update suggestion method

Author: willmcgugan

CHANGELOG.md

@@ -26,6 +26,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added `DOMNode.displayed_children` https://github.com/Textualize/textual/pull/6070
 - Added `TextArea.UserInsert` message https://github.com/Textualize/textual/pull/6070
 - Added `TextArea.hide_suggestion_on_blur` boolean https://github.com/Textualize/textual/pull/6070
+- Added `OptionList.highlighted_option` property
+- Added `TextArea.update_suggestion` method
 
 ### Changed
 

src/textual/_compositor.py

@@ -630,7 +630,10 @@ def add_widget(
                     placement_scroll_offset = placement_offset - widget.scroll_offset
 
                     placements = [
-                        placement.process_offset(size.region, placement_scroll_offset)
+                        placement.process_offset(
+                            no_clip if styles.overlay == "screen" else size.region,
+                            placement_scroll_offset,
+                        )
                         for placement in placements
                     ]
 

src/textual/widgets/_footer.py

@@ -256,6 +256,8 @@ def compose(self) -> ComposeResult:
                         self.app.get_key_display(binding),
                         "",
                         binding.action,
+                        disabled=not enabled,
+                        tooltip=tooltip or binding.description,
                         classes="-grouped",
                     ).data_bind(Footer.compact)
                 yield FooterLabel(group.description)

src/textual/widgets/_option_list.py

@@ -311,6 +311,18 @@ def option_count(self) -> int:
         """The number of options."""
         return len(self._options)
 
+    @property
+    def highlighted_option(self) -> Option | None:
+        """The currently highlighted options, or `None` if no option is highlighted,
+
+        Returns:
+            An Option, or `None`.
+        """
+        if self.highlighted is not None:
+            return self.options[self.highlighted]
+        else:
+            return None
+
     def clear_options(self) -> Self:
         """Clear the content of the option list.
 

src/textual/widgets/_text_area.py

@@ -662,6 +662,9 @@ def notify_style_update(self) -> None:
         self._line_cache.clear()
         super().notify_style_update()
 
+    def update_suggestion(self) -> None:
+        """An hook to update suggestions."""
+
     def check_consume_key(self, key: str, character: str | None = None) -> bool:
         """Check if the widget may consume the given key.
 
@@ -1074,6 +1077,7 @@ def load_text(self, text: str) -> None:
         self.history.clear()
         self._set_document(text, self.language)
         self.post_message(self.Changed(self).set_sender(self))
+        self.update_suggestion()
 
     def _on_resize(self) -> None:
         self._rewrap_and_refresh_virtual_size()
@@ -1534,7 +1538,10 @@ def edit(self, edit: Edit) -> EditResult:
             Data relating to the edit that may be useful. The data returned
             may be different depending on the edit performed.
         """
-        self.suggestion = ""
+        if self.suggestion.startswith(edit.text):
+            self.suggestion = self.suggestion[len(edit.text) :]
+        else:
+            self.suggestion = ""
         old_gutter_width = self.gutter_width
         result = edit.do(self)
         self.history.record(edit)
@@ -1551,8 +1558,11 @@ def edit(self, edit: Edit) -> EditResult:
 
         self._refresh_size()
         edit.after(self)
+
         self._build_highlight_map()
         self.post_message(self.Changed(self))
+        self.update_suggestion()
+
         return result
 
     def undo(self) -> None:
@@ -1616,6 +1626,7 @@ def _undo_batch(self, edits: Sequence[Edit]) -> None:
             edit.after(self)
         self._build_highlight_map()
         self.post_message(self.Changed(self))
+        self.update_suggestion()
 
     def _redo_batch(self, edits: Sequence[Edit]) -> None:
         """Redo a batch of Edits in order.
@@ -1664,6 +1675,7 @@ def _redo_batch(self, edits: Sequence[Edit]) -> None:
             edit.after(self)
         self._build_highlight_map()
         self.post_message(self.Changed(self))
+        self.update_suggestion()
 
     async def _on_key(self, event: events.Key) -> None:
         """Handle key presses which correspond to document inserts."""