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Linux gallant-poincare.82-165-91-112.plesk.page 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64
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'use strict';
const types = require('../../tokenizer/types.cjs');
const SOLIDUS = 0x002F; // U+002F SOLIDUS (/)
// Media Queries Level 3 defines terms of <ratio> as a positive (not zero or negative)
// integers (see https://drafts.csswg.org/mediaqueries-3/#values)
// However, Media Queries Level 4 removes any definition of values
// (see https://drafts.csswg.org/mediaqueries-4/#values) and refers to
// CSS Values and Units for detail. In CSS Values and Units Level 4 a <ratio>
// definition was added (see https://drafts.csswg.org/css-values-4/#ratios) which
// defines ratio as "<number [0,∞]> [ / <number [0,∞]> ]?" and based on it
// any constrains on terms were removed. Parser also doesn't test numbers
// in any way to make possible for linting and fixing them by the tools using CSSTree.
// An additional syntax examination may be applied by a lexer.
function consumeTerm() {
this.skipSC();
switch (this.tokenType) {
case types.Number:
return this.Number();
case types.Function:
return this.Function(this.readSequence, this.scope.Value);
default:
this.error('Number of function is expected');
}
}
const name = 'Ratio';
const structure = {
left: ['Number', 'Function'],
right: ['Number', 'Function', null]
};
// <number [0,∞]> [ / <number [0,∞]> ]?
function parse() {
const start = this.tokenStart;
const left = consumeTerm.call(this);
let right = null;
this.skipSC();
if (this.isDelim(SOLIDUS)) {
this.eatDelim(SOLIDUS);
right = consumeTerm.call(this);
}
return {
type: 'Ratio',
loc: this.getLocation(start, this.tokenStart),
left,
right
};
}
function generate(node) {
this.node(node.left);
this.token(types.Delim, '/');
if (node.right) {
this.node(node.right);
} else {
this.node(types.Number, 1);
}
}
exports.generate = generate;
exports.name = name;
exports.parse = parse;
exports.structure = structure;