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Issue #2721 - Create special case exception for <A>.Click() outside of DOM

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This removes the requirement for there to be a non-null PresShell to
dispatch `Click()` events on `<A>` elements (only), since the exception
to the rule has propagated to the spec.

With these changes it should now be possible do create an anchor and
`Click()` on it from JS without actually first attaching it to the DOM
of the presented document, as abused by scripted downloads in pages
(instead of using the A attribute to custom-name downloads).
This commit is contained in:
Moonchild 2025-06-09 23:45:31 +02:00 • committed by roytam1
commit 37de431ac0
15 changed files with 79 additions and 94 deletions
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13
dom/html/HTMLAnchorElement.cpp
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@ -199,16 +199,9 @@ HTMLAnchorElement::IsHTMLFocusable(bool aWithMouse,
}
// cannot focus links if there is no link handler
nsIDocument* doc = GetComposedDoc();
if (doc) {
nsIPresShell* presShell = doc->GetShell();
if (presShell) {
nsPresContext* presContext = presShell->GetPresContext();
if (presContext && !presContext->GetLinkHandler()) {
*aIsFocusable = false;
return false;
}
}
if (!OwnerDoc()->LinkHandlingEnabled()) {
*aIsFocusable = false;
return false;
}
// Links that are in an editable region should never be focusable, even if