/*
move presentation attribs from body to style element
background="foo" -> body { background-image: url(foo) }
bgcolor="foo" -> body { background-color: foo }
text="foo" -> body { color: foo }
link="foo" -> :link { color: foo }
vlink="foo" -> :visited { color: foo }
alink="foo" -> :active { color: foo }
*/
private void CleanBodyAttrs(Lexer lexer, Node body)
{
AttVal attr;
string bgurl = null;
string bgcolor = null;
string color = null;
attr = body.GetAttrByName("background");
if (attr != null)
{
bgurl = attr.Val;
attr.Val = null;
body.RemoveAttribute(attr);
}
attr = body.GetAttrByName("bgcolor");
if (attr != null)
{
bgcolor = attr.Val;
attr.Val = null;
body.RemoveAttribute(attr);
}
attr = body.GetAttrByName("text");
if (attr != null)
{
color = attr.Val;
attr.Val = null;
body.RemoveAttribute(attr);
}
if (bgurl != null || bgcolor != null || color != null)
{
lexer.AddStringLiteral(" body {\n");
if (bgurl != null)
{
lexer.AddStringLiteral(" background-image: url(");
lexer.AddStringLiteral(bgurl);
lexer.AddStringLiteral(");\n");
}
if (bgcolor != null)
{
lexer.AddStringLiteral(" background-color: ");
lexer.AddStringLiteral(bgcolor);
lexer.AddStringLiteral(";\n");
}
if (color != null)
{
lexer.AddStringLiteral(" color: ");
lexer.AddStringLiteral(color);
lexer.AddStringLiteral(";\n");
}
lexer.AddStringLiteral(" }\n");
}
attr = body.GetAttrByName("link");
if (attr != null)
{
AddColorRule(lexer, " :link", attr.Val);
body.RemoveAttribute(attr);
}
attr = body.GetAttrByName("vlink");
if (attr != null)
{
AddColorRule(lexer, " :visited", attr.Val);
body.RemoveAttribute(attr);
}
attr = body.GetAttrByName("alink");
if (attr != null)
{
AddColorRule(lexer, " :active", attr.Val);
body.RemoveAttribute(attr);
}
}
/*
Find style attribute in node, and replace it
by corresponding class attribute. Search for
class in style dictionary otherwise gensym
new class and add to dictionary.
Assumes that node doesn't have a class attribute
*/
private void Style2Rule(Lexer lexer, Node node)
{
AttVal styleattr, classattr;
string classname;
styleattr = node.GetAttrByName("style");
if (styleattr != null)
{
classname = FindStyle(lexer, node.Element, styleattr.Val);
classattr = node.GetAttrByName("class");
/*
if there already is a class attribute
then append class name after a space
*/
if (classattr != null)
{
classattr.Val = classattr.Val + " " + classname;
node.RemoveAttribute(styleattr);
}
else
{
/* reuse style attribute for class attribute */
styleattr.Attribute = "class";
styleattr.Val = classname;
}
}
}
public virtual void CleanImgAttrs(Node node)
{
while (node != null)
{
if (node.Tag == _tt.TagImg)
{
string style = string.Empty;
AttVal attr = node.GetAttrByName("border");
if (attr != null)
{
style += "border-width:" + attr.Val + ";";
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("align");
if (attr != null)
{
style += "float:" + attr.Val + ";";
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("height");
if (attr != null)
{
style += "height:" + attr.Val + ";";
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("width");
if (attr != null)
{
style += "width:" + attr.Val + ";";
attr.Val = null;
node.RemoveAttribute(attr);
}
//xhtml requires the alt attribute
attr = node.GetAttrByName("alt");
if (attr == null)
{
node.AddAttribute("alt", string.Empty);
}
attr = node.GetAttrByName("style");
if (style.Length > 0)
{
if (attr != null && !string.IsNullOrEmpty(attr.Val))
{
style = style + attr.Val;
attr.Val = null;
node.RemoveAttribute(attr);
}
node.AddAttribute("style", style);
}
}
if (node.Content != null)
{
CleanImgAttrs(node.Content);
}
node = node.Next;
}
}
public virtual void CleanTableAttrs(Node node)
{
while (node != null)
{
if (node.Tag == _tt.TagTr || node.Tag == _tt.TagTh || node.Tag == _tt.TagTd) //TODO: add tbody?
{
AttVal attr;
string bgurl = null;
string bgcolor = null;
string height = null;
string width = null;
attr = node.GetAttrByName("background");
if (attr != null)
{
bgurl = attr.Val;
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("bgcolor");
if (attr != null)
{
bgcolor = attr.Val;
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("width");
if (attr != null)
{
width = attr.Val;
attr.Val = null;
node.RemoveAttribute(attr);
}
attr = node.GetAttrByName("height");
if (attr != null)
{
height = attr.Val;
attr.Val = null;
node.RemoveAttribute(attr);
}
if (bgurl != null || bgcolor != null || width != null || height != null)
{
string style = string.Empty;
if (bgurl != null)
{
style += "background-image:url(" + bgurl + ");";
}
if (bgcolor != null)
{
style += "background-color:"+ bgcolor +";";
}
if (width != null)
{
style += "width:" + width + ";";
}
if (height != null)
{
style += "height:" + height + ";";
}
node.AddAttribute("style", style);
}
}
if (node.Content != null)
{
CleanTableAttrs(node.Content);
}
node = node.Next;
}
}
public virtual void CleanAnchorTarget(Node node)
{
while (node != null)
{
if (node.Tag == _tt.TagA)
{
AttVal attr = node.GetAttrByName("target");
if (attr != null)
{
if (attr.Val.ToLower() == "_blank")
{
AttVal rel = node.GetAttrByName("rel");
if (rel == null) node.AddAttribute("rel", "external");
else rel.Val += " external";
}
node.RemoveAttribute(attr);
}
}
if (node.Content != null)
{
CleanAnchorTarget(node.Content);
}
node = node.Next;
}
}