/// <summary>
/// Gets the RTF HTML node list.
/// </summary>
/// <param name="htmlNode">The document node.</param>
/// <returns></returns>
private static List <RtfHtmlNode> GetRtfHtmlNodes(HtmlNode htmlNode)
{
List <RtfHtmlNode> rtfHtmlNodes = new List <RtfHtmlNode>();
foreach (var node in htmlNode.ChildNodes)
{
IEnumerable <HtmlNode> descendantNodes = node.Descendants();
RtfHtmlNode rtfHtmlNode = new RtfHtmlNode();
if (node.Attributes.Count > 0)
{
rtfHtmlNode.RtfParagraphFormat = node.Attributes[0].Value;
}
RtfHtmlItem rtfHtmlItem = new RtfHtmlItem();
foreach (var currentNode in descendantNodes)
{
if (currentNode.Name.Equals(RtfImageNodeName) && currentNode.Attributes.Count > 0) //Image
{
rtfHtmlItem = GetImage(currentNode);
rtfHtmlNode.RtfHtmlItem.Add(rtfHtmlItem);
rtfHtmlItem = new RtfHtmlItem();
}
else if (currentNode.Name.Equals(RtfTextNodeName)) //Text
{
rtfHtmlItem.HtmlText = currentNode.InnerText;
rtfHtmlNode.RtfHtmlItem.Add(rtfHtmlItem);
rtfHtmlItem = new RtfHtmlItem();
}
else //Format text
{
rtfHtmlItem.RtfFormattedText.Add(currentNode.Name);
}
}
rtfHtmlNodes.Add(rtfHtmlNode);
}
return(rtfHtmlNodes);
}
/// <summary>
/// Gets the image.
/// </summary>
/// <param name="htmlNode">The HTML node.</param>
/// <returns></returns>
private static RtfHtmlItem GetImage(HtmlNode htmlNode)
{
RtfHtmlItem rtfHtmlItem = new RtfHtmlItem();
if (htmlNode.Attributes.Count > 0)
{
string imageUrl = HttpUtility.UrlDecode(htmlNode.Attributes.Where(y => y.Name.Equals(RtfImageSrcName)).Select(x => x.Value).First());
if (!string.IsNullOrWhiteSpace(imageUrl))
{
//to get the image height from the specified path
int imageHeight = Image.FromFile(imageUrl).Height;
//to get the image width from the specified path
int imageWidth = Image.FromFile(imageUrl).Width;
if (!string.IsNullOrEmpty(imageUrl))
{
//declare default height and width as 0 (As per Rtf dll if its 0 than it will take original height/width else specified height/width)
//Get height/width if html node (Image) contains those attribute
var heightAttribute = htmlNode.Attributes.FirstOrDefault(y => y.Name.Equals(RtfHeightAttribute));
var widthAttribute = htmlNode.Attributes.FirstOrDefault(y => y.Name.Equals(RtfWidthAttribute));
int height;
int width;
//checking heightAttribute value
if (heightAttribute != null)
{
//setting maximum height for the image
height = Convert.ToInt32(heightAttribute.Value) > Constants.ImageHeight
? Constants.ImageHeight
: Convert.ToInt32(heightAttribute.Value);
}
else
{
//setting maximum height for the image
height = imageHeight > Constants.ImageHeight ? Constants.ImageHeight : imageHeight;
}
if (widthAttribute != null)
{
//setting maximum width for the image
width = Convert.ToInt32(widthAttribute.Value) > Constants.ImageWidth
? Constants.ImageWidth
: Convert.ToInt32(widthAttribute.Value);
}
else
{
//setting maximum width for the image
width = imageWidth > Constants.ImageWidth ? Constants.ImageWidth : imageWidth;
}
//Decode image url
imageUrl = Uri.UnescapeDataString(imageUrl);
Regex regEx = new Regex(Constants.UrlSourceRegex, RegexOptions.Compiled);
//Check added image is from URL or uploaded folder
if (regEx.Match(imageUrl).Success)
{
//Getting image from url and convert it into bitmap
WebRequest request = WebRequest.Create(imageUrl);
WebResponse response = request.GetResponse();
Stream stream = response.GetResponseStream();
if (stream != null)
{
Bitmap bitmap = new Bitmap(stream);
rtfHtmlItem.HtmlImage = bitmap;
}
}
else
{
if (File.Exists(imageUrl))
{
//getting image from uploaded folder
using (FileStream fileStream = File.Open(imageUrl, FileMode.Open, FileAccess.Read,
FileShare.ReadWrite))
{
Bitmap bitmap = new Bitmap(fileStream);
rtfHtmlItem.HtmlImage = bitmap;
}
}
}
//Assign Image width/height
rtfHtmlItem.ImageHeight = height;
rtfHtmlItem.ImageWidth = width;
}
}
}
return(rtfHtmlItem);
}
