caffee 2.3.0

A simple CUI editor for Caffee.

☕ CAFFEE Command Line Text Editor

🇯🇵 日本語版README　 Official Japanese UI Plugin　 Nuitka Compilation Guide　 PATH Setup Guide

CAFFEE is a lightweight terminal text editor written in Python using the curses library. It aims to provide a simple, extensible, and efficient editing experience directly in your terminal with modern IDE-like features.

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✨ What's New in v2.0.0

🎨 Modern UI Enhancements

• Interactive Start Screen - Welcome screen with quick access to settings, plugins, and file explorer
• Tab Bar System - Multi-file editing with visual tab management
• Split Panel Layout - Toggle file explorer and integrated terminal panels
• Enhanced Visual Design - Improved color schemes and status indicators

🚀 Productivity Features

• Integrated File Explorer (Ctrl+F) - Browse and open files without leaving the editor
• Built-in Terminal (Ctrl+T) - Execute commands and run code directly from the editor
• Plugin Manager (Ctrl+P from start screen) - Enable/disable plugins with visual interface
• Build & Run (Ctrl+B) - Automatic compilation and execution for Python, JavaScript, Go, C/C++, Rust, and shell scripts
• Smart Horizontal Scrolling - Nano-style smooth scrolling for long lines
• Full-Width Character Support - Proper handling of Japanese and other wide characters

🎨 Syntax Highlighting

• Python, JavaScript, C/C++, Go, Rust, HTML, Markdown support
• Customizable color schemes via settings

📑 Multi-Tab Editing

• Ctrl+S - Create new tab or return to start screen
• Ctrl+L - Switch to next tab
• Ctrl+X - Close current tab (prompts if unsaved)

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💡 Core Features

• Small and focused editing experience
• Undo/Redo history with configurable limit
• Mark-based selection and clipboard operations (cut/copy/paste)
• Line operations (delete, comment/uncomment, goto)
• Atomic file saving with automatic backup creation
• Plugin system for extensibility
• JSON configuration for customization

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💻 Installation

Requirements

• Python 3.6+
• Unix-like terminal (Linux, macOS, ChromeOS Linux shell)
• curses library (usually included with Python)

Quick Start

# Download or clone the repository
git clone <repository-url>
cd CAFFEE_Editor

# Run directly
python3 caffee.py

# Or open a specific file
python3 caffee.py /path/to/file.py

Optional: Speed Up with Nuitka

For significantly faster startup and execution, compile with Nuitka (Debian/Ubuntu):

python3 -m venv myenv
source myenv/bin/activate
pip install nuitka
sudo apt install patchelf
python -m nuitka --standalone caffee.py
cd caffee.dist
./caffee.bin

See Nuitka_Step.md for detailed instructions and troubleshooting.

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⌨️ Keybindings

File Operations

Key	Action
Ctrl+O	Save current file
Ctrl+X	Close current tab / Exit
Ctrl+S	New tab / Start screen
Ctrl+L	Switch to next tab

Editing

Key	Action
Ctrl+Z	Undo
Ctrl+R	Redo
Ctrl+K	Cut (line or selection)
Ctrl+U	Paste
Ctrl+C	Copy selection
Ctrl+Y	Delete current line
Ctrl+/	Toggle comment

Navigation & Search

Key	Action
Ctrl+W	Search (with regex support)
Ctrl+G	Go to line number
Ctrl+E	Move to end of line
Ctrl+A	Select all / Clear selection
Ctrl+6	Set/Unset mark (selection start)
Arrow Keys	Navigate cursor
PageUp/Down	Scroll by page

Panels & Tools

Key	Action
Ctrl+F	Toggle file explorer
Ctrl+T	Toggle integrated terminal
Ctrl+B	Build/Run current file
Ctrl+P	Plugin manager (from start screen)
Esc	Return to editor from panels

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⚙️ Configuration

User settings are stored in ~/.caffee_setting/setting.json.

Example Configuration

{
  "tab_width": 4,
  "history_limit": 50,
  "use_soft_tabs": true,
  "backup_subdir": "backup",
  "backup_count": 5,
  
  "show_splash": true,
  "splash_duration": 500,
  "start_screen_mode": true,
  
  "explorer_width": 35,
  "terminal_height": 10,
  "show_explorer_default": false,
  "show_terminal_default": false,
  
  "colors": {
    "header_text": "BLACK",
    "header_bg": "WHITE",
    "error_text": "WHITE",
    "error_bg": "RED",
    "linenum_text": "CYAN",
    "linenum_bg": "DEFAULT",
    "selection_text": "BLACK",
    "selection_bg": "CYAN",
    "keyword": "YELLOW",
    "string": "GREEN",
    "comment": "MAGENTA",
    "number": "BLUE",
    "ui_border": "WHITE",
    "tab_active_bg": "BLUE"
  }
}

Configuration Options

• Editor Settings: tab_width, history_limit, use_soft_tabs
• Backup: backup_subdir, backup_count (automatic versioned backups)
• Startup: show_splash, splash_duration, start_screen_mode
• Layout: explorer_width, terminal_height, panel visibility defaults
• Colors: Comprehensive color customization for all UI elements

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🧩 Plugin System

Plugins are Python files in ~/.caffee_setting/plugins/.

Plugin API

Plugins can expose an init(editor) function with access to:

• Cursor & Buffer Access: get_cursor_position(), get_line_content(), get_buffer_lines()
• Editing Operations: insert_text_at_cursor(), delete_range(), replace_text()
• Selection: get_selection_text(), get_selection_range()
• Key Binding: bind_key(key_code, function)
• UI Feedback: set_status_message(), redraw_screen()
• User Input: prompt_user(message, default="")

Example Plugin

def init(editor):
    def uppercase_selection(ed):
        text = ed.get_selection_text()
        if text:
            lines = [line.upper() for line in text]
            # Process selection...
            ed.set_status_message("Converted to uppercase!")
        else:
            ed.set_status_message("No selection")
    
    # Bind to Ctrl+Shift+U (if terminal supports)
    editor.bind_key(21, uppercase_selection)

Plugin Manager

Access via Ctrl+P from the start screen:

• View all installed plugins
• Enable/disable plugins with spacebar
• Changes take effect after editor restart

Disabled plugins are moved to ~/.caffee_setting/plugins/disabled/.

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🚀 Built-in Commands

CAFFEE automatically detects file types and provides build/run commands:

File Type	Command
.py	python3 <file>
.js	node <file>
.go	go run <file>
.c	gcc <file> -o <output> && ./<output>
.cpp, .cc	g++ <file> -o <output> && ./<output>
.sh	bash <file>
.rs	rustc <file> && ./<output>

Press Ctrl+B to save and run the current file. Output appears in the integrated terminal.

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🛠️ Troubleshooting

Display Issues

• Japanese text garbled? See Nuitka_Step.md for locale configuration
• Colors not working? Ensure your terminal supports 256 colors
• Curses errors? Verify Python's curses library is available on your platform

File Operations

• File changed on disk: CAFFEE detects external changes but won't auto-reload to prevent data loss
• Backup files: Located in ~/.caffee_setting/backup/ with timestamps

Terminal Integration

• Terminal not working? The integrated terminal requires pty support (Unix-like systems only)
• Build command fails? Ensure required compilers/interpreters are in your PATH

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🤝 Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch
3. Make focused, well-documented changes
4. Test in multiple terminal environments
5. Submit a pull request with clear descriptions

Development Guidelines

• Maintain compatibility with Python 3.6+
• Respect terminal resizing behavior
• Keep the codebase simple and readable
• Follow existing code style

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📄 License

MIT License - See LICENSE file for details.

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🙏 Acknowledgments

Built with Python's curses library. Inspired by nano, vim, and modern code editors.

CAFFEE - Brew your code in the terminal ☕