public void RaiseCallbackEvent(string arg)
{
Result = null;
try {
string cmd, par = string.Empty;
int i = arg.IndexOf(':');
if (i == -1) cmd = arg;
else {
cmd = arg.Substring(0, i);
par = arg.Substring(i + 1);
}
switch (cmd) {
case "load":
Html.DocumentNode html;
var preview = PreviewElement; // if Preview element exists load preview else HtmlElement.Children.
if (preview != null) html = preview.Children;
else html = Element.Children;
EditorConverter.Export(html);
Services.JavaScriptTextEditor.Converter.Export(html, out Result);
break;
case "save":
var oldText = Element.Children.Text; // save old text
preview = CreatePreviewElement();
Services.JavaScriptTextEditor.Converter.Import(preview.Children, par);
EditorConverter.Import(preview.Children);
// TODO preview.Children.AddIdentation(preview.ChildIdentation);
CheckParseErrors();
Element.Preview();
// page is now saved, now get the new html via a WebClient request to the saved page.
try {
var web = new CookieAwareWebClient(); // start a webrequest to the new preview page.
web.UseDefaultCredentials = true;
web.Encoding = Encoding.UTF8;
web.Headers[HttpRequestHeader.UserAgent] = Request.UserAgent;
//web.Headers[HttpRequestHeader.TransferEncoding] = "UTF8";
//web.Headers[HttpRequestHeader.ContentEncoding] = "UTF8";
foreach (var key in Request.Cookies.Keys.OfType<string>()) {
var cookie = Request.Cookies[key];
var wc = new Cookie(cookie.Name, cookie.Value, cookie.Path, Request.Url.Host);
wc.Expires = cookie.Expires;
web.Cookies.Add(wc);
}
Html.Element e = null;
var dochtml = web.DownloadString(Request.Url.AbsoluteUri); // get the new preview page's html.
if (dochtml != null) {
// parse the received html page for the Container control.
if (string.IsNullOrEmpty(Container.ClientID)) CreateChildControls(); // this is needed so we know the Container.ClientID, because otherwise Container get's not instantiated in CallbackEvent.
var doc = new Html.Document(dochtml);
e = doc.Find(Container.ClientID); // get our element out of the html.
}
if (e != null) {
Result = e.Children.Text; // return the element's html
} else {
Element.Children.Text = oldText;
Save();
throw new Exception("Invalid HTML.");
}
} catch (Exception ex) { // exception viewing the new preview page
Element.Children.Text = oldText; // reset text
Save();
Result = null;
throw ex;
}
break;
default: throw new NotSupportedException("EditableContent: Unknown callback command.");
}
} catch (Exception ex) {
Services.Log.Error("EditableContent callback exception:", ex);
throw ex;
}
}
