public override async Task <bool> PrintWebViewAsync(
Page parentPage,
WebView webView,
IWebViewAdditionalFunctions webViewAdditionFunctions,
PrintJobConfiguration printJobConfiguration)
{
bool result = false;
try
{
if (PrintWebViewAsyncSupported &&
(webViewAdditionFunctions?.NativeControl is Android.Webkit.WebView nativeWebView))
{
PrintServiceAndroidHelper.PrintFromWebView(nativeWebView, printJobConfiguration);
result = true;
}
}
catch (Java.Lang.Exception jlex)
{
await PrintStatusReporting.ReportExceptionSilentlyAsync(jlex);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (System.Exception ex)
{
await PrintStatusReporting.ReportExceptionAsync(ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
return(result);
}
/// <summary>
/// Print the contents of a WebView
/// </summary>
/// <param name="parentPage">The page that the WebView is shown on.</param>
/// <param name="webView">The Xamarin.Forms WebView.</param>
/// <param name="webViewAdditionFunctions">Additional functions</param>
/// <param name="printJobConfiguration">Configuration information for the print job.</param>
/// <returns>true if attempting print, false otherwise.</returns>
public override async Task <bool> PrintWebViewAsync(
Page parentPage,
WebView webView,
IWebViewAdditionalFunctions webViewAdditionFunctions,
PrintJobConfiguration printJobConfiguration)
{
bool result = false;
try
{
// TODO - get rid of use of UIWebView as deprecated by Apple
// See https://forums.xamarin.com/discussion/168620/itms-90338-non-public-api-usage-apple-rejected-my-app-xamarin#latest
if (PrintWebViewAsyncSupported &&
(webViewAdditionFunctions?.NativeControl is UIWebView nativeWebView))
{
using (nativeWebView)
{
result = await PrintUIViewAsync(nativeWebView, printJobConfiguration);
}
}
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
await PrintStatusReporting.ReportExceptionAsync(ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
return(result);
}
public override async Task <bool> PrintWebViewAsync(
Page page,
WebView webView,
IWebViewAdditionalFunctions webViewAdditionFunctions,
PrintJobConfiguration config)
{
bool result = false;
try
{
if (PrintWebViewAsyncSupported)
{
if (!(webViewAdditionFunctions is null))
{
await webViewAdditionFunctions.WaitForViewToBeInNativeLayout(page, 10, 100);
WebViewPrintJob printJob = new WebViewPrintJob(config, webViewAdditionFunctions);
//WebViewPrintJob printJob = new WebViewPrintJob(config, html);
await printJob.PrintAsync();
result = true;
}
}
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
await PrintStatusReporting.ReportExceptionAsync(ex);
result = false;
}
#pragma warning restore CA1031 // Do not catch general exception types
// TODO - does this want to be here??? printJob?.UnwireAllEvents();
return(result);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="printJobConfiguration">Configuration information for the print job</param>
/// <param name="webViewAdditionalFunctions">Interface that provides access to functionality required by this class. Typically, this interface will be implemented by a subclass of Xamarin.Forms.WebView</param>
public WebViewPrintJob(
PrintJobConfiguration printJobConfiguration,
IWebViewAdditionalFunctions webViewAdditionalFunctions)
: base(printJobConfiguration)
{
if (webViewAdditionalFunctions is null)
{
throw new PrintJobException(
"EXCEPTION:PRN003 Invalid interface to native WebView",
new ArgumentNullException(nameof(webViewAdditionalFunctions)));
}
else if (webViewAdditionalFunctions.NativeControl is null)
{
throw new PrintJobException(
"EXCEPTION:PRN004 Invalid (null) native WebView");
}
else if (!(webViewAdditionalFunctions.NativeControl is Windows.UI.Xaml.Controls.WebView))
{
throw new PrintJobException(
"EXCEPTION:PRN006 Invalid native WebView");
}
_nativeWebView = (Windows.UI.Xaml.Controls.WebView)webViewAdditionalFunctions.NativeControl;
}
public abstract Task <bool> PrintWebViewAsync(Page parentPage, WebView webView, IWebViewAdditionalFunctions webViewAdditionFunctions, PrintJobConfiguration config);
