8213781: web page background renders blue in JEditorPane

[TheMangovnik]

Backport of JDK-8213781 - web page background renders blue in JEditorPane

Fixing JEditorPane that for some webpages renders the background blue instead white. E.g. http://www.google.com/

Clean backport.
Passed tier1 tests. Existing failures are the same as on the unpatched code, they are unrelated.
Passed gtests.

GH Actions are passing.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8213781 needs maintainer approval
• JDK-4895924 needs maintainer approval

Warning

 ⚠️ Found leading lowercase letter in issue title for 8213781: web page background renders blue in JEditorPane

Issues

• JDK-8213781: web page background renders blue in JEditorPane (Bug - P3 - Requested)
• JDK-4895924: Strings in format #rgb not handled by Color.decode() (affects CSS / Swing) (Bug - P4 - Requested)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk11u-dev.git pull/3118/head:pull/3118
$ git checkout pull/3118

Update a local copy of the PR:
$ git checkout pull/3118
$ git pull https://git.openjdk.org/jdk11u-dev.git pull/3118/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 3118

View PR using the GUI difftool:
$ git pr show -t 3118

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk11u-dev/pull/3118.diff

Using Webrev

Link to Webrev Comment

[bridgekeeper]

Hi @TheMangovnik, welcome to this OpenJDK project and thanks for contributing!

We do not recognize you as Contributor and need to ensure you have signed the Oracle Contributor Agreement (OCA). If you have not signed the OCA, please follow the instructions. Please fill in your GitHub username in the "Username" field of the application. Once you have signed the OCA, please let us know by writing /signed in a comment in this pull request.

If you already are an OpenJDK Author, Committer or Reviewer, please click here to open a new issue so that we can record that fact. Please use "Add GitHub user TheMangovnik" as summary for the issue.

If you are contributing this work on behalf of your employer and your employer has signed the OCA, please let us know by writing /covered in a comment in this pull request.

[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

This backport pull request has now been updated with issues from the original commit.

[TheMangovnik]

/covered

[bridgekeeper]

Thank you! Please allow for a few business days to verify that your employer has signed the OCA. Also, please note that pull requests that are pending an OCA check will not usually be evaluated, so your patience is appreciated!

[openjdk]

⚠️ @TheMangovnik This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mlbridge]

Webrevs

• 00: Full (80da9973)

[TheMangovnik]

/approval request Clean back port fixing background rendering for some webpages when JEditorPane is used. Tests run on fedora 43. Gtests passed, same T1 failing before and after the backport - not related to this issue.

[openjdk]

@TheMangovnik
8213781: The approval request has been created successfully.
4895924: The approval request has been created successfully.