elisp/geiser-base.el

   1 ;;; geiser-base.el --- shared bits
   2
   3 ;; Copyright (C) 2009, 2010, 2012, 2013, 2015  Jose Antonio Ortega Ruiz
   4
   5 ;; This program is free software; you can redistribute it and/or
   6 ;; modify it under the terms of the Modified BSD License. You should
   7 ;; have received a copy of the license along with this program. If
   8 ;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
   9
  10 \f
  11
  12 ;; Settings and vars shared by all geiser modules, including little
  13 ;; utilities and emacsen compatibility bits.
  14
  15 ;;; Emacs compatibility:
  16
  17 (require 'ring)
  18
  19 (eval-after-load "ring"
  20   '(when (not (fboundp 'ring-member))
  21      (defun ring-member (ring item)
  22        (catch 'found
  23          (dotimes (ind (ring-length ring) nil)
  24            (when (equal item (ring-ref ring ind))
  25              (throw 'found ind)))))))
  26
  27 (when (not (fboundp 'looking-at-p))
  28   (defsubst looking-at-p (regexp)
  29     (let ((inhibit-changing-match-data t))
  30       (looking-at regexp))))
  31
  32 \f
  33 ;;; Utilities:
  34
  35 (defsubst geiser--chomp (str)
  36   (if (string-match-p ".*\n$" str) (substring str 0 -1) str))
  37
  38 (defun geiser--shorten-str (str len &optional sep)
  39   (let ((str-len (length str)))
  40     (if (<= str-len len)
  41         str
  42       (let* ((sep (or sep " ... "))
  43              (sep-len (length sep))
  44              (prefix-len (/ (- str-len sep-len) 2))
  45              (prefix (substring str 0 prefix-len))
  46              (suffix (substring str (- str-len prefix-len))))
  47         (format "%s%s%s" prefix sep suffix)))))
  48
  49 (defun geiser--region-to-string (begin &optional end)
  50   (let ((end (or end (point))))
  51     (when (< begin end)
  52       (let* ((str (buffer-substring-no-properties begin end))
  53              (pieces (split-string str nil t)))
  54         (mapconcat 'identity pieces " ")))))
  55
  56 (defun geiser--insert-with-face (str face)
  57   (let ((p (point)))
  58     (insert str)
  59     (put-text-property p (point) 'face face)))
  60
  61
  62 (defmacro geiser--save-msg (&rest body)
  63   (let ((msg (make-symbol "msg")))
  64     `(let ((,msg (current-message)))
  65        ,@body
  66        (message ,msg))))
  67
  68 (put 'geiser--save-msg 'lisp-indent-function 0)
  69
  70 (defun geiser--del-dups (lst)
  71   (let (result)
  72     (dolist (e lst (nreverse result))
  73       (unless (member e result) (push e result)))))
  74
  75 (defsubst geiser--symbol-at-point ()
  76   (let ((thing (thing-at-point 'symbol)))
  77     (and thing (make-symbol thing))))
  78
  79 (defun geiser--cut-version (v)
  80   (when (string-match "\\([0-9]+\\.[0-9]\\(?:\\.[0-9]+\\)?\\).*" v)
  81     (match-string 1 v)))
  82
  83 (defun geiser--version< (v1 v2)
  84   (let ((v1 (geiser--cut-version v1))
  85         (v2 (geiser--cut-version v2)))
  86     (and v1 v2 (version< v1 v2))))
  87
  88 \f
  89 (provide 'geiser-base)