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| | ;;; markdown-ts-mode.el --- tree sitter support for Markdown -*- lexical-binding: t; -*-
;; Copyright (C) 2024 Free Software Foundation, Inc.
;; Author : Rahul Martim Juliato <rahul.juliato@gmail.com>
;; Maintainer : Rahul Martim Juliato <rahul.juliato@gmail.com>
;; Created : April 2024
;; Keywords : markdown md languages tree-sitter
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(require 'treesit)
(require 'subr-x)
(declare-function treesit-node-parent "treesit.c")
(declare-function treesit-node-type "treesit.c")
(declare-function treesit-parser-create "treesit.c")
(defvar markdown-ts--treesit-settings
(treesit-font-lock-rules
:language 'markdown
:override t
:feature 'delimiter
'([ "[" "]" "(" ")" ] @shadow)
:language 'markdown
:feature 'paragraph
'([((atx_heading) @font-lock-keyword-face)
((block_quote_marker) @font-lock-string-face)
((code_span) @font-lock-string-face)
((emphasis) @underline)
((image_description) @link)
((indented_code_block) @font-lock-string-face)
((link_destination) @font-lock-string-face)
((setext_heading) @font-lock-keyword-face)
((strong_emphasis) @bold)
((thematic_break) @shadow)
(block_quote (block_quote_marker) @font-lock-string-face)
(block_quote (paragraph) @font-lock-string-face)
(fenced_code_block (code_fence_content) @font-lock-string-face)
(fenced_code_block (fenced_code_block_delimiter) @font-lock-doc-face)
(inline_link (link_destination) @font-lock-string-face)
(inline_link (link_text) @link)
(list_item (list_marker_dot) @font-lock-keyword-face)
(list_item (list_marker_minus) @font-lock-keyword-face)
(list_item (list_marker_plus) @font-lock-keyword-face)
(list_item (list_marker_star) @font-lock-keyword-face)
(shortcut_link (link_text) @link)
])))
(defun markdown-ts-imenu-node-p (node)
"Check if NODE is a valid entry to imenu."
(equal (treesit-node-type (treesit-node-parent node))
"atx_heading"))
(defun markdown-ts-imenu-name-function (node)
"Return an imenu entry if NODE is a valid header."
(let ((name (treesit-node-text node)))
(if (markdown-ts-imenu-node-p node)
(thread-first (treesit-node-parent node)(treesit-node-text))
name)))
(defun markdown-ts-setup ()
"Setup treesit for `markdown-ts-mode'."
(setq-local treesit-font-lock-settings markdown-ts--treesit-settings)
(treesit-major-mode-setup))
;;;###autoload
(define-derived-mode markdown-ts-mode text-mode "Markdown"
"Major mode for editing Markdown using tree-sitter grammar."
(setq-local font-lock-defaults nil
treesit-font-lock-feature-list '((delimiter)
(paragraph)))
(setq-local treesit-simple-imenu-settings
`(("Headings" markdown-ts-imenu-node-p nil markdown-ts-imenu-name-function)))
(when (treesit-ready-p 'markdown)
(treesit-parser-create 'markdown)
(markdown-ts-setup)))
(derived-mode-add-parents 'markdown-ts-mode '(markdown-mode))
(if (treesit-ready-p 'markdown)
(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-ts-mode)))
(provide 'markdown-ts-mode)
;;; markdown-ts-mode.el ends here
|