kopia lustrzana https://github.com/Tldraw/Tldraw
132 wiersze
3.2 KiB
TypeScript
132 wiersze
3.2 KiB
TypeScript
import { getFromCache, uniqueId } from 'utils/utils'
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import vec from 'utils/vec'
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import { PolylineShape, ShapeType } from 'types'
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import { intersectPolylineBounds } from 'utils/intersections'
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import {
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boundsContainPolygon,
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getBoundsFromPoints,
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translateBounds,
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} from 'utils'
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import { defaultStyle, getShapeStyle } from 'state/shape-styles'
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import { registerShapeUtils } from './register'
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const polyline = registerShapeUtils<PolylineShape>({
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boundsCache: new WeakMap([]),
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defaultProps: {
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id: uniqueId(),
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type: ShapeType.Polyline,
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name: 'Polyline',
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parentId: 'page1',
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childIndex: 0,
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point: [0, 0],
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points: [[0, 0]],
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rotation: 0,
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style: defaultStyle,
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},
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shouldRender(shape, prev) {
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return shape.points !== prev.points || shape.style !== prev.style
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},
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render(shape) {
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const { id, points } = shape
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const styles = getShapeStyle(shape.style)
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return (
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<polyline
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id={id}
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points={points.toString()}
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stroke={styles.stroke}
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strokeWidth={styles.strokeWidth}
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fill={shape.style.isFilled ? styles.fill : 'none'}
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/>
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)
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},
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getBounds(shape) {
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const bounds = getFromCache(this.boundsCache, shape, (cache) => {
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cache.set(shape, getBoundsFromPoints(shape.points))
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})
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return translateBounds(bounds, shape.point)
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},
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getRotatedBounds(shape) {
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return this.getBounds(shape)
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},
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getCenter(shape) {
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const bounds = this.getBounds(shape)
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return [bounds.minX + bounds.width / 2, bounds.minY + bounds.height / 2]
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},
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hitTest(shape, point) {
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const pt = vec.sub(point, shape.point)
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let prev = shape.points[0]
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for (let i = 1; i < shape.points.length; i++) {
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const curr = shape.points[i]
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if (vec.distanceToLineSegment(prev, curr, pt) < 4) {
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return true
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}
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prev = curr
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}
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return false
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},
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hitTestBounds(this, shape, brushBounds) {
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const b = this.getBounds(shape)
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const center = [b.minX + b.width / 2, b.minY + b.height / 2]
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const rotatedCorners = [
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[b.minX, b.minY],
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[b.maxX, b.minY],
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[b.maxX, b.maxY],
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[b.minX, b.maxY],
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].map((point) => vec.rotWith(point, center, shape.rotation))
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return (
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boundsContainPolygon(brushBounds, rotatedCorners) ||
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intersectPolylineBounds(
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shape.points.map((point) => vec.add(point, shape.point)),
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brushBounds
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).length > 0
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)
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},
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transform(shape, bounds, { initialShape, scaleX, scaleY }) {
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const initialShapeBounds = this.getBounds(initialShape)
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shape.points = shape.points.map((_, i) => {
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const [x, y] = initialShape.points[i]
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return [
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bounds.width *
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(scaleX < 0
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? 1 - x / initialShapeBounds.width
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: x / initialShapeBounds.width),
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bounds.height *
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(scaleY < 0
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? 1 - y / initialShapeBounds.height
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: y / initialShapeBounds.height),
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]
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})
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shape.point = [bounds.minX, bounds.minY]
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return this
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},
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transformSingle(shape, bounds, info) {
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this.transform(shape, bounds, info)
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return this
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},
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canTransform: true,
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canChangeAspectRatio: true,
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canStyleFill: false,
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})
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export default polyline
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