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;; geiser-company.el -- integration with company-mode
;; Copyright (C) 2009, 2010, 2011 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Mon Aug 24, 2009 12:44
(require 'geiser-autodoc)
(require 'geiser-completion)
(require 'geiser-edit)
(require 'geiser-base)
;;; Helpers:
(make-variable-buffer-local
(defvar geiser-company--enabled-flag nil))
(make-variable-buffer-local
(defvar geiser-company--autodoc-flag nil))
(make-variable-buffer-local
(defvar geiser-company--completions nil))
(defun geiser-company--candidates (prefix)
(and (equal prefix (car geiser-company--completions))
(cdr geiser-company--completions)))
(defun geiser-company--doc (id)
(ignore-errors
(let ((help (geiser-autodoc--autodoc `((,id 0)))))
(and help (substring-no-properties help)))))
(defsubst geiser-company--doc-buffer (id) nil)
(defun geiser-company--location (id)
(ignore-errors
(let ((id (make-symbol id)))
(condition-case nil
(geiser-edit-module id 'noselect)
(error (geiser-edit-symbol id 'noselect))))))
(defun geiser-company--prefix-at-point ()
(when geiser-company--enabled-flag
(if (nth 8 (syntax-ppss)) 'stop
(let* ((prefix (and (looking-at-p "\\_>")
(geiser-completion--prefix nil)))
(cmps1 (and prefix
(geiser-completion--complete prefix nil)))
(cmps2 (and prefix
(geiser-completion--complete prefix t)))
(mprefix (and (not cmps1) (not cmps2)
(geiser-completion--prefix t)))
(cmps3 (and mprefix (geiser-completion--complete mprefix t)))
(cmps (or cmps3 (append cmps1 cmps2)))
(prefix (or mprefix prefix)))
(setq geiser-company--completions (cons prefix cmps))
prefix))))
;;; Activation
(defun geiser-company--setup (enable)
(setq geiser-company--enabled-flag enable)
(when (fboundp 'geiser-company--setup-company)
(geiser-company--setup-company enable)))
(defun geiser-company--inhibit-autodoc (ignored)
(when (setq geiser-company--autodoc-flag geiser-autodoc-mode)
(geiser-autodoc-mode -1)))
(defun geiser-company--restore-autodoc (&optional ignored)
(when geiser-company--autodoc-flag
(geiser-autodoc-mode 1)))
;;; Company activation
(eval-after-load "company"
'(progn
(defun geiser-company-backend (command &optional arg &rest ignored)
"A `company-mode' completion back-end for `geiser-mode'."
(interactive (list 'interactive))
(case command
('interactive (company-begin-backend 'geiser-company-backend))
('prefix (geiser-company--prefix-at-point))
('candidates (geiser-company--candidates arg))
('meta (geiser-company--doc arg))
('doc-buffer (geiser-company--doc-buffer arg))
('location (geiser-company--location arg))
('sorted t)))
(defun geiser-company--setup-company (enable)
(set (make-local-variable 'company-default-lighter) "/C")
(set (make-local-variable 'company-echo-delay) 0.01)
(set (make-local-variable 'company-backends)
(and enable '(geiser-company-backend)))
(company-mode (if enable 1 -1)))
(add-hook 'company-completion-finished-hook
'geiser-company--restore-autodoc)
(add-hook 'company-completion-cancelled-hook
'geiser-company--restore-autodoc)
(add-hook 'company-completion-started-hook
'geiser-company--inhibit-autodoc)
(define-key company-active-map (kbd "M-`")
(lambda ()
(interactive)
(company-cancel)
(call-interactively 'geiser-completion--complete-module)))))
(provide 'geiser-company)
;;; geiser-company.el ends here
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