114 lines
3.9 KiB
EmacsLisp
114 lines
3.9 KiB
EmacsLisp
;;; markdown-ts-mode.el --- tree sitter support for Markdown -*- lexical-binding: t; -*-
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;; Copyright (C) 2024-2025 Free Software Foundation, Inc.
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;; Author : Rahul Martim Juliato <rahul.juliato@gmail.com>
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;; Maintainer : Rahul Martim Juliato <rahul.juliato@gmail.com>
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;; Created : April 2024
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;; Keywords : markdown md languages tree-sitter
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU 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. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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(require 'treesit)
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(require 'subr-x)
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(declare-function treesit-node-parent "treesit.c")
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(declare-function treesit-node-type "treesit.c")
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(declare-function treesit-parser-create "treesit.c")
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(defvar markdown-ts--treesit-settings
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(treesit-font-lock-rules
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:language 'markdown
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:override t
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:feature 'delimiter
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'([ "[" "]" "(" ")" ] @shadow)
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:language 'markdown
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:feature 'paragraph
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'([((setext_heading) @font-lock-keyword-face)
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((atx_heading) @font-lock-keyword-face)
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((thematic_break) @shadow)
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((indented_code_block) @font-lock-string-face)
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(list_item (list_marker_star) @font-lock-keyword-face)
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(list_item (list_marker_plus) @font-lock-keyword-face)
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(list_item (list_marker_minus) @font-lock-keyword-face)
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(list_item (list_marker_dot) @font-lock-keyword-face)
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(fenced_code_block (fenced_code_block_delimiter) @font-lock-doc-face)
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(fenced_code_block (code_fence_content) @font-lock-string-face)
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((block_quote_marker) @font-lock-string-face)
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(block_quote (paragraph) @font-lock-string-face)
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(block_quote (block_quote_marker) @font-lock-string-face)
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])
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:language 'markdown-inline
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:feature 'paragraph-inline
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'([
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((image_description) @link)
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((link_destination) @font-lock-string-face)
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((code_span) @font-lock-string-face)
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((emphasis) @underline)
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((strong_emphasis) @bold)
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(inline_link (link_text) @link)
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(inline_link (link_destination) @font-lock-string-face)
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(shortcut_link (link_text) @link)])))
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(defun markdown-ts-imenu-node-p (node)
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"Check if NODE is a valid entry to imenu."
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(equal (treesit-node-type (treesit-node-parent node))
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"atx_heading"))
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(defun markdown-ts-imenu-name-function (node)
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"Return an imenu entry if NODE is a valid header."
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(let ((name (treesit-node-text node)))
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(if (markdown-ts-imenu-node-p node)
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(thread-first (treesit-node-parent node)(treesit-node-text))
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name)))
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(defun markdown-ts-setup ()
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"Setup treesit for `markdown-ts-mode'."
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(setq-local treesit-font-lock-settings markdown-ts--treesit-settings)
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(treesit-major-mode-setup))
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;;;###autoload
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(define-derived-mode markdown-ts-mode text-mode "Markdown"
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"Major mode for editing Markdown using tree-sitter grammar."
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(setq-local font-lock-defaults nil
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treesit-font-lock-feature-list '((delimiter)
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(paragraph)
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(paragraph-inline)))
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(setq-local treesit-simple-imenu-settings
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`(("Headings" markdown-ts-imenu-node-p nil markdown-ts-imenu-name-function)))
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(when (treesit-ready-p 'markdown)
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(treesit-parser-create 'markdown-inline)
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(treesit-parser-create 'markdown)
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(markdown-ts-setup)))
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(derived-mode-add-parents 'markdown-ts-mode '(markdown-mode))
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(if (treesit-ready-p 'markdown)
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(add-to-list 'auto-mode-alist '("\\.md\\'" . markdown-ts-mode)))
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(provide 'markdown-ts-mode)
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;;; markdown-ts-mode.el ends here
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