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+;;; sisu-spine-mode.el --- Major mode for SiSU (spine parser) markup text
+
+;; Copyright (C) 2011, 2021 Free Software Foundation, Inc.
+
+;; Author: Ralph Amissah & Ambrose Kofi Laing
+;; Maintainer: Ralph Amissah <ralph.amissah@gmail.com>
+;; Keywords: text, syntax, processes, tools
+;; Version: 8.0.0
+;; URL: https://www.sisudoc.org/
+;; originally looked at (based on) doc-mode, with kind permission of the author
+;; Author: SUN, Tong <suntong001@users.sf.net>, (c)2001-6, all right reserved
+;; Version: $Date: 2006/01/19 03:13:41 $ $Revision: 1.14 $
+;; Home URL: https://xpt.sourceforge.net/
+;; with contributions from Kevin Ryde and Stefan Monnier
+
+;; 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, 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 <https://www.gnu.org/licenses/>.
+
+;; Viva Software Libre!
+;; Support the free software movement!
+;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;; Commentary:
+
+;; SiSU (https://www.sisudoc.org/) is a document structuring and
+;; publishing framework. This package provides an Emacs major mode
+;; for SiSU markup, as used by the spine parser (in D) which has a different
+;; header (based on yaml) from the original sisu parser (in Ruby) which has
+;; bespoke headers.
+
+;; When this package is installed, files ending in ".sst" are automatically
+;; associated with sisu-spine-mode. If a file doesn't have a
+;; .sst extension, add a first line:
+;; # -*- sisuSpine -*-
+
+;; The documentation for the "Structure Of The Hierarchy Text" can be
+;; found in the sisustring for the sisu-spine-mode function.
+
+;;; Code:
+
+;; Variables:
+
+(defgroup sisu-faces nil
+ "AsciiSisu highlighting"
+ :group 'sisus)
+
+;; == Colors
+; color n is more prominent than color n+1
+
+(defface sisu-title-1-face
+ `((((class color)
+ (background dark))
+ (:foreground "brown3" :bold t :height 1.2 :inherit variable-pitch))
+ (((class color)
+ (background light))
+ (:foreground "brown3" :bold t :height 1.2 :inherit variable-pitch))
+ (t (:weight bold :inherit variable-pitch)))
+ "Face for AsciiSisu titles at level 1."
+ :group 'sisu-faces)
+
+(defface sisu-title-2-face
+ `((((class color)
+ (background dark))
+ (:foreground "yellow4" :bold t :height 1.1 :inherit variable-pitch))
+ (((class color)
+ (background light))
+ (:foreground "yellow4" :bold t :height 1.1 :inherit variable-pitch))
+ (t (:weight bold :inherit variable-pitch)))
+ "Face for AsciiSisu titles at level 2."
+ :group 'sisu-faces)
+
+(defface sisu-title-3-face
+ `((((class color)
+ (background dark))
+ (:foreground "sienna3" :bold t))
+ (((class color)
+ (background light))
+ (:foreground "sienna3" :bold t))
+ (t (:weight bold)))
+ "Face for AsciiSisu titles at level 3."
+ :group 'sisu-faces)
+
+(defface sisu-title-4-face
+ `((((class color)
+ (background dark))
+ (:foreground "burlywood3"))
+ (((class color)
+ (background light))
+ (:foreground "burlywood3"))
+ (t ()))
+ "Face for AsciiSisu titles at level 4."
+ :group 'sisu-faces)
+
+(defface info-node
+ '((((class color) (background light)) (:foreground "brown" :bold t :italic t))
+ (((class color) (background dark)) (:foreground "white" :bold t :italic t))
+ (t (:bold t :italic t)))
+ "Face for Info node names."
+ :group 'sisu-faces)
+
+(defvar sisu-title-1 'sisu-title-1-face)
+(defvar sisu-title-2 'sisu-title-2-face)
+(defvar sisu-title-3 'sisu-title-3-face)
+(defvar sisu-title-4 'sisu-title-4-face)
+
+(defvar sisu-general-font-lock-red1 font-lock-warning-face)
+(defvar sisu-general-font-lock-red2 font-lock-comment-face)
+(defvar sisu-general-font-lock-red3 font-lock-string-face)
+
+(defvar sisu-general-font-lock-green1 font-lock-type-face)
+(defvar sisu-general-font-lock-green2 font-lock-constant-face)
+
+(defvar sisu-general-font-lock-blue1 font-lock-keyword-face)
+(defvar sisu-general-font-lock-blue2 font-lock-function-name-face)
+(defvar sisu-general-font-lock-blue3 font-lock-builtin-face)
+
+(defvar sisu-general-font-lock-yellow1 font-lock-variable-name-face)
+(defvar sisu-general-font-lock-yellow2 font-lock-comment-face)
+
+;; == sisu-spine-mode settings
+
+(defvar sisu-spine-mode-hook nil
+ "Normal hook run when entering Sisu Text mode.")
+
+(defvar sisu-spine-mode-abbrev-table nil
+ "Abbrev table in use in Sisu-spine-mode buffers.")
+(define-abbrev-table 'sisu-spine-mode-abbrev-table ())
+
+(defconst sisu-font-lock-keywords
+ (eval-when-compile
+ (list
+ ;;grouped text ---------
+ ;(cons "^```[ ]code\\(.\\|\n\\)+?\n```\n" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+code.*?$\\|^```$" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+table.*?$\\|^```$" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+group$\\|^```$" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+block$\\|^```$" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+poem$\\|^```$" 'sisu-general-font-lock-red2)
+ (cons "^```[ ]+alt$\\|^```$" 'sisu-general-font-lock-red2)
+ ;;grouped text ---------
+ (cons "^group{\\|^}group" 'sisu-general-font-lock-red2)
+ (cons "^block{\\|^}block" 'sisu-general-font-lock-red2)
+ (cons "^code{\\|^}code" 'sisu-general-font-lock-red2)
+ (cons "^poem{\\|^}poem" 'sisu-general-font-lock-red2)
+ (cons "^alt{\\|^}alt" 'sisu-general-font-lock-red2)
+ (cons "^table{.+\\|^}table" 'sisu-general-font-lock-red2)
+ (cons "^{table[^}]+}" 'sisu-general-font-lock-red2)
+
+ (list
+ (concat
+ "^\`\\{3\\}[ ]+code.*?$"
+ "\\(.\\|\n\\)+?"
+ "\`\\{3\\}$"
+ )
+ '(1 sisu-general-font-lock-red2 t)
+ '(2 nil t)
+ '(3 sisu-general-font-lock-red2 t)
+ )
+ (list
+ (concat
+ "^\`\\{3\\}[ ]+table.*?$"
+ "\\(.\\|\n\\)+?"
+ "\`\\{3\\}$"
+ )
+ '(1 sisu-general-font-lock-red2 t)
+ '(2 nil t)
+ '(3 sisu-general-font-lock-red2 t)
+ )
+ (list
+ (concat
+ "^\`\\{3\\}[ ]+\\(group\\|block\\|alt\\|poem\\)$"
+ "\\(.\\|\n\\)+?"
+ "^\`\\{3\\}$"
+ )
+ '(1 sisu-general-font-lock-red2 t)
+ '(2 nil t)
+ '(3 sisu-general-font-lock-red2 t)
+ )
+
+ ;; footnote/endnote ----
+ ;(cons "\~{.+?}\~" 'sisu-general-font-lock-green1)
+ (cons "\~{\\*\\*\\|\~{\\*\\|\~{\\|}\~" 'sisu-general-font-lock-red2)
+ (cons "\~\\[\\+\\|\~\\[\\*\\|\~\\[\\|\\]\~" 'sisu-general-font-lock-red2)
+ (cons "\~\\^ \\|^\\^\~ " 'sisu-general-font-lock-red2)
+ (list
+ (concat
+ "\\(\*\~\\)"
+ "\\([^ \r\t\n]+\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-blue2 t)
+ )
+
+ ;; emphasis (can be program configured to be bold italics or underscore)
+ (list
+ (concat
+ "\\([*]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[*]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; bold ----------------
+ (list
+ (concat
+ "\\([!]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[!]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+ (cons "\\*[^ ]+\\*" 'sisu-general-font-lock-red1)
+ (cons "^!_ .+" 'sisu-general-font-lock-red1)
+
+ ;; italics -------------
+ (list
+ (concat
+ "\\([/]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[/]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-blue1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; underscore ----------
+ (list
+ (concat
+ "\\([_]{\\)"
+ "\\([^}]+\\)"
+ "\\(\}[_]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; monospace -----------
+ (list
+ (concat
+ "\\([#]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[#]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; citation ------------
+ (list
+ (concat
+ "\\([\"]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[\"]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; inserted text -------
+ (list
+ (concat
+ "\\([\+]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[\+]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; strike through ------
+ (list
+ (concat
+ "\\(\\-{\\)"
+ "\\([^}]+\\)"
+ "\\(}\\-\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; superscript ---------
+ (list
+ (concat
+ "\\(\\^{\\)"
+ "\\([^}]+\\)"
+ "\\(}\\^\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; subscript -----------
+ (list
+ (concat
+ "\\([,]{\\)"
+ "\\([^}]+\\)"
+ "\\(}[,]\\)"
+ )
+ '(1 sisu-general-font-lock-red1 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-red1 t)
+ )
+
+ ;; numbered list
+ (cons "^# \\|^_# " 'sisu-general-font-lock-red1)
+
+ ;; bullet text
+ (cons "^_\\*[1-9] \\|^_\\* " 'sisu-general-font-lock-red1)
+
+ ;; indented text
+ (cons "^_[1-9] " 'sisu-general-font-lock-red1)
+ (cons "^_[1-9]! " 'sisu-general-font-lock-red1)
+
+ ;; hanging indented text [proposed enable when implemented]
+ (cons "^__[1-9] " 'sisu-general-font-lock-red1)
+ (cons "^_[0-9]_[0-9] " 'sisu-general-font-lock-red1)
+ (cons "^__[1-9]! " 'sisu-general-font-lock-red1)
+ (cons "^_[0-9]_[0-9]! " 'sisu-general-font-lock-red1)
+
+ ;; url
+ (cons "\\(^\\|[ ]\\)https?:[/][/][^ \t\n\r<]+" 'sisu-general-font-lock-blue2)
+
+ ;; Comment Lines
+ (cons "^% .*" 'sisu-general-font-lock-blue1)
+
+ ;; page break
+ (cons "^\\(-\\\\\\\\-\\|=\\\\\\\\=\\|-\\.\\.-\\)" 'sisu-general-font-lock-red2)
+
+ ;; line break
+ (cons " \\\\\\\\ " 'sisu-general-font-lock-red1)
+
+ ;; line break (depreciated)
+ (cons "<br>" 'sisu-general-font-lock-red1)
+
+ ;; Section titles
+ (list "^\\(\\([1-4]\\|:?[A-D]\\)\\~\\)\\(.*\\)"
+ '(1 sisu-title-1 t)
+ '(3 sisu-title-2 t)
+ )
+
+ ;; hyper-links
+ (list
+ (concat
+ "\\({~^\\|{\\)"
+ "\\([^}{]+\\)"
+ "\\(}https?:[/][/][^ \r\n\t<]+\\)"
+ )
+ '(1 sisu-general-font-lock-blue2 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-blue2 t)
+ )
+
+ ;; book index
+ (list
+ (concat
+ "^\\(\={\\)"
+ "\\([^}{]+\\)"
+ "\\(}\\)$"
+ )
+ '(1 sisu-general-font-lock-green1 t)
+ '(2 nil t)
+ '(3 sisu-general-font-lock-green1 t)
+ )
+
+ ;(cons "^\={.+}" 'sisu-general-font-lock-green1)
+
+ ;; numbers
+ (cons "\\<[.0-9]+\\>" 'sisu-general-font-lock-green2)
+
+ ;; bullets sisu_normal (nearly copied regexp)
+ (cons "^_\\([1-9*]\\|[1-9]\\*\\) " 'sisu-general-font-lock-blue2)
+
+ ;; image links
+ (list
+ (concat
+ "\\({\\)"
+ "\\([^}{]+\\)"
+ "\\(}image\\)"
+ )
+ '(1 sisu-general-font-lock-blue2 t)
+ '(2 sisu-general-font-lock-red1 t)
+ '(3 sisu-general-font-lock-blue2 t)
+ )
+
+ ;; insert file links
+ (list
+ (concat
+ "\\(<< \\)"
+ "\\([^ \r\t\n]+\\.ss\\)"
+ "\\(i\\|t\\)"
+ )
+ '(1 sisu-general-font-lock-blue2 t)
+ '(2 sisu-general-font-lock-blue2 t)
+ '(3 sisu-general-font-lock-blue2 t)
+ )
+
+ ;; raw keywords
+ (list
+ (concat
+ "^\\(\\("
+ "creator\\|"
+ "title\\|"
+ "date\\|"
+ "rights\\|"
+ "publisher\\|"
+ "classify\\|"
+ "identifier\\|"
+ "original\\|"
+ "notes\\|"
+ "links\\|"
+ "make\\|"
+ "\\):\\)\\(.*\\)"
+ )
+ '(1 sisu-title-2 keep)
+ '(3 sisu-title-3 keep)
+ )
+ )
+ )
+ "Default expressions to highlight in AsciiSisu mode."
+)
+
+;; outline mode evil "folding" if available
+;; (define-key evil-normal-state-map ",0" 'show-all)
+;; (define-key evil-normal-state-map ",-" 'hide-body)
+;; (define-key evil-normal-state-map ",+" 'show-subtree)
+;; (define-key evil-normal-state-map ",=" 'show-subtree)
+
+;;
+
+;; Sisu & Autoload:
+
+;;;###autoload
+(define-derived-mode sisu-spine-mode text-mode "SiSU"
+ "Major mode for editing SiSU files.
+SiSU document structuring, publishing in multiple formats and search.
+URL `https://www.sisudoc.org/'"
+ (modify-syntax-entry ?\' ".")
+ ;;(flyspell-mode nil)
+
+ (make-local-variable 'paragraph-start)
+ (setq paragraph-start (concat "$\\|>" page-delimiter))
+ (make-local-variable 'paragraph-separate)
+ (setq paragraph-separate paragraph-start)
+ (make-local-variable 'paragraph-ignore-fill-prefix)
+ (setq paragraph-ignore-fill-prefix t)
+
+ (set (make-local-variable 'outline-regexp)
+ "^\\(\\([1-4]\\|:?[A-D]\\)\\~\\|\\@[a-z]+:\\( \\|$\\)\\)")
+
+ (make-local-variable 'require-final-newline)
+ (setq require-final-newline t)
+
+ (make-local-variable 'font-lock-defaults)
+ (setq font-lock-defaults
+ '(sisu-font-lock-keywords
+ nil ; KEYWORDS-ONLY: no
+ nil ; CASE-FOLD: no
+ ((?_ . "w")) ; SYNTAX-ALIST
+ ))
+ ;; Enable outlining.
+ ;; TODO with outlining make sure linum (line numbering) is off,
+ ;; else performance penalty, sucks bigtime
+ (outline-minor-mode 1))
+
+;;;###autoload (add-to-list 'auto-mode-alist '("\\.ss[imt]\\'" . sisu-spine-mode))
+
+(provide 'sisu-spine-mode)
+
+;;
+
+;;; sisu-spine-mode.el ends here