From 4a1d52382a742efeb2921737b43abaa8498891cb Mon Sep 17 00:00:00 2001
From: sumeyye <sum.the.developer@gmail.com>
Date: Fri, 13 Feb 2026 16:09:13 +0300
Subject: [PATCH] add: `THEME_CHANGE_TOKEN` implementation

---
 .../toast-ui/toastui-editor.component.ts      | 41 ++++++++++++++++++-
 .../theme-shared/src/lib/tokens/index.ts      |  1 +
 .../src/lib/tokens/theme-change.token.ts      |  6 +++
 3 files changed, 46 insertions(+), 2 deletions(-)
 create mode 100644 npm/ng-packs/packages/theme-shared/src/lib/tokens/theme-change.token.ts

diff --git a/npm/ng-packs/packages/cms-kit/src/components/toast-ui/toastui-editor.component.ts b/npm/ng-packs/packages/cms-kit/src/components/toast-ui/toastui-editor.component.ts
index b07ababe23..f9a6aa5469 100644
--- a/npm/ng-packs/packages/cms-kit/src/components/toast-ui/toastui-editor.component.ts
+++ b/npm/ng-packs/packages/cms-kit/src/components/toast-ui/toastui-editor.component.ts
@@ -1,5 +1,6 @@
 import { isPlatformBrowser } from '@angular/common';
 import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import {
   Component,
   AfterViewInit,
@@ -8,10 +9,12 @@ import {
   forwardRef,
   inject,
   PLATFORM_ID,
+  DestroyRef,
 } from '@angular/core';
 import Editor from '@toast-ui/editor';
 
 import { AbpLocalStorageService } from '@abp/ng.core';
+import { THEME_CHANGE_TOKEN } from '@abp/ng.theme.shared';
 
 @Component({
   selector: 'abp-toastui-editor',
@@ -33,6 +36,8 @@ export class ToastuiEditorComponent implements AfterViewInit, ControlValueAccess
 
   private platformId = inject(PLATFORM_ID);
   private localStorageService = inject(AbpLocalStorageService);
+  private destroyRef = inject(DestroyRef);
+  private themeChange$ = inject(THEME_CHANGE_TOKEN, { optional: true });
 
   private onChange: (value: string) => void = () => {};
   private onTouched: () => void = () => {};
@@ -58,8 +63,9 @@ export class ToastuiEditorComponent implements AfterViewInit, ControlValueAccess
     }
 
     this.initializeEditor();
-    // TODO: Revise this approach on lepton side :: Service injection through DI
-    // this.setupThemeListener();
+    if (this.themeChange$) {
+      this.setupThemeListener();
+    }
   }
 
   private getTheme(): string {
@@ -81,4 +87,35 @@ export class ToastuiEditorComponent implements AfterViewInit, ControlValueAccess
       this.onChange(value);
     });
   }
+
+  private setupThemeListener(): void {
+    this.themeChange$!.pipe(takeUntilDestroyed(this.destroyRef)).subscribe(style => {
+      if (!this.editor) {
+        return;
+      }
+      const wrapper =
+        this.editorContainer.nativeElement.querySelector('.toastui-editor-defaultUI') ??
+        this.editorContainer.nativeElement;
+
+      const { styleName } = style;
+
+      switch (styleName) {
+        case 'dark':
+          wrapper.classList.add('toastui-editor-dark');
+          break;
+        case 'system':
+          const isSystemDark =
+            typeof window !== 'undefined' &&
+            window.matchMedia('(prefers-color-scheme: dark)').matches;
+          if (!isSystemDark) {
+            wrapper.classList.remove('toastui-editor-dark');
+          } else {
+            wrapper.classList.add('toastui-editor-dark');
+          }
+          break;
+        default:
+          wrapper.classList.remove('toastui-editor-dark');
+      }
+    });
+  }
 }
diff --git a/npm/ng-packs/packages/theme-shared/src/lib/tokens/index.ts b/npm/ng-packs/packages/theme-shared/src/lib/tokens/index.ts
index fc60386b7d..97bccdebb5 100644
--- a/npm/ng-packs/packages/theme-shared/src/lib/tokens/index.ts
+++ b/npm/ng-packs/packages/theme-shared/src/lib/tokens/index.ts
@@ -4,3 +4,4 @@ export * from './ngx-datatable-messages.token';
 export * from './suppress-unsaved-changes-warning.token';
 export * from './confirmation-icons.token';
 export * from './logo.token';
+export * from './theme-change.token';
diff --git a/npm/ng-packs/packages/theme-shared/src/lib/tokens/theme-change.token.ts b/npm/ng-packs/packages/theme-shared/src/lib/tokens/theme-change.token.ts
new file mode 100644
index 0000000000..e527dff1bc
--- /dev/null
+++ b/npm/ng-packs/packages/theme-shared/src/lib/tokens/theme-change.token.ts
@@ -0,0 +1,6 @@
+import { InjectionToken } from '@angular/core';
+import { Observable } from 'rxjs';
+
+export const THEME_CHANGE_TOKEN = new InjectionToken<Observable<{ styleName: string }>>(
+  'THEME_CHANGE_TOKEN',
+);