67 lines
2.6 KiB
C#
67 lines
2.6 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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dnSpy is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using System.IO;
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using Microsoft.VisualStudio.Text;
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namespace dnSpy.Text {
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sealed class SimpleTextImage : ITextImage {
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readonly string text;
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uint[]? lineOffsets;
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public char this[int position] => text[position];
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public ITextImageVersion? Version => null;
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public int Length => text.Length;
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public int LineCount {
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get {
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if (lineOffsets is null)
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lineOffsets = TextImageUtils.CreateLineOffsets(this);
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return lineOffsets.Length;
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}
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}
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public SimpleTextImage(string text) => this.text = text ?? throw new ArgumentNullException(nameof(text));
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public void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count) => text.CopyTo(sourceIndex, destination, destinationIndex, count);
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public string GetText(Span span) => text.Substring(span.Start, span.Length);
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public char[] ToCharArray(int startIndex, int length) => text.ToCharArray(startIndex, length);
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public void Write(TextWriter writer, Span span) => writer.Write(GetText(span));
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public ITextImage GetSubText(Span span) => new SimpleTextImage(GetText(span));
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public TextImageLine GetLineFromLineNumber(int lineNumber) {
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if (lineOffsets is null)
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lineOffsets = TextImageUtils.CreateLineOffsets(this);
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TextImageUtils.GetLineInfo(lineOffsets, lineNumber, Length, out int start, out int end, out int lineBreakLength);
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return new TextImageLine(this, lineNumber, new Span(start, end - start), lineBreakLength);
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}
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public TextImageLine GetLineFromPosition(int position) => GetLineFromLineNumber(GetLineNumberFromPosition(position));
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public int GetLineNumberFromPosition(int position) {
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if ((uint)position > (uint)Length)
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throw new ArgumentOutOfRangeException(nameof(position));
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if (lineOffsets is null)
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lineOffsets = TextImageUtils.CreateLineOffsets(this);
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return TextImageUtils.GetLineNumberFromPosition(lineOffsets, position, Length);
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}
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}
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}
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