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import { clamp } from '@agent/lib/util'; |
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import { useLayoutEffect, useRef } from '@wordpress/element'; |
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|
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export const useDraggable = ({ el, open, initialPosition, onDragEnd }) => { |
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const offset = useRef({ x: 0, y: 0 }); |
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const pointerIdRef = useRef(null); |
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const lastPosition = useRef({ |
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x: initialPosition.x, |
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y: initialPosition.y, |
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}); |
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|
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useLayoutEffect(() => { |
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if (!el) return; |
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const id = requestAnimationFrame(() => { |
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el.style.setProperty('left', `${initialPosition.x}px`, 'important'); |
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el.style.setProperty('top', `${initialPosition.y}px`, 'important'); |
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}); |
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return () => cancelAnimationFrame(id); |
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}, [el, initialPosition]); |
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|
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useLayoutEffect(() => { |
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if (!el || !open) return; |
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|
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// keep in bounds |
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const minX = 0; |
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const minY = 0; |
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const maxX = window.innerWidth - el.offsetWidth; |
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const maxY = window.innerHeight - el.offsetHeight; |
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const left = parseFloat(el.style.left) || 0; |
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const top = parseFloat(el.style.top) || 0; |
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const x = clamp(left, minX, maxX); |
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const y = clamp(top, minY, maxY); |
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|
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if (left !== x || top !== y) { |
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el.style.setProperty('left', `${x}px`, 'important'); |
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el.style.setProperty('top', `${y}px`, 'important'); |
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} |
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}, [el, open]); |
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|
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useLayoutEffect(() => { |
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const bg = |
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document.getElementById('wpwrap') || |
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// TODO: is this on all block themes? |
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document.querySelector('.wp-site-blocks'); |
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if (!el || !open || !bg) return; |
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const handle = el.querySelector('[data-extendify-agent-handle]'); |
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if (!(handle instanceof HTMLElement)) return; |
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|
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el.style.setProperty('left', `${initialPosition.x}px`, 'important'); |
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el.style.setProperty('top', `${initialPosition.y}px`, 'important'); |
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|
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const onPointerDown = (e) => { |
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e.preventDefault(); |
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e.stopPropagation(); |
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bg.style.pointerEvents = 'none'; |
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if (pointerIdRef.current !== null) { |
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return; |
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} |
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pointerIdRef.current = e.pointerId; |
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handle.setPointerCapture(e.pointerId); |
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offset.current = { |
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x: e.clientX - el.offsetLeft, |
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y: e.clientY - el.offsetTop, |
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}; |
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document.addEventListener('pointermove', onPointerMove); |
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document.addEventListener('pointerup', onPointerUp); |
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}; |
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|
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const onPointerMove = (e) => { |
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const minX = 0; |
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const minY = 0; |
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const maxX = window.innerWidth - handle.offsetWidth; |
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const maxY = window.innerHeight - handle.offsetHeight; |
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const x = clamp(e.clientX - offset.current.x, minX, maxX); |
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const y = clamp(e.clientY - offset.current.y, minY, maxY); |
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el.style.setProperty('left', `${x}px`, 'important'); |
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el.style.setProperty('top', `${y}px`, 'important'); |
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lastPosition.current = { x, y }; |
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}; |
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|
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const onPointerUp = (e) => { |
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bg.style.pointerEvents = 'auto'; |
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if (pointerIdRef.current !== e.pointerId) { |
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return; |
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} |
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pointerIdRef.current = null; |
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handle.releasePointerCapture(e.pointerId); |
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document.removeEventListener('pointermove', onPointerMove); |
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document.removeEventListener('pointerup', onPointerUp); |
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onDragEnd(lastPosition.current.x, lastPosition.current.y); |
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}; |
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|
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const onBlur = () => onPointerUp(new PointerEvent('pointerup')); |
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const onContextMenu = (e) => { |
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e.preventDefault(); |
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e.stopPropagation(); |
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return false; |
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}; |
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|
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handle.addEventListener('pointerdown', onPointerDown); |
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handle.addEventListener('contextmenu', onContextMenu); |
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handle.addEventListener('blur', onBlur); |
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|
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return () => { |
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handle.removeEventListener('pointerdown', onPointerDown); |
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handle.removeEventListener('blur', onBlur); |
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handle.removeEventListener('contextmenu', onContextMenu); |
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document.removeEventListener('pointermove', onPointerMove); |
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document.removeEventListener('pointerup', onPointerUp); |
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bg.style.pointerEvents = 'auto'; |
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if (pointerIdRef.current !== null) { |
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handle.releasePointerCapture(pointerIdRef.current); |
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pointerIdRef.current = null; |
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} |
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}; |
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}, [el, open, initialPosition.x, initialPosition.y, onDragEnd]); |
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}; |
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