This PR reworks the way we define our third-party themes to make them
work as overlays on top of a base theme.
We introduce the concept of a `UserThemeFamily` that contains
`UserTheme`s. Rather than being an entire theme definition on their own,
a `UserTheme` just contains optional overrides for the values in a
`Theme`.
When resolving a `UserTheme`, we apply it on top of the base theme. Any
values not overridden in the `UserTheme` will fall back to the `Theme`
defaults.
Right now we are just using `UserTheme` to model third-party themes that
we distribute with the Zed binary. However, this same structure can also
be used to import arbitrary user themes (such as from a theme registry,
or even a theme blob from the settings file).
Release Notes:
- N/A
This PR renames the `ThemeVariant` type to `Theme`.
This better reflects its purpose, as well as matches the same name as we
had before, which should make porting crates slightly easier.
Release Notes:
- N/A
This PR applies a number of field renames in the `ThemeColors` struct
from the `import-theme` branch.
This will help prevent this branch from diverging too far from `main`.
Release Notes:
- N/A
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Co-authored-by: Nate Butler <iamnbutler@gmail.com>
Co-authored-by: Marshall Bowers <1486634+maxdeviant@users.noreply.github.com>
This PR removes the `Default` impl for `ThemeColors`.
Since we need default light and dark variants for `ThemeColors`, we
can't use a single `Default` impl.
Release Notes:
- N/A
This PR adjusts the representations of `ColorScale`s to allow us to
remove an unsafe `From` impl when converting from the statically-defined
representation of the scale.
Release Notes:
- N/A
This PR adds a new `ui_font_size` setting that can be used to control
the scale of the entire UI.
We use the value in this setting to set the base rem size of the window.
Release Notes:
- N/A
