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//! Computational utility functions.
mod math;
mod numbering;
pub use math::*;
pub use numbering::*;
use std::str::FromStr;
use crate::library::prelude::*;
use crate::library::text::{Case, TextNode};
/// Ensure that a condition is fulfilled.
pub fn assert(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect::<Spanned<bool>>("condition")?;
if !v {
bail!(span, "assertion failed");
}
Ok(Value::None)
}
/// The name of a value's type.
pub fn type_(_: &mut Context, args: &mut Args) -> TypResult<Value> {
Ok(args.expect::<Value>("value")?.type_name().into())
}
/// The string representation of a value.
pub fn repr(_: &mut Context, args: &mut Args) -> TypResult<Value> {
Ok(args.expect::<Value>("value")?.repr().into())
}
/// Join a sequence of values, optionally interspersing it with another value.
pub fn join(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let span = args.span;
let sep = args.named::<Value>("sep")?.unwrap_or(Value::None);
let mut result = Value::None;
let mut iter = args.all::<Value>()?.into_iter();
if let Some(first) = iter.next() {
result = first;
}
for value in iter {
result = result.join(sep.clone()).at(span)?;
result = result.join(value).at(span)?;
}
Ok(result)
}
/// Convert a value to a integer.
pub fn int(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("value")?;
Ok(Value::Int(match v {
Value::Bool(v) => v as i64,
Value::Int(v) => v,
Value::Float(v) => v as i64,
Value::Str(v) => match v.parse() {
Ok(v) => v,
Err(_) => bail!(span, "invalid integer"),
},
v => bail!(span, "cannot convert {} to integer", v.type_name()),
}))
}
/// Convert a value to a float.
pub fn float(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("value")?;
Ok(Value::Float(match v {
Value::Int(v) => v as f64,
Value::Float(v) => v,
Value::Str(v) => match v.parse() {
Ok(v) => v,
Err(_) => bail!(span, "invalid float"),
},
v => bail!(span, "cannot convert {} to float", v.type_name()),
}))
}
/// Cconvert a value to a string.
pub fn str(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("value")?;
Ok(Value::Str(match v {
Value::Int(v) => format_eco!("{}", v),
Value::Float(v) => format_eco!("{}", v),
Value::Str(v) => v,
v => bail!(span, "cannot convert {} to string", v.type_name()),
}))
}
/// Create an RGB(A) color.
pub fn rgb(_: &mut Context, args: &mut Args) -> TypResult<Value> {
Ok(Value::from(
if let Some(string) = args.find::<Spanned<EcoString>>()? {
match RgbaColor::from_str(&string.v) {
Ok(color) => color,
Err(_) => bail!(string.span, "invalid hex string"),
}
} else {
struct Component(u8);
castable! {
Component,
Expected: "integer or relative",
Value::Int(v) => match v {
0 ..= 255 => Self(v as u8),
_ => Err("must be between 0 and 255")?,
},
Value::Relative(v) => if (0.0 ..= 1.0).contains(&v.get()) {
Self((v.get() * 255.0).round() as u8)
} else {
Err("must be between 0% and 100%")?
},
}
let Component(r) = args.expect("red component")?;
let Component(g) = args.expect("green component")?;
let Component(b) = args.expect("blue component")?;
let Component(a) = args.eat()?.unwrap_or(Component(255));
RgbaColor::new(r, g, b, a)
},
))
}
/// Create a CMYK color.
pub fn cmyk(_: &mut Context, args: &mut Args) -> TypResult<Value> {
struct Component(u8);
castable! {
Component,
Expected: "relative",
Value::Relative(v) => if (0.0 ..= 1.0).contains(&v.get()) {
Self((v.get() * 255.0).round() as u8)
} else {
Err("must be between 0% and 100%")?
},
}
let Component(c) = args.expect("cyan component")?;
let Component(m) = args.expect("magenta component")?;
let Component(y) = args.expect("yellow component")?;
let Component(k) = args.expect("key component")?;
Ok(Value::Color(CmykColor::new(c, m, y, k).into()))
}
/// The length of a string, an array or a dictionary.
pub fn len(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("collection")?;
Ok(Value::Int(match v {
Value::Str(v) => v.len() as i64,
Value::Array(v) => v.len(),
Value::Dict(v) => v.len(),
v => bail!(
span,
"expected string, array or dictionary, found {}",
v.type_name(),
),
}))
}
/// Convert a string to lowercase.
pub fn lower(_: &mut Context, args: &mut Args) -> TypResult<Value> {
case(Case::Lower, args)
}
/// Convert a string to uppercase.
pub fn upper(_: &mut Context, args: &mut Args) -> TypResult<Value> {
case(Case::Upper, args)
}
/// Change the case of a string or content.
fn case(case: Case, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("string or content")?;
Ok(match v {
Value::Str(v) => Value::Str(case.apply(&v).into()),
Value::Content(v) => Value::Content(v.styled(TextNode::CASE, Some(case))),
v => bail!(span, "expected string or content, found {}", v.type_name()),
})
}
/// The sorted version of an array.
pub fn sorted(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect::<Spanned<Array>>("array")?;
Ok(Value::Array(v.sorted().at(span)?))
}
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