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ICSharpCode.TextEditor/Project/Src/Document/BookmarkManager/BookmarkManager.cs

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+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using ICSharpCode.TextEditor.Util;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	public interface IBookmarkFactory
+	{
+		Bookmark CreateBookmark(IDocument document, TextLocation location);
+	}
+	
+	/// <summary>
+	/// This class handles the bookmarks for a buffer
+	/// </summary>
+	public class BookmarkManager
+	{
+		IDocument      document;
+		#if DEBUG
+		IList<Bookmark> bookmark = new CheckedList<Bookmark>();
+		#else
+		List<Bookmark> bookmark = new List<Bookmark>();
+		#endif
+		
+		/// <value>
+		/// Contains all bookmarks
+		/// </value>
+		public ReadOnlyCollection<Bookmark> Marks {
+			get {
+				return new ReadOnlyCollection<Bookmark>(bookmark);
+			}
+		}
+		
+		public IDocument Document {
+			get {
+				return document;
+			}
+		}
+		
+		/// <summary>
+		/// Creates a new instance of <see cref="BookmarkManager"/>
+		/// </summary>
+		internal BookmarkManager(IDocument document, LineManager lineTracker)
+		{
+			this.document = document;
+		}
+		
+		/// <summary>
+		/// Gets/Sets the bookmark factory used to create bookmarks for "ToggleMarkAt".
+		/// </summary>
+		public IBookmarkFactory Factory { get; set;}
+		
+		/// <summary>
+		/// Sets the mark at the line <code>location.Line</code> if it is not set, if the
+		/// line is already marked the mark is cleared.
+		/// </summary>
+		public void ToggleMarkAt(TextLocation location)
+		{
+			Bookmark newMark;
+			if (Factory != null) {
+				newMark = Factory.CreateBookmark(document, location);
+			} else {
+				newMark = new Bookmark(document, location);
+			}
+			
+			Type newMarkType = newMark.GetType();
+			
+			for (int i = 0; i < bookmark.Count; ++i) {
+				Bookmark mark = bookmark[i];
+				
+				if (mark.LineNumber == location.Line && mark.CanToggle && mark.GetType() == newMarkType) {
+					bookmark.RemoveAt(i);
+					OnRemoved(new BookmarkEventArgs(mark));
+					return;
+				}
+			}
+			
+			bookmark.Add(newMark);
+			OnAdded(new BookmarkEventArgs(newMark));
+		}
+		
+		public void AddMark(Bookmark mark)
+		{
+			bookmark.Add(mark);
+			OnAdded(new BookmarkEventArgs(mark));
+		}
+		
+		public void RemoveMark(Bookmark mark)
+		{
+			bookmark.Remove(mark);
+			OnRemoved(new BookmarkEventArgs(mark));
+		}
+		
+		public void RemoveMarks(Predicate<Bookmark> predicate)
+		{
+			for (int i = 0; i < bookmark.Count; ++i) {
+				Bookmark bm = bookmark[i];
+				if (predicate(bm)) {
+					bookmark.RemoveAt(i--);
+					OnRemoved(new BookmarkEventArgs(bm));
+				}
+			}
+		}
+		
+		/// <returns>
+		/// true, if a mark at mark exists, otherwise false
+		/// </returns>
+		public bool IsMarked(int lineNr)
+		{
+			for (int i = 0; i < bookmark.Count; ++i) {
+				if (bookmark[i].LineNumber == lineNr) {
+					return true;
+				}
+			}
+			return false;
+		}
+		
+		/// <remarks>
+		/// Clears all bookmark
+		/// </remarks>
+		public void Clear()
+		{
+			foreach (Bookmark mark in bookmark) {
+				OnRemoved(new BookmarkEventArgs(mark));
+			}
+			bookmark.Clear();
+		}
+		
+		/// <value>
+		/// The lowest mark, if no marks exists it returns -1
+		/// </value>
+		public Bookmark GetFirstMark(Predicate<Bookmark> predicate)
+		{
+			if (bookmark.Count < 1) {
+				return null;
+			}
+			Bookmark first = null;
+			for (int i = 0; i < bookmark.Count; ++i) {
+				if (predicate(bookmark[i]) && bookmark[i].IsEnabled && (first == null || bookmark[i].LineNumber < first.LineNumber)) {
+					first = bookmark[i];
+				}
+			}
+			return first;
+		}
+		
+		/// <value>
+		/// The highest mark, if no marks exists it returns -1
+		/// </value>
+		public Bookmark GetLastMark(Predicate<Bookmark> predicate)
+		{
+			if (bookmark.Count < 1) {
+				return null;
+			}
+			Bookmark last = null;
+			for (int i = 0; i < bookmark.Count; ++i) {
+				if (predicate(bookmark[i]) && bookmark[i].IsEnabled && (last == null || bookmark[i].LineNumber > last.LineNumber)) {
+					last = bookmark[i];
+				}
+			}
+			return last;
+		}
+		bool AcceptAnyMarkPredicate(Bookmark mark)
+		{
+			return true;
+		}
+		public Bookmark GetNextMark(int curLineNr)
+		{
+			return GetNextMark(curLineNr, AcceptAnyMarkPredicate);
+		}
+		
+		/// <remarks>
+		/// returns first mark higher than <code>lineNr</code>
+		/// </remarks>
+		/// <returns>
+		/// returns the next mark > cur, if it not exists it returns FirstMark()
+		/// </returns>
+		public Bookmark GetNextMark(int curLineNr, Predicate<Bookmark> predicate)
+		{
+			if (bookmark.Count == 0) {
+				return null;
+			}
+			
+			Bookmark next = GetFirstMark(predicate);
+			foreach (Bookmark mark in bookmark) {
+				if (predicate(mark) && mark.IsEnabled && mark.LineNumber > curLineNr) {
+					if (mark.LineNumber < next.LineNumber || next.LineNumber <= curLineNr) {
+						next = mark;
+					}
+				}
+			}
+			return next;
+		}
+		
+		public Bookmark GetPrevMark(int curLineNr)
+		{
+			return GetPrevMark(curLineNr, AcceptAnyMarkPredicate);
+		}
+		/// <remarks>
+		/// returns first mark lower than <code>lineNr</code>
+		/// </remarks>
+		/// <returns>
+		/// returns the next mark lower than cur, if it not exists it returns LastMark()
+		/// </returns>
+		public Bookmark GetPrevMark(int curLineNr, Predicate<Bookmark> predicate)
+		{
+			if (bookmark.Count == 0) {
+				return null;
+			}
+			
+			Bookmark prev = GetLastMark(predicate);
+			
+			foreach (Bookmark mark in bookmark) {
+				if (predicate(mark) && mark.IsEnabled && mark.LineNumber < curLineNr) {
+					if (mark.LineNumber > prev.LineNumber || prev.LineNumber >= curLineNr) {
+						prev = mark;
+					}
+				}
+			}
+			return prev;
+		}
+		
+		protected virtual void OnRemoved(BookmarkEventArgs e)
+		{
+			if (Removed != null) {
+				Removed(this, e);
+			}
+		}
+		
+		protected virtual void OnAdded(BookmarkEventArgs e)
+		{
+			if (Added != null) {
+				Added(this, e);
+			}
+		}
+		
+		public event BookmarkEventHandler Removed;
+		public event BookmarkEventHandler Added;
+	}
+}