ion/format/
promise.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::fmt;
8use std::fmt::{Display, Formatter, Write as _};
9
10use colored::Colorize as _;
11use mozjs::jsapi::PromiseState;
12
13use crate::format::{Config, format_value, indent_str};
14use crate::{Context, Promise};
15
16/// Formats a [Promise] with the given [configuration](Config).
17/// ### Format
18/// ```js
19/// Promise { <#state> <#result> }
20/// ```
21pub fn format_promise<'cx>(cx: &'cx Context, cfg: Config, promise: &'cx Promise) -> PromiseDisplay<'cx> {
22	PromiseDisplay { cx, promise, cfg }
23}
24
25#[must_use]
26pub struct PromiseDisplay<'cx> {
27	cx: &'cx Context,
28	promise: &'cx Promise<'cx>,
29	cfg: Config,
30}
31
32impl Display for PromiseDisplay<'_> {
33	fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
34		let colour = self.cfg.colours.promise;
35		let state = self.promise.state();
36
37		let state = match state {
38			PromiseState::Pending => return "Promise { <pending> }".color(colour).fmt(f),
39			PromiseState::Fulfilled => "<fulfilled>".color(colour),
40			PromiseState::Rejected => "<rejected>".color(colour),
41		};
42
43		"Promise {".color(colour).fmt(f)?;
44		let result = self.promise.result(self.cx);
45
46		if self.cfg.multiline {
47			let result = format_value(self.cx, self.cfg.depth(self.cfg.depth + 1), &result);
48
49			f.write_char('\n')?;
50			indent_str((self.cfg.indentation + self.cfg.depth + 1) as usize).fmt(f)?;
51			state.fmt(f)?;
52			f.write_char(' ')?;
53			result.fmt(f)?;
54			"\n}".color(colour).fmt(f)
55		} else {
56			let result = format_value(self.cx, self.cfg, &result);
57
58			f.write_char(' ')?;
59			state.fmt(f)?;
60			f.write_char(' ')?;
61			result.fmt(f)?;
62			" }".color(colour).fmt(f)
63		}
64	}
65}
ion/format/promise.rs

ion/format/
promise.rs
