private static void ProcessMobileSpecificMetaElements(XElement headElement, DomSerializationParams domSerializationParams)
{
XElement metaViewportElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "viewport".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'viewport' element if present
if (metaViewportElement != null)
{
metaViewportElement.Remove();
}
XElement metaHandheldFriendlyElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "HandheldFriendly".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'HandheldFriendly' element if present
if (metaHandheldFriendlyElement != null)
{
metaHandheldFriendlyElement.Remove();
}
if (!domSerializationParams.DontIncludeMobileSpecificMetaElements)
{
// add <meta name="HandheldFriendly" ... /> element
metaHandheldFriendlyElement = new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("name", "HandheldFriendly"),
new XAttribute("content", "true"));
headElement.AddFirst(metaHandheldFriendlyElement);
}
}
private static void ProcessMetaContentTypeElement(XElement headElement, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeContentTypeMetaElement)
{
XElement metaContentTypeElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "content-type".Equals(metaElement.GetAttributeValue("http-equiv", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'http-equiv' element if present
if (metaContentTypeElement != null)
{
metaContentTypeElement.Remove();
}
// add <meta name="http-equiv" ... /> element
metaContentTypeElement =
new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("http-equiv", "Content-Type"),
new XAttribute("content", "text/html; charset=utf-8"));
headElement.AddFirst(metaContentTypeElement);
}
}
/// <summary>
/// Serializes given DOM (System.Xml.Linq.XDocument object) to a string.
/// </summary>
/// <param name="document">System.Xml.Linq.XDocument instance containing the DOM to be serialized.</param>
/// <param name="domSerializationParams">Contains parameters that modify the behaviour of the output serialization.</param>
/// <param name="bodyOnly">if set to <c>true</c> [returns body only].</param>
/// <returns>
/// Serialized representation of the DOM.
/// </returns>
/// <exception cref="System.ArgumentException">
/// The document must have a root.
/// or
/// The document's root must be an html element.
/// </exception>
public string SerializeDocument(XDocument document, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeContentTypeMetaElement
|| !domSerializationParams.DontIncludeMobileSpecificMetaElements
|| !domSerializationParams.DontIncludeGeneratorMetaElement)
{
var documentRoot = document.Root;
if (documentRoot == null)
{
throw new ArgumentException("The document must have a root.");
}
if (documentRoot.Name == null || !"html".Equals(documentRoot.Name.LocalName, StringComparison.OrdinalIgnoreCase))
{
throw new ArgumentException("The document's root must be an html element.");
}
// add <head> element if not present
var headElement = documentRoot.GetChildrenByTagName("head").FirstOrDefault();
if (headElement == null)
{
headElement = new XElement("head");
documentRoot.AddFirst(headElement);
}
ProcessMetaElements(headElement, domSerializationParams);
}
string result = document.ToString(domSerializationParams.PrettyPrint ? SaveOptions.None : SaveOptions.DisableFormatting);
if (!domSerializationParams.DontIncludeDocTypeMetaElement)
{
result = "<!DOCTYPE html>\r\n" + result;
}
if (domSerializationParams.BodyOnly && document.Root != null)
{
var body = document.Root.GetElementsByTagName("body").FirstOrDefault();
if (body != null)
{
result = body.GetInnerHtml();
}
}
if (domSerializationParams.NoHeadline)
{
var h1 = document.Root.GetElementsByTagName("h1").FirstOrDefault();
if (h1 != null)
{
result = result.Replace(h1.ToString(), "");
}
}
return result;
}
/// <summary>
/// Serializes given DOM (System.Xml.Linq.XDocument object) to a string.
/// </summary>
/// <param name="document">System.Xml.Linq.XDocument instance containing the DOM to be serialized.</param>
/// <param name="domSerializationParams">Contains parameters that modify the behaviour of the output serialization.</param>
/// <param name="bodyOnly">if set to <c>true</c> [returns body only].</param>
/// <returns>
/// Serialized representation of the DOM.
/// </returns>
/// <exception cref="System.ArgumentException">
/// The document must have a root.
/// or
/// The document's root must be an html element.
/// </exception>
public string SerializeDocument(XDocument document, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeContentTypeMetaElement ||
!domSerializationParams.DontIncludeMobileSpecificMetaElements ||
!domSerializationParams.DontIncludeGeneratorMetaElement)
{
var documentRoot = document.Root;
if (documentRoot == null)
{
throw new ArgumentException("The document must have a root.");
}
if (documentRoot.Name == null || !"html".Equals(documentRoot.Name.LocalName, StringComparison.OrdinalIgnoreCase))
{
throw new ArgumentException("The document's root must be an html element.");
}
// add <head> element if not present
var headElement = documentRoot.GetChildrenByTagName("head").FirstOrDefault();
if (headElement == null)
{
headElement = new XElement("head");
documentRoot.AddFirst(headElement);
}
ProcessMetaElements(headElement, domSerializationParams);
}
string result = document.ToString(domSerializationParams.PrettyPrint ? SaveOptions.None : SaveOptions.DisableFormatting);
if (!domSerializationParams.DontIncludeDocTypeMetaElement)
{
result = "<!DOCTYPE html>\r\n" + result;
}
if (domSerializationParams.BodyOnly && document.Root != null)
{
var body = document.Root.GetElementsByTagName("body").FirstOrDefault();
if (body != null)
{
result = body.GetInnerHtml();
}
}
if (domSerializationParams.NoHeadline)
{
var h1 = document.Root.GetElementsByTagName("h1").FirstOrDefault();
if (h1 != null)
{
result = result.Replace(h1.ToString(), "");
}
}
return(result);
}
private static void ProcessMetaGeneratorElement(XElement headElement, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeGeneratorMetaElement)
{
XElement metaGeneratorElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "Generator".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'generator' element if present
if (metaGeneratorElement != null)
{
metaGeneratorElement.Remove();
}
// add <meta name="Generator" ... /> element
metaGeneratorElement = new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("name", "Generator"),
new XAttribute("content", Consts.NReadabilityFullName));
headElement.AddFirst(metaGeneratorElement);
}
}
public string Transcode(string htmlContent, string url, DomSerializationParams domSerializationParams, out bool mainContentExtracted, out string nextPageUrl)
{
string extractedTitle;
XDocument document =
TranscodeToXml(
htmlContent,
url,
out mainContentExtracted,
out extractedTitle,
out nextPageUrl);
return _sgmlDomSerializer.SerializeDocument(document, domSerializationParams);
}
private static void ProcessMobileSpecificMetaElements(XElement headElement, DomSerializationParams domSerializationParams)
{
XElement metaViewportElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "viewport".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'viewport' element if present
if (metaViewportElement != null)
{
metaViewportElement.Remove();
}
XElement metaHandheldFriendlyElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "HandheldFriendly".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'HandheldFriendly' element if present
if (metaHandheldFriendlyElement != null)
{
metaHandheldFriendlyElement.Remove();
}
if (!domSerializationParams.DontIncludeMobileSpecificMetaElements)
{
// add <meta name="HandheldFriendly" ... /> element
metaHandheldFriendlyElement = new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("name", "HandheldFriendly"),
new XAttribute("content", "true"));
headElement.AddFirst(metaHandheldFriendlyElement);
}
}
private static void ProcessMetaGeneratorElement(XElement headElement, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeGeneratorMetaElement)
{
XElement metaGeneratorElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "Generator".Equals(metaElement.GetAttributeValue("name", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'generator' element if present
if (metaGeneratorElement != null)
{
metaGeneratorElement.Remove();
}
// add <meta name="Generator" ... /> element
metaGeneratorElement = new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("name", "Generator"),
new XAttribute("content", Consts.NReadabilityFullName));
headElement.AddFirst(metaGeneratorElement);
}
}
private static void ProcessMetaElements(XElement headElement, DomSerializationParams domSerializationParams)
{
ProcessMetaContentTypeElement(headElement, domSerializationParams);
ProcessMobileSpecificMetaElements(headElement, domSerializationParams);
ProcessMetaGeneratorElement(headElement, domSerializationParams);
}
private static void ProcessMetaContentTypeElement(XElement headElement, DomSerializationParams domSerializationParams)
{
if (!domSerializationParams.DontIncludeContentTypeMetaElement)
{
XElement metaContentTypeElement =
(from metaElement in headElement.GetChildrenByTagName("meta")
where "content-type".Equals(metaElement.GetAttributeValue("http-equiv", ""), StringComparison.OrdinalIgnoreCase)
select metaElement).FirstOrDefault();
// remove meta 'http-equiv' element if present
if (metaContentTypeElement != null)
{
metaContentTypeElement.Remove();
}
// add <meta name="http-equiv" ... /> element
metaContentTypeElement =
new XElement(
XName.Get("meta", headElement.Name != null ? (headElement.Name.NamespaceName ?? "") : ""),
new XAttribute("http-equiv", "Content-Type"),
new XAttribute("content", "text/html; charset=utf-8"));
headElement.AddFirst(metaContentTypeElement);
}
}
private static void ProcessMetaElements(XElement headElement, DomSerializationParams domSerializationParams)
{
ProcessMetaContentTypeElement(headElement, domSerializationParams);
ProcessMobileSpecificMetaElements(headElement, domSerializationParams);
ProcessMetaGeneratorElement(headElement, domSerializationParams);
}
/// <summary>
/// Serializes given DOM (System.Xml.Linq.XDocument object) to a string.
/// </summary>
/// <param name="document">System.Xml.Linq.XDocument instance containing the DOM to be serialized.</param>
/// <returns>Serialized representation of the DOM.</returns>
public string SerializeDocument(XDocument document)
{
return(SerializeDocument(document, DomSerializationParams.CreateDefault()));
}
