Tools/TestWebKitAPI/Tests/WebKitCocoa/WKPrinting.mm

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#import "config.h"

typedef void (^CallCompletionBlock)();

@interface PrintUIDelegate : NSObject <WKUIDelegate>

- (void)waitForPagination;

@end

@implementation PrintUIDelegate {
    bool _isDone;
}

- (void)callBlockAsync:(CallCompletionBlock)callCompletionBlock
{
    dispatch_async(dispatch_get_main_queue(), ^{
        callCompletionBlock();
    });
}

- (void)_webView:(WKWebView *)webView printFrame:(_WKFrameHandle *)frame pdfFirstPageSize:(CGSize)size completionHandler:(void (^)(void))completionHandler
{
    _isDone = false;
    CallCompletionBlock callCompletionBlock = ^{
        [webView _computePagesForPrinting:frame completionHandler:^{
            _isDone = true;
            completionHandler();
        }];
    };

    // Dispatch the completion handler asynchronously to ensure we don't block IPC in the web process in the unbounded sync IPC case.
    [self callBlockAsync:callCompletionBlock];
}

- (void)waitForPagination
{
    TestWebKitAPI::Util::run(&_isDone);
}

@end

TEST(Printing, PrintWithDelayedCompletion)
{
    auto configuration = adoptNS([WKWebViewConfiguration new]);
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);
    auto delegate = adoptNS([PrintUIDelegate new]);
    [webView setUIDelegate:delegate.get()];

    NSURLRequest *request = [NSURLRequest requestWithURL:[[NSBundle mainBundle] URLForResource:@"simple" withExtension:@"html" subdirectory:@"TestWebKitAPI.resources"]];
    [webView loadRequest:request];
    [webView _test_waitForDidFinishNavigation];

    [webView evaluateJavaScript:@"window.print()" completionHandler:nil];
    [delegate waitForPagination];
}