AX: Remove redundant insert of autofill button child in AccessibilityRenderObject::addTextFieldChildren

• Component: Accessibility
• Status: RESOLVED FIXED

[Tyler Wilcock]

This child is represented in the DOM, so there's no reason to also insert it in AccessibilityRenderObject::addTextFieldChildren. This results in duplicate objects for this button in the AX tree. When the autofill button is created, it results in this markup:

<div pseudo="-webkit-textfield-decoration-container">
   <div>
      <div contenteditable="plaintext-only">hello</div>
   </div>
   <div pseudo="-webkit-contacts-auto-fill-button" role="button" aria-label="contact info AutoFill" style="display: block !important;"></div>
</div>

Given this:

```
<input type="text" value="hello" id="textfield">
window.internals.setShowAutoFillButton(document.getElementById("textfield"), "Contacts");
```

Then accessibilityController.accessibleElementById('textfield').childrenCount should be 2 (on non-glib platforms). But it is three. And if we look at what those three are, the first two are expected, and the last is a redundant button object:

Child 0:
AXRole: AXGroup
AXRoleDescription: group
AXSize: NSSize: {114, 13}
AXDescription:


Child 1:
AXRole: AXButton
AXRoleDescription: button
AXSize: NSSize: {23, 13}
AXDescription: contact info AutoFill


Child 2:
AXRole: AXButton
AXRoleDescription: button
AXSize: NSSize: {23, 13}
AXDescription: contact info AutoFill

[Radar WebKit Bug Importer]

<rdar://problem/84474441>

[Tyler Wilcock]

Created attachment 441921 [details]
Patch

[Tyler Wilcock]

cc [e-mail] because I'm modifying some glib expectations and they've been doing GTK AX work recently.

[chris fleizach]

Comment on attachment 441921 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=441921&action=review

> Source/WebCore/ChangeLog:34
> +        Child 0:

this might be a little too in depth for change log. can you summarize these changes a little more succinctly

[Andres Gonzalez]

(In reply to Tyler Wilcock from comment #2)
> Created attachment 441921 [details]
> Patch

--- a/LayoutTests/accessibility/auto-fill-crash.html
+++ a/LayoutTests/accessibility/auto-fill-crash.html

-        var childrenCountExpected = accessibilityController.platformName == "atk" ? "2" : "3";
+        var childrenCountExpected = accessibilityController.platformName == "atk" ? "1" : "2";

Isn't ATK doing it wright and getting 2 children here?

[Tyler Wilcock]

Created attachment 441932 [details]
Patch

[Tyler Wilcock]

Created attachment 441935 [details]
Patch

[Tyler Wilcock]

> this might be a little too in depth for change log. can you summarize these changes a little more succinctly
Done.

>Isn't ATK doing it wright and getting 2 children here?
I would think ATK would expect one less too since we're inserting one less thing into the tree.

[EWS]

Committed r284612 (243339@main): <https://commits.webkit.org/243339@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 441935 [details].