Regex TUI

A terminal-based application for learning and testing regular expressions with vim-like interface.

Features

• Interactive text input area for your test strings (folds in normal mode to save space)
• Live regex pattern matching with color highlighting
• Real-time highlighting while typing regex or sed commands
• Multiple regex patterns with easy switching, editing, and deletion
• Sed syntax simulation for replacements
• Vim-like normal/insert modes with pane indicators
• Dynamic terminal resizing with minimum size requirements
• Clipboard integration for copying regex patterns
• Error feedback for invalid regex/sed syntax
• Dark theme for better contrast
• Formatted help display for easy reading
• Intuitive keyboard navigation

Usage

1. Run the application: ./regex-tui
2. Start in NORMAL mode (text input folded to save space)
3. Press i to enter INSERT mode for editing (expands input area)
4. Use vim-like keys to navigate and control
5. Toggle sed mode with s for replacement operations
6. The interface automatically adjusts to your terminal size
7. Press d then a number to delete patterns
8. See live feedback in the display area
9. Resize terminal to at least 60x15 for best experience

Controls

Normal Mode

• i / I: Enter insert mode at cursor / end
• a / A: Enter insert mode after cursor / end
• Tab / j / k: Switch between text and regex panes
• 1-9: Select and load pattern 1-9 into input field
• d: Enter delete mode, then press 1-9 to delete pattern
• s: Toggle sed mode
• c: Clear text input
• y: Copy current regex to clipboard
• Enter: Add current regex as new pattern
• Ctrl+C / q: Quit

Insert Mode

• Type to edit text or regex
• Esc: Return to normal mode

Sed Mode

When sed mode is active, the regex input expects sed commands like s/pattern/replace/g. The display shows the result of applying the sed operation to the text.

Building

go build

Dependencies

• Bubble Tea
• Bubbles
• Lipgloss