82 lines
2.8 KiB
TypeScript
82 lines
2.8 KiB
TypeScript
// Official spec defined code points.
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// See https://infra.spec.whatwg.org/#code-points for spec.
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import {writeFileSync} from 'fs';
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import {RUST_OUT_DIR} from './_common';
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import {join} from 'path';
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const rangeInclusive = (from: number, to: number) => Array.from({length: to - from + 1}, (_, i) => from + i);
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const invert = (codepoints: number[]) => Array.from({length: 256}, (_, i) => codepoints.includes(i) ? undefined : i).filter(c => c != undefined);
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const c = (char: string) => char.charCodeAt(0);
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// Also update gen/tries.json when changing whitespace definition.
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const WHITESPACE = [0x09, 0x0a, 0x0c, 0x0d, 0x20];
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const C0_CONTROL = rangeInclusive(0, 0x1f);
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const CONTROL = [...C0_CONTROL, ...rangeInclusive(0x7f, 0x9f)];
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const DIGIT = rangeInclusive(c('0'), c('9'));
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const UPPER_HEX_DIGIT = [...DIGIT, ...rangeInclusive(c('A'), c('F'))];
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const LOWER_HEX_DIGIT = [...DIGIT, ...rangeInclusive(c('a'), c('f'))];
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const HEX_DIGIT = [...UPPER_HEX_DIGIT, ...LOWER_HEX_DIGIT];
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const UPPER_ALPHA = rangeInclusive(c('A'), c('Z'));
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const LOWER_ALPHA = rangeInclusive(c('a'), c('z'));
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const ALPHA = [...UPPER_ALPHA, ...LOWER_ALPHA];
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const ALPHANUMERIC = [...DIGIT, ...ALPHA];
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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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const ATTR_NAME_CHAR = invert([...CONTROL, c(' '), c('"'), c('\''), c('>'), c('/'), c('=')]);
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const DOUBLE_QUOTE = [c('"')];
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const SINGLE_QUOTE = [c('\'')];
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// Valid attribute quote characters.
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// See https://html.spec.whatwg.org/multipage/introduction.html#intro-early-example for spec.
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// Backtick is not a valid quote character according to spec.
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const ATTR_QUOTE = [...DOUBLE_QUOTE, ...SINGLE_QUOTE];
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// Valid unquoted attribute value characters.
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// See https://html.spec.whatwg.org/multipage/syntax.html#unquoted for spec.
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const NOT_UNQUOTED_ATTR_VAL_CHAR = [...WHITESPACE, c('"'), c('\''), c('='), c('<'), c('>'), c('`')];
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// Tag names may only use ASCII alphanumerics. However, some people also use `:` and `-`.
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// See https://html.spec.whatwg.org/multipage/syntax.html#syntax-tag-name for spec.
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const TAG_NAME_CHAR = [...ALPHANUMERIC, c(':'), c('-')];
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const output = `
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pub struct Lookup {
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table: [bool; 256],
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}
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impl std::ops::Index<u8> for Lookup {
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type Output = bool;
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fn index(&self, c: u8) -> &Self::Output {
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&self.table[c as usize]
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}
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}
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` + Object.entries({
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WHITESPACE,
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DIGIT,
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UPPER_HEX_DIGIT,
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LOWER_HEX_DIGIT,
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HEX_DIGIT,
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ATTR_NAME_CHAR,
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DOUBLE_QUOTE,
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SINGLE_QUOTE,
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ATTR_QUOTE,
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NOT_UNQUOTED_ATTR_VAL_CHAR,
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TAG_NAME_CHAR,
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})
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.map(([name, points]) => (`
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pub static ${name}: &'static Lookup = &Lookup {
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table: [${
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Array.from({length: 256}, (_, i) => points.includes(i)).join(', ')
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}],
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};`))
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.join('\n\n');
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writeFileSync(join(RUST_OUT_DIR, 'codepoints.rs'), output);
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