Feature Request: Bracket Paste Mode Support

[KJ7LNW]

Feature Request: Bracket Paste Mode Support

Overview

We would like to use bracket paste mode support in terminal-kit to handle large multi-line paste operations efficiently. Bracket paste mode is a standard terminal feature where pasted content is wrapped in escape sequences:

• Start: \x1b[200~
• Content: (pasted text)
• End: \x1b[201~

Proposed Implementation

We considered the following keymap entry:

term.keymap.PASTE = {
    starter: '\x1b[200~',
    ender: '\x1b[201~',
    accumulate: true,
    handler: (name, content) => ({
        eaten: 0,
        name: 'PASTE',
        data: { content }
    }),
    event: 'key'
}

Problem

The current pattern-matching implementation in Terminal.js (lines 1207-1217) uses a hardcoded character class that only matches ASCII printable characters:

regexp = '^' +
    string.escape.regExp( keymap.starter ) +
    '([ -~]*?)' +    // [ -~] match only all ASCII non-control character
    string.escape.regExp( keymap.ender ) ;

The pattern [ -~]*? matches characters from space (0x20) to tilde (0x7E), which excludes:

• Newlines (\n, 0x0A)
• Carriage returns (\r, 0x0D)
• Tabs (\t, 0x09)
• Other control characters
• Unicode characters outside ASCII range

This prevents bracket paste mode from working with multi-line content or content containing tabs and other
control characters.

Question

@cronvel What would be an appropriate pattern to match content between starter/ender delimiters that includes:

• Newlines and carriage returns
• Tab characters
• Control characters
• Unicode content
• Any character except the ender sequence itself

Would something like (.*?) be acceptable, or is there a reason the current implementation restricts to printable ASCII?

Thank you for maintaining this excellent library.

-Eric