Add elm treesitter textobjects (helix-editor#6084)

book/src/generated/lang-support.md

@@ -30,7 +30,7 @@
 | eex | ✓ |  |  |  |
 | ejs | ✓ |  |  |  |
 | elixir | ✓ | ✓ | ✓ | `elixir-ls` |
-| elm | ✓ |  |  | `elm-language-server` |
+| elm | ✓ | ✓ |  | `elm-language-server` |
 | elvish | ✓ |  |  | `elvish` |
 | env | ✓ |  |  |  |
 | erb | ✓ |  |  |  |

runtime/queries/elm/textobjects.scm

@@ -0,0 +1,63 @@
+(line_comment) @comment.inside
+(line_comment)+ @comment.around
+(block_comment) @comment.inside
+(block_comment)+ @comment.around
+
+((type_annotation)?
+  (value_declaration
+    (function_declaration_left (lower_case_identifier))
+    (eq)
+    (_) @function.inside
+  )
+) @function.around
+
+(parenthesized_expr
+  (anonymous_function_expr
+    (
+      (arrow)
+      (_) @function.inside
+    )
+  )
+) @function.around
+
+(value_declaration
+  (function_declaration_left
+    (lower_pattern
+      (lower_case_identifier) @parameter.inside @parameter.around
+    )
+  )
+)
+
+(value_declaration
+  (function_declaration_left
+    (pattern) @parameter.inside @parameter.around
+  )
+)
+
+(value_declaration
+  (function_declaration_left
+    (tuple_pattern
+      (pattern) @parameter.inside
+    ) @parameter.around
+  )
+)
+
+(value_declaration
+  (function_declaration_left
+    (record_pattern
+      (lower_pattern
+        (lower_case_identifier) @parameter.inside
+      )
+    ) @parameter.around
+  )
+)
+
+(parenthesized_expr
+  (anonymous_function_expr
+    (
+      (backslash)
+      (pattern) @parameter.inside
+      (arrow)
+    )
+  )
+)