(with-current-buffer buffer
(save-excursion
(save-restriction
- ;; if we don't widen, then the C code will fail to
- ;; realize that we're inside a comment.
+ ;; if we don't widen, then the C code in
+ ;; syntactically-sectionize will fail to realize that
+ ;; we're inside a comment. #### We don't actually use
+ ;; syntactically-sectionize any more. Do we still
+ ;; need the widen?
(widen)
(let ((zmacs-region-stays
zmacs-region-stays)) ; protect from change!
- (mapc
- #'(lambda (ex)
- ;; paranoia.
- (when (and (extent-live-p ex)
- (not (extent-detached-p ex)))
- ;; first expand the ranges to full lines, because
- ;; that is what will be fontified; then use a
- ;; range table to merge the ranges.
- (let* ((beg (extent-start-position ex))
- (end (extent-end-position ex))
- (beg (progn (goto-char beg)
- (beginning-of-line)
- (point)))
- (end (progn (goto-char end)
- (forward-line 1)
- (point))))
- (detach-extent ex)
- (put-range-table beg end t
- font-lock-range-table))))
- exs)
+ (map-extents
+ #'(lambda (ex dummy-maparg)
+ ;; first expand the ranges to full lines,
+ ;; because that is what will be fontified;
+ ;; then use a range table to merge the
+ ;; ranges. (we could also do this simply using
+ ;; text properties. the range table code was
+ ;; here from a previous version of this code
+ ;; and works just as well.)
+ (let* ((beg (extent-start-position ex))
+ (end (extent-end-position ex))
+ (beg (progn (goto-char beg)
+ (beginning-of-line)
+ (point)))
+ (end (progn (goto-char end)
+ (forward-line 1)
+ (point))))
+ (put-range-table beg end t
+ font-lock-range-table)))
+ nil nil nil nil nil 'font-lock-pending t)
+ ;; clear all pending extents first in case of error below.
+ (put-text-property (point-min) (point-max)
+ 'font-lock-pending nil)
(map-range-table
#'(lambda (beg end val)
- ;; Maybe flush the internal cache used by
- ;; syntactically-sectionize. (It'd be nice if this
- ;; was more automatic.) Any deletions mean the
- ;; cache is invalid, and insertions at beginning or
- ;; end of line mean that the bol cache might be
- ;; invalid.
- ;; #### This code has been commented out for some time
- ;; now and is bit-rotting. Someone should look into
- ;; this.
-;; (if (or change-was-deletion (bobp)
-;; (= (preceding-char) ?\n))
-;; (buffer-syntactic-context-flush-cache))
- ;; #### This creates some unnecessary progress gauges.
+ ;; This creates some unnecessary progress gauges.
;; (if (and (= beg (point-min))
;; (= end (point-max)))
;; (font-lock-fontify-buffer)
;; (font-lock-fontify-region beg end)))
(font-lock-fontify-region beg end))
font-lock-range-table)))))))
- font-lock-pending-extent-table)))
+ font-lock-pending-buffer-table)))
\f
;; Syntactic fontification functions.
projects / chise / xemacs-chise.git.1 / blobdiff