SimpleTextSource.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using Unity.CodeEditor.Text;

namespace Unity.CodeEditor.Rendering
{
    internal sealed class SimpleTextSource : TextFormatter.ITextSource
    {
        private readonly string _text;
        private readonly TextParagraphProperties _properties;

        internal SimpleTextSource(string text, TextParagraphProperties properties)
        {
            _text = text;
            _properties = properties;
        }

        public TextRun GetTextRun(int textSourceCharacterIndex)
        {
            if (textSourceCharacterIndex < _text.Length)
                return new StringTextRun(
                    _text.Substring(textSourceCharacterIndex,
                        _text.Length - textSourceCharacterIndex), _properties);

            return new TextEndOfParagraph(1, _properties);
        }
    }
}