C# Document.GetLineByOffset方法代码示例

		internal static int ScanWord (Document doc, int offset, bool forwardDirection)
		{
			if (offset < 0 || offset >= doc.Length)
				return offset;
			var line = doc.GetLineByOffset (offset);
			char first = doc.GetCharAt (offset);

			while (offset >= line.Offset && offset < line.Offset + line.EditableLength) {
				char ch = doc.GetCharAt (offset);
				if (char.IsWhiteSpace (first) && !char.IsWhiteSpace (ch)
				    || IsNoLetterOrDigit (first) && !IsNoLetterOrDigit (ch)
				    || (char.IsLetterOrDigit (first) || first == '_') && !(char.IsLetterOrDigit (ch) || ch == '_'))
					break;

				offset = forwardDirection ? offset + 1 : offset - 1;
			}
			return System.Math.Min (line.Offset + line.EditableLength,
			                        System.Math.Max (line.Offset, offset + (forwardDirection ? 0 : 1)));
		}

		int GetLastSourceCodePosition (Document document, int lineOffset)
		{
			LineSegment line = document.GetLineByOffset (lineOffset);
			bool isInBlockComment = false;
			bool isInLineComment  = false;
			int  curStringQuote   = -1;
			
			List<string> lineComments       = GetList (document, "LineComment");
			List<string> blockCommentStarts = GetList (document, "BlockCommentStart");
			List<string> blockCommentEnds   = GetList (document, "BlockCommentEnd");
			List<string> stringQuotes       = GetList (document, "StringQuote");
			
			for (int i = 0 ; i < line.EditableLength; i++) {
				int offset = line.Offset + i;
				// check line comments
				if (!isInBlockComment && curStringQuote < 0) {
					isInLineComment = StartsWithListMember (document, lineComments, offset) >= 0;
					if (isInLineComment) 
						return System.Math.Min (offset, lineOffset);
				}
				// check block comments
				if (!isInLineComment && curStringQuote < 0) {
					if (!isInBlockComment) { 
						isInBlockComment = StartsWithListMember (document, blockCommentStarts, offset) >= 0;
					} else {
						isInBlockComment = StartsWithListMember (document, blockCommentEnds, offset) < 0;
					}
				}
				
				if (!isInBlockComment && !isInLineComment) {
					int j = StartsWithListMember (document, stringQuotes, offset);
					if (j >= 0) {
						if (curStringQuote >= 0) {
							if (curStringQuote == j)
								curStringQuote = -1;
						} else {
							curStringQuote = j;
						}
					}
				}
			}
			return lineOffset;
		}

			static string GenerateRtf (Document doc, Mono.TextEditor.Highlighting.SyntaxMode mode, Mono.TextEditor.Highlighting.Style style, ITextEditorOptions options)
			{
				StringBuilder rtfText = new StringBuilder ();
				List<Gdk.Color> colorList = new List<Gdk.Color> ();
	
				ISegment selection = new Segment (0, doc.Length);
				LineSegment line    = doc.GetLineByOffset (selection.Offset);
				LineSegment endLine = doc.GetLineByOffset (selection.EndOffset);
				
				RedBlackTree<LineSegmentTree.TreeNode>.RedBlackTreeIterator iter = line.Iter;
				bool isItalic = false;
				bool isBold   = false;
				int curColor  = -1;
				do {
					bool appendSpace = false;
					line = iter.Current;
					for (Chunk chunk = mode.GetChunks (doc, style, line, line.Offset, line.EditableLength); chunk != null; chunk = chunk.Next) {
						int start = System.Math.Max (selection.Offset, chunk.Offset);
						int end   = System.Math.Min (chunk.EndOffset, selection.EndOffset);
						ChunkStyle chunkStyle = chunk.GetChunkStyle (style);
						if (start < end) {
							if (isBold != chunkStyle.Bold) {
								rtfText.Append (chunkStyle.Bold ? @"\b" : @"\b0");
								isBold = chunkStyle.Bold;
								appendSpace = true;
							}
							if (isItalic != chunkStyle.Italic) {
								rtfText.Append (chunkStyle.Italic ? @"\i" : @"\i0");
								isItalic = chunkStyle.Italic;
								appendSpace = true;
							}
							if (!colorList.Contains (chunkStyle.Color)) 
								colorList.Add (chunkStyle.Color);
							int color = colorList.IndexOf (chunkStyle.Color);
							if (curColor != color) {
								curColor = color;
								rtfText.Append (@"\cf" + (curColor + 1));
								appendSpace = true;
							}
							for (int i = start; i < end; i++) {
								char ch = chunk.GetCharAt (doc, i);
								
								switch (ch) {
								case '\\':
									rtfText.Append (@"\\");
									break;
								case '{':
									rtfText.Append (@"\{");
									break;
								case '}':
									rtfText.Append (@"\}");
									break;
								case '\t':
									rtfText.Append (@"\tab");
									appendSpace = true;
									break;
								default:
									if (appendSpace) {
										rtfText.Append (' ');
										appendSpace = false;
									}
									rtfText.Append (ch);
									break;
								}
							}
						}
					}
					if (line == endLine)
						break;
					rtfText.Append (@"\par");
					rtfText.AppendLine ();
				} while (iter.MoveNext ());
				
				// color table
				StringBuilder colorTable = new StringBuilder ();
				colorTable.Append (@"{\colortbl ;");
				for (int i = 0; i < colorList.Count; i++) {
					Gdk.Color color = colorList[i];
					colorTable.Append (@"\red");
					colorTable.Append (color.Red / 256);
					colorTable.Append (@"\green");
					colorTable.Append (color.Green / 256); 
					colorTable.Append (@"\blue");
					colorTable.Append (color.Blue / 256);
					colorTable.Append (";");
				}
				colorTable.Append ("}");
				
				
				StringBuilder rtf = new StringBuilder();
				rtf.Append (@"{\rtf1\ansi\deff0\adeflang1025");
				
				// font table
				rtf.Append (@"{\fonttbl");
				rtf.Append (@"{\f0\fnil\fprq1\fcharset128 " + options.Font.Family + ";}");
				rtf.Append ("}");
				
				rtf.Append (colorTable.ToString ());
				
				rtf.Append (@"\viewkind4\uc1\pard");
//.........这里部分代码省略.........

		bool StartsInLineComment (Document document, int offset)
		{
			List<string> lineComments = GetList (document, "LineComment");
			LineSegment line = document.GetLineByOffset (offset);
			for (int i = line.Offset ; i < offset; i++) {
				if (StartsWithListMember (document, lineComments, i) >= 0)
					return true;
			}
			return false;
		}