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nano-writer.el
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nano-writer.el
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;; ---------------------------------------------------------------------
;; GNU Emacs / N Λ N O - Emacs made simple
;; Copyright (C) 2020 - N Λ N O developers
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;; ---------------------------------------------------------------------
(require 'org)
(require 'org-indent)
(require 'org-element)
(require 'nano-base-colors)
(require 'nano-faces)
;;
;; prefix
;; |<------>|
;; border -> |<------>| * Headline level 1 # Unnumbered
;; |<------>| 1 Headline level 1 # Numbered
;;
;; |<----->| ** Headline level 2 # Unnumbered
;; |<---->| 1.1 Headline level 2 # Numbered
;;
;; |<---->| *** Headline level 3 # Unumbered
;; |<-->| 1.1.1 Headline level 3 # Numbered
;; etc.
;;
;; This works if the number of sections at a given level is < 10.
(defun writer-mode--num-format (numbering)
"Alternative numbering format for org-num.
First level: 1 | xxx
Second level: 1.1 — xxx
Third level: 1.1.1 - xxx
etc.
"""
(if (= (length numbering) 1)
(propertize (concat (mapconcat
#'number-to-string
numbering ".") " | " )
'face `(:family "Roboto Condensed"
:height 250
:foreground ,nano-color-faded))
(propertize (concat (mapconcat
#'number-to-string
numbering ".") " — " )
'face `(:family "Roboto Condensed"
:foreground ,nano-color-faded))))
;; Specific face for headline stars
(font-lock-add-keywords 'writer-mode
'(("^*+ " 0 `(:family "Roboto Mono"
:height 140
:foreground ,nano-color-faded) prepend)
) 'append)
(defun writer-mode--compute-prefixes ()
"Compute prefix strings for regular text and headlines."
(setq org-indent--heading-line-prefixes
(make-vector org-indent--deepest-level nil))
(setq org-indent--inlinetask-line-prefixes
(make-vector org-indent--deepest-level nil))
(setq org-indent--text-line-prefixes
(make-vector org-indent--deepest-level nil))
(let* ((min-indent 5)
(indent (+ 1 (seq-max
(org-element-map
(org-element-parse-buffer) 'headline
#'(lambda (item)
(org-element-property :level item))))))
(indent (max indent min-indent)))
(dotimes (n org-indent--deepest-level)
(aset org-indent--heading-line-prefixes n
(make-string
(min indent (max 0 (- indent 1 n))) ?\s))
(aset org-indent--inlinetask-line-prefixes n
(make-string indent ?\s))
(aset org-indent--text-line-prefixes n
(make-string indent ?\s)))))
;;;###autoload
(define-derived-mode writer-mode org-mode "NΛNO writer"
;; Faces
(face-remap-add-relative 'org-level-1
:overline nano-color-subtle
:family "Roboto" :height 180)
(face-remap-add-relative 'org-level-2
:family "Roboto" :height 160)
(face-remap-add-relative 'org-level-3
:family "Roboto" :height 150)
(face-remap-add-relative 'org-document-info
:inherit 'nano-face-faded)
(face-remap-add-relative 'org-document-title
:foreground nano-color-foreground
:family "Roboto Slab"
:height 200
:weight 'medium)
;; hide title / author ... keywords
(setq-local org-hidden-keywords '(title author date startup))
;; Header line
(setq header-line-format nil)
;; Layout
(setq fill-column 72)
(setq-default line-spacing 1)
;; Indentation
(setq org-startup-folded nil)
(org-indent-mode)
(setq org-level-color-stars-only nil)
(setq org-hide-leading-stars nil)
(advice-add 'org-indent--compute-prefixes :override
#'writer-mode--compute-prefixes)
;; Numbering
(when (require 'org-num nil t)
(setq org-num-skip-unnumbered t)
(setq org-num-skip-footnotes t)
(setq org-num-max-level 2)
(setq org-num-face nil)
(org-num-mode)
(setq org-num-format-function 'writer-mode--num-format)))
(provide 'nano-writer)