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#Region "Microsoft.VisualBasic::12826d208ac41a93beab4e252c673311, Microsoft.VisualBasic.Core\ApplicationServices\Terminal\InteractiveIODevice\HistoryStacks.vb"
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#End Region
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Imports System.Xml.Serialization
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Imports Microsoft.VisualBasic.ComponentModel
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Imports Microsoft.VisualBasic.Serialization.JSON
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Namespace Terminal
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Public Class HistoryStacks : Inherits ITextFile
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Implements ISaveHandle
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Dim _historyList As List(Of String)
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Dim _lsthistory As List(Of History)
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Dim p As Integer
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Public Property HistoryList As List(Of History)
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Get
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Return _lsthistory
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End Get
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Set(value As List(Of History))
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_lsthistory = value
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End Set
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End Property
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Dim LastHistory As History
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Sub New()
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LastHistory = New History With {
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.Date = Now.ToString,
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.Histories = New List(Of String)
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}
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End Sub
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Sub New(path As String)
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Call Me.New
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FilePath = path
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End Sub
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Public Sub StartInitialize()
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Call __init()
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_historyList = (From his As History In _lsthistory Select his.Histories).Unlist
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p = _historyList.Count - 1
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If p < 0 Then p = 0
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End Sub
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Public Sub PushStack(s As String)
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If _historyList.IsNullOrEmpty Then
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Call __init()
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End If
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Call LastHistory.Histories.Add(s)
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Call _historyList.Insert(p, s)
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End Sub
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Private Sub __init()
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_historyList = New List(Of String)
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If _lsthistory.IsNullOrEmpty Then _lsthistory = New List(Of History)
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Call _lsthistory.Add(LastHistory)
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End Sub
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Public Function MovePrevious() As String
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p -= 1
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Return __getHistory()
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End Function
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Public Function MoveNext() As String
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p += 1
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Return __getHistory()
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End Function
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Public Function MoveFirst() As String
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p = 0
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Return __getHistory()
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End Function
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Public Function MoveLast() As String
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p = _historyList.Count - 1
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Return __getHistory()
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End Function
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Private Function __getHistory() As String
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If p < 0 Then
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p = 0
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End If
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If _historyList.IsNullOrEmpty Then
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Call __init()
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Return ""
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End If
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If p > _historyList.Count - 1 Then
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p = _historyList.Count - 1
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End If
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Dim s As String = _historyList(p)
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Return s
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End Function
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Public Structure History
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Public [Date] As String
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Public Histories As List(Of String)
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Public Overrides Function ToString() As String
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Return Me.GetJson
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End Function
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End Structure
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Public Overrides Function ToString() As String
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Return String.Join("; ", _historyList.Take(3).ToArray) & "......."
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End Function
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Public Overrides Function Save(Optional Path As String = "", Optional encoding As System.Text.Encoding = Nothing) As Boolean
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Path = MyBase.getPath(Path)
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Return Me.GetXml.SaveTo(Path, encoding)
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End Function
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Protected Overrides Function __getDefaultPath() As String
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Return FilePath
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End Function
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End Class
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End Namespace
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