+
+(defalias 'exec-to-string 'shell-command-to-string)
+\f
+
+;; Buffer context
+
+(defun buffer-syntactic-context (&optional buffer)
+ "Syntactic context at point in BUFFER.
+Either of `string', `comment' or nil.
+This is an XEmacs compatibility function."
+ (with-current-buffer (or buffer (current-buffer))
+ (let ((state (syntax-ppss (point))))
+ (cond
+ ((nth 3 state) 'string)
+ ((nth 4 state) 'comment)))))
+
+
+(defun buffer-syntactic-context-depth (&optional buffer)
+ "Syntactic parenthesis depth at point in BUFFER.
+This is an XEmacs compatibility function."
+ (with-current-buffer (or buffer (current-buffer))
+ (nth 0 (syntax-ppss (point)))))
+
+
+;; Extents
+(defun make-extent (beg end &optional buffer)
+ (make-overlay beg end buffer))
+
+(defun extent-properties (extent) (overlay-properties extent))
+(unless (fboundp 'extent-property) (defalias 'extent-property 'overlay-get))
+
+(defun extent-at (pos &optional object property before)
+ (with-current-buffer (or object (current-buffer))
+ (let ((overlays (overlays-at pos)))
+ (when property
+ (let (filtered)
+ (while overlays
+ (if (overlay-get (car overlays) property)
+ (setq filtered (cons (car overlays) filtered)))
+ (setq overlays (cdr overlays)))
+ (setq overlays filtered)))
+ (setq overlays
+ (sort overlays
+ (function (lambda (o1 o2)
+ (let ((p1 (or (overlay-get o1 'priority) 0))
+ (p2 (or (overlay-get o2 'priority) 0)))
+ (or (> p1 p2)
+ (and (= p1 p2)
+ (> (overlay-start o1) (overlay-start o2)))))))))
+ (if before
+ (nth 1 (memq before overlays))
+ (car overlays)))))
+
+(defun set-extent-property (extent prop value)
+ ;; Make sure that separate adjacent extents
+ ;; with the same mouse-face value
+ ;; do not run together as one extent.
+ (and (eq prop 'mouse-face)
+ (symbolp value)
+ (setq value (list value)))
+ (if (eq prop 'duplicable)
+ (cond ((and value (not (overlay-get extent prop)))
+ ;; If becoming duplicable, copy all overlayprops to text props.
+ (add-text-properties (overlay-start extent)
+ (overlay-end extent)
+ (overlay-properties extent)
+ (overlay-buffer extent)))
+ ;; If becoming no longer duplicable, remove these text props.
+ ((and (not value) (overlay-get extent prop))
+ (remove-text-properties (overlay-start extent)
+ (overlay-end extent)
+ (overlay-properties extent)
+ (overlay-buffer extent))))
+ ;; If extent is already duplicable, put this property
+ ;; on the text as well as on the overlay.
+ (if (overlay-get extent 'duplicable)
+ (put-text-property (overlay-start extent)
+ (overlay-end extent)
+ prop value (overlay-buffer extent))))
+ (overlay-put extent prop value))
+
+(defun set-extent-face (extent face)
+ (set-extent-property extent 'face face))
+
+(defun set-extent-end-glyph (extent glyph)
+ (set-extent-property extent 'after-string glyph))
+
+(defun delete-extent (extent)
+ (set-extent-property extent 'duplicable nil)
+ (delete-overlay extent))