Hi, Eirik.
Thanks for report! Please file a new bug at
http://bugreport.sun.com/bugreport , don't forget to add a steps to
reproduce, then send me a bugid.
On 18.09.15 21:18, Eirik Bakke wrote:
Hi, macosx-port-dev.
There seems to be a bug in the MacOS implementation underlying
SystemFlavorMap.addFlavorForUnencodedNative. Where would the best place to
report this be? Is this the relevant mailing list?
The bug report follows:
My Java application allows users to paste selections from Microsoft Excel. The
data is retrieved using Excel's binary BIFF8 format rather than in plain text
format in order to reliably detect date formatting, preserve numerical
precision, and such. On Windows, getting to the relevant clipboard InputStream
can be achieved by calling SystemFlavorMap.addUnencodedNativeForFlavor to map a
new DataFlavor to a native data type identifier. On MacOS, however, there seems
to be a bug that renders SystemFlavorMap.addUnencodedNativeForFlavor
ineffective.
Looking at the JDK source code, the bug seems to be that
sun.lwawt.macosx.CDataTransferer.registerFormatWithPasteboard is never called
when SystemFlavorMap.addUnencodedNativeForFlavor/ addFlavorForUnencodedNative
is used to register a new native clipboard data format. This leads
Java_sun_lwawt_macosx_CClipboard_getClipboardFormats in
macosx/native/sun/awt/CClipboard.m to never return formats of the new type,
because indexForFormat (in CDataTransferer.m) will always return -1.
The observation above lead me to a workaround for the bug, which is to call
sun.awt.datatransfer.DataTransferer.getInstance().getFormatsForFlavor(myNewFlavor,
(SystemFlavorMap) SystemFlavorMap.getDefaultFlavorMap()) once after first
mapping the flavor using addUnencodedNativeForFlavor and
addFlavorForUnencodedNative. This works because the call to getFormatsForFlavor
forces DataTransferer.getFormatForNativeAsLong to be called with the new native
data type identifier, which in turn causes registerFormatWithPasteboard to be
called in CDataTransferer.m. I'm worried that the workaround will cease to work
in the future, however, since it relies on an obscure side-effect of a method
in a private API from the sun.awt package.
I've assembled a minimal example here:
https://gist.github.com/eirikbakke/e8022f9f8d26c28eecd7
-- Eirik
--
Best regards, Sergey.
