public void testBlank()
{
TextNode one = new TextNode("", "");
TextNode two = new TextNode(" ", "");
TextNode three = new TextNode(" \n\n ", "");
TextNode four = new TextNode("Hello", "");
TextNode five = new TextNode(" \nHello ", "");
Assert.IsTrue(one.IsBlank);
Assert.IsTrue(two.IsBlank);
Assert.IsTrue(three.IsBlank);
Assert.IsFalse(four.IsBlank);
Assert.IsFalse(five.IsBlank);
}
public void Insert(Token.Character characterToken)
{
Node node = new TextNode(characterToken.Data.ToString(), _baseUri);
InsertNode(node);
}
public void Insert(Token.Character characterToken)
{
Node node;
// characters in script and style go in as datanodes, not text nodes
if (StringUtil.In(CurrentElement.TagName(), "script", "style"))
{
node = new DataNode(characterToken.Data.ToString(), _baseUri);
}
else
{
node = new TextNode(characterToken.Data.ToString(), _baseUri);
}
CurrentElement.AppendChild(node); // doesn't use insertNode, because we don't foster these; and will always have a stack.
}
/// <summary>
/// Split this text node into two nodes at the specified string offset. After splitting, this node will contain the
/// original text up to the offset, and will have a new text node sibling containing the text after the offset.
/// </summary>
/// <param name="offset">string offset point to split node at.</param>
/// <returns>the newly created text node containing the text after the offset.</returns>
public TextNode SplitText(int offset)
{
if (offset < 0)
{
throw new ArgumentOutOfRangeException("offset", "Split offset must be not be negative");
}
if (offset > text.Length)
{
throw new ArgumentOutOfRangeException("offset", "Split offset must not be greater than current text length");
}
string head = GetWholeText().Substring(0, offset);
string tail = GetWholeText().Substring(offset);
Text(head);
TextNode tailNode = new TextNode(tail, this.BaseUri);
if (ParentNode != null)
{
ParentNode.AddChildren(SiblingIndex + 1, tailNode);
}
return tailNode;
}
/// <summary>
/// Iterates the input and copies trusted nodes (tags, attributes, text) into the destination.
/// </summary>
/// <param name="source">source of HTML</param>
/// <param name="dest">destination element to copy into</param>
/// <returns>number of discarded elements (that were considered unsafe)</returns>
private int CopySafeNodes(Element source, Element dest)
{
IList<Node> sourceChildren = source.ChildNodes;
int numDiscarded = 0;
foreach (Node sourceChild in sourceChildren)
{
if (sourceChild is Element)
{
Element sourceEl = (Element)sourceChild;
if (_whitelist.IsSafeTag(sourceEl.TagName()))
{ // safe, clone and copy safe attrs
ElementMeta meta = CreateSafeElement(sourceEl);
Element destChild = meta.Element;
dest.AppendChild(destChild);
numDiscarded += meta.NumAttributesDiscarded;
numDiscarded += CopySafeNodes(sourceEl, destChild); // recurs
}
else
{ // not a safe tag, but it may have children (els or text) that are, so recurse
numDiscarded++;
numDiscarded += CopySafeNodes(sourceEl, dest);
}
}
else if (sourceChild is TextNode)
{
TextNode sourceText = (TextNode)sourceChild;
TextNode destText = new TextNode(sourceText.GetWholeText(), sourceChild.BaseUri);
dest.AppendChild(destText);
} // else, we don't care about comments, xml proc instructions, etc
}
return numDiscarded;
}
