Allow updating the AttributedTextWidget's text

cheuph/widgets/attributed_text_widget.py

@@ -1,4 +1,4 @@
-from typing import Any
+from typing import Any, List, Tuple, Union
 
 import urwid
 
@@ -26,10 +26,44 @@ class AttributedTextWidget(urwid.Text):
         work the same way.
         """
 
-        chunk_info = [
-                chunk.text if style is None else (style, chunk.text)
-                for chunk, style in text.split_by("style")
+        self._attributed_text = text
+        super().__init__(self._convert_to_markup(text), *args, **kwargs)
+
+    @staticmethod
+    def _convert_to_markup(text: AttributedText
+            ) -> List[Union[str, Tuple[str, str]]]:
+
+        # Wonder why it can't figure out the type signature of markup on its
+        # own... :P
+        markup: List[Union[str, Tuple[str, str]]]
+        markup = [
+                segment.text if style is None else (style, segment.text)
+                for segment, style in text.split_by("style")
         ]
-        super().__init__(chunk_info, *args, **kwargs)
+
+        return markup or [""]
+
+    def set_attributed_text(self, text: AttributedText) -> None:
+        """
+        Set the content of the AttributedTextWidget.
+        """
+
+        self._attributed_text = text
+        super().set_text(self._convert_to_markup(text))
+
+    def get_attributed_text(self) -> AttributedText:
+        """
+        Returns the currently used AttributedText.
+
+        urwid.Text's get_text() also returns a run length encoded list of
+        attributes. This is not necessary here because the AttributedText
+        already contains all its attributes.
+        """
+
+        return self._attributed_text
+
+    @property
+    def attributed_text(self) -> AttributedText:
+        return self.get_attributed_text()
 
 ATWidget = AttributedTextWidget