[OpenJDK 2D-Dev] RFR: 8203796: Define API to support specifying ownership of print dialogs.

Phil Race philip.race at oracle.com
Tue Jun 5 19:29:07 UTC 2018

On 06/05/2018 11:46 AM, Kevin Rushforth wrote:
> My testing of the fix on Windows (with the corresponding FX fix) looks 
> good. A couple comments / questions:
> DialogOwner.java:
> * The docs should probably say what the behavior is if the application 
> does not have the alwaysOnTop permission. I presume that the attribute 
> will be silently ignored without that permission? Have you tested this?

I expect a security exception will be thrown. Although it is unlikely 
that an application
will have print permission and not this permission.
Since the application does not control the size/appearance/content of 
the dialog
the reasons for the permission do not apply, so if it did not, it is not 
a concern if
it was to always appear on top, but also if the application does not 
have this permission
it is not important enough to assert it.
So a change to catch the exception should be sufficient and I will make 
that change.

> PrintJob2D.java:
> * The only change appears to be adding an unused import.

It is not unused. Previously DialogOwner was in the same package.
Now it is not, so an import is now needed.

> DialogOwnerTest.java:
> * Does the test need '@key headful' or is this not needed because it 
> is a manual test?

right, all our manual tests require interaction so are headful.
> * The new unit test fails to compile for me, but maybe I'm doing 
> something wrong (I just ran it with jtreg with no special arguments).


updated webrev : http://cr.openjdk.java.net/~prr/8203796.2/


> -- Kevin
> On 6/4/2018 12:39 PM, Phil Race wrote:
>> I have posted an updated webrev 
>> http://cr.openjdk.java.net/~prr/8203796.1
>> which removes the "native id" case from the public API. Now the plan is
>> that any code that needs to specify this will need to use native code 
>> to set it.
>> The CSR text is also updated, and so is the referenced FX webrev
>> http://cr.openjdk.java.net/~prr/8195808.1
>> -phil.
>> On 05/25/2018 11:04 AM, Phil Race wrote:
>>> This defines a new class "DialogOwner" implementing 
>>> PrintRequestAttribute
>>> which allows an application to specify that a Print or Page dialog 
>>> be  one of
>>> 1) owned by an application specified AWT window
>>> 2) owned by an application specified foreign (non-AWT) window
>>> 3) use AWT's alwaysOnTop functionality where supported.
>>> JDK bug: https://bugs.openjdk.java.net/browse/JDK-8203796
>>> CSR : https://bugs.openjdk.java.net/browse/JDK-8203834
>>> JDK webrev : http://cr.openjdk.java.net/~prr/8203796/
>>> Please review the webrev and the CSR.
>>> The webrev will show that this functionality was already mostly 
>>> available but only as internal API.
>>> To help applications be able to query what is supported, the various
>>> PrintService implementation classes needed to be updated, for 
>>> example "ID"
>>> is reported as unsupported unless specifying using the native dialog 
>>> on windows.
>>> That actually pointed out that back in JDK 7 when we added 
>>> DialogTypeSelection
>>> to be able to choose native or Swing there was no query support for 
>>> that to be
>>> added. It was not a problem though as if it was not supported it 
>>> really just meant
>>> that applications would have to live with what dialog was provided, 
>>> as before.
>>> But it made a test for this new API more difficult .. so I added 
>>> code needed for that.
>>> The test is manual. An automated test might be possible, but 
>>> probably very flaky.
>>> But the test only makes you run through the scenarios that we know 
>>> are supportable.
>>> The motivation for this new public API is to help OpenJFX since it 
>>> uses the Java 2D PrinterJob class
>>> to implement its own printing, so there is also an FX side to switch 
>>> to using this instead
>>> of the earlier internal API which it can not access when it is 
>>> outside the JDK :
>>> FX bug : https://bugs.openjdk.java.net/browse/JDK-8195808
>>> FX webrev: http://cr.openjdk.java.net/~prr/8195808/
>>> -phil.

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