/// <summary>
        /// Determines whether the current HtmlNavigator is at the same position as the specified HtmlNavigator.
        /// </summary>
        /// <param name="other">The HtmlNavigator that you want to compare against.</param>
        /// <returns>true if the two navigators have the same position, otherwise, false.</returns>
        public override bool IsSamePosition(XPathNavigator other)
        {
            HtmlNodeNavigator nav = other as HtmlNodeNavigator;

            if (nav == null)
            {
                InternalTrace(">false");
                return(false);
            }
            InternalTrace(">" + (nav._currentnode == _currentnode));
            return(nav._currentnode == _currentnode);
        }
        private HtmlNodeNavigator(HtmlNodeNavigator nav)
        {
            if (nav == null)
            {
                throw new ArgumentNullException("nav");
            }
            InternalTrace(null);

            _doc = nav._doc;
            _currentnode = nav._currentnode;
            _attindex = nav._attindex;
            _nametable = nav._nametable; // REVIEW: should we do this?
        }
        private HtmlNodeNavigator(HtmlNodeNavigator nav)
        {
            if (nav == null)
            {
                throw new ArgumentNullException("nav");
            }
            InternalTrace(null);

            _doc         = nav._doc;
            _currentnode = nav._currentnode;
            _attindex    = nav._attindex;
            _nametable   = nav._nametable; // REVIEW: should we do this?
        }
        /// <summary>
        /// Selects the first XmlNode that matches the XPath expression.
        /// </summary>
        /// <param name="xpath">The XPath expression. May not be null.</param>
        /// <returns>The first <see cref="HtmlNode"/> that matches the XPath query or a null reference if no matching node was found.</returns>
        public HtmlNode SelectSingleNode(string xpath)
        {
            if (xpath == null)
            {
                throw new ArgumentNullException("xpath");
            }

            HtmlNodeNavigator nav = new HtmlNodeNavigator(OwnerDocument, this);
            XPathNodeIterator it = nav.Select(xpath);
            if (!it.MoveNext())
            {
                return null;
            }

            HtmlNodeNavigator node = (HtmlNodeNavigator)it.Current;
            return node.CurrentNode;
        }
        /// <summary>
        /// Selects a list of nodes matching the <see cref="XPath"/> expression.
        /// </summary>
        /// <param name="xpath">The XPath expression.</param>
        /// <returns>An <see cref="HtmlNodeCollection"/> containing a collection of nodes matching the <see cref="XPath"/> query, or <c>null</c> if no node matched the XPath expression.</returns>
        public HtmlNodeCollection SelectNodes(string xpath)
        {
            HtmlNodeCollection list = new HtmlNodeCollection(null);

            HtmlNodeNavigator nav = new HtmlNodeNavigator(OwnerDocument, this);
            XPathNodeIterator it = nav.Select(xpath);
            while (it.MoveNext())
            {
                HtmlNodeNavigator n = (HtmlNodeNavigator)it.Current;
                list.Add(n.CurrentNode);
            }
            if (list.Count == 0)
            {
                return null;
            }
            return list;
        }
Example #6
0
        /// <summary>
        /// Selects a list of nodes matching the <see cref="XPath"/> expression.
        /// </summary>
        /// <param name="xpath">The XPath expression.</param>
        /// <returns>An <see cref="HtmlNodeCollection"/> containing a collection of nodes matching the <see cref="XPath"/> query, or <c>null</c> if no node matched the XPath expression.</returns>
        public HtmlNodeCollection SelectNodes(string xpath)
        {
            HtmlNodeCollection list = new HtmlNodeCollection(null);

            HtmlNodeNavigator nav = new HtmlNodeNavigator(OwnerDocument, this);
            XPathNodeIterator it  = nav.Select(xpath);

            while (it.MoveNext())
            {
                HtmlNodeNavigator n = (HtmlNodeNavigator)it.Current;
                list.Add(n.CurrentNode);
            }
            if (list.Count == 0)
            {
                return(null);
            }
            return(list);
        }
Example #7
0
        /// <summary>
        /// Selects the first XmlNode that matches the XPath expression.
        /// </summary>
        /// <param name="xpath">The XPath expression. May not be null.</param>
        /// <returns>The first <see cref="HtmlNode"/> that matches the XPath query or a null reference if no matching node was found.</returns>
        public HtmlNode SelectSingleNode(string xpath)
        {
            if (xpath == null)
            {
                throw new ArgumentNullException("xpath");
            }

            HtmlNodeNavigator nav = new HtmlNodeNavigator(OwnerDocument, this);
            XPathNodeIterator it  = nav.Select(xpath);

            if (!it.MoveNext())
            {
                return(null);
            }

            HtmlNodeNavigator node = (HtmlNodeNavigator)it.Current;

            return(node.CurrentNode);
        }
        /// <summary>
        /// Moves to the same position as the specified HtmlNavigator.
        /// </summary>
        /// <param name="other">The HtmlNavigator positioned on the node that you want to move to.</param>
        /// <returns>true if successful, otherwise false. If false, the position of the navigator is unchanged.</returns>
        public override bool MoveTo(XPathNavigator other)
        {
            HtmlNodeNavigator nav = other as HtmlNodeNavigator;

            if (nav == null)
            {
                InternalTrace(">false (nav is not an HtmlNodeNavigator)");
                return(false);
            }
            InternalTrace("moveto oid=" + nav.GetHashCode()
                          + ", n:" + nav._currentnode.Name
                          + ", a:" + nav._attindex);

            if (nav._doc == _doc)
            {
                _currentnode = nav._currentnode;
                _attindex    = nav._attindex;
                InternalTrace(">true");
                return(true);
            }
            // we don't know how to handle that
            InternalTrace(">false (???)");
            return(false);
        }