109 lines
3.7 KiB
EmacsLisp
109 lines
3.7 KiB
EmacsLisp
;;; makesum.el --- generate key binding summary for Emacs -*- lexical-binding:t -*-
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;; Copyright (C) 1985, 2001-2020 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: help
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Displays a nice human-readable summary of all keybindings in a
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;; two-column format.
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;;; Code:
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;;;###autoload
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(defun make-command-summary ()
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"Make a summary of current key bindings in the buffer *Summary*.
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Previous contents of that buffer are killed first."
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(interactive)
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(message "Making command summary...")
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;; This puts a description of bindings in a buffer called *Help*.
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(save-window-excursion
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(describe-bindings))
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(with-output-to-temp-buffer "*Summary*"
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(save-excursion
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(let ((cur-mode mode-name))
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(set-buffer standard-output)
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(erase-buffer)
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(insert-buffer-substring "*Help*")
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(goto-char (point-min))
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(delete-region (point) (progn (forward-line 1) (point)))
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(while (search-forward " " nil t)
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(replace-match " "))
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(goto-char (point-min))
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(while (search-forward "-@ " nil t)
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(replace-match "-SP"))
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(goto-char (point-min))
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(while (search-forward " .. ~ " nil t)
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(replace-match "SP .. ~"))
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(goto-char (point-min))
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(while (search-forward "C-?" nil t)
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(replace-match "DEL"))
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(goto-char (point-min))
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(while (search-forward "C-i" nil t)
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(replace-match "TAB"))
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(goto-char (point-min))
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(when (re-search-forward "^Local Bindings:" nil t)
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(forward-char -1)
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(insert " for " (format-mode-line cur-mode) " Mode")
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(while (search-forward "??\n" nil t)
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(delete-region (point)
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(progn
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(forward-line -1)
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(point)))))
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(goto-char (point-min))
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(insert "Emacs command summary, " (substring (current-time-string) 0 10)
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".\n")
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;; Delete "key binding" and underlining of dashes.
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(delete-region (point) (progn (forward-line 2) (point)))
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(forward-line 1) ;Skip blank line
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(while (not (eobp))
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(let ((beg (point)))
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(or (re-search-forward "^$" nil t)
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(goto-char (point-max)))
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(double-column beg (point))
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(forward-line 1)))
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(goto-char (point-min)))))
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(message "Making command summary...done"))
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(defun double-column (start end)
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"Reformat buffer contents from START to END into two columns."
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(interactive "r")
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(let (half lines
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(nlines (count-lines start end))
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(from-end (- (point-max) end)))
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(when (> nlines 1)
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(setq half (/ (1+ nlines) 2))
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(goto-char start)
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(save-excursion
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(forward-line half)
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(dotimes (_ (- nlines half))
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(push (buffer-substring (point) (line-end-position))
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lines)
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(delete-region (point) (progn (forward-line 1) (point)))))
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(dolist (line (nreverse lines))
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(end-of-line)
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(indent-to 41)
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(insert line)
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(forward-line 1)))
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(goto-char (- (point-max) from-end))))
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(provide 'makesum)
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;;; makesum.el ends here
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