ion/format/
mod.rs

1/*
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
5 */
6
7use std::borrow::Cow;
8use std::fmt::{Display, Formatter};
9use std::{fmt, str};
10
11pub use config::Config;
12
13use crate::format::object::format_object;
14use crate::format::primitive::format_primitive;
15use crate::{Context, Value};
16
17pub mod array;
18pub mod boxed;
19mod config;
20pub mod date;
21pub mod descriptor;
22pub mod function;
23pub mod key;
24pub mod object;
25mod prefix;
26pub mod primitive;
27pub mod promise;
28pub mod regexp;
29mod string;
30pub mod symbol;
31pub mod typedarray;
32
33pub const INDENT: &str = "  ";
34pub const NEWLINE: &str = "\n";
35
36#[must_use]
37pub fn indent_str(indentation: usize) -> Cow<'static, str> {
38	const MAX_INDENTS: usize = 128;
39	static INDENTS: &str = match str::from_utf8(&[b' '; MAX_INDENTS * 2]) {
40		Ok(indents) => indents,
41		_ => unreachable!(),
42	};
43
44	if indentation <= 128 {
45		Cow::Borrowed(&INDENTS[0..indentation * INDENT.len()])
46	} else {
47		Cow::Owned(INDENT.repeat(indentation))
48	}
49}
50
51/// Formats a [JavaScript Value](Value) with the given [configuration](Config).
52pub fn format_value<'cx>(cx: &'cx Context, cfg: Config, value: &'cx Value<'cx>) -> ValueDisplay<'cx> {
53	ValueDisplay { cx, value, cfg }
54}
55
56#[must_use]
57pub struct ValueDisplay<'cx> {
58	cx: &'cx Context,
59	value: &'cx Value<'cx>,
60	cfg: Config,
61}
62
63impl Display for ValueDisplay<'_> {
64	fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
65		if self.value.handle().is_object() {
66			format_object(self.cx, self.cfg, self.value.to_object(self.cx)).fmt(f)
67		} else {
68			format_primitive(self.cx, self.cfg, self.value).fmt(f)
69		}
70	}
71}
ion/format/mod.rs

ion/format/
mod.rs
