private IDomElement GetNextChild(IDomContainer parent, int currentIndex, out int newIndex)
{
int index = currentIndex;
var children = parent.ChildNodes;
int count = children.Count;
IDomObject effectiveNextChild = null;
while (++index < count)
{
effectiveNextChild = GetEffectiveChild(children, index);
if (effectiveNextChild.NodeType == NodeType.ELEMENT_NODE)
{
break;
}
}
if (index < count)
{
newIndex = index;
return((IDomElement)effectiveNextChild);
}
else
{
newIndex = -1;
return(null);
}
}
public static string GetLastMessageText_Html(string rawBody)
{
CQ dom = rawBody;
const string messageSeparatorStyle = "border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in";
foreach (IDomObject element in dom["*"])
{
// Lots of email clients insert html elements as message delimiters which have styling but no inner text
// This block checks for some of these patterns
if (element.NodeName == "DIV")
{
if (element.Id == "divRplyFwdMsg" || element.Id == "x_divRplyFwdMsg" || messageSeparatorStyle.Equals(element.GetAttribute("style")))
{
IDomContainer parent = element.ParentNode;
element.Remove();
RemoveSubsequent(parent);
break;
}
}
if (!element.ChildElements.Any() && !string.IsNullOrWhiteSpace(element.InnerText))
{
var separatorIndex = IndexOfAny(element.InnerText, MessageBorderMarkers);
if (separatorIndex.HasValue)
{
element.InnerText = element.InnerText.Substring(0, separatorIndex.Value);
RemoveSubsequent(element);
break;
}
}
}
return(dom.Render());
}
/// <summary>
/// Return DOM position matches (other than Nth Child)
/// </summary>
/// <param name="elm"></param>
/// <param name="position"></param>
/// <returns></returns>
protected IEnumerable <IDomObject> GetSimpleDomPostionMatches(IDomContainer elm, PositionType position)
{
if (position == PositionType.FirstChild)
{
IDomObject child = elm.FirstChild;
if (child.NodeType != NodeType.ELEMENT_NODE)
{
child = child.NextElementSibling;
}
if (child != null)
{
yield return(child);
}
}
else if (position == PositionType.LastChild)
{
IDomObject child = elm.LastChild;
if (child.NodeType != NodeType.ELEMENT_NODE)
{
child = child.PreviousElementSibling;
}
if (child != null)
{
yield return(child);
}
}
else
{
int index = 0;
foreach (var child in elm.ChildNodes)
{
switch (position)
{
case PositionType.Odd:
if (index % 2 != 0)
{
yield return(child);
}
break;
case PositionType.Even:
if (index % 2 == 0)
{
yield return(child);
}
break;
case PositionType.All:
yield return(child);
break;
default:
throw new NotImplementedException("Unimplemented position type selector");
}
}
}
}
/// <summary>
/// Return the first child of element
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
IDomObject child = element.FirstElementChild;
if (child != null)
{
yield return child;
}
}
/// <summary>
/// Return the only child of the parent element, or nothing if there are zero or more than one
/// children.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
IDomObject child = OnlyChildOrNull(element);
if (child != null)
{
yield return child;
}
}
/// <summary>
/// Return each child that matches an index returned by the forumla
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="onlyNodeName">
/// The type of node to match.
/// </param>
/// <param name="fromLast">
/// Count from the last element instead of the first.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process get matching children in this
/// collection.
/// </returns>
public IEnumerable <IDomObject> GetMatchingChildren(IDomContainer obj,
string formula,
string onlyNodeName = null,
bool fromLast = false)
{
OnlyNodeName = onlyNodeName;
FromLast = fromLast;
return(GetMatchingChildren(obj, formula));
}
/// <summary>
/// Return the only child of the parent element, or nothing if there are zero or more than one
/// children.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
IDomObject child = OnlyChildOrNull(element);
if (child != null)
{
yield return(child);
}
}
/// <summary>
/// Return the first child of element
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
IDomObject child = element.FirstChild;
if (child != null)
{
yield return(element.FirstElementChild);
}
}
/// <summary>
/// Return all child elements of element that are the last child of their type
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
HashSet<ushort> Types = new HashSet<ushort>();
foreach (var child in element.ChildElements.Reverse())
{
if (!Types.Contains(child.NodeNameID))
{
Types.Add(child.NodeNameID);
yield return child;
}
}
}
private IDomElement GetNthChild(IDomContainer parent, int index)
{
int newActualIndex;
int elementIndex = 1;
IDomElement nthChild = GetNextChild(parent, -1, out newActualIndex);
while (nthChild != null && elementIndex != index)
{
nthChild = GetNextChild(parent, newActualIndex, out newActualIndex);
elementIndex++;
}
return(nthChild);
}
/// <summary>
/// Return all child elements of element that are the last child of their type
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
HashSet <ushort> Types = new HashSet <ushort>();
foreach (var child in element.ChildElements.Reverse())
{
if (!Types.Contains(child.NodeNameID))
{
Types.Add(child.NodeNameID);
yield return(child);
}
}
}
/// <summary>
/// Return all children of the parameter element that are the first child of their type.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
var types = new HashSet <ulong>();
foreach (var child in element.ChildElements)
{
if (!types.Contains(child.NodeNameID))
{
types.Add(child.NodeNameID);
yield return(child);
}
}
}
/// <summary>
/// 尝试从 DOM 中移除此节点
/// </summary>
/// <remarks>
/// 一旦从 DOM 中移除节点，则节点及其子节点均会被标为已销毁
/// </remarks>
public virtual void Remove()
{
if ( removed )
return;
if ( _container == null )
throw new InvalidOperationException();
lock ( _container.SyncRoot )
{
_container.NodeCollection.Remove( this );
_container = null;
removed = true;
}
}
public static string GetLastMessageText_Html(string rawBody)
{
CQ dom = rawBody;
const string outlookDesktopSeparatorStyle = "border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in";
const string outlookMobileSeparatorStyle = "display:inline-block;width:98%";
// There's no well-defined way to parse the latest email from a thread
// We have to use heuristics to cover different email clients
foreach (IDomObject element in dom["*"])
{
// Lots of email clients insert html elements as message delimiters which have styling but no inner text
// This block checks for some of these patterns
if (string.Equals(element.NodeName, "div", StringComparison.OrdinalIgnoreCase) &&
(element.Id == "divRplyFwdMsg" || element.Id == "x_divRplyFwdMsg" || outlookDesktopSeparatorStyle.Equals(element.GetAttribute("style"))))
{
IDomContainer parent = element.ParentNode;
RemoveSubsequent(parent);
parent.Remove();
break;
}
if (string.Equals(element.NodeName, "hr", StringComparison.OrdinalIgnoreCase) &&
outlookMobileSeparatorStyle.Equals(element.GetAttribute("style")))
{
RemoveSubsequent(element);
element.Remove();
break;
}
if (!element.ChildElements.Any() && !string.IsNullOrWhiteSpace(element.InnerText))
{
var separatorIndex = IndexOfAny(element.InnerText, MessageBorderMarkers);
if (separatorIndex.HasValue)
{
element.InnerText = element.InnerText.Substring(0, separatorIndex.Value);
RemoveSubsequent(element);
break;
}
}
}
return(dom.Render());
}
protected IEnumerable <IDomElement> GetSiblings(IEnumerable <IDomObject> list)
{
foreach (var item in list)
{
IDomContainer parent = item.ParentNode;
int index = item.Index + 1;
int length = parent.ChildNodes.Count;
while (index < length)
{
IDomElement node = parent.ChildNodes[index] as IDomElement;
if (node != null)
{
yield return(node);
}
index++;
}
}
}
/// <summary>
/// 尝试从 DOM 中移除此节点
/// </summary>
/// <remarks>
/// 一旦从 DOM 中移除节点，则节点及其子节点均会被标为已销毁
/// </remarks>
public virtual void Remove()
{
if (removed)
{
return;
}
if (_container == null)
{
throw new InvalidOperationException();
}
lock (_container.SyncRoot)
{
_container.NodeCollection.Remove(this);
_container = null;
removed = true;
}
}
/// <summary>
/// Return the relative position of an element among its Element siblings (non-element nodes excluded)
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
protected int GetElementIndex(IDomObject element)
{
int count = 0;
IDomContainer parent = element.ParentNode;
if (parent == null)
{
count = -1;
}
else
{
foreach (IDomElement el in parent.ChildElements)
{
if (ReferenceEquals(el, element))
{
break;
}
count++;
}
}
return(count);
}
/// <summary>
/// Return each child that matches an index returned by the forumla.
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
///
/// <returns>
/// Sequence of matching children.
/// </returns>
public IEnumerable <IDomObject> GetMatchingChildren(IDomContainer obj)
{
if (!obj.HasChildren)
{
yield break;
}
else if (IsJustNumber)
{
IDomElement child = GetNthChild(obj, MatchOnlyIndex);
if (child != null)
{
yield return(child);
}
else
{
yield break;
}
}
else
{
UpdateCacheInfo(obj.ChildNodes.Count);
int elementIndex = 1;
int newActualIndex = -1;
IDomElement el = GetNextChild(obj, -1, out newActualIndex);
while (newActualIndex >= 0)
{
if (cacheInfo.MatchingIndices.Contains(elementIndex))
{
yield return(el);
}
el = GetNextChild(obj, newActualIndex, out newActualIndex);
elementIndex++;
}
}
}
/// <summary>
/// Enumerates all the elements that are the nth-last-of-type
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of matching elements
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
return(NthC.NthChildsOfType(element, Parameters[0], true));
}
/// <summary>
/// Constructor binding this list to its owner
/// </summary>
///
/// <param name="owner">
/// The object that owns this list (the parent)
/// </param>
public ChildNodeList(IDomContainer owner)
{
Owner = owner;
}
/// <summary>
/// Basic implementation of ChildMatches, runs the Matches method against each child. This should
/// be overridden with something more efficient if possible. For example, selectors that inspect
/// the element's index could get their results more easily by picking the correct results from
/// the list of children rather than testing each one.
///
/// Also note that the default iterator for ChildMatches only passed element (e.g. non-text node)
/// children. If you wanted to design a filter that worked on other node types, you should
/// override this to access all children instead of just the elements.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public virtual IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
return element.ChildElements.Where(item => Matches(item));
}
/// <summary>
/// Return DOM position matches (other than Nth Child)
/// </summary>
/// <param name="elm"></param>
/// <param name="position"></param>
/// <returns></returns>
protected IEnumerable<IDomObject> GetSimpleDomPostionMatches(IDomContainer elm, PositionType position)
{
if (position == PositionType.FirstChild)
{
IDomObject child = elm.FirstChild;
if (child.NodeType != NodeType.ELEMENT_NODE)
{
child = child.NextElementSibling;
}
if (child != null)
{
yield return child;
}
}
else if (position == PositionType.LastChild)
{
IDomObject child = elm.LastChild;
if (child.NodeType != NodeType.ELEMENT_NODE)
{
child = child.PreviousElementSibling;
}
if (child != null)
{
yield return child;
}
}
else
{
int index = 0;
foreach (var child in elm.ChildNodes)
{
switch (position)
{
case PositionType.Odd:
if (index % 2 != 0)
{
yield return child;
}
break;
case PositionType.Even:
if (index % 2 == 0)
{
yield return child;
}
break;
case PositionType.All:
yield return child;
break;
default:
throw new NotImplementedException("Unimplemented position type selector");
}
}
}
}
public DomNodeCollection(IDomContainer container)
: base(container.SyncRoot)
{
Container = container;
}
private IDomElement GetNextChild(IDomContainer parent, int currentIndex, out int newIndex)
{
int index = currentIndex;
var children = parent.ChildNodes;
int count = children.Count;
IDomObject effectiveNextChild = null;
while (++index < count) {
effectiveNextChild= GetEffectiveChild(children, index);
if (effectiveNextChild.NodeType == NodeType.ELEMENT_NODE)
{
break;
}
}
if (index < count)
{
newIndex = index;
return (IDomElement)effectiveNextChild;
}
else
{
newIndex = -1;
return null;
}
}
private IDomElement GetNthChild(IDomContainer parent, int index)
{
int newActualIndex;
int elementIndex = 1;
IDomElement nthChild = GetNextChild(parent,-1, out newActualIndex);
while (nthChild != null && elementIndex != index)
{
nthChild = GetNextChild(parent, newActualIndex, out newActualIndex);
elementIndex++;
}
return nthChild;
}
/// <summary>
/// Return each child that matches an index returned by the forumla.
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
///
/// <returns>
/// Sequence of matching children.
/// </returns>
public IEnumerable<IDomObject> GetMatchingChildren(IDomContainer obj)
{
if (!obj.HasChildren)
{
yield break;
}
else if (IsJustNumber)
{
IDomElement child = GetNthChild(obj,MatchOnlyIndex);
if (child != null)
{
yield return child;
}
else
{
yield break;
}
}
else
{
UpdateCacheInfo(obj.ChildNodes.Count);
int elementIndex = 1;
int newActualIndex=-1;
IDomElement el = GetNextChild(obj, -1, out newActualIndex);
while (newActualIndex >= 0)
{
if (cacheInfo.MatchingIndices.Contains(elementIndex))
{
yield return el;
}
el = GetNextChild(obj, newActualIndex, out newActualIndex);
elementIndex++;
}
}
}
/// <summary>
/// Basic implementation of ChildMatches, runs the Matches method against each child. This should
/// be overridden with something more efficient if possible. For example, selectors that inspect
/// the element's index could get their results more easily by picking the correct results from
/// the list of children rather than testing each one.
///
/// Also note that the default iterator for ChildMatches only passed element (e.g. non-text node)
/// children. If you wanted to design a filter that worked on other node types, you should
/// override this to access all children instead of just the elements.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public virtual IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
return(element.ChildElements.Where(item => Matches(item)));
}
/// <summary>
/// Enumerates nth children in this collection.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="fromLast">
/// When true, count from the last element instead of the first.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process nth childs in this collection.
/// </returns>
public IEnumerable <IDomObject> NthChilds(IDomContainer element, string formula, bool fromLast = false)
{
return(GetMatchingChildren(element, formula, null, fromLast));
}
public static T InsertNode <T>(this IDomContainer container, int index, T node) where T : DomNode
{
container.NodeCollection.Insert(index, node);
return(node);
}
/// <summary>
/// Return each child that matches an index returned by the forumla.
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process get matching children in this
/// collection.
/// </returns>
public IEnumerable <IDomObject> GetMatchingChildren(IDomContainer obj, string formula)
{
Text = formula;
return(GetMatchingChildren(obj));
}
/// <summary>
/// Return a sequence of all children of the parent element that are nth children
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
return NthC.NthChilds(element,Parameters[0],false);
}
/// <summary>
/// Return the children of the parent element that are the only elements of that type among the
/// other children.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable <IDomObject> ChildMatches(IDomContainer element)
{
return(OnlyChildOfAnyType(element));
}
/// <summary>
/// Return the children of the parent element that are the only elements of that type among the
/// other children.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public override IEnumerable<IDomObject> ChildMatches(IDomContainer element)
{
return OnlyChildOfAnyType(element);
}
/// <summary>
/// Enumerates nth children of the same type as the parent.
/// </summary>
///
/// <remarks>
/// This could be implemented more efficiently, but it's a bit complicated because we need to keep track of n
/// for each type of element
/// </remarks>
/// <param name="element">
/// The parent element.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="fromLast">
/// Count from the last element instead of the first.
/// </param>
///
/// <returns>
/// A sequence of matching elements
/// </returns>
public IEnumerable<IDomObject> NthChildsOfType(IDomContainer element, string formula, bool fromLast = false)
{
return element.ChildElements
.Where(item=>IsNthChildOfType(item,formula,fromLast));
}
/// <summary>
/// Enumerates nth children of the same type as the parent.
/// </summary>
///
/// <remarks>
/// This could be implemented more efficiently, but it's a bit complicated because we need to keep track of n
/// for each type of element
/// </remarks>
/// <param name="element">
/// The parent element.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="fromLast">
/// Count from the last element instead of the first.
/// </param>
///
/// <returns>
/// A sequence of matching elements
/// </returns>
public IEnumerable <IDomObject> NthChildsOfType(IDomContainer element, string formula, bool fromLast = false)
{
return(element.ChildElements
.Where(item => IsNthChildOfType(item, formula, fromLast)));
}
public static T AddNode <T>(this IDomContainer container, T node) where T : DomNode
{
container.NodeCollection.Add(node);
return(node);
}
/// <summary>
/// Enumerates nth children in this collection.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="fromLast">
/// When true, count from the last element instead of the first.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process nth childs in this collection.
/// </returns>
public IEnumerable<IDomObject> NthChilds(IDomContainer element, string formula, bool fromLast = false)
{
return GetMatchingChildren(element, formula, null, fromLast);
}
/// <summary>
/// Return each child that matches an index returned by the forumla
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
/// <param name="onlyNodeName">
/// The type of node to match.
/// </param>
/// <param name="fromLast">
/// Count from the last element instead of the first.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process get matching children in this
/// collection.
/// </returns>
public IEnumerable<IDomObject> GetMatchingChildren(IDomContainer obj,
string formula,
string onlyNodeName = null,
bool fromLast = false)
{
OnlyNodeName = onlyNodeName;
FromLast = fromLast;
return GetMatchingChildren(obj, formula);
}
/// <summary>
/// Return each child that matches an index returned by the forumla.
/// </summary>
///
/// <param name="obj">
/// The parent object.
/// </param>
/// <param name="formula">
/// The formula for determining n.
/// </param>
///
/// <returns>
/// An enumerator that allows foreach to be used to process get matching children in this
/// collection.
/// </returns>
public IEnumerable<IDomObject> GetMatchingChildren(IDomContainer obj, string formula)
{
Text = formula;
return GetMatchingChildren(obj);
}
/// <summary>
/// Return a sequence of all children matching the selector implementation.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public abstract IEnumerable <IDomObject> ChildMatches(IDomContainer element);
/// <summary>
/// Return a sequence of all children matching the selector implementation.
/// </summary>
///
/// <param name="element">
/// The parent element.
/// </param>
///
/// <returns>
/// A sequence of children that match.
/// </returns>
public abstract IEnumerable<IDomObject> ChildMatches(IDomContainer element);
