public void BindValue(object value)
{
var parent = _targetElement.Parent();
if (parent == null)
{
throw new NotSupportedException();
}
var text = (string)value;
if (parent.ElementTextMode() == TextMode.Preformated)
{
parent.AddTextNode(_targetElement.NodesIndexOfSelf(), HtmlEncoding.HtmlEncode(text));
_targetElement.Remove();
}
else
{
var encoded = HtmlEncoding.HtmlEncode(text);
encoded = encoded.Replace(" ", " ");
if (encoded.EndsWith(" "))
{
encoded = encoded.Substring(0, encoded.Length - 1) + " ";//如果末尾多出一个空格，则替换为
}
encoded = encoded.Replace("\r\n", "\n").Replace("\r", "\n");
encoded = encoded.Replace("\n", "<br />");
_targetElement.ReplaceWith(encoded);
}
}
private static string CreateIdentity(IHtmlElement element, bool ancestorsCreate)
{
string parentId;
var parentElement = element.Parent();
if (parentElement != null)
{
parentId = Identity(parentElement);
if (parentId == null)
{
if (ancestorsCreate)
{
parentId = Identity(parentElement, true, true);
}
else
{
parentId = CreateIdentity(parentElement, false);
}
}
}
else
{
if (element.Container is IHtmlDocument)
{
parentId = null;
}
else
{
throw new InvalidOperationException();
}
}
var name = GetElementName(element);
var builder = new StringBuilder();
if (!string.IsNullOrEmpty(parentId))
{
builder.AppendFormat("{0}_", parentId);
}
builder.Append(name);
if (element.Siblings().Where(e => GetElementName(e).EqualsIgnoreCase(GetElementName(element))).IsSingle())
{
return(builder.ToString());
}
var index = element.SiblingsBeforeSelf().Count(e => GetElementName(e).EqualsIgnoreCase(GetElementName(element)));
builder.Append(index + 1);
var identity = builder.ToString();
return(EnsureUniqueness(identity, element.Document));
}
protected override bool IsEligible( ISelector leftSelector, IHtmlElement element )
{
var restrict = leftSelector as ContainerRestrict;
if ( restrict != null )
return restrict.RestrictContainer.Nodes().Contains( element );
return leftSelector.IsEligibleBuffered( element.Parent() );
}
protected override bool IsEligible(ISelector leftSelector, IHtmlElement element)
{
var restrict = leftSelector as ContainerRestrict;
if (restrict != null)
{
return(restrict.RestrictContainer.Nodes().Contains(element));
}
return(leftSelector.IsEligibleBuffered(element.Parent()));
}
protected override bool IsEligible(ISelector leftSelector, IHtmlElement element)
{
var restrict = leftSelector as ContainerRestrict;
if (restrict != null)
{
return(element.IsDescendantOf(restrict.RestrictContainer));
}
var parant = element.Parent();
//如果父级元素符合左选择器，或者父级元素符合本选择器。
return(leftSelector.IsEligibleBuffered(parant) || this.IsEligibleBuffered(parant));
}
/// <summary>
/// 获取所有的父代元素以及元素自身
/// </summary>
/// <param name="element">要获取父代元素及自身的元素</param>
/// <returns>元素的所有父代元素和自身的集合</returns>
public static IEnumerable <IHtmlElement> AncestorsAndSelf(this IHtmlElement element)
{
EnsureAvaliable(element);
while (true)
{
if (element == null)
{
yield break;
}
yield return(element);
element = element.Parent();
}
}
private static string CreateIdentity( IHtmlElement element, bool ancestorsCreate )
{
string parentId;
var parentElement = element.Parent();
if ( parentElement != null )
{
parentId = Identity( parentElement );
if ( parentId == null )
{
if ( ancestorsCreate )
parentId = Identity( parentElement, true, true );
else
parentId = CreateIdentity( parentElement, false );
}
}
else
{
if ( element.Container is IHtmlDocument )
parentId = null;
else
throw new InvalidOperationException();
}
var name = GetElementName( element );
var builder = new StringBuilder();
if ( !string.IsNullOrEmpty( parentId ) )
builder.AppendFormat( "{0}_", parentId );
builder.Append( name );
string identity;
if ( element.Siblings().Where( e => GetElementName( e ).EqualsIgnoreCase( GetElementName( element ) ) ).IsSingle() )
identity = builder.ToString();
var index = element.SiblingsBeforeSelf().Count( e => GetElementName( e ).EqualsIgnoreCase( GetElementName( element ) ) );
builder.Append( index + 1 );
identity = builder.ToString();
return EnsureUniqueness( identity, element.Document );
}
protected override bool IsEligible( ISelector leftSelector, IHtmlElement element )
{
var restrict = leftSelector as ContainerRestrict;
if ( restrict != null )
return element.IsDescendantOf( restrict.RestrictContainer );
var parant = element.Parent();
//如果父级元素符合左选择器，或者父级元素符合本选择器。
return leftSelector.IsEligibleBuffered( parant ) || this.IsEligibleBuffered( parant );
}