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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
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| import { DOCUMENT } from '@angular/common'; | ||
| import { Inject, Injectable } from '@angular/core'; | ||
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| @Injectable({ providedIn: 'root' }) | ||
| export class ThemeManagerService { | ||
| isDarkMode = false; | ||
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| constructor(@Inject(DOCUMENT) private document: Document) { | ||
| this.isDarkMode = this.#readThemePreference('ngxtools-theme-mode') === 'dark'; | ||
| if (this.isDarkMode) { | ||
| this.#enableDarkTheme(); | ||
| } | ||
| } | ||
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| toggleDarkTheme() { | ||
| if (this.isDarkMode) { | ||
| this.#disableDarkTheme(); | ||
| } else { | ||
| this.#enableDarkTheme(); | ||
| } | ||
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| this.isDarkMode = !this.isDarkMode; | ||
| this.#saveThemePreference('ngxtools-theme-mode', this.isDarkMode); | ||
| } | ||
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| #disableDarkTheme() { | ||
| this.#removeStyle('dark-theme'); | ||
| this.document.body.classList.remove('dark-theme'); | ||
| } | ||
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| #enableDarkTheme() { | ||
| const href = 'dark-theme.css'; | ||
| this.#getLinkElementForKey('dark-theme').setAttribute('href', href); | ||
| this.document.body.classList.add('dark-theme'); | ||
| } | ||
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| #removeStyle(key: string) { | ||
| const existingLinkElement = this.#getExistingLinkElementByKey(key); | ||
| if (existingLinkElement) { | ||
| this.document.head.removeChild(existingLinkElement); | ||
| } | ||
| } | ||
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| #saveThemePreference(key: string, status: boolean) { | ||
| localStorage.setItem(key, status ? 'dark' : 'light'); | ||
| } | ||
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| #readThemePreference(key: string) { | ||
| return localStorage.getItem(key) || 'light'; | ||
| } | ||
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| #getLinkElementForKey(key: string) { | ||
| return this.#getExistingLinkElementByKey(key) || this.#createLinkElementWithKey(key); | ||
| } | ||
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| #getExistingLinkElementByKey(key: string) { | ||
| return this.document.head.querySelector( | ||
| `link[rel="stylesheet"].${this.#getClassNameForKey(key)}` | ||
| ); | ||
| } | ||
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| #createLinkElementWithKey(key: string) { | ||
| const linkEl = this.document.createElement('link'); | ||
| linkEl.setAttribute('rel', 'stylesheet'); | ||
| linkEl.classList.add(this.#getClassNameForKey(key)); | ||
| this.document.head.appendChild(linkEl); | ||
| return linkEl; | ||
| } | ||
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| #getClassNameForKey(key: string) { | ||
| return `theme-${key}`; | ||
| } | ||
| } |
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