| 1 | /**
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| 2 | * Module dependencies.
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| 3 | */
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| 4 |
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| 5 | const specificity = require('specificity');
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| 6 |
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| 7 | /**
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| 8 | * Returns specificity based on selector text and tokens.
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| 9 | *
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| 10 | * @param {String} selector
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| 11 | * @param {Array} tokens
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| 12 | * @api private.
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| 13 | */
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| 14 |
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| 15 | function getSpecificity(text) {
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| 16 | const spec = specificity.calculate(text);
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| 17 |
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| 18 | return spec[0].specificity.split(',');
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| 19 | }
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| 20 |
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| 21 | /**
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| 22 | * CSS selector constructor.
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| 23 | *
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| 24 | * @param {String} selector text
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| 25 | * @param {Array} optionally, precalculated specificity
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| 26 | * @api public
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| 27 | */
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| 28 |
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| 29 | module.exports = (text, spec) => {
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| 30 | let _spec = spec;
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| 31 |
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| 32 | const /**
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| 33 | * Lazy specificity getter
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| 34 | *
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| 35 | * @api public
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| 36 | */
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| 37 |
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| 38 | _specificity = () => {
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| 39 | if (!spec) {
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| 40 | _spec = getSpecificity(text);
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| 41 | }
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| 42 | return _spec;
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| 43 | };
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| 44 |
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| 45 | return {
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| 46 | spec: _spec,
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| 47 |
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| 48 | specificity: _specificity
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| 49 | };
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| 50 | };
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