From e57e9c7ddfd5ff79d86c558cefc14800366b57bc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Furga=C5=82a?=
 <83299832+00200200@users.noreply.github.com>
Date: Sun, 11 Oct 2026 16:18:26 +0200
Subject: [PATCH] Fix rename replacement ranges for files without a final
 newline

---
 pylsp/plugins/jedi_rename.py     | 17 ++++++++---------
 test/plugins/test_jedi_rename.py | 29 ++++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/pylsp/plugins/jedi_rename.py b/pylsp/plugins/jedi_rename.py
index b35e321a..12240388 100644
--- a/pylsp/plugins/jedi_rename.py
+++ b/pylsp/plugins/jedi_rename.py
@@ -29,6 +29,7 @@ def pylsp_rename(config, workspace, document, position, new_name):
     for file_path, changed_file in changed_files.items():
         uri = uris.from_fs_path(str(file_path))
         doc = workspace.get_maybe_document(uri)
+        source = workspace.get_document(uri).source
         changes.append(
             {
                 "textDocument": {"uri": uri, "version": doc.version if doc else None},
@@ -36,10 +37,7 @@ def pylsp_rename(config, workspace, document, position, new_name):
                     {
                         "range": {
                             "start": {"line": 0, "character": 0},
-                            "end": {
-                                "line": _num_lines(changed_file.get_new_code()),
-                                "character": 0,
-                            },
+                            "end": _end_position(source),
                         },
                         "newText": changed_file.get_new_code(),
                     }
@@ -49,8 +47,9 @@ def pylsp_rename(config, workspace, document, position, new_name):
     return {"documentChanges": changes}
 
 
-def _num_lines(file_contents):
-    "Count the number of lines in the given string."
-    if _utils.get_eol_chars(file_contents):
-        return len(file_contents.splitlines())
-    return 0
+def _end_position(file_contents):
+    lines = file_contents.replace("\r\n", "\n").replace("\r", "\n").split("\n")
+    return {
+        "line": len(lines) - 1,
+        "character": len(lines[-1].encode("utf-16-le")) // 2,
+    }
diff --git a/test/plugins/test_jedi_rename.py b/test/plugins/test_jedi_rename.py
index 349274be..e284642c 100644
--- a/test/plugins/test_jedi_rename.py
+++ b/test/plugins/test_jedi_rename.py
@@ -7,6 +7,7 @@
 
 from pylsp import uris
 from pylsp.plugins.jedi_rename import pylsp_rename
+from pylsp.text_edit import apply_text_edits
 from pylsp.workspace import Document
 
 DOC_NAME = "test1.py"
@@ -33,6 +34,32 @@ def tmp_workspace(temp_workspace_factory):
     )
 
 
+@pytest.mark.parametrize(
+    ("source", "end"),
+    [
+        ("foo = 12", {"line": 0, "character": 8}),
+        ("foo = 12\nfoo", {"line": 1, "character": 3}),
+        ("foo = 12\r\nfoo", {"line": 1, "character": 3}),
+        ("foo = 12\n", {"line": 1, "character": 0}),
+        ('foo = "\U0001f600\u2028"', {"line": 0, "character": 11}),
+    ],
+)
+def test_jedi_rename_replaces_entire_document(
+    temp_workspace_factory, config, source, end
+):
+    workspace = temp_workspace_factory({"rename.py": source})
+    uri = uris.from_fs_path(os.path.join(workspace.root_path, "rename.py"))
+    doc = workspace.get_document(uri)
+
+    result = pylsp_rename(
+        config, workspace, doc, {"line": 0, "character": 0}, "renamed"
+    )
+
+    edits = result["documentChanges"][0]["edits"]
+    assert apply_text_edits(doc, edits) == source.replace("foo", "renamed")
+    assert edits[0]["range"]["end"] == end
+
+
 def test_jedi_rename(tmp_workspace, config) -> None:
     # rename the `Test1` class
     position = {"line": 0, "character": 6}
@@ -98,7 +125,7 @@ def test_jedi_rename(tmp_workspace, config) -> None:
         {
             "range": {
                 "start": {"line": 0, "character": 0},
-                "end": {"line": 0, "character": 0},
+                "end": {"line": 0, "character": 8},
             },
             "newText": "bar = 12",
         }