hamacs/ha-org-word-processor.org

#+TITLE:  Org As A Word Processor
#+AUTHOR: Howard X. Abrams
#+DATE:   2020-09-10
#+FILETAGS: :emacs:

A literate programming file for making Org file more readable.
# *Note:* After each change, /tangle it/ to the source destination with ~C-c C-v t~.

#+BEGIN_SRC emacs-lisp :exports none
;;; ha-org-word-processor.org --- A literate programming file for making Org file more readable. -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2020 Howard X. Abrams
;;
;; Author: Howard X. Abrams <http://gitlab.com/howardabrams>
;; Maintainer: Howard X. Abrams
;; Created: September 10, 2020
;;
;; This file is not part of GNU Emacs.
;;
;; *NB:* Do not edit this file. Instead, edit the original literate file at:
;;           ~/other/hamacs/ha-org-word-processor.org
;;       Using `find-file-at-point', and tangle the file to recreate this one .
;;
;;; Code:
#+END_SRC
* Introduction
I like having org-mode files look more like editing in a word processor than having it look like programming code. But that is just me.
* General Org Settings
Since I use ellipsis in my writing... I like to /change/ how org renders a collapsed heading.

#+BEGIN_SRC emacs-lisp
  (setq org-pretty-entities t
        org-ellipsis "⤵"     ; …, ➡, ⚡, ▼, ↴, , ∞, ⬎, ⤷, ⤵
        org-agenda-breadcrumbs-separator " ❱ "
        org-src-fontify-natively t ;; Pretty code blocks
        org-hide-emphasis-markers t)
#+END_SRC
* Org Beautify
I really want to use the Org Beautify package, but it overrides my darker themes (and all I really want is headlines to behave).

First step is to make all Org header levels to use the variable font, and be the same color as the default text:

#+BEGIN_SRC emacs-lisp
(when window-system
  (let ((default-color (face-attribute 'default :foreground)))
    (dolist (face '(org-level-1 org-level-2 org-level-3 org-level-4 org-level-5 org-level-6 org-level-7 org-level-8))
      (set-face-attribute face nil
                          :foreground default-color :weight 'bold :font ha-variable-font))))
#+END_SRC

Next, we just need to change the header sizes:

#+BEGIN_SRC emacs-lisp
(when window-system
  (set-face-attribute 'org-level-1 nil :height 2.2 :inherit 'default)
  (set-face-attribute 'org-level-2 nil :height 1.8 :inherit 'default)
  (set-face-attribute 'org-level-3 nil :height 1.4 :inherit 'default)
  (set-face-attribute 'org-level-4 nil :height 1.1 :inherit 'default))
#+END_SRC
* Superstar
Now that headers are noticeable, I have no reason to see a number of asterisks. Once I used the [[https://github.com/sabof/org-bullets][org-bullets]] package, but believe we've replaced it with [[https://github.com/integral-dw/org-superstar-mode][org-superstar-mode]], so the following is an improvement, especially with the sub-bullets:

#+BEGIN_SRC emacs-lisp
  (use-package org-superstar
    :after org
    :straight (:type git :protocol ssh :host github :repo "integral-dw/org-superstar-mode")
    :hook (org-mode . org-superstar-mode)
    :init
    (setq org-superstar-headline-bullets-list '("▶")
          org-superstar-special-todo-items nil
          org-superstar-todo-bullet-alist t
          org-superstar-prettify-item-bullets t
          org-superstar-item-bullet-alist '((42 . "⊙")   ; *
                                            (43 . "⁍")   ; +
                                            (45 . "•"))))
#+END_SRC

If this works, then we get the prettier bulleted list:

  * Top bullets
  * Plus bullets:
      + Apples
      + Oranges
      + Bananas
  * Minus bullets:
      - Dogs
      - Cats
      - Birds

Oh, and as I indent lists, they should change the /bulleting/ in a particular sequence. If I begin with an =*= asterisk, I walk down the chain, but with the dashed bullets (my default choice), I just stay with dashed bullets. Numeric bullets should cycle:

#+BEGIN_SRC emacs-lisp
(setq org-list-demote-modify-bullet '(("*" . "+") ("+" . "-") ("-" . "-")
                                      ("1." . "a.") ("a." . "1.")))
#+END_SRC

Since the following code does not work like I would have expected:
#+BEGIN_SRC emacs-lisp :tangle no
(setq org-hide-leading-stars t)
#+END_SRC

I add a hook to standard Org, and since this is a Lisp-2, I can get away with:
#+BEGIN_SRC emacs-lisp
(defun org-hide-leading-stars ()
  (let* ((keyword
          `(("^\\(\\*+ \\)\\s-*\\S-" ; Do not hide empty headings!
             (1 (put-text-property (match-beginning 1) (match-end 1) 'invisible t)
                nil)))))
    (font-lock-add-keywords nil keyword)))

  (add-hook 'org-mode-hook 'org-hide-leading-stars)
#+END_SRC
* Checkboxes
According to an idea by [[https://jft.home.blog/2019/07/17/use-unicode-symbol-to-display-org-mode-checkboxes/][Huy Trần]], we can prettify the list checkboxes as well:

#+BEGIN_SRC emacs-lisp
(defun ha-org-prettify-checkboxes ()
  "Beautify Org Checkbox Symbol"
  (push '("[ ]" . "☐") prettify-symbols-alist)
  (push '("[X]" . "☒") prettify-symbols-alist)
  (push '("[-]" . "☐-") prettify-symbols-alist)
  (prettify-symbols-mode))
#+END_SRC

And now we can attach it to a newly loaded org files:

#+BEGIN_SRC emacs-lisp
(add-hook 'org-mode-hook 'ha-org-prettify-checkboxes)
#+END_SRC

To make it more distinguishable, he also changed the colors:

#+BEGIN_SRC emacs-lisp
(defface org-checkbox-done-text
  '((t (:foreground "#71696A" :strike-through t)))
  "Face for the text part of a checked org-mode checkbox.")

(font-lock-add-keywords
 'org-mode
 `(("^[ \t]*\\(?:[-+*]\\|[0-9]+[).]\\)[ \t]+\\(\\(?:\\[@\\(?:start:\\)?[0-9]+\\][ \t]*\\)?\\[\\(?:X\\|\\([0-9]+\\)/\\2\\)\\][^\n]*\n\\)"
    1 'org-checkbox-done-text prepend))
 'append)
#+END_SRC
* Padding
The [[https://github.com/TonCherAmi/org-padding][org-padding]] project looks places extra space before and after headers and blocks (essentially leading), to create a more word-processor-y experience. Great idea, however, I have spent a lot of extra time entering blank lines before and after my headers and blocks:

#+BEGIN_SRC emacs-lisp
(use-package org-padding
  :straight (:type git :protocol ssh :host github :repo "TonCherAmi/org-padding")
  :hook
  (org-mode . org-padding-mode)
  :config
  (setq org-padding-block-begin-line-padding '(0.5 . 0.3)
        org-padding-block-end-line-padding '(0.1 . 0.5)
        org-padding-heading-padding-alist
        '((4.0 . 1.5) (3.0 . 0.5) (3.0 . 0.5) (3.0 . 0.5) (2.5 . 0.5) (2.0 . 0.5) (1.5 . 0.5) (0.5 . 0.5))))
#+END_SRC
However, I'm just going to have to write a function to clean this.
#+BEGIN_SRC emacs-lisp
(defun ha-remove-superfluous-org-padding ()
  (interactive)
  (goto-char (point-min))
  (ha-remove-org-header-padding)
  (goto-char (point-min))
  (ha-remove-org-block-padding))

(defun ha-remove-org-header-padding ()
  ;; (goto-char (point-min))
  (while (re-search-forward (rx (optional bol (zero-or-more space) eol "\n")
                                (group bol (one-or-more "*") (one-or-more space) (one-or-more any) "\n")
                                (optional bol (zero-or-more space) eol "\n")) nil t)
    (replace-match (match-string 1) nil :no-error)))

(defun ha-remove-org-block-padding ()
  ;; (goto-char (point-min))
  (while (re-search-forward (rx (optional bol (zero-or-more space) eol "\n")
                                (group bol (zero-or-more space) "#+BEGIN" (one-or-more any) eol "\n"
                                       (zero-or-more (group bol (zero-or-more any) eol "\n"))
                                       bol (zero-or-more space) "#+END" (zero-or-more any) eol "\n")
                                (optional bol (zero-or-more space) eol "\n")) nil t)
    (replace-match (match-string 1) nil :no-error)))
#+END_SRC
Now that is some complicated regular expressions.
* Pasting
I like the idea that I will paste HTML text from the clipboard and have it converted to org-formatted text:
#+BEGIN_SRC emacs-lisp :results silent
(defun ha-org-paste ()
  (interactive)
  (if (eq system-type 'gnu/linux)
      (shell-command "xclip -t text/html -o | pandoc -r html -w org" t)))
#+END_SRC
* Presentations
The [[https://github.com/takaxp/org-tree-slide][org-tree-slide]] still seems to be the best presentation tool for Org files, but I really need to issue a pull request to fix a few warnings.
#+BEGIN_SRC emacs-lisp
(use-package org-tree-slide
    :init
    (setq org-tree-slide-skip-outline-level 4)
    :config
    (org-tree-slide-simple-profile))
#+END_SRC
* Technical Artifacts                                :noexport:
Let's provide a name so that the file can be required:
#+BEGIN_SRC emacs-lisp :exports none
(provide 'ha-org-word-processor)
;;; ha-org-word-processor.el ends here
#+END_SRC
Before you can build this on a new system, make sure that you put the cursor over any of these properties, and hit: ~C-c C-c~

#+DESCRIPTION: A literate programming file for making Org file more readable.

#+PROPERTY:    header-args:sh :tangle no
#+PROPERTY:    header-args:emacs-lisp :tangle yes
#+PROPERTY:    header-args    :results none   :eval no-export   :comments no

#+OPTIONS:     num:nil toc:nil todo:nil tasks:nil tags:nil date:nil
#+OPTIONS:     skip:nil author:nil email:nil creator:nil timestamp:nil
#+INFOJS_OPT:  view:nil toc:nil ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js