BellColorTextBox

A lightweight, extensible text-editor control with syntax highlighting and multi-caret support.

BellColorTextBox is a pure-C# library that brings fast, code-friendly editing to any .NET 6+ application.
It ships with an ImGui back-end out of the box, and you can plug in other renderers (e.g., WinForms, WPF, SDL) by implementing a small IBackend interface.

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NuGet Packages

Package	Latest Version
BellColorTextBox.Net
BellColorTextBox.ImGuiNet

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Requirements

Project	Framework / Library
BellColorTextBox.Net	.NET 6.0 or later
BellColorTextBox.ImGuiNet	BellColorTextBox.Net, ImGui.NET (≥ 1.89.7.1)

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Key Features

• Syntax Highlighting — token-based or regex-based, fully themeable
• Multiple Carets & Selections — Ctrl+Click to add cursors, each with independent undo/redo
• Code Folding — hide regions without breaking selections or clipboard ops
• Auto-Indent & Tab Modes — spaces/tabs, overwrite mode, smart EOL handling
• Word Wrap & Read-Only Mode
• Custom Languages — implement ILanguage to add your own highlighter

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Roadmap / To-Do

• Complete documentation site
• Find / Replace / Go to
• Auto-completion & intellisense hooks
• Smart auto-scroll on typing
• Paste handling for multiple carets
• More built-in language grammars

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Core vs. Native Port

Module	Status
BellColorTextBox.Net (C#)	✅ Feature-complete
BellColorTextBox (C++)	⏳ Planned

Built-in Language Definitions

• C#
• JSON
• Protocol Buffers
• SQL

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Rendering Back-Ends

Platform	ImGuiNet (C#)	WinForms (C#)	ImGui (C++)
Windows	✅	⏳	⏳
Linux	⏳	❌	⏳
macOS	⏳	❌	⏳

Legend: ✅ available ⏳ planned ❌ not planned

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Getting Started

dotnet add package BellColorTextBox.ImGuiNet