49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
use crate::proc::Processor;
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use crate::err::HbRes;
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use crate::spec::codepoint::is_control;
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use crate::code::Code;
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use crate::proc::attr::quoted::{is_attr_quote, process_quoted_val};
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use crate::proc::attr::unquoted::process_attr_unquoted_val;
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mod quoted;
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mod unquoted;
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pub enum AttrType {
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// Special value for hb_unit_tag.
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None,
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Quoted,
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Unquoted,
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NoValue,
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}
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// Characters allowed in an attribute name.
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// NOTE: Unicode noncharacters not tested.
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// See https://html.spec.whatwg.org/multipage/syntax.html#syntax-attribute-name for spec.
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fn is_name_char(c: u8) -> bool {
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match c {
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b' ' | b'"' | b'\'' | b'>' | b'/' | b'=' => false,
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c => !is_control(c),
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}
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}
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pub fn process_attr<D: Code>(proc: &Processor<D>) -> HbRes<AttrType> {
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let name = proc.match_while_pred(is_name_char).require_with_reason("attribute name")?.keep().slice();
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let should_collapse_and_trim_value_ws = name.eq_ignore_ascii_case(b"class");
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let has_value = proc.match_char(b'=').keep().matched();
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if !has_value {
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Ok(AttrType::NoValue)
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} else {
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if proc.match_pred(is_attr_quote).matched() {
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// Quoted attribute value.
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process_quoted_val(proc, should_collapse_and_trim_value_ws)
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} else {
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// Unquoted attribute value.
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process_attr_unquoted_val(proc)?;
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Ok(AttrType::Unquoted)
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}
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}
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}
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