/// <summary>
/// Detect the background color of a post body from a URI where
/// the post body element contains BlogEditingTemplate.POST_BODY_MARKER.
/// This must be done in a browser (as opposed to a simple DOM) because
/// the page elements don't layout relative to each other unless they
/// are being displayed in a browser.
/// </summary>
public static Color?DetectColor(string uri, Color?defaultColor)
{
return(BrowserOperationInvoker.InvokeAfterDocumentComplete(uri, "BackgroundColorDetector", 700, 700, defaultColor,
delegate(ExplorerBrowserControl browser)
{
IHTMLDocument2 document = browser.Document as IHTMLDocument2;
IHTMLElement[] elements = HTMLDocumentHelper.FindElementsContainingText(document, BlogEditingTemplate.POST_BODY_MARKER);
if (elements.Length == 1)
{
IHTMLElement postBody = elements[0];
if (postBody.offsetHeight < 300)
{
postBody.style.height = 300;
}
return HTMLColorHelper.GetBackgroundColor(postBody, true, null, Color.White);
}
return defaultColor;
}));
}
private BlogPostRegions ParseBlogPostIntoTemplate(Stream stream, string postSourceUrl, IProgressHost progress)
{
progress.UpdateProgress(Res.Get(StringId.ProgressCreatingEditingTemplate));
//parse the document to create the blog template
IHTMLDocument2 doc2 = HTMLDocumentHelper.GetHTMLDocumentFromStream(stream, postSourceUrl);
IHTMLDocument3 doc = (IHTMLDocument3)doc2;
IHTMLElement[] titleElements = HTMLDocumentHelper.FindElementsContainingText(doc2, TEMPORARY_POST_TITLE_GUID);
IHTMLElement bodyElement = HTMLDocumentHelper.FindElementContainingText(doc2, TEMPORARY_POST_BODY_GUID);
if (bodyElement != null && bodyElement.tagName == "P")
{
//the body element is the <p> we planted, so replace it with a DIV since that will be the safest
//element to have a as parent to all post content.
IHTMLElement div = doc2.createElement("div");
(bodyElement.parentElement as IHTMLDOMNode).replaceChild(div as IHTMLDOMNode, bodyElement as IHTMLDOMNode);
bodyElement = div;
}
//locate the title element. Note that is there are more than 1 copies of the title text detected, we use the one
//that is anchored closest to the left or the body element.
if (titleElements.Length > 0)
{
BlogPostRegions regions = new BlogPostRegions();
regions.Document = (IHTMLDocument)doc;
regions.TitleRegions = titleElements;
regions.BodyRegion = bodyElement;
progress.UpdateProgress(100, 100);
return(regions);
}
else
{
throw new Exception("unable to access test post.");
}
}