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301 lines
11 KiB
EmacsLisp
301 lines
11 KiB
EmacsLisp
;;; org-indent.el --- Dynamic indentation for Org-mode
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;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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;;
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;; Author: Carsten Dominik <carsten at orgmode dot org>
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;; Keywords: outlines, hypermedia, calendar, wp
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;; Homepage: http://orgmode.org
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;; Version: 7.3
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;;
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;; This file is part of GNU Emacs.
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;;
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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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;;
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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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;;
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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 <http://www.gnu.org/licenses/>.
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;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;; This is an implementation of dynamic virtual indentation. It works
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;; by adding text properties to a buffer to make sure lines are
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;; indented according to outline structure.
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;;; Code:
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(require 'org-macs)
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(require 'org-compat)
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(require 'org)
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(eval-when-compile
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(require 'cl))
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(defgroup org-indent nil
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"Options concerning dynamic virtual outline indentation."
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:tag "Org Indent"
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:group 'org)
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(defconst org-indent-max 40
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"Maximum indentation in characters.")
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(defconst org-indent-max-levels 40
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"Maximum indentation in characters.")
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(defvar org-indent-strings nil
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"Vector with all indentation strings.
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It will be set in `org-indent-initialize'.")
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(defvar org-indent-stars nil
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"Vector with all indentation star strings.
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It will be set in `org-indent-initialize'.")
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(defvar org-hide-leading-stars-before-indent-mode nil
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"Used locally.")
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(defcustom org-indent-boundary-char ?\ ; comment to protect space char
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"The end of the virtual indentation strings, a single-character string.
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The default is just a space, but if you wish, you can use \"|\" or so.
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This can be useful on a terminal window - under a windowing system,
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it may be prettier to customize the org-indent face."
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:group 'org-indent
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:set (lambda (var val)
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(set var val)
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(and org-indent-strings (org-indent-initialize)))
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:type 'character)
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(defcustom org-indent-mode-turns-off-org-adapt-indentation t
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"Non-nil means setting the variable `org-indent-mode' will \
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turn off indentation adaptation.
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For details see the variable `org-adapt-indentation'."
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:group 'org-indent
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:type 'boolean)
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(defcustom org-indent-mode-turns-on-hiding-stars t
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"Non-nil means setting the variable `org-indent-mode' will \
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turn on `org-hide-leading-stars'."
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:group 'org-indent
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:type 'boolean)
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(defcustom org-indent-indentation-per-level 2
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"Indentation per level in number of characters."
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:group 'org-indent
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:type 'integer)
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(defcustom org-indent-fix-section-after-idle-time 0.2
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"Seconds of idle time before fixing virtual indentation of section.
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The hooking-in of virtual indentation is not yet perfect. Occasionally,
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a change does not trigger to proper change of indentation. For this we
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have a timer action that fixes indentation in the current section after
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a short amount idle time. If we ever get the integration to work perfectly,
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this variable can be set to nil to get rid of the timer."
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:group 'org-indent
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:type '(choice
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(const "Do not install idle timer" nil)
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(number :tag "Idle time")))
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(defun org-indent-initialize ()
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"Initialize the indentation strings and set the idle timer."
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;; We use an idle timer to "repair" the current section, because the
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;; redisplay seems to have some problems.
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(unless org-indent-strings
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(when org-indent-fix-section-after-idle-time
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(run-with-idle-timer
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org-indent-fix-section-after-idle-time
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t 'org-indent-refresh-section)))
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;; Initialize the indentation and star vectors
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(setq org-indent-strings (make-vector (1+ org-indent-max) nil))
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(setq org-indent-stars (make-vector (1+ org-indent-max) nil))
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(aset org-indent-strings 0 nil)
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(aset org-indent-stars 0 nil)
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(loop for i from 1 to org-indent-max do
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(aset org-indent-strings i
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(org-add-props
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(concat (make-string (1- i) ?\ )
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(char-to-string org-indent-boundary-char))
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nil 'face 'org-indent)))
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(loop for i from 1 to org-indent-max-levels do
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(aset org-indent-stars i
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(org-add-props (make-string i ?*)
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nil 'face 'org-hide))))
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;;;###autoload
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(define-minor-mode org-indent-mode
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"When active, indent text according to outline structure.
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Internally this works by adding `line-prefix' properties to all non-headlines.
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These properties are updated locally in idle time.
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FIXME: How to update when broken?"
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nil " Ind" nil
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(cond
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((org-bound-and-true-p org-inhibit-startup)
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(setq org-indent-mode nil))
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((and org-indent-mode (featurep 'xemacs))
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(message "org-indent-mode does not work in XEmacs - refusing to turn it on")
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(setq org-indent-mode nil))
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((and org-indent-mode
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(not (org-version-check "23.1.50" "Org Indent mode" :predicate)))
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(message "org-indent-mode can crash Emacs 23.1 - refusing to turn it on!")
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(ding)
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(sit-for 1)
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(setq org-indent-mode nil))
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(org-indent-mode
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;; mode was turned on.
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(org-set-local 'indent-tabs-mode nil)
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(or org-indent-strings (org-indent-initialize))
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(when org-indent-mode-turns-off-org-adapt-indentation
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(org-set-local 'org-adapt-indentation nil))
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(when org-indent-mode-turns-on-hiding-stars
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(org-set-local 'org-hide-leading-stars-before-indent-mode
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org-hide-leading-stars)
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(org-set-local 'org-hide-leading-stars t))
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(make-local-variable 'buffer-substring-filters)
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(add-to-list 'buffer-substring-filters
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'org-indent-remove-properties-from-string)
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(org-add-hook 'org-after-demote-entry-hook
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'org-indent-refresh-section nil 'local)
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(org-add-hook 'org-after-promote-entry-hook
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'org-indent-refresh-section nil 'local)
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(org-add-hook 'org-font-lock-hook
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'org-indent-refresh-to nil 'local)
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(and font-lock-mode (org-restart-font-lock))
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)
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(t
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;; mode was turned off (or we refused to turn it on)
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(save-excursion
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(save-restriction
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(org-indent-remove-properties (point-min) (point-max))
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(kill-local-variable 'org-adapt-indentation)
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(when (boundp 'org-hide-leading-stars-before-indent-mode)
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(org-set-local 'org-hide-leading-stars
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org-hide-leading-stars-before-indent-mode))
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(setq buffer-substring-filters
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(delq 'org-indent-remove-properties-from-string
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buffer-substring-filters))
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(remove-hook 'org-after-promote-entry-hook
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'org-indent-refresh-section 'local)
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(remove-hook 'org-after-demote-entry-hook
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'org-indent-refresh-section 'local)
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(and font-lock-mode (org-restart-font-lock))
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(redraw-display))))))
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(defface org-indent
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(org-compatible-face nil nil)
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"Face for outline indentation.
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The default is to make it look like whitespace. But you may find it
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useful to make it ever so slightly different."
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:group 'org-faces)
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(defun org-indent-indent-buffer ()
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"Add indentation properties for the whole buffer."
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(interactive)
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(when org-indent-mode
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(save-excursion
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(save-restriction
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(widen)
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(org-indent-remove-properties (point-min) (point-max))
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(org-indent-add-properties (point-min) (point-max))))))
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(defun org-indent-remove-properties (beg end)
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"Remove indentations between BEG and END."
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(let ((inhibit-modification-hooks t))
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(with-silent-modifications
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(remove-text-properties beg end '(line-prefix nil wrap-prefix nil)))))
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(defun org-indent-remove-properties-from-string (string)
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"Remove indentations between BEG and END."
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(remove-text-properties 0 (length string)
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'(line-prefix nil wrap-prefix nil) string)
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string)
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(defvar org-indent-outline-re (concat "^" org-outline-regexp)
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"Outline heading regexp.")
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(defun org-indent-add-properties (beg end)
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"Add indentation properties between BEG and END.
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Assumes that BEG is at the beginning of a line."
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(when (or t org-indent-mode)
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(let ((inhibit-modification-hooks t)
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ov b e n level exit nstars)
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(with-silent-modifications
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(save-excursion
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(goto-char beg)
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(while (not exit)
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(setq e end)
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(if (not (re-search-forward org-indent-outline-re nil t))
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(setq e (point-max) exit t)
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(setq e (match-beginning 0))
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(if (>= e end) (setq exit t))
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(setq level (- (match-end 0) (match-beginning 0) 1))
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(setq nstars (- (* (1- level) org-indent-indentation-per-level)
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(1- level)))
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(add-text-properties
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(point-at-bol) (point-at-eol)
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(list 'line-prefix
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(aref org-indent-stars nstars)
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'wrap-prefix
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(aref org-indent-strings
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(* level org-indent-indentation-per-level)))))
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(when (and b (> e b))
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(add-text-properties
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b e (list 'line-prefix (aref org-indent-strings n)
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'wrap-prefix (aref org-indent-strings n))))
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(setq b (1+ (point-at-eol))
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n (* (or level 0) org-indent-indentation-per-level))))))))
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(defun org-indent-refresh-section ()
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"Refresh indentation properties in the current outline section.
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Point is assumed to be at the beginning of a headline."
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(interactive)
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(when org-indent-mode
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(let (beg end)
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(save-excursion
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(when (ignore-errors (org-back-to-heading))
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(setq beg (point))
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(setq end (or (save-excursion (or (outline-next-heading) (point)))))
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(org-indent-remove-properties beg end)
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(org-indent-add-properties beg end))))))
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(defun org-indent-refresh-to (limit)
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"Refresh indentation properties in the current outline section.
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Point is assumed to be at the beginning of a headline."
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(interactive)
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(when org-indent-mode
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(let ((beg (point)) (end limit))
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(save-excursion
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(and (ignore-errors (org-back-to-heading t))
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(setq beg (point))))
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(org-indent-remove-properties beg end)
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(org-indent-add-properties beg end)))
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(goto-char limit))
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(defun org-indent-refresh-subtree ()
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"Refresh indentation properties in the current outline subtree.
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Point is assumed to be at the beginning of a headline."
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(interactive)
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(when org-indent-mode
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(save-excursion
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(let (beg end)
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(setq beg (point))
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(setq end (save-excursion (org-end-of-subtree t t)))
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(org-indent-remove-properties beg end)
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(org-indent-add-properties beg end)))))
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(defun org-indent-refresh-buffer ()
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"Refresh indentation properties in the current outline subtree.
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Point is assumed to be at the beginning of a headline."
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(interactive)
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(when org-indent-mode
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(org-indent-mode -1)
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(org-indent-mode 1)))
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(provide 'org-indent)
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;; arch-tag: b76736bc-9f4a-43cd-977c-ecfd6689846a
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;;; org-indent.el ends here
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