From 9be16987624511eb48c99d2e4585761bb725872e Mon Sep 17 00:00:00 2001
From: Dan Helfman <witten@torsion.org>
Date: Wed, 20 May 2026 21:00:16 -0700
Subject: [PATCH] Add syntax highlighting to previews.

---
 borgmatic/actions/browse/controller.py | 2 +-
 borgmatic/actions/browse/view.py       | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/borgmatic/actions/browse/controller.py b/borgmatic/actions/browse/controller.py
index 35273c5a..6716febe 100644
--- a/borgmatic/actions/browse/controller.py
+++ b/borgmatic/actions/browse/controller.py
@@ -70,7 +70,7 @@ def get_archive_files(config, repository, archive_name, list_path=None):
         )
 
 
-READLINES_HINT_BYTES = 1000
+READLINES_HINT_BYTES = 2000
 
 
 def get_archive_file_content(config, repository, archive_name, file_path):
diff --git a/borgmatic/actions/browse/view.py b/borgmatic/actions/browse/view.py
index b665e84f..fe9fb722 100644
--- a/borgmatic/actions/browse/view.py
+++ b/borgmatic/actions/browse/view.py
@@ -6,6 +6,7 @@ import logging
 
 import borgmatic.actions.browse.controller
 
+import rich.syntax
 import rich.text
 import textual._context
 import textual.app
@@ -129,7 +130,8 @@ def load_file_preview(browse_app, file_preview, config, repository, archive_name
     file_content = borgmatic.actions.browse.controller.get_archive_file_content(config, repository, archive_name, file_path)
 
     browse_app.call_from_thread(timer.stop)
-    browse_app.call_from_thread(file_preview.update, file_content)
+    syntax_lexer = rich.syntax.Syntax.guess_lexer(file_path, file_content)
+    browse_app.call_from_thread(file_preview.update, rich.syntax.Syntax(file_content, syntax_lexer))
 
 
 OPTION_LIST_BINDINGS = textual.widgets.OptionList.BINDINGS + [