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* Copyright 2021 Harness Inc. All rights reserved.
* Use of this source code is governed by the PolyForm Shield 1.0.0 license
* that can be found in the licenses directory at the root of this repository, also available at
* https://polyformproject.org/wp-content/uploads/2020/06/PolyForm-Shield-1.0.0.txt.
*/
import React from 'react'
import type { DiagramEngine } from '@projectstorm/react-diagrams-core'
import { Utils } from '@wings-software/uicore'
import { Color } from '@harness/design-system'
import type { DefaultLinkFactory } from './DefaultLinkFactory'
import type { DefaultLinkModel } from './DefaultLinkModel'
import { Event, DiagramDrag } from '../Constants'
export interface DefaultLinkSegmentWidgetProps {
path: string
link: DefaultLinkModel
selected: boolean
forwardRef: React.RefObject<SVGPathElement>
factory: DefaultLinkFactory
diagramEngine: DiagramEngine
onSelection: (selected: boolean) => void
extras: Record<string, any>
}
export function DefaultLinkSegmentWidget(props: DefaultLinkSegmentWidgetProps): JSX.Element {
const { onSelection, link } = props
//NOTE: isDragOver is used to set pointerEvents="none" to plus button on dragOver event
const [isDragOver, setDragOver] = React.useState(false)
const allowAdd = link.getOptions().allowAdd ?? true
const prevColorRef = React.useRef('')
const color = link.getOptions().color
React.useEffect(() => {
prevColorRef.current = color || ''
})
const Bottom = React.cloneElement(
props.factory.generateLinkSegment(
props.link,
props.selected || props.link.isSelected(),
props.path,
allowAdd,
prevColorRef.current
),
{
ref: props.forwardRef
}
)
const BeforePath = React.cloneElement(Bottom, {
stroke: prevColorRef.current,
className: ''
})
const onMouseLeave = React.useCallback(() => {
onSelection(false)
}, [onSelection])
const onMouseEnter = React.useCallback(() => {
onSelection(true)
}, [onSelection])
const onContextMenu = React.useCallback(
event => {
if (!link.isLocked()) {
event?.preventDefault()
link.remove()
}
},
[link]
)
const onClick = React.useCallback(() => {
allowAdd && link.fireEvent({}, Event.AddLinkClicked)
}, [link, allowAdd])
const pathRef = React.useRef<SVGPathElement>()
const [point, setPoint] = React.useState({ x: 0, y: 0 })
React.useEffect(() => {
if (pathRef.current) {
const totalLength = (pathRef.current.getTotalLength?.() || 0) * 0.5
const position = pathRef.current.getPointAtLength?.(totalLength) || { x: 0, y: 0 }
setPoint({ x: position.x, y: position.y })
}
}, [pathRef])
const Top = React.cloneElement(Bottom, {
strokeLinecap: 'round',
onMouseLeave,
onMouseEnter,
...props.extras,
ref: pathRef,
'data-linkid': props.link.getID(),
strokeOpacity: 0, // props.selected ? 0.1 : 0,
strokeWidth: 20,
fill: 'none',
onContextMenu,
onDragOver: (event: React.DragEvent<HTMLDivElement>) => {
setDragOver(true)
if (event.dataTransfer.types.indexOf(DiagramDrag.AllowDropOnLink) !== -1) {
if (allowAdd) {
onSelection(true)
event.preventDefault()
}
}
},
onDragLeave: (event: React.DragEvent<HTMLDivElement>) => {
setDragOver(false)
if (event.dataTransfer.types.indexOf(DiagramDrag.AllowDropOnLink) !== -1) {
if (allowAdd) {
onSelection(false)
}
}
},
onDrop: (event: React.DragEvent<HTMLDivElement>) => {
if (event.dataTransfer.types.indexOf(DiagramDrag.AllowDropOnLink) !== -1) {
if (allowAdd) {
const dropData: { id: string; identifier: string } = JSON.parse(
event.dataTransfer.getData(DiagramDrag.NodeDrag)
)
link.fireEvent({ node: dropData }, Event.DropLinkEvent)
}
}
}
})
return (
<g>
{link.getOptions().color !== prevColorRef.current && BeforePath}
{Bottom}
{Top}
{allowAdd && (
<>
<circle
fill={props.link.getOptions().selectedColor}
r={10}
cx={point.x}
pointerEvents={isDragOver ? 'none' : 'all'}
onMouseLeave={onMouseLeave}
onMouseEnter={onMouseEnter}
cy={point.y}
opacity={props.selected ? 1 : 0}
onClick={onClick}
/>
<line
stroke={Utils.getRealCSSColor(Color.WHITE)}
x1={point.x - 5}
y1={point.y}
x2={point.x + 5}
y2={point.y}
strokeWidth="1"
opacity={props.selected ? 1 : 0}
></line>
<line
stroke={Utils.getRealCSSColor(Color.WHITE)}
x1={point.x}
y1={point.y - 5}
x2={point.x}
y2={point.y + 5}
strokeWidth="1"
opacity={props.selected ? 1 : 0}
></line>
</>
)}
</g>
)
}
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