Merge branch 'main' into fix-get-event-loop-call

Author: graingert

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Fixed `Button` allowing text selection https://github.com/Textualize/textual/pull/5770
 - Fixed running `App.run` after `asyncio.run` https://github.com/Textualize/textual/pull/5799
 - Fixed triggering a deprecation warning in py >= 3.10 https://github.com/Textualize/textual/pull/5799
+- Fixed `Input` invalid cursor position after updating the value https://github.com/Textualize/textual/issues/5811
 
 ## [3.2.0] - 2025-05-02
 

docs/blog/posts/future-of-textualize.md

@@ -0,0 +1,37 @@
+---
+draft: false
+date: 2025-05-07
+title: "The future of Textualize"
+categories:
+  - News
+authors:
+  - willmcgugan
+---
+
+Textual has come a *long* way since I figured why not build an application framework on top of [Rich](https://github.com/Textualize/rich).
+
+Both were initially hobby projects. I mean look how much fun I was having back then:
+
+<!-- more -->
+
+<blockquote class="twitter-tweet" data-media-max-width="560"><p lang="en" dir="ltr">Making good progress with Textual CSS. <br><br>Here&#39;s a &quot;basic&quot; app. The <a href="https://twitter.com/hashtag/Python?src=hash&amp;ref_src=twsrc%5Etfw">#Python</a> + CSS in the screenshots generates the layout in the terminal here.<br><br>Separating the layout and design from the runtime logic will make it easy to create gorgeous TUI apps. 🤩 <a href="https://t.co/Rxnwzs4pXd">pic.twitter.com/Rxnwzs4pXd</a></p>&mdash; Will McGugan (@willmcgugan) <a href="https://twitter.com/willmcgugan/status/1463977921891217411?ref_src=twsrc%5Etfw">November 25, 2021</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
+
+Working on Textual has been a constant source of delight; figuring out how to make a terminal do things that it shouldn't really be able to do, and to a lesser extent a source of frustration when working around the baffling edge cases in emulators and the terminal protocol.
+
+But work around it we did, and now Textual is an awesome piece of software that has spawned a community of developers building TUIs for [all kinds of things](https://github.com/textualize/transcendent-textual) (not to mention, [web apps](https://github.com/Textualize/textual-serve))!
+
+Additionally, Textual has some of the [best docs](https://textual.textualize.io/guide/screens/) for any Open Source project. Shout out to [@squidfunk](https://x.com/squidfunk) and [@pawamoy](https://x.com/pawamoy) for the tech that makes these beautiful docs possible.
+
+Ultimately though a business needs a product. Textual has always been a solution in search of a problem. And while there are plenty of problems to which Textual is a fantastic solution, we weren't able to find a shared problem or pain-point to build a viable business around. Which is why Textualize, the company, will be wrapping up in the next few weeks.
+
+Textual will live on as an Open Source project. In the near term, nothing much will change. I will be maintaining Textual and Rich as I have always done. Software is never finished, but Textual is mature and battle-tested. I'm confident transitioning from a full-time funded project to a community project won't have a negative impact.
+
+## Thanks!
+
+I'd like to thank the awesome devs I worked with at Textualize, and the many developers that followed along, contributing and building apps. Wether you were an early adopter or you just discovered Textual, you made Textual what it is today.
+
+## Get in touch
+
+If you would like to talk Textual, feel free to find me on our [Discord server](https://github.com/textualize/textual/) or the socials.
+
+I've also started a [blog](https://willmcgugan.github.io/) where I will write a little more on this from a more personal perspective.

docs/guide/CSS.md

@@ -297,6 +297,7 @@ Unlike the `id` attribute, a widget's classes can be changed after the widget wa
 - [remove_class()][textual.dom.DOMNode.remove_class] Removes class name(s) from a widget.
 - [toggle_class()][textual.dom.DOMNode.toggle_class] Removes a class name if it is present, or adds the name if it's not already present.
 - [has_class()][textual.dom.DOMNode.has_class] Checks if one or more classes are set on a widget.
+- [set_class()][textual.css.query.DOMQuery.set_class] Sets or removes a class dependant on a boolean.
 - [classes][textual.dom.DOMNode.classes] Is a frozen set of the class(es) set on a widget.
 
 

src/textual/demo/home.py

@@ -66,7 +66,7 @@
 
 ```python
 # Start building!
-from textual import App, ComposeResult
+from textual.app import App, ComposeResult
 from textual.widgets import Label
 
 class MyApp(App):

src/textual/dom.py

@@ -1665,6 +1665,17 @@ def has_class(self, *class_names: str) -> bool:
     def set_class(self, add: bool, *class_names: str, update: bool = True) -> Self:
         """Add or remove class(es) based on a condition.
 
+        This can condense the four lines required to implement the equivalent branch into a single line.
+
+        Example:
+            ```python
+            #if foo:
+            #    self.add_class("-foo")
+            #else:
+            #    self.remove_class("-foo")
+            self.set_class(foo, "-foo")
+            ```
+
         Args:
             add: Add the classes if True, otherwise remove them.
             update: Also update styles.

src/textual/widgets/_input.py

@@ -536,6 +536,10 @@ def _watch_value(self, value: str) -> None:
         if self._initial_value:
             self.cursor_position = len(self.value)
             self._initial_value = False
+        else:
+            # Force a re-validation of the selection to ensure it accounts for
+            # the length of the new value
+            self.selection = self.selection
 
     def _watch_valid_empty(self) -> None:
         """Repeat validation when valid_empty changes."""

src/textual/widgets/_option_list.py

@@ -373,6 +373,7 @@ def add_options(self, new_options: Iterable[OptionListContent]) -> Self:
                 self._id_to_option[option._id] = option
             add_option(option)
         if self.is_mounted:
+            self.refresh(layout=self.styles.auto_dimensions)
             self._update_lines()
         return self
 

tests/input/test_input_properties.py

@@ -93,3 +93,16 @@ async def test_input_selection_deleted_programmatically():
         input_widget.selection = Selection(4, 0)
         input_widget.delete_selection()
         assert input_widget.value == "o, world!"
+
+
+async def test_input_selection_is_valid_after_updating_value():
+    """Regression test for https://github.com/Textualize/textual/issues/5811"""
+    app = InputApp()
+    async with app.run_test() as pilot:
+        input_widget = pilot.app.query_one(Input)
+        # Sanity check (by default focusing the input selects all text)
+        assert input_widget.selection == (0, len(input_widget.value))
+
+        input_widget.value = "foo"
+
+        assert input_widget.selection == (0, len(input_widget.value))