Leave the emojis in pre-formatted text untouched

ChangeLog.md

@@ -12,6 +12,8 @@
 - Added a `ToggleCosyLinkNumbers` command, which moves the link jump numbers
   over to the left of the link text or back to the right.
   ([#193](https://github.com/davep/rogallo/pull/193))
+- Modified `ToggleEmojiRemoval` so that it *doesn't* remove emojis from
+  pre-formatted text. ([#196](https://github.com/davep/rogallo/pull/196))
 
 ## v0.11.0
 

src/rogallo/widgets/viewer/content_filter.py

@@ -28,6 +28,8 @@ class GemtextContent:
 
     _filter: ContentFilter = ContentFilter(str)
     """The content filter."""
+    _purely_ansi_filter: ContentFilter = ContentFilter(str)
+    """A content filter that only deals with ANSI escape sequences."""
 
     @staticmethod
     def _strip_ansi(text: str) -> str:
@@ -64,12 +66,15 @@ def set_filter(
             strip_emoji: Whether to strip emoji from the content.
         """
         cls._filter = ContentFilter(str)
+        cls._purely_ansi_filter = ContentFilter(str)
         if strip_emoji:
             cls._filter |= cls._strip_emoji
         if allow_ansi_escape_sequences:
             cls._filter |= Text.from_ansi
+            cls._purely_ansi_filter |= Text.from_ansi
         else:
             cls._filter |= cls._strip_ansi
+            cls._purely_ansi_filter |= cls._strip_ansi
 
     @classmethod
     def filter(cls, line: Line) -> str | Text:
@@ -80,5 +85,14 @@ def filter(cls, line: Line) -> str | Text:
         """
         return cls._filter(line)
 
+    @classmethod
+    def ansi_filter(cls, line: Line) -> str | Text:
+        """Filter a Gemtext line, affecting only ANSI escape sequences.
+
+        Returns:
+            The filtered line content.
+        """
+        return cls._purely_ansi_filter(line)
+
 
 ### content_filter.py ends here

src/rogallo/widgets/viewer/gemtext_blocks.py

@@ -381,7 +381,7 @@ def __init__(self, preformatted: Line) -> None:
 
     def compose(self) -> ComposeResult:
         """Compose the Gemtext preformatted text widget."""
-        text = GemtextContent.filter(self._preformatted)
+        text = GemtextContent.ansi_filter(self._preformatted)
         yield Label(
             highlight(
                 str(text),