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//
// TextBreaker.cs
//
// Author:
// IBBoard <dev@ibboard.co.uk>
//
// Copyright (c) 2011 IBBoard
//
// 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 System.Collections.Generic;
using MonoDevelop.Core;
using MonoDevelop.Core.Text;
namespace Mono.TextEditor.Utils
{
/// <summary>
/// A utility class for breaking up the text in TextEditors
/// </summary>
class TextBreaker
{
/// <summary>
/// Breaks the lines into words in the form of a list of <see cref="TextSegment">TextSegments</see>. A 'word' is defined as an identifier (a series of letters, digits or underscores)
/// or a single non-identifier character (including white space characters)
/// </summary>
/// <returns>
/// The list of segments representing the 'words' in the lines
/// </returns>
/// <param name='editor'>
/// The text editor to get the words from
/// </param>
/// <param name='startLine'>
/// The first line in the editor's documents to get the words from
/// </param>
/// <param name='lineCount'>
/// The number of lines to get words from
/// </param>
public static List<ISegment> BreakLinesIntoWords (MonoTextEditor editor, int startLine, int lineCount, bool includeDelimiter = true)
{
return BreakLinesIntoWords (editor.Document, startLine, lineCount, includeDelimiter);
}
/// <summary>
/// Breaks the lines into words in the form of a list of <see cref="TextSegment">TextSegments</see>. A 'word' is defined as an identifier (a series of letters, digits or underscores)
/// or a single non-identifier character (including white space characters)
/// </summary>
/// <returns>
/// The list of segments representing the 'words' in the lines
/// </returns>
/// <param name='document'>
/// The document to get the words from
/// </param>
/// <param name='startLine'>
/// The first line in the documents to get the words from
/// </param>
/// <param name='lineCount'>
/// The number of lines to get words from
/// </param>
public static List<ISegment> BreakLinesIntoWords (TextDocument document, int startLine, int lineCount, bool includeDelimiter = true)
{
if (document is null)
throw new ArgumentNullException (nameof (document));
if (startLine < 1)
throw new ArgumentOutOfRangeException (nameof (startLine), "startLine >= 1, was " + startLine);
if (startLine - 1 + lineCount > document.LineCount)
throw new ArgumentOutOfRangeException (nameof (startLine), "startLine + lineCount <= " + (document.LineCount + 1) + ", was " + startLine);
var result = new List<ISegment> ();
for (int line = startLine; line < startLine + lineCount; line++) {
var lineSegment = document.GetLine (line);
if (lineSegment == null)
continue;
int offset = lineSegment.Offset;
bool wasIdentifierPart = false;
int lastWordEnd = 0;
for (int i = 0; i < lineSegment.Length; i++) {
char ch = document.GetCharAt (offset + i);
bool isIdentifierPart = char.IsLetterOrDigit (ch) || ch == '_';
if (!isIdentifierPart) {
if (wasIdentifierPart) {
result.Add (new TextSegment (offset + lastWordEnd, i - lastWordEnd));
}
result.Add (new TextSegment (offset + i, 1));
lastWordEnd = i + 1;
}
wasIdentifierPart = isIdentifierPart;
}
if (lastWordEnd != lineSegment.Length) {
result.Add (new TextSegment (offset + lastWordEnd, lineSegment.Length - lastWordEnd));
}
if (includeDelimiter && lineSegment.DelimiterLength > 0)
result.Add (new TextSegment (lineSegment.Offset + lineSegment.Length, lineSegment.DelimiterLength));
}
return result;
}
}
}
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