RFR: 8306083: Text.hitTest is incorrect when Text node is present in TextFlow

[Andy Goryachev]

On Wed, 21 Jun 2023 06:34:00 GMT, Karthik P K <kpk at openjdk.org> wrote:

> The text run selected in `PrismTextLayout::getHitInfo()` method for character index calculation was not correct when Text node was embedded in TextFlow. Hence wrong character index value was calculated for the same.
> 
> Since only x, y coordinates were available in the above mentioned method, sending the text as a parameter to this method is necessary so as to know if the text run selected for character index calculation is correct. Along with this change modified the `PrismTextLayout::getHitInfo()` method to calculate the correct character index.
> 
> Added tests to validate the changes.

Looks like Text.hitTest() does not return the right information (charIndex=0, leading) for text on either the second line, or a wrapped line.  (mouse over over 2nd/3rd lines):

![Screenshot 2023-06-21 at 15 56 30](https://github.com/openjdk/jfx/assets/107069028/19ed50e0-453d-4aea-8683-ef1e1ff95e64)

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PR Comment: https://git.openjdk.org/jfx/pull/1157#issuecomment-1601798335