It does nothing if FORM is already on the list for FILE.
FILE must match exactly. Normally FILE is the name of a library,
with no directory or extension specified, since that is how `load'
-is normally called."
- ;; Make sure `load-history' contains the files dumped with Emacs
- ;; for the case that FILE is one of the files dumped with Emacs.
- (load-symbol-file-load-history)
- ;; Make sure there is an element for FILE.
- (or (assoc file after-load-alist)
- (setq after-load-alist (cons (list file) after-load-alist)))
- ;; Add FORM to the element if it isn't there.
+is normally called.
+FILE can also be a feature (i.e. a symbol), in which case FORM is
+evaluated whenever that feature is `provide'd."
(let ((elt (assoc file after-load-alist)))
- (or (member form (cdr elt))
- (progn
- (nconc elt (list form))
- ;; If the file has been loaded already, run FORM right away.
- (and (assoc file load-history)
- (eval form)))))
+ ;; Make sure there is an element for FILE.
+ (unless elt (setq elt (list file)) (push elt after-load-alist))
+ ;; Add FORM to the element if it isn't there.
+ (unless (member form (cdr elt))
+ (nconc elt (list form))
+ ;; If the file has been loaded already, run FORM right away.
+ (if (if (symbolp file)
+ (featurep file)
+ ;; Make sure `load-history' contains the files dumped with
+ ;; Emacs for the case that FILE is one of them.
+ (load-symbol-file-load-history)
+ (assoc file load-history))
+ (eval form))))
form)
(defun eval-next-after-load (file)
(if all (save-excursion (set-buffer (other-buffer))))
(set-buffer-modified-p (buffer-modified-p)))
-(defun momentary-string-display (string pos &optional exit-char message)
+(defun momentary-string-display (string pos &optional exit-char message)
"Momentarily display STRING in the buffer at POS.
Display remains until next character is typed.
If the char is EXIT-CHAR (optional third arg, default is SPC) it is swallowed;
(set-buffer-modified-p modified))))
\f
+;;;; Overlay operations
+
+(defun copy-overlay (o)
+ "Return a copy of overlay O."
+ (let ((o1 (make-overlay (overlay-start o) (overlay-end o)
+ ;; FIXME: there's no easy way to find the
+ ;; insertion-type of the two markers.
+ (overlay-buffer o)))
+ (props (overlay-properties o)))
+ (while props
+ (overlay-put o1 (pop props) (pop props)))
+ o1))
+
+(defun remove-overlays (beg end name val)
+ "Clear BEG and END of overlays whose property NAME has value VAL.
+Overlays might be moved and or split."
+ (if (< end beg)
+ (setq beg (prog1 end (setq end beg))))
+ (save-excursion
+ (dolist (o (overlays-in beg end))
+ (when (eq (overlay-get o name) val)
+ ;; Either push this overlay outside beg...end
+ ;; or split it to exclude beg...end
+ ;; or delete it entirely (if it is contained in beg...end).
+ (if (< (overlay-start o) beg)
+ (if (> (overlay-end o) end)
+ (progn
+ (move-overlay (copy-overlay o)
+ (overlay-start o) beg)
+ (move-overlay o end (overlay-end o)))
+ (move-overlay o (overlay-start o) beg))
+ (if (> (overlay-end o) end)
+ (move-overlay o end (overlay-end o))
+ (delete-overlay o)))))))
+
;;;; Miscellanea.
;; A number of major modes set this locally.
(defun functionp (object)
"Non-nil iff OBJECT is a type of object that can be called as a function."
- (or (and (symbolp object)
- (fboundp object)
+ (or (and (symbolp object) (fboundp object)
(setq object (indirect-function object))
(eq (car-safe object) 'autoload)
(not (car-safe (cdr-safe (cdr-safe (cdr-safe (cdr-safe object)))))))