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| // @flow
/*
Copyright(c) 2018 Uber Technologies, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import * as d3 from 'd3';
import * as React from 'react';
// This works in Typescript but causes an import loop for Flowtype. We'll just use `any` below.
// import { type LayoutEngine } from '../utilities/layout-engine/layout-engine-config';
import Edge from './edge';
import GraphUtils from './graph-util';
import NodeText from './node-text';
export type INode = {
title: string;
x?: number | null;
y?: number | null;
type?: string;
subtype?: string | null;
[key: string]: any;
};
type INodeProps = {
data: INode;
index: number;
id: string;
nodeTypes: any; // TODO: make a nodeTypes interface
nodeSubtypes: any; // TODO: make a nodeSubtypes interface
opacity?: number;
nodeKey: string;
nodeSize?: number;
onNodeMouseEnter: (event: any, data: any, hovered: boolean) => void;
onNodeMouseLeave: (event: any, data: any) => void;
onNodeMove: (point: IPoint, index: number, shiftKey: boolean) => void;
onNodeSelected: (data: any, index: number, shiftKey: boolean) => void;
onNodeUpdate: (point: IPoint, index: number, shiftKey: boolean) => void;
renderNode?: (
nodeRef: any,
data: any,
index: number,
selected: boolean,
hovered: boolean
) => any;
renderNodeText?: (data: any, index: number, id: string | number, isSelected: boolean) => any;
isSelected: boolean;
layoutEngine?: any;
};
type INodeState = {
hovered: boolean;
x: number;
y: number;
selected: boolean;
mouseDown: boolean;
};
export type IPoint = {
x: number;
y: number;
};
class Node extends React.Component<INodeProps, INodeState> {
static defaultProps = {
isSelected: false,
nodeSize: 154,
onNodeMouseEnter: () => { return; },
onNodeMouseLeave: () => { return; },
onNodeMove: () => { return; },
onNodeSelected: () => { return; },
onNodeUpdate: () => { return; }
};
static getDerivedStateFromProps(nextProps: INodeProps, prevState: INodeState) {
return {
selected: nextProps.isSelected,
x: nextProps.data.x || 0,
y: nextProps.data.y || 0
};
}
nodeRef: any;
oldSibling: any;
constructor(props: INodeProps) {
super(props);
this.state = {
hovered: false,
mouseDown: false,
selected: false,
x: props.data.x || 0,
y: props.data.y || 0
};
this.nodeRef = React.createRef();
}
componentDidMount() {
const dragFunction = d3
.drag()
.on('drag', this.handleMouseMove)
.on('start', this.handleDragStart)
.on('end', this.handleDragEnd);
d3
.select(this.nodeRef.current)
.on('mouseout', this.handleMouseOut)
.call(dragFunction);
}
handleMouseMove = () => {
const mouseButtonDown = d3.event.sourceEvent.buttons === 1;
const shiftKey = d3.event.sourceEvent.shiftKey;
const { nodeSize, layoutEngine, nodeKey } = this.props;
if (!mouseButtonDown) {
return;
}
// While the mouse is down, this function handles all mouse movement
const newState = {
x: d3.event.x,
y: d3.event.y
};
if (shiftKey) {
// draw edge
// undo the target offset subtraction done by Edge
const off = Edge.calculateOffset(nodeSize, this.props.data, newState, nodeKey);
newState.x += off.xOff;
newState.y += off.yOff;
// now tell the graph that we're actually drawing an edge
} else {
// move node
if (layoutEngine) {
Object.assign(newState, layoutEngine.getPositionForNode(newState));
}
this.setState(newState);
}
this.props.onNodeMove(newState, this.props.index, shiftKey);
}
handleDragStart = () => {
Iif (!this.nodeRef.current) {
return;
}
if (!this.oldSibling) {
this.oldSibling = this.nodeRef.current.parentElement.nextSibling;
}
// Moves child to the end of the element stack to re-arrange the z-index
this.nodeRef.current.parentElement.parentElement.appendChild(this.nodeRef.current.parentElement);
}
handleDragEnd = () => {
Iif (!this.nodeRef.current) {
return;
}
if (this.oldSibling && this.oldSibling.parentElement) {
this.oldSibling.parentElement.insertBefore(this.nodeRef.current.parentElement, this.oldSibling);
}
this.setState({ mouseDown: false });
const { x, y } = this.state;
const { data, index } = this.props;
const shiftKey = d3.event.sourceEvent.shiftKey;
this.props.onNodeUpdate(
{
x,
y
},
index,
shiftKey
);
this.props.onNodeSelected(data, index, shiftKey);
}
handleMouseOver = (event: any) => {
// Detect if mouse is already down and do nothing.
let hovered = false;
if ((d3.event && d3.event.buttons !== 1) || (event && event.buttons !== 1)) {
hovered = true;
this.setState({ hovered });
}
this.props.onNodeMouseEnter(event, this.props.data, hovered);
}
handleMouseOut = (event: any) => {
// Detect if mouse is already down and do nothing. Sometimes the system lags on
// drag and we don't want the mouseOut to fire while the user is moving the
// node around
this.setState({ hovered: false });
this.props.onNodeMouseLeave(event, this.props.data);
}
static getNodeTypeXlinkHref(data: INode, nodeTypes: any) {
if (data.type && nodeTypes[data.type]) {
return nodeTypes[data.type].shapeId;
} else if (nodeTypes.emptyNode) {
return nodeTypes.emptyNode.shapeId;
}
return null;
}
static getNodeSubtypeXlinkHref(data: INode, nodeSubtypes?: any) {
if (data.subtype && nodeSubtypes && nodeSubtypes[data.subtype]) {
return nodeSubtypes[data.subtype].shapeId;
} else if (nodeSubtypes && nodeSubtypes.emptyNode) {
return nodeSubtypes.emptyNode.shapeId;
}
return null;
}
renderShape() {
const { renderNode, data, index, nodeTypes, nodeSubtypes } = this.props;
const { hovered, selected } = this.state;
const props = {
height: this.props.nodeSize || 0,
width: this.props.nodeSize || 0
};
const nodeShapeContainerClassName = GraphUtils.classNames('shape');
const nodeClassName = GraphUtils.classNames('node', { selected, hovered });
const nodeSubtypeClassName = GraphUtils.classNames('subtype-shape', { selected: this.state.selected });
const nodeTypeXlinkHref = Node.getNodeTypeXlinkHref(data, nodeTypes) || '';
const nodeSubtypeXlinkHref = Node.getNodeSubtypeXlinkHref(data, nodeSubtypes) || '';
// get width and height defined on def element
const defSvgNodeElement: any = nodeTypeXlinkHref ? document.querySelector(`defs>${nodeTypeXlinkHref}`) : null;
const nodeWidthAttr = defSvgNodeElement ? defSvgNodeElement.getAttribute('width') : 0;
const nodeHeightAttr = defSvgNodeElement ? defSvgNodeElement.getAttribute('height') : 0;
props.width = nodeWidthAttr ? parseInt(nodeWidthAttr, 10) : props.width;
props.height = nodeHeightAttr ? parseInt(nodeHeightAttr, 10) : props.height;
if (renderNode) {
// Originally: graphView, domNode, datum, index, elements.
return renderNode(this.nodeRef, data, index, selected, hovered);
} else {
return (
<g className={nodeShapeContainerClassName} {...props}>
{!!data.subtype && (
<use
data-index={index}
className={nodeSubtypeClassName}
x={-props.width / 2}
y={-props.height / 2}
width={props.width}
height={props.height}
xlinkHref={nodeSubtypeXlinkHref}
/>
)}
<use
data-index={index}
className={nodeClassName}
x={-props.width / 2}
y={-props.height / 2}
width={props.width}
height={props.height}
xlinkHref={nodeTypeXlinkHref}
/>
</g>
);
}
}
renderText() {
const { data, index, id, nodeTypes, renderNodeText, isSelected } = this.props;
if (renderNodeText) {
return renderNodeText(data, index, id, isSelected);
}
return (<NodeText data={data} nodeTypes={nodeTypes} isSelected={this.state.selected} />);
}
render() {
const { x, y } = this.state;
const { opacity, id, data } = this.props;
const className = GraphUtils.classNames('node', data.type, {
hovered: this.state.hovered,
selected: this.state.selected
});
return (
<g
className={className}
onMouseOver={this.handleMouseOver}
onMouseOut={this.handleMouseOut}
id={id}
ref={this.nodeRef}
opacity={opacity}
transform={`translate(${x}, ${y})`}
>
{this.renderShape()}
{this.renderText()}
</g>
);
}
}
export default Node;
|