public bool RemoveAttribute(string attrName, int startIndex)
{
Attr[] attributes = Attributes;
for (int i = startIndex; i < attributes.Length; i++)
{
Attr attr = attributes[i];
if (attr != null && attr.NameEquals(attrName))
{
attributes[i] = null;
return(true);
}
}
return(false);
}
public Attr GetAttribute(string attrName, bool allowNoValue, int startIndex, out int foundAt)
{
foundAt = -1;
if (attrName == null)
{
return(null);
}
Attr[] attributes = Attributes;
for (int i = startIndex; i < attributes.Length; i++)
{
Attr attr = attributes[i];
if (attr != null && attr.NameEquals(attrName) && (allowNoValue || attr.Value != null))
{
foundAt = i;
return(attr);
}
}
return(null);
}
protected abstract string OnMatchingAttr(BeginTag tag, Attr attr);
protected abstract string OnMatchingAttr(BeginTag tag, Attr attr);
/// <summary>
/// Write a begin tag to the StringBuilder. Attributes will be
/// filtered according to the provided TagDesc, if any.
/// </summary>
private void WriteBeginTag(TagDesc desc, string tagName, Attr[] attributes, StringBuilder output)
{
output.Append("<" + tagName);
for (int i = 0; i < attributes.Length; i++)
{
Attr attr = attributes[i];
if (attr != null && (desc == null || desc.AttributeAllowed(attr.Name)))
{
output.Append(" ");
output.Append(attributes[i].Name);
string val = attributes[i].Value;
if (val != null)
{
// hack for Word 2007 footnotes.
if (tagName == "a")
{
if (attributes[i].NameEquals("name"))
{
// Do a fast check before doing an expensive one
if (val.StartsWith("_ftn", StringComparison.OrdinalIgnoreCase) && Regex.IsMatch(val, @"^_ftn(ref)?(\d+)$", RegexOptions.IgnoreCase))
val += WordFootnoteAnchorSuffix;
}
else if (attributes[i].NameEquals("href"))
{
// Do a fast check before doing an expensive one
if (val.StartsWith("#_ftn", StringComparison.OrdinalIgnoreCase) && Regex.IsMatch(val, @"^#_ftn(ref)?(\d+)$", RegexOptions.IgnoreCase))
val += WordFootnoteAnchorSuffix;
}
}
output.Append("=\"" + HtmlUtils.EscapeEntities(val) + "\"");
}
}
}
output.Append(">");
}
/// <summary>
/// Returns the first non-null attribute value whose name
/// matches the given name (case insensitive).
/// </summary>
public string GetAttributeValue(string attrName)
{
Attr attr = GetAttribute(attrName);
return((attr == null) ? null : attr.Value);
}
internal BeginTag(string data, int offset, int len, string name, Attr[] attributes, bool complete, LazySubstring extraResidue) : base(data, offset, len, name)
{
this.complete = complete;
_attributes = attributes == null ? new Attr[0] : attributes;
this.extraResidue = extraResidue;
}
public BeginTag(string data, int offset, int len, string name, Attr[] attributes, bool complete, string extraResidue) : this(data, offset, len, name, attributes, complete, LazySubstring.MaybeCreate(extraResidue))
{
}
private bool IsIllegalAttribute(Attr attribute)
{
if (IsRegexMatch(IllegalAttribute, attribute.Name))
{
return true;
}
if (FlagIsSet(Flag.RemoveScriptAttributes))
{
switch (attribute.Name.ToUpperInvariant())
{
// These are all the attributes from the HTML DTD that have %URI values.
case "SRC":
case "HREF":
case "DATASRC":
case "BACKGROUND":
case "LONGDESC":
case "USEMAP":
case "CLASSID":
case "CODEBASE":
case "DATA":
case "CITE":
case "ACTION":
case "PROFILE":
return IsScript(attribute.Value);
}
}
return false;
}
private bool IsScriptAttribute(Attr attribute)
{
foreach (string jscriptAttribute in _jscriptAttributes)
if (attribute.NameEquals(jscriptAttribute))
return true;
return false;
}
