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Viewing changes to src/core/Mono.Texteditor/Mono.TextEditor.Utils/TextBreaker.cs

  • Committer: Bazaar Package Importer
  • Author(s): Jo Shields
  • Date: 2011-06-27 17:03:13 UTC
  • mto: (1.8.1 upstream)
  • mto: This revision was merged to the branch mainline in revision 54.
  • Revision ID: james.westby@ubuntu.com-20110627170313-6cvz3s19x6e9hqe9
Import upstream version 2.5.92+dfsg

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src/core/Mono.Texteditor/Mono.TextEditor.Utils/TextBreaker.cs
 
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// 
 
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// TextBreaker.cs
 
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//  
 
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// Author:
 
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//       IBBoard <dev@ibboard.co.uk>
 
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// 
 
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// Copyright (c) 2011 IBBoard
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using System.Collections.Generic;
 
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namespace Mono.TextEditor.Utils
 
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{
 
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        /// <summary>
 
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        /// A utility class for breaking up the text in TextEditors
 
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        /// </summary>
 
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        public class TextBreaker
 
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        {
 
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                /// <summary>
 
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                /// Breaks the lines into words in the form of a list of <see cref="ISegment">ISegments</see>. A 'word' is defined as an identifier (a series of letters, digits or underscores)
 
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                /// or a single non-identifier character (including white space characters)
 
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                /// </summary>
 
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                /// <returns>
 
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                /// The list of segments representing the 'words' in the lines
 
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                /// </returns>
 
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                /// <param name='editor'>
 
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                /// The text editor to get the words from
 
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                /// </param>
 
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                /// <param name='startLine'>
 
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                /// The first line in the editor's documents to get the words from
 
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                /// </param>
 
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                /// <param name='lineCount'>
 
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                /// The number of lines to get words from
 
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                /// </param>
 
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                public static List<ISegment> BreakLinesIntoWords (TextEditor editor, int startLine, int lineCount)
 
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                {
 
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                        return BreakLinesIntoWords (editor.Document, startLine, lineCount);
 
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                }
 
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                /// <summary>
 
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                /// Breaks the lines into words in the form of a list of <see cref="ISegment">ISegments</see>. A 'word' is defined as an identifier (a series of letters, digits or underscores)
 
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                /// or a single non-identifier character (including white space characters)
 
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                /// </summary>
 
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                /// <returns>
 
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                /// The list of segments representing the 'words' in the lines
 
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                /// </returns>
 
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                /// <param name='document'>
 
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                /// The document to get the words from
 
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                /// </param>
 
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                /// <param name='startLine'>
 
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                /// The first line in the documents to get the words from
 
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                /// </param>
 
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                /// <param name='lineCount'>
 
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                /// The number of lines to get words from
 
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                /// </param>
 
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                public static List<ISegment> BreakLinesIntoWords (Document document, int startLine, int lineCount)
 
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                {
 
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                        var result = new List<ISegment> ();
 
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                        for (int line = startLine; line < startLine + lineCount; line++) {
 
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                                var lineSegment = document.GetLine (line);
 
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                                int offset = lineSegment.Offset;
 
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                                bool wasIdentifierPart = false;
 
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                                int lastWordEnd = 0;
 
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                                for (int i = 0; i < lineSegment.EditableLength; i++) {
 
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                                        char ch = document.GetCharAt (offset + i);
 
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                                        bool isIdentifierPart = char.IsLetterOrDigit (ch) || ch == '_';
 
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                                        if (!isIdentifierPart) {
 
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                                                if (wasIdentifierPart) {
 
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                                                        result.Add (new Mono.TextEditor.Segment (offset + lastWordEnd, i - lastWordEnd));
 
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                                                }
 
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                                                result.Add (new Mono.TextEditor.Segment (offset + i, 1));
 
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                                                lastWordEnd = i + 1;
 
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                                        }
 
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                                        wasIdentifierPart = isIdentifierPart;
 
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                                }
 
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                                if (lastWordEnd != lineSegment.EditableLength) {
 
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                                        result.Add (new Mono.TextEditor.Segment (offset + lastWordEnd, lineSegment.EditableLength - lastWordEnd));
 
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                                }
 
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                        }
 
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                        return result;
 
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                }
 
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        }
 
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}
 
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