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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Collections.Generic;
using System.IO;
using ICSharpCode.AvalonEdit.Document;
namespace ICSharpCode.AvalonEdit.Indentation.CSharp
{
/// <summary>
/// Interface used for the indentation class to access the document.
/// </summary>
public interface IDocumentAccessor
{
/// <summary>Gets if the current line is read only (because it is not in the
/// selected text region)</summary>
bool IsReadOnly { get; }
/// <summary>Gets the number of the current line.</summary>
int LineNumber { get; }
/// <summary>Gets/Sets the text of the current line.</summary>
string Text { get; set; }
/// <summary>Advances to the next line.</summary>
bool MoveNext();
}
#region TextDocumentAccessor
/// <summary>
/// Adapter IDocumentAccessor -> TextDocument
/// </summary>
public sealed class TextDocumentAccessor : IDocumentAccessor
{
readonly TextDocument doc;
readonly int minLine;
readonly int maxLine;
/// <summary>
/// Creates a new TextDocumentAccessor.
/// </summary>
public TextDocumentAccessor(TextDocument document)
{
if (document == null)
throw new ArgumentNullException("document");
doc = document;
this.minLine = 1;
this.maxLine = doc.LineCount;
}
/// <summary>
/// Creates a new TextDocumentAccessor that indents only a part of the document.
/// </summary>
public TextDocumentAccessor(TextDocument document, int minLine, int maxLine)
{
if (document == null)
throw new ArgumentNullException("document");
doc = document;
this.minLine = minLine;
this.maxLine = maxLine;
}
int num;
string text;
DocumentLine line;
/// <inheritdoc/>
public bool IsReadOnly {
get {
return num < minLine;
}
}
/// <inheritdoc/>
public int LineNumber {
get {
return num;
}
}
bool lineDirty;
/// <inheritdoc/>
public string Text {
get { return text; }
set {
if (num < minLine) return;
text = value;
lineDirty = true;
}
}
/// <inheritdoc/>
public bool MoveNext()
{
if (lineDirty) {
doc.Replace(line, text);
lineDirty = false;
}
++num;
if (num > maxLine) return false;
line = doc.GetLineByNumber(num);
text = doc.GetText(line);
return true;
}
}
#endregion
}
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