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;;; geiser-base.el --- shared bits
;; Copyright (C) 2009, 2010, 2012, 2013, 2015, 2016 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Settings and vars shared by all geiser modules, including little
;; utilities and emacsen compatibility bits.
;;; Emacs compatibility:
(require 'ring)
(eval-after-load "ring"
'(when (not (fboundp 'ring-member))
(defun ring-member (ring item)
(catch 'found
(dotimes (ind (ring-length ring) nil)
(when (equal item (ring-ref ring ind))
(throw 'found ind)))))))
(when (not (fboundp 'looking-at-p))
(defsubst looking-at-p (regexp)
(let ((inhibit-changing-match-data t))
(looking-at regexp))))
(when (not (fboundp 'font-lock-ensure))
(defun font-lock-ensure (&optional beg end)
(with-no-warnings (font-lock-fontify-region (or beg (point-min))
(or end (point-max))))))
(when (not (fboundp 'font-lock-flush))
(defun font-lock-flush (&optional beg end)))
;;; Utilities:
(defsubst geiser--chomp (str)
(if (string-match-p ".*\n$" str) (substring str 0 -1) str))
(defun geiser--shorten-str (str len &optional sep)
(let ((str-len (length str)))
(if (<= str-len len)
str
(let* ((sep (or sep " ... "))
(sep-len (length sep))
(prefix-len (/ (- str-len sep-len) 2))
(prefix (substring str 0 prefix-len))
(suffix (substring str (- str-len prefix-len))))
(format "%s%s%s" prefix sep suffix)))))
(defun geiser--region-to-string (begin &optional end)
(let ((end (or end (point))))
(when (< begin end)
(let* ((str (buffer-substring-no-properties begin end))
(pieces (split-string str nil t)))
(mapconcat 'identity pieces " ")))))
(defun geiser--insert-with-face (str face)
(let ((p (point)))
(insert str)
(put-text-property p (point) 'face face)))
(defmacro geiser--save-msg (&rest body)
(let ((msg (make-symbol "msg")))
`(let ((,msg (current-message)))
,@body
(message ,msg))))
(put 'geiser--save-msg 'lisp-indent-function 0)
(defun geiser--del-dups (lst)
(let (result)
(dolist (e lst (nreverse result))
(unless (member e result) (push e result)))))
(defsubst geiser--symbol-at-point ()
(let ((thing (thing-at-point 'symbol)))
(and thing (make-symbol thing))))
(defun geiser--cut-version (v)
(when (string-match "\\([0-9]+\\(?:\\.[0-9]+\\)*\\).*" v)
(match-string 1 v)))
(defun geiser--version< (v1 v2)
(let ((v1 (geiser--cut-version v1))
(v2 (geiser--cut-version v2)))
(and v1 v2 (version< v1 v2))))
(provide 'geiser-base)
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