DECRPM: missing permanently set/reset mode responses

[ona-automations]

Problem

requestMode (CSI $ p / CSI ? $ p) returns NOT_RECOGNIZED (Pm=0) for several modes that upstream xterm.js reports as PERMANENTLY_SET (Pm=3) or PERMANENTLY_RESET (Pm=4).

Affected modes:

Mode	Type	Upstream Response	Go Port Response
2 (KAM)	ANSI	PERMANENTLY_RESET (4)	NOT_RECOGNIZED (0)
12 (SRM)	ANSI	PERMANENTLY_SET (3)	NOT_RECOGNIZED (0)
8 (DECARM)	DEC private	PERMANENTLY_SET (3)	NOT_RECOGNIZED (0)
67 (DECBKM)	DEC private	PERMANENTLY_RESET (4)	NOT_RECOGNIZED (0)
1005 (UTF-8 mouse)	DEC private	PERMANENTLY_RESET (4)	NOT_RECOGNIZED (0)
1015 (urxvt mouse)	DEC private	PERMANENTLY_RESET (4)	NOT_RECOGNIZED (0)

Reproduction

term := xterm.New(xterm.WithCols(80), xterm.WithRows(24))
defer term.Dispose()
var resp string
term.OnData(func(data string) { resp += data })

// ANSI mode 2 — should respond with Pm=4 (PERMANENTLY_RESET)
term.WriteString("\x1b[2$p")
// Got: "\x1b[2;0$y" (NOT_RECOGNIZED)
// Want: "\x1b[2;4$y" (PERMANENTLY_RESET)

Fix

In inputhandler_csi.go, add cases to ansiModeSetting and privateModeSetting:

// ansiModeSetting
case 2:
    return 4 // PERMANENTLY_RESET
case 12:
    return 3 // PERMANENTLY_SET

// privateModeSetting
case 8:
    return 3 // PERMANENTLY_SET
case 67:
    return 4 // PERMANENTLY_RESET
case 1005:
    return 4 // PERMANENTLY_RESET
case 1015:
    return 4 // PERMANENTLY_RESET

Upstream Reference

• File: src/common/InputHandler.ts, method requestMode, lines 2330–2395
• Commit: 6ba731d73bfbe074e84b57abb62080bed2f4db03