functions/show-ansi.ps1
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Function Show-ANSISequence { [cmdletbinding(DefaultParameterSetName = "basic")] [outputtype([system.string])] Param( [Parameter(ParameterSetName = "basic", HelpMessage = "Display basic ANSI escape sequences. This is the default setting.")] [switch]$Basic, [Parameter(ParameterSetName = "foreback", HelpMessage = "Display foreground ANSI escape sequences")] [switch]$Foreground, [Parameter(ParameterSetName = "foreback", HelpMessage = "Display background ANSI escape sequences")] [switch]$Background, [Parameter(ParameterSetName = "foreback")] [ValidateSet("All", "Simple", "8Bit")] [string]$Type = "All", [Parameter(ParameterSetName = "RGB", HelpMessage = "Specify an array of RGB values between 0 and 255")] [int[]]$RGB, [Parameter(HelpMessage = "Show the value as an unformatted string")] [switch]$AsString ) #default to Basic even if the user doesn't specify the -Basic parameter if ($PSCmdlet.parametersetname -eq 'basic') { $Basic = $True } # a private function to display results in columns on the screen Function display { Param([object]$all, [int]$Max) $c = 1 [string]$row = "" for ($i = 0; $i -le $all.count; $i++) { if ($c -gt $max) { $row $c = 1 $row = "" } else { $row += "$($all[$i]) `t" $c++ } } } if ($IsCoreCLR) { $esc = "`e" $escText = '`e' $max = 3 } else { $esc = $([char]0x1b) $escText = '$([char]0x1b)' $max = 2 } #region basic if ($basic) { Add-Border "Basic Sequences" -ANSIText "$esc[1m" | Write-Host $basichash = @{ 1 = "Bold" 2 = "Faint" 3 = "Italic" 4 = "Underline" 5 = "SlowBlink" 6 = "RapidBlink" 7 = "Reverse" 9 = "CrossedOut" } $basichash.GetEnumerator() | ForEach-Object { $sequence = "$esctext[$($_.name)m$($_.value)$esctext[0m" if ($AsString) { $sequence } else { "$esc[$($_.name)m$sequence$esc[0m" } } } #endregion #region foreground If ($Foreground) { if ($Type -match "All|Simple") { Add-Border "Foreground" -ANSIText "$esc[93m" | Write-Host $n = 30..37 $n += 90..97 $all = $n | ForEach-Object { $sequence = "$esctext[$($_)mHello$esctext[0m" if ($AsString) { $sequence } else { "$esc[$($_)m$sequence$esc[0m" } } display -all $all -Max $max Write-Host "`n" } if ($Type -match "All|8bit") { Add-Border "8-Bit Foreground" -ANSIText "$esc[38;5;10m" | Write-Host $all = 1..255 | ForEach-Object { $sequence = "$esctext[38;5;$($_)mHello$esctext[0m" if ($AsString) { $sequence } else { "$esc[38;5;$($_)m$sequence$esc[0m" } } display -all $all -Max $max } } #endregion #region background If ($Background) { if ($Type -match "All|Simple") { Add-Border "Background" -ANSIText "$esc[46m" | Write-Host $n = 40..47 $n += 100..107 $all = $n | ForEach-Object { $sequence = "$esctext[$($_)mHello$esctext[0m" if ($AsString) { $sequence } else { "$esc[1;$($_)m$sequence$esc[0m" } } display -all $all -Max $max Write-Host "`n" } if ($Type -match "All|8bit") { Add-Border "8-Bit Background" -ANSIText "$esc[7;38;5;10m" | Write-Host $all = 1..255 | ForEach-Object { $sequence = "$esctext[48;5;$($_)mHello$esctext[0m" if ($AsString) { $sequence } else { "$esc[1;48;5;$($_)m$sequence$esc[0m" } } display -all $all -Max $max } } #endregion #region RGB if ($RGB) { if ($rgb.count -ne 3) { Write-Warning "Wrong number of arguments. Specify RED,GREEN and BLUE values" return } $test = $rgb | Where-Object { $_ -gt 255 } if ($test.count -gt 0) { Write-Warning "Detected a value above 255" return $rgb } $r = $rgb[0] $g = $rgb[1] $b = $rgb[2] Write-Host "`r" $sequence = "$esctext[38;2;$r;$g;$($b)m256 Color (R:$r)(G:$g)(B:$b)$esctext[0m" if ($AsString) { $sequence } else { "$esc[38;2;$r;$g;$($b)m$sequence$esc[0m" } } #endregionm #insert a blank line to set off the results Write-Host "`r" } |