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//! The standard library.
//!
//! Call [`new`] to obtain a [`Scope`] containing all standard library
//! definitions.
mod elements;
mod layout;
mod text;
mod utility;
pub use elements::*;
pub use layout::*;
pub use text::*;
pub use utility::*;
use std::convert::TryFrom;
use std::rc::Rc;
use crate::color::{Color, RgbaColor};
use crate::diag::TypResult;
use crate::eval::{Arguments, EvalContext, Scope, Str, Template, Value};
use crate::font::{FontFamily, FontStretch, FontStyle, FontWeight, VerticalFontMetric};
use crate::geom::*;
use crate::layout::LayoutNode;
use crate::syntax::Spanned;
/// Construct a scope containing all standard library definitions.
pub fn new() -> Scope {
let mut std = Scope::new();
// Text.
std.def_func("font", font);
std.def_func("par", par);
std.def_func("lang", lang);
std.def_func("strike", strike);
std.def_func("underline", underline);
std.def_func("overline", overline);
// Layout.
std.def_func("page", page);
std.def_func("pagebreak", pagebreak);
std.def_func("h", h);
std.def_func("v", v);
std.def_func("align", align);
std.def_func("box", boxed);
std.def_func("block", block);
std.def_func("pad", pad);
std.def_func("stack", stack);
std.def_func("grid", grid);
// Elements.
std.def_func("image", image);
std.def_func("rect", rect);
std.def_func("square", square);
std.def_func("ellipse", ellipse);
std.def_func("circle", circle);
// Utility.
std.def_func("type", type_);
std.def_func("repr", repr);
std.def_func("len", len);
std.def_func("rgb", rgb);
std.def_func("min", min);
std.def_func("max", max);
// Colors.
std.def_const("white", RgbaColor::WHITE);
std.def_const("black", RgbaColor::BLACK);
std.def_const("eastern", RgbaColor::new(0x23, 0x9D, 0xAD, 0xFF));
std.def_const("conifer", RgbaColor::new(0x9f, 0xEB, 0x52, 0xFF));
std.def_const("forest", RgbaColor::new(0x43, 0xA1, 0x27, 0xFF));
// Arbitrary constants.
std.def_const("ltr", Dir::LTR);
std.def_const("rtl", Dir::RTL);
std.def_const("ttb", Dir::TTB);
std.def_const("btt", Dir::BTT);
std.def_const("start", Align::Start);
std.def_const("center", Align::Center);
std.def_const("end", Align::End);
std.def_const("left", Align::Left);
std.def_const("right", Align::Right);
std.def_const("top", Align::Top);
std.def_const("bottom", Align::Bottom);
std.def_const("serif", FontFamily::Serif);
std.def_const("sans-serif", FontFamily::SansSerif);
std.def_const("monospace", FontFamily::Monospace);
std.def_const("normal", FontStyle::Normal);
std.def_const("italic", FontStyle::Italic);
std.def_const("oblique", FontStyle::Oblique);
std.def_const("regular", FontWeight::REGULAR);
std.def_const("bold", FontWeight::BOLD);
std.def_const("ascender", VerticalFontMetric::Ascender);
std.def_const("cap-height", VerticalFontMetric::CapHeight);
std.def_const("x-height", VerticalFontMetric::XHeight);
std.def_const("baseline", VerticalFontMetric::Baseline);
std.def_const("descender", VerticalFontMetric::Descender);
std
}
dynamic! {
Dir: "direction",
}
dynamic! {
Align: "alignment",
}
dynamic! {
FontFamily: "font family",
Value::Str(string) => Self::Named(string.to_lowercase()),
}
dynamic! {
FontStyle: "font style",
}
dynamic! {
FontWeight: "font weight",
Value::Int(number) => {
u16::try_from(number).map_or(Self::BLACK, Self::from_number)
},
}
dynamic! {
FontStretch: "font stretch",
Value::Relative(relative) => Self::from_ratio(relative.get() as f32),
}
dynamic! {
VerticalFontMetric: "vertical font metric",
}
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