/// <summary>
/// This method takes the actual capture of the document (frame)
/// </summary>
/// <param name="documentContainer">DocumentContainer</param>
/// <param name="contentWindowDetails">Needed for referencing the location of the frame</param>
/// <param name="graphicsTarget">Graphics</param>
/// <returns>Bitmap with the capture</returns>
private static void DrawDocument(DocumentContainer documentContainer, IInteropWindow contentWindowDetails, Graphics graphicsTarget)
{
documentContainer.SetAttribute("scroll", 1);
//Get Browser Window Width & Height
var pageWidth = documentContainer.ScrollWidth;
var pageHeight = documentContainer.ScrollHeight;
if (pageWidth * pageHeight == 0)
{
Log.Warn().WriteLine("Empty page for DocumentContainer {0}: {1}", documentContainer.Name, documentContainer.Url);
return;
}
//Get Screen Width & Height (this is better as the WindowDetails.ClientRectangle as the real visible parts are there!
var viewportWidth = documentContainer.ClientWidth;
var viewportHeight = documentContainer.ClientHeight;
if (viewportWidth * viewportHeight == 0)
{
Log.Warn().WriteLine("Empty viewport for DocumentContainer {0}: {1}", documentContainer.Name, documentContainer.Url);
return;
}
// Store the current location so we can set the browser back and use it for the mouse cursor
var startLeft = documentContainer.ScrollLeft;
var startTop = documentContainer.ScrollTop;
Log.Debug().WriteLine("Capturing {4} with total size {0},{1} displayed with size {2},{3}", pageWidth, pageHeight, viewportWidth, viewportHeight, documentContainer.Name);
// Variable used for looping horizontally
var horizontalPage = 0;
// The location of the browser, used as the destination into the bitmap target
var targetOffset = new NativePoint();
// Loop of the pages and make a copy of the visible viewport
while (horizontalPage * viewportWidth < pageWidth)
{
// Scroll to location
documentContainer.ScrollLeft = viewportWidth * horizontalPage;
targetOffset = targetOffset.ChangeX(documentContainer.ScrollLeft);
// Variable used for looping vertically
var verticalPage = 0;
while (verticalPage * viewportHeight < pageHeight)
{
// Scroll to location
documentContainer.ScrollTop = viewportHeight * verticalPage;
//Shoot visible window
targetOffset = targetOffset.ChangeY(documentContainer.ScrollTop);
// Draw the captured fragment to the target, but "crop" the scrollbars etc while capturing
var viewPortSize = new Size(viewportWidth, viewportHeight);
var clientRectangle = new NativeRect(documentContainer.SourceLocation, viewPortSize);
var fragment = contentWindowDetails.PrintWindow();
if (fragment != null)
{
Log.Debug().WriteLine("Captured fragment size: {0}x{1}", fragment.Width, fragment.Height);
try
{
// cut all junk, due to IE "border" we need to remove some parts
var viewportRect = documentContainer.ViewportRectangle;
if (!viewportRect.IsEmpty)
{
Log.Debug().WriteLine("Cropping to viewport: {0}", viewportRect);
BitmapHelper.Crop(ref fragment, ref viewportRect);
}
Log.Debug().WriteLine("Cropping to clientRectangle: {0}", clientRectangle);
// Crop to clientRectangle
if (BitmapHelper.Crop(ref fragment, ref clientRectangle))
{
var targetLocation = new NativePoint(documentContainer.DestinationLocation.X, documentContainer.DestinationLocation.Y);
Log.Debug().WriteLine("Fragment targetLocation is {0}", targetLocation);
targetLocation = targetLocation.Offset(targetOffset);
Log.Debug().WriteLine("After offsetting the fragment targetLocation is {0}", targetLocation);
Log.Debug().WriteLine("Drawing fragment of size {0} to {1}", fragment.Size, targetLocation);
graphicsTarget.DrawImage(fragment, targetLocation);
graphicsTarget.Flush();
}
else
{
// somehow we are capturing nothing!?
Log.Warn().WriteLine("Crop of {0} failed?", documentContainer.Name);
break;
}
}
finally
{
fragment.Dispose();
}
}
else
{
Log.Warn().WriteLine("Capture of {0} failed!", documentContainer.Name);
}
verticalPage++;
}
horizontalPage++;
}
// Return to where we were
documentContainer.ScrollLeft = startLeft;
documentContainer.ScrollTop = startTop;
}
