Powershell ISE 抽象構文木 プログラミング例

$AbstractSyntaxTree = [System.Management.Automation.Language.Parser]::
ParseInput($psISE.CurrentFile.Editor.Text, [ref]$null, [ref]$null)

$functionsInFile = $AbstractSyntaxTree.FindAll({$args[0] -is
 [System.Management.Automation.Language.FunctionDefinitionAst]}, $true)

#Define some useful global variables
$global:__ISEGoToAddOncurrLine=1
$global:__ISEGoToAddOncurrcol=1
$global:__ISEGoToAddOnlineToGoTo=1
$global:__ISEGoToAddOncolToGoTo=1
#We need two stacks - one each for line and column
$global:__ISEGoToAddOnstackOfLine = New-Object System.Collections.Stack
$global:__ISEGoToAddOnstackOfCol = New-Object System.Collections.
#This script block has the logic for the implementation of the Go-To definition functionality
$global:__ISEGoToAddOnscriptBlockGoTo =
{
$AbstractSyntaxTree = [System.Management.Automation.Language.Parser]::ParseInput($psISE.CurrentFile.Editor.Text, [ref]$null, [ref]$ null)
$functionsInFile = $AbstractSyntaxTree.FindAll(
{$args[0] -is[System.Management.Automation.Language.FunctionDefinitionAst]}, $true)
#Get the text of the line where we have the cursor
$str = $psISE.CurrentFile.Editor.CaretLineText
#Store them on the stack for later use
$global:__ISEGoToAddOnstackOfLine.Push($psISE.CurrentFile.Editor.CaretLine)
$global:__ISEGoToAddOnstackOfCol.Push($psISE.CurrentFile.Editor.CaretColumn)
$global:__ISEGoToAddOncurrLine = $global:__ISEGoToAddOnstackOfLine.Peek()
$global:__ISEGoToAddOncurrcol = $global:__ISEGoToAddOnstackOfCol.Peek()
#Get the selected text so that it can be used for searching existing functions
$selectedFunction = $psISE.CurrentFile.Editor.SelectedText
#Ensure that the cursor is somewhere between the word boundaries of the function
$functionsInFile | %{if(($str.Contains($_.name)) `
-and ($global:__ISEGoToAddOncurrcol -ge
$str.IndexOf($_.name)) `
-and ($global:__ISEGoToAddOncurrcol -le
($str.IndexOf($_.name)+$_.name.length))
)
{$selectedFunction = $_.name}
}
if($selectedFunction -ne "")
{
#See if the selected function exists in the current open file
$functionToGoTo = $functionsInFile | ? {$_.name -eq "$selectedFunction"}
$global:__ISEGoToAddOnlineToGoTo = $functionToGoTo.Extent.StartLineNumber
$global:__ISEGoToAddOncolToGoTo = $functionToGoTo.Extent.StartColumnNumber
}
if($functionToGoTo -eq $null)
{
try
{
$comm = Get-Command -Name "$selectedFunction" -ErrorAction SilentlyContinue
$comm.Definition | Out-GridView
}
catch [System.Exception]
{
}
}
else
{
#Select the function definition, assuming the function name immediately follows the keyword 'function'
try
{
$psise.CurrentFile.Editor.Select($global:__ISEGoToAddOnlineToGoTo,
($global:__ISEGoToAddOncolToGoTo+9),
$global:__ISEGoToAddOnlineToGoTo,
($global:__ISEGoToAddOncolToGoTo+8+$selectedFunction.length+1))
}
catch [System.Exception]
{
}
}
}

$global:__ISEGoToAddOnsb1 =
{& $global:__ISEGoToAddOnscriptBlockGoTo | Out-Null}
$null=$psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add(
"Go do definition", $global:__ISEGoToAddOnsb1, "F12")

$global:__ISEGoToAddOnscriptBlockGoBack =
{
try
{
#Pop the line and column numbers from the stack to do a reverse traversal
$global:__ISEGoToAddOncurrLine =
$global:__ISEGoToAddOnstackOfLine.Pop()
$global:__ISEGoToAddOncurrcol =
$global:__ISEGoToAddOnstackOfCol.Pop()
$psISE.CurrentFile.Editor.SetCaretPosition(
$global:__ISEGoToAddOncurrLine, $global:__ISEGoToAddOncurrcol)
$psISE.CurrentFile.Editor.SelectCaretLine();
}
catch [System.Exception]
{
}
}
$global:__ISEGoToAddOnsb2 = {& $global:__ISEGoToAddOnscriptBlockGoBack | Out-Null}
$null=$psISE.CurrentPowerShellTab.AddOnsMenu.Submenus.Add("Go Back",$global:__ISEGoToAddOnsb2, "Shift+F12")