code.delx.au - gnu-emacs-elpa/blob - company-elisp.el

   1 (require 'company)
   2 (eval-when-compile (require 'cl))
   3
   4 (defvar company-lisp-symbol-regexp
   5   "\\_<\\(\\sw\\|\\s_\\)+\\_>\\=")
   6
   7 (defun company-grab-lisp-symbol ()
   8   (let ((prefix (or (company-grab company-lisp-symbol-regexp) "")))
   9     (unless (and (company-in-string-or-comment (- (point) (length prefix)))
  10                  (/= (char-before (- (point) (length prefix))) ?`))
  11       prefix)))
  12
  13 (defun company-elisp-predicate (symbol)
  14   (or (boundp symbol)
  15       (fboundp symbol)))
  16
  17 (defvar company-elisp-parse-limit 30)
  18 (defvar company-elisp-parse-depth 100)
  19
  20 (defun company-elisp-parse-let ()
  21   (let (vars)
  22     (ignore-errors
  23       (save-excursion
  24         (dotimes (i company-elisp-parse-depth)
  25           (up-list -1)
  26           (save-excursion
  27             (when (looking-at "([ \t\n]*let")
  28               (down-list 2)
  29               (ignore-errors
  30                 (dotimes (i company-elisp-parse-limit)
  31                   (save-excursion
  32                     (down-list 1)
  33                     (if (looking-at "[ \t\n]*\\(\\(?:\\sw\\|\\s_\\)+\\)")
  34                         (add-to-list 'vars (match-string-no-properties 1))
  35                       (error)))
  36                   (forward-sexp))))))))
  37     vars))
  38
  39 (defun company-elisp-doc (symbol)
  40   (let* ((symbol (intern symbol))
  41          (doc (if (fboundp symbol)
  42                   (documentation symbol t)
  43                 (documentation-property symbol 'variable-documentation t))))
  44     (when (string-match ".*$" doc)
  45       (match-string 0 doc))))
  46
  47 (defun company-elisp (command &optional arg &rest ignored)
  48   (case command
  49     ('prefix (and (eq major-mode 'emacs-lisp-mode)
  50                   (company-grab-lisp-symbol)))
  51     ('candidates (let ((completion-ignore-case nil))
  52                    (append (all-completions arg (company-elisp-parse-let))
  53                            (all-completions arg obarray
  54                                             'company-elisp-predicate))))
  55     ('meta (company-elisp-doc arg))
  56     ('doc-buffer (describe-function 'describe-function)
  57                  (help-buffer))))
  58
  59 (provide 'company-elisp)
  60 ;;; company-elisp.el ends here