C# TextEditor.LineSegment类代码示例

		public static int RemoveTabInLine (TextEditorData data, LineSegment line)
		{
			if (line.Length == 0)
				return 0;
			char ch = data.Document.GetCharAt (line.Offset); 
			if (ch == '\t') {
				data.Remove (line.Offset, 1);
				return 1;
			} else if (ch == ' ') {
				int removeCount = 0;
				for (int i = 0; i < data.Options.IndentationSize;) {
					ch = data.Document.GetCharAt (line.Offset + i);
					if (ch == ' ') {
						removeCount ++;
						i++;
					} else  if (ch == '\t') {
						removeCount ++;
						i += data.Options.TabSize;
					} else {
						break;
					}
				}
				data.Remove (line.Offset, removeCount);
				return removeCount;
			}
			return 0;
		}

		internal protected override void Draw (Cairo.Context cr, Cairo.Rectangle area, LineSegment lineSegment, int line, double x, double y, double lineHeight)
		{
			cr.MoveTo (x + 0.5, y);
			cr.LineTo (x + 0.5, y + lineHeight);
			cr.Color = color;
			cr.Stroke ();
		}

		public bool RemoveLine (LineSegment line)
		{
			if (!lineWidthDictionary.ContainsKey (line))
				return false;
			lineWidthDictionary.Remove (line);
			return true;
		}

        //(MonoDevelop.Projects.Dom.Error info, LineSegment line)
        //StyleTextMarker marker;
        public HoverMarker(LineSegment line,int startOffset, int endOffset)
        {
            this.Line = line; // may be null if no line is assigned to the error.

            //string underlineColor; = Mono.TextEditor.Highlighting.Style.WarningUnderlineString;

            marker = new UsageMarker (startOffset,endOffset);
        }

		public void DrawIcon (Mono.TextEditor.TextEditor editor, Cairo.Context cr, LineSegment line, int lineNumber, double x, double y, double width, double height)
		{
			double size;
			if (width > height) {
				x += (width - height) / 2;
				size = height;
			} else {
				y += (height - width) / 2;
				size = width;
			}
			
			DrawIcon (cr, x, y, size);
		}

		public void DrawIcon (Mono.TextEditor.TextEditor editor, Gdk.Drawable win, LineSegment line, int lineNumber, int x, int y, int width, int height)
		{
			int size;
			if (width > height) {
				x += (width - height) / 2;
				size = height;
			} else {
				y += (height - width) / 2;
				size = width;
			}
			
			using (Cairo.Context cr = Gdk.CairoHelper.Create (win)) {
				DrawIcon (cr, x, y, size);
			}
		}

		public override void Analyze (Document doc, LineSegment line, Chunk startChunk, int startOffset, int endOffset)
		{
			if (endOffset <= startOffset || startOffset >= doc.Length)
				return;
			
			string text = doc.GetTextAt (startOffset, endOffset - startOffset);
			int startColumn = startOffset - line.Offset;
			line.RemoveMarker (typeof(UrlMarker));
			foreach (System.Text.RegularExpressions.Match m in urlRegex.Matches (text)) {
				line.AddMarker (new UrlMarker (line, m.Value, UrlType.Url, syntax, startColumn + m.Index, startColumn + m.Index + m.Length));
			}
			foreach (System.Text.RegularExpressions.Match m in mailRegex.Matches (text)) {
				line.AddMarker (new UrlMarker (line, m.Value, UrlType.Email, syntax, startColumn + m.Index, startColumn + m.Index + m.Length));
			}
		}

        //(MonoDevelop.Projects.Dom.Error info, LineSegment line)
        public ErrorMarker(LineSegment line)
        {
            //this.Info = info;
            this.Line = line; // may be null if no line is assigned to the error.
            string underlineColor;
            //if (info.ErrorType == ErrorType.Warning)
            //	underlineColor = Mono.TextEditor.Highlighting.Style.WarningUnderlineString;
            //else
            underlineColor = Mono.TextEditor.Highlighting.Style.ErrorUnderlineString;

            marker = new UnderlineMarker (underlineColor, - 1, line.Length-1);

            //if (Info.Region.Start.Line == info.Region.End.Line)
            //	marker = new UnderlineMarker (underlineColor, Info.Region.Start.Column - 1, info.Region.End.Column - 1);
            //else
            //	marker = new UnderlineMarker (underlineColor, - 1, - 1);
        }

		public void DrawIcon (TextEditor editor, Cairo.Context cr, LineSegment lineSegment, int lineNumber, double x, double y, double width, double height)
		{
			if (lineSegment.IsBookmarked) {
				Cairo.Color color1 = editor.ColorStyle.BookmarkColor1;
				Cairo.Color color2 = editor.ColorStyle.BookmarkColor2;
				
				DrawRoundRectangle (cr, x + 1, y + 1, 8, width - 4, height - 4);
				Cairo.Gradient pat = new Cairo.LinearGradient (x + width / 4, y, x + width / 2, y + height - 4);
				pat.AddColorStop (0, color1);
				pat.AddColorStop (1, color2);
				cr.Pattern = pat;
				cr.FillPreserve ();
				
				pat = new Cairo.LinearGradient (x, y + height, x + width, y);
				pat.AddColorStop (0, color2);
				//pat.AddColorStop (1, color1);
				cr.Pattern = pat;
				cr.Stroke ();
			}
		}

		public override void Analyze (TextDocument doc, LineSegment line, Chunk startChunk, int startOffset, int endOffset)
		{
			if (endOffset <= startOffset || startOffset >= doc.TextLength || inUpdate)
				return;
			inUpdate = true;
			try {
				string text = doc.GetTextAt (startOffset, endOffset - startOffset);
				int startColumn = startOffset - line.Offset;
				var markers = new List <UrlMarker> (line.Markers.Where (m => m is UrlMarker).Cast<UrlMarker> ());
				markers.ForEach (m => doc.RemoveMarker (m, false));
				foreach (System.Text.RegularExpressions.Match m in UrlRegex.Matches (text)) {
					doc.AddMarker (line, new UrlMarker (doc, line, m.Value, UrlType.Url, syntax, startColumn + m.Index, startColumn + m.Index + m.Length), false);
				}
				foreach (System.Text.RegularExpressions.Match m in MailRegex.Matches (text)) {
					doc.AddMarker (line, new UrlMarker (doc, line, m.Value, UrlType.Email, syntax, startColumn + m.Index, startColumn + m.Index + m.Length), false);
				}
			} finally {
				inUpdate = false;
			}
		}

		public void DrawIcon (TextEditor editor, Gdk.Drawable win, LineSegment lineSegment, int lineNumber, int x, int y, int width, int height)
		{
			if (lineSegment.IsBookmarked) {
				Cairo.Color color1 = Style.ToCairoColor (editor.ColorStyle.BookmarkColor1);
				Cairo.Color color2 = Style.ToCairoColor (editor.ColorStyle.BookmarkColor2);
				
				Cairo.Context cr = Gdk.CairoHelper.Create (win);
				DrawRoundRectangle (cr, x + 1, y + 1, 8, width - 4, height - 4);
				Cairo.Gradient pat = new Cairo.LinearGradient (x + width / 4, y, x + width / 2, y + height - 4);
				pat.AddColorStop (0, color1);
				pat.AddColorStop (1, color2);
				cr.Pattern = pat;
				cr.FillPreserve ();
				
				pat = new Cairo.LinearGradient (x, y + height, x + width, y);
				pat.AddColorStop (0, color2);
				//pat.AddColorStop (1, color1);
				cr.Pattern = pat;
				cr.Stroke ();
				((IDisposable)cr).Dispose();
			}
		}

			public bool Equals (LineSegment line, int offset, int length, int selectionStart, int selectionEnd, out bool isInvalid)
			{
				int selStart = 0, selEnd = 0;
				if (selectionEnd >= 0) {
					selStart = selectionStart;
					selEnd = selectionEnd;
				}
				return base.Equals (line, offset, length, out isInvalid) && selStart == this.SelectionStart && selEnd == this.SelectionEnd;
			}

			public LayoutDescriptor (LineSegment line, int offset, int length, LayoutWrapper layout, int selectionStart, int selectionEnd) : base(line, offset, length)
			{
				this.Layout = layout;
				if (selectionEnd >= 0) {
					this.SelectionStart = selectionStart;
					this.SelectionEnd = selectionEnd;
				}
			}

			protected LineDescriptor (LineSegment line, int offset, int length)
			{
				this.Offset = offset;
				this.Length = length;
				this.MarkerLength = line.MarkerCount;
				this.Spans = line.StartSpan;
			}

		internal protected override void MouseHover (MarginMouseEventArgs args)
		{
			base.MouseHover (args);
			
			LineSegment lineSegment = null;
			if (args.LineSegment != null) {
				lineSegment = args.LineSegment;
				if (lineHover != lineSegment) {
					lineHover = lineSegment;
					editor.RedrawMargin (this);
				}
			} 
			lineHover = lineSegment;
			bool found = false;
			foreach (FoldSegment segment in editor.Document.GetFoldingContaining (lineSegment)) {
				if (segment.StartLine.Offset == lineSegment.Offset) {
					found = true;
					break;
				}
			}
			
			delayTimer.Stop ();
			if (found) {
				foldings = editor.Document.GetFoldingContaining (lineSegment);
				if (editor.TextViewMargin.BackgroundRenderer == null) {
					delayTimer.Start ();
				} else {
					DelayTimerElapsed (this, null);
				}
			} else {
				RemoveBackgroundRenderer ();
			}
		}