requestRectangleChecksum
abstract fun requestRectangleChecksum(requestId: Int, page: Int, top: Int, left: Int, bottom: Int, right: Int)
Enqueues a VT420 DECRQCRA response for an active-page rectangular area.
The compatibility contract accepts page 0 (omitted) and page 1 only. Other pages, malformed rectangles, and out-of-domain requests are silent. The checksum uses the VT420-compatible default algorithm: erased cells and wide spacer cells are omitted; printable base codepoints are reduced to eight bits; and the supported VT100 video attributes are included.
Parameters
requestId
Host-supplied request identifier echoed in the DCS response.
page
DEC page number (0 omitted or 1 active page).
top
One-based top row, or 0 when omitted.
left
One-based left column, or 0 when omitted.
bottom
One-based bottom row, or 0 when omitted.
right
One-based right column, or 0 when omitted.