private void LoadImports(List <string> imports, CssBox box, CssData cssData, HtmlContainerInt htmlContainer)
{
foreach (var import in imports)
{
string stylesheet;
CssData stylesheetData;
StylesheetLoadHandler.LoadStylesheet(htmlContainer, import, box.HtmlTag.Attributes, out stylesheet, out stylesheetData);
if (stylesheet != null)
{
var innerImports = new List <string>();
CssData innerData = new CssData();
_cssParser.ParseStyleSheet(innerData, stylesheet, ref innerImports);
cssData.Combine(innerData);
if (innerImports.Count > 0)
{
LoadImports(innerImports, box, cssData, htmlContainer);
}
}
else if (stylesheetData != null)
{
cssData.Combine(stylesheetData);
}
}
}
/// <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)
{
var imports = new List <string>();
_cssParser.ParseStyleSheet(cssData, stylesheet, ref imports);
LoadImports(imports, box, cssData, htmlContainer);
}
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)
{
var imports = new List <string>();
_cssParser.ParseStyleSheet(cssData, child.Text.CutSubstring(), ref imports);
LoadImports(imports, box, cssData, htmlContainer);
}
}
}
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, 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>
/// Applies style to all boxes in the tree.<br/>
/// If the html tag has style defined for each apply that style to the css box of the tag.<br/>
/// If the html tag has "class" attribute and the class name has style defined apply that style on the tag css box.<br/>
/// If the html tag has "style" attribute parse it and apply the parsed style on the tag css box.<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"></param>
/// <param name="htmlContainer">the html container to use for reference resolve</param>
/// <param name="cssData"> </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 static void CascadeStyles(CssBox box, HtmlContainer htmlContainer, ref CssData cssData,
ref bool cssDataChanged)
{
box.InheritStyle();
if (box.HtmlTag != null)
{
// try assign style using the html element tag
AssignCssBlocks(box, cssData, box.HtmlTag.Name);
// try assign style using the "class" attribute of the html element
if (box.HtmlTag.HasAttribute("class"))
{
AssignClassCssBlocks(box, cssData);
}
// try assign style using the "id" attribute of the html element
if (box.HtmlTag.HasAttribute("id"))
{
string id = box.HtmlTag.TryGetAttribute("id");
AssignCssBlocks(box, cssData, "#" + id);
}
TranslateAttributes(box.HtmlTag, box);
// Check for the style="" attribute
if (box.HtmlTag.HasAttribute("style"))
{
CssBlock block = CssParser.ParseCssBlock(box.HtmlTag.Name, box.HtmlTag.TryGetAttribute("style"));
AssignCssBlock(box, block);
}
// Check for the <style> tag
if (box.HtmlTag.Name.Equals("style", StringComparison.CurrentCultureIgnoreCase) && box.Boxes.Count == 1)
{
CloneCssData(ref cssData, ref cssDataChanged);
CssParser.ParseStyleSheet(cssData, box.Boxes[0].Text.CutSubstring());
}
// 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);
}
}
}
// cascade text decoration only to boxes that actually have text so it will be handled correctly.
if (box.TextDecoration != String.Empty && box.Text == null)
{
foreach (CssBox childBox in box.Boxes)
{
childBox.TextDecoration = box.TextDecoration;
}
box.TextDecoration = string.Empty;
}
foreach (CssBox childBox in box.Boxes)
{
CascadeStyles(childBox, htmlContainer, ref cssData, ref cssDataChanged);
}
}