[macOS] Create a test for scrollbar visibility when 3rd party mouse is used.

[Per Arne Vollan]

We should create a test for the fix in https://bugs.webkit.org/show_bug.cgi?id=188372.

[Radar WebKit Bug Importer]

<rdar://problem/43007729>

[Per Arne Vollan]

Created attachment 347852 [details]
Patch

[Per Arne Vollan]

Created attachment 347853 [details]
Patch

[Per Arne Vollan]

Created attachment 347857 [details]
Patch

[Per Arne Vollan]

Created attachment 347864 [details]
Patch

[Per Arne Vollan]

Created attachment 347865 [details]
Patch

[Per Arne Vollan]

Created attachment 347867 [details]
Patch

[Per Arne Vollan]

Created attachment 347874 [details]
Patch

[EWS Watchlist]

Comment on attachment 347874 [details]
Patch

Attachment 347874 [details] did not pass mac-ews (mac):
Output: https://webkit-queues.webkit.org/results/8951985

New failing tests:
fast/scrolling/scrollbar-style-external-mouse.html

[EWS Watchlist]

Created attachment 347890 [details]
Archive of layout-test-results from ews101 for mac-sierra

The attached test failures were seen while running run-webkit-tests on the mac-ews.
Bot: ews101  Port: mac-sierra  Platform: Mac OS X 10.12.6

[EWS Watchlist]

Comment on attachment 347874 [details]
Patch

Attachment 347874 [details] did not pass ios-sim-ews (ios-simulator-wk2):
Output: https://webkit-queues.webkit.org/results/8951617

New failing tests:
fast/scrolling/scrollbar-style-external-mouse.html

[EWS Watchlist]

Created attachment 347891 [details]
Archive of layout-test-results from ews124 for ios-simulator-wk2

The attached test failures were seen while running run-webkit-tests on the ios-sim-ews.
Bot: ews124  Port: ios-simulator-wk2  Platform: Mac OS X 10.13.4

[EWS Watchlist]

Comment on attachment 347874 [details]
Patch

Attachment 347874 [details] did not pass mac-debug-ews (mac):
Output: https://webkit-queues.webkit.org/results/8952055

New failing tests:
fast/scrolling/scrollbar-style-external-mouse.html

[EWS Watchlist]

Created attachment 347892 [details]
Archive of layout-test-results from ews116 for mac-sierra

The attached test failures were seen while running run-webkit-tests on the mac-debug-ews.
Bot: ews116  Port: mac-sierra  Platform: Mac OS X 10.12.6

[EWS Watchlist]

Comment on attachment 347874 [details]
Patch

Attachment 347874 [details] did not pass win-ews (win):
Output: https://webkit-queues.webkit.org/results/8955887

New failing tests:
fast/scrolling/scrollbar-style-external-mouse.html

[EWS Watchlist]

Created attachment 347917 [details]
Archive of layout-test-results from ews206 for win-future

The attached test failures were seen while running run-webkit-tests on the win-ews.
Bot: ews206  Port: win-future  Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit

[Per Arne Vollan]

Created attachment 347930 [details]
Patch

[Simon Fraser (smfr)]

What is happening

[Per Arne Vollan]

(In reply to Simon Fraser (smfr) from comment #18)
> What is happening

I believe the build and test failures should be fixed now :)

[Sam Weinig]

Rather than creating additional SPI, can we instead swizzle [NSScroller preferredScrollerStyle] and send a NSPreferredScrollerStyleDidChangeNotification?

[Per Arne Vollan]

(In reply to Sam Weinig from comment #20)
> Rather than creating additional SPI, can we instead swizzle [NSScroller
> preferredScrollerStyle] and send a
> NSPreferredScrollerStyleDidChangeNotification?

That is a good idea, I'll look into that. Thanks for reviewing!

[Per Arne Vollan]

Created attachment 348030 [details]
Patch

[Per Arne Vollan]

Created attachment 348152 [details]
Patch

[Per Arne Vollan]

Created attachment 348830 [details]
Patch

[Simon Fraser (smfr)]

Comment on attachment 348830 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=348830&action=review

> Tools/WebKitTestRunner/TestController.h:490
> +    bool m_useOverlayScrollbars { false };

Why doesn't this follow useMockScrollbars ?

[EWS Watchlist]

Comment on attachment 348830 [details]
Patch

Attachment 348830 [details] did not pass win-ews (win):
Output: https://webkit-queues.webkit.org/results/9092908

New failing tests:
fast/workers/worker-exception-during-navigation.html

[EWS Watchlist]

Created attachment 348863 [details]
Archive of layout-test-results from ews203 for win-future

The attached test failures were seen while running run-webkit-tests on the win-ews.
Bot: ews203  Port: win-future  Platform: CYGWIN_NT-6.1-2.9.0-0.318-5-3-x86_64-64bit

[Per Arne Vollan]

(In reply to Simon Fraser (smfr) from comment #25)
> Comment on attachment 348830 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=348830&action=review
> 
> > Tools/WebKitTestRunner/TestController.h:490
> > +    bool m_useOverlayScrollbars { false };
> 
> Why doesn't this follow useMockScrollbars ?

This member variable is actually not needed since we should always use the legacy scroller style when swizzling [NSScroller preferredScrollerStyle]. I will update the patch.

Thanks for reviewing!

[Per Arne Vollan]

Created attachment 348945 [details]
Patch

[Per Arne Vollan]

Created attachment 349479 [details]
Patch

[Alex Christensen]

Comment on attachment 349479 [details]
Patch

This has been requesting review for more than one year.  If this is still needed, please rebase and re-request review.