rectangular-region-mode.el (4685B)
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;;; rectangular-region-mode.el
;; Copyright (C) 2012 Magnar Sveen
;; Author: Magnar Sveen <magnars@gmail.com>
;; Keywords: editing cursors
;; 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:
;; (global-set-key (kbd "H-SPC") 'set-rectangular-region-anchor)
;; Think of this one as `set-mark` except you're marking a rectangular region. It is
;; an exceedingly quick way of adding multiple cursors to multiple lines.
;;; Code:
(require 'multiple-cursors-core)
(defvar rrm/anchor (make-marker)
"The position in the buffer that anchors the rectangular region.")
(defvar rectangular-region-mode-map (make-sparse-keymap)
"Keymap for rectangular region is mainly for rebinding C-g")
(define-key rectangular-region-mode-map (kbd "C-g") 'rrm/keyboard-quit)
(define-key rectangular-region-mode-map (kbd "<return>") 'rrm/switch-to-multiple-cursors)
(defvar rectangular-region-mode nil)
(defun rrm/keyboard-quit ()
"Exit rectangular-region-mode."
(interactive)
(rectangular-region-mode 0)
(rrm/remove-rectangular-region-overlays)
(deactivate-mark))
;; Bind this to a key (for instance H-SPC) to start rectangular-region-mode
;;;###autoload
(defun set-rectangular-region-anchor ()
"Anchors the rectangular region at point.
Think of this one as `set-mark' except you're marking a rectangular region. It is
an exceedingly quick way of adding multiple cursors to multiple lines."
(interactive)
(set-marker rrm/anchor (point))
(push-mark (point))
(rectangular-region-mode 1))
(defun rrm/remove-rectangular-region-overlays ()
"Remove all rectangular-region overlays."
(mc/remove-fake-cursors)
(mapc #'(lambda (o)
(when (eq (overlay-get o 'type) 'additional-region)
(delete-overlay o)))
(overlays-in (point-min) (point-max))))
(defun rrm/repaint ()
"Start from the anchor and draw a rectangle between it and point."
(if (not rectangular-region-mode)
(remove-hook 'post-command-hook 'rrm/repaint t)
;; else
(rrm/remove-rectangular-region-overlays)
(let* ((annoying-arrows-mode nil)
(point-column (current-column))
(point-line (line-number-at-pos))
(anchor-column (save-excursion (goto-char rrm/anchor) (current-column)))
(anchor-line (save-excursion (goto-char rrm/anchor) (line-number-at-pos)))
(left-column (if (< point-column anchor-column) point-column anchor-column))
(right-column (if (> point-column anchor-column) point-column anchor-column))
(navigation-step (if (< point-line anchor-line) 1 -1)))
(move-to-column anchor-column)
(set-mark (point))
(move-to-column point-column)
(mc/save-excursion
(while (not (= anchor-line (line-number-at-pos)))
(forward-line navigation-step)
(move-to-column anchor-column)
(when (= anchor-column (current-column))
(set-mark (point))
(move-to-column point-column)
(when (= point-column (current-column))
(mc/create-fake-cursor-at-point))))))))
(defun rrm/switch-to-multiple-cursors (&rest forms)
"Switch from rectangular-region-mode to multiple-cursors-mode."
(interactive)
(rectangular-region-mode 0)
(multiple-cursors-mode 1))
(defadvice er/expand-region (before switch-from-rrm-to-mc activate)
(when rectangular-region-mode
(rrm/switch-to-multiple-cursors)))
(defadvice kill-ring-save (before switch-from-rrm-to-mc activate)
(when rectangular-region-mode
(rrm/switch-to-multiple-cursors)))
(define-minor-mode rectangular-region-mode
"A mode for creating a rectangular region to edit"
nil " rr" rectangular-region-mode-map
(if rectangular-region-mode
(progn
(add-hook 'after-change-functions 'rrm/switch-to-multiple-cursors t t)
(add-hook 'post-command-hook 'rrm/repaint t t))
(remove-hook 'after-change-functions 'rrm/switch-to-multiple-cursors t)
(remove-hook 'post-command-hook 'rrm/repaint t)
(set-marker rrm/anchor nil)))
(provide 'rectangular-region-mode)
;;; rectangular-region-mode.el ends here
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