improve highlighting

logFileModel.py

@@ -2,6 +2,8 @@ from typing import List
 import os
 from line import Line
 
+from settings import Settings
+
 
 class LogFileModel:
     def __init__(self, file):
@@ -12,8 +14,8 @@ class LogFileModel:
 
         # TODO handle lines longer than 4096 bytes
         with open(self._file, 'r') as f:
-            offset = max(0, byte_offset - 4096)
-            offset = offset - offset % 4096 # align to blocks of 4kb
+            offset = max(0, byte_offset - Settings.max_line_length())
+            offset = offset - offset % Settings.max_line_length() # align to blocks of 4kb
             f.seek(offset)
             while l := f.readline():
                 new_offset = f.tell()