;;; oni-company-init.el --- Company configuration    -*- lexical-binding: t; -*-

;; Copyright (C) 2018  Tom Willemse

;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: local

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; My configuration for `company-mode'.

;;; Code:

(require 'company)
(require 'company-dabbrev)
(require 'diminish)
(require 'fill-column-indicator)

(defvar-local oni-company-init--fci-used nil
  "Buffer-local indicator used to remember the state of `fci-mode'.
When `oni-company-init--hide-fill-column-indicator' actually
hides the fill column indicator this variable will be set to t.
`oni-company-init--show-fill-column-indicator' will only actually
show the fill column indicator if this variable is t.")

(defun oni-company-init--hide-fill-column-indicator (_)
  "Hide the fill column indicator if `fci-mode' is on."
  (when fci-mode
    (setq oni-company-init--fci-used t)
    (turn-off-fci-mode)))

(defun oni-company-init--show-fill-column-indicator (_)
  "Show the fill column indicator if `oni-company-init--fci-used' is t."
  (when oni-company-init--fci-used
    (setq oni-company-init--fci-used nil)
    (turn-on-fci-mode)))

(diminish 'company-mode)

(setq company-dabbrev-ignore-case nil)
(setq company-idle-delay 0.2)
(setq company-tooltip-align-annotations t)

(setq company-frontends
      '(company-pseudo-tooltip-unless-just-one-frontend
        company-echo-metadata-frontend
        company-preview-frontend))

;; Turn the fill column indicator off when the company mode pop-up
;; appears.
(add-hook 'company-completion-started-hook 'oni-company-init--hide-fill-column-indicator)

;; Turn the fill column indicator on when the company-mode pop-up
;; disappears (either because it is finished or because it was
;; cancelled).
(add-hook 'company-completion-finished-hook 'oni-company-init--show-fill-column-indicator)
(add-hook 'company-completion-cancelled-hook 'oni-company-init--show-fill-column-indicator)

(add-to-list 'company-backends 'company-tern)
(add-to-list 'company-backends 'company-jedi)

(provide 'oni-company-init)
;;; oni-company-init.el ends here