mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-20 16:55:40 +00:00
0f1c59e62d
Source-Repo: https://github.com/servo/servo Source-Revision: bb916bb38bc4298477bfc8134b94dc906054bce1 --HG-- rename : servo/components/util/str.rs => servo/components/style/str.rs rename : servo/components/util/tid.rs => servo/components/style/tid.rs rename : servo/tests/unit/util/str.rs => servo/tests/unit/style/str.rs
128 lines
3.5 KiB
Rust
128 lines
3.5 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
use num_traits::ToPrimitive;
|
|
use std::convert::AsRef;
|
|
use std::iter::{Filter, Peekable};
|
|
use std::str::Split;
|
|
|
|
pub type StaticCharVec = &'static [char];
|
|
pub type StaticStringVec = &'static [&'static str];
|
|
|
|
/// A "space character" according to:
|
|
///
|
|
/// https://html.spec.whatwg.org/multipage/#space-character
|
|
pub static HTML_SPACE_CHARACTERS: StaticCharVec = &[
|
|
'\u{0020}',
|
|
'\u{0009}',
|
|
'\u{000a}',
|
|
'\u{000c}',
|
|
'\u{000d}',
|
|
];
|
|
|
|
#[inline]
|
|
pub fn char_is_whitespace(c: char) -> bool {
|
|
HTML_SPACE_CHARACTERS.contains(&c)
|
|
}
|
|
|
|
pub fn is_whitespace(s: &str) -> bool {
|
|
s.chars().all(char_is_whitespace)
|
|
}
|
|
|
|
pub fn split_html_space_chars<'a>(s: &'a str) ->
|
|
Filter<Split<'a, StaticCharVec>, fn(&&str) -> bool> {
|
|
fn not_empty(&split: &&str) -> bool { !split.is_empty() }
|
|
s.split(HTML_SPACE_CHARACTERS).filter(not_empty as fn(&&str) -> bool)
|
|
}
|
|
|
|
pub fn split_commas<'a>(s: &'a str) -> Filter<Split<'a, char>, fn(&&str) -> bool> {
|
|
fn not_empty(&split: &&str) -> bool { !split.is_empty() }
|
|
s.split(',').filter(not_empty as fn(&&str) -> bool)
|
|
}
|
|
|
|
fn is_ascii_digit(c: &char) -> bool {
|
|
match *c {
|
|
'0'...'9' => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
fn is_decimal_point(c: char) -> bool {
|
|
c == '.'
|
|
}
|
|
|
|
fn is_exponent_char(c: char) -> bool {
|
|
match c {
|
|
'e' | 'E' => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
|
|
pub fn read_numbers<I: Iterator<Item=char>>(mut iter: Peekable<I>) -> (Option<i64>, usize) {
|
|
match iter.peek() {
|
|
Some(c) if is_ascii_digit(c) => (),
|
|
_ => return (None, 0),
|
|
}
|
|
|
|
iter.take_while(is_ascii_digit).map(|d| {
|
|
d as i64 - '0' as i64
|
|
}).fold((Some(0i64), 0), |accumulator, d| {
|
|
let digits = accumulator.0.and_then(|accumulator| {
|
|
accumulator.checked_mul(10)
|
|
}).and_then(|accumulator| {
|
|
accumulator.checked_add(d)
|
|
});
|
|
(digits, accumulator.1 + 1)
|
|
})
|
|
}
|
|
|
|
pub fn read_fraction<I: Iterator<Item=char>>(mut iter: Peekable<I>,
|
|
mut divisor: f64,
|
|
value: f64) -> (f64, usize) {
|
|
match iter.peek() {
|
|
Some(c) if is_decimal_point(*c) => (),
|
|
_ => return (value, 0),
|
|
}
|
|
iter.next();
|
|
|
|
iter.take_while(is_ascii_digit).map(|d|
|
|
d as i64 - '0' as i64
|
|
).fold((value, 1), |accumulator, d| {
|
|
divisor *= 10f64;
|
|
(accumulator.0 + d as f64 / divisor,
|
|
accumulator.1 + 1)
|
|
})
|
|
}
|
|
|
|
pub fn read_exponent<I: Iterator<Item=char>>(mut iter: Peekable<I>) -> Option<i32> {
|
|
match iter.peek() {
|
|
Some(c) if is_exponent_char(*c) => (),
|
|
_ => return None,
|
|
}
|
|
iter.next();
|
|
|
|
match iter.peek() {
|
|
None => None,
|
|
Some(&'-') => {
|
|
iter.next();
|
|
read_numbers(iter).0.map(|exp| -exp.to_i32().unwrap_or(0))
|
|
}
|
|
Some(&'+') => {
|
|
iter.next();
|
|
read_numbers(iter).0.map(|exp| exp.to_i32().unwrap_or(0))
|
|
}
|
|
Some(_) => read_numbers(iter).0.map(|exp| exp.to_i32().unwrap_or(0))
|
|
}
|
|
}
|
|
|
|
pub fn str_join<I, T>(strs: I, join: &str) -> String
|
|
where I: IntoIterator<Item=T>, T: AsRef<str>,
|
|
{
|
|
strs.into_iter().enumerate().fold(String::new(), |mut acc, (i, s)| {
|
|
if i > 0 { acc.push_str(join); }
|
|
acc.push_str(s.as_ref());
|
|
acc
|
|
})
|
|
}
|