Emacs - 无法获得缓冲提供 - 保存工作

Question

我想让Emacs问我是否要保存修改后的缓冲区,当缓冲区与文件没有关联时.要打开一个新缓冲区(不访问文件),我的.emacs文件中有以下功能:

;; Creates a new empty buffer
(defun new-empty-buffer ()
  "Opens a new empty buffer."
  (interactive)
  (let ((buf (generate-new-buffer "untitled")))
    (switch-to-buffer buf)
    (funcall (and default-major-mode))
    (setq buffer-offer-save t)))

我认为将"缓冲 - 提供 - 保存"设置为不是nil的东西就可以了.但每当我使用"kill-this-buffer"杀死缓冲区时,它会立即被杀死而不会有任何问题.

这发生在GNU Emacs 23.1.1上

有任何想法吗？

谢谢,W

Answer 1

编辑以添加使用buffers-offer-save. 注意：该变量buffer-offer-save仅在退出Emacs时使用。

您可以从此代码开始并将其自定义为您想要的内容：

(add-to-list 'kill-buffer-query-functions 'ask-me-first)
(defun ask-me-first ()
  "prompt when killing a buffer"
  (if (or buffer-offer-save 
          (eq this-command 'kill-this-buffer)
          (and (buffer-modified-p) (not (buffer-file-name))))
      (y-or-n-p (format "Do you want to kill %s without saving? " (buffer-name)))
    t))

经过进一步思考，这有点严厉，因为系统会提示您所有被终止的缓冲区，并且 Emacs 经常使用大量临时缓冲区。如果您只想在尝试以交互方式终止缓冲区（不与文件关联）时收到提示。

您可以使用此建议，该建议仅在您以交互方式尝试终止缓冲区时提示您：

(defadvice kill-buffer (around kill-buffer-ask-first activate)
  "if called interactively, prompt before killing"
  (if (and (or buffer-offer-save (interactive-p))
           (buffer-modified-p)
           (not (buffer-file-name)))
      (let ((answ (completing-read
                   (format "Buffer '%s' modified and not associated with a file, what do you want to do? (k)ill (s)ave (a)bort? " (buffer-name))
                   '("k" "s" "a")
                   nil
                   t)))
        (when (cond ((string-match answ "k")
                     ;; kill
                     t)
                    ((string-match answ "s")
                     ;; write then kill
                     (call-interactively 'write-file)
                     t)
                    (nil))
          ad-do-it)

        t)
    ;; not prompting, just do it
    ad-do-it))