133 lines
4.7 KiB
EmacsLisp
133 lines
4.7 KiB
EmacsLisp
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;;; evil-text-objects-haskell.el --- Text objects for Haskell source code
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;; Package-Version: 20180316.1833
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;;; License:
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;; Copyright (C) 2018 Off Market Data, Inc. DBA Urbint
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;; Permission is hereby granted, free of charge, to any person obtaining a copy
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;; of this software and associated documentation files (the "Software"), to
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;; deal in the Software without restriction, including without limitation the
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;; rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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;; sell copies of the Software, and to permit persons to whom the Software is
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;; furnished to do so, subject to the following conditions:
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;;
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;; The above copyright notice and this permission notice shall be included in
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;; all copies or substantial portions of the Software.
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;;
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;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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;; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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;; IN THE SOFTWARE.
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;;; Commentary:
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;; evil-text-objects-haskell provides text-object definitions that
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;; should make working with Haskell in Emacs more enjoyable.
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;;
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;; Currently supporting:
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;; - functions
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;; - multi-line comments
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;;
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;; See the README.md for installation instructions.
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(require 'evil)
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(require 'pcre2el)
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(require 'dash)
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(require 'bind-key)
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;;; Code:
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;; Helper Functions
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(defun string-symbol-at-point ()
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"Return a string version of the symbol at point after stripping away
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after all of the text properties."
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(->
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(symbol-at-point)
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symbol-name
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substring-no-properties))
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;; multi-line comments
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(evil-define-text-object
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evil-inner-haskell-comment-block (count &optional beg end type)
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"Inner text object for a Haskell comment block."
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(let ((beg (save-excursion
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(search-backward "{-")
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(right-char 2)
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(point)))
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(end (save-excursion
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(search-forward "-}")
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(left-char 2)
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(point))))
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(evil-range beg end type)))
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(evil-define-text-object
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evil-outer-haskell-comment-block (count &optional beg end type)
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"Outer text object for a Haskell comment block."
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(let ((beg (save-excursion
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(search-backward "{-")
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(point)))
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(end (save-excursion
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(search-forward "-}")
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(point))))
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(evil-range beg end type)))
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;; functions
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(evil-define-text-object
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evil-inner-haskell-function (count &optional beg end type)
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"Inner text object for a Haskell function."
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(evil-range 0 0 type))
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(evil-define-text-object
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evil-outer-haskell-function (count &optional beg end type)
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"Outer text object for a Haskell function."
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(beginning-of-line)
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(when (looking-at "--")
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(while (looking-at "--")
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(forward-line -1)))
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(when (looking-at "[[:space:]]")
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(while (looking-at "[[:space:]]")
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(forward-line -1)))
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(let* ((fn-name (save-excursion
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(search-backward-regexp "^\\w")
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(string-symbol-at-point)))
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(fn-name-regexp (concat "^" fn-name "\\b"))
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(end (save-excursion
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(while (search-forward-regexp fn-name-regexp nil t))
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(unless (search-forward-regexp "^\\w" nil t)
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(goto-char (point-max)))
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(search-backward-regexp "^[[:space:]]+[^ ]")
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(end-of-line)
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(point)))
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(beg (save-excursion
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(goto-char end)
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(while (search-backward-regexp fn-name-regexp nil t))
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(beginning-of-line)
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(forward-line -1)
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(while (looking-at "--")
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(forward-line -1))
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(point))))
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(evil-range beg end type)))
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;; Installation Helper
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(defun evil-text-objects-haskell/install ()
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"Register keybindings for the text objects defined herein. It is
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recommended to run this after something like `haskell-mode-hook'. See
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README.md for additional information."
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(bind-keys :map evil-operator-state-local-map
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("af" . evil-outer-haskell-function)
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("if" . evil-inner-haskell-function)
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("iC" . evil-inner-haskell-comment-block)
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("aC" . evil-outer-haskell-comment-block))
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(bind-keys :map evil-visual-state-local-map
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("af" . evil-outer-haskell-function)
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("if" . evil-inner-haskell-function)
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("iC" . evil-inner-haskell-comment-block)
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("aC" . evil-outer-haskell-comment-block)))
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(provide 'evil-text-objects-haskell)
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;;; evil-text-objects-haskell.el ends here
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