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//
// IDocumentLine.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2014 Xamarin Inc. (http://xamarin.com)
//
// 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 MonoDevelop.Core.Text;
using System.Text;
using MonoDevelop.Ide.Editor.Highlighting;
namespace MonoDevelop.Ide.Editor
{
/// <summary>
/// A line inside a <see cref="ITextDocument"/>.
/// </summary>
public interface IDocumentLine : ISegment
{
/// <summary>
/// Gets the length of the line including the line delimiter.
/// </summary>
int LengthIncludingDelimiter {
get;
}
int EndOffsetIncludingDelimiter {
get;
}
/// <summary>
/// Gets the text segment of the line including the line delimiter.
/// </summary>
ISegment SegmentIncludingDelimiter {
get;
}
/// <summary>
/// Gets the unicode newline for this line. Returns UnicodeNewline.Unknown for no new line (in the last line of the document)
/// </summary>EndOffsetIncludingDelimiterEndOffsetIncludingDelimiter
UnicodeNewline UnicodeNewline {
get;
}
/// <summary>
/// Gets the length of the line terminator.
/// Returns 1 or 2; or 0 at the end of the document.
/// </summary>
int DelimiterLength { get; }
/// <summary>
/// Gets the number of this line.
/// The first line has the number 1.
/// </summary>
int LineNumber { get; }
/// <summary>
/// Gets the previous line. Returns null if this is the first line in the document.
/// </summary>
IDocumentLine PreviousLine { get; }
/// <summary>
/// Gets the next line. Returns null if this is the last line in the document.
/// </summary>
IDocumentLine NextLine { get; }
/// <summary>
/// Gets whether the line was deleted.
/// </summary>
bool IsDeleted { get; }
}
public static class DocumentLineExt
{
/// <summary>
/// This method gets the line indentation.
/// </summary>
/// <param name = "line"></param>
/// <param name="doc">
/// The <see cref="IReadonlyTextDocument"/> the line belongs to.
/// </param>
/// <returns>
/// The indentation of the line (all whitespace chars up to the first non ws char).
/// </returns>
public static string GetIndentation (this IDocumentLine line, IReadonlyTextDocument doc)
{
var result = new StringBuilder ();
int offset = line.Offset;
int max = Math.Min (offset + line.LengthIncludingDelimiter, doc.Length);
for (int i = offset; i < max; i++) {
char ch = doc.GetCharAt (i);
if (ch != ' ' && ch != '\t')
break;
result.Append (ch);
}
return result.ToString ();
}
}
}
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