ngx-cytoscapejs
Version:
Cytoscape.js Angular Wrapper
192 lines • 22.1 kB
JavaScript
import { Component, EventEmitter, inject, Input, Output, ViewChild, } from '@angular/core';
import cytoscape from 'cytoscape';
import { debounceTime, fromEvent, Subject, takeUntil } from 'rxjs';
import { CxConverter } from '../enum/cx-converter.enum';
import { CxService } from '../service/cx.service';
import * as i0 from "@angular/core";
/**
* This component handles rendering the Cytoscape.js graph.
*/
export class CytoscapejsComponent {
/**
* Object containing information about a graph. Must conform to [CytoscapeOptions]{@link https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/cytoscape/index.d.ts}. A specified container is ignored.
* Should not be defined, if you are using {@link cxData} to build a graph.
*/
cytoscapeOptions;
/**
* Responsible for automatically resizing the graph when the browser window changes its size.
* If true, resizing the graph is triggered.
* If false, changes in window size are ignored.
*/
autoFit = true;
/**
* Responsible for applying the background color specified in the CX file to the canvas.
* If true, the network's background color will be set to the color specified in the CX.
* If false, the network's background color will be white.
*/
applyCxBackgroundColor = false;
/**
* Object containing information about a graph. Must conform to [CX data model]{@link https://home.ndexbio.org/data-model/}.
* Should not be defined, if you are using {@link cytoscapeOptions} to build a graph.
*/
cxData;
/**
* List of {@link CxConverter}s you wish to use for conversion of your {@link cxData}.
* Arrange the converters in the order, in which they are to be executed, e.g. the first converter you specify will be tried first.
* The first successful conversion result will be rendered.
*/
cxConverters = [
CxConverter.cx2js,
CxConverter.cxVizConverter,
];
/**
* Each time a new [Cytoscape.js core]{@link https://js.cytoscape.org/#core} is built, this output is firing an event containing the recent core.
*/
coreChanged = new EventEmitter();
/**
* Each time a new [Cytoscape.js core]{@link https://js.cytoscape.org/#core} is built using [cx2js]{@link https://github.com/cytoscape/cx2js} the
* resulting attributeNameMap object is emitted as well.
*/
cxAttributeNameMapChanged = new EventEmitter();
/**
* Reference to the HTMLElement that is used as a [container]{@link https://js.cytoscape.org/#core/initialisation} for the graph.
*
* @internal
*/
cyElementRef;
/**
* Represents a state in the [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} indicating, that the view has been initialized.
*
* @internal
*/
isViewInitialized = false;
/**
* [Cytoscape.js core]{@link https://js.cytoscape.org/#core} that is rendered.
*
* @internal
*/
core;
/**
* Serves as an indicator, when the component has been destroyed.
*
* @internal
*/
destroy$ = new Subject();
/**
* Service responsible for conversion
*
* @internal
*/
cxService = inject(CxService);
/**
* [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called as soon as the view has been initialized.
* Used to subscribe to any window resize event. Triggers initial rendering.
*/
ngAfterViewInit() {
fromEvent(window, 'resize')
.pipe(takeUntil(this.destroy$), debounceTime(300))
.subscribe(() => this.fit());
this.isViewInitialized = true;
this.preRender();
}
/**
* [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called every time, an input property changes its value.
* Used to update the graph's visualization.
*
* @param {SimpleChanges} changes Object containing all changes
*/
ngOnChanges(changes) {
const { cytoscapeOptions, cxData, autoFit } = changes;
if (cytoscapeOptions || cxData) {
this.preRender();
}
if (autoFit) {
this.fit();
}
}
/**
* [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called as soon as the component is destroyed.
* Used to unsubscribe from window resize events.
*/
ngOnDestroy() {
this.destroy$.next(true);
this.destroy$.complete();
}
/**
* Based on the user's input, this method decides, if rendering can happen and which input is to be used.
*/
preRender() {
if (!this.isViewInitialized || (!this.cytoscapeOptions && !this.cxData)) {
return;
}
if (this.cytoscapeOptions) {
this.render(this.cytoscapeOptions);
}
else if (this.cxData) {
const conversion = this.cxService.convert(this.cxData, this.cxConverters);
if (conversion) {
const { options, attributeNameMap, backgroundColor } = conversion;
if (this.cyElementRef && this.cyElementRef.nativeElement) {
const htmlElement = this.cyElementRef.nativeElement;
if (this.applyCxBackgroundColor && backgroundColor) {
htmlElement.style.backgroundColor = backgroundColor;
}
else {
htmlElement.style.backgroundColor = '';
}
}
this.cxAttributeNameMapChanged.emit(attributeNameMap);
if (options) {
this.render(options);
}
}
}
}
/**
* Renders the graph using [CytoscapeOptions]{@link https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/cytoscape/index.d.ts}.
*
* @param {CytoscapeOptions} options Object containing graph information
*/
render(options) {
if (options) {
this.core = cytoscape({
...options,
container: this.cyElementRef.nativeElement,
});
this.core.fit();
this.coreChanged.emit(this.core);
}
}
/**
* Resizes and repositions the graph to fit the current window size.
*/
fit() {
if (this.autoFit && this.core) {
this.core.fit();
}
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.1.3", ngImport: i0, type: CytoscapejsComponent, deps: [], target: i0.ɵɵFactoryTarget.Component });
static ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "18.1.3", type: CytoscapejsComponent, isStandalone: true, selector: "cytoscapejs", inputs: { cytoscapeOptions: "cytoscapeOptions", autoFit: "autoFit", applyCxBackgroundColor: "applyCxBackgroundColor", cxData: "cxData", cxConverters: "cxConverters" }, outputs: { coreChanged: "coreChanged", cxAttributeNameMapChanged: "cxAttributeNameMapChanged" }, viewQueries: [{ propertyName: "cyElementRef", first: true, predicate: ["cy"], descendants: true }], usesOnChanges: true, ngImport: i0, template: "<div id=\"cy\" #cy></div>\n", styles: ["#cy{height:100%;width:100%}\n"] });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.1.3", ngImport: i0, type: CytoscapejsComponent, decorators: [{
type: Component,
args: [{ selector: 'cytoscapejs', standalone: true, template: "<div id=\"cy\" #cy></div>\n", styles: ["#cy{height:100%;width:100%}\n"] }]
}], propDecorators: { cytoscapeOptions: [{
type: Input
}], autoFit: [{
type: Input
}], applyCxBackgroundColor: [{
type: Input
}], cxData: [{
type: Input
}], cxConverters: [{
type: Input
}], coreChanged: [{
type: Output
}], cxAttributeNameMapChanged: [{
type: Output
}], cyElementRef: [{
type: ViewChild,
args: ['cy']
}] } });
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Must conform to [CytoscapeOptions]{@link https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/cytoscape/index.d.ts}. A specified container is ignored.\n   * Should not be defined, if you are using {@link cxData} to build a graph.\n   */\n  @Input() cytoscapeOptions!: CytoscapeOptions;\n\n  /**\n   * Responsible for automatically resizing the graph when the browser window changes its size.\n   * If true, resizing the graph is triggered.\n   * If false, changes in window size are ignored.\n   */\n  @Input() autoFit: boolean = true;\n\n  /**\n   * Responsible for applying the background color specified in the CX file to the canvas.\n   * If true, the network's background color will be set to the color specified in the CX.\n   * If false, the network's background color will be white.\n   */\n  @Input() applyCxBackgroundColor: boolean = false;\n\n  /**\n   * Object containing information about a graph. Must conform to [CX data model]{@link https://home.ndexbio.org/data-model/}.\n   * Should not be defined, if you are using {@link cytoscapeOptions} to build a graph.\n   */\n  @Input() cxData!: any;\n\n  /**\n   * List of {@link CxConverter}s you wish to use for conversion of your {@link cxData}.\n   * Arrange the converters in the order, in which they are to be executed, e.g. the first converter you specify will be tried first.\n   * The first successful conversion result will be rendered.\n   */\n  @Input() cxConverters: CxConverter[] = [\n    CxConverter.cx2js,\n    CxConverter.cxVizConverter,\n  ];\n\n  /**\n   * Each time a new [Cytoscape.js core]{@link https://js.cytoscape.org/#core} is built, this output is firing an event containing the recent core.\n   */\n  @Output() coreChanged: EventEmitter<Core> = new EventEmitter<Core>();\n\n  /**\n   * Each time a new [Cytoscape.js core]{@link https://js.cytoscape.org/#core} is built using [cx2js]{@link https://github.com/cytoscape/cx2js} the\n   * resulting attributeNameMap object is emitted as well.\n   */\n  @Output() cxAttributeNameMapChanged: EventEmitter<CxAttributeNameMap> =\n    new EventEmitter<CxAttributeNameMap>();\n\n  /**\n   * Reference to the HTMLElement that is used as a [container]{@link https://js.cytoscape.org/#core/initialisation} for the graph.\n   *\n   * @internal\n   */\n  @ViewChild('cy') cyElementRef!: ElementRef;\n\n  /**\n   * Represents a state in the [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} indicating, that the view has been initialized.\n   *\n   * @internal\n   */\n  private isViewInitialized: boolean = false;\n\n  /**\n   * [Cytoscape.js core]{@link https://js.cytoscape.org/#core} that is rendered.\n   *\n   * @internal\n   */\n  private core!: Core;\n\n  /**\n   * Serves as an indicator, when the component has been destroyed.\n   *\n   * @internal\n   */\n  private destroy$: Subject<boolean> = new Subject<boolean>();\n\n  /**\n   * Service responsible for conversion\n   *\n   * @internal\n   */\n  private cxService = inject(CxService);\n\n  /**\n   * [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called as soon as the view has been initialized.\n   * Used to subscribe to any window resize event. Triggers initial rendering.\n   */\n  ngAfterViewInit(): void {\n    fromEvent(window, 'resize')\n      .pipe(takeUntil(this.destroy$), debounceTime(300))\n      .subscribe(() => this.fit());\n\n    this.isViewInitialized = true;\n    this.preRender();\n  }\n\n  /**\n   * [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called every time, an input property changes its value.\n   * Used to update the graph's visualization.\n   *\n   * @param {SimpleChanges} changes Object containing all changes\n   */\n  ngOnChanges(changes: SimpleChanges): void {\n    const { cytoscapeOptions, cxData, autoFit } = changes;\n\n    if (cytoscapeOptions || cxData) {\n      this.preRender();\n    }\n\n    if (autoFit) {\n      this.fit();\n    }\n  }\n\n  /**\n   * [Angular lifecycle]{@link https://angular.io/guide/lifecycle-hooks} which is called as soon as the component is destroyed.\n   * Used to unsubscribe from window resize events.\n   */\n  ngOnDestroy(): void {\n    this.destroy$.next(true);\n    this.destroy$.complete();\n  }\n\n  /**\n   * Based on the user's input, this method decides, if rendering can happen and which input is to be used.\n   */\n  private preRender(): void {\n    if (!this.isViewInitialized || (!this.cytoscapeOptions && !this.cxData)) {\n      return;\n    }\n\n    if (this.cytoscapeOptions) {\n      this.render(this.cytoscapeOptions);\n    } else if (this.cxData) {\n      const conversion = this.cxService.convert(this.cxData, this.cxConverters);\n\n      if (conversion) {\n        const { options, attributeNameMap, backgroundColor } = conversion;\n\n        if (this.cyElementRef && this.cyElementRef.nativeElement) {\n          const htmlElement: HTMLElement = this.cyElementRef.nativeElement;\n\n          if (this.applyCxBackgroundColor && backgroundColor) {\n            htmlElement.style.backgroundColor = backgroundColor;\n          } else {\n            htmlElement.style.backgroundColor = '';\n          }\n        }\n\n        this.cxAttributeNameMapChanged.emit(attributeNameMap);\n\n        if (options) {\n          this.render(options);\n        }\n      }\n    }\n  }\n\n  /**\n   * Renders the graph using [CytoscapeOptions]{@link https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/cytoscape/index.d.ts}.\n   *\n   * @param {CytoscapeOptions} options Object containing graph information\n   */\n  private render(options: CytoscapeOptions): void {\n    if (options) {\n      this.core = cytoscape({\n        ...options,\n        container: this.cyElementRef.nativeElement,\n      });\n      this.core.fit();\n      this.coreChanged.emit(this.core);\n    }\n  }\n\n  /**\n   * Resizes and repositions the graph to fit the current window size.\n   */\n  private fit(): void {\n    if (this.autoFit && this.core) {\n      this.core.fit();\n    }\n  }\n}\n","<div id=\"cy\" #cy></div>\n"]}