├── .gitignore
├── README.md
├── svelte-ts-mode.el
└── LICENSE


/.gitignore:
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1 | /*.elc
2 | 


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/README.md:
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  1 | # Svelte tree-sitter mode
  2 | 
  3 | An Emacs tree-sitter major mode for `.svelte` files.
  4 | 
  5 | It requires
  6 | 
  7 | - Emacs `(>= emacs-major-version 29)` with tree-sitter support.
  8 | 
  9 | Upstream grammars:
 10 | 
 11 | - [tree-sitter-svelte][3]: mandatory
 12 | - [tree-sitter-typescript][4]: optional
 13 | - [tree-sitter-javascript][5]: optional
 14 | - [tree-sitter-css][6]: optional
 15 | 
 16 | Example `language-source-alist` for `treesit-language-source-alist` can be found
 17 | in `svelte-ts-mode-language-source-alist` constant in [svelte-ts-mode.el](./svelte-ts-mode.el)
 18 | 
 19 | You can use command `M-x treesit-install-language-grammar` to install these grammars
 20 | once you have configured them in your `treesit-language-source-alist`.
 21 | 
 22 | ## Installation
 23 | 
 24 | NOTE, for Emacs master user, please use the `emacs-master` branch (i.e. you should add
 25 | option `:branch "emacs-master"` in your elpaca configuration or clone the `emacs-master`
 26 | branch locally).
 27 | 
 28 | > [!CAUTION]
 29 | > Still in early development.
 30 | 
 31 | - [MELPA][2]
 32 | 
 33 |   Not ready yet.
 34 | 
 35 | - Elpaca
 36 | 
 37 |   ```emacs-lisp
 38 |   (use-package svelte-ts-mode
 39 |     :ensure (:host github :repo "leafOfTree/svelte-ts-mode"))
 40 |   ```
 41 | 
 42 | - Manually
 43 | 
 44 |   ```bash
 45 |   git clone https://github.com/leafOfTree/svelte-ts-mode --depth 1
 46 |   ```
 47 | 
 48 |   ```lisp
 49 |   ; ~/.emacs
 50 |   (add-to-list 'load-path "/path/to/svelte-ts-mode")
 51 |   (require 'svelte-ts-mode)
 52 |   ```
 53 | 
 54 |   For [Spacemacs][1], put them inside `dotspacemacs/user-config`.
 55 | 
 56 |   ```lisp
 57 |   ; ~/.spacemacs
 58 |   (defun dotspacemacs/user-config ()
 59 |         
 60 |   (add-to-list 'load-path "/path/to/svelte-ts-mode")
 61 |   (require 'svelte-ts-mode)
 62 |   ```
 63 | 
 64 | ## Example Configuration
 65 | 
 66 | ```emacs-lisp
 67 | (use-package svelte-ts-mode
 68 |   :after eglot
 69 |   :ensure (:host github :repo "leafOfTree/svelte-ts-mode")
 70 |   :config
 71 |   (add-to-list 'eglot-server-programs '(svelte-ts-mode . ("svelteserver" "--stdio"))))
 72 | ```
 73 | 
 74 | ## Tips
 75 | 
 76 | ### Set project-wide indentation offset for different languages
 77 | 
 78 | Create `.dir-locals.el` at the project root directory, and write content like the
 79 | following into it:
 80 | 
 81 | ```emacs-lisp
 82 | ;;; Directory Local Variables         -*- no-byte-compile: t; -*-
 83 | ;;; For more information see (info "(emacs) Directory Variables")
 84 | 
 85 | ((nil . ((typescript-ts-mode-indent-offset . 4)
 86 |          (js-indent-level . 4)
 87 |          (css-indent-offset . 4)
 88 |          (svelte-ts-mode-indent-offset . 2))))
 89 | ```
 90 | 
 91 | This ensures indentation for a specific language(e.g. typescript) between its major mode
 92 | and `svelte-ts-mode` are the same.
 93 | 
 94 | ## Credits
 95 | 
 96 | Inspired by `mhtml-ts-mode`
 97 | 
 98 | [1]: https://github.com/syl20bnr/spacemacs
 99 | [2]: https://melpa.org/#/svelte-mode
100 | [3]: https://github.com/Himujjal/tree-sitter-svelte
101 | [4]: https://github.com/tree-sitter/tree-sitter-typescript
102 | [5]: https://github.com/tree-sitter/tree-sitter-javascript
103 | [6]: https://github.com/tree-sitter/tree-sitter-css
104 | 
105 | 


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/svelte-ts-mode.el:
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  1 | ;;; svelte-ts-mode.el --- Emacs major mode for Svelte -*- lexical-binding:t -*-
  2 | ;; Copyright (C) 2025 Leaf.
  3 | 
  4 | ;; Author: Leaf <leafvocation@gmail.com>
  5 | ;; Author: Meow King <mr.meowking@posteo.com>
  6 | ;; Created: 5 Dec 2024
  7 | ;; Keywords: svelte languages tree-sitter
  8 | ;; Homepage: https://github.com/leafOfTree/svelte-ts-mode
  9 | ;; Version: 1.0.0
 10 | ;; Package-Requires: ((emacs "29.1"))
 11 | 
 12 | ;; This file is NOT part of GNU Emacs.
 13 | ;; You can redistribute it and/or modify it under the terms of
 14 | ;; the GNU Lesser General Public License v3.0.
 15 | 
 16 | ;;; Commentary:
 17 | 
 18 | ;; This major mode includes typescript-ts-mode and css-mode
 19 | ;; to support basic treesit svelte syntax and indent
 20 | 
 21 | 
 22 | ;; Note this mode advises `comment-normalize-vars' to create special behavior
 23 | ;; for `svelte-ts-mode' only.  You can set `svelte-ts-mode-enable-comment-advice'
 24 | ;; to nil to avoid advice.
 25 | 
 26 | ;;; Code:
 27 | 
 28 | (require 'treesit)
 29 | 
 30 | (defgroup svelte-ts nil
 31 |   "`svelte-ts-mode'."
 32 |   :group 'languages)
 33 | 
 34 | (defcustom svelte-ts-mode-indent-offset 2
 35 |   "Number of spaces for each indentation step in `svelte-ts-mode'."
 36 |   :type 'integer
 37 |   :safe 'integerp
 38 |   :group 'svelte-ts
 39 |   :package-version '(svelte-ts-mode . "1.0.0"))
 40 | 
 41 | (defcustom svelte-ts-mode-enable-comment-advice t
 42 |   "Enable language-wise comment inside `svlete-ts-mode' buffer."
 43 |   :type 'boolean
 44 |   :safe 'booleanp
 45 |   :group 'svelte-ts
 46 |   :package-version '(svelte-ts-mode . "1.0.0"))
 47 | 
 48 | (defconst svelte-ts-mode-language-source-alist
 49 |   '((svelte . ("https://github.com/Himujjal/tree-sitter-svelte"))
 50 |     (typescript . ("https://github.com/tree-sitter/tree-sitter-typescript" nil
 51 |                    "typescript/src"))
 52 |     (javascript . ("https://github.com/tree-sitter/tree-sitter-javascript"))
 53 |     (css . ("https://github.com/tree-sitter/tree-sitter-css")))
 54 |   "Language source for `svelte-ts-mode'.
 55 | User can easily add it to their `treesit-language-source-alist'.
 56 | In the future, we may pin a version.")
 57 | 
 58 | (defconst svelte-ts-mode--indent-close-types-regexp
 59 |   (concat
 60 |    "\\`"
 61 |    (regexp-opt
 62 |     '(">" "/>" "}"
 63 |       "end_tag"
 64 |       "else_if_statement" "else_statement" "if_end_expr"  ; if
 65 |       "key_end_expr"  ; key
 66 |       "else_statement" "each_end_expr"  ; each
 67 |       "then_statement" "catch_statement" "await_end_expr"  ; await
 68 |       "snippet_end_expr"  ; snippet
 69 |       ))
 70 |    "\\'"))
 71 | 
 72 | (defconst svelte-ts-mode--container-node-types-regexp
 73 |   (concat
 74 |    "\\`"
 75 |    (regexp-opt
 76 |     '(; html
 77 |       "element" "script_element" "style_element"
 78 | 
 79 |       ;; svelte
 80 |       ;; if
 81 |       "if_statement" "if_start_expr"
 82 |       "else_if_statement" "else_if_expr"
 83 |       "else_statement" "else_expr"
 84 |       "if_end_expr"
 85 | 
 86 |       ;; key
 87 |       "key_statement" "key_start_expr" "key_end_expr"
 88 | 
 89 |       ;; each
 90 |       "each_statement" "each_start_expr"
 91 |       "else_each_statement" "else_expr"
 92 |       "each_end_expr"
 93 |       
 94 |       ;; await
 95 |       "await_statement" "await_start_expr"
 96 |       "then_statement" "then_expr"
 97 |       "catch_statement" "catch_expr"
 98 |       "await_end_expr"
 99 | 
100 |       ;; snippet
101 |       "snippet_statement" "snippet_start_expr" "snippet_end_expr"
102 | 
103 |       ;; misc expression
104 |       "expression" "html_expr" "const_expr" "render_expr" "debug_expr"))
105 |    "\\'"))
106 | 
107 | 
108 | (defvar svelte-ts-mode-font-lock-settings
109 |   (treesit-font-lock-rules
110 |    :language 'svelte
111 |    :feature 'error
112 |    '((erroneous_end_tag_name) @font-lock-warning-face)
113 | 
114 |    :language 'svelte
115 |    :feature 'definition
116 |    '((tag_name) @font-lock-function-name-face)
117 | 
118 |    
119 |    :language 'svelte
120 |    :feature 'comment
121 |    '((comment) @font-lock-comment-face)
122 |    
123 |    :language 'svelte
124 |    :feature 'keyword
125 |    '([(special_block_keyword)
126 |       (then)
127 |       (as)]
128 |      @font-lock-keyword-face)
129 | 
130 |    :language 'svelte
131 |    :feature 'punctuation
132 |    '(["{" "}"] @font-lock-bracket-face
133 |      "=" @font-lock-operator-face
134 |      ["<" ">" "</" "/>" "#" ":" "/" "@"] @font-lock-delimiter-face)
135 |    
136 |    :language 'svelte
137 |    :feature 'property
138 |    '((attribute_name) @font-lock-property-name-face)
139 | 
140 |    :language 'svelte
141 |    :feature 'string
142 |    '([(attribute_value)
143 |       (quoted_attribute_value)]
144 |      @font-lock-string-face)))
145 | 
146 | (defconst svelte-ts-mode-font-lock-features-list
147 |   '((error definition comment keyword)
148 |     (property string)
149 |     (punctuation)
150 |     ()))
151 | 
152 | (defvar-local svelte-ts-mode--treesit-buffer-ready
153 |     '((svelte . nil)
154 |       (javascript . nil)
155 |       (typescript . nil)
156 |       (css . nil))
157 |   "Memoized treesit-ready-p output for required modes in a buffer local alist.")
158 | 
159 | (defun svelte-ts-mode--treesit-buffer-ready (mode)
160 |   "Returns memoized value of treesit-ready-p."
161 |   (let ((cell (assoc mode svelte-ts-mode--treesit-buffer-ready)))
162 |     (if cell
163 |         (or (cdr cell) (setcdr cell (treesit-ready-p mode)))
164 |       (error "Unsupported treesit mode"))))
165 | 
166 | (defun svelte-ts-mode--indent-inside-container-nodes-p (_node parent _bol)
167 |   "Whether the ancestor node(also itself) of PARENT is of container node type.
168 | NODE, PARENT and BOL see `treesit-simple-indent-rules'."
169 |   (treesit-parent-until
170 |    ;; NODE can be nil (hit return), so we use PARENT
171 |    parent
172 |    (lambda (node)
173 |      (string-match-p
174 |       svelte-ts-mode--container-node-types-regexp
175 |       (treesit-node-type node)))
176 |    t))
177 | 
178 | 
179 | (defun svelte-ts-mode--indent-ancestor-container-nodes-bol (node parent bol)
180 |   "Return the beginning of line position of the closest ancestor container node.
181 | NODE, PARENT and BOL see `treesit-simple-indent-rules'."
182 |   (save-excursion
183 |     (goto-char
184 |      (treesit-node-start
185 |       (svelte-ts-mode--indent-inside-container-nodes-p node parent bol)))
186 |     (back-to-indentation)
187 |     (point)))
188 | 
189 | (defun svelte-ts-mode--indent-close-type-find-matching-parent-bol (node parent bol)
190 |   (let* ((node-type (treesit-node-type node))
191 |          (parent-node-raw-regexp  ; `nil' means direct parent is the matching parent
192 |           (pcase node-type
193 |             ;; if
194 |             ("else_if_statement" "if_statement")
195 |             ("if_end_expr" "if_statement")
196 | 
197 |             ;; key
198 |             ("key_end_expr" "key_statement")
199 |             
200 |             ;; each
201 |             ("each_end_expr" "each_statement")
202 | 
203 |             ;; await
204 |             ("then_statement" "await_statement")
205 |             ("catch_statement" "await_statement")
206 |             ("await_end_expr" "await_statement")
207 | 
208 |             ;; snippet
209 |             ("snippet_end_expr" "snippet_statement")
210 | 
211 |             ;; common
212 |             ("else_statement" (regexp-opt '("if_statement" "each_statement")))))
213 |          (parent-node-raw-regexp
214 |           (when parent-node-raw-regexp
215 |             (concat "\\`" parent-node-raw-regexp "\\'"))))
216 |     (save-excursion
217 |       (goto-char
218 |        (treesit-node-start
219 |         (if (not parent-node-raw-regexp)
220 |             parent
221 |           (treesit-parent-until
222 |            parent
223 |            (lambda (node)
224 |              (string-match-p parent-node-raw-regexp (treesit-node-type node)))
225 |            t))))
226 |       (back-to-indentation)
227 |       (point))))
228 | 
229 | 
230 | (defvar svelte-ts-mode--indent-rules
231 |   `((svelte
232 |      ;; ((lambda (node parent bol)
233 |      ;;    (message "%s: %s %s %s %s %s"
234 |      ;;             (point) node parent
235 |      ;;             (treesit-node-parent parent)
236 |      ;;             (treesit-node-parent (treesit-node-parent parent)) bol)
237 |      ;;    nil)
238 |      ;;  parent-bol 0)
239 | 
240 |      ((parent-is "document") column-0 0)
241 |      ((parent-is "comment") prev-adaptive-prefix 0)
242 |      
243 |      ((node-is ,svelte-ts-mode--indent-close-types-regexp)
244 |       svelte-ts-mode--indent-close-type-find-matching-parent-bol 0)
245 | 
246 |      (svelte-ts-mode--indent-inside-container-nodes-p
247 |       svelte-ts-mode--indent-ancestor-container-nodes-bol
248 |       svelte-ts-mode-indent-offset)))
249 |   "Tree-sitter indent rules.")
250 | 
251 | ;; NOTE it's a must to prefix features in Emacs 30. Otherwise embedded CSS code
252 | ;; cannot be highlighted correctly. See
253 | ;; https://github.com/leafOfTree/svelte-ts-mode/issues/7
254 | (defun svelte-ts-mode--prefix-font-lock-features (prefix settings)
255 |   "Prefix with PREFIX the font lock features in SETTINGS."
256 |   (cl-loop for i from 0 below (length settings)
257 |            collect
258 |            (mapcar (lambda (f) (intern (format "%s-%s" prefix f)))
259 |                    (nth i settings))))
260 | 
261 | (defun svelte-ts-mode--prefix-font-lock-settings-features-name (prefix settings)
262 |   "Prefix with PREFIX the font lock features in SETTINGS."
263 |   (mapcar (lambda (setting)
264 |             (pcase setting
265 |               (`(,lang ,query ,feature . ,rest)
266 |                `(,lang ,query ,(intern (format "%s-%s" prefix feature)) . ,rest))))
267 |           settings))
268 | 
269 | (defun svelte-ts-mode--merge-font-lock-features (a b)
270 |   "Merge `treesit-font-lock-feature-list' A with B."
271 |   (let* ((len-a (length a))
272 |          (len-b (length b))
273 |          (max-len (max len-a len-b)))
274 |     (cl-loop for i from 0 below max-len
275 |              collect (seq-uniq
276 |                       (append
277 |                        (and (< i len-a) (nth i a) (nth i a))
278 |                        (and (< i len-b) (nth i b) (nth i b)))))))
279 | 
280 | ;; Copied from Emacs 31's `treesit-simple-indent-modify-rules'
281 | (defun svlete-ts-mode--simple-indent-modify-rules (lang new-rules rules &optional how)
282 |   "Pick out rules for LANG in RULES, and modify it according to NEW_RULES.
283 | 
284 | RULES should have the same form as `treesit-simple-indent-rules', i.e, a
285 | list of (LANG RULES...).  Return a new modified rules in the form
286 | of (LANG RULES...).
287 | 
288 | If HOW is omitted or :replace, for each rule in NEW-RULES, find the old
289 | rule that has the same matcher, and replace it.
290 | 
291 | If HOW is :prepend, just prepend NEW-RULES to the old rules; if HOW is
292 | :append, append NEW-RULES."
293 |   (cond
294 |    ((not (alist-get lang rules))
295 |     (error "No rules for language %s in RULES" lang))
296 |    ((not (alist-get lang new-rules))
297 |     (error "No rules for language %s in NEW-RULES" lang))
298 |    (t (let* ((copy-of-rules (copy-tree rules))
299 | 	           (lang-rules (alist-get lang copy-of-rules))
300 | 	           (lang-new-rules (alist-get lang new-rules)))
301 | 	      (cond
302 | 	       ((eq how :prepend)
303 | 	        (setf (alist-get lang copy-of-rules)
304 | 		            (append lang-new-rules lang-rules)))
305 | 	       ((eq how :append)
306 | 	        (setf (alist-get lang copy-of-rules)
307 | 		            (append lang-rules lang-new-rules)))
308 | 	       ((or (eq how :replace) t)
309 | 	        (let ((tail-new-rules lang-new-rules)
310 | 		            (tail-rules lang-rules)
311 | 		            (new-rule nil)
312 | 		            (rule nil))
313 | 	          (while (setq new-rule (car tail-new-rules))
314 | 	            (while (setq rule (car tail-rules))
315 | 		            (when (equal (nth 0 new-rule) (nth 0 rule))
316 | 		              (setf (car tail-rules) new-rule))
317 | 		            (setq tail-rules (cdr tail-rules)))
318 | 	            (setq tail-new-rules (cdr tail-new-rules))))))
319 | 	      copy-of-rules))))
320 | 
321 | 
322 | (defconst svelte-ts-mode--query-get-script-element-attrs
323 |   (when (treesit-ready-p 'svelte)
324 |     (treesit-query-compile 'svelte '((start_tag (attribute) @attr)))))
325 | 
326 | (defun svelte-ts-mode--treesit-language-at-point (pos)
327 |   (let* ((node (treesit-node-at pos 'svelte))
328 |          (parent (treesit-node-parent node))
329 |          (js-ready (svelte-ts-mode--treesit-buffer-ready 'javascript))
330 |          (ts-ready (svelte-ts-mode--treesit-buffer-ready 'typescript))
331 |          (css-ready (svelte-ts-mode--treesit-buffer-ready 'css)))
332 |     (cond
333 |      ((and node parent
334 |            (equal (treesit-node-type node) "raw_text")
335 |            (equal (treesit-node-type parent) "script_element"))
336 |       (if (and js-ready ts-ready)
337 |           (if (null (treesit-query-capture
338 |                      parent svelte-ts-mode--query-get-script-element-attrs))
339 |               'javascript
340 |             'typescript)
341 |         (if ts-ready
342 |             'typescrpt
343 |           (if js-ready
344 |               'javscript
345 |             'svelte))))
346 |      ((and node parent
347 |            (equal (treesit-node-type node) "raw_text")
348 |            (equal (treesit-node-type parent) "style_element"))
349 |       (if css-ready
350 |           'css
351 |         'svelte))
352 |      (t 'svelte))))
353 | 
354 | ;; reference: mhtml-ts-mode--js-css-tag-bol
355 | (defun svelte-ts-mode--script-style-tag-bol (_node _parent &rest _)
356 |   "Find the first non-space characters of html tags <script> or <style>.
357 | Return `line-beginning-position' when `treesit-node-at' is svelte.
358 | NODE and PARENT are ignored."
359 |   (if (or (eq (treesit-language-at (point)) 'svelte))
360 |       (line-beginning-position)
361 |     (save-excursion
362 |       (re-search-backward "<script.*>\\|<style.*>" nil t))))
363 | 
364 | (defun svelte-ts-mode--adivce--comment-normalize-vars (fun &rest args)
365 |   "Advice for `comment-normalize-vars'.
366 | FUN: `comment-normalize-vars'.
367 | ARGS: rest args for `comment-normalize-vars'."
368 |   (if (not (equal major-mode 'svelte-ts-mode))
369 |       (apply fun args)
370 | 
371 |     ;; unset used variables to not affects other languages in svelte-ts-mode buffer
372 |     (setq-local
373 |      comment-start nil
374 |      comment-end nil
375 |      comment-start-skip nil
376 |      comment-end-skip nil
377 |      adaptive-fill-mode nil
378 |      adaptive-fill-first-line-regexp "\\`[ \t]*\\'"
379 |      paragraph-start "\f\\|[ \t]*$"
380 |      paragraph-separate "[ \t\f]*$"
381 |      fill-paragraph-function nil
382 |      comment-line-break-function #'comment-indent-new-line
383 |      comment-multi-line nil
384 |      
385 |      comment-indent-function #'comment-indent-default
386 |      comment-line-break-function #'comment-indent-new-line)
387 |     
388 |     (pcase (treesit-language-at (point))
389 |       ((or 'typescript 'javascript)
390 |        (c-ts-common-comment-setup))
391 |       ('css
392 |        (setq-local comment-start "/*")
393 |        (setq-local comment-start-skip "/\\*+[ \t]*")
394 |        (setq-local comment-end "*/")
395 |        (setq-local comment-end-skip "[ \t]*\\*+/"))
396 |       ('svelte
397 |        (setq-local comment-start "<!-- ")
398 |        (setq-local comment-end " -->")
399 |        (setq-local comment-indent-function #'sgml-comment-indent)
400 |        (setq-local comment-line-break-function #'sgml-comment-indent-new-line))
401 |       (_ (error "Invalid language symbol!")))
402 |     
403 |     (apply fun args)))
404 | 
405 | (defun svelte-ts-mode-clean-advice ()
406 |   (interactive)
407 |   (advice-remove #'comment-normalize-vars
408 |                  #'svelte-ts-mode--adivce--comment-normalize-vars))
409 | 
410 | 
411 | (define-derived-mode svelte-ts-mode prog-mode "Svelte"
412 |   "A mode for editing Svelte templates."
413 |   (unless (svelte-ts-mode--treesit-buffer-ready 'svelte)
414 |     (error "Tree-sitter for svelte isn't available"))
415 | 
416 |   (setq treesit-primary-parser (treesit-parser-create 'svelte))
417 |   
418 |   ;; Font-lock.
419 |   (setq-local treesit-font-lock-settings svelte-ts-mode-font-lock-settings)
420 |   (setq-local treesit-font-lock-feature-list svelte-ts-mode-font-lock-features-list)
421 | 
422 |   ;; ;; Indent.
423 |   (setq-local treesit-simple-indent-rules svelte-ts-mode--indent-rules)
424 | 
425 | 
426 |   (when (svelte-ts-mode--treesit-buffer-ready 'javascript)
427 |     (require 'js)
428 |     (setq-local treesit-font-lock-settings
429 |                 (append treesit-font-lock-settings
430 |                         (svelte-ts-mode--prefix-font-lock-settings-features-name
431 |                          "javascript" (js--treesit-font-lock-settings))))
432 |     (setq-local treesit-simple-indent-rules
433 |                 (append treesit-simple-indent-rules
434 |                         (svlete-ts-mode--simple-indent-modify-rules
435 |                          'javascript
436 |                          '((javascript ((parent-is "program")
437 |                                         svelte-ts-mode--script-style-tag-bol
438 |                                         svelte-ts-mode-indent-offset)))
439 |                          (js--treesit-indent-rules)
440 |                          :replace)))
441 |     (setq-local treesit-font-lock-feature-list
442 |                 (svelte-ts-mode--merge-font-lock-features
443 |                  treesit-font-lock-feature-list
444 |                  ;; Emacs 29 doesn't have `js--treesit-font-lock-feature-list'
445 |                  (svelte-ts-mode--prefix-font-lock-features
446 |                   "javascript"
447 |                   '((comment document definition) (keyword string)
448 |                     (assignment constant escape-sequence jsx number pattern string-interpolation)
449 |                     (bracket delimiter function operator property)))))
450 |     (treesit-parser-create 'javascript))
451 | 
452 |   (when (svelte-ts-mode--treesit-buffer-ready 'typescript)
453 |     (require 'typescript-ts-mode)
454 |     (setq-local treesit-font-lock-settings
455 |                 (append treesit-font-lock-settings
456 |                         (svelte-ts-mode--prefix-font-lock-settings-features-name
457 |                          "typescript"
458 |                          (typescript-ts-mode--font-lock-settings 'typescript))))
459 |     (setq-local treesit-simple-indent-rules
460 |                 (append treesit-simple-indent-rules
461 |                         (svlete-ts-mode--simple-indent-modify-rules
462 |                          'typescript
463 |                          '((typescript ((parent-is "program")
464 |                                         svelte-ts-mode--script-style-tag-bol
465 |                                         svelte-ts-mode-indent-offset)))
466 |                          (typescript-ts-mode--indent-rules 'typescript)
467 |                          :replace)))
468 |     (setq-local treesit-font-lock-feature-list
469 |                 (svelte-ts-mode--merge-font-lock-features
470 |                  treesit-font-lock-feature-list
471 |                  (svelte-ts-mode--prefix-font-lock-features
472 |                   "typescript"
473 |                   '((comment declaration)
474 |                     (keyword string escape-sequence)
475 |                     (constant expression identifier number pattern property)
476 |                     (operator function bracket delimiter)))))
477 |     (treesit-parser-create 'typescript))
478 |   
479 |   (when (svelte-ts-mode--treesit-buffer-ready 'css)
480 |     (require 'css-mode)
481 |     (setq-local treesit-font-lock-settings
482 |                 (append treesit-font-lock-settings
483 |                         (svelte-ts-mode--prefix-font-lock-settings-features-name
484 |                          "css" css--treesit-settings)))
485 |     (setq-local treesit-simple-indent-rules
486 |                 (append treesit-simple-indent-rules
487 |                         (svlete-ts-mode--simple-indent-modify-rules
488 |                          'css
489 |                          '((css ((parent-is "stylesheet")
490 |                                  svelte-ts-mode--script-style-tag-bol
491 |                                  svelte-ts-mode-indent-offset)))
492 |                          css--treesit-indent-rules
493 | 	                       :prepend)))
494 |     (setq-local treesit-font-lock-feature-list
495 |                 (svelte-ts-mode--merge-font-lock-features
496 |                  ;; Emacs 29 doesn't have `css--treesit-font-lock-feature-list'
497 |                  treesit-font-lock-feature-list
498 |                  (svelte-ts-mode--prefix-font-lock-features
499 |                   "css"
500 |                   '((selector comment query keyword) (property constant string)
501 |                     (error variable function operator bracket)))))
502 |     (treesit-parser-create 'css))
503 | 
504 | 
505 |   (when svelte-ts-mode-enable-comment-advice
506 |     ;; advice-add won't add it twice
507 |     (advice-add #'comment-normalize-vars :around
508 |                 #'svelte-ts-mode--adivce--comment-normalize-vars))
509 | 
510 |   (let ((js-ready (svelte-ts-mode--treesit-buffer-ready 'javascript))
511 |         (ts-ready (svelte-ts-mode--treesit-buffer-ready 'typescript))
512 |         (css-ready (svelte-ts-mode--treesit-buffer-ready 'css)))
513 |     (setq-local treesit-range-settings
514 |                 (nconc
515 |                  treesit-range-settings
516 |                  (if (and js-ready ts-ready)
517 |                      ;; NOTE in Emacs 31 :embed can be a function
518 |                      (treesit-range-rules
519 |                       :embed 'typescript
520 |                       :host 'svelte
521 |                       '((script_element (start_tag (attribute)) (raw_text) @capture))
522 | 
523 |                       :embed 'javascript
524 |                       :host 'svelte
525 |                       '((script_element (start_tag (tag_name) :anchor ">")  (raw_text) @capture)))
526 |                    (if ts-ready
527 |                        (treesit-range-rules
528 |                         :embed 'typescript
529 |                         :host 'svelte
530 |                         '((script_element (raw_text) @capture)))
531 |                      (when js-ready
532 |                        (treesit-range-rules
533 |                         :embed 'javascript
534 |                         :host 'svelte
535 |                         '((script_element (raw_text) @capture))))))
536 |                  (when css-ready
537 |                    (treesit-range-rules
538 |                     :embed 'css
539 |                     :host 'svelte
540 |                     '((style_element (raw_text) @capture)))))))
541 | 
542 |   (setq-local treesit-language-at-point-function #'svelte-ts-mode--treesit-language-at-point)
543 | 
544 |   (treesit-major-mode-setup))
545 | 
546 | (when (treesit-ready-p 'svelte)
547 |   (add-to-list 'auto-mode-alist '("\\.svelte\\'" . svelte-ts-mode)))
548 | 
549 | (provide 'svelte-ts-mode)
550 | 
551 | ;;; svelte-ts-mode.el ends here
552 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
  1 |                     GNU GENERAL PUBLIC LICENSE
  2 |                        Version 3, 29 June 2007
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160 | covered work is covered by this License only if the output, given its
161 | content, constitutes a covered work.  This License acknowledges your
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165 | convey, without conditions so long as your license otherwise remains
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180 | 
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467 | (including a cross-claim or counterclaim in a lawsuit) alleging that
468 | any patent claim is infringed by making, using, selling, offering for
469 | sale, or importing the Program or any portion of it.
470 | 
471 |   11. Patents.
472 | 
473 |   A "contributor" is a copyright holder who authorizes use under this
474 | License of the Program or a work on which the Program is based.  The
475 | work thus licensed is called the contributor's "contributor version".
476 | 
477 |   A contributor's "essential patent claims" are all patent claims
478 | owned or controlled by the contributor, whether already acquired or
479 | hereafter acquired, that would be infringed by some manner, permitted
480 | by this License, of making, using, or selling its contributor version,
481 | but do not include claims that would be infringed only as a
482 | consequence of further modification of the contributor version.  For
483 | purposes of this definition, "control" includes the right to grant
484 | patent sublicenses in a manner consistent with the requirements of
485 | this License.
486 | 
487 |   Each contributor grants you a non-exclusive, worldwide, royalty-free
488 | patent license under the contributor's essential patent claims, to
489 | make, use, sell, offer for sale, import and otherwise run, modify and
490 | propagate the contents of its contributor version.
491 | 
492 |   In the following three paragraphs, a "patent license" is any express
493 | agreement or commitment, however denominated, not to enforce a patent
494 | (such as an express permission to practice a patent or covenant not to
495 | sue for patent infringement).  To "grant" such a patent license to a
496 | party means to make such an agreement or commitment not to enforce a
497 | patent against the party.
498 | 
499 |   If you convey a covered work, knowingly relying on a patent license,
500 | and the Corresponding Source of the work is not available for anyone
501 | to copy, free of charge and under the terms of this License, through a
502 | publicly available network server or other readily accessible means,
503 | then you must either (1) cause the Corresponding Source to be so
504 | available, or (2) arrange to deprive yourself of the benefit of the
505 | patent license for this particular work, or (3) arrange, in a manner
506 | consistent with the requirements of this License, to extend the patent
507 | license to downstream recipients.  "Knowingly relying" means you have
508 | actual knowledge that, but for the patent license, your conveying the
509 | covered work in a country, or your recipient's use of the covered work
510 | in a country, would infringe one or more identifiable patents in that
511 | country that you have reason to believe are valid.
512 | 
513 |   If, pursuant to or in connection with a single transaction or
514 | arrangement, you convey, or propagate by procuring conveyance of, a
515 | covered work, and grant a patent license to some of the parties
516 | receiving the covered work authorizing them to use, propagate, modify
517 | or convey a specific copy of the covered work, then the patent license
518 | you grant is automatically extended to all recipients of the covered
519 | work and works based on it.
520 | 
521 |   A patent license is "discriminatory" if it does not include within
522 | the scope of its coverage, prohibits the exercise of, or is
523 | conditioned on the non-exercise of one or more of the rights that are
524 | specifically granted under this License.  You may not convey a covered
525 | work if you are a party to an arrangement with a third party that is
526 | in the business of distributing software, under which you make payment
527 | to the third party based on the extent of your activity of conveying
528 | the work, and under which the third party grants, to any of the
529 | parties who would receive the covered work from you, a discriminatory
530 | patent license (a) in connection with copies of the covered work
531 | conveyed by you (or copies made from those copies), or (b) primarily
532 | for and in connection with specific products or compilations that
533 | contain the covered work, unless you entered into that arrangement,
534 | or that patent license was granted, prior to 28 March 2007.
535 | 
536 |   Nothing in this License shall be construed as excluding or limiting
537 | any implied license or other defenses to infringement that may
538 | otherwise be available to you under applicable patent law.
539 | 
540 |   12. No Surrender of Others' Freedom.
541 | 
542 |   If conditions are imposed on you (whether by court order, agreement or
543 | otherwise) that contradict the conditions of this License, they do not
544 | excuse you from the conditions of this License.  If you cannot convey a
545 | covered work so as to satisfy simultaneously your obligations under this
546 | License and any other pertinent obligations, then as a consequence you may
547 | not convey it at all.  For example, if you agree to terms that obligate you
548 | to collect a royalty for further conveying from those to whom you convey
549 | the Program, the only way you could satisfy both those terms and this
550 | License would be to refrain entirely from conveying the Program.
551 | 
552 |   13. Use with the GNU Affero General Public License.
553 | 
554 |   Notwithstanding any other provision of this License, you have
555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work.  The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 | 
563 |   14. Revised Versions of this License.
564 | 
565 |   The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time.  Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 | 
570 |   Each version is given a distinguishing version number.  If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation.  If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 | 
579 |   If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 | 
584 |   Later license versions may give you additional or different
585 | permissions.  However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 | 
589 |   15. Disclaimer of Warranty.
590 | 
591 |   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 | 
600 |   16. Limitation of Liability.
601 | 
602 |   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 | 
612 |   17. Interpretation of Sections 15 and 16.
613 | 
614 |   If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 | 
621 |                      END OF TERMS AND CONDITIONS
622 | 
623 |             How to Apply These Terms to Your New Programs
624 | 
625 |   If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 | 
629 |   To do so, attach the following notices to the program.  It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 | 
634 |     <one line to give the program's name and a brief idea of what it does.>
635 |     Copyright (C) <year>  <name of author>
636 | 
637 |     This program is free software: you can redistribute it and/or modify
638 |     it under the terms of the GNU General Public License as published by
639 |     the Free Software Foundation, either version 3 of the License, or
640 |     (at your option) any later version.
641 | 
642 |     This program is distributed in the hope that it will be useful,
643 |     but WITHOUT ANY WARRANTY; without even the implied warranty of
644 |     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645 |     GNU General Public License for more details.
646 | 
647 |     You should have received a copy of the GNU General Public License
648 |     along with this program.  If not, see <https://www.gnu.org/licenses/>.
649 | 
650 | Also add information on how to contact you by electronic and paper mail.
651 | 
652 |   If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 | 
655 |     <program>  Copyright (C) <year>  <name of author>
656 |     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 |     This is free software, and you are welcome to redistribute it
658 |     under certain conditions; type `show c' for details.
659 | 
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License.  Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 | 
664 |   You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | <https://www.gnu.org/licenses/>.
668 | 
669 |   The GNU General Public License does not permit incorporating your program
670 | into proprietary programs.  If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library.  If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License.  But first, please read
674 | <https://www.gnu.org/licenses/why-not-lgpl.html>.
675 | 


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