use gpui::{rems, Length, Rems, WindowContext}; /// The base size of a rem, in pixels.pub const BASE_REM_SIZE_IN_PX: f32 = 16.; /// Returns a rem value derived from the provided pixel value and the base rem size (16px).////// This can be used to compute rem values relative to pixel sizes, without/// needing to hard-code the rem value.////// For instance, instead of writing `rems(0.875)` you can write `rems_from_px(14.)`#[inline(always)]pub fn rems_from_px(px: f32) -> Rems {    rems(px / BASE_REM_SIZE_IN_PX)} /// Returns a [`Length`] corresponding to the specified percentage of the viewport's width.////// `percent` should be a value between `0.0` and `1.0`.pub fn vw(percent: f32, cx: &mut WindowContext) -> Length {    Length::from(cx.viewport_size().width * percent)} /// Returns a [`Length`] corresponding to the specified percentage of the viewport's height.////// `percent` should be a value between `0.0` and `1.0`.pub fn vh(percent: f32, cx: &mut WindowContext) -> Length {    Length::from(cx.viewport_size().height * percent)}