491f0cd08a
* Copyright headers 1 * Licence headers 2 * Copyright Headers 3 * Copyright Headers 4 * Copyright Headers 5 * Copyright Headers 6 * Copyright headers 7 * Add copyright headers for html and config file * Replace license files and update package.json * Update with CLA * lint
32 lines
903 B
TypeScript
32 lines
903 B
TypeScript
/*
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Copyright 2024 New Vector Ltd.
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Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
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Please see LICENSE files in the repository root for full details.
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*/
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/**
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* Different browsers use different deltaModes. This causes different behaviour.
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* To avoid that we use this function to convert any event to pixels.
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* @param {WheelEvent} event to normalize
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* @returns {WheelEvent} normalized event event
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*/
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export function normalizeWheelEvent({ deltaMode, deltaX, deltaY, deltaZ, ...event }: WheelEvent): WheelEvent {
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const LINE_HEIGHT = 18;
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if (deltaMode === 1) {
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// Units are lines
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deltaX *= LINE_HEIGHT;
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deltaY *= LINE_HEIGHT;
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deltaZ *= LINE_HEIGHT;
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}
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return new WheelEvent("syntheticWheel", {
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deltaMode: 0,
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deltaY,
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deltaX,
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deltaZ,
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...event,
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});
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}
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