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fix drag preview on documents and add scroll on drag
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| import { CSSProperties, useEffect } from 'react' | ||
| import { useDragLayer, XYCoord } from 'react-dnd' | ||
| import IconSelector from './IconSelector' | ||
| import { ElementType } from './v2Editor' | ||
|
|
||
| function getItemStyles( | ||
| initialCursorOffset: XYCoord | null, | ||
| initialOffset: XYCoord | null, | ||
| currentOffset: XYCoord | null | ||
| ) { | ||
| if (!initialOffset || !currentOffset || !initialCursorOffset) { | ||
| return { | ||
| display: 'none', | ||
| } | ||
| } | ||
|
|
||
| const x = initialCursorOffset?.x + (currentOffset.x - initialOffset.x) | ||
| const y = initialCursorOffset?.y + (currentOffset.y - initialOffset.y) | ||
| const transform = `translate(${x}px, ${y}px)` | ||
|
|
||
| return { | ||
| transform, | ||
| WebkitTransform: transform, | ||
| } | ||
| } | ||
|
|
||
| const layerStyles: CSSProperties = { | ||
| position: 'fixed', | ||
| pointerEvents: 'none', | ||
| zIndex: 100, | ||
| left: 0, | ||
| top: 0, | ||
| width: '100%', | ||
| height: '100%', | ||
| } | ||
|
|
||
| const isEditorBlock = (itemType: string | symbol | null) => { | ||
| return itemType === ElementType.Block || itemType === ElementType.BlockGroup | ||
| } | ||
|
|
||
| const DragLayer = () => { | ||
| const { | ||
| item, | ||
| itemType, | ||
| isDragging, | ||
| initialCursorOffset, | ||
| initialFileOffset, | ||
| currentFileOffset, | ||
| } = useDragLayer((monitor) => ({ | ||
| item: monitor.getItem(), | ||
| itemType: monitor.getItemType(), | ||
| initialCursorOffset: monitor.getInitialClientOffset(), | ||
| initialFileOffset: monitor.getInitialSourceClientOffset(), | ||
| currentFileOffset: monitor.getSourceClientOffset(), | ||
| isDragging: monitor.isDragging(), | ||
| })) | ||
|
|
||
| useEffect(() => { | ||
| if (!isEditorBlock(itemType)) { | ||
| return | ||
| } | ||
|
|
||
| const editorScrollview = document.getElementById('editor-scrollview') | ||
| if (!editorScrollview) { | ||
| return | ||
| } | ||
|
|
||
| let animationFrameId: number | null = null | ||
| const scrollThresholdPixels = 120 | ||
|
|
||
| const scrollSmoothly = (scrollAmount: number) => { | ||
| if (animationFrameId) { | ||
| cancelAnimationFrame(animationFrameId) | ||
| } | ||
|
|
||
| const step = () => { | ||
| editorScrollview.scrollBy({ top: scrollAmount }) | ||
| animationFrameId = requestAnimationFrame(step) | ||
| } | ||
|
|
||
| animationFrameId = requestAnimationFrame(step) | ||
| } | ||
|
|
||
| const handleDragOver = (e: DragEvent) => { | ||
| const rect = document.body.getBoundingClientRect() | ||
| const cursorY = e.clientY | ||
|
|
||
| if (cursorY >= rect.top && cursorY <= rect.bottom) { | ||
| const relativeY = cursorY - rect.top | ||
| const viewportHeight = rect.height | ||
|
|
||
| if (animationFrameId) { | ||
| cancelAnimationFrame(animationFrameId) | ||
| animationFrameId = null | ||
| } | ||
|
|
||
| if (relativeY > viewportHeight - scrollThresholdPixels) { | ||
| const distanceFromBottom = viewportHeight - relativeY | ||
| const scrollSpeed = Math.max( | ||
| 2, | ||
| (scrollThresholdPixels - distanceFromBottom) / 6 | ||
| ) | ||
| scrollSmoothly(scrollSpeed) | ||
| } else if (relativeY < scrollThresholdPixels) { | ||
| const scrollSpeed = Math.max( | ||
| 2, | ||
| (scrollThresholdPixels - relativeY) / 6 | ||
| ) | ||
| scrollSmoothly(-scrollSpeed) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| const handleDragEnd = () => { | ||
| if (animationFrameId) { | ||
| cancelAnimationFrame(animationFrameId) | ||
| animationFrameId = null | ||
| } | ||
| } | ||
|
|
||
| document.body.addEventListener('dragover', handleDragOver) | ||
| document.addEventListener('dragend', handleDragEnd) | ||
| document.addEventListener('drop', handleDragEnd) | ||
|
|
||
| return () => { | ||
| if (animationFrameId) { | ||
| cancelAnimationFrame(animationFrameId) | ||
| } | ||
| document.body.removeEventListener('dragover', handleDragOver) | ||
| document.removeEventListener('dragend', handleDragEnd) | ||
| document.removeEventListener('drop', handleDragEnd) | ||
| } | ||
| }, [itemType]) | ||
|
|
||
| if (!isDragging || isEditorBlock(itemType)) { | ||
| return null | ||
| } | ||
|
|
||
| return ( | ||
| <div style={layerStyles}> | ||
| <div | ||
| style={getItemStyles( | ||
| initialCursorOffset, | ||
| initialFileOffset, | ||
| currentFileOffset | ||
| )} | ||
| > | ||
| <div className="p-1 bg-ceramic-200 rounded-md max-w-48 text-sm opacity-25 truncate flex gap-x-1 items-center py-2 -translate-x-1/2 -translate-y-1/2 scale-[.85] -rotate-6"> | ||
| <IconSelector | ||
| workspaceId={item.workspaceId} | ||
| documentId={item.id} | ||
| disabled={true} | ||
| /> | ||
| {item.title || 'Untitled'} | ||
| </div> | ||
| </div> | ||
| </div> | ||
| ) | ||
| } | ||
|
|
||
| export default DragLayer |
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