kopia lustrzana https://github.com/Tldraw/Tldraw
65 wiersze
1.6 KiB
TypeScript
65 wiersze
1.6 KiB
TypeScript
import {
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Editor,
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TLBaseShape,
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TLImageShapeCrop,
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TLShapePartial,
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Vec,
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structuredClone,
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} from '@tldraw/editor'
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export type ShapeWithCrop = TLBaseShape<string, { w: number; h: number; crop: TLImageShapeCrop }>
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export function getTranslateCroppedImageChange(
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editor: Editor,
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shape: TLBaseShape<string, { w: number; h: number; crop: TLImageShapeCrop }>,
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delta: Vec
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) {
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if (!shape) {
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throw Error('Needs to translate a cropped shape!')
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}
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const { crop: oldCrop } = shape.props
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if (!oldCrop) {
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// can't translate a shape that doesn't have an existing crop
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return
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}
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const flatten: 'x' | 'y' | null = editor.inputs.shiftKey
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? Math.abs(delta.x) < Math.abs(delta.y)
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? 'x'
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: 'y'
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: null
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if (flatten === 'x') {
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delta.x = 0
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} else if (flatten === 'y') {
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delta.y = 0
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}
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delta.rot(-shape.rotation)
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// original (uncropped) width and height of shape
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const w = (1 / (oldCrop.bottomRight.x - oldCrop.topLeft.x)) * shape.props.w
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const h = (1 / (oldCrop.bottomRight.y - oldCrop.topLeft.y)) * shape.props.h
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const yCrop = oldCrop.bottomRight.y - oldCrop.topLeft.y
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const xCrop = oldCrop.bottomRight.x - oldCrop.topLeft.x
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const newCrop = structuredClone(oldCrop)
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newCrop.topLeft.x = Math.min(1 - xCrop, Math.max(0, newCrop.topLeft.x - delta.x / w))
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newCrop.topLeft.y = Math.min(1 - yCrop, Math.max(0, newCrop.topLeft.y - delta.y / h))
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newCrop.bottomRight.x = newCrop.topLeft.x + xCrop
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newCrop.bottomRight.y = newCrop.topLeft.y + yCrop
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const partial: TLShapePartial<typeof shape> = {
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id: shape.id,
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type: shape.type,
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props: {
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crop: newCrop,
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},
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}
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return partial
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}
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