/// <summary>
/// Get a collection of lines from a HtmlNode
/// </summary>
public IList <HtmlLine> GetLines(HtmlNode node, ConvertOptions options)
{
HtmlLineCollection lineCollection = new HtmlLineCollection();
GetLines(node, lineCollection);
IList <HtmlLine> lines = lineCollection.Lines;
// remove consequitive empty lines
HtmlLine previous = null;
for (int i = lines.Count - 1; i >= 0; i--)
{
HtmlLine line = lines[i];
line.NormalisedValue = NormaliseText(line.Text);
if (previous != null)
{
if (line.Text == null && previous.Text == null)
{
lines.RemoveAt(i + 1);
}
}
previous = line;
}
return(lines);
}
private void RecurseToLines(HtmlNode node, HtmlLineCollection lines)
{
if (node.HasChildNodes)
{
foreach (HtmlNode subnode in node.ChildNodes)
{
GetLines(subnode, lines);
}
}
}
private void GetLines(HtmlNode node, HtmlLineCollection lines)
{
string filterout = node.GetAttributeValue("filtered-out", null);
if (!string.IsNullOrEmpty(filterout))
{
// ignore filtered out nodes
}
else if (node.NodeType == HtmlNodeType.Comment)
{
// ignore comments completely
}
else if (node.NodeType == HtmlNodeType.Text)
{
// get text
string text = ((HtmlTextNode)node).Text;
// is it in fact a special closing node output as text?
if (HtmlNode.IsOverlappedClosingElement(text))
{
return;
}
text = SystemPlus.Net.HtmlTools.HtmlDecode(text);
// check the text is meaningful
if (!string.IsNullOrWhiteSpace(text))
{
lastWritten = text;
if (lines.CurrentLine == null)
{
lines.AddTextLine(node.Name, node.ParentNode.XPath);
}
lines.AddText(lastWritten);
}
}
else
{
if (node.Name == "style" || node.Name == "script" || node.Name == "noscript")
{
// ignore these
}
else if (node.Name == "img")
{
string src = node.GetAttributeDecoded("src", null);
string alt = node.GetAttributeDecoded("alt", null);
if (src != null)
{
lastWritten = "\r\n";
lines.AddImageLine(node.Name, node.XPath, src, alt);
}
}
else if (node.Name == "br" || node.Name == "hr")
{
lastWritten = "\r\n";
lines.AddTextLine(node.Name, node.XPath);
}
else if (node.Name == "div" || node.Name == "p" || node.Name == "ul" || node.Name == "ol" || node.Name == "li" || node.Name == "h1" || node.Name == "h2" || node.Name == "h3" || node.Name == "h4" || node.Name == "h5" || node.Name == "h6")
{
lastWritten = "\r\n";
lines.AddTextLine(node.Name, node.XPath);
RecurseToLines(node, lines);
if (node.Name == "ul" || node.Name == "ol" || node.Name == "li")
{
lastWritten = "\r\n";
lines.AddTextLine(node.Name, node.XPath);
}
}
else
{
if (lastWritten != null && !char.IsWhiteSpace(lastWritten.Last()))
{
lastWritten = " ";
if (lines.CurrentLine == null)
{
lines.AddTextLine(node.Name, node.XPath);
}
lines.AddText(lastWritten);
}
RecurseToLines(node, lines);
}
}
}
