PSColorHelper.ps1
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# Helper method for simulating ellipsis function CutString { param ([string]$Message, $length) $len = 0 $count = 0 $max = $length - 3 ForEach ($c in $Message.ToCharArray()) { $len += LengthInBufferCell($c) if ($len -gt $max) { Return $Message.SubString(0, $count) + '...' } $count++ } Return $Message } function LengthInBufferCells { param ([string]$Str) $len = 0 ForEach ($c in $Str.ToCharArray()) { $len += LengthInBufferCell($c) } Return $len } function LengthInBufferCell { param ([char]$Char) # The following is based on https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c # which is derived from https://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt [bool]$isWide = $Char -ge 0x1100 -and ($Char -le 0x115f -or # Hangul Jamo init. consonants $Char -eq 0x2329 -or $Char -eq 0x232a -or ($Char -ge 0x2e80 -and $Char -le 0xa4cf -and $Char -ne 0x303f) -or # CJK ... Yi ($Char -ge 0xac00 -and $Char -le 0xd7a3) -or # Hangul Syllables ($Char -ge 0xf900 -and $Char -le 0xfaff) -or # CJK Compatibility Ideographs ($Char -ge 0xfe10 -and $Char -le 0xfe19) -or # Vertical forms ($Char -ge 0xfe30 -and $Char -le 0xfe6f) -or # CJK Compatibility Forms ($Char -ge 0xff00 -and $Char -le 0xff60) -or # Fullwidth Forms ($Char -ge 0xffe0 -and $Char -le 0xffe6)) # We can ignore these ranges because .Net strings use surrogate pairs # for this range and we do not handle surrogage pairs. # ($Char -ge 0x20000 -and $Char -le 0x2fffd) -or # ($Char -ge 0x30000 -and $Char -le 0x3fffd) if ($isWide) { Return 2 } else { Return 1 } } |