private void InterpretStyles(HtmlNode htmlNode)
{
string style;
if (!HtmlStyle.IsNonStyleElement(htmlNode.Tag))
{
if (htmlNode.Attributes.TryGetValue("style", out style))
{
CSSParser cssParser = new CSSParser();
htmlNode.AddStyles(cssParser.ParseRules(style, SelectorType.Inline));
}
Parse(htmlNode);
}
foreach (HtmlNode node in htmlNode.GetChildren())
{
InterpretStyles(node);
}
//This loop only needs when the parent is null. If parent is not null, it will loop through all the
//child elements thus next nodes processed without this loop.
if (htmlNode.Parent == null && htmlNode.Next != null)
{
InterpretStyles(htmlNode.GetNext());
}
}
private void ApplyToChildren(HtmlNode node, List<HtmlStyle> htmlStyles)
{
if (IsValidNode(node))
{
ApplyStyle(node, htmlStyles);
foreach (HtmlNode child in node.GetChildren())
{
ApplyToChildren(child, htmlStyles);
}
}
}
private void ApplyStyle(CSSelector nextSelector, Specificity specificity, HtmlNode node, List<HtmlStyle> htmlStyles)
{
if (nextSelector.IsValidNode(node))
{
nextSelector.AddSpecificity(specificity);
nextSelector.Parse(node, htmlStyles);
}
foreach (HtmlNode child in node.GetChildren())
{
ApplyStyle(nextSelector.Clone(), specificity, child, htmlStyles);
}
}
internal override void Parse(HtmlNode node, Specificity specificity, List<HtmlStyle> htmlStyles)
{
CSSelector nextSelector;
if (context.ParseSelector(this.selectorText, out nextSelector))
{
if (nextSelector != null)
{
foreach (HtmlNode child in node.GetChildren())
{
CSSelector clone = nextSelector.Clone();
ApplyStyle(clone, specificity, child, htmlStyles);
}
}
}
}
internal void ParseStyle(HtmlNode node)
{
foreach (CSSProperty property in properties)
{
property.ParseStyle(node);
}
foreach (HtmlNode child in node.GetChildren())
{
ParseStyle(child);
}
if (node.Parent == null && node.Next != null)
{
ParseStyle(node.GetNext());
}
}
private void TraverseHtmlNodes(HtmlNode node, StyleSheet styleSheet)
{
string style = string.Empty;
if (string.Compare(node.Tag, HtmlTag.STYLE, StringComparison.InvariantCultureIgnoreCase) == 0)
{
style = node.InnerHtml == null ? string.Empty : node.InnerHtml.Trim();
}
else if (string.Compare(node.Tag, HtmlTag.LINK, StringComparison.InvariantCultureIgnoreCase) == 0)
{
string relValue = node.ExtractAttributeValue("rel");
string media = node.ExtractAttributeValue("media");
if (string.Compare(rel, relValue, StringComparison.InvariantCultureIgnoreCase) == 0 &&
(string.IsNullOrEmpty(media) || media.CompareInvariantCultureIgnoreCase("screen")
|| media.CompareInvariantCultureIgnoreCase("all")))
{
string url = node.ExtractAttributeValue("href");
if (!string.IsNullOrEmpty(url))
{
WebManager web = new WebManager(uriSchema, baseUrl);
style = web.ExtractStylesFromLink(url);
}
}
}
if (!string.IsNullOrEmpty(style))
{
List<CSSElement> styles = new List<CSSElement>();
List<MediaQuery> mediaQueries = new List<MediaQuery>();
CSSParser parser = new CSSParser();
parser.ParseCSS(style, styles, mediaQueries);
styleSheet.AddRange(styles);
styleSheet.AddMediaQueryRange(mediaQueries);
}
foreach (HtmlNode n in node.GetChildren())
{
TraverseHtmlNodes(n, styleSheet);
}
}
internal override void Parse(HtmlNode node, Specificity specificity, List<HtmlStyle> htmlStyles)
{
if (node.HasChildren)
{
CSSelector nextSelector;
if (context.ParseSelector(this.selectorText, out nextSelector))
{
if (nextSelector != null)
{
foreach (HtmlNode child in node.GetChildren())
{
if (nextSelector.IsValidNode(child))
{
nextSelector.AddSpecificity(specificity);
nextSelector.Parse(child, htmlStyles);
}
}
}
}
}
}
private void ApplyToChild(HtmlNode node, List<HtmlStyle> htmlStyles)
{
if (node == null)
{
return;
}
if (!node.HasChildren)
{
return;
}
if (node.GetChildren().Count < this.position)
{
return;
}
HtmlNode pNode = GetNodeAtPosition(position, node);
if (pNode != null)
{
ApplyStyle(pNode, htmlStyles);
}
}
private void ApplyToChildren(HtmlNode node, HtmlNode parent)
{
if (node == null)
{
return;
}
if (parent != null)
{
node.ImportInheritedStyles(parent.InheritedHtmlStyles);
AppendStyles(node, parent);
UpdateCurrentNodeInheritedStyles(node);
InheritFromParent(node, parent);
}
foreach (HtmlNode child in node.GetChildren())
{
ApplyToChildren(child, node);
}
if (node.Parent == null && node.Next != null)
{
ApplyToChildren(node.GetNext(), parent);
}
}
void IAttachedSelector.Parse(HtmlNode node, List<HtmlStyle> htmlStyles)
{
if (string.IsNullOrEmpty(this.selectorText))
{
foreach (HtmlNode child in node.GetChildren())
{
ApplyToChildren(child, htmlStyles);
}
}
else
{
context.ParseBehavior(this.selectorText, CalculateSpecificity(SelectorType.PseudoClass), node, htmlStyles);
}
}
bool IAttachedSelector.IsValidNode(HtmlNode node)
{
if (node == null)
{
return false;
}
return node.GetChildren().Count > 0;
}