使用 emacs 在本地禁用自动填充模式（或取消填充段落）

Question

我使用 M-q 填充段落，我可以在自动填充模式下执行取消填充段落吗？

在 org 模式下，我有时会输入 [[Very long HTML][Name with spaces]]，对于“Name with spaces”，自动填充模式会根据插入的空间，这使得它非常难看。

是否有类似 un-fill-paragraph 的命令？或者，有没有办法暂时/本地禁用自动填充模式？

Answer 1

在调用fill-paragraph 之前，Emacs 不会记录您的线路。所以你唯一能做的就是运行命令undo的C-_。它可以撤消您的 fill-paragraph 命令，但前提是它是前面的命令调用。

如果你想将多行段落放在一行上，你可以这样做：

• 选择地区
• CM-% Cq Cj RET SPACE RET !

Answer 2

Xah Lee 已经更新了他的代码，因为 monotux 的回答，我对它进行了一些重构以提高可读性：

(defun my-toggle-fill-paragraph ()
  ;; Based on http://xahlee.org/emacs/modernization_fill-paragraph.html
  "Fill or unfill the current paragraph, depending upon the current line length.
When there is a text selection, act on the region.
See `fill-paragraph' and `fill-region'."
  (interactive)
  ;; We set a property 'currently-filled-p on this command's symbol
  ;; (i.e. on 'my-toggle-fill-paragraph), thus avoiding the need to
  ;; create a variable for remembering the current fill state.
  (save-excursion
    (let* ((deactivate-mark nil)
           (line-length (- (line-end-position) (line-beginning-position)))
           (currently-filled (if (eq last-command this-command)
                                 (get this-command 'currently-filled-p)
                               (< line-length fill-column)))
           (fill-column (if currently-filled
                            most-positive-fixnum
                          fill-column)))

      (if (region-active-p)
          (fill-region (region-beginning) (region-end))
        (fill-paragraph))

      (put this-command 'currently-filled-p (not currently-filled)))))

Answer 3

为了在 Org 模式下从一个段落中重新创建一个长行，我给了自己一个新命令。下面是相关的 Emacs Lisp 代码：

(defun fp-unfill-paragraph (&optional justify region)
  (interactive (progn
         (barf-if-buffer-read-only)
         (list (if current-prefix-arg 'full) t)))
  (interactive)
  (let ((fill-column 100000))
    (fill-paragraph justify region)))

(global-set-key "\C-ceu" 'fp-unfill-paragraph)

当然，您可以根据需要调整命令键绑定！

Answer 4

我使用以下 sn-p 来填充和取消填充段落（仅使用 M-q），它真的非常方便。我从 Xah Lee 那里借来了它，但删除了一些 cmets 和空格以使其适合这里。第一条评论中的链接指向他的原始代码。

;; http://xahlee.org/emacs/modernization_fill-paragraph.html
(defun compact-uncompact-block ()
  "Remove or add line endings on the current block of text.
This is similar to a toggle for fill-paragraph and unfill-paragraph
When there is a text selection, act on the region.

When in text mode, a paragraph is considered a block. When in programing
language mode, the block defined by between empty lines.

Todo: The programing language behavior is currently not done.
Right now, the code uses fill* functions, so does not work or work well
in programing lang modes. A proper implementation to compact is replacing
newline chars by space when the newline char is not inside string.
"
  (interactive)
  (let (bds currentLineCharCount currentStateIsCompact
            (bigFillColumnVal 4333999) (deactivate-mark nil))
    (save-excursion
      (setq currentLineCharCount
            (progn
              (setq bds (bounds-of-thing-at-point 'line))
              (length (buffer-substring-no-properties (car bds) (cdr bds)))))
      (setq currentStateIsCompact
            (if (eq last-command this-command)
                (get this-command 'stateIsCompact-p)
              (if (> currentLineCharCount fill-column) t nil)))
      (if (and transient-mark-mode mark-active)
          (if currentStateIsCompact
              (fill-region (region-beginning) (region-end))
            (let ((fill-column bigFillColumnVal))
              (fill-region (region-beginning) (region-end)))
            )
        (if currentStateIsCompact
            (fill-paragraph nil)
          (let ((fill-column bigFillColumnVal))
            (fill-paragraph nil))))
      (put this-command 'stateIsCompact-p
           (if currentStateIsCompact
               nil t)))))
(global-set-key (kbd "M-q") 'compact-uncompact-block)