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;;; geiser-company.el -- integration with company-mode
;; Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2016 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
;;; Code:
(require 'geiser-autodoc)
(require 'geiser-completion)
(require 'geiser-edit)
(require 'geiser-base)
(require 'geiser-doc)
(eval-when-compile (require 'cl-lib))
;;; Helpers:
(defvar-local geiser-company--enabled-flag nil)
(defvar-local geiser-company--autodoc-flag nil)
(defvar-local 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
(when (not (geiser-autodoc--inhibit))
(let ((help (geiser-autodoc--autodoc `((,id 0)) nil)))
(and help (substring-no-properties help))))))
(defun geiser-company--doc-buffer (id)
(let* ((impl geiser-impl--implementation)
(module (geiser-eval--get-module))
(symbol (make-symbol id))
(ds (geiser-doc--get-docstring symbol module)))
(if (or (not ds) (not (listp ds)))
(progn
(message "No documentation available for '%s'" symbol)
nil)
(with-current-buffer (get-buffer-create "*company-documentation*")
(geiser-doc--render-docstring ds symbol module impl)
(current-buffer)))))
(defun geiser-company--docstring (id)
(let* ((module (geiser-eval--get-module))
(symbol (make-symbol id))
(ds (geiser-doc--get-docstring symbol module)))
(and ds
(listp ds)
(concat (geiser-autodoc--str* (cdr (assoc "signature" ds)))
"\n\n"
(cdr (assoc "docstring" ds))))))
(defun geiser-company--location (id)
(ignore-errors
(when (not (geiser-autodoc--inhibit))
(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 ()
(ignore-errors
(when (and (not (geiser-autodoc--inhibit)) 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
(declare-function company-begin-backend "ext:company")
(declare-function company-cancel "ext:company")
(declare-function company-mode "ext:company")
(defvar company-backends)
(defvar company-active-map)
(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))
(cl-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))
('quickhelp-string (geiser-company--docstring arg))
('location (geiser-company--location arg))
('sorted t)))
(defun geiser-company--setup-company (enable)
(when enable
(set (make-local-variable 'company-backends)
(add-to-list 'company-backends '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)
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