/// <summary>
/// Read styles defined inside the dom structure in links and style elements.<br/>
/// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/>
/// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/>
/// </summary>
/// <param name="box">the box to parse style data in</param>
/// <param name="htmlContainer">the html container to use for reference resolve</param>
/// <param name="cssData">the style data to fill with found styles</param>
/// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param>
private void CascadeParseStyles(CssBox box, HtmlContainerInt htmlContainer, ref CssData cssData, ref bool cssDataChanged)
{
if (box.HtmlTag != null)
{
// Check for the <link rel=stylesheet> tag
if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) &&
box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase))
{
CloneCssData(ref cssData, ref cssDataChanged);
string stylesheet;
CssData stylesheetData;
StylesheetLoadHandler.LoadStylesheet(htmlContainer, box.GetAttribute("href", string.Empty), box.HtmlTag.Attributes, out stylesheet, out stylesheetData);
if (stylesheet != null)
{
_cssParser.ParseStyleSheet(cssData, stylesheet);
}
else if (stylesheetData != null)
{
cssData.Combine(stylesheetData);
}
}
// Check for the <style> tag
if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count > 0)
{
CloneCssData(ref cssData, ref cssDataChanged);
foreach (var child in box.Boxes)
{
_cssParser.ParseStyleSheet(cssData, child.Text.CutSubstring());
}
}
}
foreach (var childBox in box.Boxes)
{
CascadeParseStyles(childBox, htmlContainer, ref cssData, ref cssDataChanged);
}
}
/// <summary>
/// Read styles defined inside the dom structure in links and style elements.<br/>
/// If the html tag is "style" tag parse it content and add to the css data for all future tags parsing.<br/>
/// If the html tag is "link" that point to style data parse it content and add to the css data for all future tags parsing.<br/>
/// </summary>
/// <param name="box">the box to parse style data in</param>
/// <param name="htmlContainer">the html container to use for reference resolve</param>
/// <param name="cssData">the style data to fill with found styles</param>
/// <param name="cssDataChanged">check if the css data has been modified by the handled html not to change the base css data</param>
private void CascadeParseStyles(CssBox box, HtmlContainerInt htmlContainer, CssDataWithChanged cssData)
{
if (box.HtmlTag != null)
{
// Check for the <link rel=stylesheet> tag
if (box.HtmlTag.Name.Equals("link", StringComparison.CurrentCultureIgnoreCase) &&
box.GetAttribute("rel", string.Empty).Equals("stylesheet", StringComparison.CurrentCultureIgnoreCase))
{
cssData.CloneCssData();
var stylesheetData = htmlContainer.ResourceServer.GetCssData(box.GetAttribute("href", string.Empty), box.HtmlTag.Attributes);
/*
* string stylesheet;
* CssData stylesheetData;
* StylesheetLoadHandler.LoadStylesheet(htmlContainer,
* box.GetAttribute("href", string.Empty),
* box.HtmlTag.Attributes, out stylesheet, out stylesheetData);
*/
/*
* if (stylesheet != null)
* _cssParser.ParseStyleSheet(cssData, stylesheet);
* else */
if (stylesheetData != null)
{
cssData.cssData.Combine(stylesheetData);
}
}
// Check for the <style> tag
if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count > 0)
{
cssData.CloneCssData();
foreach (var child in box.Boxes)
{
_cssParser.ParseStyleSheet(cssData.cssData, child.Text.CutSubstring());
}
}
}
foreach (var childBox in box.Boxes)
{
CascadeParseStyles(childBox, htmlContainer, cssData);
}
}
/// <summary>
/// Parse the given stylesheet to <see cref="CssData"/> object.<br/>
/// If <paramref name="combineWithDefault"/> is true the parsed css blocks are added to the
/// default css data (as defined by W3), merged if class name already exists. If false only the data in the given stylesheet is returned.
/// </summary>
/// <seealso cref="http://www.w3.org/TR/CSS21/sample.html"/>
/// <param name="adapter">Platform adapter</param>
/// <param name="stylesheet">the stylesheet source to parse</param>
/// <param name="combineWithDefault">true - combine the parsed css data with default css data, false - return only the parsed css data</param>
/// <returns>the parsed css data</returns>
public static CssData Parse(RAdapter adapter, string stylesheet, bool combineWithDefault = true)
{
CssParser parser = new CssParser(adapter);
return parser.ParseStyleSheet(stylesheet, combineWithDefault);
}
