//NB: make sure the <base> is set correctly, 'cause you don't know where this method will
//save the file before navigating to it.
public void Navigate(XmlDocument dom, XmlDocument editDom = null)
{
if (InvokeRequired)
{
Invoke(new Action <XmlDocument, XmlDocument>(Navigate), dom, editDom);
return;
}
_rootDom = dom; //.CloneNode(true); //clone because we want to modify it a bit
_pageEditDom = editDom ?? dom;
/* This doesn't work for the 1st book shown, or when you change book sizes.
* But it's still worth doing, becuase without it, we have this annoying re-zoom every time we look at different page.
*/
XmlElement body = (XmlElement)_rootDom.GetElementsByTagName("body")[0];
if (ScaleToFullWidthOfPage)
{
var scale = GetScaleToShowWholeWidthOfPage();
if (scale > 0f)
{
body.SetAttribute("style", GetZoomCSS(scale));
}
}
XmlHtmlConverter.MakeXmlishTagsSafeForInterpretationAsHtml(dom);
SetNewTempFile(TempFileUtils.CreateHtm5FromXml(dom));
_url = _tempHtmlFile.Path.ToLocalhost();
UpdateDisplay();
}
/// <summary>
/// Returns true if it make some attempt at an image, false if navigation is currently suppressed.
/// </summary>
/// <param name="order"></param>
/// <param name="browser"></param>
/// <param name="thumbnail"></param>
/// <returns></returns>
private bool CreateThumbNail(ThumbnailOrder order, GeckoWebBrowser browser, out Image thumbnail)
{
// runs on threadpool thread
thumbnail = null;
using (var temp = TempFileUtils.CreateHtm5FromXml(order.Document))
{
order.Done = false;
browser.Tag = order;
if (!OpenTempFileInBrowser(browser, temp.Path))
{
return(false);
}
var browserSize = SetWidthAndHeight(browser);
if (browserSize.Height == 0) //happens when we run into the as-yet-unreproduced-or-fixed bl-254
{
return(false); // will try again later
}
try
{
Logger.WriteMinorEvent("HtmlThumNailer ({2}): browser.GetBitmap({0},{1})", browserSize.Width,
(uint)browserSize.Height,
Thread.CurrentThread.ManagedThreadId);
//BUG (April 2013) found that the initial call to GetBitMap always had a zero width, leading to an exception which
//the user doesn't see and then all is well. So at the moment, we avoid the exception, and just leave with
//the placeholder thumbnail.
if (browserSize.Width == 0 || browserSize.Height == 0)
{
var paperSizeName = GetPaperSizeName(order.Document);
throw new ApplicationException("Problem getting thumbnail browser for document with Paper Size: " +
paperSizeName);
}
using (Image fullsizeImage = CreateImage(browser))
{
if (_disposed)
{
return(false);
}
thumbnail = MakeThumbNail(fullsizeImage, order.Options);
return(true);
}
}
catch (Exception error)
{
Logger.WriteEvent("HtmlThumbNailer ({0}) got {1}", Thread.CurrentThread.ManagedThreadId, error.Message);
Logger.WriteEvent("Disposing of all browsers in hopes of getting a fresh start on life");
foreach (var browserCacheForDifferentPaperSize in _browserCacheForDifferentPaperSizes)
{
try
{
Logger.WriteEvent("Disposing of browser {0}", browserCacheForDifferentPaperSize.Key);
browserCacheForDifferentPaperSize.Value.Dispose();
}
catch (Exception e2)
{
Logger.WriteEvent(
"While trying to dispose of thumbnailer browsers as a result of an exception, go another: " + e2.Message);
}
}
_browserCacheForDifferentPaperSizes.Clear();
#if DEBUG
_syncControl.Invoke((Action)(() => Debug.Fail(error.Message)));
#endif
}
}
return(false);
}