1de4b65d2a
1. Wherever the `buf` field of a `Formatter` was used, the `Formatter` is used instead. 2. The usage of `write_fmt` is minimized as much as possible, the `write!` macro is preferred wherever possible. 3. Usage of `fmt::write` is minimized, favoring the `write!` macro instead.
54 lines
1.9 KiB
Rust
54 lines
1.9 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
//! HTML Escaping
|
|
//!
|
|
//! This module contains one unit-struct which can be used to HTML-escape a
|
|
//! string of text (for use in a format string).
|
|
|
|
use std::fmt;
|
|
|
|
/// Wrapper struct which will emit the HTML-escaped version of the contained
|
|
/// string when passed to a format string.
|
|
pub struct Escape<'a>(pub &'a str);
|
|
|
|
impl<'a> fmt::Show for Escape<'a> {
|
|
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
|
|
// Because the internet is always right, turns out there's not that many
|
|
// characters to escape: http://stackoverflow.com/questions/7381974
|
|
let Escape(s) = *self;
|
|
let pile_o_bits = s.as_slice();
|
|
let mut last = 0;
|
|
for (i, ch) in s.bytes().enumerate() {
|
|
match ch as char {
|
|
'<' | '>' | '&' | '\'' | '"' => {
|
|
try!(fmt.write(pile_o_bits.slice(last, i).as_bytes()));
|
|
let s = match ch as char {
|
|
'>' => ">",
|
|
'<' => "<",
|
|
'&' => "&",
|
|
'\'' => "'",
|
|
'"' => """,
|
|
_ => unreachable!()
|
|
};
|
|
try!(fmt.write(s.as_bytes()));
|
|
last = i + 1;
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
if last < s.len() {
|
|
try!(fmt.write(pile_o_bits.slice_from(last).as_bytes()));
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|