private void RenderPortletPreview(HtmlTextWriter writer, Control container)
{
var controlCollection = container == null ? this.Controls : container.Controls;
// custom view logic
var text = _inputTextBox.Text;
string currentText = text;
var markup = PortletMarkup.GetFirstMarkup(currentText);
while (markup != null)
{
var textBefore = currentText.Substring(0, markup.StartIndex);
// render contents
controlCollection.Add(new Literal {
Text = textBefore
});
markup.AddToControls(controlCollection);
currentText = currentText.Substring(markup.EndIndex, currentText.Length - markup.EndIndex);
markup = PortletMarkup.GetFirstMarkup(currentText);
}
controlCollection.Add(new Literal {
Text = currentText
});
base.RenderContents(writer);
}
public static PortletMarkup GetFirstMarkup(string text)
{
var snPortletMarkup = new PortletMarkup();
try
{
var startIndex = text.IndexOf(MarkupStartFullTag);
if (startIndex == -1)
{
return(null);
}
// find closing 'table' tag, but the enclosed fraction should be well-formed with respect to the 'table' tags
// (should contain equal number of opening and closing 'table' tags)
snPortletMarkup.StartIndex = startIndex;
var endIndex = text.IndexOf(MarkupEndTag, startIndex);
var innterText = text.Substring(startIndex, endIndex - startIndex + MarkupEndTag.Length);
while (!IsValidMarkupSelection(innterText))
{
endIndex = text.IndexOf(MarkupEndTag, endIndex + 1);
innterText = text.Substring(startIndex, endIndex - startIndex + MarkupEndTag.Length);
}
// found valid innertext
snPortletMarkup.EndIndex = endIndex + MarkupEndTag.Length;
snPortletMarkup.InnerText = innterText;
// extract portlet information (resides in the section enclosed by the first 2 quatation marks)
var sections = innterText.Split(new char[] { '"' });
var portletInfo = sections[1];
var infos = portletInfo.Split(new char[] { ';' });
snPortletMarkup.CustomRootPath = infos[0];
snPortletMarkup.Renderer = infos[1];
return(snPortletMarkup);
}
catch
{
// could not extract portlet info from text fragment
return(null);
}
}