elisp/geiser-company.el

   1 ;; geiser-company.el -- integration with company-mode
   2
   3 ;; Copyright (C) 2009, 2010, 2011, 2012, 2013 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 (eval-when-compile (require 'cl))
  20
  21 \f
  22 ;;; Helpers:
  23
  24 (make-variable-buffer-local
  25  (defvar geiser-company--enabled-flag nil))
  26
  27 (make-variable-buffer-local
  28  (defvar geiser-company--autodoc-flag nil))
  29
  30 (make-variable-buffer-local
  31  (defvar geiser-company--completions nil))
  32
  33 (defun geiser-company--candidates (prefix)
  34   (and (equal prefix (car geiser-company--completions))
  35        (cdr geiser-company--completions)))
  36
  37 (defun geiser-company--doc (id)
  38   (ignore-errors
  39     (when (not (geiser-autodoc--inhibit))
  40       (let ((help (geiser-autodoc--autodoc `((,id 0)))))
  41         (and help (substring-no-properties help))))))
  42
  43 (defsubst geiser-company--doc-buffer (id) nil)
  44
  45 (defun geiser-company--location (id)
  46   (ignore-errors
  47     (when (not (geiser-autodoc--inhibit))
  48       (let ((id (make-symbol id)))
  49         (condition-case nil
  50             (geiser-edit-module id 'noselect)
  51           (error (geiser-edit-symbol id 'noselect)))))))
  52
  53 (defun geiser-company--prefix-at-point ()
  54   (when (and (not (geiser-autodoc--inhibit)) geiser-company--enabled-flag)
  55     (if (nth 8 (syntax-ppss)) 'stop
  56       (let* ((prefix (and (looking-at-p "\\_>")
  57                           (geiser-completion--prefix nil)))
  58              (cmps1 (and prefix
  59                          (geiser-completion--complete prefix nil)))
  60              (cmps2 (and prefix
  61                          (geiser-completion--complete prefix t)))
  62              (mprefix (and (not cmps1) (not cmps2)
  63                            (geiser-completion--prefix t)))
  64              (cmps3 (and mprefix (geiser-completion--complete mprefix t)))
  65              (cmps (or cmps3 (append cmps1 cmps2)))
  66              (prefix (or mprefix prefix)))
  67         (setq geiser-company--completions (cons prefix cmps))
  68         prefix))))
  69
  70 \f
  71 ;;; Activation
  72
  73 (defun geiser-company--setup (enable)
  74   (setq geiser-company--enabled-flag enable)
  75   (when (fboundp 'geiser-company--setup-company)
  76     (geiser-company--setup-company enable)))
  77
  78 (defun geiser-company--inhibit-autodoc (ignored)
  79   (when (setq geiser-company--autodoc-flag geiser-autodoc-mode)
  80     (geiser-autodoc-mode -1)))
  81
  82 (defun geiser-company--restore-autodoc (&optional ignored)
  83   (when geiser-company--autodoc-flag
  84     (geiser-autodoc-mode 1)))
  85
  86 \f
  87 ;;; Company activation
  88
  89 (eval-after-load "company"
  90   '(progn
  91      (defun geiser-company-backend (command &optional arg &rest ignored)
  92        "A `company-mode' completion back-end for `geiser-mode'."
  93        (interactive (list 'interactive))
  94        (case command
  95          ('interactive (company-begin-backend 'geiser-company-backend))
  96          ('prefix (geiser-company--prefix-at-point))
  97          ('candidates (geiser-company--candidates arg))
  98          ('meta (geiser-company--doc arg))
  99          ('doc-buffer (geiser-company--doc-buffer arg))
 100          ('location (geiser-company--location arg))
 101          ('sorted t)))
 102      (defun geiser-company--setup-company (enable)
 103        (set (make-local-variable 'company-default-lighter) "/C")
 104        (set (make-local-variable 'company-echo-delay) 0.01)
 105        (set (make-local-variable 'company-backends)
 106             (and enable '(geiser-company-backend)))
 107        (company-mode (if enable 1 -1)))
 108      (add-hook 'company-completion-finished-hook
 109                'geiser-company--restore-autodoc)
 110      (add-hook 'company-completion-cancelled-hook
 111                'geiser-company--restore-autodoc)
 112      (add-hook 'company-completion-started-hook
 113                'geiser-company--inhibit-autodoc)
 114      (define-key company-active-map (kbd "M-`")
 115        (lambda ()
 116          (interactive)
 117          (company-cancel)
 118          (call-interactively 'geiser-completion--complete-module)))))
 119
 120
 121 \f
 122 (provide 'geiser-company)