elisp/geiser-company.el

   1 ;; geiser-company.el -- integration with company-mode
   2
   3 ;; Copyright (C) 2009, 2010, 2011, 2012 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 ;; Start date: Mon Aug 24, 2009 12:44
  11
  12 \f
  13
  14 (require 'geiser-autodoc)
  15 (require 'geiser-completion)
  16 (require 'geiser-edit)
  17 (require 'geiser-base)
  18
  19 \f
  20 ;;; Helpers:
  21
  22 (make-variable-buffer-local
  23  (defvar geiser-company--enabled-flag nil))
  24
  25 (make-variable-buffer-local
  26  (defvar geiser-company--autodoc-flag nil))
  27
  28 (make-variable-buffer-local
  29  (defvar geiser-company--completions nil))
  30
  31 (defun geiser-company--candidates (prefix)
  32   (and (equal prefix (car geiser-company--completions))
  33        (cdr geiser-company--completions)))
  34
  35 (defun geiser-company--doc (id)
  36   (ignore-errors
  37     (let ((help (geiser-autodoc--autodoc `((,id 0)))))
  38       (and help (substring-no-properties help)))))
  39
  40 (defsubst geiser-company--doc-buffer (id) nil)
  41
  42 (defun geiser-company--location (id)
  43   (ignore-errors
  44     (let ((id (make-symbol id)))
  45       (condition-case nil
  46           (geiser-edit-module id 'noselect)
  47         (error (geiser-edit-symbol id 'noselect))))))
  48
  49 (defun geiser-company--prefix-at-point ()
  50   (when geiser-company--enabled-flag
  51     (if (nth 8 (syntax-ppss)) 'stop
  52       (let* ((prefix (and (looking-at-p "\\_>")
  53                           (geiser-completion--prefix nil)))
  54              (cmps1 (and prefix
  55                          (geiser-completion--complete prefix nil)))
  56              (cmps2 (and prefix
  57                          (geiser-completion--complete prefix t)))
  58              (mprefix (and (not cmps1) (not cmps2)
  59                            (geiser-completion--prefix t)))
  60              (cmps3 (and mprefix (geiser-completion--complete mprefix t)))
  61              (cmps (or cmps3 (append cmps1 cmps2)))
  62              (prefix (or mprefix prefix)))
  63         (setq geiser-company--completions (cons prefix cmps))
  64         prefix))))
  65
  66 \f
  67 ;;; Activation
  68
  69 (defun geiser-company--setup (enable)
  70   (setq geiser-company--enabled-flag enable)
  71   (when (fboundp 'geiser-company--setup-company)
  72     (geiser-company--setup-company enable)))
  73
  74 (defun geiser-company--inhibit-autodoc (ignored)
  75   (when (setq geiser-company--autodoc-flag geiser-autodoc-mode)
  76     (geiser-autodoc-mode -1)))
  77
  78 (defun geiser-company--restore-autodoc (&optional ignored)
  79   (when geiser-company--autodoc-flag
  80     (geiser-autodoc-mode 1)))
  81
  82 \f
  83 ;;; Company activation
  84
  85 (eval-after-load "company"
  86   '(progn
  87      (defun geiser-company-backend (command &optional arg &rest ignored)
  88        "A `company-mode' completion back-end for `geiser-mode'."
  89        (interactive (list 'interactive))
  90        (case command
  91          ('interactive (company-begin-backend 'geiser-company-backend))
  92          ('prefix (geiser-company--prefix-at-point))
  93          ('candidates (geiser-company--candidates arg))
  94          ('meta (geiser-company--doc arg))
  95          ('doc-buffer (geiser-company--doc-buffer arg))
  96          ('location (geiser-company--location arg))
  97          ('sorted t)))
  98      (defun geiser-company--setup-company (enable)
  99        (set (make-local-variable 'company-default-lighter) "/C")
 100        (set (make-local-variable 'company-echo-delay) 0.01)
 101        (set (make-local-variable 'company-backends)
 102             (and enable '(geiser-company-backend)))
 103        (company-mode (if enable 1 -1)))
 104      (add-hook 'company-completion-finished-hook
 105                'geiser-company--restore-autodoc)
 106      (add-hook 'company-completion-cancelled-hook
 107                'geiser-company--restore-autodoc)
 108      (add-hook 'company-completion-started-hook
 109                'geiser-company--inhibit-autodoc)
 110      (define-key company-active-map (kbd "M-`")
 111        (lambda ()
 112          (interactive)
 113          (company-cancel)
 114          (call-interactively 'geiser-completion--complete-module)))))
 115
 116
 117 \f
 118 (provide 'geiser-company)