<Swing Dev> RFR : JDK-8239334:Tab Size does not work correctly in JTextArea with setLineWrap on

[Prasanta Sadhukhan]

Hi All,

Bug: https://bugs.openjdk.java.net/browse/JDK-8239334
webrev: http://cr.openjdk.java.net/~psadhukhan/8239334/webrev.0/

Please review a fix for an issue where it is seen string with "tab" in 
them are not aligned properly with linewrap on.

This is in continuation to a fix done in JDK-8187957 
<https://bugs.openjdk.java.net/browse/JDK-8187957> where the fix was 
done in PlainView.
This is because while calculating tab stop postion, it is calculating 
number of tabs in float value (an aftereffect of JDK-8156217 
<https://bugs.openjdk.java.net/browse/JDK-8156217>)
so next tab stop location is coming out wrong.
Fix is to use "number of tabs" as an integer value in order to calculate 
the tab position correctly.

The same fix should be done for WrappedPlainView for line wrap path.

Regards
Prasanta

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