bug#75191: [PATCH] Add expression handling to heex-ts-mode

[Wilhelm Kirschbaum <wkirschbaum@gmail.com>]

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This patch is to handle the recent update to the heex grammar:
https://github.com/phoenixframework/tree-sitter-heex/releases/tag/v0.7.0

This change appears to be backwards compatible.

Kind regards,
Wilhelm

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From 7e1fd814d19e820a6b17d62ce4229ae1daaef5cf Mon Sep 17 00:00:00 2001
From: Wilhelm Kirschbaum <wkirschbaum@gmail.com>
Date: Mon, 30 Dec 2024 12:45:08 +0200
Subject: [PATCH] Add expression handling to heex-ts-mode

On the latest update of the grammar expressions were added and won't be
seen as directives anymore.

* lisp/progmodes/heex-ts-mode.el
(heex-ts--sexp-regexp): Match on expression as well.
(heex-ts--indent-rules): Indent on expression end.
* test/lisp/progmodes/heex-ts-mode-resources/indent.erts: Add expression
indent test.
---
 lisp/progmodes/heex-ts-mode.el                   |  3 ++-
 .../progmodes/heex-ts-mode-resources/indent.erts | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lisp/progmodes/heex-ts-mode.el b/lisp/progmodes/heex-ts-mode.el
index b527d96b579..797bfd6c8ff 100644
--- a/lisp/progmodes/heex-ts-mode.el
+++ b/lisp/progmodes/heex-ts-mode.el
@@ -54,7 +54,7 @@ heex-ts-indent-offset
 (defconst heex-ts--sexp-regexp
   (rx bol
       (or "directive" "tag" "component" "slot"
-          "attribute" "attribute_value" "quoted_attribute_value")
+          "attribute" "attribute_value" "quoted_attribute_value" "expression")
       eol))
 
 ;; There seems to be no parent directive block for tree-sitter-heex,
@@ -81,6 +81,7 @@ heex-ts--indent-rules
        ((node-is "end_slot") parent-bol 0)
        ((node-is "/>") parent-bol 0)
        ((node-is ">") parent-bol 0)
+       ((node-is "}") parent-bol 0)
        ((parent-is "comment") prev-adaptive-prefix 0)
        ((parent-is "component") parent-bol ,offset)
        ((parent-is "tag") parent-bol ,offset)
diff --git a/test/lisp/progmodes/heex-ts-mode-resources/indent.erts b/test/lisp/progmodes/heex-ts-mode-resources/indent.erts
index 500ddb2b536..7fef6571933 100644
--- a/test/lisp/progmodes/heex-ts-mode-resources/indent.erts
+++ b/test/lisp/progmodes/heex-ts-mode-resources/indent.erts
@@ -45,3 +45,19 @@ Name: Slots
   </:bar>
 </Foo>
 =-=-=
+
+Name: Expression
+
+=-=
+<div>
+{
+@bar
+}
+</div>
+=-=
+<div>
+  {
+    @bar
+  }
+</div>
+=-=-=
-- 
2.45.2