55 lines
1.8 KiB
C#
55 lines
1.8 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
|
|
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
|
|
|
|
using System;
|
|
using System.Diagnostics;
|
|
using Microsoft.AspNetCore.Razor.Text;
|
|
using Microsoft.AspNetCore.Razor.Tokenizer.Symbols;
|
|
|
|
namespace Microsoft.AspNetCore.Razor.Tokenizer
|
|
{
|
|
public class TokenizerView<TTokenizer, TSymbol, TSymbolType>
|
|
where TSymbolType : struct
|
|
where TTokenizer : Tokenizer<TSymbol, TSymbolType>
|
|
where TSymbol : SymbolBase<TSymbolType>
|
|
{
|
|
public TokenizerView(TTokenizer tokenizer)
|
|
{
|
|
Tokenizer = tokenizer;
|
|
}
|
|
|
|
public TTokenizer Tokenizer { get; private set; }
|
|
public bool EndOfFile { get; private set; }
|
|
public TSymbol Current { get; private set; }
|
|
|
|
public ITextDocument Source
|
|
{
|
|
get { return Tokenizer.Source; }
|
|
}
|
|
|
|
public bool Next()
|
|
{
|
|
Current = Tokenizer.NextSymbol();
|
|
EndOfFile = (Current == null);
|
|
return !EndOfFile;
|
|
}
|
|
|
|
public void PutBack(TSymbol symbol)
|
|
{
|
|
Debug.Assert(Source.Position == symbol.Start.AbsoluteIndex + symbol.Content.Length);
|
|
if (Source.Position != symbol.Start.AbsoluteIndex + symbol.Content.Length)
|
|
{
|
|
// We've already passed this symbol
|
|
throw new InvalidOperationException(
|
|
RazorResources.FormatTokenizerView_CannotPutBack(
|
|
symbol.Start.AbsoluteIndex + symbol.Content.Length,
|
|
Source.Position));
|
|
}
|
|
Source.Position -= symbol.Content.Length;
|
|
Current = null;
|
|
EndOfFile = Source.Position >= Source.Length;
|
|
Tokenizer.Reset();
|
|
}
|
|
}
|
|
}
|