EDEE Terminal Text Editor v1.0.0

EDEE (Extensible Development Editing Environment) is a lightweight, feature-rich terminal text editor written in Go. It provides a modern editing experience with syntax highlighting, undo/redo functionality, and support for multiple programming languages.

Features

Core Editing

• Multiline text editing with full Unicode support
• Syntax highlighting for Go, Rust, and Python files
• Undo/Redo system with state management (Ctrl+U/Ctrl+Z for undo, Ctrl+Y for redo)
• Line operations including line deletion (Ctrl+X)

User Interface

• Intuitive status bar showing editor state and file information
• Real-time feedback for save operations and errors
• Keyboard shortcuts for common operations

Quick Start

Prerequisites

• Go 1.17 or later
• Unix-like system (Linux, macOS, and WSL/MinGW)

Building

# Build the editor
make build

Running

# Edit an existing file
./bin/edee myfile.txt

# Create a new file
./bin/edee newfile.go

# Start without a file (creates untitled.txt)
./bin/edee

Usage

Basic Editing

1. Navigation: Use arrow keys to move the cursor
2. Text Input: Simply start typing to insert text
3. Save: Press Ctrl+S to save your changes
4. Exit: Press ESC to quit the editor

Advanced Features

Undo/Redo Operations

• Undo: Ctrl+U or Ctrl+Z - Reverts the last change
• Redo: Ctrl+Y - Re-applies the last undone change
• State Management: Up to 100 operations are stored in memory

Line Operations

• Delete Current Line: Ctrl+X - Removes the entire line at cursor position

Key Bindings

Movement

Key	Action
↑ ↓ ← →	Move cursor up/down/left/right
Home	Jump to beginning of current line
End	Jump to end of current line
Page Up	Scroll up one page
Page Down	Scroll down one page

File Operations

Key	Action
Ctrl+S	Save current file
Ctrl+X	Delete current line
Ctrl+U / Ctrl+Z	Undo last operation
Ctrl+Y	Redo last undone operation
ESC	Exit editor

Status Information

The status bar provides real-time feedback:

• [Ready] - File loaded, no unsaved changes
• [Modified] - File has unsaved changes
• [New file] - Editing a newly created file
• [Changes saved] - File saved successfully (10 seconds)
• [Error: message] - Error occurred during save operation (5 seconds)

File Support

Syntax Highlighting

EDEE provides syntax highlighting for:

• Rust files (.rs)
• Go files (.go)
• Python files (.py)

File Encoding

• UTF-8 support with proper Unicode handling
• Multi-byte character awareness for cursor movement
• Automatic validation of file encoding

Project Structure

edee/
├── cmd/
│   └── main.go              # Main application entry point
├── pkg/
│   ├── editor/
│   │   └── editor_test.go   # Unit tests for editor functionality
│   └── fileio/
│       └── fileio.go        # File I/O operations
├── test_samples/            # Sample files for testing
├── Makefile                # Build automation
├── go.mod                  # Go module definition
└── README.md               # This file

Development

Building from Source

# Build the binary
make build

# Run tests
make test

Dependencies

EDEE uses Go standard library and compatible external dependencies:

• termbox-go v1.1.1 - Terminal UI library
• Standard library packages: os, fmt, time, strings, path/filepath

Configuration

Environment Variables

• GO111MODULE=on - Required for proper module resolution
• TERM - Terminal type detection (most terminals work automatically)

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.