emacs-29 3f7598806eb: Add syntax-propertize-function to js-ts-mode

[Dmitry Gutov]

branch: emacs-29
commit 3f7598806eb923c907dd2d30e8ef1dea12e672ac
Author: Dmitry Gutov <dmitry@gutov.dev>
Commit: Dmitry Gutov <dmitry@gutov.dev>

    Add syntax-propertize-function to js-ts-mode
    
    * lisp/progmodes/js.el (js-ts--s-p-query):
    New variable (bug#65470).
    (js-ts--syntax-propertize): New function.
    (js-ts-mode): Use it.
---
 lisp/progmodes/js.el | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index 9d2990e7bc9..9b6da4ec2fc 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -3829,6 +3829,7 @@ Currently there are `js-mode' and `js-ts-mode'."
                 (append "{}():;,<>/" electric-indent-chars)) ;FIXME: js2-mode 
adds "[]*".
     (setq-local electric-layout-rules
                '((?\; . after) (?\{ . after) (?\} . before)))
+    (setq-local syntax-propertize-function #'js-ts--syntax-propertize)
 
     ;; Tree-sitter setup.
     (treesit-parser-create 'javascript)
@@ -3864,6 +3865,29 @@ Currently there are `js-mode' and `js-ts-mode'."
     (add-to-list 'auto-mode-alist
                  '("\\(\\.js[mx]\\|\\.har\\)\\'" . js-ts-mode))))
 
+(defvar js-ts--s-p-query
+  (when (treesit-available-p)
+    (treesit-query-compile 'javascript
+                           '(((regex pattern: (regex_pattern) @regexp))
+                             ((variable_declarator value: (jsx_element) @jsx))
+                             ((assignment_expression right: (jsx_element) 
@jsx))
+                             ((return_statement (jsx_element) @jsx))))))
+
+(defun js-ts--syntax-propertize (beg end)
+  (let ((captures (treesit-query-capture 'javascript js-ts--s-p-query beg 
end)))
+    (pcase-dolist (`(,name . ,node) captures)
+      (let* ((ns (treesit-node-start node))
+             (ne (treesit-node-end node))
+             (syntax (pcase-exhaustive name
+                       ('regexp
+                        (cl-decf ns)
+                        (cl-incf ne)
+                        (string-to-syntax "\"/"))
+                       ('jsx
+                        (string-to-syntax "|")))))
+        (put-text-property ns (1+ ns) 'syntax-table syntax)
+        (put-text-property (1- ne) ne 'syntax-table syntax)))))
+
 ;;;###autoload
 (define-derived-mode js-json-mode js-mode "JSON"
   (setq-local js-enabled-frameworks nil)