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spacemacs/layers/+lang/haskell/funcs.el
2021-04-04 19:00:40 +02:00

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;;; funcs.el --- Haskell Layer funcs File for Spacemacs
;;
;; Copyright (c) 2012-2021 Sylvain Benner & Contributors
;;
;; Author: Sylvain Benner <sylvain.benner@gmail.com>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;
;; 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 <http://www.gnu.org/licenses/>.
;; Completion setup functions
(defun spacemacs-haskell//setup-backend ()
"Conditionally setup haskell backend."
(pcase haskell-completion-backend
('lsp (spacemacs-haskell//setup-lsp))
('dante (spacemacs-haskell//setup-dante))))
(defun spacemacs-haskell//setup-company ()
"Conditionally setup haskell completion backend."
(when (eq haskell-completion-backend 'dante)
(spacemacs-haskell//setup-dante-company)))
;; LSP functions
(defun spacemacs-haskell//setup-lsp ()
"Setup lsp backend"
(if (configuration-layer/layer-used-p 'lsp)
(progn
;; The functionality we require from this is not an autoload, but rather some
;; top-level code that registers a LSP server type. So we need to load it
;; directly and can't rely on it being autoloaded.
(require 'lsp-haskell)
(lsp))
(message "`lsp' layer is not installed, please add `lsp' layer to your dotfile.")))
;; Dante functions
(defun spacemacs-haskell//setup-dante ()
(dante-mode)
(add-to-list 'spacemacs-jump-handlers 'xref-find-definitions))
(defun spacemacs-haskell//setup-dante-company ()
(spacemacs|add-company-backends
:backends (dante-company company-dabbrev-code company-yasnippet)
:modes haskell-mode))
(defun spacemacs-haskell//dante-insert-type ()
(interactive)
(dante-type-at :insert))
;; misc
(defun spacemacs-haskell//disable-electric-indent ()
"Disable electric indent mode if available"
;; use only internal indentation system from haskell
(if (fboundp 'electric-indent-local-mode)
(electric-indent-local-mode -1)))
(defun spacemacs/haskell-format-imports ()
"Sort and align import statements from anywhere in the source file."
(interactive)
(save-excursion
(haskell-navigate-imports)
(haskell-mode-format-imports)))