| 1 | import {Transform} from 'vega-dataflow';
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| 2 | import {inherits} from 'vega-util';
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| 3 |
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| 4 | /**
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| 5 | * Operator whose value is simply its parameter hash. This operator is
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| 6 | * useful for enabling reactive updates to values of nested objects.
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| 7 | * @constructor
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| 8 | * @param {object} params - The parameters for this operator.
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| 9 | */
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| 10 | export default function Params(params) {
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| 11 | Transform.call(this, null, params);
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| 12 | }
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| 13 |
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| 14 | inherits(Params, Transform);
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| 15 |
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| 16 | Params.prototype.transform = function(_, pulse) {
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| 17 | this.modified(_.modified());
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| 18 | this.value = _;
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| 19 | return pulse.fork(pulse.NO_SOURCE | pulse.NO_FIELDS); // do not pass tuples
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| 20 | };
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