<Swing Dev> RFR: 8256019: JLabel HTML text does not support translucent text colors [v3]

[Prasanta Sadhukhan]

> Issue is a JLabel with a translucent foreground color properly renders plain text, but with HTML text, the alpha component is discarded and the text is rendered using an opaque color.
> As per https://www.w3schools.com/cssref/func_rgba.asp, CSS supports rgba() to support alpha and render translucent text color
> but support for rgba() is not present in JDK html text rendering.
> 
> Added support for rgba() to render translucent text color.

Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:

  Revert unneeded additional code

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1158/files
  - new: https://git.openjdk.java.net/jdk/pull/1158/files/bf0c84ae..f98cae53

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1158&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1158&range=01-02

  Stats: 64 lines in 3 files changed: 10 ins; 42 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1158.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1158/head:pull/1158

PR: https://git.openjdk.java.net/jdk/pull/1158