Density tracking issue: #18078
This PR refactors our spacing system to use a more flexible and
maintainable approach. We've replaced the static `Spacing` enum with a
dynamically generated `DynamicSpacing` enum using a proc macro.
Enum variants now use a `BaseXX` format, where XX = the pixel value @
default rem size and the default UI density.
For example:
`CustomSpacing::Base16` would return 16px at the default UI scale &
density.
I'd love to find another name other than `Base` that is clear (to avoid
base_10, etc confusion), let me know if you have any ideas!
Changes:
- Introduced a new `derive_dynamic_spacing` proc macro to generate the
`DynamicSpacing` enum
- Updated all usages of `Spacing` to use the new `DynamicSpacing`
- Removed the `custom_spacing` function, mapping previous usages to
appropriate `DynamicSpacing` variants
- Improved documentation and type safety for spacing values
New usage example:
```rust
.child(
div()
.flex()
.flex_none()
.m(DynamicSpacing::Base04.px(cx))
.size(DynamicSpacing::Base16.rems(cx))
.children(icon),
)
```
vs old usage example:
```
.child(
div()
.flex()
.flex_none()
.m(Spacing::Small.px(cx))
.size(custom_spacing(px(16.)))
.children(icon),
)
```
Release Notes:
- N/A
Similar to https://github.com/zed-industries/zed/pull/18690 &
https://github.com/zed-industries/zed/pull/18695, this PR enables
required docs for `ui` and does some cleanup.
Changes:
- Enables the `deny(missing_docs)` crate-wide.
- Adds `allow(missing_docs)` on many modules until folks pick them up to
document them
- Documents some modules (all in `ui/src/styles`)
- Crate root-level organization: Traits move to `traits`, other misc
organization
- Cleaned out a bunch of unused code.
Note: I'd like to remove `utils/format_distance` but the assistant panel
uses it. To move it over to use the `time_format` crate we may need to
update it to use `time` instead of `chrono`. Needs more investigation.
Release Notes:
- N/A
