// Validates that the elements named in 'args' in WebKit can be converted
// from HTML back into ECMA XML.
//
// Returns null on success, otherwise a string with the error details
//
public string ValidateElements(IWebView web, params string [] args)
{
foreach (var arg in args)
{
try {
var str = web.Fetch(arg);
DocConverter.ToXml(str, canonical: true);
web.RunJS("postOk", arg);
} catch (UnsupportedElementException e) {
web.RunJS("postError", arg);
return("Parsing error: " + e.Message);
} catch (StackOverflowException e) {
return("Exception " + e.GetType().ToString());
}
}
return(null);
}
//
// Updates the target XElement with the edited text.
// The first pass uses the provided xpath expression to remove all the nodes that match
// this expression from the target (this cleans the nodes that we are about to replace)
// then the named htmlElement is used to lookup the contents on WebKit and the results
// are converted back to XML which is stashed in the target specified by xpath.
//
// Returns true on success
public bool UpdateNode(IWebView webView, XElement target, string xpath, string htmlElement, out string error)
{
error = null;
var node = target.XPathSelectElement(xpath);
node.RemoveNodes();
try {
var str = webView.Fetch(htmlElement);
foreach (var ret in DocConverter.ToXml(str, canonical: true))
{
node.Add(ret);
}
} catch (UnsupportedElementException e) {
error = e.Message;
return(false);
}
return(true);
}
static void Process(XDocument d, string path)
{
var elements = d.XPathSelectElements(path);
foreach (var element in elements)
{
var str = element.ToString();
//Console.WriteLine (str);
var html = DocConverter.ToHtml(element, currentFile, Path.GetDirectoryName(path));
var ret = DocConverter.ToXml(html);
var sb = new StringBuilder();
foreach (var c in element.Nodes())
{
sb.Append(c.ToString());
}
var expected = sb.ToString();
//estr = estr.Replace (" />", "/>");
sb.Clear();
foreach (var c in ret)
{
try {
if (c is XComment)
{
sb.Append((c as XComment).Value);
}
else
{
sb.Append(c.ToString());
}
} catch (ArgumentException e) {
// An XML comment cannot end with "-" looks like a bug
}
}
var result = sb.ToString();
if (expected != result)
{
var diff = new XmlDiff(XmlDiffOptions.IgnoreWhitespace);
var xexpected = new XmlTextReader(new StringReader("<group>" + expected + "</group>"));
var xresult = new XmlTextReader(new StringReader("<group>" + result + "</group>"));
var equal = diff.Compare(xexpected, xresult); //, new XmlTextWriter (Console.Out));
if (!equal && expected != result)
{
bool found = false;
for (int i = 0; i < expected.Length && i < result.Length; i++)
{
if (expected [i] != result [i])
{
Report(expected, result, i);
// We redo the steps above, purely as it is easier to debug what happened right after
// the error is reported.
html = DocConverter.ToHtml(element, currentFile, Path.GetDirectoryName(path));
ret = DocConverter.ToXml(html);
found = true;
break;
}
}
if (!found)
{
Report(expected, result, Math.Min(expected.Length, result.Length));
}
}
}
}
}
