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79 lines
2.9 KiB
EmacsLisp
79 lines
2.9 KiB
EmacsLisp
;;; mb-depth.el --- Indicate minibuffer-depth in prompt
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;;
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;; Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
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;;
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;; Author: Miles Bader <miles@gnu.org>
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;; Keywords: convenience
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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, or (at your option)
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;; 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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;
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;; Defines the minor mode `minibuffer-indicate-depth-mode'.
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;;
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;; When active, any recursive use of the minibuffer will show
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;; the recursion depth in the minibuffer prompt. This is only
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;; useful if `enable-recursive-minibuffers' is non-nil.
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;;; Code:
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(defvar minibuf-depth-indicator-function nil
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"If non-nil, function to set up the minibuffer depth indicator.
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It is called with one argument, the minibuffer depth,
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and must return a string.")
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;; An overlay covering the prompt. This is a buffer-local variable in
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;; each affected minibuffer.
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;;
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(defvar minibuf-depth-overlay)
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(make-variable-buffer-local 'minibuf-depth-overlay)
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;; This function goes on minibuffer-setup-hook
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(defun minibuf-depth-setup-minibuffer ()
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"Set up a minibuffer for `minibuffer-indicate-depth-mode'.
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The prompt should already have been inserted."
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(when (> (minibuffer-depth) 1)
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(setq minibuf-depth-overlay (make-overlay (point-min) (1+ (point-min))))
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(overlay-put minibuf-depth-overlay 'before-string
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(if minibuf-depth-indicator-function
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(funcall minibuf-depth-indicator-function (minibuffer-depth))
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(propertize (format "[%d]" (minibuffer-depth)) 'face 'highlight)))
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(overlay-put minibuf-depth-overlay 'evaporate t)))
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;;;###autoload
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(define-minor-mode minibuffer-indicate-depth-mode
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"Toggle Minibuffer Indicate Depth mode.
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When active, any recursive use of the minibuffer will show
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the recursion depth in the minibuffer prompt. This is only
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useful if `enable-recursive-minibuffers' is non-nil.
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With prefix argument ARG, turn on if positive, otherwise off.
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Returns non-nil if the new state is enabled."
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:global t
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:group 'minibuffer
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(if minibuffer-indicate-depth-mode
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;; Enable the mode
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(add-hook 'minibuffer-setup-hook 'minibuf-depth-setup-minibuffer)
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;; Disable the mode
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(remove-hook 'minibuffer-setup-hook 'minibuf-depth-setup-minibuffer)))
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(provide 'mb-depth)
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;; arch-tag: 50224089-5bf5-46f8-803d-18f018c5eacf
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;;; mb-depth.el ends here
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