ngx-diagrams
Version:
> Light Weight, Modular, Typed Diagram Engine for Angular
230 lines • 27.8 kB
JavaScript
import { BaseEntity } from '../base.entity';
import { createEntityState, createValueState } from '../state/state';
import { coerceArray, isEmptyArray, unique } from '../utils';
import { LinkModel } from './link.model';
import { NodeModel } from './node.model';
export class DiagramModel extends BaseEntity {
constructor(diagramEngine, id, logPrefix = '[Diagram]') {
super(id, logPrefix);
this.diagramEngine = diagramEngine;
this.nodes$ = createEntityState([], this.entityPipe('nodes'));
this.links$ = createEntityState([], this.entityPipe('links'));
this.offsetX$ = createValueState(0, this.entityPipe('offsetX'));
this.offsetY$ = createValueState(0, this.entityPipe('offsetY'));
this.zoom$ = createValueState(100, this.entityPipe('zoom'));
this.maxZoomOut$ = createValueState(null);
this.maxZoomIn$ = createValueState(null);
this.gridSize$ = createValueState(0);
}
// TODO: support the following events for links and nodes
// removed, updated<positionChanged/dataChanged>, added
getNodes() {
return this.nodes$.value;
}
getNodesArray() {
return this.nodes$.array();
}
getNode(id) {
return this.nodes$.get(id);
}
getLink(id) {
return this.links$.get(id);
}
getLinks() {
return this.links$.value;
}
getLinksArray() {
return this.links$.array();
}
getAllPorts(options = {}) {
const result = new Map();
this.getNodes().forEach((node) => {
const ports = options.filter ? node.getPortsArray().filter(options.filter) : node.getPortsArray();
ports.forEach((port) => result.set(port.id, port));
});
return result;
}
/**
* Add a node to the diagram
* @returns Inserted Node
*/
addNode(node) {
this.nodes$.add(node).emit();
return node;
}
/**
* Delete a node from the diagram
*/
deleteNode(nodeOrId) {
const nodeId = typeof nodeOrId === 'string' ? nodeOrId : nodeOrId.id;
const node = this.getNode(nodeId);
for (const port of node.getPorts().values()) {
for (const link of port.getLinks().values()) {
this.deleteLink(link);
}
}
this.nodes$.remove(nodeId).emit();
}
/**
* Get nodes as observable, use `.getValue()` for snapshot
*/
selectNodes() {
return this.nodes$.value$;
}
/**
* Add link
* @returns Newly created link
*/
addLink(link) {
this.links$.add(link).emit();
return link;
}
/**
* Delete link
*/
deleteLink(linkOrId) {
const linkId = typeof linkOrId === 'string' ? linkOrId : linkOrId.id;
this.links$.remove(linkId).emit();
}
reset() {
this.nodes$.clear().emit();
this.links$.clear().emit();
}
/**
* Get links behaviour subject, use `.getValue()` for snapshot
*/
selectLinks() {
return this.links$.value$;
}
// /**
// * Serialize the diagram model to JSON
// * @returns diagram model as a string
// */
serialize() {
const serializedNodes = this.nodes$.map((node) => node.serialize());
const serializedLinks = this.links$.map((link) => link.serialize());
return Object.assign(Object.assign({}, super.serialize()), { nodes: serializedNodes, links: serializedLinks });
}
setMaxZoomOut(maxZoomOut) {
this.maxZoomOut$.set(maxZoomOut).emit();
}
setMaxZoomIn(maxZoomIn) {
this.maxZoomIn$.set(maxZoomIn).emit();
}
getMaxZoomOut() {
return this.maxZoomOut$.value;
}
getMaxZoomIn() {
return this.maxZoomIn$.value;
}
setOffset(x, y) {
this.offsetX$.set(x).emit();
this.offsetY$.set(y).emit();
}
setOffsetX(x) {
this.offsetX$.set(x).emit();
}
getOffsetX() {
return this.offsetX$.value;
}
selectOffsetX() {
return this.offsetX$.value$;
}
setOffsetY(y) {
this.offsetY$.set(y).emit();
}
getOffsetY() {
return this.offsetY$.value;
}
selectOffsetY() {
return this.offsetY$.value$;
}
setZoomLevel(z) {
const maxZoomIn = this.getMaxZoomIn();
const maxZoomOut = this.getMaxZoomOut();
// check if zoom levels exceeded defined boundaries
if ((maxZoomIn && z > maxZoomIn) || (maxZoomOut && z < maxZoomOut)) {
return;
}
this.zoom$.set(z).emit();
}
getZoomLevel() {
return this.zoom$.value;
}
selectZoomLevel() {
return this.zoom$.value$;
}
getDiagramEngine() {
return this.diagramEngine;
}
clearSelection(ignore = null) {
this.getSelectedItems().forEach((element) => {
if ((ignore === null || ignore === void 0 ? void 0 : ignore.id) === element.id) {
return;
}
element.setSelected(false);
});
}
getGridPosition({ x, y }) {
const gridSize = this.gridSize$.value;
if (gridSize === 0) {
return { x, y };
}
return {
x: gridSize * Math.floor((x + gridSize / 2) / gridSize),
y: gridSize * Math.floor((y + gridSize / 2) / gridSize)
};
}
getSelectedItems(...filters) {
filters = coerceArray(filters);
const items = [];
const nodes = this.nodes$.array();
const links = this.links$.array();
const selectedNodes = () => nodes.flatMap((node) => node.getSelectedEntities());
const selectedPorts = () => nodes.flatMap((node) => node.getPortsArray().flatMap((port) => port.getSelectedEntities()));
const selectedLinks = () => links.flatMap((link) => link.getSelectedEntities());
const selectedPoints = () => links.flatMap((link) => link.getPoints().flatMap((point) => point.getSelectedEntities()));
if (isEmptyArray(filters)) {
items.push(...selectedNodes(), ...selectedPorts(), ...selectedLinks(), ...selectedPoints());
}
else {
const byType = {
node: selectedNodes,
port: selectedPorts,
link: selectedLinks,
point: selectedPoints
};
for (const type of filters) {
items.push(...byType[type]());
}
}
return unique(items);
}
addAll(...models) {
const links = [];
const nodes = [];
for (const model of models) {
if (model instanceof LinkModel) {
links.push(model);
}
else if (model instanceof NodeModel) {
nodes.push(model);
}
}
this.addLinks(links);
this.addNodes(nodes);
return models;
}
addLinks(links) {
this.links$.addMany(links).emit();
}
addNodes(nodes) {
this.nodes$.addMany(nodes).emit();
}
destroy() {
super.destroy();
this.nodes$.destroy();
this.links$.destroy();
}
}
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{ Observable } from 'rxjs';\nimport { BaseEntity, BaseEntityType } from '../base.entity';\nimport { Coords } from '../interfaces/coords.interface';\nimport { SelectOptions } from '../interfaces/select-options.interface';\nimport { SerializedDiagramModel } from '../interfaces/serialization.interface';\nimport { DiagramEngine } from '../services/engine.service';\nimport { createEntityState, createValueState } from '../state/state';\nimport { coerceArray, ID, isEmptyArray, unique } from '../utils';\nimport { EntityMap } from '../utils/types';\nimport { BaseModel } from './base.model';\nimport { LinkModel } from './link.model';\nimport { NodeModel } from './node.model';\nimport { PortModel } from './port.model';\n\nexport class DiagramModel extends BaseEntity {\n  protected nodes$ = createEntityState<NodeModel>([], this.entityPipe('nodes'));\n  protected links$ = createEntityState<LinkModel>([], this.entityPipe('links'));\n  protected offsetX$ = createValueState(0, this.entityPipe('offsetX'));\n  protected offsetY$ = createValueState(0, this.entityPipe('offsetY'));\n  protected zoom$ = createValueState(100, this.entityPipe('zoom'));\n  protected maxZoomOut$ = createValueState(null);\n  protected maxZoomIn$ = createValueState(null);\n  protected gridSize$ = createValueState(0);\n\n  constructor(protected diagramEngine: DiagramEngine, id?: string, logPrefix = '[Diagram]') {\n    super(id, logPrefix);\n  }\n\n  // TODO: support the following events for links and nodes\n  // removed, updated<positionChanged/dataChanged>, added\n  getNodes(): EntityMap<NodeModel> {\n    return this.nodes$.value;\n  }\n\n  getNodesArray(): NodeModel[] {\n    return this.nodes$.array();\n  }\n\n  getNode(id: ID): NodeModel | undefined {\n    return this.nodes$.get(id);\n  }\n\n  getLink(id: ID): LinkModel | undefined {\n    return this.links$.get(id);\n  }\n\n  getLinks(): EntityMap<LinkModel> {\n    return this.links$.value;\n  }\n\n  getLinksArray(): LinkModel[] {\n    return this.links$.array();\n  }\n\n  getAllPorts(options: SelectOptions<PortModel> = {}): Map<string, PortModel> {\n    const result = new Map<ID, PortModel>();\n\n    this.getNodes().forEach((node) => {\n      const ports = options.filter ? node.getPortsArray().filter(options.filter) : node.getPortsArray();\n      ports.forEach((port) => result.set(port.id, port));\n    });\n\n    return result;\n  }\n\n  /**\n   * Add a node to the diagram\n   * @returns Inserted Node\n   */\n  addNode(node: NodeModel): NodeModel {\n    this.nodes$.add(node).emit();\n    return node;\n  }\n\n  /**\n   * Delete a node from the diagram\n   */\n  deleteNode(nodeOrId: NodeModel | string): void {\n    const nodeId: ID = typeof nodeOrId === 'string' ? nodeOrId : nodeOrId.id;\n    const node = this.getNode(nodeId);\n\n    for (const port of node.getPorts().values()) {\n      for (const link of port.getLinks().values()) {\n        this.deleteLink(link);\n      }\n    }\n\n    this.nodes$.remove(nodeId).emit();\n  }\n\n  /**\n   * Get nodes as observable, use `.getValue()` for snapshot\n   */\n  selectNodes(): Observable<EntityMap<NodeModel>> {\n    return this.nodes$.value$;\n  }\n\n  /**\n   * Add link\n   * @returns Newly created link\n   */\n  addLink(link: LinkModel): LinkModel {\n    this.links$.add(link).emit();\n    return link;\n  }\n\n  /**\n   * Delete link\n   */\n  deleteLink(linkOrId: LinkModel | string) {\n    const linkId: ID = typeof linkOrId === 'string' ? linkOrId : linkOrId.id;\n    this.links$.remove(linkId).emit();\n  }\n\n  reset() {\n    this.nodes$.clear().emit();\n    this.links$.clear().emit();\n  }\n\n  /**\n   * Get links behaviour subject, use `.getValue()` for snapshot\n   */\n  selectLinks(): Observable<EntityMap<LinkModel>> {\n    return this.links$.value$;\n  }\n\n  // /**\n  //  * Serialize the diagram model to JSON\n  //  * @returns diagram model as a string\n  //  */\n  serialize(): SerializedDiagramModel {\n    const serializedNodes = this.nodes$.map((node) => node.serialize());\n    const serializedLinks = this.links$.map((link) => link.serialize());\n\n    return { ...super.serialize(), nodes: serializedNodes, links: serializedLinks };\n  }\n\n  setMaxZoomOut(maxZoomOut: number) {\n    this.maxZoomOut$.set(maxZoomOut).emit();\n  }\n\n  setMaxZoomIn(maxZoomIn: number) {\n    this.maxZoomIn$.set(maxZoomIn).emit();\n  }\n\n  getMaxZoomOut() {\n    return this.maxZoomOut$.value;\n  }\n\n  getMaxZoomIn() {\n    return this.maxZoomIn$.value;\n  }\n\n  setOffset(x: number, y: number) {\n    this.offsetX$.set(x).emit();\n    this.offsetY$.set(y).emit();\n  }\n\n  setOffsetX(x: number) {\n    this.offsetX$.set(x).emit();\n  }\n\n  getOffsetX(): number {\n    return this.offsetX$.value;\n  }\n\n  selectOffsetX(): Observable<number> {\n    return this.offsetX$.value$;\n  }\n\n  setOffsetY(y: number) {\n    this.offsetY$.set(y).emit();\n  }\n\n  getOffsetY(): number {\n    return this.offsetY$.value;\n  }\n\n  selectOffsetY(): Observable<number> {\n    return this.offsetY$.value$;\n  }\n\n  setZoomLevel(z: number) {\n    const maxZoomIn = this.getMaxZoomIn();\n    const maxZoomOut = this.getMaxZoomOut();\n\n    // check if zoom levels exceeded defined boundaries\n    if ((maxZoomIn && z > maxZoomIn) || (maxZoomOut && z < maxZoomOut)) {\n      return;\n    }\n\n    this.zoom$.set(z).emit();\n  }\n\n  getZoomLevel(): number {\n    return this.zoom$.value;\n  }\n\n  selectZoomLevel(): Observable<number> {\n    return this.zoom$.value$;\n  }\n\n  getDiagramEngine(): DiagramEngine {\n    return this.diagramEngine;\n  }\n\n  clearSelection(ignore: BaseModel | null = null) {\n    this.getSelectedItems().forEach((element) => {\n      if (ignore?.id === element.id) {\n        return;\n      }\n      element.setSelected(false);\n    });\n  }\n\n  getGridPosition({ x, y }: Coords): Coords {\n    const gridSize = this.gridSize$.value;\n    if (gridSize === 0) {\n      return { x, y };\n    }\n\n    return {\n      x: gridSize * Math.floor((x + gridSize / 2) / gridSize),\n      y: gridSize * Math.floor((y + gridSize / 2) / gridSize)\n    };\n  }\n\n  getSelectedItems(...filters: BaseEntityType[]): BaseModel[] {\n    filters = coerceArray(filters);\n\n    const items: BaseModel[] = [];\n    const nodes = this.nodes$.array();\n    const links = this.links$.array();\n\n    const selectedNodes = () => nodes.flatMap((node) => node.getSelectedEntities());\n    const selectedPorts = () =>\n      nodes.flatMap((node) => node.getPortsArray().flatMap((port: PortModel) => port.getSelectedEntities()));\n    const selectedLinks = () => links.flatMap((link) => link.getSelectedEntities());\n    const selectedPoints = () =>\n      links.flatMap((link) => link.getPoints().flatMap((point) => point.getSelectedEntities()));\n\n    if (isEmptyArray(filters)) {\n      items.push(...selectedNodes(), ...selectedPorts(), ...selectedLinks(), ...selectedPoints());\n    } else {\n      const byType: Record<BaseEntityType, () => BaseModel[]> = {\n        node: selectedNodes,\n        port: selectedPorts,\n        link: selectedLinks,\n        point: selectedPoints\n      };\n\n      for (const type of filters) {\n        items.push(...byType[type]());\n      }\n    }\n\n    return unique(items);\n  }\n\n  addAll(...models: BaseModel[]) {\n    const links: LinkModel[] = [];\n    const nodes: NodeModel[] = [];\n\n    for (const model of models) {\n      if (model instanceof LinkModel) {\n        links.push(model);\n      } else if (model instanceof NodeModel) {\n        nodes.push(model);\n      }\n    }\n\n    this.addLinks(links);\n    this.addNodes(nodes);\n\n    return models;\n  }\n\n  addLinks(links: LinkModel[]) {\n    this.links$.addMany(links).emit();\n  }\n\n  addNodes(nodes: NodeModel[]) {\n    this.nodes$.addMany(nodes).emit();\n  }\n\n  destroy() {\n    super.destroy();\n    this.nodes$.destroy();\n    this.links$.destroy();\n  }\n}\n"]}