private Parser(Reader <Token> reader, ISelectorGenerator generator)
{
Debug.Assert(reader != null);
Debug.Assert(generator != null);
_reader = reader;
_generator = generator;
}
public Selector <HtmlNode> After(ISelectorGenerator subgenerator)
{
return(nodes => nodes.SelectNonNull(parent =>
{
var start = IndexOfChild(subgenerator, parent, 0);
return start != null ? CreateNodesGroup(parent.OwnerDocument, parent.ChildNodes, start.Value + 1, parent.ChildNodes.Count - 1, true) : null;
}));
}
public Selector <HtmlNode> Has(ISelectorGenerator subgenerator)
{
var castedGenerator = (SelectorGenerator <HtmlNode>)subgenerator;
var compiled = castedGenerator.Selector;
return(nodes => nodes.Where(n => compiled(new[] { n }).Any()));
}
private Parser(Reader <Token> reader, ISelectorGenerator generator, bool expectEoi)
{
Debug.Assert(reader != null);
Debug.Assert(generator != null);
_reader = reader;
_generator = generator;
_expectEoi = expectEoi;
}
/// <summary>
/// Initializes a new instance of <see cref="SelectorGeneratorTee"/>
/// with the two other <see cref="ISelectorGenerator"/> objects
/// it delegates to.
/// </summary>
public SelectorGeneratorTee(ISelectorGenerator primary, ISelectorGenerator secondary)
{
if (primary == null) throw new ArgumentNullException("primary");
if (secondary == null) throw new ArgumentNullException("secondary");
Primary = primary;
Secondary = secondary;
}
public Selector <HtmlNode> Before(ISelectorGenerator subgenerator)
{
return(nodes => nodes.SelectNonNull(parent =>
{
var end = IndexOfChild(subgenerator, parent, 0);
return end != null ? CreateNodesGroup(parent.OwnerDocument, parent.ChildNodes, 0, end.Value - 1, false) : null;
}));
}
public Selector <HtmlNode> Not(ISelectorGenerator subgenerator)
{
var castedGenerator = (SelectorGenerator <HtmlNode>)subgenerator;
var compiled = castedGenerator.Selector;
return(nodes =>
{
var matches = compiled(nodes.Select(x => x.ParentNode)).ToList();
return nodes.Except(matches);
});
}
/// <summary>
/// Initializes a new instance of <see cref="SelectorGeneratorTee"/>
/// with the two other <see cref="ISelectorGenerator"/> objects
/// it delegates to.
/// </summary>
public SelectorGeneratorTee(ISelectorGenerator primary, ISelectorGenerator secondary)
{
if (primary == null)
{
throw new ArgumentNullException("primary");
}
if (secondary == null)
{
throw new ArgumentNullException("secondary");
}
Primary = primary;
Secondary = secondary;
}
public Selector <HtmlNode> Between(ISelectorGenerator startGenerator, ISelectorGenerator endGenerator)
{
return(nodes => nodes.SelectNonNull(parent =>
{
var start = IndexOfChild(startGenerator, parent, 0);
if (start == null)
{
return null;
}
var end = IndexOfChild(endGenerator, parent, start.Value);
if (end == null)
{
return null;
}
return CreateNodesGroup(parent.OwnerDocument, parent.ChildNodes, start.Value + 1, end.Value - 1, null);
}));
}
private int?IndexOfChild(ISelectorGenerator subgenerator, HtmlNode parent, int startIndex)
{
var selector = GetSelector(subgenerator);
var children = parent.ChildNodes;
var limit = selector(new[] { parent })
.Select(x => new { Node = x, Position = children.IndexOf(x) })
.FirstOrDefault(x =>
{
if (x.Position == -1)
{
throw new FormatException("The limit node must be a direct child of the context node.");
}
return(x.Position >= startIndex);
});
return(limit != null ? limit.Position : (int?)null);
}
public void SplitBefore(ISelectorGenerator subgenerator)
{
Add(Ops.SplitBefore(subgenerator));
}
public void Has(ISelectorGenerator subgenerator)
{
Add(Ops.Has(subgenerator));
}
public void After(ISelectorGenerator subgenerator)
{
throw new NotImplementedException();
}
private IEnumerable <HtmlNode> Split(ISelectorGenerator subgenerator, HtmlNode parent, bool keepBefore, bool keepAfter)
{
var selector = GetSelector(subgenerator);
var children = parent.ChildNodes.ToArray();
var splitterPositions = new List <int>();
var splitterIndex = 0;
foreach (var splitter in selector(new[] { parent }))
{
splitterIndex = Array.IndexOf(children, splitter, splitterIndex);
if (splitterIndex == -1)
{
throw new FormatException("The node splitter must be a direct child of the context node.");
}
splitterPositions.Add(splitterIndex);
}
if (splitterPositions.Count == 0)
{
if (keepBefore && keepAfter)
{
yield return(parent);
}
yield break;
}
var doc = new HtmlDocument();
var keepSeparators = keepBefore != keepAfter;
if (keepBefore)
{
yield return(CreateNodesGroup(doc, children, 0, splitterPositions[0] + (keepSeparators ? 0 : -1)));
}
for (int i = 1; i < splitterPositions.Count; i++)
{
var indexBegin = splitterPositions[i - 1] + 1;
var indexEnd = splitterPositions[i] - 1;
if (keepSeparators)
{
if (keepAfter)
{
indexBegin--;
}
else
{
indexEnd++;
}
}
yield return(CreateNodesGroup(doc, children, indexBegin, indexEnd));
}
if (keepAfter)
{
yield return(CreateNodesGroup(doc, children, splitterPositions[splitterPositions.Count - 1] + (keepSeparators ? 0 : 1), children.Length - 1));
}
}
public void SplitAll(ISelectorGenerator subgenerator)
{
throw new NotImplementedException();
}
private Selector <HtmlNode> GetSelector(ISelectorGenerator subgenerator)
{
return(((SelectorGenerator <HtmlNode>)subgenerator).Selector);
}
public void Before(ISelectorGenerator subgenerator)
{
Add(Ops.Before(subgenerator));
}
public void Between(ISelectorGenerator startGenerator, ISelectorGenerator endGenerator)
{
Add(Ops.Between(startGenerator, endGenerator));
}
public void SplitBetween(ISelectorGenerator subgenerator)
{
Add(Ops.SplitBetween(subgenerator));
}
public void Between(ISelectorGenerator startGenerator, ISelectorGenerator endGenerator)
{
throw new NotImplementedException();
}
public Selector <XmlNode> Has(ISelectorGenerator subgenerator)
{
throw new NotImplementedException();
}
public void Not(ISelectorGenerator generator)
{
throw new NotImplementedException();
}
/// <summary>
/// Initializes a new instance of <see cref="SelectorGeneratorTee"/>
/// with the two other <see cref="ISelectorGenerator"/> objects
/// it delegates to.
/// </summary>
public SelectorGeneratorTee(ISelectorGenerator primary, ISelectorGenerator secondary)
{
Primary = primary ?? throw new ArgumentNullException(nameof(primary));
Secondary = secondary ?? throw new ArgumentNullException(nameof(secondary));
}
public void SplitAll(ISelectorGenerator subgenerator)
{
Add(Ops.SplitAll(subgenerator));
}
private Parser(Reader <Token> reader, ISelectorGenerator generator)
: this(reader, generator, true)
{
}
public void After(ISelectorGenerator subgenerator)
{
Add(Ops.After(subgenerator));
}
public Selector <HtmlNode> SplitAll(ISelectorGenerator subgenerator)
{
return(nodes => nodes.SelectMany(x => Split(subgenerator, x, true, true)));
}
public void Not(ISelectorGenerator subgenerator)
{
Add(Ops.Not(subgenerator));
}
public Selector <Control> Has(ISelectorGenerator subgenerator)
{
throw new NotImplementedException();
}
public Selector <HtmlNode> SplitBetween(ISelectorGenerator subgenerator)
{
return(nodes => nodes.SelectMany(x => Split(subgenerator, x, false, false)));
}
private IEnumerable <HtmlNode> Split(ISelectorGenerator subgenerator, HtmlNode parent, bool keepBefore, bool keepAfter, bool?rightEndOpen)
{
Selector <HtmlNode> compiled = this.GetSelector(subgenerator);
HtmlNode[] array = parent.ChildNodes.ToArray <HtmlNode>();
List <int> list = new List <int>();
int splitterIndex = 0;
foreach (HtmlNode current in compiled(new HtmlNode[]
{
parent
}))
{
#if SALTARELLE
splitterIndex = array.IndexOf(current, splitterIndex);
#else
splitterIndex = Array.IndexOf <HtmlNode>(array, current, splitterIndex);
#endif
if (splitterIndex == -1)
{
throw new FormatException("The node splitter must be a direct child of the context node.");
}
list.Add(splitterIndex);
}
if (list.Count == 0)
{
if (keepBefore & keepAfter)
{
yield return(parent);
}
yield break;
}
HtmlDocument ownerDocument = parent.OwnerDocument;
bool flag = keepBefore != keepAfter;
if (keepBefore)
{
yield return(this.CreateNodesGroup(ownerDocument, array, 0, list[0] + (flag ? 0 : -1), rightEndOpen));
}
int num4;
for (int i = 1; i < list.Count; i = num4 + 1)
{
int num2 = list[i - 1] + 1;
int num3 = list[i] - 1;
if (flag)
{
if (keepAfter)
{
num2--;
}
else
{
num3++;
}
}
yield return(this.CreateNodesGroup(ownerDocument, array, num2, num3, rightEndOpen));
num4 = i;
}
if (keepAfter)
{
yield return(this.CreateNodesGroup(ownerDocument, array, list[list.Count - 1] + (flag ? 0 : 1), array.Length - 1, rightEndOpen));
}
yield break;
}
