# LaTeX to Notion

A Chrome extension that automatically converts LaTeX equations to Notion's native math blocks.

## Features

- **Auto-convert on paste** — Paste LaTeX from anywhere (ChatGPT, Overleaf, papers) and it converts automatically
- **Multiple format support** — `$$...$$`, `$...$`, `\[...\]`, `\(...\)`, `\begin{equation}`, `\begin{align}`, `\begin{gather}`, `\begin{cases}`, `\begin{aligned}`
- **Undo support** — Revert the last conversion with Ctrl+Shift+Z
- **Hover-to-convert** — Hover over LaTeX to see a quick convert button
- **Error detection** — Alerts for KaTeX parse errors
- **Keyboard shortcuts** — Quick access without clicking

## Installation

1. Download or clone this repository
2. Open Chrome and navigate to `chrome://extensions/`
3. Enable **Developer mode** (top right)
4. Click **Load unpacked**
5. Select the extension folder

## Usage

### Auto-Convert (Recommended)

1. Enable **Auto-Convert on Paste** in the popup
2. Copy LaTeX from any source
3. Paste into Notion
4. Equations convert automatically

### Manual Conversion

- **Convert All** — Converts all equations on the page
- **From Clipboard** — Paste and convert clipboard content
- **Undo** — Revert the last conversion

### Hover-to-Convert

1. Enable in Settings
2. Hover over `$...$` or other LaTeX
3. Click the "∑ Convert" button

## Supported Formats

| Format | Type | Example |
|--------|------|---------|
| `$$...$$` | Block | `$$\frac{a}{b}$$` |
| `\[...\]` | Block | `\[\int_0^1 x dx\]` |
| `\begin{equation}` | Block | `\begin{equation} E = mc^2 \end{equation}` |
| `\begin{align}` | Block | `\begin{align} a &= b \\ c &= d \end{align}` |
| `$...$` | Inline | `$E = mc^2$` |
| `\(...\)` | Inline | `\(E = mc^2\)` |

## Keyboard Shortcuts

| Shortcut | Action |
|----------|--------|
| `Ctrl+Shift+M` | Convert all equations |
| `Ctrl+Shift+A` | Toggle auto-convert |
| `Ctrl+Shift+Z` | Undo last conversion |

## How It Works

The extension uses Notion's own UI automation:

1. Detects LaTeX patterns in the DOM
2. Selects the equation text
3. Uses Notion's `/math` slash command
4. Inserts the LaTeX content
5. Closes the math block dialog

This approach ensures compatibility without requiring API access or authentication.

## Settings

- **Auto-Convert on Paste** — Automatic conversion when pasting
- **Hover-to-Convert** — Show conversion button on hover
- **Notifications** — Show toast messages

## Permissions

| Permission | Purpose |
|------------|---------|
| `activeTab` | Access the active Notion tab |
| `scripting` | Inject content script |
| `clipboardRead/Write` | Read/write clipboard |
| `storage` | Save settings |

## Limitations

- Complex equations may need manual adjustment
- Timing depends on Notion's responsiveness
- Undo restores text but may not perfectly recreate math blocks

## License

MIT License — See [LICENSE](LICENSE) for details.

## Contributing

Contributions welcome! Please open an issue or pull request.

## Inspiration

- [noeqtion](https://github.com/voidCounter/noeqtion) — Original approach
- [auto-math.com](https://auto-math.com) — Auto-conversion concept