C# Lexer.InferredTag方法代碼示例

			public virtual void Parse(Lexer lexer, Node body, short mode)
			{
				Node node;
				bool checkstack, iswhitenode;
				
				mode = Lexer.IgnoreWhitespace;
				checkstack = true;
				TagTable tt = lexer.Options.tt;
				
				while (true)
				{
					node = lexer.GetToken(mode);
					if (node == null)
					{
						break;
					}
					if (node.Tag == body.Tag && node.Type == Node.EndTag)
					{
						body.Closed = true;
						Node.TrimSpaces(lexer, body);
						lexer.seenBodyEndTag = 1;
						mode = Lexer.IgnoreWhitespace;
						
						if (body.Parent.Tag == tt.TagNoframes)
						{
							break;
						}
						
						continue;
					}
					
					if (node.Tag == tt.TagNoframes)
					{
						if (node.Type == Node.StartTag)
						{
							Node.InsertNodeAtEnd(body, node);
							TidyNet.ParserImpl.ParseBlock.Parse(lexer, node, mode);
							continue;
						}
						
						if (node.Type == Node.EndTag && body.Parent.Tag == tt.TagNoframes)
						{
							Node.TrimSpaces(lexer, body);
							lexer.UngetToken();
							break;
						}
					}
					
					if ((node.Tag == tt.TagFrame || node.Tag == tt.TagFrameset) && body.Parent.Tag == tt.TagNoframes)
					{
						Node.TrimSpaces(lexer, body);
						lexer.UngetToken();
						break;
					}
					
					if (node.Tag == tt.TagHtml)
					{
						if (node.Type == Node.StartTag || node.Type == Node.StartEndTag)
						{
							Report.Warning(lexer, body, node, Report.DISCARDING_UNEXPECTED);
						}
						
						continue;
					}
					
					iswhitenode = false;
					
					if (node.Type == Node.TextNode && node.End <= node.Start + 1 && node.Textarray[node.Start] == (sbyte) ' ')
					{
						iswhitenode = true;
					}
					
					/* deal with comments etc. */
					if (Node.InsertMisc(body, node))
					{
						continue;
					}
					
					if (lexer.seenBodyEndTag == 1 && !iswhitenode)
					{
						++lexer.seenBodyEndTag;
						Report.Warning(lexer, body, node, Report.CONTENT_AFTER_BODY);
					}
					
					/* mixed content model permits text */
					if (node.Type == Node.TextNode)
					{
						if (iswhitenode && mode == Lexer.IgnoreWhitespace)
						{
							continue;
						}
						
						if (lexer.Options.EncloseText && !iswhitenode)
						{
							Node para;
							
							lexer.UngetToken();
							para = lexer.InferredTag("p");
							Node.InsertNodeAtEnd(body, para);
							TidyNet.ParserImpl.parseTag(lexer, para, mode);
//.........這裏部分代碼省略.........

		/*
		HTML is the top level element
		*/
		public static Node parseDocument(Lexer lexer)
		{
			Node node, document, html;
			Node doctype = null;
			TagTable tt = lexer.Options.tt;

			document = lexer.NewNode();
			document.Type = Node.RootNode;
			
			while (true)
			{
				node = lexer.GetToken(Lexer.IgnoreWhitespace);
				if (node == null)
				{
					break;
				}
				
				/* deal with comments etc. */
				if (Node.InsertMisc(document, node))
				{
					continue;
				}
				
				if (node.Type == Node.DocTypeTag)
				{
					if (doctype == null)
					{
						Node.InsertNodeAtEnd(document, node);
						doctype = node;
					}
					else
					{
						Report.Warning(lexer, document, node, Report.DISCARDING_UNEXPECTED);
					}
					continue;
				}
				
				if (node.Type == Node.EndTag)
				{
					Report.Warning(lexer, document, node, Report.DISCARDING_UNEXPECTED); //TODO?
					continue;
				}
				
				if (node.Type != Node.StartTag || node.Tag != tt.TagHtml)
				{
					lexer.UngetToken();
					html = lexer.InferredTag("html");
				}
				else
				{
					html = node;
				}
				
				Node.InsertNodeAtEnd(document, html);
				ParseHTML.Parse(lexer, html, (short) 0); // TODO?
				break;
			}
			
			return document;
		}

        /*
        This is a major clean up to strip out all the extra stuff you get
        when you save as web page from Word 2000. It doesn't yet know what
        to do with VML tags, but these will appear as errors unless you
        declare them as new tags, such as o:p which needs to be declared
        as inline.
        */
        public virtual void CleanWord2000(Lexer lexer, Node node)
        {
            /* used to a list from a sequence of bulletted p's */
            Node list = null;

            while (node != null)
            {
                /* discard Word's style verbiage */
                if (node.Tag == _tt.TagStyle || node.Tag == _tt.TagMeta || node.Type == Node.CommentTag)
                {
                    node = Node.DiscardElement(node);
                    continue;
                }

                /* strip out all span tags Word scatters so liberally! */
                if (node.Tag == _tt.TagSpan)
                {
                    node = StripSpan(lexer, node);
                    continue;
                }

                /* get rid of Word's xmlns attributes */
                if (node.Tag == _tt.TagHtml)
                {
                    /* check that it's a Word 2000 document */
                    if (node.GetAttrByName("xmlns:o") == null)
                    {
                        return;
                    }
                }

                if (node.Tag == _tt.TagLink)
                {
                    AttVal attr = node.GetAttrByName("rel");

                    if (attr != null && attr.Val != null && attr.Val.Equals("File-List"))
                    {
                        node = Node.DiscardElement(node);
                        continue;
                    }
                }

                /* discard empty paragraphs */
                if (node.Content == null && node.Tag == _tt.TagP)
                {
                    node = Node.DiscardElement(node);
                    continue;
                }

                if (node.Tag == _tt.TagP)
                {
                    AttVal attr = node.GetAttrByName("class");

                    /* map sequence of <p class="MsoListBullet"> to <ul>...</ul> */
                    if (attr != null && attr.Val != null && attr.Val.Equals("MsoListBullet"))
                    {
                        Node.CoerceNode(lexer, node, _tt.TagLi);

                        if (list == null || list.Tag != _tt.TagUl)
                        {
                            list = lexer.InferredTag("ul");
                            Node.InsertNodeBeforeElement(node, list);
                        }

                        PurgeAttributes(node);

                        if (node.Content != null)
                        {
                            CleanWord2000(lexer, node.Content);
                        }

                        /* remove node and append to contents of list */
                        Node.RemoveNode(node);
                        Node.InsertNodeAtEnd(list, node);
                        node = list.Next;
                    }
                    else if (attr != null && attr.Val != null && attr.Val.Equals("Code"))
                    {
                        /* map sequence of <p class="Code"> to <pre>...</pre> */
                        Node br = lexer.NewLineNode();
                        NormalizeSpaces(lexer, node);

                        if (list == null || list.Tag != _tt.TagPre)
                        {
                            list = lexer.InferredTag("pre");
                            Node.InsertNodeBeforeElement(node, list);
                        }

                        /* remove node and append to contents of list */
                        Node.RemoveNode(node);
                        Node.InsertNodeAtEnd(list, node);
                        StripSpan(lexer, node);
                        Node.InsertNodeAtEnd(list, br);
//.........這裏部分代碼省略.........

        /*
        if a table row is empty then insert an empty cell
        this practice is consistent with browser behavior
        and avoids potential problems with row spanning cells
        */
        public static void FixEmptyRow(Lexer lexer, Node row)
        {
            Node cell;

            if (row.Content == null)
            {
                cell = lexer.InferredTag("td");
                InsertNodeAtEnd(row, cell);
                Report.Warning(lexer, row, cell, Report.MISSING_STARTTAG);
            }
        }

        public static void TrimEmptyElement(Lexer lexer, Node element)
        {
            TagTable tt = lexer.Options.tt;

            if (lexer.CanPrune(element))
            {
                if (element.Type != TextNode)
                {
                    Report.Warning(lexer, element, null, Report.TRIM_EMPTY_ELEMENT);
                }

                DiscardElement(element);
            }
            else if (element.Tag == tt.TagP && element.Content == null && lexer.Options.DropEmptyElements == true)
            {
                /* replace <p></p> by <br><br> to preserve formatting */
                Node node = lexer.InferredTag("br");
                Node.CoerceNode(lexer, element, tt.TagBr);
                Node.InsertNodeAfterElement(element, node);
            }
        }

        /*
        Add meta element for page transition effect, this works on IE but not NS
        */
        public virtual void AddTransitionEffect(Lexer lexer, Node root, short effect, double duration)
        {
            Node head = root.FindHead(lexer.Options.tt);
            string transition;

            if (0 <= effect && effect <= 23)
            {
                transition = "revealTrans(Duration=" + (duration).ToString() + ",Transition=" + effect + ")";
            }
            else
            {
                transition = "blendTrans(Duration=" + (duration).ToString() + ")";
            }

            if (head != null)
            {
                Node meta = lexer.InferredTag("meta");
                meta.AddAttribute("http-equiv", "Page-Enter");
                meta.AddAttribute("content", transition);
                Node.InsertNodeAtStart(head, meta);
            }
        }

        /*
        Symptom: <center>
        Action: replace <center> by <div style="text-align: center">
        */
        private bool Center2Div(Lexer lexer, Node node, MutableObject pnode)
        {
            if (node.Tag == _tt.TagCenter)
            {
                if (lexer.Options.DropFontTags)
                {
                    if (node.Content != null)
                    {
                        Node last = node.Last;
                        Node parent = node.Parent;

                        DiscardContainer(node, pnode);

                        node = lexer.InferredTag("br");

                        if (last.Next != null)
                        {
                            last.Next.Prev = node;
                        }

                        node.Next = last.Next;
                        last.Next = node;
                        node.Prev = last;

                        if (parent.Last == last)
                        {
                            parent.Last = node;
                        }

                        node.Parent = parent;
                    }
                    else
                    {
                        Node prev = node.Prev;
                        Node next = node.Next;
                        Node parent = node.Parent;
                        DiscardContainer(node, pnode);

                        node = lexer.InferredTag("br");
                        node.Next = next;
                        node.Prev = prev;
                        node.Parent = parent;

                        if (next != null)
                        {
                            next.Prev = node;
                        }
                        else
                        {
                            parent.Last = node;
                        }

                        if (prev != null)
                        {
                            prev.Next = node;
                        }
                        else
                        {
                            parent.Content = node;
                        }
                    }

                    return true;
                }
                node.Tag = _tt.TagDiv;
                node.Element = "div";
                AddStyleProperty(node, "text-align: center");
                return true;
            }

            return false;
        }

 public static void CoerceNode(Lexer lexer, Node node, Dict tag)
 {
     Node tmp = lexer.InferredTag(tag.Name);
     Report.Warning(lexer, node, tmp, Report.OBSOLETE_ELEMENT);
     node.Was = node.Tag;
     node.Tag = tag;
     node.Type = StartTag;
     node.Isimplicit = true;
     node.Element = tag.Name;
 }