private void showWebitem(TreeNode parentNode, WebItem webItem)
{
TreeNode childNode = new TreeNode(webItem.Text);
if (parentNode == null)
{
tvWebPage.Nodes.Clear();
tvWebPage.Nodes.Add(childNode);
}
else
parentNode.Nodes.Add(childNode);
//Attributes
foreach (WebItemAttribute wia in webItem.Attributes)
{
TreeNode ndAtt = new TreeNode("(a)" + wia.Name + " = " + wia.Content);
childNode.Nodes.Add(ndAtt);
}
//Children
foreach (WebItem childWI in webItem.Children)
{
showWebitem(childNode, childWI);
}
}
public List<WebItem> Tokenise(string html)
{
List<WebItem> page = new List<WebItem>();
WebItem currentItem = new WebItem(false);
bool inScript = false;
//Loop through each character
foreach (char c in html)
{
switch (c)
{
case '<':
//Is there any content?
if (!String.IsNullOrEmpty(currentItem.Text) && !currentItem.IsTag && !inScript)
_stack.Peek().Children.Add(currentItem);
//Start New Item
currentItem = new WebItem(true);
break;
case '>':
//Is it a comment?
if (currentItem.IsComment) continue;
//Ignore Script
if (currentItem.Text.ToLower() == "script") inScript = true;
if (currentItem.Text.ToLower() == "/script") inScript = false;
if (inScript || currentItem.Text.ToLower() == "/script") continue;
//Is this a terminator tag?
if (currentItem.IsTerminatorTag)
{
WebItem topOfStack = _stack.Pop();
if ("/" + topOfStack.Text.ToLower() != currentItem.Text.ToLower())
{
//Possible bug, but more likely a malformed page
//TDHelper.Trc(TDHelper.TrcLvl.Warning, string.Format("Terminator tag {0} does not match top of stack {1}. Ignoring terminator.", currentItem.Text, topOfStack.Text));
_stack.Push(topOfStack);
continue;
}
if (_stack.Count > 0)
_stack.Peek().Children.Add(topOfStack);
else
page.Add(topOfStack);
currentItem = new WebItem(false);
continue;
}
//Did this item self-terminate?
currentItem.CheckText();
if (currentItem.LastChar == '/' || currentItem.IsAutoTerminatorTag)
_stack.Peek().Children.Add(currentItem);
else
_stack.Push(currentItem);
//Close Item
currentItem = new WebItem(false);
break;
case '\r':
case '\n':
//Ignore These characters
break;
default:
currentItem.AddChar(c);
break;
}
}
//Dump out from the stack
//The stack should be empty, but this could be due to bugs or malformed code
while (_stack.Count > 0)
{
WebItem topOfStack = _stack.Pop();
if (_stack.Count > 0)
_stack.Peek().Children.Add(topOfStack);
else
page.Add(topOfStack);
}
return page;
}
public static WebItem ExtractSection(WebItem parent, string tag, string attributeName, string attributeContent)
{
tag = tag.ToLower().Trim();
attributeName = attributeName.ToLower().Trim();
attributeContent = attributeContent.ToLower().Trim();
//Is this a match
if (parent.Text.ToLower() == tag)
{
if (!String.IsNullOrEmpty(attributeName))
{
foreach (WebItemAttribute att in parent.Attributes)
{
if (att.Name.ToLower() == attributeName)
{
if (!String.IsNullOrEmpty(attributeContent))
{
if (att.Content.ToLower() == attributeContent)
return parent;
//Try it with quotes
if (att.Content.Substring(0, 1) == "\"" && attributeContent.Substring(0, 1) != "\"")
{
if (att.Content.ToLower() == "\"" + attributeContent + "\"")
return parent;
}
}
else
return parent;
}
}
}
else
return parent;
}
//Search the children
return parent.Children.Select(child => ExtractSection(child, tag, attributeName, attributeContent)).FirstOrDefault(result => result != null);
}
private static string GetContent(WebItem wi)
{
ConsoleMsg("GetContent", MsgType.FunctionCall);
var rv = "";
foreach (var child in wi.Children)
{
if (child.Children.Count > 0)
return wi.Children.Count != 1 ? "ERROR" : GetContent(child);
}
foreach (var child in wi.Children)
{
if (child.IsTag) continue;
if (rv.Length > 0) rv += " ";
rv += child.Text;
}
return rv;
}
