To be used for mapping keyboard arrow press events
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.greasyfork.org/scripts/396703/1842192/Key%20navigation.js
(() => {
'use strict';
const setUpKeyNavigation = ({
onDownPressed,
onLeftPressed,
onRightPressed,
onUpPressed,
preventDefault,
stopPropagation,
}) => {
const handler = (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];
executeFn(operation, event);
preventDefault && event.preventDefault();
stopPropagation && event.stopPropagation();
};
document.addEventListener('keydown', handler);
return () => document.removeEventListener('keydown', handler);
};
const setUpAnchorNavigation = (selectorsMap) => {
const downHref = getAnchorHref(selectorsMap.down);
const leftHref = getAnchorHref(selectorsMap.left);
const rightHref = getAnchorHref(selectorsMap.right);
const upHref = getAnchorHref(selectorsMap.up);
return setUpKeyNavigation({
onDownPressed: generateNavigationEvent(downHref),
onLeftPressed: generateNavigationEvent(leftHref),
onRightPressed: generateNavigationEvent(rightHref),
onUpPressed: generateNavigationEvent(upHref),
});
};
const setUpMouseNavigation = ({
onForwardPressed,
onBackwardPressed,
preventDefault,
stopPropagation,
}) => {
const handler = (event) => {
const operation = {
3: (e) => executeFn(onBackwardPressed, e),
4: (e) => executeFn(onForwardPressed, e),
}[event.button];
executeFn(operation, event);
preventDefault && event.preventDefault();
stopPropagation && event.stopPropagation();
};
window.addEventListener('mouseup', handler, true);
return () => window.removeEventListener('mouseup', handler, true);
};
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;
window.setUpMouseNavigation = setUpMouseNavigation;
})();