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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';
import ReactDOM from 'react-dom';
import '../styles/main.scss';
import { LayoutEngines } from '../utilities/layout-engine/layout-engine-config';
import { type LayoutEngineType } from '../utilities/layout-engine/layout-engine-types';
import { type IGraphViewProps } from './graph-view-props';
import Background from './background';
import Defs from './defs';
import Edge, { type IEdge, type ITargetPosition } from './edge';
import GraphControls from './graph-controls';
import GraphUtils, { type INodeMapNode } from './graph-util';
import Node, { type INode } from './node';
import { Transform } from 'stream';
type IViewTransform = {
k: number,
x: number,
y: number
}
type IGraphViewState = {
viewTransform?: IViewTransform;
hoveredNode: boolean;
nodesMap: any;
edgesMap: any;
nodes: any[];
edges: any[];
selectingNode: boolean;
hoveredNodeData: INode | null;
edgeEndNode: INode | null;
draggingEdge: boolean;
draggedEdge: any;
componentUpToDate: boolean;
selectedEdgeObj: any;
selectedNodeObj: any;
documentClicked: boolean;
svgClicked: boolean;
focused: boolean;
};
class GraphView extends React.Component<IGraphViewProps, IGraphViewState> {
static defaultProps = {
canCreateEdge: (startNode?:INode, endNode?:INode) => true,
canDeleteEdge: () => true,
canDeleteNode: () => true,
edgeArrowSize: 8,
gridSpacing: 36,
layoutEngineType: 'None',
maxTitleChars: 9,
maxZoom: 1.5,
minZoom: 0.15,
nodeSize: 154,
readOnly: false,
showGraphControls: true,
zoomDelay: 1000,
zoomDur: 750
};
static getDerivedStateFromProps(nextProps: IGraphViewProps, prevState: IGraphViewState) {
const { edges, nodeKey } = nextProps;
let nodes = nextProps.nodes;
const nodesMap = GraphUtils.getNodesMap(nodes, nodeKey);
const edgesMap = GraphUtils.getEdgesMap(edges);
GraphUtils.linkNodesAndEdges(nodesMap, edges);
const selectedNodeMap =
nextProps.selected && nodesMap[`key-${nextProps.selected[nodeKey]}`]
? nodesMap[`key-${nextProps.selected[nodeKey]}`]
: null;
const selectedEdgeMap =
nextProps.selected && edgesMap[`${nextProps.selected.source}_${nextProps.selected.target}`]
? edgesMap[`${nextProps.selected.source}_${nextProps.selected.target}`]
: null;
// Handle layoutEngine on initial render
Eif (prevState.nodes.length === 0 && nextProps.layoutEngineType && LayoutEngines[nextProps.layoutEngineType]) {
const layoutEngine = new LayoutEngines[nextProps.layoutEngineType](nextProps);
const newNodes = layoutEngine.adjustNodes(nodes, nodesMap);
nodes = newNodes;
}
const nextState = {
componentUpToDate: true,
edges,
edgesMap,
nodes,
nodesMap,
readOnly: nextProps.readOnly,
selectedEdgeObj: {
edge: selectedEdgeMap ? edges[selectedEdgeMap.originalArrIndex] : null
},
selectedNodeObj: {
index: selectedNodeMap ? selectedNodeMap.originalArrIndex : -1,
node: selectedNodeMap ? nodes[selectedNodeMap.originalArrIndex] : null
},
selectionChanged: false
};
return nextState;
}
nodeTimeouts: any;
edgeTimeouts: any;
renderNodesTimeout: any;
renderEdgesTimeout: any;
zoom: any;
viewWrapper: any;
entities: any;
selectedView: any;
view: any;
graphControls: any;
layoutEngine: any;
constructor(props: IGraphViewProps) {
super(props);
this.nodeTimeouts = {};
this.edgeTimeouts = {};
this.renderNodesTimeout = null;
this.renderEdgesTimeout = null;
this.graphControls = React.createRef();
Eif (props.layoutEngineType) {
this.layoutEngine = new LayoutEngines[props.layoutEngineType](props);
}
this.state = {
componentUpToDate: false,
draggedEdge: null,
draggingEdge: false,
edgeEndNode: null,
edges: [],
edgesMap: {},
hoveredNode: false,
hoveredNodeData: null,
nodes: [],
nodesMap: {},
selectedEdgeObj: null,
selectedNodeObj: null,
selectingNode: false,
documentClicked: false,
svgClicked: false,
focused: true
};
}
componentDidMount() {
// TODO: can we target the element rather than the document?
document.addEventListener('keydown', this.handleWrapperKeydown);
document.addEventListener('click', this.handleDocumentClick);
this.zoom = d3
.zoom()
.filter(this.zoomFilter)
.scaleExtent([this.props.minZoom || 0, this.props.maxZoom || 0])
.on('start', this.handleZoomStart)
.on('zoom', this.handleZoom)
.on('end', this.handleZoomEnd);
d3
.select(this.viewWrapper)
.on('touchstart', this.containZoom)
.on('touchmove', this.containZoom)
.on('click', this.handleSvgClicked) // handle element click in the element components
.select('svg')
.call(this.zoom);
this.selectedView = d3.select(this.view);
// On the initial load, the 'view' <g> doesn't exist until componentDidMount.
// Manually render the first view.
this.renderView();
setTimeout(() => {
if (this.viewWrapper != null) {
this.handleZoomToFit();
}
}, this.props.zoomDelay);
}
componentWillUnmount() {
document.removeEventListener('keydown', this.handleWrapperKeydown);
}
shouldComponentUpdate(nextProps: IGraphViewProps, nextState: IGraphViewState) {
if (
nextProps.nodes !== this.props.nodes ||
nextProps.edges !== this.props.edges ||
!nextState.componentUpToDate ||
nextProps.selected !== this.props.selected ||
nextProps.readOnly !== this.props.readOnly ||
nextProps.layoutEngineType !== this.props.layoutEngineType
) {
return true;
}
return false;
}
componentDidUpdate(prevProps: IGraphViewProps, prevState: IGraphViewState) {
const { nodesMap, edgesMap, nodes } = this.state;
Eif (this.props.layoutEngineType && LayoutEngines[this.props.layoutEngineType]) {
this.layoutEngine = new LayoutEngines[this.props.layoutEngineType](this.props);
const newNodes = this.layoutEngine.adjustNodes(nodes, nodesMap);
this.setState({
nodes: newNodes
});
}
// Note: the order is intentional Do not save the timeouts to variables, as
// subsequent render calls could overwrite timeouts and not render new additions
// or deletions.
setTimeout(() => {
this.addNewNodes(this.state.nodes, prevState.nodesMap);
});
// add new edges
setTimeout(() => {
this.addNewEdges(this.state.edges, prevState.edgesMap);
});
// remove old edges
setTimeout(() => {
this.removeOldEdges(prevState.edges, edgesMap);
});
// remove old nodes
setTimeout(() => {
this.removeOldNodes(prevState.nodesMap, nodesMap);
});
this.setState({
componentUpToDate: true
});
}
getNodeById(id: string | null): INodeMapNode | null {
return this.state.nodesMap ? this.state.nodesMap[`key-${id || ''}`] : null;
}
getEdgeBySourceTarget(source: string, target: string): IEdge | null {
return this.state.edgesMap ? this.state.edgesMap[`${source}_${target}`] : null;
}
deleteNodeById(id: string) {
if (this.state.nodesMap && this.state.nodesMap[`key-${id}`]) {
delete this.state.nodesMap[`key-${id}`];
}
}
deleteEdgeBySourceTarget(source: string, target: string) {
if (this.state.edgesMap && this.state.edgesMap[`${source}_${target}`]) {
delete this.state.edgesMap[`${source}_${target}`];
}
}
addNewNodes(nodes: INode[], oldNodesMap: any) {
if (this.state.draggingEdge) {
return;
}
const nodeKey = this.props.nodeKey;
nodes.forEach((node, i) => {
const prevNode = oldNodesMap[`key-${node[nodeKey]}`];
if (prevNode && node !== prevNode.node) {
// Nodes must be immutable. A node with the same key must not have the same memory reference.
// Update individual node
this.asyncRenderNode(node, i);
} else {
// New node
this.asyncRenderNode(node, i);
}
});
}
removeOldNodes(prevNodeMap: any, nodesMap: any) {
const nodeKey = this.props.nodeKey;
// remove old nodes
Object.keys(prevNodeMap).forEach((nodeId) => {
// Check for deletions
if (!nodesMap[nodeId]) {
// remove all outgoing edges
prevNodeMap[nodeId].outgoingEdges.forEach((edge) => {
this.removeEdgeElement(edge.source, edge.target);
});
// remove all incoming edges
prevNodeMap[nodeId].incomingEdges.forEach((edge) => {
this.removeEdgeElement(edge.source, edge.target);
});
// remove node
const id = prevNodeMap[nodeId].node[nodeKey];
GraphUtils.removeElementFromDom(`node-${id}-container`);
}
});
}
addNewEdges(edges: IEdge[], oldEdgesMap: any) {
if (!this.state.draggingEdge) {
edges.forEach((edge) => {
if (!edge.source || !edge.target) {
return;
}
const prevEdge = oldEdgesMap[`${edge.source}_${edge.target}`];
if (!prevEdge) {
// new edge
this.asyncRenderEdge(edge);
}
});
}
}
removeOldEdges = (prevEdges: IEdge[], edgesMap: any) => {
// remove old edges
prevEdges.forEach((edge) => {
// Check for deletions
if (!edge.source || !edge.target) {
return;
}
if (!edgesMap[`${edge.source}_${edge.target}`]) {
// remove edge
this.removeEdgeElement(edge.source, edge.target);
}
});
}
removeEdgeElement(source: string, target: string) {
const id = `${source}-${target}`;
GraphUtils.removeElementFromDom(`edge-${id}-container`);
}
canSwap(sourceNode: INode, hoveredNode: INode | null, swapEdge: any) {
return (
hoveredNode &&
sourceNode !== hoveredNode &&
(swapEdge.source !== sourceNode[this.props.nodeKey] ||
swapEdge.target !== hoveredNode[this.props.nodeKey])
);
}
deleteNode(selectedNode: INode) {
const { nodeKey } = this.props;
const { nodes } = this.state;
const nodeId = selectedNode[nodeKey];
const originalArrIndex = (this.getNodeById(nodeId): any).originalArrIndex;
// delete from local state
this.deleteNodeById(nodeId);
nodes.splice(originalArrIndex, 1);
this.setState({
componentUpToDate: false,
hoveredNode: false,
nodes
});
// remove from UI
GraphUtils.removeElementFromDom(`node-${nodeId}-container`);
// inform consumer
this.props.onSelectNode(null);
this.props.onDeleteNode(selectedNode, originalArrIndex, nodes);
}
deleteEdge(selectedEdge: IEdge) {
const { edges } = this.state;
if (!selectedEdge.source || !selectedEdge.target) {
return;
}
const originalArrIndex = (this.getEdgeBySourceTarget(selectedEdge.source, selectedEdge.target): any).originalArrIndex;
edges.splice(originalArrIndex, 1);
if (selectedEdge.source && selectedEdge.target) {
this.deleteEdgeBySourceTarget(selectedEdge.source, selectedEdge.target);
}
this.setState({
componentUpToDate: false,
edges
});
// remove from UI
if (selectedEdge.source && selectedEdge.target) {
GraphUtils.removeElementFromDom(`edge-${selectedEdge.source}-${selectedEdge.target}-container`);
}
// inform consumer
this.props.onDeleteEdge(selectedEdge, originalArrIndex, edges);
}
handleDelete = (selected: IEdge | INode) => {
const { canDeleteNode, canDeleteEdge, readOnly } = this.props;
if (readOnly || !selected) { return; }
if (!selected.source && canDeleteNode && canDeleteNode(selected)) {
// node
// $FlowFixMe
this.deleteNode(selected);
} else if (selected.source && canDeleteEdge && canDeleteEdge(selected)) {
// edge
// $FlowFixMe
this.deleteEdge(selected);
}
}
handleWrapperKeydown: KeyboardEventListener = (d) => {
// Conditionally ignore keypress events on the window
if (!this.state.focused) {
return;
}
switch (d.key) {
case 'Delete':
case 'Backspace':
if (this.state.selectedNodeObj) {
this.handleDelete(this.state.selectedNodeObj.node || this.props.selected);
}
break;
case 'z':
if ((d.metaKey || d.ctrlKey) && this.props.onUndo) {
this.props.onUndo();
}
break;
case 'c':
if ((d.metaKey || d.ctrlKey) && this.state.selectedNodeObj.node && this.props.onCopySelected) {
this.props.onCopySelected();
}
break;
case 'v':
if ((d.metaKey || d.ctrlKey) && this.state.selectedNodeObj.node && this.props.onPasteSelected) {
this.props.onPasteSelected();
}
break;
default:
break;
}
}
handleEdgeSelected = (e) => {
const { source, target } = e.target.dataset;
let newState = {
svgClicked: true
};
if (source && target) {
const edge: IEdge | null = this.getEdgeBySourceTarget(source, target);
if (!edge) {
return;
}
const originalArrIndex = (this.getEdgeBySourceTarget(source, target): any).originalArrIndex;
const previousSelection = (this.state.selectedEdgeObj && this.state.selectedEdgeObj.edge) || null;
newState = {
...newState,
selectedEdgeObj: {
componentUpToDate: false,
edge: this.state.edges[originalArrIndex]
}
}
this.setState(newState);
this.syncRenderEdge(this.state.edges[originalArrIndex]);
if (previousSelection) {
this.syncRenderEdge(previousSelection);
}
this.props.onSelectEdge(this.state.edges[originalArrIndex]);
} else {
this.setState(newState);
}
}
handleSvgClicked = (d: any, i: any) => {
if (this.isPartOfEdge(d3.event.target)) {
this.handleEdgeSelected(d3.event);
return; // If any part of the edge is clicked, return
}
if (this.state.selectingNode) {
this.setState({
selectingNode: false,
svgClicked: true
});
} else {
const previousSelection = (this.state.selectedNodeObj && this.state.selectedNodeObj.node) || null;
const previousSelectionIndex = (this.state.selectedNodeObj && this.state.selectedNodeObj.index) || -1;
// de-select the current selection
this.setState({
selectedNodeObj: null,
focused: true,
svgClicked: true
});
this.props.onSelectNode(null);
if (previousSelection) {
this.syncRenderNode(previousSelection, previousSelectionIndex);
}
if (!this.props.readOnly && d3.event.shiftKey) {
const xycoords = d3.mouse(d3.event.target);
this.props.onCreateNode(xycoords[0], xycoords[1]);
}
}
}
handleDocumentClick = () => {
this.setState({
documentClicked: true,
focused: this.state.svgClicked,
svgClicked: false
});
}
isPartOfEdge(element) {
return !!GraphUtils.findParent(element, '.edge-container');
}
handleNodeMove = (position: any, index: number, shiftKey: boolean) => {
const node = this.state.nodes[index];
const { nodeKey, canCreateEdge, readOnly } = this.props;
if (readOnly) {
return;
}
if (!shiftKey) {
node.x = position.x;
node.y = position.y;
// Update edges synchronously because async doesn't update fast enough
const nodeMapNode: INodeMapNode | null = this.getNodeById(node[nodeKey]);
if (!nodeMapNode) {
return;
}
this.syncRenderConnectedEdgesFromNode(nodeMapNode, true);
} else if (canCreateEdge && canCreateEdge(node[nodeKey])) {
// render new edge
this.syncRenderEdge({ source: node[nodeKey], targetPosition: position });
this.setState({ draggingEdge: true });
}
}
createNewEdge() {
const { canCreateEdge, nodeKey, onCreateEdge } = this.props;
const { edgesMap, edgeEndNode, hoveredNodeData } = this.state;
if (!hoveredNodeData) {
return;
}
GraphUtils.removeElementFromDom('edge-custom-container');
if (edgeEndNode) {
const mapId1 = `${hoveredNodeData[nodeKey]}_${edgeEndNode[nodeKey]}`;
const mapId2 = `${edgeEndNode[nodeKey]}_${hoveredNodeData[nodeKey]}`;
if (
edgesMap &&
hoveredNodeData !== edgeEndNode &&
canCreateEdge &&
canCreateEdge(hoveredNodeData, edgeEndNode) &&
!edgesMap[mapId1] &&
!edgesMap[mapId2]
) {
const edge: IEdge = {
source: hoveredNodeData[nodeKey],
target: edgeEndNode[nodeKey]
};
this.setState({
componentUpToDate: false,
draggedEdge: null,
draggingEdge: false,
});
// this syncRenderEdge will render the edge as un-selected.
this.syncRenderEdge(edge);
// we expect the parent website to set the selected property to the new edge when it's created
onCreateEdge(hoveredNodeData, edgeEndNode);
} else {
// make the system understand that the edge creation process is done even though it didn't work.
this.setState({
edgeEndNode: null,
draggingEdge: false,
});
}
}
}
handleNodeUpdate = (position: any, index: number, shiftKey: boolean) => {
const { onUpdateNode } = this.props;
const { nodes } = this.state;
// Detect if edge is being drawn and link to hovered node
// This will handle a new edge
if (shiftKey) {
this.createNewEdge();
} else {
const node = nodes[index];
if (node) {
Object.assign(node, position);
onUpdateNode(node);
}
}
// force a re-render
this.setState({
componentUpToDate: false,
// Setting hoveredNode to false here because the layout engine doesn't
// fire the mouseLeave event when nodes are moved.
hoveredNode: false
});
}
handleNodeMouseEnter = (event: any, data: any, hovered: boolean) => {
// hovered is false when creating edges
if (hovered && !this.state.hoveredNode) {
this.setState({
hoveredNode: true,
hoveredNodeData: data
});
} else if (!hovered && this.state.hoveredNode && this.state.draggingEdge) {
this.setState({
edgeEndNode: data
});
} else {
this.setState({
hoveredNode: true,
hoveredNodeData: data
});
}
}
handleNodeMouseLeave = (event: any, data: any) => {
if (
(d3.event && d3.event.toElement && GraphUtils.findParent(d3.event.toElement, '.node')) ||
(event && event.relatedTarget && GraphUtils.findParent(event.relatedTarget, '.node')) ||
(d3.event && d3.event.buttons === 1) ||
(event && event.buttons === 1)
) {
// still within a node
return;
}
if (event && event.relatedTarget) {
if (event.relatedTarget.classList.contains('edge-overlay-path')) {
return;
}
this.setState({ hoveredNode: false, edgeEndNode: null });
}
}
handleNodeSelected = (node: INode, index: number, creatingEdge: boolean) => {
// if creatingEdge then de-select nodes and select new edge instead
const previousSelection = (this.state.selectedNodeObj && this.state.selectedNodeObj.node) || null;
const previousSelectionIndex = previousSelection ? this.state.selectedNodeObj.index : -1;
const newState = {
componentUpToDate: false,
selectedNodeObj: {
index,
node
}
};
this.setState(newState);
// render both previous selection and new selection
this.syncRenderNode(node, index);
if (previousSelection) {
this.syncRenderNode(previousSelection, previousSelectionIndex);
}
if (!creatingEdge) {
this.props.onSelectNode(node);
}
}
// One can't attach handlers to 'markers' or obtain them from the event.target
// If the click occurs within a certain radius of edge target, assume the click
// occurred on the arrow
isArrowClicked(edge: IEdge | null) {
const { nodeSize, edgeArrowSize } = this.props;
const eventTarget = d3.event.sourceEvent.target;
const arrowSize = edgeArrowSize || 0;
if (!edge || eventTarget.tagName !== 'path') {
return false; // If the handle is clicked
}
const xycoords = d3.mouse(eventTarget);
if (!edge.target) {
return false;
}
const targetNodeMapNode = this.getNodeById(edge.target);
const source = {
x: xycoords[0],
y: xycoords[1]
};
const edgeCoords = Edge.parsePathToXY(Edge.getEdgePathElement(edge));
// the arrow is clicked if the xycoords are within edgeArrowSize of edgeCoords.target[x,y]
return (
source.x < edgeCoords.target.x + arrowSize &&
source.x > edgeCoords.target.x - arrowSize &&
source.y < edgeCoords.target.y + arrowSize &&
source.y > edgeCoords.target.y - arrowSize
);
}
zoomFilter() {
if (d3.event.button || d3.event.ctrlKey) {
return false;
}
return true;
}
// Keeps 'zoom' contained
containZoom() {
const stop = d3.event.button || d3.event.ctrlKey;
if (stop) {
d3.event.stopImmediatePropagation(); // stop zoom
}
d3.event.preventDefault();
}
handleZoomStart = () => {
// Zoom start events also handle edge clicks. We need to determine if an edge
// was clicked and deal with that scenario.
const sourceEvent = d3.event.sourceEvent;
if (
// graph can't be modified
this.props.readOnly ||
// no sourceEvent, not an action on an element
!sourceEvent ||
// not a click event
(sourceEvent && !sourceEvent.buttons) ||
// not an edge click area
(sourceEvent && !sourceEvent.target.classList.contains('edge-overlay-path'))
) {
return false;
}
// Clicked on the edge.
const { target } = sourceEvent;
const edgeId = target.id;
const edge = this.state.edgesMap && this.state.edgesMap[edgeId] ? this.state.edgesMap[edgeId].edge : null;
// Only move edges if the arrow is dragged
Iif (!this.isArrowClicked(edge) || !edge) {
return false;
}
this.removeEdgeElement(edge.source, edge.target);
this.setState({ draggingEdge: true, draggedEdge: edge });
this.dragEdge(edge);
}
getMouseCoordinates() {
let mouseCoordinates = [0, 0];
Eif (this.selectedView) {
mouseCoordinates = d3.mouse(this.selectedView.node());
}
return mouseCoordinates;
}
dragEdge(draggedEdge?: IEdge) {
const { nodeSize, nodeKey } = this.props;
draggedEdge = draggedEdge || this.state.draggedEdge;
if (!draggedEdge) {
return;
}
const mouseCoordinates = this.getMouseCoordinates();
const targetPosition = {
x: mouseCoordinates[0],
y: mouseCoordinates[1]
};
const off = Edge.calculateOffset(nodeSize, (this.getNodeById(draggedEdge.source): any).node, targetPosition, nodeKey);
targetPosition.x += off.xOff;
targetPosition.y += off.yOff;
this.syncRenderEdge({ source: draggedEdge.source, targetPosition });
this.setState({
draggedEdge,
draggingEdge: true
});
}
// View 'zoom' handler
handleZoom = () => {
const { draggingEdge, draggedEdge, hoveredNode } = this.state;
const transform: IViewTransform = d3.event.transform;
if (!draggingEdge) {
d3.select(this.view).attr('transform', transform);
// prevent re-rendering on zoom
if (this.state.viewTransform !== transform) {
this.setState({
viewTransform: transform,
draggedEdge: null,
draggingEdge: false
}, () => {
// force the child components which are related to zoom level to update
this.renderGraphControls();
});
}
} else Eif (draggingEdge) {
this.dragEdge();
return false;
}
}
handleZoomEnd = () => {
const { draggingEdge, draggedEdge, edgeEndNode, edgesMap } = this.state;
const { nodeKey } = this.props;
if (!draggingEdge || !draggedEdge) {
if (draggingEdge && !draggedEdge) {
// This is a bad case, sometimes when the graph loses focus while an edge
// is being created it doesn't set draggingEdge to false. This fixes that case.
this.setState({
draggingEdge: false
});
}
return;
}
// Zoom start events also handle edge clicks. We need to determine if an edge
// was clicked and deal with that scenario.
const draggedEdgeCopy = { ...this.state.draggedEdge };
// remove custom edge
GraphUtils.removeElementFromDom('edge-custom-container');
this.setState(
{
draggedEdge: null,
draggingEdge: false,
hoveredNode: false
},
() => {
// handle creating or swapping edges
const sourceNodeById = this.getNodeById(draggedEdge.source);
const targetNodeById = this.getNodeById(draggedEdge.target);
Iif (!sourceNodeById || !targetNodeById) {
return;
}
const sourceNode = sourceNodeById.node;
Eif (
edgeEndNode &&
!this.getEdgeBySourceTarget(draggedEdge.source, edgeEndNode[nodeKey]) &&
this.canSwap(sourceNode, edgeEndNode, draggedEdge)
) {
// determine the target node and update the edge
draggedEdgeCopy.target = edgeEndNode[nodeKey];
this.syncRenderEdge(draggedEdgeCopy);
this.props.onSwapEdge(
sourceNodeById.node,
edgeEndNode,
draggedEdge
);
} else {
// this resets the dragged edge back to its original position.
this.syncRenderEdge(draggedEdge);
}
}
);
}
// Zooms to contents of this.refs.entities
handleZoomToFit = () => {
const parent = d3.select(this.viewWrapper).node();
const entities = d3.select(this.entities).node();
const viewBBox = entities.getBBox ? entities.getBBox() : null;
Iif (!viewBBox) { return; }
const width = parent.clientWidth;
const height = parent.clientHeight;
const minZoom = this.props.minZoom || 0;
const maxZoom = this.props.maxZoom || 2;
const next = {
k: (minZoom + maxZoom) / 2,
x: 0,
y: 0,
};
if (viewBBox.width > 0 && viewBBox.height > 0) {
// There are entities
const dx = viewBBox.width;
const dy = viewBBox.height;
const x = viewBBox.x + viewBBox.width / 2;
const y = viewBBox.y + viewBBox.height / 2;
next.k = 0.9 / Math.max(dx / width, dy / height);
if (next.k < minZoom) {
next.k = minZoom;
} else if (next.k > maxZoom) {
next.k = maxZoom;
}
next.x = width / 2 - next.k * x;
next.y = height / 2 - next.k * y;
}
this.setZoom(next.k, next.x, next.y, this.props.zoomDur);
}
// Updates current viewTransform with some delta
modifyZoom = (modK: number = 0, modX: number = 0, modY: number = 0, dur: number = 0) => {
const parent = d3.select(this.viewWrapper).node();
const center = {
x: parent.clientWidth / 2,
y: parent.clientHeight / 2
};
const extent = this.zoom.scaleExtent();
const viewTransform: any = this.state.viewTransform;
const next = {
k: viewTransform.k,
x: viewTransform.x,
y: viewTransform.y
};
const targetZoom = next.k * (1 + modK);
next.k = targetZoom;
if (targetZoom < extent[0] || targetZoom > extent[1]) {
return false;
}
const translate0 = {
x: (center.x - next.x) / next.k,
y: (center.y - next.y) / next.k
};
const l = {
x: translate0.x * next.k + next.x,
y: translate0.y * next.k + next.y
};
next.x += center.x - l.x + modX;
next.y += center.y - l.y + modY;
this.setZoom(next.k, next.x, next.y, dur);
return true;
}
// Programmatically resets zoom
setZoom(k: number = 1, x: number = 0, y: number = 0, dur: number = 0) {
const t = d3.zoomIdentity.translate(x, y).scale(k);
d3
.select(this.viewWrapper)
.select('svg')
.transition()
.duration(dur)
.call(this.zoom.transform, t);
}
// Renders 'graph' into view element
renderView() {
// Update the view w/ new zoom/pan
this.selectedView.attr('transform', this.state.viewTransform);
clearTimeout(this.renderNodesTimeout);
this.renderNodesTimeout = setTimeout(this.renderNodes);
}
renderBackground = () => {
const { gridSize, backgroundFillId, renderBackground } = this.props;
if (renderBackground) {
return renderBackground(gridSize);
} else {
return <Background gridSize={gridSize} backgroundFillId={backgroundFillId} />;
}
}
getNodeComponent = (id: string, node: INode, index: number) => {
const { nodeTypes, nodeSubtypes, nodeSize, renderNode, renderNodeText, nodeKey } = this.props;
return (
<Node
key={id}
id={id}
data={node}
index={index}
nodeTypes={nodeTypes}
nodeSize={nodeSize}
nodeKey={nodeKey}
nodeSubtypes={nodeSubtypes}
onNodeMouseEnter={this.handleNodeMouseEnter}
onNodeMouseLeave={this.handleNodeMouseLeave}
onNodeMove={this.handleNodeMove}
onNodeUpdate={this.handleNodeUpdate}
onNodeSelected={this.handleNodeSelected}
renderNode={renderNode}
renderNodeText={renderNodeText}
isSelected={this.state.selectedNodeObj.node === node}
layoutEngine={this.layoutEngine}
/>
);
}
renderNode(id: string, element: Element) {
const containerId = `${id}-container`;
let nodeContainer: HTMLElement | Element | null = document.getElementById(containerId);
if (!nodeContainer) {
nodeContainer = document.createElementNS('http://www.w3.org/2000/svg', 'g');
nodeContainer.id = containerId;
this.entities.appendChild(nodeContainer);
}
// ReactDOM.render replaces the insides of an element This renders the element
// into the nodeContainer
const anyElement: any = element;
ReactDOM.render(anyElement, nodeContainer);
}
syncRenderConnectedEdgesFromNode(node: INodeMapNode, nodeMoving: boolean = false) {
if (this.state.draggingEdge) {
return;
}
node.incomingEdges.forEach((edge) => {
this.syncRenderEdge(edge, nodeMoving);
});
node.outgoingEdges.forEach((edge) => {
this.syncRenderEdge(edge, nodeMoving);
});
}
asyncRenderNode(node: INode, i: number) {
const nodeKey = this.props.nodeKey;
const timeoutId = `nodes-${node[nodeKey]}`;
clearTimeout(this.nodeTimeouts[timeoutId]);
this.nodeTimeouts[timeoutId] = setTimeout(() => {
this.syncRenderNode(node, i);
});
}
syncRenderNode(node: INode, i: number) {
const nodeKey = this.props.nodeKey;
const id = `node-${node[nodeKey]}`;
const element: any = this.getNodeComponent(id, node, i);
const nodesMapNode = this.getNodeById(node[nodeKey]);
this.renderNode(id, element);
Eif (nodesMapNode) {
this.syncRenderConnectedEdgesFromNode(nodesMapNode);
}
}
renderNodes = () => {
if (!this.entities) {
return;
}
this.state.nodes.forEach((node, i) => {
this.asyncRenderNode(node, i);
});
}
isEdgeSelected = (edge: IEdge) => {
return !!this.state.selectedEdgeObj &&
!!this.state.selectedEdgeObj.edge &&
this.state.selectedEdgeObj.edge.source === edge.source &&
this.state.selectedEdgeObj.edge.target === edge.target;
}
getEdgeComponent = (edge: IEdge | any) => {
const sourceNodeMapNode = this.getNodeById(edge.source);
const sourceNode = sourceNodeMapNode ? this.state.nodes[sourceNodeMapNode.originalArrIndex] : null;
const targetNodeMapNode = this.getNodeById(edge.target);
const targetNode = targetNodeMapNode ? this.state.nodes[targetNodeMapNode.originalArrIndex] : null;
const targetPosition = edge.targetPosition;
const { edgeTypes, edgeHandleSize, nodeSize, nodeKey} = this.props;
return (
<Edge
data={edge}
edgeTypes={edgeTypes}
edgeHandleSize={edgeHandleSize}
nodeSize={nodeSize}
sourceNode={sourceNode}
targetNode={targetNode || targetPosition}
nodeKey={nodeKey}
isSelected={this.isEdgeSelected(edge)}
/>
);
}
renderEdge = (id: string, element: any, edge: IEdge, nodeMoving: boolean = false) => {
let containerId = `${id}-container`;
const customContainerId = `${id}-custom-container`;
const { draggedEdge } = this.state;
const { afterRenderEdge } = this.props;
let edgeContainer = document.getElementById(containerId);
Iif (nodeMoving && edgeContainer) {
edgeContainer.style.display = 'none';
containerId = `${id}-custom-container`;
edgeContainer = document.getElementById(containerId);
} else if (edgeContainer) {
const customContainer = document.getElementById(customContainerId);
edgeContainer.style.display = '';
Eif (customContainer) {
customContainer.remove();
}
}
if (!edgeContainer && edge !== draggedEdge) {
const newSvgEdgeContainer = document.createElementNS('http://www.w3.org/2000/svg', 'g');
newSvgEdgeContainer.id = containerId;
this.entities.appendChild(newSvgEdgeContainer);
edgeContainer = newSvgEdgeContainer;
}
// ReactDOM.render replaces the insides of an element This renders the element
// into the edgeContainer
Eif (edgeContainer) {
ReactDOM.render(element, edgeContainer);
Iif (afterRenderEdge) {
return afterRenderEdge(id, element, edge, edgeContainer, this.isEdgeSelected(edge));
}
}
}
asyncRenderEdge = (edge: IEdge) => {
Iif (!edge.source || !edge.target) {
return;
}
const timeoutId = `edges-${edge.source}-${edge.target}`;
clearTimeout(this.edgeTimeouts[timeoutId]);
this.edgeTimeouts[timeoutId] = setTimeout(() => {
this.syncRenderEdge(edge);
});
}
syncRenderEdge(edge: IEdge | any, nodeMoving: boolean = false) {
Iif (!edge.source) {
return;
}
// We have to use the 'custom' id when we're drawing a new node
const idVar = edge.target ? `${edge.source}-${edge.target}` : 'custom';
const id = `edge-${idVar}`;
const element = this.getEdgeComponent(edge);
this.renderEdge(id, element, edge, nodeMoving);
}
renderEdges = () => {
if (!this.entities || this.state.draggingEdge) {
return;
}
this.state.edges.forEach((edge) => {
this.asyncRenderEdge(edge);
});
}
/*
* GraphControls is a special child component. To maximize responsiveness we disable
* rendering on zoom level changes, but this component still needs to update.
* This function ensures that it updates into the container quickly upon zoom changes
* without causing a full GraphView render.
*/
renderGraphControls() {
if (!this.props.showGraphControls) {
return;
}
const graphControlsWrapper = document.querySelector('.graph-controls-wrapper')
Eif (graphControlsWrapper) {
ReactDOM.render(
<GraphControls
ref={this.graphControls}
minZoom={this.props.minZoom}
maxZoom={this.props.maxZoom}
zoomLevel={this.state.viewTransform ? this.state.viewTransform.k : 1}
zoomToFit={this.handleZoomToFit}
modifyZoom={this.modifyZoom}
/>,
graphControlsWrapper
);
}
}
render() {
const { edgeArrowSize, gridSpacing, gridDotSize, nodeTypes, nodeSubtypes, edgeTypes, renderDefs } = this.props;
return (
<div
className="view-wrapper"
ref={(el) => (this.viewWrapper = el)}
>
<svg className="graph">
<Defs
edgeArrowSize={edgeArrowSize}
gridSpacing={gridSpacing}
gridDotSize={gridDotSize}
nodeTypes={nodeTypes}
nodeSubtypes={nodeSubtypes}
edgeTypes={edgeTypes}
renderDefs={renderDefs}
/>
<g className="view" ref={(el) => (this.view = el)}>
{this.renderBackground()}
<g className="entities" ref={(el) => (this.entities = el)} />
</g>
</svg>
<div className="graph-controls-wrapper" />
</div>
);
}
}
export default GraphView;
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