如何在Emacs中复制整行?

C-a C-SPACE C-n M-w C-y

• C-a
• C-SPACE
• C-n
• M-w
• C-y

C-a C-k C-k C-y C-y

• C-k

C-d delete-char C-c C-d .emacs

(global-set-key "\C-c\C-d" "\C-a\C- \C-n\M-w\C-y")

(defun duplicate-line()
  (interactive)
  (move-beginning-of-line 1)
  (kill-line)
  (yank)
  (open-line 1)
  (next-line 1)
  (yank)
)
(global-set-key (kbd "C-d") 'duplicate-line)

discussion in gnu.emacs.sources from November 1997

(defun duplicate-line (arg)
  "Duplicate current line, leaving point in lower line."
  (interactive "*p")

  ;; save the point for undo
  (setq buffer-undo-list (cons (point) buffer-undo-list))

  ;; local variables for start and end of line
  (let ((bol (save-excursion (beginning-of-line) (point)))
        eol)
    (save-excursion

      ;; don't use forward-line for this, because you would have
      ;; to check whether you are at the end of the buffer
      (end-of-line)
      (setq eol (point))

      ;; store the line and disable the recording of undo information
      (let ((line (buffer-substring bol eol))
            (buffer-undo-list t)
            (count arg))
        ;; insert the line arg times
        (while (> count 0)
          (newline)         ;; because there is no newline in 'line'
          (insert line)
          (setq count (1- count)))
        )

      ;; create the undo information
      (setq buffer-undo-list (cons (cons eol (point)) buffer-undo-list)))
    ) ; end-of-let

  ;; put the point in the lowest line and return
  (next-line arg))

(global-set-key (kbd "C-d") 'duplicate-line)

kill-line C-k C-a C-y kill-whole-line

C-S-Backspace
C-y
C-y

(defun duplicate-line-or-region (&optional n)
  "Duplicate current line, or region if active.
With argument N, make N copies.
With negative N, comment out original line and use the absolute value."
  (interactive "*p")
  (let ((use-region (use-region-p)))
    (save-excursion
      (let ((text (if use-region        ;Get region if active, otherwise line
                      (buffer-substring (region-beginning) (region-end))
                    (prog1 (thing-at-point 'line)
                      (end-of-line)
                      (if (< 0 (forward-line 1)) ;Go to beginning of next line, or make a new one
                          (newline))))))
        (dotimes (i (abs (or n 1)))     ;Insert N times, or once if not specified
          (insert text))))
    (if use-region nil                  ;Only if we're working with a line (not a region)
      (let ((pos (- (point) (line-beginning-position)))) ;Save column
        (if (> 0 n)                             ;Comment out original with negative arg
            (comment-region (line-beginning-position) (line-end-position)))
        (forward-line 1)
        (forward-char pos)))))

C-c d

(global-set-key [?\C-c ?d] 'duplicate-line-or-region)

C-c

  (open-line 1)
  (next-line 1)

  (newline)

(defun duplicate-line()
  (interactive)
  (move-beginning-of-line 1)
  (kill-line)
  (yank)
  (newline)
  (yank)
)
(global-set-key (kbd "C-d") 'duplicate-line)

(defun duplicate-line ()
    "Clone line at cursor, leaving the latter intact."
    (interactive)
    (save-excursion
        (let ((kill-read-only-ok t) deactivate-mark)
            (toggle-read-only 1)
            (kill-whole-line)
            (toggle-read-only 0)
            (yank))))

copy-from-above-command

C-a C-k C-k C-y C-y

(setq kill-whole-line t)

C-a go to beginning of line
C-k kill-line (i.e. cut the line into clipboard)
C-y yank (i.e. paste); the first time you get the killed line back; 
    second time gives the duplicated line.

(transient-mark-mode t)
(defadvice kill-ring-save (before slick-copy activate compile)
  "When called interactively with no active region, copy a single line instead."
  (interactive
   (if mark-active (list (region-beginning) (region-end))
     (message "Copied line")
     (list (line-beginning-position)
           (line-beginning-position 2)))))
(defadvice kill-region (before slick-cut activate compile)
  "When called interactively with no active region, kill a single line instead."
  (interactive
   (if mark-active (list (region-beginning) (region-end))
     (list (line-beginning-position)
           (line-beginning-position 2)))))

.emacs M-w C-w C-a M-w C-y C-y C-y ...

duplicate-line

  (defun jr-duplicate-line ()
    "EASY"
    (interactive)
    (save-excursion
      (let ((line-text (buffer-substring-no-properties
                        (line-beginning-position)
                        (line-end-position))))
        (move-end-of-line 1)
        (newline)
        (insert line-text))))
  (global-set-key "\C-cd" 'jr-duplicate-line)

M-w C-a RET C-y

(defun duplicate-line ()
  "Duplicate current line"
  (interactive)
  (kill-whole-line)
  (yank)
  (yank))
(global-set-key (kbd "C-x M-d") 'duplicate-line)

Avy

http://i68.tinypic.com/24fk5eu.png

kill-whole-line

(interactive "*")

(defun duplicate-line ()
  "Clone line at cursor, leaving the latter intact."
  (interactive "*")
  (save-excursion
    ;; The last line of the buffer cannot be killed
    ;; if it is empty. Instead, simply add a new line.
    (if (and (eobp) (bolp))
        (newline)
      ;; Otherwise kill the whole line, and yank it back.
      (let ((kill-read-only-ok t)
            deactivate-mark)
        (toggle-read-only 1)
        (kill-whole-line)
        (toggle-read-only 0)
        (yank)))))

(defadvice kill-ring-save (before slick-copy activate compile)
  "When called interactively with no active region, COPY a single line instead."
  (interactive
   (if mark-active (list (region-beginning) (region-end))
     (message "Copied line")
     (list (line-beginning-position)
           (line-beginning-position 2)))))

(defadvice kill-region (before slick-cut activate compile)
  "When called interactively with no active region, KILL a single line instead."
  (interactive
   (if mark-active (list (region-beginning) (region-end))
     (message "Killed line")
     (list (line-beginning-position)
           (line-beginning-position 2)))))

(defun move-line-up ()
  "Move up the current line."
  (interactive)
  (transpose-lines 1)
  (forward-line -2)
  (indent-according-to-mode))

(defun move-line-down ()
  "Move down the current line."
  (interactive)
  (forward-line 1)
  (transpose-lines 1)
  (forward-line -1)
  (indent-according-to-mode))

(global-set-key [(meta shift up)]  'move-line-up)
(global-set-key [(meta shift down)]  'move-line-down)

(defun duplicate-line ()
  "Duplicate current line."
  (interactive)
  (let ((text (buffer-substring-no-properties (point-at-bol) (point-at-eol)))
        (cur-col (current-column)))
    (end-of-line) (insert "\n" text)
    (beginning-of-line) (right-char cur-col)))
(global-set-key (kbd "C-c d l") 'duplicate-line)

(defun duplicate-line ()
  "Duplicate current line."
  (interactive)
  (let* ((text (buffer-substring-no-properties (point-at-bol) (point-at-eol)))
         (cur-col (length (buffer-substring-no-properties (point-at-bol) (point)))))
    (end-of-line) (insert "\n" text)
    (beginning-of-line) (right-char cur-col)))
(global-set-key (kbd "C-c d l") 'duplicate-line)

(defun wrx/duplicate-line-or-region (beg end)
  "Implements functionality of JetBrains' `Command-d' shortcut for `duplicate-line'.
   BEG & END correspond point & mark, smaller first
   `use-region-p' explained: 
   http://emacs.stackexchange.com/questions/12334/elisp-for-applying-command-to-only-the-selected-region#answer-12335"
  (interactive "r")
  (if (use-region-p)
      (wrx/duplicate-region-in-buffer beg end)
    (wrx/duplicate-line-in-buffer)))

(defun wrx/duplicate-region-in-buffer (beg end)
  "copy and duplicate context of current active region
   |------------------------+----------------------------|
   |        before          |           after            |
   |------------------------+----------------------------|
   | first <MARK>line here  | first line here            |
   | second item<POINT> now | second item<MARK>line here |
   |                        | second item<POINT> now     |
   |------------------------+----------------------------|
   TODO: Acts funky when point < mark"
  (set-mark-command nil)
  (insert (buffer-substring beg end))
  (setq deactivate-mark nil))

(defun wrx/duplicate-line-in-buffer ()
  "Duplicate current line, maintaining column position.
   |--------------------------+--------------------------|
   |          before          |          after           |
   |--------------------------+--------------------------|
   | lorem ipsum<POINT> dolor | lorem ipsum dolor        |
   |                          | lorem ipsum<POINT> dolor |
   |--------------------------+--------------------------|
   TODO: Save history for `Cmd-Z'
   Context: 
   http://stackoverflow.com/questions/88399/how-do-i-duplicate-a-whole-line-in-emacs#answer-551053"
  (setq columns-over (current-column))
  (save-excursion
    (kill-whole-line)
    (yank)
    (yank))
  (let (v)
    (dotimes (n columns-over v)
      (right-char)
      (setq v (cons n v))))
  (next-line))

(global-set-key (kbd "M-D") 'wrx/duplicate-line-or-region)

(defun duplicate-line (&optional arg)
  "Duplicate it. With prefix ARG, duplicate ARG times."
  (interactive "p")
  (next-line 
   (save-excursion 
     (let ((beg (line-beginning-position))
           (end (line-end-position)))
       (copy-region-as-kill beg end)
       (dotimes (num arg arg)
         (end-of-line) (newline)
         (yank))))))

(defun duplicate-line (&optional arg)
  "Duplicate it. With prefix ARG, duplicate ARG times."
  (interactive "p")
  (save-excursion 
    (let ((beg (line-beginning-position))
          (end 
           (progn (forward-line (1- arg)) (line-end-position))))
      (copy-region-as-kill beg end)
      (end-of-line) (newline)
      (yank)))
  (next-line arg))

(global-set-key (kbd "C-S-d") 'duplicate-line)

;; http://www.emacswiki.org/emacs/WholeLineOrRegion#toc2
;; cut, copy, yank
(defadvice kill-ring-save (around slick-copy activate)
  "When called interactively with no active region, copy a single line instead."
  (if (or (use-region-p) (not (called-interactively-p)))
      ad-do-it
    (kill-new (buffer-substring (line-beginning-position)
                                (line-beginning-position 2))
              nil '(yank-line))
    (message "Copied line")))
(defadvice kill-region (around slick-copy activate)
  "When called interactively with no active region, kill a single line instead."
  (if (or (use-region-p) (not (called-interactively-p)))
      ad-do-it
    (kill-new (filter-buffer-substring (line-beginning-position)
                                       (line-beginning-position 2) t)
              nil '(yank-line))))
(defun yank-line (string)
  "Insert STRING above the current line."
  (beginning-of-line)
  (unless (= (elt string (1- (length string))) ?\n)
    (save-excursion (insert "\n")))
  (insert string))

(global-set-key (kbd "<f2>") 'kill-region)    ; cut.
(global-set-key (kbd "<f3>") 'kill-ring-save) ; copy.
(global-set-key (kbd "<f4>") 'yank)           ; paste.

C-a C-SPACE C-n M-w C-y

C-3 C-S-o

(defun duplicate-lines (arg)
  (interactive "P")
  (let* ((arg (if arg arg 1))
         (beg (save-excursion (beginning-of-line) (point)))
         (end (save-excursion (end-of-line) (point)))
         (line (buffer-substring-no-properties beg end)))
    (save-excursion
      (end-of-line)
      (open-line arg)
      (setq num 0)
      (while (< num arg)
        (setq num (1+ num))
        (forward-line 1)
        (insert-string line))
      )))

(global-set-key (kbd "C-S-o") 'duplicate-lines)

<C-S-backspace>

C-/

<C-S-backspace> C-/