emacs - 在 emacs 中上下移动行/区域

Question

在 emacs 中向上或向下移动选定区域或行(如果没有选择)的最简单方法是什么？我正在寻找与 Eclipse 中相同的功能(仅限于 M-up、M-down)。

Answer 1

更新:从 Marmalade 或 MELPA 安装 move-text 软件包获取以下代码。

这是我使用的方法，它适用于区域和单独的线路:

(defun move-text-internal (arg)
  (cond
   ((and mark-active transient-mark-mode)
    (if (> (point) (mark))
        (exchange-point-and-mark))
    (let ((column (current-column))
          (text (delete-and-extract-region (point) (mark))))
      (forward-line arg)
      (move-to-column column t)
      (set-mark (point))
      (insert text)
      (exchange-point-and-mark)
      (setq deactivate-mark nil)))
   (t
    (let ((column (current-column)))
      (beginning-of-line)
      (when (or (> arg 0) (not (bobp)))
        (forward-line)
        (when (or (< arg 0) (not (eobp)))
          (transpose-lines arg)
          (when (and (eval-when-compile
                       '(and (>= emacs-major-version 24)
                             (>= emacs-minor-version 3)))
                     (< arg 0))
            (forward-line -1)))
        (forward-line -1))
      (move-to-column column t)))))

(defun move-text-down (arg)
  "Move region (transient-mark-mode active) or current line
  arg lines down."
  (interactive "*p")
  (move-text-internal arg))

(defun move-text-up (arg)
  "Move region (transient-mark-mode active) or current line
  arg lines up."
  (interactive "*p")
  (move-text-internal (- arg)))


(global-set-key [M-S-up] 'move-text-up)
(global-set-key [M-S-down] 'move-text-down)