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'use strict';
const types = require('../../tokenizer/types.cjs');
const SOLIDUS = 0x002F; // U+002F SOLIDUS (/)
const name = 'Feature';
const structure = {
kind: String,
name: String,
value: ['Identifier', 'Number', 'Dimension', 'Ratio', 'Function', null]
};
function parse(kind) {
const start = this.tokenStart;
let name;
let value = null;
this.eat(types.LeftParenthesis);
this.skipSC();
name = this.consume(types.Ident);
this.skipSC();
if (this.tokenType !== types.RightParenthesis) {
this.eat(types.Colon);
this.skipSC();
switch (this.tokenType) {
case types.Number:
if (this.lookupNonWSType(1) === types.Delim) {
value = this.Ratio();
} else {
value = this.Number();
}
break;
case types.Dimension:
value = this.Dimension();
break;
case types.Ident:
value = this.Identifier();
break;
case types.Function:
value = this.parseWithFallback(
() => {
const res = this.Function(this.readSequence, this.scope.Value);
this.skipSC();
if (this.isDelim(SOLIDUS)) {
this.error();
}
return res;
},
() => {
return this.Ratio();
}
);
break;
default:
this.error('Number, dimension, ratio or identifier is expected');
}
this.skipSC();
}
if (!this.eof) {
this.eat(types.RightParenthesis);
}
return {
type: 'Feature',
loc: this.getLocation(start, this.tokenStart),
kind,
name,
value
};
}
function generate(node) {
this.token(types.LeftParenthesis, '(');
this.token(types.Ident, node.name);
if (node.value !== null) {
this.token(types.Colon, ':');
this.node(node.value);
}
this.token(types.RightParenthesis, ')');
}
exports.generate = generate;
exports.name = name;
exports.parse = parse;
exports.structure = structure;
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