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|
use std::io;
use super::*;
use crate::diag::Error;
use crate::layout::{ImageNode, ShapeKind, ShapeNode};
/// `image`: An image.
pub fn image(ctx: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
let path = args.expect::<Spanned<Str>>("path to image file")?;
let width = args.named("width")?;
let height = args.named("height")?;
let full = ctx.make_path(&path.v);
let id = ctx.images.load(&full).map_err(|err| {
Error::boxed(path.span, match err.kind() {
io::ErrorKind::NotFound => "file not found".into(),
_ => format!("failed to load image ({})", err),
})
})?;
Ok(Value::Template(Template::from_inline(move |_| ImageNode {
id,
width,
height,
})))
}
/// `rect`: A rectangle with optional content.
pub fn rect(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
let width = args.named("width")?;
let height = args.named("height")?;
let fill = args.named("fill")?;
let body = args.find();
Ok(shape_impl(ShapeKind::Rect, width, height, fill, body))
}
/// `square`: A square with optional content.
pub fn square(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
let size = args.named::<Length>("size")?.map(Linear::from);
let width = match size {
None => args.named("width")?,
size => size,
};
let height = match size {
None => args.named("height")?,
size => size,
};
let fill = args.named("fill")?;
let body = args.find();
Ok(shape_impl(ShapeKind::Square, width, height, fill, body))
}
/// `ellipse`: An ellipse with optional content.
pub fn ellipse(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
let width = args.named("width")?;
let height = args.named("height")?;
let fill = args.named("fill")?;
let body = args.find();
Ok(shape_impl(ShapeKind::Ellipse, width, height, fill, body))
}
/// `circle`: A circle with optional content.
pub fn circle(_: &mut EvalContext, args: &mut Args) -> TypResult<Value> {
let diameter = args.named("radius")?.map(|r: Length| 2.0 * Linear::from(r));
let width = match diameter {
None => args.named("width")?,
diameter => diameter,
};
let height = match diameter {
None => args.named("height")?,
diameter => diameter,
};
let fill = args.named("fill")?;
let body = args.find();
Ok(shape_impl(ShapeKind::Circle, width, height, fill, body))
}
fn shape_impl(
shape: ShapeKind,
mut width: Option<Linear>,
mut height: Option<Linear>,
fill: Option<Color>,
body: Option<Template>,
) -> Value {
// Set default shape size if there's no body.
if body.is_none() {
let v = Length::pt(30.0).into();
height.get_or_insert(v);
width.get_or_insert(match shape {
ShapeKind::Square | ShapeKind::Circle => v,
ShapeKind::Rect | ShapeKind::Ellipse => 1.5 * v,
});
}
Value::Template(Template::from_inline(move |style| ShapeNode {
shape,
width,
height,
fill: Some(Paint::Color(
fill.unwrap_or(Color::Rgba(RgbaColor::new(175, 175, 175, 255))),
)),
child: body.as_ref().map(|template| template.to_stack(style).pack()),
}))
}
|
