571 lines
14 KiB
TypeScript
571 lines
14 KiB
TypeScript
import vec from 'utils/vec'
|
|
import {
|
|
getArcLength,
|
|
uniqueId,
|
|
getSvgPathFromStroke,
|
|
rng,
|
|
getBoundsFromPoints,
|
|
translateBounds,
|
|
pointInBounds,
|
|
pointInCircle,
|
|
circleFromThreePoints,
|
|
isAngleBetween,
|
|
getPerfectDashProps,
|
|
getFromCache,
|
|
} from 'utils'
|
|
import {
|
|
ArrowShape,
|
|
DashStyle,
|
|
Decoration,
|
|
ShapeHandle,
|
|
ShapeType,
|
|
} from 'types'
|
|
import {
|
|
intersectArcBounds,
|
|
intersectLineSegmentBounds,
|
|
} from 'utils/intersections'
|
|
import { defaultStyle, getShapeStyle } from 'state/shape-styles'
|
|
import getStroke from 'perfect-freehand'
|
|
import React from 'react'
|
|
import { registerShapeUtils } from './register'
|
|
|
|
const pathCache = new WeakMap<ArrowShape, string>([])
|
|
|
|
// A cache for semi-expensive circles calculated from three points
|
|
function getCtp(shape: ArrowShape) {
|
|
const { start, end, bend } = shape.handles
|
|
return circleFromThreePoints(start.point, end.point, bend.point)
|
|
}
|
|
|
|
const arrow = registerShapeUtils<ArrowShape>({
|
|
boundsCache: new WeakMap([]),
|
|
|
|
defaultProps: {
|
|
id: uniqueId(),
|
|
type: ShapeType.Arrow,
|
|
|
|
name: 'Arrow',
|
|
parentId: 'page1',
|
|
childIndex: 0,
|
|
point: [0, 0],
|
|
rotation: 0,
|
|
|
|
bend: 0,
|
|
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],
|
|
},
|
|
},
|
|
decorations: {
|
|
start: null,
|
|
middle: null,
|
|
end: Decoration.Arrow,
|
|
},
|
|
style: {
|
|
...defaultStyle,
|
|
isFilled: false,
|
|
},
|
|
},
|
|
|
|
create(props) {
|
|
const shape = {
|
|
...this.defaultProps,
|
|
...props,
|
|
decorations: {
|
|
...this.defaultProps.decorations,
|
|
...props.decorations,
|
|
},
|
|
style: {
|
|
...this.defaultProps.style,
|
|
...props.style,
|
|
isFilled: false,
|
|
},
|
|
}
|
|
|
|
// shape.handles.bend.point = getBendPoint(shape)
|
|
|
|
return shape
|
|
},
|
|
|
|
shouldRender(shape, prev) {
|
|
return shape.handles !== prev.handles || shape.style !== prev.style
|
|
},
|
|
|
|
render(shape) {
|
|
const { id, bend, handles, style } = shape
|
|
const { start, end, bend: _bend } = handles
|
|
|
|
const isStraightLine = vec.isEqual(
|
|
_bend.point,
|
|
vec.med(start.point, end.point)
|
|
)
|
|
|
|
const styles = getShapeStyle(style)
|
|
|
|
const strokeWidth = +styles.strokeWidth
|
|
|
|
const sw = strokeWidth * 1.618
|
|
|
|
const arrowDist = vec.dist(start.point, end.point)
|
|
|
|
let shaftPath: JSX.Element
|
|
let startAngle: number
|
|
let endAngle: number
|
|
|
|
if (isStraightLine) {
|
|
const straight_sw =
|
|
strokeWidth *
|
|
(style.dash === DashStyle.Draw && bend === 0 ? 0.5 : 1.618)
|
|
|
|
if (shape.style.dash === DashStyle.Draw && !pathCache.has(shape)) {
|
|
renderFreehandArrowShaft(shape)
|
|
}
|
|
|
|
const path =
|
|
shape.style.dash === DashStyle.Draw
|
|
? pathCache.get(shape)
|
|
: 'M' + start.point + 'L' + end.point
|
|
|
|
const { strokeDasharray, strokeDashoffset } = getPerfectDashProps(
|
|
arrowDist,
|
|
sw,
|
|
shape.style.dash,
|
|
2
|
|
)
|
|
|
|
startAngle = Math.PI
|
|
|
|
endAngle = 0
|
|
|
|
// Straight arrow path
|
|
shaftPath = (
|
|
<>
|
|
<path
|
|
d={path}
|
|
fill="none"
|
|
stroke="transparent"
|
|
strokeWidth={Math.max(8, strokeWidth * 2)}
|
|
strokeDasharray="none"
|
|
strokeDashoffset="none"
|
|
strokeLinecap="round"
|
|
/>
|
|
<path
|
|
d={path}
|
|
fill={styles.stroke}
|
|
stroke={styles.stroke}
|
|
strokeWidth={straight_sw}
|
|
strokeDasharray={strokeDasharray}
|
|
strokeDashoffset={strokeDashoffset}
|
|
strokeLinecap="round"
|
|
/>
|
|
</>
|
|
)
|
|
} else {
|
|
const circle = getCtp(shape)
|
|
|
|
const path = getArrowArcPath(start, end, circle, bend)
|
|
|
|
const { strokeDasharray, strokeDashoffset } = getPerfectDashProps(
|
|
getArcLength(
|
|
[circle[0], circle[1]],
|
|
circle[2],
|
|
start.point,
|
|
end.point
|
|
) - 1,
|
|
sw,
|
|
shape.style.dash,
|
|
2
|
|
)
|
|
|
|
startAngle =
|
|
vec.angle([circle[0], circle[1]], start.point) -
|
|
vec.angle(end.point, start.point) +
|
|
(Math.PI / 2) * (bend > 0 ? 0.98 : -0.98)
|
|
|
|
endAngle =
|
|
vec.angle([circle[0], circle[1]], end.point) -
|
|
vec.angle(start.point, end.point) +
|
|
(Math.PI / 2) * (bend > 0 ? 0.98 : -0.98)
|
|
|
|
// Curved arrow path
|
|
shaftPath = (
|
|
<>
|
|
<path
|
|
d={path}
|
|
fill="none"
|
|
stroke="transparent"
|
|
strokeWidth={Math.max(8, strokeWidth * 2)}
|
|
strokeDasharray="none"
|
|
strokeDashoffset="none"
|
|
strokeLinecap="round"
|
|
/>
|
|
<path
|
|
d={path}
|
|
fill="none"
|
|
stroke={styles.stroke}
|
|
strokeWidth={sw}
|
|
strokeDasharray={strokeDasharray}
|
|
strokeDashoffset={strokeDashoffset}
|
|
strokeLinecap="round"
|
|
></path>
|
|
</>
|
|
)
|
|
}
|
|
|
|
return (
|
|
<g id={id}>
|
|
{shaftPath}
|
|
{shape.decorations.start === Decoration.Arrow && (
|
|
<path
|
|
d={getArrowHeadPath(shape, start.point, startAngle)}
|
|
fill="none"
|
|
stroke={styles.stroke}
|
|
strokeWidth={sw}
|
|
strokeDashoffset="none"
|
|
strokeDasharray="none"
|
|
/>
|
|
)}
|
|
{shape.decorations.end === Decoration.Arrow && (
|
|
<path
|
|
d={getArrowHeadPath(shape, end.point, endAngle)}
|
|
fill="none"
|
|
stroke={styles.stroke}
|
|
strokeWidth={sw}
|
|
strokeDashoffset="none"
|
|
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) {
|
|
const bounds = getFromCache(this.boundsCache, shape, (cache) => {
|
|
const { start, bend, end } = shape.handles
|
|
cache.set(
|
|
shape,
|
|
getBoundsFromPoints([start.point, bend.point, end.point])
|
|
)
|
|
})
|
|
|
|
return translateBounds(bounds, shape.point)
|
|
},
|
|
|
|
getRotatedBounds(shape) {
|
|
const { start, bend, end } = shape.handles
|
|
return translateBounds(
|
|
getBoundsFromPoints([start.point, bend.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 } = 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)
|
|
|
|
// let nw = initialShape.point[0] / initialShapeBounds.width
|
|
// let nh = initialShape.point[1] / initialShapeBounds.height
|
|
|
|
// shape.point = [
|
|
// bounds.width * (scaleX < 0 ? 1 - nw : nw),
|
|
// bounds.height * (scaleY < 0 ? 1 - nh : nh),
|
|
// ]
|
|
|
|
shape.point = [bounds.minX, bounds.minY]
|
|
|
|
const handles = ['start', 'end']
|
|
|
|
handles.forEach((handle) => {
|
|
const [x, y] = initialShape.handles[handle].point
|
|
const nw = x / initialShapeBounds.width
|
|
const nh = y / initialShapeBounds.height
|
|
|
|
shape.handles[handle].point = [
|
|
bounds.width * (scaleX < 0 ? 1 - nw : nw),
|
|
bounds.height * (scaleY < 0 ? 1 - nh : nh),
|
|
]
|
|
})
|
|
|
|
const { start, bend, end } = shape.handles
|
|
|
|
const dist = vec.dist(start.point, end.point)
|
|
|
|
const midPoint = vec.med(start.point, end.point)
|
|
|
|
const bendDist = (dist / 2) * initialShape.bend
|
|
|
|
const u = vec.uni(vec.vec(start.point, end.point))
|
|
|
|
const point = vec.add(midPoint, vec.mul(vec.per(u), bendDist))
|
|
|
|
bend.point = Math.abs(bendDist) < 10 ? midPoint : point
|
|
|
|
return this
|
|
},
|
|
|
|
onDoublePointHandle(shape, handle) {
|
|
switch (handle) {
|
|
case 'bend': {
|
|
shape.bend = 0
|
|
shape.handles.bend.point = getBendPoint(shape)
|
|
break
|
|
}
|
|
case 'start': {
|
|
shape.decorations.start = shape.decorations.start
|
|
? null
|
|
: Decoration.Arrow
|
|
break
|
|
}
|
|
case 'end': {
|
|
shape.decorations.end = shape.decorations.end ? null : Decoration.Arrow
|
|
break
|
|
}
|
|
}
|
|
|
|
return this
|
|
},
|
|
|
|
onHandleChange(shape, handles) {
|
|
for (const id in handles) {
|
|
const handle = handles[id]
|
|
|
|
shape.handles[handle.id] = handle
|
|
}
|
|
|
|
const midPoint = vec.med(shape.handles.start.point, shape.handles.end.point)
|
|
|
|
if ('bend' in handles) {
|
|
const { start, end, bend } = shape.handles
|
|
|
|
const dist = vec.dist(start.point, end.point)
|
|
|
|
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)
|
|
|
|
if (vec.isEqual(shape.handles.bend.point, midPoint)) {
|
|
shape.bend = 0
|
|
}
|
|
|
|
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)
|
|
|
|
shape.handles = { ...shape.handles }
|
|
|
|
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
|
|
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 renderFreehandArrowShaft(shape: ArrowShape) {
|
|
const { style, id } = shape
|
|
const { start, end } = shape.handles
|
|
|
|
const getRandom = rng(id)
|
|
|
|
const strokeWidth = +getShapeStyle(style).strokeWidth * 2
|
|
|
|
const st = Math.abs(getRandom())
|
|
|
|
const stroke = getStroke(
|
|
[
|
|
start.point,
|
|
...vec.pointsBetween(start.point, end.point),
|
|
end.point,
|
|
end.point,
|
|
end.point,
|
|
],
|
|
{
|
|
size: strokeWidth / 2,
|
|
thinning: 0.5 + getRandom() * 0.3,
|
|
easing: (t) => t * t,
|
|
end: { taper: 1 },
|
|
start: { taper: 1 + 32 * (st * st * st) },
|
|
simulatePressure: true,
|
|
}
|
|
)
|
|
|
|
pathCache.set(shape, getSvgPathFromStroke(stroke))
|
|
}
|
|
|
|
function getArrowHeadPath(shape: ArrowShape, point: number[], angle = 0) {
|
|
const { left, right } = getArrowHeadPoints(shape, point, angle)
|
|
return ['M', left, 'L', point, right].join(' ')
|
|
}
|
|
|
|
function getArrowHeadPoints(shape: ArrowShape, point: number[], angle = 0) {
|
|
const { start, end } = shape.handles
|
|
|
|
const stroke = +getShapeStyle(shape.style).strokeWidth * 2
|
|
|
|
const arrowDist = vec.dist(start.point, end.point)
|
|
|
|
const arrowHeadlength = Math.min(arrowDist / 3, stroke * 4)
|
|
|
|
// Unit vector from start to end
|
|
const u = vec.uni(vec.vec(start.point, end.point))
|
|
|
|
// The end of the arrowhead wings
|
|
const v = vec.rot(vec.mul(vec.neg(u), arrowHeadlength), angle)
|
|
|
|
// Use the shape's random seed to create minor offsets for the angles
|
|
const getRandom = rng(shape.id)
|
|
|
|
return {
|
|
left: vec.add(
|
|
point,
|
|
vec.rot(v, Math.PI / 6 + (Math.PI / 12) * getRandom())
|
|
),
|
|
right: vec.add(
|
|
point,
|
|
vec.rot(v, -(Math.PI / 6) + (Math.PI / 12) * getRandom())
|
|
),
|
|
}
|
|
}
|