508 lines
12 KiB
TypeScript
508 lines
12 KiB
TypeScript
import { v4 as uuid } from 'uuid'
|
|
import * as vec from 'utils/vec'
|
|
import {
|
|
ease,
|
|
getSvgPathFromStroke,
|
|
rng,
|
|
getBoundsFromPoints,
|
|
translateBounds,
|
|
pointsBetween,
|
|
} from 'utils/utils'
|
|
import { ArrowShape, Bounds, ShapeHandle, ShapeType } from 'types'
|
|
import { registerShapeUtils } from './index'
|
|
import { circleFromThreePoints, isAngleBetween } from 'utils/utils'
|
|
import { pointInBounds } from 'utils/bounds'
|
|
import {
|
|
intersectArcBounds,
|
|
intersectLineSegmentBounds,
|
|
} from 'utils/intersections'
|
|
import { pointInCircle } from 'utils/hitTests'
|
|
import { defaultStyle, getShapeStyle } from 'lib/shape-styles'
|
|
import getStroke from 'perfect-freehand'
|
|
|
|
const ctpCache = new WeakMap<ArrowShape['handles'], number[]>()
|
|
const pathCache = new WeakMap<ArrowShape, string>([])
|
|
|
|
function getCtp(shape: ArrowShape) {
|
|
if (!ctpCache.has(shape.handles)) {
|
|
const { start, end, bend } = shape.handles
|
|
ctpCache.set(
|
|
shape.handles,
|
|
circleFromThreePoints(start.point, end.point, bend.point)
|
|
)
|
|
}
|
|
|
|
return ctpCache.get(shape.handles)
|
|
}
|
|
|
|
const arrow = registerShapeUtils<ArrowShape>({
|
|
boundsCache: new WeakMap([]),
|
|
|
|
create(props) {
|
|
const {
|
|
point = [0, 0],
|
|
points = [
|
|
[0, 0],
|
|
[0, 1],
|
|
],
|
|
handles = {
|
|
start: {
|
|
id: 'start',
|
|
index: 0,
|
|
point: [0, 0],
|
|
},
|
|
end: {
|
|
id: 'end',
|
|
index: 1,
|
|
point: [1, 1],
|
|
},
|
|
bend: {
|
|
id: 'bend',
|
|
index: 2,
|
|
point: [0.5, 0.5],
|
|
},
|
|
},
|
|
} = props
|
|
|
|
return {
|
|
id: uuid(),
|
|
seed: Math.random(),
|
|
type: ShapeType.Arrow,
|
|
isGenerated: false,
|
|
name: 'Arrow',
|
|
parentId: 'page0',
|
|
childIndex: 0,
|
|
point,
|
|
rotation: 0,
|
|
isAspectRatioLocked: false,
|
|
isLocked: false,
|
|
isHidden: false,
|
|
bend: 0,
|
|
points,
|
|
handles,
|
|
decorations: {
|
|
start: null,
|
|
end: null,
|
|
middle: null,
|
|
},
|
|
...props,
|
|
style: {
|
|
...defaultStyle,
|
|
...props.style,
|
|
isFilled: false,
|
|
},
|
|
}
|
|
},
|
|
|
|
render(shape) {
|
|
const { id, bend, handles } = shape
|
|
const { start, end, bend: _bend } = handles
|
|
|
|
const arrowDist = vec.dist(start.point, end.point)
|
|
|
|
const showCircle = !vec.isEqual(
|
|
_bend.point,
|
|
vec.med(start.point, end.point)
|
|
)
|
|
|
|
const style = getShapeStyle(shape.style)
|
|
|
|
let body: JSX.Element
|
|
|
|
if (showCircle) {
|
|
if (!ctpCache.has(handles)) {
|
|
ctpCache.set(
|
|
handles,
|
|
circleFromThreePoints(start.point, end.point, _bend.point)
|
|
)
|
|
}
|
|
|
|
const circle = getCtp(shape)
|
|
|
|
if (!pathCache.has(shape)) {
|
|
renderPath(
|
|
shape,
|
|
vec.angle([circle[0], circle[1]], end.point) -
|
|
vec.angle(start.point, end.point) +
|
|
(Math.PI / 2) * (bend > 0 ? 0.98 : -0.98)
|
|
)
|
|
}
|
|
|
|
const path = pathCache.get(shape)
|
|
|
|
body = (
|
|
<>
|
|
<path
|
|
d={getArrowArcPath(start, end, circle, bend)}
|
|
fill="none"
|
|
strokeWidth={+style.strokeWidth * 1.85}
|
|
strokeLinecap="round"
|
|
/>
|
|
<path d={path} strokeWidth={+style.strokeWidth * 1.5} />
|
|
</>
|
|
)
|
|
} else {
|
|
if (!pathCache.has(shape)) {
|
|
renderPath(shape)
|
|
}
|
|
|
|
const path = pathCache.get(shape)
|
|
|
|
body = <path d={path} />
|
|
}
|
|
|
|
return (
|
|
<g id={id}>
|
|
{body}
|
|
{/* <circle
|
|
cx={start.point[0]}
|
|
cy={start.point[1]}
|
|
r={Math.max(4, +style.strokeWidth)}
|
|
fill={style.stroke}
|
|
strokeDasharray="none"
|
|
/> */}
|
|
</g>
|
|
)
|
|
},
|
|
|
|
rotateBy(shape, delta) {
|
|
const { start, end, bend } = shape.handles
|
|
const mp = vec.med(start.point, end.point)
|
|
start.point = vec.rotWith(start.point, mp, delta)
|
|
end.point = vec.rotWith(end.point, mp, delta)
|
|
bend.point = vec.rotWith(bend.point, mp, delta)
|
|
|
|
this.onHandleChange(shape, shape.handles)
|
|
|
|
return this
|
|
},
|
|
|
|
rotateTo(shape, rotation, delta) {
|
|
const { start, end, bend } = shape.handles
|
|
const mp = vec.med(start.point, end.point)
|
|
start.point = vec.rotWith(start.point, mp, delta)
|
|
end.point = vec.rotWith(end.point, mp, delta)
|
|
bend.point = vec.rotWith(bend.point, mp, delta)
|
|
|
|
this.onHandleChange(shape, shape.handles)
|
|
|
|
return this
|
|
},
|
|
|
|
getBounds(shape) {
|
|
if (!this.boundsCache.has(shape)) {
|
|
const { start, end } = shape.handles
|
|
this.boundsCache.set(shape, getBoundsFromPoints([start.point, end.point]))
|
|
}
|
|
|
|
return translateBounds(this.boundsCache.get(shape), shape.point)
|
|
},
|
|
|
|
getRotatedBounds(shape) {
|
|
const { start, end } = shape.handles
|
|
return translateBounds(
|
|
getBoundsFromPoints([start.point, end.point], shape.rotation),
|
|
shape.point
|
|
)
|
|
},
|
|
|
|
getCenter(shape) {
|
|
const { start, end } = shape.handles
|
|
return vec.add(shape.point, vec.med(start.point, end.point))
|
|
},
|
|
|
|
hitTest(shape, point) {
|
|
const { start, end, bend } = shape.handles
|
|
if (shape.bend === 0) {
|
|
return (
|
|
vec.distanceToLineSegment(
|
|
start.point,
|
|
end.point,
|
|
vec.sub(point, shape.point)
|
|
) < 4
|
|
)
|
|
}
|
|
|
|
const [cx, cy, r] = getCtp(shape)
|
|
|
|
return !pointInCircle(point, vec.add(shape.point, [cx, cy]), r - 4)
|
|
},
|
|
|
|
hitTestBounds(this, shape, brushBounds) {
|
|
const { start, end, bend } = shape.handles
|
|
|
|
const sp = vec.add(shape.point, start.point)
|
|
const ep = vec.add(shape.point, end.point)
|
|
|
|
if (pointInBounds(sp, brushBounds) || pointInBounds(ep, brushBounds)) {
|
|
return true
|
|
}
|
|
|
|
if (vec.isEqual(vec.med(start.point, end.point), bend.point)) {
|
|
return intersectLineSegmentBounds(sp, ep, brushBounds).length > 0
|
|
} else {
|
|
const [cx, cy, r] = getCtp(shape)
|
|
const cp = vec.add(shape.point, [cx, cy])
|
|
|
|
return intersectArcBounds(sp, ep, cp, r, brushBounds).length > 0
|
|
}
|
|
},
|
|
|
|
transform(shape, bounds, { initialShape, scaleX, scaleY }) {
|
|
const initialShapeBounds = this.getBounds(initialShape)
|
|
|
|
shape.point = [bounds.minX, bounds.minY]
|
|
|
|
shape.points = shape.points.map((_, i) => {
|
|
const [x, y] = initialShape.points[i]
|
|
let nw = x / initialShapeBounds.width
|
|
let nh = y / initialShapeBounds.height
|
|
|
|
if (i === 1) {
|
|
let [x0, y0] = initialShape.points[0]
|
|
if (x0 === x) nw = 1
|
|
if (y0 === y) nh = 1
|
|
}
|
|
|
|
return [
|
|
bounds.width * (scaleX < 0 ? 1 - nw : nw),
|
|
bounds.height * (scaleY < 0 ? 1 - nh : nh),
|
|
]
|
|
})
|
|
|
|
const { start, end, bend } = shape.handles
|
|
|
|
start.point = shape.points[0]
|
|
end.point = shape.points[1]
|
|
|
|
bend.point = getBendPoint(shape)
|
|
|
|
shape.points = [shape.handles.start.point, shape.handles.end.point]
|
|
|
|
return this
|
|
},
|
|
|
|
onHandleChange(shape, handles) {
|
|
// const oldBounds = this.getRotatedBounds(shape)
|
|
// const prevCenter = getBoundsCenter(oldBounds)
|
|
|
|
for (let id in handles) {
|
|
const handle = handles[id]
|
|
|
|
shape.handles[handle.id] = handle
|
|
|
|
if (handle.index < 2) {
|
|
shape.points[handle.index] = handle.point
|
|
}
|
|
|
|
const { start, end, bend } = shape.handles
|
|
|
|
const dist = vec.dist(start.point, end.point)
|
|
|
|
if (handle.id === 'bend') {
|
|
const midPoint = vec.med(start.point, end.point)
|
|
const u = vec.uni(vec.vec(start.point, end.point))
|
|
const ap = vec.add(midPoint, vec.mul(vec.per(u), dist / 2))
|
|
const bp = vec.sub(midPoint, vec.mul(vec.per(u), dist / 2))
|
|
|
|
bend.point = vec.nearestPointOnLineSegment(ap, bp, bend.point, true)
|
|
shape.bend = vec.dist(bend.point, midPoint) / (dist / 2)
|
|
|
|
const sa = vec.angle(end.point, start.point)
|
|
const la = sa - Math.PI / 2
|
|
if (isAngleBetween(sa, la, vec.angle(end.point, bend.point))) {
|
|
shape.bend *= -1
|
|
}
|
|
}
|
|
}
|
|
|
|
shape.handles.bend.point = getBendPoint(shape)
|
|
|
|
// const newBounds = this.getRotatedBounds(shape)
|
|
// const newCenter = getBoundsCenter(newBounds)
|
|
|
|
// shape.point = vec.add(shape.point, vec.neg(vec.sub(newCenter, prevCenter)))
|
|
|
|
return this
|
|
},
|
|
|
|
onSessionComplete(shape) {
|
|
const bounds = this.getBounds(shape)
|
|
|
|
const offset = vec.sub([bounds.minX, bounds.minY], shape.point)
|
|
|
|
this.translateTo(shape, vec.add(shape.point, offset))
|
|
|
|
const { start, end, bend } = shape.handles
|
|
|
|
start.point = vec.sub(start.point, offset)
|
|
end.point = vec.sub(end.point, offset)
|
|
bend.point = vec.sub(bend.point, offset)
|
|
|
|
return this
|
|
},
|
|
|
|
applyStyles(shape, style) {
|
|
Object.assign(shape.style, style)
|
|
shape.style.isFilled = false
|
|
return this
|
|
},
|
|
|
|
canStyleFill: false,
|
|
})
|
|
|
|
export default arrow
|
|
|
|
function getArrowArcPath(
|
|
start: ShapeHandle,
|
|
end: ShapeHandle,
|
|
circle: number[],
|
|
bend: number
|
|
) {
|
|
return [
|
|
'M',
|
|
start.point[0],
|
|
start.point[1],
|
|
'A',
|
|
circle[2],
|
|
circle[2],
|
|
0,
|
|
0,
|
|
bend < 0 ? 0 : 1,
|
|
end.point[0],
|
|
end.point[1],
|
|
].join(' ')
|
|
}
|
|
|
|
function getBendPoint(shape: ArrowShape) {
|
|
const { start, end } = shape.handles
|
|
|
|
const dist = vec.dist(start.point, end.point)
|
|
const midPoint = vec.med(start.point, end.point)
|
|
const bendDist = (dist / 2) * shape.bend * Math.min(1, dist / 128)
|
|
const u = vec.uni(vec.vec(start.point, end.point))
|
|
|
|
return Math.abs(bendDist) < 10
|
|
? midPoint
|
|
: vec.add(midPoint, vec.mul(vec.per(u), bendDist))
|
|
}
|
|
|
|
function getResizeOffset(a: Bounds, b: Bounds) {
|
|
const { minX: x0, minY: y0, width: w0, height: h0 } = a
|
|
const { minX: x1, minY: y1, width: w1, height: h1 } = b
|
|
|
|
let delta: number[]
|
|
|
|
if (h0 === h1 && w0 !== w1) {
|
|
if (x0 !== x1) {
|
|
// moving left edge, pin right edge
|
|
delta = vec.sub([x1, y1 + h1 / 2], [x0, y0 + h0 / 2])
|
|
} else {
|
|
// moving right edge, pin left edge
|
|
delta = vec.sub([x1 + w1, y1 + h1 / 2], [x0 + w0, y0 + h0 / 2])
|
|
}
|
|
} else if (h0 !== h1 && w0 === w1) {
|
|
if (y0 !== y1) {
|
|
// moving top edge, pin bottom edge
|
|
delta = vec.sub([x1 + w1 / 2, y1], [x0 + w0 / 2, y0])
|
|
} else {
|
|
// moving bottom edge, pin top edge
|
|
delta = vec.sub([x1 + w1 / 2, y1 + h1], [x0 + w0 / 2, y0 + h0])
|
|
}
|
|
} else if (x0 !== x1) {
|
|
if (y0 !== y1) {
|
|
// moving top left, pin bottom right
|
|
delta = vec.sub([x1, y1], [x0, y0])
|
|
} else {
|
|
// moving bottom left, pin top right
|
|
delta = vec.sub([x1, y1 + h1], [x0, y0 + h0])
|
|
}
|
|
} else if (y0 !== y1) {
|
|
// moving top right, pin bottom left
|
|
delta = vec.sub([x1 + w1, y1], [x0 + w0, y0])
|
|
} else {
|
|
// moving bottom right, pin top left
|
|
delta = vec.sub([x1 + w1, y1 + h1], [x0 + w0, y0 + h0])
|
|
}
|
|
|
|
return delta
|
|
}
|
|
|
|
function renderPath(shape: ArrowShape, endAngle = 0) {
|
|
const { style, id } = shape
|
|
const { start, end, bend } = shape.handles
|
|
|
|
const getRandom = rng(id)
|
|
const offsetA = getRandom()
|
|
|
|
const strokeWidth = +getShapeStyle(style).strokeWidth * 2
|
|
|
|
const arrowDist = vec.dist(start.point, end.point)
|
|
|
|
const styles = getShapeStyle(shape.style)
|
|
|
|
const sw = +styles.strokeWidth
|
|
|
|
const length = Math.min(arrowDist / 2, 24 + sw * 2)
|
|
const u = vec.uni(vec.vec(start.point, end.point))
|
|
const v = vec.rot(vec.mul(vec.neg(u), length), endAngle)
|
|
|
|
// Start
|
|
const a = start.point
|
|
|
|
// Middle
|
|
const m = vec.add(
|
|
vec.lrp(start.point, end.point, 0.25 + Math.abs(getRandom()) / 2),
|
|
[getRandom() * sw, getRandom() * sw]
|
|
)
|
|
|
|
// End
|
|
const b = end.point
|
|
|
|
// Left
|
|
let c = vec.add(
|
|
end.point,
|
|
vec.rot(v, Math.PI / 6 + (Math.PI / 8) * getRandom())
|
|
)
|
|
|
|
// Right
|
|
let d = vec.add(
|
|
end.point,
|
|
vec.rot(v, -(Math.PI / 6) + (Math.PI / 8) * getRandom())
|
|
)
|
|
|
|
if (getRandom() > 0.5) {
|
|
;[c, d] = [d, c]
|
|
}
|
|
|
|
const points = endAngle
|
|
? [
|
|
// Just the arrowhead
|
|
...pointsBetween(b, c),
|
|
...pointsBetween(c, b),
|
|
...pointsBetween(b, d),
|
|
...pointsBetween(d, b),
|
|
]
|
|
: [
|
|
// The shaft too
|
|
b,
|
|
a,
|
|
...pointsBetween(a, m),
|
|
...pointsBetween(m, b),
|
|
...pointsBetween(b, c),
|
|
...pointsBetween(c, b),
|
|
...pointsBetween(b, d),
|
|
...pointsBetween(d, b),
|
|
]
|
|
|
|
const stroke = getStroke(points, {
|
|
size: 1 + strokeWidth,
|
|
thinning: 0.6,
|
|
easing: (t) => t * t * t * t,
|
|
end: { taper: strokeWidth * 20 },
|
|
start: { taper: strokeWidth * 20 },
|
|
simulatePressure: false,
|
|
})
|
|
|
|
pathCache.set(shape, getSvgPathFromStroke(stroke))
|
|
}
|