- Refactored

- Removed simplify_settings because it caused issues, and it's impossible to fully handle properly

src/ansi_string/ansi_string.py

@@ -931,6 +931,13 @@ def __eq__(self, value) -> bool:
                 return value.add == self.add and value.rem == self.rem
             return False
 
+        def insert_settings(self, apply:bool, settings:'AnsiString.Settings', topmost:bool=True):
+            lst = self.add if apply else self.rem
+            if topmost:
+                lst.append(settings)
+            else:
+                lst.insert(0, settings)
+
     def __init__(self, s:str='', *setting_or_settings:Union[List[str], str, List[int], int, List[AnsiFormat], AnsiFormat]):
         self._s = s
         # Key is the string index to make a color change at
@@ -974,16 +981,6 @@ def base_str(self) -> str:
     def copy(self) -> 'AnsiString':
         return self[:]
 
-    @staticmethod
-    def _insert_settings_to_dict(settings_dict:Dict[int,'AnsiString.SettingPoint'], idx:int, apply:bool, settings:Settings, topmost:bool=True):
-        if idx not in settings_dict:
-            settings_dict[idx] = __class__.SettingPoint()
-        lst = settings_dict[idx].add if apply else settings_dict[idx].rem
-        if topmost:
-            lst.append(settings)
-        else:
-            lst.insert(0, settings)
-
     @staticmethod
     def _shift_settings_idx(settings_dict:Dict[int,'AnsiString.SettingPoint'], num:int, keep_origin:bool):
         '''
@@ -996,7 +993,9 @@ def _shift_settings_idx(settings_dict:Dict[int,'AnsiString.SettingPoint'], num:i
                 settings_dict[new_key] = settings_dict.pop(key)
 
     def _insert_settings(self, idx:int, apply:bool, settings:Settings, topmost:bool=True):
-        __class__._insert_settings_to_dict(self._color_settings, idx, apply, settings, topmost)
+        if idx not in self._color_settings:
+            self._color_settings[idx] = __class__.SettingPoint()
+        self._color_settings[idx].insert_settings(apply, settings, topmost)
 
     def apply_formatting(
             self,
@@ -1404,40 +1403,6 @@ def istitle(self) -> bool:
     def isupper(self) -> bool:
         return self._s.isupper()
 
-    def simplify_settings(self):
-        '''
-        Attempts to simplify ANSI formatting settings by removing redundant parameters. This does nothing to interrogate
-        custom formatting strings that were applied using "[" string prefix.
-        '''
-        previous_settings = [[],[]]
-        for idx, settings, current_settings in __class__.SettingsIterator(self._color_settings):
-            apply_list_original = list(settings.add)
-
-            # Remove settings that are redundantly reapplied
-            self._color_settings[idx].add = [
-                s for s in settings.add if s not in previous_settings
-            ]
-
-            # Remove settings that are being applied and removed within the same index
-            remove_list = settings.rem
-            self._color_settings[idx].add = [
-                v for v in settings.add if v not in remove_list
-            ]
-            self._color_settings[idx].rem = [
-                v for v in settings.rem if v not in apply_list_original
-            ]
-
-            # Save for next loop
-            previous_settings = list(current_settings)
-
-        # Remove now empty indices
-        for idx in list(self._color_settings.keys()):
-            if (
-                not self._color_settings[idx].add
-                and not self._color_settings[idx].rem
-            ):
-                del self._color_settings[idx]
-
     def __add__(self, value:Union[str,'AnsiString']) -> 'AnsiString':
         cpy = self.copy()
         cpy += value
@@ -1456,7 +1421,6 @@ def __iadd__(self, value:Union[str,'AnsiString']) -> 'AnsiString':
                     self._color_settings[key].rem.extend(value.rem)
                 else:
                     self._color_settings[key] = value
-            self.simplify_settings()
         else:
             raise ValueError(f'value is invalid type: {type(value)}')
         return self

tests/test_ansi_string.py

@@ -314,8 +314,12 @@ def test_iterate(self):
         # Recreate the original string by iterating the characters
         for c in s:
             s2 += c
-        # Should have created a whole new copy of the original
-        self.assertEqual(str(s), str(s2))
+        # This will look the same, even though each character now has formatting
+        self.assertEqual(
+            str(s2),
+            '\x1b[43mo\x1b[0;43mn\x1b[0;43me\x1b[0;43m \x1b[0;4mt\x1b[0;4mw\x1b[0;4mo\x1b[0;4m \x1b[0;1mt\x1b[0;1mh'
+            '\x1b[0;1mr\x1b[0;1me\x1b[0;1me\x1b[m'
+        )
         self.assertIsNot(s, s2)
 
     def test_apply_string_equal_length(self):
@@ -361,6 +365,11 @@ def test_remove_suffix_not_found(self):
         self.assertEqual(str(s), '\x1b[14mblah blah\x1b[m')
         self.assertIsNot(s, s2)
 
+    def test_cat_edge_case(self):
+        a = AnsiString('a', 'red')
+        b = AnsiString('b', 'red')
+        c = a + b
+        self.assertEqual(str(c), '\x1b[31ma\x1b[0;31mb\x1b[m')
 
 
 if __name__ == '__main__':