## Motivating problem
The gpui API currently has this counter intuitive behaviour
```rust
div()
.id("hallo")
.cursor_pointer()
.text_color(white())
.font_weight(FontWeight::SEMIBOLD)
.text_size(px(20.0))
.child("hallo")
.active(|this| this.text_color(red()))
```
By changing the text_color when the div is active, the current behaviour
is to overwrite all of the text styling rather than do a proper
refinement of the existing text styling leading to this odd result:
The button being active inadvertently changes the font size.
https://github.com/user-attachments/assets/1ff51169-0d76-4ee5-bbb0-004eb9ffdf2c
## Solution
Previously refining a Style would not recursively refine the TextStyle
inside of it, leading to this behaviour:
```rust
let mut style = Style::default();
style.refine(&StyleRefinement::default().text_size(px(20.0)));
style.refine(&StyleRefinement::default().font_weight(FontWeight::SEMIBOLD));
assert!(style.text_style().unwrap().font_size.is_none());
//assertion passes
```
(As best as I can tell) Style deliberately has `pub text:
TextStyleRefinement` storing the `TextStyleRefinement` rather than the
absolute `TextStyle` so that these refinements can be elsewhere used in
cascading text styles down to element's children. But a consequence of
that is that the refine macro was not properly recursively refining the
`text` field as it ought to.
I've modified the refine macro so that the `#[refineable]` attribute
works with `TextStyleRefinement` as well as the usual `TextStyle`.
(Perhaps a little bit haphazardly by simply checking whether the name
ends in Refinement - there may be a better solution there).
This PR resolves the motivating problem and triggers the assertion in
the above code as you'd expect. I've compiled zed under these changes
and all seems to be in order there.
Release Notes:
- N/A
---------
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Follows on from
https://github.com/zed-industries/zed/pull/37716#pullrequestreview-3195695110
by @SomeoneToIgnore
After this the doctests will be run in CI to check that the examples are
still accurate.
Note that doctests aren't run by Nextest: you can run them locally with
`cargo test --doc`.
Summary:
* Run tests from CI
* Loosen an exact float comparison to match approximately (otherwise it
fails)
* Fixed one actual bug in the tests for `dilate` where the test code
assumed that `dilate` mutates `self` rather than returning a new object
* Add some `must_use` on some functions that seemed at risk of similar
bugs, following the Rust stdlib style to add it where ignoring the
result is almost certainly a bug.
* Fix some cases where the doc examples seem to have gone out of date
with the code
* Add imports to doctests that need them
* Add some dev-dependencies to make the tests build
* Fix the `key_dispatch` module docstring, which was accidentally
attached to objects within that module
* Skip some doctest examples that seem like they need an async
environment or that just looked hard to get running
AI usage: I asked Claude to do some of the repetitive tests. I checked
the output and fixed up some things that seemed to not be in the right
spirit of the test, or too longwinded.
I think we could reasonably run the tests on only Linux to save CI
CPU-seconds and latency, but I haven't done that yet, partly because of
how it's implemented in the action.
Release Notes:
- N/A
Editing JSON styles is not very helpful for bringing style changes back
to the actual code. This PR adds a buffer that pretends to be Rust,
applying any style attribute identifiers it finds. Also supports
completions with display of documentation. The effect of the currently
selected completion is previewed. Warning diagnostics appear on any
unrecognized identifier.
https://github.com/user-attachments/assets/af39ff0a-26a5-4835-a052-d8f642b2080c
Adds a `#[derive_inspector_reflection]` macro which allows these methods
to be enumerated and called by their name. The macro code changes were
95% generated by Zed Agent + Opus 4.
Release Notes:
* Added an element inspector for development. On debug builds,
`dev::ToggleInspector` will open a pane allowing inspecting of element
info and modifying styles.
Open inspector with `dev: toggle inspector` from command palette or
`cmd-alt-i` on mac or `ctrl-alt-i` on linux.
https://github.com/user-attachments/assets/54c43034-d40b-414e-ba9b-190bed2e6d2f
* Picking of elements via the mouse, with scroll wheel to inspect
occluded elements.
* Temporary manipulation of the selected element.
* Layout info and JSON-based style manipulation for `Div`.
* Navigation to code that constructed the element.
Big thanks to @as-cii and @maxdeviant for sorting out how to implement
the core of an inspector.
Release Notes:
- N/A
---------
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Co-authored-by: Federico Dionisi <code@fdionisi.me>
