book-reader plugin added

README.md

@@ -9,6 +9,7 @@ This repository comprises plugins which allow extending the functionality of [ON
 * [ImageEditor](https://github.com/ONLYOFFICE/docspace-plugins/tree/master/image-editor)
 * [PDFConverter](https://github.com/ONLYOFFICE/docspace-plugins/tree/master/pdf-converter)
 * [SpeechToText](https://github.com/ONLYOFFICE/docspace-plugins/tree/master/speech-to-text)
+* [BookReader](https://github.com/ONLYOFFICE/docspace-plugins/tree/master/book-reader)
 
 ## User feedback and support
 

book-reader/CHANGELOG.md

@@ -0,0 +1,7 @@
+# Change Log
+
+## 1.0.0
+
+## Added
+
+- first release

book-reader/README.md

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+# Reader Mode Plugin
+
+## Overview
+
+View EPUB, FB2, and DjVu files in a dedicated two-page spread reader. Supports compressed formats (.fb2.zip, .zip containing supported files).
+
+## How to configure
+
+To start working with the plugin, it is not needed to change the default settings.
+
+In case you want to adjust the plugin settings, go to Settings -> Integration -> Plugins and click on the gear symbol next to the Reader Mode plugin.
+
+## How to use
+
+### Supported formats
+
+The plugin supports the following file formats:
+
+- **.epub** — Electronic Publication (EPUB 2.0/3.0)
+- **.fb2** — FictionBook 2.0
+- **.fb2.zip** — Compressed FictionBook files
+- **.djvu / .djv** — DjVu scanned documents
+- **.zip** — Archives containing EPUB, FB2, or DjVu files
+
+### Opening files
+
+- The plugin is available in the file's context menu (right-click on a file or click the three dots next to it).
+- Select any supported file and choose Reader mode from the context menu.
+- The file will open in a two-page spread view in a modal window.
+
+### Reader interface
+
+The reader displays books in a two-page spread layout (like an open book):
+
+- **Navigation**: Use the ‹ and › buttons at the bottom to move between pages
+- **Progress**: A progress bar shows your position in the book
+- **Page counter**: Displays current page numbers and percentage complete
+
+For DjVu files, scanned pages are rendered as images. For EPUB and FB2 files, text content is displayed with proper formatting.
+
+### ZIP files
+
+The plugin automatically detects book formats inside ZIP archives:
+
+- ZIP containing a single .epub file
+- ZIP containing raw EPUB structure (META-INF/container.xml)
+- ZIP containing a single .fb2 file
+- ZIP containing a single .djvu file
+
+## Technical details
+
+The plugin uses the following open-source libraries:
+
+- [@lingo-reader](https://github.com/hhk-png/lingo-reader) — EPUB and FB2 parsing
+- [djvujs](https://github.com/RussCoder/djvujs) — DjVu document rendering
+- [jszip](https://github.com/Stuk/jszip) — ZIP archive handling
+
+## User feedback and support
+
+To ask questions and share feedback, use **Issues** in this repository. Alternatively, you can contact ONLYOFFICE team via **community.onlyoffice.com** or **feedback.onlyoffice.com**.

book-reader/djvujs-dist.d.ts

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+// Type declarations for djvujs-dist (no official @types package exists)
+declare module "djvujs-dist/library/src/index.js" {
+  interface DjVuPage {
+    getImageData(rotate?: boolean): ImageData;
+  }
+
+  interface DjVuDocument {
+    getPagesQuantity(): number;
+    isBundled(): boolean;
+    getPage(pageNumber: number): Promise<DjVuPage>;
+  }
+
+  interface DjVuDocumentConstructor {
+    new (
+      buffer: ArrayBuffer,
+      options?: { baseUrl?: string; memoryLimit?: number },
+    ): DjVuDocument;
+  }
+
+  interface DjVuStatic {
+    Document: DjVuDocumentConstructor;
+    VERSION: string;
+  }
+
+  const DjVu: DjVuStatic;
+  export default DjVu;
+}