65417 Editor: Recognize uppercase URL schemes in link validation.

[nimesh-xecurify]

Updates the regex used in the link dialog to support schemes with uppercase letters. This prevents the editor from prepending http:// to URLs like HTTPS:// or Http://, which are commonly produced by mobile keyboards.

Includes new QUnit tests to verify correct handling of uppercase, mixed-case, fragment, and root-relative URLs.

Trac ticket: https://core.trac.wordpress.org/ticket/65417

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Props nimeshatxecurify, wildworks, irozum, nazmulasif.

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[Copilot]

Pull request overview

This PR updates the link-correction logic used by the editor/link dialog so that URLs with uppercase or mixed-case schemes (e.g. HTTPS://, Http://) are recognized as already having a scheme and are not modified by automatically prepending http://. It also adds QUnit coverage around the updated behavior.

Changes:

• Expand the “has a scheme” regex in both the core link dialog code and the TinyMCE wplink plugin to recognize uppercase scheme letters.
• Add new QUnit tests covering lowercase, uppercase, mixed-case schemes, plus fragment and root-relative URLs.
• Load the wplink script and provide minimal fixture/L10n setup for the new QUnit tests.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tests/qunit/wp-includes/js/wplink.js	Adds QUnit tests for wpLink.correctURL() handling of schemes/fragments/root-relative URLs.
tests/qunit/index.html	Loads wplink.js in the QUnit runner and adds a minimal fixture input + wpLinkL10n stub.
src/js/_enqueues/vendor/tinymce/plugins/wplink/plugin.js	Updates scheme-detection regex to accept uppercase letters in TinyMCE’s wplink flow.
src/js/_enqueues/lib/link.js	Updates scheme-detection regex to accept uppercase letters in wpLink.correctURL().

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.

[nazmulasif]

Test Report
Patch tested: #12103

Environment

• WordPress: 7.1-beta4-20260730.062011
• Subdirectory: No
• PHP: 8.5.8 (cli)
• Server: PHP.wasm (Emscripten 4.0.19 wasm32)
• Database: WP_MySQL_On_SQLite (Server: 8.0.38 / Client: 3.51.0)
• Browser: Chrome 150.0.0.0
• OS: macOS
• Theme: Twenty Twenty-Five 1.5
• MU Plugins: None activated
• Plugins:
  • Classic Editor 1.7.0
  • Test Reports 1.3.0

Steps taken

1. Opened WordPress Playground PR preview for PR 65417 Editor: Recognize uppercase URL schemes in link validation. #12103 (Trac #65417) with the Classic Editor active.
2. Navigated to Posts > Add New and created a Classic Editor instance.
3. Added sample text, selected it, and clicked the Insert/Edit Link icon in the toolbar.
4. Clicked the Link Options gear icon (⚙️) to open the full wpLink modal dialog.
5. In the URL field, entered a URL with an uppercase protocol (https://example.com/ and http://example.com/).
6. Moved focus away from the input field (triggered blur event / wpLink.correctURL()) and submitted the link dialog.
7. Also verified directly in the browser developer console by targeting the modal input DOM element:

   jQuery('#wp-link-url').val('https://example.com/');
   wpLink.correctURL();
   console.log(jQuery('#wp-link-url').val());
   // Result: "https://example.com/"

8. Confirmed that the URL protocol is preserved as entered without prepending http://.

• ✅ Patch is solving the problem

Expected result
URLs containing uppercase or mixed-case protocols (e.g. https://example.com/ or http://example.com/) should be recognized as already having a scheme and should NOT have http:// prepended to create broken double-protocol URLs (http://https/://example.com).

Additional Notes
Tested and verified pull request #12103 for Trac #65417.

Screenshots/Screencast with results
Attached: showing manual test verification in post editor

Support Content
Trac Ticket: https://core.trac.wordpress.org/ticket/65417

WordPress-Playground.mp4