private async void FullpageScreenshotByScrolling()
{
int scrollHeight = GetDocHeight();
if (scrollHeight == 0)
{
FireScreenshotCompleteEvent(false);
return;
}
Debug.WriteLine("Client rect height: " + ClientRectangle.Size.Height);
Debug.WriteLine("Control height: " + Height);
Debug.WriteLine("Display Rect height: " + DisplayRectangle.Height);
Debug.WriteLine("Client size height: " + ClientSize.Height);
Enabled = false;
int viewportHeight = ClientRectangle.Size.Height;
int viewportWidth = ClientRectangle.Size.Width;
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { document.documentElement.style.overflow = 'hidden'; })();");
int count = 0;
int pageLeft = scrollHeight;
bool atBottom = false;
Debug.WriteLine($"OUTSIDE --- PAGE LEFT: {pageLeft}. VIEWPORT HEIGHT: {viewportHeight}");
ImageDiskCache cache = new ImageDiskCache();
while (!atBottom)
{
if (pageLeft > viewportHeight)
{
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { window.scroll(0," + (count * viewportHeight) + "); })();");
count++;
await PutTaskDelay(); //we do need these delays. Some pages, like facebook, may need to load viewport content.
using (Bitmap image = GetCurrentViewScreenshot())
{
cache.AddImage(count, image);
}
if (!OsirtHelper.IsOnGoogle(URL))
{
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { var elements = document.querySelectorAll('*'); for (var i = 0; i < elements.length; i++) { var position = window.getComputedStyle(elements[i]).position; if (position === 'fixed') { elements[i].style.visibility = 'hidden'; } } })(); ");
}
}
else
{
//find out what's left of the page to scroll, then take screenshot
//if it's the last image, we're going to need to crop what we need, as it'll take
//a capture of the entire viewport.
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { window.scrollBy(0," + pageLeft + "); })();");
atBottom = true;
count++;
await PutTaskDelay();
Rectangle cropRect = new Rectangle(new Point(0, viewportHeight - pageLeft), new Size(viewportWidth, pageLeft));
using (Bitmap src = GetCurrentViewScreenshot())
using (Bitmap target = new Bitmap(cropRect.Width, cropRect.Height))
using (Graphics g = Graphics.FromImage(target))
{
g.DrawImage(src, new Rectangle(0, 0, target.Width, target.Height), cropRect, GraphicsUnit.Pixel);
cache.AddImage(count, target);
}
}
pageLeft = pageLeft - viewportHeight;
Debug.WriteLine($"IN WHILE --- PAGE LEFT: {pageLeft}. VIEWPORT HEIGHT: {viewportHeight}");
}//end while
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { document.documentElement.style.overflow = 'auto'; })();");
await GetBrowser().MainFrame.EvaluateScriptAsync("javascript:var s = function() { document.body.scrollTop = document.documentElement.scrollTop = 0;}; s();");
if (!OsirtHelper.IsOnGoogle(URL))
{
await GetBrowser().MainFrame.EvaluateScriptAsync("(function() { var elements = document.querySelectorAll('*'); for (var i = 0; i < elements.length; i++) { var position = window.getComputedStyle(elements[i]).position; if (position === 'fixed') { elements[i].style.visibility = 'visible'; } } })(); ");
}
Enabled = true;
WaitWindow.Show(GetScreenshot, Resources.strings.CombineScreenshots);
FireScreenshotCompleteEvent(true);
}