@qrsln/highlighter
Version:
Based on highlighter.js
115 lines • 14.3 kB
JavaScript
import { Directive, Input } from '@angular/core';
import { HighlighterComponent } from './Components/highlighter/highlighter.component';
import * as i0 from "@angular/core";
export class HighlighterDirective {
elementRef;
viewContainerRef;
Options;
Theme = 'stackoverflow-dark'; // Stackoverflow Dark
Lang;
Code = '<html lang="en"></html>';
LineNumbers = false;
// @Input() theme: string;
el;
componentRef;
constructor(elementRef, // private appRef: ApplicationRef,
viewContainerRef) {
this.elementRef = elementRef;
this.viewContainerRef = viewContainerRef;
this.el = this.elementRef.nativeElement;
}
ngOnChanges(changes) {
if (!!changes['Theme'] && !changes['Theme'].firstChange) {
// console.log(changes);
this.Destroy();
this.SetComponent().then();
}
if (!!changes['LineNumbers'] && !changes['LineNumbers'].firstChange) {
// console.log(changes);
this.Destroy();
this.SetComponent().then();
}
if (!!changes['Code'] && !changes['Code'].firstChange) {
// console.log(changes);
this.Destroy();
this.SetComponent().then();
}
}
ngOnInit() {
this.SetComponent().then();
}
async SetComponent() {
if (this.Code === undefined || this.Code === '<html lang="en"></html>') {
this.Code = await this.GetContent();
}
// console.log(this.code);
this.componentRef = this.GetComponentRef();
this.componentRef.instance.Lang = this.Lang;
this.componentRef.instance.ClassName = this.el.className;
this.componentRef.instance.LineNumbers = this.LineNumbers;
if (this.Theme) {
this.componentRef.instance.Theme = this.Theme;
}
this.componentRef.instance.Code = this.Code;
this.componentRef.instance.Options = this.Options;
// Clear the evidence
// this.el.parentNode.removeChild(this.el);
this.el.style.display = 'none';
}
async GetContent() {
try {
const childNode = await this.el.childNodes[0]; // TextNode
// console.log('GetContent() ChildNode', childNode.textContent);
return childNode.textContent || '';
}
catch (e) {
return 'couldn\'t get innerHTML';
}
}
GetComponentRef() {
// 1. Create a component reference from the component
const componentRef = this.viewContainerRef.createComponent(HighlighterComponent);
// 2. Attach component to the appRef so that it's inside the ng component tree
// this.appRef.attachView(componentRef.hostView);
// TODO: Causes Error: NG0902: This view is already attached to a ViewContainer!
// 3. Get DOM element from component
const domElem = componentRef.hostView.rootNodes[0];
// 4. Append DOM element to the body
if (this.el.parentNode) {
this.el.parentNode.insertBefore(domElem, this.el.nextSibling);
// console.log('append as Sibling', domElem);
}
else {
this.el.appendChild(domElem);
// console.log('appendChild', domElem);
}
return componentRef;
}
Destroy() {
if (this.componentRef) {
this.componentRef.destroy();
}
}
ngOnDestroy() {
this.Destroy();
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.1.3", ngImport: i0, type: HighlighterDirective, deps: [{ token: i0.ElementRef }, { token: i0.ViewContainerRef }], target: i0.ɵɵFactoryTarget.Directive });
static ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.1.3", type: HighlighterDirective, selector: "[qlHighlighter], [Highlighter]", inputs: { Options: "Options", Theme: "Theme", Lang: "Lang", Code: "Code", LineNumbers: "LineNumbers" }, usesOnChanges: true, ngImport: i0 });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.1.3", ngImport: i0, type: HighlighterDirective, decorators: [{
type: Directive,
args: [{
selector: '[qlHighlighter], [Highlighter]',
}]
}], ctorParameters: () => [{ type: i0.ElementRef }, { type: i0.ViewContainerRef }], propDecorators: { Options: [{
type: Input
}], Theme: [{
type: Input
}], Lang: [{
type: Input
}], Code: [{
type: Input
}], LineNumbers: [{
type: Input
}] } });
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// Stackoverflow Dark\r\n  @Input() Lang: string | undefined;\r\n  @Input() Code = '<html lang=\"en\"></html>';\r\n  @Input() LineNumbers = false;\r\n\r\n  // @Input() theme: string;\r\n  private readonly el: HTMLElement;\r\n  private componentRef: ComponentRef<HighlighterComponent> | undefined;\r\n\r\n  constructor(private elementRef: ElementRef<HTMLElement>, // private appRef: ApplicationRef,\r\n              private viewContainerRef: ViewContainerRef) {\r\n    this.el = this.elementRef.nativeElement;\r\n  }\r\n\r\n  ngOnChanges(changes: SimpleChanges): void {\r\n    if (!!changes['Theme'] && !changes['Theme'].firstChange) {\r\n      // console.log(changes);\r\n      this.Destroy();\r\n      this.SetComponent().then();\r\n    }\r\n    if (!!changes['LineNumbers'] && !changes['LineNumbers'].firstChange) {\r\n      // console.log(changes);\r\n      this.Destroy();\r\n      this.SetComponent().then();\r\n    }\r\n    if (!!changes['Code'] && !changes['Code'].firstChange) {\r\n      // console.log(changes);\r\n      this.Destroy();\r\n      this.SetComponent().then();\r\n    }\r\n  }\r\n\r\n  ngOnInit(): void {\r\n    this.SetComponent().then();\r\n  }\r\n\r\n  private async SetComponent(): Promise<void> {\r\n    if (this.Code === undefined || this.Code === '<html lang=\"en\"></html>') {\r\n      this.Code = await this.GetContent();\r\n    }\r\n    // console.log(this.code);\r\n\r\n    this.componentRef = this.GetComponentRef();\r\n\r\n    this.componentRef.instance.Lang = this.Lang;\r\n    this.componentRef.instance.ClassName = this.el.className;\r\n    this.componentRef.instance.LineNumbers = this.LineNumbers;\r\n    if (this.Theme) {\r\n      this.componentRef.instance.Theme = this.Theme;\r\n    }\r\n    this.componentRef.instance.Code = this.Code;\r\n    this.componentRef.instance.Options = this.Options;\r\n\r\n    // Clear the evidence\r\n    // this.el.parentNode.removeChild(this.el);\r\n    this.el.style.display = 'none';\r\n  }\r\n\r\n  private async GetContent(): Promise<string> {\r\n    try {\r\n      const childNode = await this.el.childNodes[0] as ChildNode; // TextNode\r\n      // console.log('GetContent() ChildNode', childNode.textContent);\r\n      return childNode.textContent || '';\r\n    } catch (e) {\r\n      return 'couldn\\'t get innerHTML';\r\n    }\r\n  }\r\n\r\n  private GetComponentRef(): ComponentRef<HighlighterComponent> {\r\n    // 1. Create a component reference from the component\r\n    const componentRef = this.viewContainerRef.createComponent(HighlighterComponent);\r\n\r\n    // 2. Attach component to the appRef so that it's inside the ng component tree\r\n    // this.appRef.attachView(componentRef.hostView);\r\n    // TODO: Causes Error: NG0902: This view is already attached to a ViewContainer!\r\n\r\n    // 3. Get DOM element from component\r\n    const domElem = (componentRef.hostView as EmbeddedViewRef<any>).rootNodes[0] as HTMLElement;\r\n\r\n    // 4. Append DOM element to the body\r\n    if (this.el.parentNode) {\r\n      this.el.parentNode.insertBefore(domElem, this.el.nextSibling);\r\n      // console.log('append as Sibling', domElem);\r\n    } else {\r\n      this.el.appendChild(domElem);\r\n      // console.log('appendChild', domElem);\r\n    }\r\n\r\n    return componentRef;\r\n  }\r\n\r\n  private Destroy(): void {\r\n    if (this.componentRef) {\r\n      this.componentRef.destroy();\r\n    }\r\n  }\r\n\r\n  ngOnDestroy(): void {\r\n    this.Destroy();\r\n  }\r\n\r\n}\r\n"]}