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;;; evil-collection-paren.el --- Bindings for `paren'. -*- lexical-binding: t -*-
;; Copyright (C) 2017 James Nguyen
;; Author: James Nguyen <james@jojojames.com>
;; Maintainer: James Nguyen <james@jojojames.com>
;; Pierre Neidhardt <ambrevar@gmail.com>
;; URL: https://github.com/emacs-evil/evil-collection
;; Version: 0.0.1
;; Package-Requires: ((emacs "25.1"))
;; Keywords: evil, emacs, tools
;; 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/>.
;;; Commentary:
;;; Bindings for `paren'.
;;; Code:
(require 'paren)
(require 'evil-collection)
(defun evil-collection-paren-show-paren-function (f &rest args)
"Integrate `show-paren-function' with `evil'."
(if (not (bound-and-true-p evil-mode))
(apply f args)
(if (if (memq 'not evil-highlight-closing-paren-at-point-states)
(memq evil-state evil-highlight-closing-paren-at-point-states)
(not (memq evil-state evil-highlight-closing-paren-at-point-states)))
(apply f args)
(let ((pos (point)) syntax narrow)
(setq pos
(catch 'end
(dotimes (var (1+ (* 2 evil-show-paren-range)))
(if (zerop (mod var 2))
(setq pos (+ pos var))
(setq pos (- pos var)))
(setq syntax (syntax-class (syntax-after pos)))
(cond
((eq syntax 4)
(setq narrow pos)
(throw 'end pos))
((eq syntax 5)
(throw 'end (1+ pos)))))))
(if pos
(save-excursion
(goto-char pos)
(save-restriction
(when narrow
(narrow-to-region narrow (point-max)))
(apply f args)))
;; prevent the preceding pair from being highlighted
(dolist (ov '(show-paren--overlay
show-paren--overlay-1
show-paren-overlay
show-paren-overlay-1))
(let ((ov (and (boundp ov) (symbol-value ov))))
(when (overlayp ov) (delete-overlay ov)))))))))
(defun evil-collection-paren-setup ()
"Set up `evil' bindings for `paren'."
(advice-add 'show-paren-function
:around 'evil-collection-paren-show-paren-function))
(provide 'evil-collection-paren)
;;; evil-collection-paren.el ends here
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