| 1 | const euclideanDistance = require('./euclidean_distance');
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| 2 |
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| 3 | const FINE_TOLERANCE = 4;
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| 4 | const GROSS_TOLERANCE = 12;
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| 5 | const INTERVAL = 500;
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| 6 |
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| 7 | module.exports = function isClick(start, end, options = {}) {
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| 8 | const fineTolerance = (options.fineTolerance != null) ? options.fineTolerance : FINE_TOLERANCE;
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| 9 | const grossTolerance = (options.grossTolerance != null) ? options.grossTolerance : GROSS_TOLERANCE;
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| 10 | const interval = (options.interval != null) ? options.interval : INTERVAL;
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| 11 |
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| 12 | start.point = start.point || end.point;
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| 13 | start.time = start.time || end.time;
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| 14 | const moveDistance = euclideanDistance(start.point, end.point);
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| 15 |
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| 16 | return moveDistance < fineTolerance ||
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| 17 | (moveDistance < grossTolerance && (end.time - start.time) < interval);
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| 18 | };
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