375 lines
11 KiB
TypeScript
375 lines
11 KiB
TypeScript
import {
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NodeBase,
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CoordinateExtent,
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InternalNodeUpdate,
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NodeOrigin,
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PanZoomInstance,
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Transform,
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XYPosition,
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XYZPosition,
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ConnectionLookup,
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EdgeBase,
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EdgeLookup,
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InternalNodeBase,
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NodeLookup,
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Rect,
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NodeDimensionChange,
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NodePositionChange,
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ParentLookup,
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} from '../types';
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import { getDimensions, getHandleBounds } from './dom';
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import { getBoundsOfRects, getNodeDimensions, isNumeric, nodeToRect } from './general';
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import { getNodePositionWithOrigin } from './graph';
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import { ParentExpandChild } from './types';
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export function updateAbsolutePositions<NodeType extends NodeBase>(
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nodeLookup: Map<string, InternalNodeBase<NodeType>>,
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options: UpdateNodesOptions<NodeType> = {
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nodeOrigin: [0, 0] as NodeOrigin,
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elevateNodesOnSelect: true,
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defaults: {},
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}
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) {
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const selectedNodeZ: number = options?.elevateNodesOnSelect ? 1000 : 0;
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for (const [, node] of nodeLookup) {
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const parentId = node.parentId;
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if (!parentId) {
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continue;
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}
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if (!nodeLookup.has(parentId)) {
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throw new Error(`Parent node ${parentId} not found`);
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}
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const parentNode = nodeLookup.get(parentId);
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const { x, y, z } = calculateXYZPosition(
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node,
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nodeLookup,
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{
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...node.position,
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z: (isNumeric(node.zIndex) ? node.zIndex : 0) + (node.selected ? selectedNodeZ : 0),
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},
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parentNode?.origin ?? options.nodeOrigin
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);
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const currPosition = node.internals.positionAbsolute;
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const positionChanged = x !== currPosition.x || y !== currPosition.y;
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if (positionChanged || z !== node.internals.z) {
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node.internals = {
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...node.internals,
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positionAbsolute: positionChanged ? { x, y } : currPosition,
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z,
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};
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}
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}
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}
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type UpdateNodesOptions<NodeType extends NodeBase> = {
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nodeOrigin?: NodeOrigin;
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elevateNodesOnSelect?: boolean;
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defaults?: Partial<NodeType>;
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checkEquality?: boolean;
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};
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export function adoptUserNodes<NodeType extends NodeBase>(
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nodes: NodeType[],
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nodeLookup: Map<string, InternalNodeBase<NodeType>>,
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parentLookup: Map<string, InternalNodeBase<NodeType>[]>,
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options: UpdateNodesOptions<NodeType> = {
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nodeOrigin: [0, 0] as NodeOrigin,
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elevateNodesOnSelect: true,
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defaults: {},
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checkEquality: true,
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}
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) {
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const tmpLookup = new Map(nodeLookup);
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nodeLookup.clear();
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parentLookup.clear();
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const selectedNodeZ: number = options?.elevateNodesOnSelect ? 1000 : 0;
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nodes.forEach((userNode) => {
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let internalNode = tmpLookup.get(userNode.id);
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if (options.checkEquality && userNode === internalNode?.internals.userNode) {
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nodeLookup.set(userNode.id, internalNode);
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} else {
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internalNode = {
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...options.defaults,
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...userNode,
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measured: {
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width: userNode.measured?.width,
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height: userNode.measured?.height,
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},
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internals: {
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positionAbsolute: userNode.position,
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handleBounds: internalNode?.internals.handleBounds,
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z: (isNumeric(userNode.zIndex) ? userNode.zIndex : 0) + (userNode.selected ? selectedNodeZ : 0),
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userNode,
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},
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};
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nodeLookup.set(userNode.id, internalNode);
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}
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if (userNode.parentId) {
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const childNodes = parentLookup.get(userNode.parentId);
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if (childNodes) {
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childNodes.push(internalNode);
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} else {
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parentLookup.set(userNode.parentId, [internalNode]);
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}
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}
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});
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if (parentLookup.size > 0) {
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updateAbsolutePositions(nodeLookup, options);
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}
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}
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function calculateXYZPosition<NodeType extends NodeBase>(
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node: NodeType,
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nodeLookup: Map<string, InternalNodeBase<NodeType>>,
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result: XYZPosition,
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nodeOrigin: NodeOrigin = [0, 0]
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): XYZPosition {
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if (!node.parentId) {
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return result;
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}
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const parentNode = nodeLookup.get(node.parentId)!;
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const { position: parentNodePosition } = getNodePositionWithOrigin(parentNode, parentNode?.origin || nodeOrigin);
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return calculateXYZPosition(
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parentNode,
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nodeLookup,
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{
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x: (result.x ?? 0) + parentNodePosition.x,
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y: (result.y ?? 0) + parentNodePosition.y,
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z: (parentNode.internals.z ?? 0) > (result.z ?? 0) ? parentNode.internals.z ?? 0 : result.z ?? 0,
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},
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parentNode.origin || nodeOrigin
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);
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}
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export function handleExpandParent(
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children: ParentExpandChild[],
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nodeLookup: NodeLookup,
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parentLookup: ParentLookup,
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nodeOrigin?: NodeOrigin
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): (NodeDimensionChange | NodePositionChange)[] {
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const changes: (NodeDimensionChange | NodePositionChange)[] = [];
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const parentExpansions = new Map<string, { expandedRect: Rect; parent: InternalNodeBase }>();
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// determine the expanded rectangle the child nodes would take for each parent
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for (const child of children) {
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const parent = nodeLookup.get(child.parentId);
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if (!parent) {
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continue;
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}
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const parentRect =
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parentExpansions.get(child.parentId)?.expandedRect ?? nodeToRect(parent, parent.origin ?? nodeOrigin);
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const expandedRect = getBoundsOfRects(parentRect, child.rect);
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parentExpansions.set(child.parentId, { expandedRect, parent });
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}
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if (parentExpansions.size > 0) {
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parentExpansions.forEach(({ expandedRect, parent }, parentId) => {
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// determine the position & dimensions of the parent
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const { position } = getNodePositionWithOrigin(parent, parent.origin);
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const dimensions = getNodeDimensions(parent);
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// determine how much the parent expands by moving the position
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const xChange = expandedRect.x < position.x ? Math.round(Math.abs(position.x - expandedRect.x)) : 0;
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const yChange = expandedRect.y < position.y ? Math.round(Math.abs(position.y - expandedRect.y)) : 0;
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if (xChange > 0 || yChange > 0) {
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changes.push({
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id: parentId,
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type: 'position',
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position: {
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x: position.x - xChange,
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y: position.y - yChange,
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},
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});
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// We move all child nodes in the oppsite direction
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// so the x,y changes of the parent do not move the children
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const childNodes = parentLookup.get(parentId);
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childNodes?.forEach((childNode) => {
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if (!children.some((child) => child.id === childNode.id)) {
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changes.push({
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id: childNode.id,
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type: 'position',
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position: {
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x: childNode.position.x + xChange,
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y: childNode.position.y + yChange,
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},
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});
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}
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});
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}
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if (dimensions.width < expandedRect.width || dimensions.height < expandedRect.height) {
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changes.push({
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id: parentId,
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type: 'dimensions',
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resizing: true,
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dimensions: {
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width: Math.max(dimensions.width, Math.round(expandedRect.width)),
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height: Math.max(dimensions.height, Math.round(expandedRect.height)),
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},
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});
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}
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});
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}
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return changes;
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}
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export function updateNodeInternals<NodeType extends InternalNodeBase>(
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updates: Map<string, InternalNodeUpdate>,
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nodeLookup: NodeLookup<NodeType>,
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parentLookup: ParentLookup<NodeType>,
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domNode: HTMLElement | null,
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nodeOrigin?: NodeOrigin
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): { changes: (NodeDimensionChange | NodePositionChange)[]; updatedInternals: boolean } {
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const viewportNode = domNode?.querySelector('.xyflow__viewport');
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let updatedInternals = false;
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if (!viewportNode) {
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return { changes: [], updatedInternals };
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}
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const changes: (NodeDimensionChange | NodePositionChange)[] = [];
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const style = window.getComputedStyle(viewportNode);
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const { m22: zoom } = new window.DOMMatrixReadOnly(style.transform);
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// in this array we collect nodes, that might trigger changes (like expanding parent)
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const parentExpandChildren: ParentExpandChild[] = [];
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updates.forEach((update) => {
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const node = nodeLookup.get(update.id);
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if (node?.hidden) {
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nodeLookup.set(node.id, {
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...node,
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internals: {
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...node.internals,
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handleBounds: undefined,
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},
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});
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updatedInternals = true;
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} else if (node) {
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const dimensions = getDimensions(update.nodeElement);
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const dimensionChanged = node.measured.width !== dimensions.width || node.measured.height !== dimensions.height;
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const doUpdate = !!(
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dimensions.width &&
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dimensions.height &&
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(dimensionChanged || !node.internals.handleBounds || update.force)
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);
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if (doUpdate) {
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const newNode = {
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...node,
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measured: dimensions,
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internals: {
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...node.internals,
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handleBounds: {
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source: getHandleBounds('.source', update.nodeElement, zoom, node.origin || nodeOrigin),
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target: getHandleBounds('.target', update.nodeElement, zoom, node.origin || nodeOrigin),
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},
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},
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};
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nodeLookup.set(node.id, newNode);
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updatedInternals = true;
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if (dimensionChanged) {
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changes.push({
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id: newNode.id,
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type: 'dimensions',
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dimensions,
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});
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if (newNode.expandParent && newNode.parentId) {
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parentExpandChildren.push({
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id: newNode.id,
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parentId: newNode.parentId,
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rect: nodeToRect(newNode, newNode.origin || nodeOrigin),
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});
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}
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}
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}
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}
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});
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if (parentExpandChildren.length > 0) {
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const parentExpandChanges = handleExpandParent(parentExpandChildren, nodeLookup, parentLookup, nodeOrigin);
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changes.push(...parentExpandChanges);
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}
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return { changes, updatedInternals };
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}
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export function panBy({
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delta,
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panZoom,
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transform,
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translateExtent,
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width,
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height,
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}: {
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delta: XYPosition;
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panZoom: PanZoomInstance | null;
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transform: Transform;
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translateExtent: CoordinateExtent;
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width: number;
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height: number;
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}) {
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if (!panZoom || (!delta.x && !delta.y)) {
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return false;
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}
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const nextViewport = panZoom.setViewportConstrained(
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{
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x: transform[0] + delta.x,
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y: transform[1] + delta.y,
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zoom: transform[2],
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},
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[
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[0, 0],
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[width, height],
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],
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translateExtent
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);
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const transformChanged =
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!!nextViewport &&
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(nextViewport.x !== transform[0] || nextViewport.y !== transform[1] || nextViewport.k !== transform[2]);
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return transformChanged;
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}
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export function updateConnectionLookup(connectionLookup: ConnectionLookup, edgeLookup: EdgeLookup, edges: EdgeBase[]) {
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connectionLookup.clear();
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edgeLookup.clear();
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for (const edge of edges) {
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const { source, target, sourceHandle = null, targetHandle = null } = edge;
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const sourceKey = `${source}-source-${sourceHandle}`;
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const targetKey = `${target}-target-${targetHandle}`;
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const prevSource = connectionLookup.get(sourceKey) || new Map();
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const prevTarget = connectionLookup.get(targetKey) || new Map();
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const connection = { edgeId: edge.id, source, target, sourceHandle, targetHandle };
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edgeLookup.set(edge.id, edge);
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connectionLookup.set(sourceKey, prevSource.set(`${target}-${targetHandle}`, connection));
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connectionLookup.set(targetKey, prevTarget.set(`${source}-${sourceHandle}`, connection));
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}
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}
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