<AWT Dev> [8] Request for review: 7075105: WIN: Provide a way to format HTML on drop

[Denis S. Fokin]

Please take a look at the next fix.

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7075105
Webrev can be found at: http://cr.openjdk.java.net/~denis/7075105/webrev.03/

I have executed a number of data transfer and drag and drop tests. No 
new failures have been found.

The fix intended to introduce three data flavors to represent 
transferred via clipboard and drag and drop HTML data.

The flavors are presented as fields in the DataFlavor class. The flavors 
are distinguishable by their mime-type parameters. So I have updated 
DataFlavor.equals(DataFlavor) implementation.

We lazily build mapping between the native data transfer formats and 
java flavors in the SystemFlavorMap class. Before we stored values in 
flavorToNative and nativeToFlavor
  maps in a type independent way as objects and handled special cases 
for text flavors latter in the SystemFlavorMap.getFlavorsForNative 
method. This way we stored both strings and flavors in the same 
container. I have slightly refactored our code to generify it and 
introduce froeach loops. I also replaced (Set + LinkedList) approach 
with LinkedHashSet one which should work the same way.

Conversion from java Transferable to the native data is enabled in 
WDataTransferer.translateTransferable().

To be able to use a foreach approach instaed of (for + iterator) in 
convertMimeTypeToDataFlavors method I have changed 
DataTransferer.standardEncodings() return type.

To be consistent with jdk7 model I have put some AutoCloseable instances 
in try clauses.

I have also created a pair of tests. One is manual and another is 
automatic one.

Thank you,
    Denis.