Shuery
8a0924330a
整个 TUI 的地基：位置、对齐、边框都靠它。而它算错了**不会报错** —— 表现只是菜单右边框歪一点、光标偏一列，所以每条边界都在断言里钉住。 为什么必须自己算：.Length 是 UTF-16 code unit 的个数（汉字 1 个 char、2 列）；而 $Host.UI.RawUI.LengthInBufferCells 在 PowerShell 7 上对、在 5.1 上错（实测 中文 返回 2、字体边框字符 返回 6），且不抛错 —— 这种"一边对一边错"的 API 比两边都错更危险。 表里三个边界是实测踩过的：半角片假名 U+FF61–FF9F 是 1 列（不能划进全角区）；全角拉丁 U+FF00–FF60 是 2 列；emoji 是代理对，按一个码点算。 验收：断言 8 条（含空串与控制字符）；test.ps1 9/9 全绿（5.1 与 7）。
59 lines
4.8 KiB
PowerShell
59 lines
4.8 KiB
PowerShell
$outFile = $args[0]
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if (-not $outFile) { $outFile = Join-Path $env:TEMP 'noconsole-probe.txt' }
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$lines = New-Object System.Collections.Generic.List[string]
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function L($s) { $lines.Add($s); Write-Host $s }
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$src = @"
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using System;
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using System.Runtime.InteropServices;
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public static class K32b {
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[DllImport("kernel32.dll", SetLastError=true)] public static extern bool AllocConsole();
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[DllImport("kernel32.dll", SetLastError=true)] public static extern bool FreeConsole();
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[DllImport("kernel32.dll")] public static extern IntPtr GetStdHandle(int n);
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[DllImport("kernel32.dll", SetLastError=true)] public static extern bool GetConsoleMode(IntPtr h, out uint m);
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[DllImport("kernel32.dll", SetLastError=true)] public static extern bool SetConsoleMode(IntPtr h, uint m);
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[DllImport("kernel32.dll")] public static extern IntPtr GetConsoleWindow();
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[DllImport("kernel32.dll")] public static extern uint GetConsoleOutputCP();
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}
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"@
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Add-Type -TypeDefinition $src -ErrorAction Stop
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L "##### PART A: no console attached (stdout redirected) #####"
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L ("PSVersion : " + $PSVersionTable.PSVersion)
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L ("IsOutputRedirected : " + [Console]::IsOutputRedirected)
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L ("GetConsoleWindow : 0x{0:X}" -f ([K32b]::GetConsoleWindow().ToInt64()))
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L ("Host.UI.SupportsVirtualTerminal (property exists? " + [bool]($Host.UI | Get-Member -Name SupportsVirtualTerminal -ErrorAction SilentlyContinue) + ") = " + [string]$Host.UI.SupportsVirtualTerminal)
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L ("RawUI has SupportsVirtualTerminal? " + [bool]($Host.UI.RawUI | Get-Member -Name SupportsVirtualTerminal -ErrorAction SilentlyContinue))
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$m = 0; $ok = [K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m); $err = [Runtime.InteropServices.Marshal]::GetLastWin32Error()
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L ("GetConsoleMode(STDOUT) : $ok mode=0x{0:X} lastErr=$err" -f $m)
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L ("--- try to wrap POSIX bytes (what Set-Item Function:Write-Output would do) ---")
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try { $b = [System.Text.Encoding]::UTF8.GetBytes("x")[0]; $os = [Console]::OpenStandardOutput(); $os.WriteByte(0x1B); $os.Flush(); L "OpenStandardOutput().WriteByte(0x1B): OK (wrote raw ESC into redirected stdout)" } catch { L ("OpenStandardOutput().WriteByte THREW: " + $_.Exception.Message) }
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try { [Console]::SetCursorPosition(3,3); L ("[Console]::SetCursorPosition(3,3) : OK -> " + [Console]::CursorLeft + "," + [Console]::CursorTop) } catch { L ("[Console]::SetCursorPosition(3,3) THREW: " + $_.Exception.Message) }
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try { $w = $Host.UI.RawUI.WindowSize; L ("RawUI.WindowSize : " + $w.Width + 'x' + $w.Height) } catch { L ("RawUI.WindowSize THREW: " + $_.Exception.Message) }
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try { L ("RawUI.ForegroundColor : " + [string]$Host.UI.RawUI.ForegroundColor) } catch { L ("RawUI.ForegroundColor THREW: " + $_.Exception.Message) }
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try { [Console]::ForegroundColor = 'Red'; L ("[Console]::ForegroundColor setter : OK (no throw)") } catch { L ("[Console]::ForegroundColor setter THREW: " + $_.Exception.Message) }
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try { [Console]::Title = 'probe'; L "[Console]::Title setter : OK (no throw)" } catch { L ("[Console]::Title setter THREW: " + $_.Exception.Message) }
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L ("[Console]::OutputEncoding : " + [Console]::OutputEncoding.WebName + " (CodePage " + [Console]::OutputEncoding.CodePage + ")")
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L ("`$OutputEncoding : " + $OutputEncoding.WebName)
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L ("chcp (GetConsoleOutputCP) : " + [K32b]::GetConsoleOutputCP())
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try { L ("`$TypingCompletion / TabExpansion2 n/a") } catch {}
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L ""
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L "##### PART B: AllocConsole() -- now attached to a brand new console #####"
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$alloc = [K32b]::AllocConsole()
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L ("AllocConsole() returned : " + $alloc)
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[Console]::SetOut([System.IO.StreamWriter]::new([Console]::OpenStandardOutput(), [Console]::OutputEncoding)) 2>$null
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L ("GetConsoleWindow : 0x{0:X}" -f ([K32b]::GetConsoleWindow().ToInt64()))
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$m2 = 0; $ok2 = [K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m2)
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L ("GetConsoleMode(STDOUT) : $ok2 mode=0x{0:X}" -f $m2)
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L (" ENABLE_VIRTUAL_TERMINAL_PROCESSING (0x4) : " + (($m2 -band 4) -eq 4))
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L (" ENABLE_PROCESSED_OUTPUT (0x1) : " + (($m2 -band 1) -eq 1))
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$ok3 = [K32b]::SetConsoleMode([K32b]::GetStdHandle(-11), $m2 -band (-bnot 4))
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$m3 = 0; [void][K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m3)
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L ("After SetConsoleMode(mode AND NOT 0x4) -> " + $ok3 + " mode=0x{0:X}" -f $m3)
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L (" VT now off? " + ((($m3 -band 4) -eq 0)))
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[void][K32b]::SetConsoleMode([K32b]::GetStdHandle(-11), $m3 -bor 4)
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$m4 = 0; [void][K32b]::GetConsoleMode([K32b]::GetStdHandle(-11), [ref]$m4)
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L ("After re-enabling 0x4 -> mode=0x{0:X}" -f $m4)
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L ("GetConsoleOutputCP now : " + [K32b]::GetConsoleOutputCP())
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try { L ("RawUI.WindowSize now : " + $Host.UI.RawUI.WindowSize.Width + 'x' + $Host.UI.RawUI.WindowSize.Height) } catch { L ("RawUI.WindowSize THREW: " + $_.Exception.Message) }
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[System.IO.File]::WriteAllLines($outFile, $lines, (New-Object System.Text.UTF8Encoding($false)))
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[void][K32b]::FreeConsole()
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