feat: add WhiteSpace setter and getter methods

[denis-anisimov]

fixes #4577

Description

Please list all relevant dependencies in this section and provide summary of the change, motivation and context.

Fixes # (issue)

Type of change

• Bugfix
• Feature

Checklist

• I have read the contribution guide: https://vaadin.com/docs/latest/guide/contributing/overview/
• I have added a description following the guideline.
• The issue is created in the corresponding repository and I have referenced it.
• I have added tests to ensure my change is effective and works as intended.
• New and existing tests are passing locally with my change.
• I have performed self-review and corrected misspellings.

Additional for Feature type of change

• Enhancement / new feature was discussed in a corresponding GitHub issue and Acceptance Criteria were created.

[knoobie]

Personally, I don't really see the need of this addition; it bloats the HasText interface and the getWhiteSpace does not really give the precise value (somebody would expect; calculated from the browser) instead it returns the value that was given by set or a default value that could even be wrong if styled with CSS.

[mshabarov]

the getWhiteSpace does not really give the precise value (somebody would expect; calculated from the browser) instead it returns the value that was given by set or a default value that could even be wrong if styled with CSS.

If it behaves like this, then maybe better to not add getWhiteSpace at all, or describe it's limitation in javadoc.

[mshabarov]

I'm not familiar with the white-space CSS properties that much, but the new API look good to me.

[mshabarov]

Added Leif as he was the author of this enhancement.

[Legioth]

The implementation seems to be in line with what I have expected. My only remark is that there's some new API in the enum that is implicitly public that doesn't have javadocs, but that's up to the team do decide what policy you have for such cases.

[vaadin-bot]

SonarQube analysis reported 1 issue

1. HasText.java#L97: Document this public method by adding an explicit description.