feat(text): add raw! and styled! macros (#4)

These macros are similar to the format! macro, but return a raw or
styled Span instead of a String.

```rust
use ratatui_macros::{raw, styled};

let name = "world";
raw!("Hello, {name}!");
styled!(Style::new().green(), "Hello, {name}!");
styled!(Color::Green, "Hello, {name}!");
styled!(Modifier::BOLD, "Hello, {name}!");
```
This commit is contained in:
Josh McKinney 2024-01-13 00:45:38 -08:00 committed by GitHub
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@ -13,7 +13,8 @@ categories = ["tui", "macro"]
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
ratatui = "0.25.0"
# requires alpha version of ratatui for the Into<Style> changes
ratatui = "0.26.0-alpha.1"
[dev-dependencies]
trybuild = { version = "1.0.88", features = ["diff"] }

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@ -16,6 +16,7 @@ This is an experimental playground for us to explore macros that would be useful
- Constraint-based Layouts: Easily define layout constraints such as fixed, percentage, minimum, and
maximum sizes, as well as ratios.
- Directional Layouts: Specify layouts as either horizontal or vertical with simple macro commands.
- Raw and Styled span format macros.
## Getting Started
@ -33,6 +34,8 @@ use ratatui_macros::{
constraints,
horizontal,
vertical,
raw,
styled,
};
```
@ -113,6 +116,23 @@ assert_eq!(left.width, 3);
assert_eq!(right.width, 3);
```
## Spans
The `raw!` and `styled!` macros create raw and styled `Span`s respectively. They each take a format
string and arguments. `styled!` accepts as the first paramter any value that can be converted to a
`Style`.
```rust
use ratatui::prelude::*;
use ratatui_macros::{styled, raw};
let name = "world!";
let raw_greeting = raw!("hello {name}");
let styled_greeting = styled!(Style::new().green(), "hello {name}");
let styled_greeting = styled!(Color::Green, "hello {name}");
let styled_greeting = styled!(Modifier::BOLD, "hello {name}");
```
## Contributing
Contributions to `ratatui-macros` are welcome! Whether it's submitting a bug report, a feature

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mod color;
mod layout;
mod span;

180
src/span.rs Normal file
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/// A macro for creating a raw (unstyled) [`Span`] using formatting syntax.
///
/// `raw!` is similar to the [`format!`] macro, but it returns a [`Span`] instead of a `String`.
///
/// # Examples
///
/// ```rust
/// # use ratatui::prelude::*;
/// use ratatui_macros::raw;
///
/// let content = "content";
///
/// let span = raw!("test content");
/// let span = raw!("test {}", "content");
/// let span = raw!("{} {}", "test", "content");
/// let span = raw!("test {content}");
/// let span = raw!("test {content}", content = "content");
///
/// // with format specifiers
/// let span = raw!("test {:4}", 123);
/// let span = raw!("test {:04}", 123);
/// ```
///
/// [`Span`]: crate::text::Span
#[macro_export]
macro_rules! raw {
($($arg:tt)*) => {
ratatui::text::Span::raw(format!($($arg)*))
};
}
/// A macro for creating a styled [`Span`] using formatting syntax.
///
/// `styled!` is similar to the [`format!`] macro, but it returns a [`Span`] instead of a `String`.
///
/// The first argument is a [`Style`] or any type that is convertible to [`Style`] (e.g. [`Color`]).
///
/// # Examples
///
/// ```rust
/// # use ratatui::prelude::*;
/// use ratatui_macros::styled;
///
/// let content = "content";
///
/// // styled
/// let style = Style::new().green();
/// let span = styled!(style, "test content");
/// let span = styled!(style, "test {}", "content");
/// let span = styled!(style, "{} {}", "test", "content");
/// let span = styled!(style, "test {content}");
/// let span = styled!(style, "test {content}", content = "content");
///
/// // accepts any type that is convertible to Style
/// let span = styled!(Style::new().green(), "test {content}");
/// let span = styled!(Color::Green, "test {content}");
/// let span = styled!(Modifier::BOLD, "test {content}");
///
/// // with format specifiers
/// let span = styled!(style, "test {:4}", 123);
/// let span = styled!(style, "test {:04}", 123);
/// ```
///
/// [`Color`]: crate::style::Color
/// [`Style`]: crate::style::Style
/// [`Span`]: crate::text::Span
#[macro_export]
macro_rules! styled {
($style:expr, $($arg:tt)*) => {
ratatui::text::Span::styled(format!($($arg)*), $style)
};
}
#[cfg(test)]
mod tests {
use ratatui::prelude::*;
#[test]
fn raw() {
let test = "test";
let content = "content";
let number = 123;
// literal
let span = raw!("test content");
assert_eq!(span, Span::raw("test content"));
// string
let span = raw!("test {}", "content");
assert_eq!(span, Span::raw("test content"));
// string variable
let span = raw!("test {}", content);
assert_eq!(span, Span::raw("test content"));
// string variable in the format string
let span = raw!("test {content}");
assert_eq!(span, Span::raw("test content"));
// named variable
let span = raw!("test {content}", content = "content");
assert_eq!(span, Span::raw("test content"));
// named variable pointing at a local variable
let span = raw!("test {content}", content = content);
assert_eq!(span, Span::raw("test content"));
// two strings
let span = raw!("{} {}", "test", "content");
assert_eq!(span, Span::raw("test content"));
// two string variables
let span = raw!("{test} {content}");
assert_eq!(span, Span::raw("test content"));
// a number
let span = raw!("test {number}");
assert_eq!(span, Span::raw("test 123"));
// a number with a format specifier
let span = raw!("test {number:04}");
assert_eq!(span, Span::raw("test 0123"));
}
#[test]
fn styled() {
const STYLE: Style = Style::new().fg(Color::Green);
let test = "test";
let content = "content";
let number = 123;
// literal
let span = styled!(STYLE, "test content");
assert_eq!(span, Span::styled("test content", STYLE));
// string
let span = styled!(STYLE, "test {}", "content");
assert_eq!(span, Span::styled("test content", STYLE));
// string variable
let span = styled!(STYLE, "test {}", content);
assert_eq!(span, Span::styled("test content", STYLE));
// string variable in the format string
let span = styled!(STYLE, "test {content}");
assert_eq!(span, Span::styled("test content", STYLE));
// named variable
let span = styled!(STYLE, "test {content}", content = "content");
assert_eq!(span, Span::styled("test content", STYLE));
// named variable pointing at a local variable
let span = styled!(STYLE, "test {content}", content = content);
assert_eq!(span, Span::styled("test content", STYLE));
// two strings
let span = styled!(STYLE, "{} {}", "test", "content");
assert_eq!(span, Span::styled("test content", STYLE));
// two string variables
let span = styled!(STYLE, "{test} {content}");
assert_eq!(span, Span::styled("test content", STYLE));
// a number
let span = styled!(STYLE, "test {number}");
assert_eq!(span, Span::styled("test 123", STYLE));
// a number with a format specifier
let span = styled!(STYLE, "test {number:04}");
assert_eq!(span, Span::styled("test 0123", STYLE));
// accepts any type that is convertible to Style
let span = styled!(Color::Green, "test {content}");
assert_eq!(span, Span::styled("test content", STYLE));
let span = styled!(Modifier::BOLD, "test {content}");
assert_eq!(span, Span::styled("test content", Style::new().bold()));
}
}