Readme updates

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@proangular/ngx-gist",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "An Angular Material and HighlighJs styled display box for GitHub gist and local code snippets.",
   "author": "Pro Angular <[email protected]>",
   "homepage": "https://www.proangular.com",

src/app/app.component.ts

@@ -33,17 +33,32 @@ import { Component } from '@angular/core';
         [useCache]="false"
       ></ngx-gist>
 
+      <h4>SETTING THE CODE STYLE THEME</h4>
+      <p>
+        Select a "highlight.js" code theme to apply. Note: Only one theme can be
+        loaded on a single page at a time! The first theme to load will apply to
+        all gists on the page.
+      </p>
+      <ngx-gist
+        codeTheme="github"
+        gistId="d55ea012b585a16a9970878d90106d74"
+      ></ngx-gist>
+
       <h4>DISPLAYING ONE SPECIFIC FILE</h4>
       <p>Display only one specific file when your gist has many.</p>
       <ngx-gist
-        displayOnlyFileNames="super.js"
+        displayOnlyFileNames="javascript.js"
         gistId="d55ea012b585a16a9970878d90106d74"
       ></ngx-gist>
 
       <h4>DISPLAYING MULTIPLE, SPECIFIC FILES</h4>
       <p>You can also display any number of specific files by name.</p>
       <ngx-gist
-        [displayOnlyFileNames]="['csstest.css', 'main.ts']"
+        [displayOnlyFileNames]="[
+          'markup.html',
+          'typescript.ts',
+          'stylesheet.scss'
+        ]"
         gistId="d55ea012b585a16a9970878d90106d74"
       ></ngx-gist>
 

src/app/public/ngx-gist-theme.service.ts

@@ -6,27 +6,63 @@ export class NgxGistThemeService {
   public constructor(@Inject(DOCUMENT) private readonly document: Document) {}
 
   private importElMaterialTheme: HTMLLinkElement | null = null;
+  private importElHljsTheme: HTMLLinkElement | null = null;
 
-  public setTheme(materialPrebuiltTheme: MaterialPrebuiltTheme): void {
-    const themeId = 'material-theme-import';
-    const currentEl = this.document.getElementById(themeId);
-
-    if (currentEl) {
-      this.document.removeChild(currentEl);
+  public setTheme({
+    materialTheme,
+    hilightJsTheme,
+  }: {
+    materialTheme?: MaterialPrebuiltTheme;
+    hilightJsTheme?: HighlightJsTheme;
+  } = {}): void {
+    if (!materialTheme && !hilightJsTheme) {
+      throw new Error('You must provide a theme.');
     }
 
-    if (this.importElMaterialTheme) {
-      this.document.removeChild(this.importElMaterialTheme);
-    }
+    const materialThemeId = 'material-theme-import';
+    const hljsThemeId = 'hljs-theme-import';
 
-    this.importElMaterialTheme = this.document.createElement('link');
-    this.importElMaterialTheme.href = `https://unpkg.com/@angular/[email protected]/prebuilt-themes/${materialPrebuiltTheme}.css`;
-    this.importElMaterialTheme.media = 'screen,print';
-    this.importElMaterialTheme.rel = 'stylesheet';
-    this.importElMaterialTheme.type = 'text/css';
-    this.importElMaterialTheme.id = themeId;
+    const materialThemeLinkEl = this.document.getElementById(materialThemeId);
+    if (materialThemeLinkEl && !hilightJsTheme) {
+      // Material theme aleady exists, return.
+      return;
+    }
 
-    this.document.head.appendChild(this.importElMaterialTheme);
+    const hljsThemeLinkEl = this.document.getElementById(hljsThemeId);
+    if (hljsThemeLinkEl && hilightJsTheme === 'default' && !materialTheme) {
+      // Default theme already in use, return.
+      console.log('returned');
+      return;
+    } else if (
+      hljsThemeLinkEl &&
+      hilightJsTheme !== 'default' &&
+      !materialTheme
+    ) {
+      // Override previously used theme, but remove it first.
+      console.log('remove');
+      this.document.head.removeChild(hljsThemeLinkEl);
+    }
+    console.log('info: ', materialTheme, hilightJsTheme);
+    if (materialTheme) {
+      // !!! Update version when needed.
+      const version = '14.1.0';
+      const url = `@angular/material@${version}/prebuilt-themes/${materialTheme}.css`;
+      this.importElMaterialTheme = this.document.createElement('link');
+      this.importElMaterialTheme.href = `https://unpkg.com/${url}`;
+      this.importElMaterialTheme.rel = 'stylesheet';
+      this.importElMaterialTheme.id = materialThemeId;
+      this.document.head.appendChild(this.importElMaterialTheme);
+    } else if (hilightJsTheme) {
+      console.log('apply', hilightJsTheme);
+      // !!! Update version when needed.
+      const version = '11.6.0';
+      const url = `highlight.js@${version}/styles/${hilightJsTheme}.css`;
+      this.importElHljsTheme = this.document.createElement('link');
+      this.importElHljsTheme.href = `https://unpkg.com/${url}`;
+      this.importElHljsTheme.rel = 'stylesheet';
+      this.importElHljsTheme.id = hljsThemeId;
+      this.document.head.appendChild(this.importElHljsTheme);
+    }
   }
 }
 
@@ -35,3 +71,77 @@ export type MaterialPrebuiltTheme =
   | 'indigo-pink'
   | 'pink-bluegrey'
   | 'purple-green';
+
+export type HighlightJsTheme =
+  | 'a11y-dark'
+  | 'a11y-light'
+  | 'agate'
+  | 'androidstudio'
+  | 'an-old-hope'
+  | 'arduino-light'
+  | 'arta'
+  | 'ascetic'
+  | 'atom-one-dark'
+  | 'atom-one-dark-reasonable'
+  | 'atom-one-light'
+  | 'brown-paper'
+  | 'codepen-embed'
+  | 'color-brewer'
+  | 'dark'
+  | 'default'
+  | 'devibeans'
+  | 'docco'
+  | 'far'
+  | 'felipec'
+  | 'foundation'
+  | 'github'
+  | 'github-dark'
+  | 'github-dark-dimmed'
+  | 'gml'
+  | 'googlecode'
+  | 'gradient-dark'
+  | 'gradient-light'
+  | 'grayscale'
+  | 'hybrid'
+  | 'idea'
+  | 'intellij-light'
+  | 'ir-black'
+  | 'isbl-editor-dark'
+  | 'isbl-editor-light'
+  | 'kimbie-dark'
+  | 'kimbie-light'
+  | 'lightfair'
+  | 'lioshi'
+  | 'magula'
+  | 'mono-blue'
+  | 'monokai'
+  | 'monokai-sublime'
+  | 'night-owl'
+  | 'nnfx-dark'
+  | 'nnfx-light'
+  | 'nord'
+  | 'obsidian'
+  | 'panda-syntax-dark'
+  | 'panda-syntax-light'
+  | 'paraiso-dark'
+  | 'paraiso-light'
+  | 'pojoaque'
+  | 'purebasic'
+  | 'qtcreator-dark'
+  | 'qtcreator-light'
+  | 'rainbow'
+  | 'routeros'
+  | 'school-book'
+  | 'shades-of-purple'
+  | 'srcery'
+  | 'stackoverflow-dark'
+  | 'stackoverflow-light'
+  | 'sunburst'
+  | 'tokyo-night-dark'
+  | 'tokyo-night-light'
+  | 'tomorrow-night-blue'
+  | 'tomorrow-night-bright'
+  | 'vs'
+  | 'vs2015'
+  | 'xcode'
+  | 'xt256';

src/app/public/ngx-gist.component.ts

@@ -2,13 +2,13 @@ import { NgxGistService } from './ngx-gist.service';
 import { isNonEmptyValue } from './ngx-gist.utilities';
 import { NgxGist } from './ngx-gist.model';
 import { Component, Inject, Input, OnInit } from '@angular/core';
-import { Language } from 'highlight.js';
 import { BehaviorSubject, filter, firstValueFrom, ReplaySubject } from 'rxjs';
 import { UntilDestroy, untilDestroyed } from '@ngneat/until-destroy';
 import { DOCUMENT } from '@angular/common';
 import { NgxGistLineNumbersService } from './ngx-gist-line-numbers.service';
 import { DomSanitizer, SafeHtml } from '@angular/platform-browser';
 import {
+  HighlightJsTheme,
   MaterialPrebuiltTheme,
   NgxGistThemeService,
 } from './ngx-gist-theme.service';
@@ -27,7 +27,7 @@ import {
           [label]="file.filename"
         >
           <pre>
-            <code 
+            <code
               *ngIf="applyLineNumbers(file.highlightedContent) as content"
               [innerHTML]="content"
             ></code>
@@ -57,14 +57,10 @@ export class NgxGistComponent implements OnInit {
   public constructor(
     @Inject(DOCUMENT) private readonly document: Document,
     private readonly domSanitizer: DomSanitizer,
-    private readonly ngxGistService: NgxGistService,
     private readonly ngxGistLineNumbersService: NgxGistLineNumbersService,
+    private readonly ngxGistService: NgxGistService,
     private readonly ngxGistThemeService: NgxGistThemeService,
   ) {}
-
-  // TODO: Apply HighlightJs code theme.
-  // @Input() public codeTheme?: unknown;
-
   /**
    * Display in the DOM only the selected filename(s) from the gists files array.
    *
@@ -115,15 +111,14 @@ export class NgxGistComponent implements OnInit {
   >(1);
   public readonly gistIdChanges = this.gistIdSubject.asObservable();
   /**
-   * When defined, override automatic language detection [and styling] and
-   * treat all gists as this lanuage.
+   * The `highlight.js` code theme to use and display.
    *
-   * Default: `undefined`
+   * Default: `'default'`
    *
-   * Tip: See supported language strings here:
-   * https://github.com/highlightjs/highlight.js/blob/main/SUPPORTED_LANGUAGES.md
+   * Note: Only _one_ theme can be loaded on a single page at a time! The first
+   * theme to load will apply to all gists on the page.
    */
-  @Input() public languageName?: Language['name'];
+  @Input() public codeTheme: HighlightJsTheme = 'default';
   /**
    * Define a material core theme to apply. Ideally, you should already have
    * your global material theme set at the root of your project so try to
@@ -153,12 +148,16 @@ export class NgxGistComponent implements OnInit {
   @Input() public useCache = true;
 
   public async ngOnInit(): Promise<void> {
-    this.setTheme();
+    // Load themes
+    this.setMaterialTheme();
+    this.setHljsTheme();
 
+    // Load line numbers
     if (this.showLineNumbers) {
       await this.ngxGistLineNumbersService.load();
     }
 
+    // Load gist(s) async
     this.gistIdChanges
       .pipe(filter(isNonEmptyValue), untilDestroyed(this))
       .subscribe(async (gistId) => {
@@ -189,11 +188,18 @@ export class NgxGistComponent implements OnInit {
     }
   }
 
-  private setTheme(): void {
+  private setHljsTheme(): void {
+    if (!this.codeTheme) {
+      return;
+    }
+    this.ngxGistThemeService.setTheme({ hilightJsTheme: this.codeTheme });
+  }
+
+  private setMaterialTheme(): void {
     if (!this.materialTheme) {
       return;
     }
-    this.ngxGistThemeService.setTheme(this.materialTheme);
+    this.ngxGistThemeService.setTheme({ materialTheme: this.materialTheme });
   }
 
   public applyLineNumbers(highlightedConent: string): SafeHtml | null {

src/app/public/public.ts

@@ -1,5 +1,9 @@
 /** Public API Exports for Node Package */
 
+export {
+  HighlightJsTheme,
+  MaterialPrebuiltTheme,
+} from './ngx-gist-theme.service';
 export * from './ngx-gist.component';
 export * from './ngx-gist.model';
 export * from './ngx-gist.module';

src/styles.scss

@@ -17,3 +17,5 @@ body {
   margin: 0;
   background-color: #faf9f6;
 }
+
+@import "~highlight.js/styles/github.css";