/// <summary>
/// Creates a PNG from the contents of a Xamarin.Forms.WebView
/// </summary>
/// <param name="webView"></param>
/// <param name="fileName"></param>
/// <returns></returns>
public static async Task <ToFileResult> ToPngAsync(this Xamarin.Forms.WebView webView, string fileName)
{
_platformToPngService = _platformToPngService ?? DependencyService.Get <IToPngService>();
if (_platformToPngService == null)
{
throw new NotSupportedException("Cannot get HtmlService: must not be supported on this platform.");
}
ToFileResult result = null;
using (var indicator = ActivityIndicatorPopup.Create())
{
result = await _platformToPngService.ToPngAsync(webView, fileName);
}
await Task.Delay(50);
return(result);
}
/// <summary>
/// Creates a PNG from the contents of a Xamarin.Forms.WebView
/// </summary>
/// <param name="webView">Xamarin.Forms.WebView</param>
/// <param name="fileName">Name (not path), excluding suffix, of PNG file</param>
/// <param name="width">Width of resulting PNG (in pixels).</param>
/// <returns></returns>
public static async Task <ToFileResult> ToPngAsync(this Xamarin.Forms.WebView webView, string fileName, int width = -1)
{
_platformToPngService = _platformToPngService ?? DependencyService.Get <IToPngService>();
if (_platformToPngService == null)
{
throw new NotSupportedException("Cannot get HtmlService: must not be supported on this platform.");
}
ToFileResult result = null;
using (var indicator = ActivityIndicatorPopup.Create())
{
if (width <= 0)
{
width = (int)Math.Ceiling((PageSize.Default.Width - (12 * 25.4)) * 4);
}
result = await _platformToPngService.ToPngAsync(webView, fileName, width);
}
await Task.Delay(50);
return(result);
}