63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
// Module ID: 5670
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// Function ID: 5671
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// Name: VelocityTracker
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// Dependencies: [5638, 5639]
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// Module 5670 (VelocityTracker)
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import VelocityTracker from "_classCallCheck";
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class VelocityTracker {
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constructor() {
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tmp = VelocityTracker(this, VelocityTracker);
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this.lastUpdateTime = Date.now();
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this.velocity = { x: 0, y: 0 };
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this.timeoutId = null;
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return;
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}
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}
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const items = [
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{
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key: "computeVelocity",
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value: function computeVelocity(arg0, absoluteLastScrollOffset, arg2, arg3) {
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let self = this;
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self = this;
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let closure_0 = arg3;
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this.cleanUp();
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const timestamp = Date.now();
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const diff = arg0 - absoluteLastScrollOffset;
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const result = diff / Math.max(1, timestamp - this.lastUpdateTime);
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this.lastUpdateTime = timestamp;
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let num = 0;
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if (arg2) {
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num = result;
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}
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this.velocity.x = num;
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let num2 = 0;
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if (!arg2) {
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num2 = result;
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}
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self.velocity.y = num2;
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arg3(self.velocity, false);
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self.timeoutId = setTimeout(() => {
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self.cleanUp();
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self.lastUpdateTime = Date.now();
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self.velocity.x = 0;
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self.velocity.y = 0;
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callback(self.velocity, true);
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}, 100);
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}
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},
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{
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key: "cleanUp",
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value: function cleanUp() {
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const self = this;
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if (null !== this.timeoutId) {
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const _clearTimeout = clearTimeout;
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clearTimeout(self.timeoutId);
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self.timeoutId = null;
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}
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}
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}
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];
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export const VelocityTracker = require("_createClass")(VelocityTracker, items);
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