StringBuilderオブジェクトにカラーラインを挿入する方法

Question

StringBuilderオブジェクトに色付きの線を追加することはできますか？
Iは、Write-ホストと色を追加する方法を知っている：

StringBuilderと

Write-Host "Line without a color" 
Write-Host "Line with red color" -ForegroundColor Red 

でもない：

$sb = New-Object -TypeName "System.Text.StringBuilder" 
$sb.AppendLine("Line without a color") | Out-Null 
$sb.AppendLine("Line with red color") | Out-Null 
$sb.ToString() 

私は一緒にすべての行を取得し、それらすべてを印刷することを好みます。
StringBuilderは良い方法ですが、色の付いた行もいくつか追加したいと思います。
可能ですか？

この私がStringBuilderを取得したい出力：

私はRTFStringビルダーについて何かhereを読みますが、予想通り、それは私のために動作しませんでした。

Answer 1

回避策：

$sb = New-Object -TypeName "System.Text.StringBuilder" 
$sb.AppendLine("Line without a color") | Out-Null 
$sb.AppendLine("#color:red#Line with red color") | Out-Null 


$delim =@([Environment]::NewLine, "\n") 
$sbLines = $sb.ToString().Split($delim, [System.StringSplitOptions]::None) 
foreach($line in $sbLines){ 


    if($line.StartsWith("#color:red#")){ 
     Write-Host $line.Split("#")[2] -ForegroundColor Red 
    } 
    else{ 
     Write-Host $line 
    } 
} 

より一般的な解決策：

<# 
.SYNOPSIS 
A wrapper around Write-Host that supports selective coloring of 
substrings via embedded coloring specifications. 

.DESCRIPTION 
In addition to accepting a default foreground and background color, 
you can embed one or more color specifications in the string to write, 
using the following syntax: 
#<fgcolor>[:<bgcolor>]#<text># 

<fgcolor> and <bgcolor> must be valid [ConsoleColor] values, such as 'green' or 'white' (case does not matter). 
Everything following the color specification up to the next '#', or impliclitly to the end of the string, 
is written in that color. 

Note that nesting of color specifications is not supported. 
As a corollary, any token that immediately follows a color specification is treated 
as text to write, even if it happens to be a technically valid color spec too. 
This allows you to use, e.g., 'The next word is #green#green#.', without fear 
of having the second '#green' be interpreted as a color specification as well. 

.PARAMETER ForegroundColor 
Specifies the default text color for all text portions 
for which no embedded foreground color is specified. 

.PARAMETER BackgroundColor 
Specifies the default background color for all text portions 
for which no embedded background color is specified. 

.PARAMETER NoNewline 
Output the specified string withpout a trailing newline. 

.NOTES 
While this function is convenient, it will be slow with many embedded colors, because, 
behind the scenes, Write-Host must be called for every colored span. 

.EXAMPLE 
Write-HostColored "#green#Green foreground.# Default colors. #blue:white#Blue on white." 

.EXAMPLE 
'#black#Black on white (by default).#Blue# Blue on white.' | Write-HostColored -BackgroundColor White 

#> 
function Write-HostColored() { 
    [CmdletBinding()] 
    param(
     [parameter(Position=0, ValueFromPipeline=$true)] 
     [string[]] $Text 
     , 
     [switch] $NoNewline 
     , 
     [ConsoleColor] $BackgroundColor = $host.UI.RawUI.BackgroundColor 
     , 
     [ConsoleColor] $ForegroundColor = $host.UI.RawUI.ForegroundColor 
    ) 

    begin { 
     # If text was given as a parameter value, it'll be an array. 
     # Like Write-Host, we flatten the array into a single string 
     # using simple string interpolation (which defaults to separating elements with a space, 
     # which can be changed by setting $OFS). 
     if ($Text -ne $null) { 
      $Text = "$Text" 
     } 
    } 

    process { 
     if ($Text) { 

      # Start with the foreground and background color specified via 
      # -ForegroundColor/-BackgroundColor, or the current defaults. 
      $curFgColor = $ForegroundColor 
      $curBgColor = $BackgroundColor 

      # Split message into tokens by '#'. 
      # A token between to '#' instances is either the name of a color or text to write (in the color set by the previous token). 
      $tokens = $Text.split("#") 

      # Iterate over tokens. 
      $prevWasColorSpec = $false 
      foreach($token in $tokens) { 

       if (-not $prevWasColorSpec -and $token -match '^([a-z]*)(:([a-z]+))?$') { # a potential color spec. 
        # If a token is a color spec, set the color for the next token to write. 
        # Color spec can be a foreground color only (e.g., 'green'), or a foreground-background color pair (e.g., 'green:white'), or just a background color (e.g., ':white') 
        try { 
         $curFgColor = [ConsoleColor] $matches[1] 
         $prevWasColorSpec = $true 
        } catch {} 
        if ($matches[3]) { 
         try { 
          $curBgColor = [ConsoleColor] $matches[3] 
          $prevWasColorSpec = $true 
         } catch {} 
        } 
        if ($prevWasColorSpec) { 
         continue 
        } 
       } 

       $prevWasColorSpec = $false 

       if ($token) { 
        # A text token: write with (with no trailing line break). 
        # !! In the ISE - as opposed to a regular PowerShell console window, 
        # !! $host.UI.RawUI.ForegroundColor and $host.UI.RawUI.ForegroundColor inexcplicably 
        # !! report value -1, which causes an error when passed to Write-Host. 
        # !! Thus, we only specify the -ForegroundColor and -BackgroundColor parameters 
        # !! for values other than -1. 
        # !! Similarly, PowerShell Core terminal windows on *Unix* report -1 too. 
        $argsHash = @{} 
        if ([int] $curFgColor -ne -1) { $argsHash += @{ 'ForegroundColor' = $curFgColor } } 
        if ([int] $curBgColor -ne -1) { $argsHash += @{ 'BackgroundColor' = $curBgColor } } 
        Write-Host -NoNewline @argsHash $token 
       } 

       # Revert to default colors. 
       $curFgColor = $ForegroundColor 
       $curBgColor = $BackgroundColor 

      } 
     } 
     # Terminate with a newline, unless suppressed 
     if (-not $NoNewLine) { write-host } 
    } 
} 


# MAIN 
$sb = New-Object -TypeName "System.Text.StringBuilder" 
$sb.AppendLine("Line without a color") | Out-Null 
$sb.AppendLine("#red#Line with red color") | Out-Null 

$delim =@([Environment]::NewLine, "\n") 
$sbLines = $sb.ToString().Split($delim, [System.StringSplitOptions]::None) 
foreach($line in $sbLines){ 
    Write-HostColored $line 
}