📝 Text Editor

A simple yet feature-rich text editor built with Java Swing, inspired by Windows Notepad.

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🚀 Features

• File Operations — Open, Save, Save As with format selection
• Export Formats — .txt, .java, .md, .html, .xml, .csv, .log, .pdf
• Undo / Redo — Full undo/redo support (Ctrl+Z, Ctrl+Y)
• Find — Normal and Regex search (Ctrl+F)
• Text Formatting — Bold, Italic, Underline toolbar with toggle support
• Font Size — Selectable and typeable font size
• Status Bar — Live character count and save status
• Unsaved Changes — Title shows * indicator and exit prompts to save

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🧩 Design Patterns Used

Pattern	Class(es)	Purpose
Singleton	EditorApp	Single application instance, global access point for Document and CommandManager
Command	CommandManager, OpenFileCommand, SaveFileCommand, SaveAsFileCommand	Encapsulates every action as an object, enables Undo/Redo
Observer	EditorObserver, Document, StatusBar	Automatically updates status bar and title when document changes
Strategy	SearchStrategy, SimpleSearchStrategy, RegexSearchStrategy	Swappable search algorithms (normal vs regex) at runtime
Decorator	TextFormatter, BaseFormatter, BoldDecorator, ItalicDecorator	Dynamically applies text formatting without modifying the base class

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🛠️ Tech Stack

• Language: Java 21
• UI: Java Swing
• Build Tool: Maven
• Testing: JUnit 5
• PDF Export: iText 5

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▶️ How to Run

1. Clone the repository:

git clone https://github.com/lyn4c4ry/TextEditor.git

2. Open the project in IntelliJ IDEA

3. Run Main.java inside editor.app package

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🧪 Running Tests

In IntelliJ, right-click on src/test/java → Run All Tests

Or via Maven:

mvn test

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⌨️ Keyboard Shortcuts

Shortcut	Action
Ctrl+O	Open file
Ctrl+S	Save file
Ctrl+Shift+S	Save As
Ctrl+Z	Undo
Ctrl+Y	Redo
Ctrl+F	Find
Ctrl+B	Bold
Ctrl+I	Italic

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📁 Project Structure

src/
├── main/java/editor/ 
│   ├── app/          → Main, EditorApp (Singleton)
│   ├── model/        → Document
│   ├── command/      → Command interface, CommandManager, all file commands
│   ├── observer/     → EditorObserver interface
│   ├── strategy/     → SearchStrategy, SimpleSearchStrategy, RegexSearchStrategy
│   ├── decorator/    → TextFormatter, BaseFormatter, BoldDecorator, ItalicDecorator
│   └── ui/           → MainFrame, EditorMenuBar, EditorTextArea, EditorToolBar, FindDialog, StatusBar
└── test/java/editor/ → CommandManagerTest, DocumentTest, SearchStrategyTest