Commits on Sep 27, 2023

1. Use MSWord compatible RTF sequence for background text color (#16035) …

   The `GenRTF(...)` was using `\highlight` control word for sending
   background text color in the RTF format during a copy command. This
   doesn't work correctly, since many applications (E.g. MSWord) don't
   support full RGB with `\highlight`, and instead uses an approximation of
   what is received. For example, `rgb(197, 15, 31)` becomes `rgb(255, 0,
   255)`. Also, the standard way of using background colors is `\cbN`
   control word, which isn't supported as per the [RTF Spec 1.9.1]
   in Word.
   
   But it briefly mentioned a workaround at Pg. 23, which seems to work on
   all the RTF editors I tested.
   
   The PR makes the changes to use `\chshdng0\chcbpatN` for the background
   coloring.
   
   Also did some refactoring to make the implementation concise.
   
   ## Validation Steps Performed
   
   Verified that the background is correctly copied on below editors:
   - MSWord
   - WordPad
   - LibreOffice
   - Outlook
   
   [RTF Spec 1.9.1]: https://msopenspecs.azureedge.net/files/Archive_References/[MSFT-RTF].pdf

   

   tusharsnx authored Sep 27, 2023
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