1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
| | ;;; html-ts-mode.el --- tree-sitter support for HTML -*- lexical-binding: t; -*-
;; Copyright (C) 2023-2024 Free Software Foundation, Inc.
;; Author : Theodor Thornhill <theo@thornhill.no>
;; Maintainer : Theodor Thornhill <theo@thornhill.no>
;; Created : January 2023
;; Keywords : html 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 'sgml-mode)
(declare-function treesit-parser-create "treesit.c")
(declare-function treesit-node-type "treesit.c")
(defcustom html-ts-mode-indent-offset 2
"Number of spaces for each indentation step in `html-ts-mode'."
:version "29.1"
:type 'integer
:safe 'integerp
:group 'html)
(defvar html-ts-mode--indent-rules
`((html
((parent-is "fragment") column-0 0)
((node-is "/>") parent-bol 0)
((node-is ">") parent-bol 0)
((node-is "end_tag") parent-bol 0)
((parent-is "comment") prev-adaptive-prefix 0)
((parent-is "element") parent-bol html-ts-mode-indent-offset)
((parent-is "script_element") parent-bol html-ts-mode-indent-offset)
((parent-is "style_element") parent-bol html-ts-mode-indent-offset)
((parent-is "start_tag") parent-bol html-ts-mode-indent-offset)
((parent-is "self_closing_tag") parent-bol html-ts-mode-indent-offset)))
"Tree-sitter indent rules.")
(defvar html-ts-mode--font-lock-settings
(treesit-font-lock-rules
:language 'html
:override t
:feature 'comment
`((comment) @font-lock-comment-face)
:language 'html
:override t
:feature 'keyword
`("doctype" @font-lock-keyword-face)
:language 'html
:override t
:feature 'definition
`((tag_name) @font-lock-function-name-face)
:language 'html
:override t
:feature 'string
`((quoted_attribute_value) @font-lock-string-face)
:language 'html
:override t
:feature 'property
`((attribute_name) @font-lock-variable-name-face))
"Tree-sitter font-lock settings for `html-ts-mode'.")
(defun html-ts-mode--defun-name (node)
"Return the defun name of NODE.
Return nil if there is no name or if NODE is not a defun node."
(when (equal (treesit-node-type node) "tag_name")
(treesit-node-text node t)))
;;;###autoload
(define-derived-mode html-ts-mode html-mode "HTML"
"Major mode for editing Html, powered by tree-sitter."
:group 'html
(unless (treesit-ready-p 'html)
(error "Tree-sitter for HTML isn't available"))
(treesit-parser-create 'html)
;; Indent.
(setq-local treesit-simple-indent-rules html-ts-mode--indent-rules)
;; Navigation.
(setq-local treesit-defun-type-regexp "element")
(setq-local treesit-defun-name-function #'html-ts-mode--defun-name)
(setq-local treesit-thing-settings
`((html
(sexp ,(regexp-opt '("element"
"text"
"attribute"
"value")))
(sentence "tag")
(text ,(regexp-opt '("comment" "text"))))))
;; Font-lock.
(setq-local treesit-font-lock-settings html-ts-mode--font-lock-settings)
(setq-local treesit-font-lock-feature-list
'((comment keyword definition)
(property string)
() ()))
;; Imenu.
(setq-local treesit-simple-imenu-settings
'(("Element" "\\`tag_name\\'" nil nil)))
;; Outline minor mode.
;; Override default predicate to use "element" for outline headings
;; instead of "tag_name" from `treesit-simple-imenu-settings'.
(setq-local treesit-outline-predicate "\\`element\\'")
;; Restore default value for `treesit-outline-search'.
(kill-local-variable 'outline-regexp)
(kill-local-variable 'outline-heading-end-regexp)
(kill-local-variable 'outline-level)
(treesit-major-mode-setup))
(if (treesit-ready-p 'html)
(add-to-list 'auto-mode-alist '("\\.html\\'" . html-ts-mode)))
(provide 'html-ts-mode)
;;; html-ts-mode.el ends here
|