Key navigation

To be used for mapping keyboard arrow press events

Ce script ne devrait pas être installé directement. C'est une librairie créée pour d'autres scripts. Elle doit être inclus avec la commande // @require https://update.greasyforks.org/scripts/396703/1100259/Key%20navigation.js

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Enveloppe les lignes

(() => {
  'use strict';

  const setUpKeyNavigation = ({
    onDownPressed,
    onLeftPressed,
    onRightPressed,
    onUpPressed,
    preventDefault,
    stopPropagation,
  }) => {
    document.addEventListener('keydown', (event) => {
      const operation = {
        ArrowDown: (e) => executeFn(onDownPressed, e),
        ArrowLeft: (e) => executeFn(onLeftPressed, e),
        ArrowRight: (e) => executeFn(onRightPressed, e),
        ArrowUp: (e) => executeFn(onUpPressed, e),
      }[event.key];

      if (operation) operation(event);

      preventDefault && event.preventDefault();
      stopPropagation && event.stopPropagation();
    });
  };

  const setUpAnchorNavigation = (selectorsMap) => {
    const downHref = getAnchorHref(selectorsMap.down);
    const leftHref = getAnchorHref(selectorsMap.left);
    const rightHref = getAnchorHref(selectorsMap.right);
    const upHref = getAnchorHref(selectorsMap.up);

    setUpKeyNavigation({
      onDownPressed: generateNavigationEvent(downHref),
      onLeftPressed: generateNavigationEvent(leftHref),
      onRightPressed: generateNavigationEvent(rightHref),
      onUpPressed: generateNavigationEvent(upHref),
    });
  };

  const getElement = (selector) => {
    return selector ? document.querySelector(selector) : undefined;
  };

  const getAnchorHref = (selector) => {
    return getElement(selector)?.href;
  };

  const generateNavigationEvent = (href) => {
    return href ? () => (location.href = href) : undefined;
  };

  const executeFn = (fn, ...parameters) => {
    return typeof fn === 'function' && fn(...parameters);
  };

  window.setUpAnchorNavigation = setUpAnchorNavigation;
  window.setUpKeyNavigation = setUpKeyNavigation;
})();