mirror of
https://github.com/griffi-gh/hUI.git
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63 lines
1.9 KiB
Rust
63 lines
1.9 KiB
Rust
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/// Constructs a `Size` or `Size2d` from a literal or expression
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///
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/// # Syntax:
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/// - `auto` - `Size::Auto`
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/// - `x` - `Size::Static(x)`
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/// - `x%` - `Size::Fraction(x / 100.)` *(literal only)*
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/// - `x/` - `Size::Fraction(x)`
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///
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/// ...where `x` is a literal, identifier or an expression wrapped in parentheses
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///
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/// # Note:
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/// - If a single argument is provided, it creates a `Size` using the rules specified above\
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/// - If two arguments are provided, it creates a `Size2d` with the first value as width and the second as height\
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/// Example: `size!(100, 50%)` creates a `Size2d` with width `100` (`Size::Static(100.)`) and height `50%` (`Size::Fraction(0.5)`)
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/// - `%` syntax is only valid for literals (`50%`), not expressions or identidiers.\
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/// Use `/` instead (`(0.5 * x)/`, `x/`), but be aware of the different range (0.0-1.0) \
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/// - Expressions must be wrapped in parentheses (for example: `(x + 5)`).\
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/// This does not apply to single identifiers (`x`) or literals (`5`)
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#[macro_export]
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macro_rules! size {
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(auto) => {
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$crate::layout::Size::Auto
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};
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($x:literal) => {
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$crate::layout::Size::Static($x as f32)
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};
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($x:literal %) => {
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$crate::layout::Size::Fraction($x as f32 / 100.)
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};
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($x:literal /) => {
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$crate::layout::Size::Fraction($x as f32)
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};
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($x:ident) => {
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$crate::layout::Size::Static($x as f32)
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};
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($x:ident /) => {
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$crate::layout::Size::Fraction($x as f32)
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};
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(($x:expr)) => {
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$crate::layout::Size::Static(($x) as f32)
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};
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(($x:expr) /) => {
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$crate::layout::Size::Fraction(($x) as f32)
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};
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($x:tt , $y:tt $($ys:tt)?) => {
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$crate::layout::Size2d {
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width: $crate::size!($x),
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height: $crate::size!($y $($ys)?),
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}
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};
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($x:tt $($xs:tt)? , $y:tt $($ys:tt)?) => {
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$crate::layout::Size2d {
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width: $crate::size!($x $($xs)?),
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height: $crate::size!($y $($ys)?),
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}
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};
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}
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