410 lines
22 KiB
EmacsLisp
410 lines
22 KiB
EmacsLisp
;;; toc-org.el --- add table of contents to org-mode files (formerly, org-toc)
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;; Copyright (C) 2014 Sergei Nosov
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;; Author: Sergei Nosov <sergei.nosov [at] gmail.com>
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;; Version: 1.0
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;; Keywords: org-mode org-toc toc-org org toc table of contents
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;; URL: https://github.com/snosov1/toc-org
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; 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., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; toc-org helps you to have an up-to-date table of contents in org files
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;; without exporting (useful primarily for readme files on GitHub).
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;; NOTE: Previous name of the package is org-toc. It was changed because of a
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;; name conflict with one of the org contrib modules.
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;; After installation put into your .emacs file something like
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;; (if (require 'toc-org nil t)
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;; (add-hook 'org-mode-hook 'toc-org-enable)
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;; (warn "toc-org not found"))
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;; And every time you'll be saving an org file, the first headline with a :TOC:
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;; tag will be updated with the current table of contents.
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;; For details, see https://github.com/snosov1/toc-org
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;;; Code:
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(require 'ert)
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(require 'org)
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(defgroup toc-org nil
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"toc-org is a utility to have an up-to-date table of contents
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in the org files without exporting (useful primarily for readme
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files on GitHub)"
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:group 'org)
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;; just in case, simple regexp "^*.*:toc:\\($\\|[^ ]*:$\\)"
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(defconst toc-org-toc-org-regexp "^*.*:toc\\([@_][0-9]\\|\\([@_][0-9][@_][a-zA-Z]+\\)\\)?:\\($\\|[^ ]*:$\\)"
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"Regexp to find the heading with the :toc: tag")
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(defconst toc-org-tags-regexp "\s*:[[:word:]:@]*:\s*$"
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"Regexp to find tags on the line")
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(defconst toc-org-states-regexp "^*+\s+\\(TODO\s+\\|DONE\s+\\)"
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"Regexp to find states on the line")
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(defconst toc-org-links-regexp "\\[\\[\\(.*?\\)\\]\\[\\(.*?\\)\\]\\]"
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"Regexp to find states on the line")
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(defconst toc-org-special-chars-regexp "[^[:alnum:]_-]"
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"Regexp with the special characters (which are omitted in hrefs
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by GitHub)")
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(defcustom toc-org-max-depth 2
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"Maximum depth of the headings to use in the table of
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contents. The default of 2 uses only the highest level headings
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and their subheadings (one and two stars)."
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:group 'toc-org)
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(defcustom toc-org-hrefify-default "gh"
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"Default hrefify function to use."
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:group 'toc-org)
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(defcustom toc-org-enable-links-opening t
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"With this option, org-open-at-point (C-c C-o) should work on
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the TOC links (even if the style is different from org)."
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:group 'toc-org)
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(defvar-local toc-org-hrefify-hash nil
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"Buffer local hash-table that is used to enable links
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opening. The keys are hrefified headings, the values are original
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headings.")
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(defun toc-org-raw-toc ()
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"Return the \"raw\" table of contents of the current file,
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i.e. simply flush everything that's not a heading and strip
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tags."
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(let ((content (buffer-substring-no-properties
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(point-min) (point-max))))
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(with-temp-buffer
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(insert content)
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(goto-char (point-min))
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(keep-lines "^\*+[ ]")
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;; don't include the TOC itself
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(goto-char (point-min))
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(re-search-forward toc-org-toc-org-regexp nil t)
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(beginning-of-line)
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(delete-region (point) (progn (forward-line 1) (point)))
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;; strip states
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(goto-char (point-min))
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(while (re-search-forward toc-org-states-regexp nil t)
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(replace-match "" nil nil nil 1))
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;; strip tags
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;; TODO :export: and :noexport: tags semantic should be probably
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;; implemented
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(goto-char (point-min))
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(while (re-search-forward toc-org-tags-regexp nil t)
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(replace-match "" nil nil))
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;; flatten links
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(goto-char (point-min))
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(while (re-search-forward toc-org-links-regexp nil t)
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(replace-match "\\2" nil nil))
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(buffer-substring-no-properties
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(point-min) (point-max)))))
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(ert-deftest toc-org-test-raw-toc ()
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"Test the `toc-org-raw-toc' function"
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(defun toc-org-test-raw-toc-gold-test (content gold)
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(should (equal
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(with-temp-buffer
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(insert content)
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(toc-org-raw-toc))
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gold)))
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(declare-function toc-org-test-raw-toc-gold-test "toc-org") ;; suppress compiler warning
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(let ((beg "* TODO [[http://somewhere.com][About]]\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n\n* Table of Contents ")
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(gold "* About\n"))
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;; different TOC styles
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC:" ) gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC_1:" ) gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC_1_qqq:" ) gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC@1:" ) gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC@1@cxv:" ) gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC@1_hello:" ) gold)
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;; trailing symbols
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC@1_hello:" "\n\n\n") gold)
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(toc-org-test-raw-toc-gold-test (concat beg ":TOC@1_hello:" "\n\n\nsdfd") gold))
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;; more complex case
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(toc-org-test-raw-toc-gold-test
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"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n\n* Table of Contents :TOC:\n - [[#about][About]]\n - [[#use][Use]]\n - [[#different-href-styles][Different href styles]]\n - [[#example][Example]]\n\n* Installation\n** via package.el\nThis is the simplest method if you have the package.el module\n(built-in since Emacs 24.1) you can simply use =M-x package-install=\nand then put the following snippet in your ~/.emacs file\n#+BEGIN_SRC elisp\n (eval-after-load \"toc-org-autoloads\"\n '(progn\n (if (require 'toc-org nil t)\n (add-hook 'org-mode-hook 'toc-org-enable)\n (warn \"toc-org not found\"))))\n#+END_SRC\n** Manual :Hello:\n- Create folder ~/.emacs.d if you don't have it\n- Go to it and clone toc-org there\n #+BEGIN_SRC sh\n git clone https://github.com/snosov1/toc-org.git\n #+END_SRC\n- Put this in your ~/.emacs file\n #+BEGIN_SRC elisp\n (add-to-list 'load-path \"~/.emacs.d/toc-org\")\n (when (require 'toc-org nil t)\n (add-hook 'org-mode-hook 'toc-org-enable))\n #+END_SRC\n\n* Use\n\nAfter the installation, every time you'll be saving an org file, the\nfirst headline with a :TOC: tag will be updated with the current table\nof contents.\n\nTo add a TOC tag, you can use the command =org-set-tags-command=.\n\nIn addition to the simple :TOC: tag, you can also use the following\ntag formats:\n\n- :TOC@2: - sets the max depth of the headlines in the table of\n contents to 2 (the default)\n\n- :TOC@2@gh: - sets the max depth as in above and also uses the\n GitHub-style hrefs in the table of contents (the default). The other\n supported href style is 'org', which is the default org style (you\n can use C-c C-o to go to the headline at point).\n\nYou can also use =_= as separator, instead of =@=.\n\n* Different href styles\n\nCurrently, only 2 href styles are supported: =gh= and =org=. You can easily\ndefine your own styles. If you use the tag =:TOC@2@STYLE:= (=STYLE= being a\nstyle name), then the package will look for a function named\n=toc-org-hrefify-STYLE=, which accepts a heading string and returns a href\ncorresponding to that heading.\n\nE.g. for =org= style it simply returns input as is:\n\n#+BEGIN_SRC emacs-lisp\n (defun toc-org-hrefify-org (str)\n \"Given a heading, transform it into a href using the org-mode\n rules.\"\n str)\n#+END_SRC\n\n* Example\n\n#+BEGIN_SRC org\n * About\n * Table of Contents :TOC:\n - [[#about][About]]\n - [[#installation][Installation]]\n - [[#via-packageel][via package.el]]\n - [[#manual][Manual]]\n - [[#use][Use]]\n * Installation\n ** via package.el\n ** Manual\n * Use\n * Example\n#+END_SRC\n"
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"* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n"))
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(defun toc-org-hrefify-gh (str)
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"Given a heading, transform it into a href using the GitHub
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rules."
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(let* ((spc-fix (replace-regexp-in-string " " "-" str))
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(upcase-fix (replace-regexp-in-string "[A-Z]" 'downcase spc-fix t))
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(special-chars-fix (replace-regexp-in-string toc-org-special-chars-regexp "" upcase-fix t)))
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(concat "#" special-chars-fix)))
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(ert-deftest toc-org-test-hrefify-gh ()
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"Test the `toc-org-hrefify-gh' function"
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(should (equal (toc-org-hrefify-gh "About") "#about"))
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(should (equal (toc-org-hrefify-gh "!h@#$%^&*(){}|][:;\"'/?.>,<`~") "#h"))
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(should (equal (toc-org-hrefify-gh "!h@#$% ^&*(S){}|][:;\"'/?.>,<`~") "#h-s")))
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(defun toc-org-hrefify-org (str)
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"Given a heading, transform it into a href using the org-mode
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rules."
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str)
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(defun toc-org-unhrefify (type path)
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"Looks for a value in toc-org-hrefify-hash using path as a key."
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(let ((ret-type type)
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(ret-path path)
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(original-path (and (not (eq toc-org-hrefify-hash nil))
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(gethash
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(concat
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;; Org 8.3 and above provides type as "custom-id"
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;; and strips the leading hash symbol
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(if (equal type "custom-id") "#" "")
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(substring-no-properties path))
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toc-org-hrefify-hash
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nil))))
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(when toc-org-enable-links-opening
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(when original-path
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;; Org 8.2 and below provides type as "thisfile"
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(when (equal type "thisfile")
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(setq ret-path original-path))
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(when (equal type "custom-id")
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(setq ret-type "fuzzy")
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(setq ret-path original-path))))
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(cons ret-type ret-path)))
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(defun toc-org-hrefify-toc (toc hrefify &optional hash)
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"Format the raw `toc' using the `hrefify' function to transform
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each heading into a link."
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(with-temp-buffer
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(insert toc)
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(goto-char (point-min))
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(while
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(progn
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(when (looking-at "\\*")
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(delete-char 1)
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(while (looking-at "\\*")
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(delete-char 1)
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(insert (make-string
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(+ 2 (or (bound-and-true-p org-list-indent-offset) 0))
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?\s)))
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(skip-chars-forward " ")
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(insert "- ")
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(let* ((beg (point))
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(end (line-end-position))
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(heading (buffer-substring-no-properties
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beg end))
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(hrefified (funcall hrefify heading)))
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(insert "[[")
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(insert hrefified)
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(insert "][")
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(end-of-line)
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(insert "]]")
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;; maintain the hash table, if provided
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(when hash
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(puthash hrefified heading hash)))
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(= 0 (forward-line 1)))))
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(buffer-substring-no-properties
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(point-min) (point-max))))
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(ert-deftest toc-org-test-hrefify-toc ()
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(let ((hash (make-hash-table :test 'equal)))
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(should (equal (toc-org-hrefify-toc "* About\n" 'upcase hash)
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" - [[ABOUT][About]]\n"))
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(should (equal (gethash "ABOUT" hash) "About")))
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(let ((hash (make-hash-table :test 'equal)))
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(should (equal (toc-org-hrefify-toc "* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n" 'upcase hash)
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" - [[ABOUT][About]]\n - [[INSTALLATION][Installation]]\n - [[VIA PACKAGE.EL][via package.el]]\n - [[MANUAL][Manual]]\n - [[USE][Use]]\n - [[DIFFERENT HREF STYLES][Different href styles]]\n - [[EXAMPLE][Example]]\n"))
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(should (equal (gethash "ABOUT" hash) "About"))
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(should (equal (gethash "INSTALLATION" hash) "Installation"))
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(should (equal (gethash "VIA PACKAGE.EL" hash) "via package.el"))
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(should (equal (gethash "MANUAL" hash) "Manual"))
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(should (equal (gethash "USE" hash) "Use"))
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(should (equal (gethash "DIFFERENT HREF STYLES" hash) "Different href styles"))
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(should (equal (gethash "EXAMPLE" hash) "Example"))))
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(defun toc-org-flush-subheadings (toc max-depth)
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"Flush subheadings of the raw `toc' deeper than `max-depth'."
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(with-temp-buffer
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(insert toc)
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(goto-char (point-min))
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(let ((re "^"))
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(dotimes (i (1+ max-depth))
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(setq re (concat re "\\*")))
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(flush-lines re))
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(buffer-substring-no-properties
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(point-min) (point-max))))
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(ert-deftest toc-org-test-flush-subheadings ()
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(should (equal (toc-org-flush-subheadings "* About\n" 0)
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""))
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(should (equal (toc-org-flush-subheadings "* About\n" 1)
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"* About\n"))
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(should (equal (toc-org-flush-subheadings "* About\n" 2)
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"* About\n"))
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(should (equal (toc-org-flush-subheadings "* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n" 0)
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""))
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(should (equal (toc-org-flush-subheadings "* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n" 1)
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"* About\n* Installation\n* Use\n* Different href styles\n* Example\n"))
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(should (equal (toc-org-flush-subheadings "* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n" 2)
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"* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n"))
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(should (equal (toc-org-flush-subheadings "* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n" 3)
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"* About\n* Installation\n** via package.el\n** Manual\n* Use\n* Different href styles\n* Example\n")))
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(defun toc-org-insert-toc (&optional dry-run)
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"Looks for a headline with the TOC tag and updates it with the
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current table of contents.
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If optional second argument DRY-RUN is provided, then the buffer
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is not modified at all. Only the internal hash-table is updated
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to enable `org-open-at-point' for TOC links.
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To add a TOC tag, you can use the command
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`org-set-tags-command' (C-c C-q).
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In addition to the simple :TOC: tag, you can also use the
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following tag formats:
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- :TOC_2: - sets the max depth of the headlines in the table of
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contents to 2 (the default)
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- :TOC_2_gh: - sets the max depth as in above and also uses the
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GitHub-style hrefs in the table of contents (this style is
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default). The other supported href style is 'org', which is the
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default org style."
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(interactive)
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(when (eq major-mode 'org-mode)
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(save-excursion
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(goto-char (point-min))
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(let ((case-fold-search t))
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;; find the first heading with the :TOC: tag
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(when (re-search-forward toc-org-toc-org-regexp (point-max) t)
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(let* ((tag (match-string 1))
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(depth (if tag
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(- (aref tag 1) ?0) ;; is there a better way to convert char to number?
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toc-org-max-depth))
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(hrefify-tag (if (and tag (>= (length tag) 4))
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(downcase (substring tag 3))
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toc-org-hrefify-default))
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(hrefify-string (concat "toc-org-hrefify-" hrefify-tag))
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(hrefify (intern-soft hrefify-string)))
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(if hrefify
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(let ((new-toc
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(toc-org-hrefify-toc
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(toc-org-flush-subheadings (toc-org-raw-toc) depth)
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hrefify
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(when toc-org-hrefify-hash
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(clrhash toc-org-hrefify-hash)))))
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(unless dry-run
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(newline (forward-line 1))
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;; insert newline if TOC is currently empty
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(when (looking-at "^\\*")
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(open-line 1))
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;; find TOC boundaries
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(let ((beg (point))
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(end
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(save-excursion
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(when (search-forward-regexp "^\\*" (point-max) t)
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(forward-line -1))
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(end-of-line)
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(point))))
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;; update the TOC, but only if it's actually different
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;; from the current one
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(unless (equal
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(buffer-substring-no-properties beg end)
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new-toc)
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(delete-region beg end)
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(insert new-toc)))))
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(message (concat "Hrefify function " hrefify-string " is not found")))))))))
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;;;###autoload
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(defun toc-org-enable ()
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"Enable toc-org in this buffer."
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(add-hook 'before-save-hook 'toc-org-insert-toc nil t)
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;; conservatively set org-link-translation-function
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(when (and (equal toc-org-enable-links-opening t)
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(or
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(not (fboundp org-link-translation-function))
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(equal org-link-translation-function 'toc-org-unhrefify)))
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(setq toc-org-hrefify-hash (make-hash-table :test 'equal))
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(setq org-link-translation-function 'toc-org-unhrefify)
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(toc-org-insert-toc t)))
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(ert-deftest toc-org-test-insert-toc ()
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"Test the `toc-org-insert-toc' function"
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(defun toc-org-test-insert-toc-gold-test (content gold)
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(with-temp-buffer
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(org-mode)
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(insert content)
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(toc-org-raw-toc)
|
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(toc-org-insert-toc)
|
||
(should (equal
|
||
(buffer-substring-no-properties
|
||
(point-min) (point-max))
|
||
gold))))
|
||
(declare-function toc-org-test-insert-toc-gold-test "toc-org") ;; suppress compiler warning
|
||
|
||
(let ((beg "* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents "))
|
||
(toc-org-test-insert-toc-gold-test
|
||
(concat beg ":TOC:")
|
||
"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents :TOC:\n - [[#about][About]]\n - [[#hello][Hello]]\n - [[#good-bye][Good-bye]]\n")
|
||
|
||
(toc-org-test-insert-toc-gold-test
|
||
(concat beg ":TOC_1:")
|
||
"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents :TOC_1:\n - [[#about][About]]\n - [[#hello][Hello]]\n")
|
||
|
||
(toc-org-test-insert-toc-gold-test
|
||
(concat beg ":TOC_3:")
|
||
"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents :TOC_3:\n - [[#about][About]]\n - [[#hello][Hello]]\n - [[#good-bye][Good-bye]]\n - [[#salut][Salut]]\n")
|
||
|
||
(toc-org-test-insert-toc-gold-test
|
||
(concat beg ":TOC_1_org:")
|
||
"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents :TOC_1_org:\n - [[About][About]]\n - [[Hello][Hello]]\n")
|
||
|
||
(toc-org-test-insert-toc-gold-test
|
||
(concat beg ":TOC_3_org:")
|
||
"* About\n:TOC:\n drawer\n:END:\n\ntoc-org is a utility to have an up-to-date table of contents in the\norg files without exporting (useful primarily for readme files on\nGitHub).\n\nIt is similar to the [[https://github.com/ardumont/markdown-toc][markdown-toc]] package, but works for org files.\n:TOC:\n drawer\n:END:\n* Hello\n** Good-bye\n*** Salut\n* Table of Contents :TOC_3_org:\n - [[About][About]]\n - [[Hello][Hello]]\n - [[Good-bye][Good-bye]]\n - [[Salut][Salut]]\n")))
|
||
|
||
;; Local Variables:
|
||
;; compile-command: "emacs -batch -l ert -l *.el -f ert-run-tests-batch-and-exit && emacs -batch -f batch-byte-compile *.el 2>&1 | sed -n '/Warning\|Error/p' | xargs -r ls"
|
||
;; End:
|
||
|
||
(provide 'toc-org)
|
||
;;; toc-org.el ends here
|