public CssAnalyseArgs(Document document, CssAnalyserTargets target, ICssNode node, IElement element)
: base(document)
{
Target = target;
Node = node;
Element = element;
}
/// <summary>
/// Gets all descendents of the provided node.
/// </summary>
/// <param name="node">The node to examine.</param>
/// <returns>An iterator over all contained nodes.</returns>
public static IEnumerable <ICssNode> GetAllDescendents(this ICssNode node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
return(node.Children.SelectMany(m => m.GetAllDescendents()));
}
private static string GetExcerpt(ICssNode node)
{
if (node == null)
{
return(null);
}
return(node.ToCss());
}
private void HandleCss(Document document, string baseUrl, ICssNode node, CancellationToken ct)
{
GatherUrls(document, baseUrl, node, ct);
foreach (var child in node.Children)
{
HandleCss(document, baseUrl, child, ct);
}
}
void Setup(ICssNode child)
{
var rule = child as CssRule;
if (rule != null)
{
rule.Owner = this as ICssStyleSheet;
rule.Parent = this as ICssRule;
}
}
void Teardown(ICssNode child)
{
var rule = child as CssRule;
if (rule != null)
{
rule.Parent = null;
rule.Owner = null;
}
}
protected void ReplaceAll(ICssNode node)
{
Clear();
_source = node.SourceCode;
foreach (var child in node.Children)
{
AppendChild(child);
}
}
public void InsertBefore(ICssNode referenceChild, ICssNode child)
{
if (referenceChild != null)
{
var index = _children.IndexOf(referenceChild);
InsertChild(index, child);
}
else
{
AppendChild(child);
}
}
public void InsertBefore(ICssNode referenceChild, ICssNode child)
{
if (referenceChild != null)
{
var index = _children.IndexOf(referenceChild);
InsertChild(index, child);
}
else
{
AppendChild(child);
}
}
public void ReplaceChild(ICssNode oldChild, ICssNode newChild)
{
for (var i = 0; i < _children.Count; i++)
{
if (Object.ReferenceEquals(oldChild, _children[i]))
{
Teardown(oldChild);
Setup(newChild);
_children[i] = newChild;
return;
}
}
}
public void ReplaceChild(ICssNode oldChild, ICssNode newChild)
{
for (var i = 0; i < _children.Count; i++)
{
if (Object.ReferenceEquals(oldChild, _children[i]))
{
Teardown(oldChild);
Setup(newChild);
_children[i] = newChild;
return;
}
}
}
/// <summary>
/// Gets all descendents of the provided node.
/// </summary>
/// <param name="node">The node to examine.</param>
/// <returns>An iterator over all contained nodes.</returns>
public static IEnumerable <T> GetAll <T>(this ICssNode node)
where T : IStyleFormattable
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (node is T)
{
yield return((T)node);
}
foreach (var entity in node.Children.SelectMany(m => m.GetAll <T>()))
{
yield return(entity);
}
}
protected void ReplaceSingle(ICssNode oldNode, ICssNode newNode)
{
if (oldNode != null)
{
if (newNode != null)
{
ReplaceChild(oldNode, newNode);
}
else
{
RemoveChild(oldNode);
}
}
else if (newNode != null)
{
AppendChild(newNode);
}
}
private void GatherUrls(Document document, string baseUrl, ICssNode node, CancellationToken ct)
{
if (node is ICssProperty propertyRule)
{
string value = propertyRule.Value;
if (value != null)
{
var parts = value.Split(',');
foreach (var part in parts)
{
var url = Utilities.ParseCssUrl(part);
if (url != null)
{
var finalUrl = GetAbsoluteUrl(new Url(baseUrl ?? document.Url), url);
Enqueue(document, finalUrl, propertyRule, ct);
}
}
}
}
}
private AnalyserResultItem CreateEmptyRuleResultItem(CssAnalyseArgs args, ICssNode node)
{
string excerpt = null;
if (args.Target == CssAnalyserTargets.HtmlStyleAttribute)
{
excerpt = args.Element.OuterHtml;
}
if (excerpt == null)
{
excerpt = node.ToCss();
}
return(new AnalyserResultItem()
{
Category = Categories.Performance,
Type = AnalyserResultType.Warning,
Message = "Rule is empty",
Excerpt = excerpt
});
}
private void Enqueue(Document document, string url, ICssNode node, CancellationToken ct)
{
Enqueue(document, url, null, GetExcerpt(node), ct);
}
public void RemoveChild(ICssNode child)
{
Teardown(child);
_children.Remove(child);
}
protected void ReplaceAll(ICssNode node)
{
Clear();
_source = node.SourceCode;
foreach (var child in node.Children)
{
AppendChild(child);
}
}
protected void ReplaceSingle(ICssNode oldNode, ICssNode newNode)
{
if (oldNode != null)
{
if (newNode != null)
{
ReplaceChild(oldNode, newNode);
}
else
{
RemoveChild(oldNode);
}
}
else if (newNode != null)
{
AppendChild(newNode);
}
}
public void RemoveChild(ICssNode child)
{
Teardown(child);
_children.Remove(child);
}
/// <summary>
/// Gets the comments contained in the sheet, if any.
/// </summary>
/// <param name="node">The node to examine.</param>
/// <returns>An iterator over all comments.</returns>
public static IEnumerable <ICssComment> GetComments(this ICssNode node)
{
return(node.GetAll <ICssComment>());
}
void Setup(ICssNode child)
{
var rule = child as CssRule;
if (rule != null)
{
rule.Owner = this as ICssStyleSheet;
rule.Parent = this as ICssRule;
}
}
public void InsertChild(Int32 index, ICssNode child)
{
Setup(child);
_children.Insert(index, child);
}
void Teardown(ICssNode child)
{
var rule = child as CssRule;
if (rule != null)
{
rule.Parent = null;
rule.Owner = null;
}
}
public void AppendChild(ICssNode child)
{
Setup(child);
_children.Add(child);
}
public void AppendChild(ICssNode child)
{
Setup(child);
_children.Add(child);
}
public void InsertChild(Int32 index, ICssNode child)
{
Setup(child);
_children.Insert(index, child);
}
public CssAnalyseArgs(Document document, CssAnalyserTargets target, ICssNode node)
: this(document, target, node, null)
{
}