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 $Host.UI.RawUI.LengthInBufferCells 在 PowerShell 7 上对、在 5.1 上错（实测 中文 返回 2、字体边框字符 返回 6），且不抛错 —— 这种"一边对一边错"的 API 比两边都错更危险。 表里三个边界是实测踩过的：半角片假名 U+FF61–FF9F 是 1 列（不能划进全角区）；全角拉丁 U+FF00–FF60 是 2 列；emoji 是代理对，按一个码点算。 验收：断言 8 条（含空串与控制字符）；test.ps1 9/9 全绿（5.1 与 7）。
56 lines
3.0 KiB
PowerShell
56 lines
3.0 KiB
PowerShell
param([Parameter(Mandatory=$true)][string]$OutFile)
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$lines = New-Object System.Collections.Generic.List[string]
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function L($s) { $lines.Add($s) }
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function MK([int[]]$cp) { -join ($cp | ForEach-Object { [char]$_ }) }
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$raw = $Host.UI.RawUI
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$cases = @(
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,@('8 ASCII ', 'A1b2C3d4')
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,@('2 CJK ', (MK @(0x4E2D, 0x6587)))
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,@('4 CJK ', (MK @(0x4E2D, 0x6587, 0x5907, 0x4EFD)))
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,@('3 boxdraw ', (MK @(0x250C, 0x2500, 0x2510)))
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,@('1 emoji ', [char]::ConvertFromUtf32(0x1F600))
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,@('2 fullwidth', (MK @(0xFF21, 0xFF22)))
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,@('2 halfkata ', (MK @(0xFF71, 0xFF72)))
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,@('CJK+colon ', (MK @(0x4E2D, 0x6587, 0xFF1A, 0x0020)) + 'X')
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,@('punctuation', (MK @(0x3002, 0x3001, 0xFF0C)))
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,@('hangul ', (MK @(0xD55C, 0xAE00)))
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,@('kana ', (MK @(0x3042, 0x3044)))
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,@('cyrillic ', (MK @(0x0416, 0x0418)))
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,@('accented ', (MK @(0x00E9, 0x00E8)))
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,@('tabs+ctrl ', "a`tb")
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)
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L ("PSVersion: " + $PSVersionTable.PSVersion + " PSEdition: " + $PSVersionTable.PSEdition)
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L ("IsOutputRedirected: " + [Console]::IsOutputRedirected)
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L ""
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L "### `$Host.UI.RawUI.LengthInBufferCells() -- BUILT-IN cell-width API ###"
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L (" method present? " + [bool]($raw | Get-Member -Name LengthInBufferCells -MemberType Method))
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$mi = $raw | Get-Member -Name LengthInBufferCells -MemberType Method
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if ($mi) { foreach ($d in $mi) { L (" overload: " + $d.Definition) } }
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L ""
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L " {0,-12} {1,8} {2,14} {3,10}" -f 'case', '.Length', 'LengthInBuffer', 'expected~'
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foreach ($c in $cases) {
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$nm = $c[0]; $s = [string]$c[1]
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$w = 'n/a'
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try { $w = $raw.LengthInBufferCells($s) } catch { $w = 'THREW: ' + $_.Exception.Message }
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L (" {0,-12} {1,8} {2,14} {3,10}" -f $nm, $s.Length, $w, '')
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}
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L ""
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L "### per-character version: LengthInBufferCells(char, offset) ###"
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foreach ($c in $cases) {
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$nm = $c[0]; $s = [string]$c[1]
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$sum = 0; $eb = ''
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foreach ($ch in $s.ToCharArray()) {
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try { $u = $raw.LengthInBufferCells($ch); $eb += $u } catch { $eb += '?'; $sum = -999 }
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}
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L (" {0,-12} sum(char overload)={1} perchar={2}" -f $nm, $sum, $eb)
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}
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L ""
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L "### Other RawUI helpers that exist in BOTH hosts ###"
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L (" NewBufferCellArray overloads: " + (((($raw | Get-Member -Name NewBufferCellArray -MemberType Method).Definition) -join ' | ')))
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L (" SetBufferContents overloads : " + (((($raw | Get-Member -Name SetBufferContents -MemberType Method).Definition) -join ' | ')))
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L (" GetBufferContents overloads : " + (((($raw | Get-Member -Name GetBufferContents -MemberType Method).Definition) -join ' | ')))
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L (" ScrollBufferContents overloads: " + (((($raw | Get-Member -Name ScrollBufferContents -MemberType Method).Definition) -join ' | ')))
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L (" ReadKey overloads : " + (((($raw | Get-Member -Name ReadKey -MemberType Method).Definition) -join ' | ')))
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L (" FlushInputBuffer overloads : " + (((($raw | Get-Member -Name FlushInputBuffer -MemberType Method).Definition) -join ' | ')))
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[System.IO.File]::WriteAllLines($OutFile, $lines, (New-Object System.Text.UTF8Encoding($false)))
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