[webkit-changes] [WebKit/WebKit] e7d1f5: Handle empty title attribute tooltips

[Ahmad Saleem]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: e7d1f5b567cb04f64825384d926dd722450663df
      https://github.com/WebKit/WebKit/commit/e7d1f5b567cb04f64825384d926dd722450663df
  Author: Ahmad Saleem <ahmad.saleem792+github at gmail.com>
  Date:   2024-01-04 (Thu, 04 Jan 2024)

  Changed paths:
    A LayoutTests/fast/html/a-tooltip-null-expected.txt
    A LayoutTests/fast/html/a-tooltip-null.html
    M Source/WebCore/rendering/HitTestResult.cpp

  Log Message:
  -----------
  Handle empty title attribute tooltips

https://bugs.webkit.org/show_bug.cgi?id=264702
rdar://problem/118619793

Reviewed by Ryosuke Niwa and Aditya Keerthi.

This patch aligns WebKit with Gecko / Firefox and Blink / Chromium.

Merge: https://chromium.googlesource.com/chromium/blink/+/a57f7f4625cd5d699a41154c67436ae423f7a5e1

The spec [1] tells us that if an element has a title attribute, its value
should be returned as its tooltip/advisory information:

[1] https://html.spec.whatwg.org/#the-title-attribute

Align with how other browsers behave for `<foo title>` and return the
empty string rather than consult the parent element.

NOTE - the tests are modified to work with WebKit Test Infrastructure.

* Source/WebCore/rendering/HitTestResult.cpp:
(HitTestResult::title):
* LayoutTests/fast/html/a-tooltip-null.html: Add Test Case
* LayoutTests/fast/html/a-tooltip-null-expected.txt: Add Test Case Expectation

Canonical link: https://commits.webkit.org/272667@main