mirror of
https://github.com/magnars/multiple-cursors.el.git
synced 2025-10-13 05:03:03 +00:00
71 lines
2.6 KiB
EmacsLisp
71 lines
2.6 KiB
EmacsLisp
(require 'multiple-cursors-core)
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(defvar rrm/anchor (make-marker)
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"The position in the buffer that anchors the rectangular region.")
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(defvar rectangular-region-mode-map (make-sparse-keymap)
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"Keymap for rectangular region is mainly for rebinding C-g")
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(define-key rectangular-region-mode-map (kbd "C-g") 'rrm/keyboard-quit)
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(define-key rectangular-region-mode-map (kbd "<return>") 'rrm/switch-to-multiple-cursors)
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(defun rrm/keyboard-quit ()
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(interactive)
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(rectangular-region-mode 0)
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(rrm/remove-rectangular-region-overlays)
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(deactivate-mark))
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;; Bind this to a key (for instance H-SPC) to start rectangular-region-mode
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(defun set-rectangular-region-anchor ()
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(interactive)
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(set-marker rrm/anchor (point))
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(push-mark (point))
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(rectangular-region-mode 1))
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(defun rrm/remove-rectangular-region-overlays ()
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(mc/remove-fake-cursors)
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(mapc #'(lambda (o)
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(when (eq (overlay-get o 'type) 'additional-region)
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(delete-overlay o)))
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(overlays-in (point-min) (point-max))))
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(defun rrm/repaint ()
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(rrm/remove-rectangular-region-overlays)
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(let* ((annoying-arrows-mode nil)
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(point-column (current-column))
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(point-line (line-number-at-pos))
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(anchor-column (save-excursion (goto-char rrm/anchor) (current-column)))
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(anchor-line (save-excursion (goto-char rrm/anchor) (line-number-at-pos)))
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(left-column (if (< point-column anchor-column) point-column anchor-column))
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(right-column (if (> point-column anchor-column) point-column anchor-column))
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(navigation-func (if (< point-line anchor-line) 'next-line 'previous-line)))
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(move-to-column anchor-column t)
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(set-mark (point))
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(move-to-column point-column t)
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(mc/save-excursion
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(while (not (= anchor-line (line-number-at-pos)))
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(funcall navigation-func)
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(move-to-column right-column t)
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(move-to-column anchor-column t)
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(set-mark (point))
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(move-to-column point-column t)
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(mc/create-fake-cursor-at-point)))))
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(defun rrm/switch-to-multiple-cursors (&rest forms)
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(interactive)
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(rectangular-region-mode 0)
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(multiple-cursors-mode 1))
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(define-minor-mode rectangular-region-mode
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"A mode for creating a rectangular region to edit"
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nil " rr" rectangular-region-mode-map
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(if rectangular-region-mode
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(progn
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(add-hook 'after-change-functions 'rrm/switch-to-multiple-cursors t t)
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(add-hook 'post-command-hook 'rrm/repaint t t))
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(remove-hook 'after-change-functions 'rrm/switch-to-multiple-cursors t)
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(remove-hook 'post-command-hook 'rrm/repaint t)
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(set-marker rrm/anchor nil)))
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(provide 'rectangular-region-mode)
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