Function html_escape::encode_unquoted_attribute_to_vec

source · 
pub fn encode_unquoted_attribute_to_vec<S: AsRef<str>>(
    text: S,
    output: &mut Vec<u8>
) -> &[u8] ⓘ
Expand description

Write text used in an unquoted attribute to a mutable Vec<u8> reference and return the encoded data slice. Except for alphanumeric characters, escape all characters which are less than 128.

The following characters are escaped to named entities:

  • & => &amp;
  • < => &lt;
  • > => &gt;
  • " => &quot;

Other non-alphanumeric characters are escaped to &#xHH;.

Examples found in repository?
src/encode/html_entity/unquoted_attribute.rs (lines 51-54)
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pub fn encode_unquoted_attribute<S: ?Sized + AsRef<str>>(text: &S) -> Cow<str> {
    let text = text.as_ref();
    let text_bytes = text.as_bytes();

    let text_length = text_bytes.len();

    let mut p = 0;
    let mut e;

    loop {
        if p == text_length {
            return Cow::from(text);
        }

        e = text_bytes[p];

        if utf8_width::is_width_1(e) && !e.is_ascii_alphanumeric() {
            break;
        }

        p += 1;
    }

    let mut v = Vec::with_capacity(text_length);

    v.extend_from_slice(&text_bytes[..p]);

    write_html_entity_to_vec(e, &mut v);

    encode_unquoted_attribute_to_vec(
        unsafe { from_utf8_unchecked(&text_bytes[(p + 1)..]) },
        &mut v,
    );

    Cow::from(unsafe { String::from_utf8_unchecked(v) })
}

/// Write text used in an unquoted attribute to a mutable `String` reference and return the encoded string slice. Except for alphanumeric characters, escape all characters which are less than 128.
///
/// The following characters are escaped to named entities:
///
/// * `&` => `&amp;`
/// * `<` => `&lt;`
/// * `>` => `&gt;`
/// * `"` => `&quot;`
///
/// Other non-alphanumeric characters are escaped to `&#xHH;`.
#[inline]
pub fn encode_unquoted_attribute_to_string<S: AsRef<str>>(text: S, output: &mut String) -> &str {
    unsafe { from_utf8_unchecked(encode_unquoted_attribute_to_vec(text, output.as_mut_vec())) }
}