elisp/geiser-company.el

   1 ;; geiser-company.el -- integration with company-mode
   2
   3 ;; Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 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 (require 'geiser-doc)
  19
  20 (eval-when-compile (require 'cl))
  21
  22 \f
  23 ;;; Helpers:
  24
  25 (make-variable-buffer-local
  26  (defvar geiser-company--enabled-flag nil))
  27
  28 (make-variable-buffer-local
  29  (defvar geiser-company--autodoc-flag nil))
  30
  31 (make-variable-buffer-local
  32  (defvar geiser-company--completions nil))
  33
  34 (defun geiser-company--candidates (prefix)
  35   (and (equal prefix (car geiser-company--completions))
  36        (cdr geiser-company--completions)))
  37
  38 (defun geiser-company--doc (id)
  39   (ignore-errors
  40     (when (not (geiser-autodoc--inhibit))
  41       (let ((help (geiser-autodoc--autodoc `((,id 0)))))
  42         (and help (substring-no-properties help))))))
  43
  44 (defun geiser-company--doc-buffer (id)
  45   (let* ((impl geiser-impl--implementation)
  46          (module (geiser-doc-module (geiser-eval--get-module) impl))
  47          (symbol (make-symbol id))
  48          (ds (geiser-doc--get-docstring symbol module)))
  49     (if (or (not ds) (not (listp ds)))
  50         (message "No documentation available for '%s'" symbol)
  51       (with-current-buffer (get-buffer-create "*company-documentation*")
  52         (geiser-doc--render-docstring ds symbol module impl)
  53         (current-buffer)))))
  54
  55 (defun geiser-company--location (id)
  56   (ignore-errors
  57     (when (not (geiser-autodoc--inhibit))
  58       (let ((id (make-symbol id)))
  59         (condition-case nil
  60             (geiser-edit-module id 'noselect)
  61           (error (geiser-edit-symbol id 'noselect)))))))
  62
  63 (defun geiser-company--prefix-at-point ()
  64   (when (and (not (geiser-autodoc--inhibit)) geiser-company--enabled-flag)
  65     (if (nth 8 (syntax-ppss)) 'stop
  66       (let* ((prefix (and (looking-at-p "\\_>")
  67                           (geiser-completion--prefix nil)))
  68              (cmps1 (and prefix
  69                          (geiser-completion--complete prefix nil)))
  70              (cmps2 (and prefix
  71                          (geiser-completion--complete prefix t)))
  72              (mprefix (and (not cmps1) (not cmps2)
  73                            (geiser-completion--prefix t)))
  74              (cmps3 (and mprefix (geiser-completion--complete mprefix t)))
  75              (cmps (or cmps3 (append cmps1 cmps2)))
  76              (prefix (or mprefix prefix)))
  77         (setq geiser-company--completions (cons prefix cmps))
  78         prefix))))
  79
  80 \f
  81 ;;; Activation
  82
  83 (defun geiser-company--setup (enable)
  84   (setq geiser-company--enabled-flag enable)
  85   (when (fboundp 'geiser-company--setup-company)
  86     (geiser-company--setup-company enable)))
  87
  88 (defun geiser-company--inhibit-autodoc (ignored)
  89   (when (setq geiser-company--autodoc-flag geiser-autodoc-mode)
  90     (geiser-autodoc-mode -1)))
  91
  92 (defun geiser-company--restore-autodoc (&optional ignored)
  93   (when geiser-company--autodoc-flag
  94     (geiser-autodoc-mode 1)))
  95
  96 \f
  97 ;;; Company activation
  98
  99 (eval-after-load "company"
 100   '(progn
 101      (defun geiser-company-backend (command &optional arg &rest ignored)
 102        "A `company-mode' completion back-end for `geiser-mode'."
 103        (interactive (list 'interactive))
 104        (case command
 105          ('interactive (company-begin-backend 'geiser-company-backend))
 106          ('prefix (geiser-company--prefix-at-point))
 107          ('candidates (geiser-company--candidates arg))
 108          ('meta (geiser-company--doc arg))
 109          ('doc-buffer (geiser-company--doc-buffer arg))
 110          ('location (geiser-company--location arg))
 111          ('sorted t)))
 112      (defun geiser-company--setup-company (enable)
 113        (set (make-local-variable 'company-default-lighter) "/C")
 114        (set (make-local-variable 'company-echo-delay) 0.01)
 115        (set (make-local-variable 'company-backends)
 116             (and enable '(geiser-company-backend)))
 117        (company-mode (if enable 1 -1)))
 118      (add-hook 'company-completion-finished-hook
 119                'geiser-company--restore-autodoc)
 120      (add-hook 'company-completion-cancelled-hook
 121                'geiser-company--restore-autodoc)
 122      (add-hook 'company-completion-started-hook
 123                'geiser-company--inhibit-autodoc)
 124      (define-key company-active-map (kbd "M-`")
 125        (lambda ()
 126          (interactive)
 127          (company-cancel)
 128          (call-interactively 'geiser-completion--complete-module)))))
 129
 130
 131 \f
 132 (provide 'geiser-company)