/// <inheritdoc />
public override IEnumerable <T> Execute(string query)
{
var navigator = _node.GetNavigator();
var nodes = navigator.Select(query);
var htmlElements =
(from IXPathNavigable node in nodes select _page.ElementFactory.Create <T>(_page, node)).ToList();
var radioButtonNames = new List <string>();
// Radio buttons are expressed as multiple HTML tags, but need to be returned as a single HtmlRadioButton instance
// The factory above has already created multiple instances based on the multiple nodes found
// so we now need to find any radio buttons and filter out the duplicates
// This is a little inefficient because there is the overhead of creating and initializing the radio button
// multiple times however this code is much cleaner
foreach (var element in htmlElements)
{
var radioButton = element as HtmlRadioButton;
if (radioButton == null)
{
// Not a radio button so no filtering is required
yield return(element);
}
else if (radioButtonNames.Contains(radioButton.Name) == false)
{
radioButtonNames.Add(radioButton.Name);
yield return(element);
}
}
}
/// <summary>
/// Determines whether the specified navigable has the specified attribute.
/// </summary>
/// <param name="navigable">
/// The navigable.
/// </param>
/// <param name="name">
/// The name.
/// </param>
/// <returns>
/// <c>true</c> if the specified navigable has the attribute; otherwise, <c>false</c>.
/// </returns>
public static bool HasAttribute(this IXPathNavigable navigable, string name)
{
var navigator = navigable.GetNavigator();
var checkedFound = navigator.MoveToAttribute(name, string.Empty);
return(checkedFound);
}
/// <summary>
/// Builds the supported tags message.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <param name="tags">
/// The tags.
/// </param>
/// <returns>
/// A <see cref="string"/> value.
/// </returns>
private static string BuildSupportedTagsMessage(IXPathNavigable node, IEnumerable <SupportedTagAttribute> tags)
{
var supportedTags = tags.Select(x => x.ToString()).Aggregate((i, j) => i + Environment.NewLine + j);
var navigator = node.GetNavigator();
var message = string.Format(
CultureInfo.CurrentCulture,
"The specified '{0}' element is invalid. The supported tags for this node are: {1}",
navigator.Name,
supportedTags);
return(message);
}
/// <summary>
/// Sets the selected.
/// </summary>
/// <param name="navigable">
/// The navigable.
/// </param>
/// <param name="value">
/// if set to <c>true</c> [value].
/// </param>
public static void SetSelected(this IXPathNavigable navigable, bool value)
{
var navigator = navigable.GetNavigator();
var hasAttribute = navigator.MoveToAttribute("selected", string.Empty);
if (hasAttribute == value)
{
// No change is required
return;
}
if (value)
{
// Set the attribute
navigator.SetAttribute(string.Empty, "selected", string.Empty, "selected");
}
else
{
// Remove the checked attribute if it exists
navigator.DeleteSelf();
}
}
public static Type FindBestMatchingType(this Type elementType, IXPathNavigable node)
{
if (elementType == null)
{
throw new ArgumentNullException("elementType");
}
if (node == null)
{
throw new ArgumentNullException("node");
}
var navigator = node.GetNavigator();
var possibleTypes = GetMatchingTypes(elementType).ToList();
var matchingTypes = new List<Type>();
// The node name should already be folded to lower case when the HTML was read
var nodeName = navigator.Name;
foreach (var possibleType in possibleTypes)
{
var attributes =
possibleType.GetCustomAttributes(typeof(SupportedTagAttribute), true)
.OfType<SupportedTagAttribute>();
foreach (var attribute in attributes)
{
if (nodeName.Equals(attribute.TagName, StringComparison.OrdinalIgnoreCase) == false)
{
continue;
}
if (attribute.HasAttributeFilter)
{
// The attribute name should already be folded to lower case when the HTML was read
var queryAttributeName = attribute.AttributeName.ToLowerInvariant();
var matchingAttribute = navigator.GetAttribute(queryAttributeName, string.Empty);
if (matchingAttribute.Equals(attribute.AttributeValue, StringComparison.OrdinalIgnoreCase))
{
matchingTypes.Add(possibleType);
}
}
else
{
matchingTypes.Add(possibleType);
}
}
}
if (matchingTypes.Count == 0)
{
return typeof(AnyHtmlElement);
}
if (matchingTypes.Count > 1)
{
var matchingTypeNames = matchingTypes.Aggregate(string.Empty, (x, y) => x + Environment.NewLine + y);
var message = string.Format(
CultureInfo.CurrentCulture,
Resources.TypeExtensions_MultipleTypeMatchesForNode,
elementType.FullName,
navigator.OuterXml,
matchingTypeNames);
throw new InvalidHtmlElementMatchException(message);
}
return matchingTypes[0];
}
public static Type FindBestMatchingType(this Type elementType, IXPathNavigable node)
{
if (elementType == null)
{
throw new ArgumentNullException("elementType");
}
if (node == null)
{
throw new ArgumentNullException("node");
}
var navigator = node.GetNavigator();
var possibleTypes = GetMatchingTypes(elementType).ToList();
var matchingTypes = new List <Type>();
// The node name should already be folded to lower case when the HTML was read
var nodeName = navigator.Name;
foreach (var possibleType in possibleTypes)
{
var attributes =
possibleType.GetCustomAttributes(typeof(SupportedTagAttribute), true)
.OfType <SupportedTagAttribute>();
foreach (var attribute in attributes)
{
if (nodeName.Equals(attribute.TagName, StringComparison.OrdinalIgnoreCase) == false)
{
continue;
}
if (attribute.HasAttributeFilter)
{
// The attribute name should already be folded to lower case when the HTML was read
var queryAttributeName = attribute.AttributeName.ToLowerInvariant();
var matchingAttribute = navigator.GetAttribute(queryAttributeName, string.Empty);
if (matchingAttribute.Equals(attribute.AttributeValue, StringComparison.OrdinalIgnoreCase))
{
matchingTypes.Add(possibleType);
}
}
else
{
matchingTypes.Add(possibleType);
}
}
}
if (matchingTypes.Count == 0)
{
return(typeof(AnyHtmlElement));
}
if (matchingTypes.Count > 1)
{
var matchingTypeNames = matchingTypes.Aggregate(string.Empty, (x, y) => x + Environment.NewLine + y);
var message = string.Format(
CultureInfo.CurrentCulture,
Resources.TypeExtensions_MultipleTypeMatchesForNode,
elementType.FullName,
navigator.OuterXml,
matchingTypeNames);
throw new InvalidHtmlElementMatchException(message);
}
return(matchingTypes[0]);
}
/// <summary>
/// Builds the supported tags message.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <param name="tags">
/// The tags.
/// </param>
/// <returns>
/// A <see cref="string"/> value.
/// </returns>
private static string BuildSupportedTagsMessage(IXPathNavigable node, IEnumerable<SupportedTagAttribute> tags)
{
var supportedTags = tags.Select(x => x.ToString()).Aggregate((i, j) => i + Environment.NewLine + j);
var navigator = node.GetNavigator();
var message = string.Format(
CultureInfo.CurrentCulture,
"The specified '{0}' element is invalid. The supported tags for this node are: {1}",
navigator.Name,
supportedTags);
return message;
}
