emacs-29 6adc193ad66: Move c-like common utils into own library (bug#60961)

[Theodor Thornhill]

branch: emacs-29
commit 6adc193ad66445acd84caba6973424ecbd21da26
Author: Theodor Thornhill <theo@thornhill.no>
Commit: Theodor Thornhill <theo@thornhill.no>

    Move c-like common utils into own library (bug#60961)
    
    * lisp/progmodes/c-ts-common.el: New file.
    * lisp/progmodes/c-ts-mode.el (treesit-induce-sparse-tree): Remove
    unused declaration.
    (c-ts-mode--indent-styles): Refer to the new library.
    (c-ts-mode--looking-at-star,
    c-ts-mode--comment-start-after-first-star,
    c-ts-mode--comment-2nd-line-matcher,
    c-ts-mode--comment-2nd-line-anchor, c-ts-mode--comment-regexp,
    c-ts-mode--fill-paragraph, c-ts-mode--fill-block-comment): Move to
    c-ts-common and expose as public.
    (c-ts-mode-comment-setup): Move to c-ts-common.
    * lisp/progmodes/csharp-mode.el (c-ts-common): Require new library.
    (csharp-ts-mode--indent-rules): Refer to the new symbols.
    (csharp-ts-mode): Use new function.
    * lisp/progmodes/java-ts-mode.el (c-ts-common): Require new library.
    (java-ts-mode--indent-rules): Refer to the new symbols.
    (java-ts-mode): Use new function.
    * lisp/progmodes/js.el (c-ts-common): Require new library.
    (js--treesit-indent-rules): Refer to the new symbols.
    (js-ts-mode): Use new function.
    * lisp/progmodes/rust-ts-mode.el (c-ts-common): Require new library.
    (rust-ts-mode--indent-rules): Refer to the new symbols.
    (rust-ts-mode): Use new function.
    * lisp/progmodes/typescript-ts-mode.el (c-ts-common): Require new
    library.
    (typescript-ts-mode--indent-rules): Refer to the new symbols.
    (typescript-ts-base-mode): Use new function.
---
 lisp/progmodes/c-ts-common.el        | 247 +++++++++++++++++++++++++++++++++++
 lisp/progmodes/c-ts-mode.el          | 228 ++------------------------------
 lisp/progmodes/csharp-mode.el        |   8 +-
 lisp/progmodes/java-ts-mode.el       |   8 +-
 lisp/progmodes/js.el                 |   8 +-
 lisp/progmodes/rust-ts-mode.el       |   8 +-
 lisp/progmodes/typescript-ts-mode.el |   8 +-
 7 files changed, 275 insertions(+), 240 deletions(-)

diff --git a/lisp/progmodes/c-ts-common.el b/lisp/progmodes/c-ts-common.el
new file mode 100644
index 00000000000..6671d4be5b6
--- /dev/null
+++ b/lisp/progmodes/c-ts-common.el
@@ -0,0 +1,247 @@
+;;; c-ts-common.el --- Utilities for C like Languages  -*- lexical-binding: t; 
-*-
+
+;; Copyright (C) 2023 Free Software Foundation, Inc.
+
+;; Author     : 付禹安 (Yuan Fu) <casouri@gmail.com>
+;; Keywords   : c c++ java javascript rust 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:
+;;
+;; For C-like language major modes:
+;;
+;; - Use `c-ts-common-comment-setup' to setup comment variables and
+;;   filling.
+;;
+;; - Use simple-indent matcher `c-ts-common-looking-at-star' and
+;;   anchor `c-ts-common-comment-start-after-first-star' for indenting
+;;   block comments.  See `c-ts-mode--indent-styles' for example.
+
+;;; Code:
+
+(require 'treesit)
+(eval-when-compile (require 'rx))
+
+(declare-function treesit-node-start "treesit.c")
+(declare-function treesit-node-end "treesit.c")
+(declare-function treesit-node-type "treesit.c")
+
+(defun c-ts-common-looking-at-star (_n _p bol &rest _)
+  "A tree-sitter simple indent matcher.
+Matches if there is a \"*\" after BOL."
+  (eq (char-after bol) ?*))
+
+(defun c-ts-common-comment-start-after-first-star (_n parent &rest _)
+  "A tree-sitter simple indent anchor.
+Finds the \"/*\" and returns the point after the \"*\".
+Assumes PARENT is a comment node."
+  (save-excursion
+    (goto-char (treesit-node-start parent))
+    (if (looking-at (rx "/*"))
+        (match-end 0)
+      (point))))
+
+(defun c-ts-common-comment-2nd-line-matcher (_n parent &rest _)
+  "Matches if point is at the second line of a block comment.
+PARENT should be a comment node."
+  (and (equal (treesit-node-type parent) "comment")
+       (save-excursion
+         (forward-line -1)
+         (back-to-indentation)
+         (eq (point) (treesit-node-start parent)))))
+
+(defun c-ts-common-comment-2nd-line-anchor (_n _p bol &rest _)
+  "Return appropriate anchor for the second line of a comment.
+
+If the first line is /* alone, return the position right after
+the star; if the first line is /* followed by some text, return
+the position right before the text minus 1.
+
+Use an offset of 1 with this anchor.  BOL is the beginning of
+non-whitespace characters of the current line."
+  (save-excursion
+    (forward-line -1)
+    (back-to-indentation)
+    (when (looking-at comment-start-skip)
+      (goto-char (match-end 0))
+      (if (looking-at (rx (* (or " " "\t")) eol))
+          ;; Only /* at the first line.
+          (progn (skip-chars-backward " \t")
+                 (if (save-excursion
+                       (goto-char bol)
+                       (looking-at (rx "*")))
+                     ;; The common case.  Checked by "Multiline Block
+                     ;; Comments 4".
+                     (point)
+                   ;; The "Multiline Block Comments 2" test in
+                   ;; c-ts-common-resources/indent.erts checks this.
+                   (1- (point))))
+        ;; There is something after /* at the first line.  The
+        ;; "Multiline Block Comments 3" test checks this.
+        (1- (point))))))
+
+(defvar c-ts-common--comment-regexp
+  ;; These covers C/C++, Java, JavaScript, TypeScript, Rust, C#.
+  (rx (or "comment" "line_comment" "block_comment"))
+  "Regexp pattern that matches a comment in C-like languages.")
+
+(defun c-ts-common--fill-paragraph (&optional arg)
+  "Fillling function for `c-ts-common'.
+ARG is passed to `fill-paragraph'."
+  (interactive "*P")
+  (save-restriction
+    (widen)
+    (let ((node (treesit-node-at (point))))
+      (when (string-match-p c-ts-common--comment-regexp
+                            (treesit-node-type node))
+        (if (save-excursion
+              (goto-char (treesit-node-start node))
+              (looking-at "//"))
+            (fill-comment-paragraph arg)
+          (c-ts-common--fill-block-comment arg)))
+      ;; Return t so `fill-paragraph' doesn't attempt to fill by
+      ;; itself.
+      t)))
+
+(defun c-ts-common--fill-block-comment (&optional arg)
+  "Fillling function for block comments.
+ARG is passed to `fill-paragraph'.  Assume point is in a block
+comment."
+  (let* ((node (treesit-node-at (point)))
+         (start (treesit-node-start node))
+         (end (treesit-node-end node))
+         ;; Bind to nil to avoid infinite recursion.
+         (fill-paragraph-function nil)
+         (orig-point (point-marker))
+         (start-marker (point-marker))
+         (end-marker nil)
+         (end-len 0))
+    (move-marker start-marker start)
+    ;; We mask "/*" and the space before "*/" like
+    ;; `c-fill-paragraph' does.
+    (atomic-change-group
+      ;; Mask "/*".
+      (goto-char start)
+      (when (looking-at (rx (* (syntax whitespace))
+                            (group "/") "*"))
+        (goto-char (match-beginning 1))
+        (move-marker start-marker (point))
+        (replace-match " " nil nil nil 1))
+      ;; Include whitespaces before /*.
+      (goto-char start)
+      (beginning-of-line)
+      (setq start (point))
+      ;; Mask spaces before "*/" if it is attached at the end
+      ;; of a sentence rather than on its own line.
+      (goto-char end)
+      (when (looking-back (rx (not (syntax whitespace))
+                              (group (+ (syntax whitespace)))
+                              "*/")
+                          (line-beginning-position))
+        (goto-char (match-beginning 1))
+        (setq end-marker (point-marker))
+        (setq end-len (- (match-end 1) (match-beginning 1)))
+        (replace-match (make-string end-len ?x)
+                       nil nil nil 1))
+      ;; If "*/" is on its own line, don't included it in the
+      ;; filling region.
+      (when (not end-marker)
+        (goto-char end)
+        (when (looking-back (rx "*/") 2)
+          (backward-char 2)
+          (skip-syntax-backward "-")
+          (setq end (point))))
+      ;; Let `fill-paragraph' do its thing.
+      (goto-char orig-point)
+      (narrow-to-region start end)
+      ;; We don't want to fill the region between START and
+      ;; START-MARKER, otherwise the filling function might delete
+      ;; some spaces there.
+      (fill-region start-marker end arg)
+      ;; Unmask.
+      (when start-marker
+        (goto-char start-marker)
+        (delete-char 1)
+        (insert "/"))
+      (when end-marker
+        (goto-char end-marker)
+        (delete-region (point) (+ end-len (point)))
+        (insert (make-string end-len ?\s))))))
+
+(defun c-ts-common-comment-setup ()
+  "Set up local variables for C-like comment.
+
+Set up:
+ - `comment-start'
+ - `comment-end'
+ - `comment-start-skip'
+ - `comment-end-skip'
+ - `adaptive-fill-mode'
+ - `adaptive-fill-first-line-regexp'
+ - `paragraph-start'
+ - `paragraph-separate'
+ - `fill-paragraph-function'"
+  (setq-local comment-start "// ")
+  (setq-local comment-end "")
+  (setq-local comment-start-skip (rx (or (seq "/" (+ "/"))
+                                         (seq "/" (+ "*")))
+                                     (* (syntax whitespace))))
+  (setq-local comment-end-skip
+              (rx (* (syntax whitespace))
+                  (group (or (syntax comment-end)
+                             (seq (+ "*") "/")))))
+  (setq-local adaptive-fill-mode t)
+  ;; This matches (1) empty spaces (the default), (2) "//", (3) "*",
+  ;; but do not match "/*", because we don't want to use "/*" as
+  ;; prefix when filling.  (Actually, it doesn't matter, because
+  ;; `comment-start-skip' matches "/*" which will cause
+  ;; `fill-context-prefix' to use "/*" as a prefix for filling, that's
+  ;; why we mask the "/*" in `c-ts-common--fill-paragraph'.)
+  (setq-local adaptive-fill-regexp
+              (concat (rx (* (syntax whitespace))
+                          (group (or (seq "/" (+ "/")) (* "*"))))
+                      adaptive-fill-regexp))
+  ;; Note the missing * comparing to `adaptive-fill-regexp'.  The
+  ;; reason for its absence is a bit convoluted to explain.  Suffice
+  ;; to say that without it, filling a single line paragraph that
+  ;; starts with /* doesn't insert * at the beginning of each
+  ;; following line, and filling a multi-line paragraph whose first
+  ;; two lines start with * does insert * at the beginning of each
+  ;; following line.  If you know how does adaptive filling works, you
+  ;; know what I mean.
+  (setq-local adaptive-fill-first-line-regexp
+              (rx bos
+                  (seq (* (syntax whitespace))
+                       (group (seq "/" (+ "/")))
+                       (* (syntax whitespace)))
+                  eos))
+  ;; Same as `adaptive-fill-regexp'.
+  (setq-local paragraph-start
+              (rx (or (seq (* (syntax whitespace))
+                           (group (or (seq "/" (+ "/")) (* "*")))
+                           (* (syntax whitespace))
+                           ;; Add this eol so that in
+                           ;; `fill-context-prefix', `paragraph-start'
+                           ;; doesn't match the prefix.
+                           eol)
+                      "\f")))
+  (setq-local paragraph-separate paragraph-start)
+  (setq-local fill-paragraph-function #'c-ts-common--fill-paragraph))
+
+(provide 'c-ts-common)
+
+;;; c-ts-common.el ends here
diff --git a/lisp/progmodes/c-ts-mode.el b/lisp/progmodes/c-ts-mode.el
index 8ddd622a05a..03793d61ba3 100644
--- a/lisp/progmodes/c-ts-mode.el
+++ b/lisp/progmodes/c-ts-mode.el
@@ -64,26 +64,18 @@
 ;; files, provided that you have the corresponding parser grammar
 ;; libraries installed.
 ;;
-;; For C-like language major modes:
-;;
-;; - Use `c-ts-mode-comment-setup' to setup comment variables and
-;;   filling.
-;;
-;; - Use simple-indent matcher `c-ts-mode--looking-at-star' and anchor
-;;   `c-ts-mode--comment-start-after-first-star' for indenting block
-;;   comments.  See `c-ts-mode--indent-styles' for example.
-;;
 ;; - Use variable `c-ts-mode-indent-block-type-regexp' with indent
 ;;   offset c-ts-mode--statement-offset for indenting statements.
 ;;   Again, see `c-ts-mode--indent-styles' for example.
+;;
 
 ;;; Code:
 
 (require 'treesit)
+(require 'c-ts-common)
 (eval-when-compile (require 'rx))
 
 (declare-function treesit-parser-create "treesit.c")
-(declare-function treesit-induce-sparse-tree "treesit.c")
 (declare-function treesit-node-parent "treesit.c")
 (declare-function treesit-node-start "treesit.c")
 (declare-function treesit-node-end "treesit.c")
@@ -173,12 +165,12 @@ MODE is either `c' or `cpp'."
            ((node-is "else") parent-bol 0)
            ((node-is "case") parent-bol 0)
            ((node-is "preproc_arg") no-indent)
-           ;; `c-ts-mode--looking-at-star' has to come before
-           ;; `c-ts-mode--comment-2nd-line-matcher'.
+           ;; `c-ts-common-looking-at-star' has to come before
+           ;; `c-ts-common-comment-2nd-line-matcher'.
            ((and (parent-is "comment") c-ts-mode--looking-at-star)
-            c-ts-mode--comment-start-after-first-star -1)
-           (c-ts-mode--comment-2nd-line-matcher
-            c-ts-mode--comment-2nd-line-anchor
+            c-ts-common-comment-start-after-first-star -1)
+           (c-ts-common-comment-2nd-line-matcher
+            c-ts-common-comment-2nd-line-anchor
             1)
            ((parent-is "comment") prev-adaptive-prefix 0)
 
@@ -333,60 +325,6 @@ PARENT is NODE's parent."
   (- (c-ts-mode--statement-offset node parent)
      c-ts-mode-indent-offset))
 
-(defun c-ts-mode--looking-at-star (_n _p bol &rest _)
-  "A tree-sitter simple indent matcher.
-Matches if there is a \"*\" after BOL."
-  (eq (char-after bol) ?*))
-
-(defun c-ts-mode--comment-start-after-first-star (_n parent &rest _)
-  "A tree-sitter simple indent anchor.
-Finds the \"/*\" and returns the point after the \"*\".
-Assumes PARENT is a comment node."
-  (save-excursion
-    (goto-char (treesit-node-start parent))
-    (if (looking-at (rx "/*"))
-        (match-end 0)
-      (point))))
-
-(defun c-ts-mode--comment-2nd-line-matcher (_n parent &rest _)
-  "Matches if point is at the second line of a block comment.
-PARENT should be a comment node."
-  (and (equal (treesit-node-type parent) "comment")
-       (save-excursion
-         (forward-line -1)
-         (back-to-indentation)
-         (eq (point) (treesit-node-start parent)))))
-
-(defun c-ts-mode--comment-2nd-line-anchor (_n _p bol &rest _)
-  "Return appropriate anchor for the second line of a comment.
-
-If the first line is /* alone, return the position right after
-the star; if the first line is /* followed by some text, return
-the position right before the text minus 1.
-
-Use an offset of 1 with this anchor.  BOL is the beginning of
-non-whitespace characters of the current line."
-  (save-excursion
-    (forward-line -1)
-    (back-to-indentation)
-    (when (looking-at comment-start-skip)
-      (goto-char (match-end 0))
-      (if (looking-at (rx (* (or " " "\t")) eol))
-          ;; Only /* at the first line.
-          (progn (skip-chars-backward " \t")
-                 (if (save-excursion
-                       (goto-char bol)
-                       (looking-at (rx "*")))
-                     ;; The common case.  Checked by "Multiline Block
-                     ;; Comments 4".
-                     (point)
-                   ;; The "Multiline Block Comments 2" test in
-                   ;; c-ts-mode-resources/indent.erts checks this.
-                   (1- (point))))
-        ;; There is something after /* at the first line.  The
-        ;; "Multiline Block Comments 3" test checks this.
-        (1- (point))))))
-
 ;;; Font-lock
 
 (defvar c-ts-mode--preproc-keywords
@@ -782,156 +720,6 @@ the semicolon.  This function skips the semicolon."
                    (treesit-node-end node))
     (goto-char orig-point)))
 
-;;; Filling
-
-(defvar c-ts-mode--comment-regexp
-  ;; These covers C/C++, Java, JavaScript, TypeScript, Rust, C#.
-  (rx (or "comment" "line_comment" "block_comment"))
-  "Regexp pattern that matches a comment in C-like languages.")
-
-(defun c-ts-mode--fill-paragraph (&optional arg)
-  "Fillling function for `c-ts-mode'.
-ARG is passed to `fill-paragraph'."
-  (interactive "*P")
-  (save-restriction
-    (widen)
-    (let ((node (treesit-node-at (point))))
-      (when (string-match-p c-ts-mode--comment-regexp
-                            (treesit-node-type node))
-        (if (save-excursion
-              (goto-char (treesit-node-start node))
-              (looking-at "//"))
-            (fill-comment-paragraph arg)
-          (c-ts-mode--fill-block-comment arg)))
-      ;; Return t so `fill-paragraph' doesn't attempt to fill by
-      ;; itself.
-      t)))
-
-(defun c-ts-mode--fill-block-comment (&optional arg)
-  "Fillling function for block comments.
-ARG is passed to `fill-paragraph'.  Assume point is in a block
-comment."
-  (let* ((node (treesit-node-at (point)))
-         (start (treesit-node-start node))
-         (end (treesit-node-end node))
-         ;; Bind to nil to avoid infinite recursion.
-         (fill-paragraph-function nil)
-         (orig-point (point-marker))
-         (start-marker (point-marker))
-         (end-marker nil)
-         (end-len 0))
-    (move-marker start-marker start)
-    ;; We mask "/*" and the space before "*/" like
-    ;; `c-fill-paragraph' does.
-    (atomic-change-group
-      ;; Mask "/*".
-      (goto-char start)
-      (when (looking-at (rx (* (syntax whitespace))
-                            (group "/") "*"))
-        (goto-char (match-beginning 1))
-        (move-marker start-marker (point))
-        (replace-match " " nil nil nil 1))
-      ;; Include whitespaces before /*.
-      (goto-char start)
-      (beginning-of-line)
-      (setq start (point))
-      ;; Mask spaces before "*/" if it is attached at the end
-      ;; of a sentence rather than on its own line.
-      (goto-char end)
-      (when (looking-back (rx (not (syntax whitespace))
-                              (group (+ (syntax whitespace)))
-                              "*/")
-                          (line-beginning-position))
-        (goto-char (match-beginning 1))
-        (setq end-marker (point-marker))
-        (setq end-len (- (match-end 1) (match-beginning 1)))
-        (replace-match (make-string end-len ?x)
-                       nil nil nil 1))
-      ;; If "*/" is on its own line, don't included it in the
-      ;; filling region.
-      (when (not end-marker)
-        (goto-char end)
-        (when (looking-back (rx "*/") 2)
-          (backward-char 2)
-          (skip-syntax-backward "-")
-          (setq end (point))))
-      ;; Let `fill-paragraph' do its thing.
-      (goto-char orig-point)
-      (narrow-to-region start end)
-      ;; We don't want to fill the region between START and
-      ;; START-MARKER, otherwise the filling function might delete
-      ;; some spaces there.
-      (fill-region start-marker end arg)
-      ;; Unmask.
-      (when start-marker
-        (goto-char start-marker)
-        (delete-char 1)
-        (insert "/"))
-      (when end-marker
-        (goto-char end-marker)
-        (delete-region (point) (+ end-len (point)))
-        (insert (make-string end-len ?\s))))))
-
-(defun c-ts-mode-comment-setup ()
-  "Set up local variables for C-like comment.
-
-Set up:
- - `comment-start'
- - `comment-end'
- - `comment-start-skip'
- - `comment-end-skip'
- - `adaptive-fill-mode'
- - `adaptive-fill-first-line-regexp'
- - `paragraph-start'
- - `paragraph-separate'
- - `fill-paragraph-function'"
-  (setq-local comment-start "// ")
-  (setq-local comment-end "")
-  (setq-local comment-start-skip (rx (or (seq "/" (+ "/"))
-                                         (seq "/" (+ "*")))
-                                     (* (syntax whitespace))))
-  (setq-local comment-end-skip
-              (rx (* (syntax whitespace))
-                  (group (or (syntax comment-end)
-                             (seq (+ "*") "/")))))
-  (setq-local adaptive-fill-mode t)
-  ;; This matches (1) empty spaces (the default), (2) "//", (3) "*",
-  ;; but do not match "/*", because we don't want to use "/*" as
-  ;; prefix when filling.  (Actually, it doesn't matter, because
-  ;; `comment-start-skip' matches "/*" which will cause
-  ;; `fill-context-prefix' to use "/*" as a prefix for filling, that's
-  ;; why we mask the "/*" in `c-ts-mode--fill-paragraph'.)
-  (setq-local adaptive-fill-regexp
-              (concat (rx (* (syntax whitespace))
-                          (group (or (seq "/" (+ "/")) (* "*"))))
-                      adaptive-fill-regexp))
-  ;; Note the missing * comparing to `adaptive-fill-regexp'.  The
-  ;; reason for its absence is a bit convoluted to explain.  Suffice
-  ;; to say that without it, filling a single line paragraph that
-  ;; starts with /* doesn't insert * at the beginning of each
-  ;; following line, and filling a multi-line paragraph whose first
-  ;; two lines start with * does insert * at the beginning of each
-  ;; following line.  If you know how does adaptive filling works, you
-  ;; know what I mean.
-  (setq-local adaptive-fill-first-line-regexp
-              (rx bos
-                  (seq (* (syntax whitespace))
-                       (group (seq "/" (+ "/")))
-                       (* (syntax whitespace)))
-                  eos))
-  ;; Same as `adaptive-fill-regexp'.
-  (setq-local paragraph-start
-              (rx (or (seq (* (syntax whitespace))
-                           (group (or (seq "/" (+ "/")) (* "*")))
-                           (* (syntax whitespace))
-                           ;; Add this eol so that in
-                           ;; `fill-context-prefix', `paragraph-start'
-                           ;; doesn't match the prefix.
-                           eol)
-                      "\f")))
-  (setq-local paragraph-separate paragraph-start)
-  (setq-local fill-paragraph-function #'c-ts-mode--fill-paragraph))
-
 ;;; Modes
 
 (defvar-keymap c-ts-mode-map
@@ -968,7 +756,7 @@ Set up:
     (setq-local indent-tabs-mode t))
 
   ;; Comment
-  (c-ts-mode-comment-setup)
+  (c-ts-common-comment-setup)
 
   ;; Electric
   (setq-local electric-indent-chars
diff --git a/lisp/progmodes/csharp-mode.el b/lisp/progmodes/csharp-mode.el
index 04f7f222362..852e893dc25 100644
--- a/lisp/progmodes/csharp-mode.el
+++ b/lisp/progmodes/csharp-mode.el
@@ -34,7 +34,7 @@
 (require 'cc-mode)
 (require 'cc-langs)
 (require 'treesit)
-(require 'c-ts-mode) ; For comment indenting and filling.
+(require 'c-ts-common) ; For comment indenting and filling.
 
 (eval-when-compile
   (require 'cc-fonts)
@@ -634,8 +634,8 @@ compilation and evaluation time conflicts."
      ((node-is "}") parent-bol 0)
      ((node-is ")") parent-bol 0)
      ((node-is "]") parent-bol 0)
-     ((and (parent-is "comment") c-ts-mode--looking-at-star)
-      c-ts-mode--comment-start-after-first-star -1)
+     ((and (parent-is "comment") c-ts-common-looking-at-star)
+      c-ts-common-comment-start-after-first-star -1)
      ((parent-is "comment") prev-adaptive-prefix 0)
      ((parent-is "namespace_declaration") parent-bol 0)
      ((parent-is "class_declaration") parent-bol 0)
@@ -908,7 +908,7 @@ Key bindings:
   (treesit-parser-create 'c-sharp)
 
   ;; Comments.
-  (c-ts-mode-comment-setup)
+  (c-ts-common-comment-setup)
 
   ;; Indent.
   (setq-local treesit-simple-indent-rules csharp-ts-mode--indent-rules)
diff --git a/lisp/progmodes/java-ts-mode.el b/lisp/progmodes/java-ts-mode.el
index 8251d9603c3..af2b0c1fa8d 100644
--- a/lisp/progmodes/java-ts-mode.el
+++ b/lisp/progmodes/java-ts-mode.el
@@ -29,7 +29,7 @@
 
 (require 'treesit)
 (eval-when-compile (require 'rx))
-(require 'c-ts-mode) ; For comment indent and filling.
+(require 'c-ts-common) ; For comment indent and filling.
 
 (declare-function treesit-parser-create "treesit.c")
 (declare-function treesit-induce-sparse-tree "treesit.c")
@@ -73,8 +73,8 @@
      ((node-is "}") (and parent parent-bol) 0)
      ((node-is ")") parent-bol 0)
      ((node-is "]") parent-bol 0)
-     ((and (parent-is "comment") c-ts-mode--looking-at-star)
-      c-ts-mode--comment-start-after-first-star -1)
+     ((and (parent-is "comment") c-ts-common-looking-at-star)
+      c-ts-common-comment-start-after-first-star -1)
      ((parent-is "comment") prev-adaptive-prefix 0)
      ((parent-is "text_block") no-indent)
      ((parent-is "class_body") parent-bol java-ts-mode-indent-offset)
@@ -293,7 +293,7 @@ Return nil if there is no name or if NODE is not a defun 
node."
   (treesit-parser-create 'java)
 
   ;; Comments.
-  (c-ts-mode-comment-setup)
+  (c-ts-common-comment-setup)
 
   ;; Indent.
   (setq-local treesit-simple-indent-rules java-ts-mode--indent-rules)
diff --git a/lisp/progmodes/js.el b/lisp/progmodes/js.el
index 176024863f1..b5c912b8b0d 100644
--- a/lisp/progmodes/js.el
+++ b/lisp/progmodes/js.el
@@ -54,7 +54,7 @@
 (require 'json)
 (require 'prog-mode)
 (require 'treesit)
-(require 'c-ts-mode) ; For comment indent and filling.
+(require 'c-ts-common) ; For comment indent and filling.
 
 (eval-when-compile
   (require 'cl-lib)
@@ -3428,8 +3428,8 @@ This function is intended for use in 
`after-change-functions'."
        ((node-is ")") parent-bol 0)
        ((node-is "]") parent-bol 0)
        ((node-is ">") parent-bol 0)
-       ((and (parent-is "comment") c-ts-mode--looking-at-star)
-        c-ts-mode--comment-start-after-first-star -1)
+       ((and (parent-is "comment") c-ts-common-looking-at-star)
+        c-ts-common-comment-start-after-first-star -1)
        ((parent-is "comment") prev-adaptive-prefix 0)
        ((parent-is "ternary_expression") parent-bol js-indent-level)
        ((parent-is "member_expression") parent-bol js-indent-level)
@@ -3806,7 +3806,7 @@ Currently there are `js-mode' and `js-ts-mode'."
     ;; Which-func.
     (setq-local which-func-imenu-joiner-function #'js--which-func-joiner)
     ;; Comment.
-    (c-ts-mode-comment-setup)
+    (c-ts-common-comment-setup)
     (setq-local comment-multi-line t)
     ;; Electric-indent.
     (setq-local electric-indent-chars
diff --git a/lisp/progmodes/rust-ts-mode.el b/lisp/progmodes/rust-ts-mode.el
index 08590ae6a86..3a6cb61b719 100644
--- a/lisp/progmodes/rust-ts-mode.el
+++ b/lisp/progmodes/rust-ts-mode.el
@@ -29,7 +29,7 @@
 
 (require 'treesit)
 (eval-when-compile (require 'rx))
-(require 'c-ts-mode) ; For comment indent and filling.
+(require 'c-ts-common) ; For comment indent and filling.
 
 (declare-function treesit-parser-create "treesit.c")
 (declare-function treesit-induce-sparse-tree "treesit.c")
@@ -71,8 +71,8 @@
      ((node-is ")") parent-bol 0)
      ((node-is "]") parent-bol 0)
      ((node-is "}") (and parent parent-bol) 0)
-     ((and (parent-is "comment") c-ts-mode--looking-at-star)
-      c-ts-mode--comment-start-after-first-star -1)
+     ((and (parent-is "comment") c-ts-common-looking-at-star)
+      c-ts-common-comment-start-after-first-star -1)
      ((parent-is "comment") prev-adaptive-prefix 0)
      ((parent-is "arguments") parent-bol rust-ts-mode-indent-offset)
      ((parent-is "await_expression") parent-bol rust-ts-mode-indent-offset)
@@ -285,7 +285,7 @@ Return nil if there is no name or if NODE is not a defun 
node."
     (treesit-parser-create 'rust)
 
     ;; Comments.
-    (c-ts-mode-comment-setup)
+    (c-ts-common-comment-setup)
 
     ;; Font-lock.
     (setq-local treesit-font-lock-settings rust-ts-mode--font-lock-settings)
diff --git a/lisp/progmodes/typescript-ts-mode.el 
b/lisp/progmodes/typescript-ts-mode.el
index 903be93422d..34030968806 100644
--- a/lisp/progmodes/typescript-ts-mode.el
+++ b/lisp/progmodes/typescript-ts-mode.el
@@ -30,7 +30,7 @@
 (require 'treesit)
 (require 'js)
 (eval-when-compile (require 'rx))
-(require 'c-ts-mode) ; For comment indent and filling.
+(require 'c-ts-common) ; For comment indent and filling.
 
 (declare-function treesit-parser-create "treesit.c")
 
@@ -74,8 +74,8 @@ Argument LANGUAGE is either `typescript' or `tsx'."
      ((node-is ")") parent-bol 0)
      ((node-is "]") parent-bol 0)
      ((node-is ">") parent-bol 0)
-     ((and (parent-is "comment") c-ts-mode--looking-at-star)
-      c-ts-mode--comment-start-after-first-star -1)
+     ((and (parent-is "comment") c-ts-common-looking-at-star)
+      c-ts-common-comment-start-after-first-star -1)
      ((parent-is "comment") prev-adaptive-prefix 0)
      ((parent-is "ternary_expression") parent-bol 
typescript-ts-mode-indent-offset)
      ((parent-is "member_expression") parent-bol 
typescript-ts-mode-indent-offset)
@@ -321,7 +321,7 @@ Argument LANGUAGE is either `typescript' or `tsx'."
   :syntax-table typescript-ts-mode--syntax-table
 
   ;; Comments.
-  (c-ts-mode-comment-setup)
+  (c-ts-common-comment-setup)
 
   ;; Electric
   (setq-local electric-indent-chars