Du kan inte välja fler än 25 ämnen
Ämnen måste starta med en bokstav eller siffra, kan innehålla bindestreck ('-') och vara max 35 tecken långa.
130 rader
4.5 KiB
130 rader
4.5 KiB
;;; haskell-move-nested.el --- Change the column of text nested below a line -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2010 Chris Done
|
|
|
|
;; Author: Chris Done <chrisdone@gmail.com>
|
|
|
|
;; 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/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This module is intended for Haskell mode users, but is
|
|
;; independent of Haskell mode.
|
|
|
|
;; Example usage:
|
|
|
|
;; (define-key haskell-mode-map (kbd "C-,") 'haskell-move-nested-left)
|
|
;; (define-key haskell-mode-map (kbd "C-.") 'haskell-move-nested-right)
|
|
|
|
;;; Code:
|
|
|
|
;;;###autoload
|
|
(defun haskell-move-nested (cols)
|
|
"Shift the nested off-side-rule block adjacent to point by COLS columns to the right.
|
|
|
|
In Transient Mark mode, if the mark is active, operate on the contents
|
|
of the region instead.
|
|
"
|
|
(save-excursion
|
|
(if (and transient-mark-mode mark-active)
|
|
(progn
|
|
(indent-rigidly (region-beginning) (region-end) cols)
|
|
(setq deactivate-mark nil))
|
|
(let ((region (haskell-move-nested-region)))
|
|
(when region
|
|
(indent-rigidly (car region) (cdr region) cols))))))
|
|
|
|
;;;###autoload
|
|
(defun haskell-move-nested-right (cols)
|
|
"Increase indentation of the following off-side-rule block adjacent to point.
|
|
|
|
Use a numeric prefix argument to indicate amount of indentation to apply.
|
|
|
|
In Transient Mark mode, if the mark is active, operate on the contents
|
|
of the region instead."
|
|
(interactive "p")
|
|
(haskell-move-nested cols)
|
|
)
|
|
|
|
;;;###autoload
|
|
(defun haskell-move-nested-left (cols)
|
|
"Decrease indentation of the following off-side-rule block adjacent to point.
|
|
|
|
Use a numeric prefix argument to indicate amount of indentation to apply.
|
|
|
|
In Transient Mark mode, if the mark is active, operate on the contents
|
|
of the region instead."
|
|
(interactive "p")
|
|
(haskell-move-nested (- cols))
|
|
)
|
|
|
|
(defun haskell-move-nested-region ()
|
|
"Infer region off-side-rule block adjacent to point.
|
|
Used by `haskell-move-nested'.
|
|
"
|
|
(save-excursion
|
|
(let ((starting-level (current-column)))
|
|
(forward-line)
|
|
(let ((current-level (haskell-move-nested-indent-level)))
|
|
(let ((start-point (line-beginning-position))
|
|
(start-end-point (line-end-position))
|
|
(end-point nil)
|
|
(last-line 0))
|
|
(forward-line)
|
|
(while (and (not (= (line-beginning-position) last-line))
|
|
(or (> (haskell-move-nested-indent-level) starting-level)
|
|
(and (> current-level starting-level)
|
|
(>= (haskell-move-nested-indent-level) current-level))))
|
|
(setq last-line (line-beginning-position))
|
|
(setq end-point (line-end-position))
|
|
(forward-line))
|
|
(cons start-point (or end-point
|
|
start-end-point)))))))
|
|
|
|
(defun haskell-move-nested-indent-level ()
|
|
(max
|
|
0
|
|
(1- (length
|
|
(buffer-substring-no-properties
|
|
(line-beginning-position)
|
|
(or (save-excursion (goto-char (line-beginning-position))
|
|
(search-forward-regexp "[^ ]" (line-end-position) t 1))
|
|
(line-beginning-position)))))))
|
|
|
|
(defun haskell-kill-nested ()
|
|
"Kill the nested region after point."
|
|
(interactive)
|
|
(let ((start (point))
|
|
(reg (save-excursion
|
|
(search-backward-regexp "^[ ]+" (line-beginning-position) t 1)
|
|
(search-forward-regexp "[^ ]" (line-end-position) t 1)
|
|
(haskell-move-nested-region))))
|
|
(kill-region start (cdr reg))))
|
|
|
|
(defun haskell-delete-nested ()
|
|
"Kill the nested region after point."
|
|
(interactive)
|
|
(let ((start (point))
|
|
(reg (save-excursion
|
|
(search-backward-regexp "^[ ]+" (line-beginning-position) t 1)
|
|
(search-forward-regexp "[^ ]" (line-end-position) t 1)
|
|
(haskell-move-nested-region))))
|
|
(delete-region start (cdr reg))))
|
|
|
|
(provide 'haskell-move-nested)
|
|
|
|
;;; haskell-move-nested.el ends here
|