static nsIContent*
GetClickableAncestor(nsIFrame* aFrame, nsIAtom* stopAt = nullptr, nsAutoString* aLabelTargetId = nullptr)
{
// Input events propagate up the content tree so we'll follow the content
// ancestors to look for elements accepting the click.
for (nsIContent* content = aFrame->GetContent(); content;
content = content->GetFlattenedTreeParent()) {
if (stopAt && content->IsHTMLElement(stopAt)) {
break;
}
if (HasTouchListener(content) || HasMouseListener(content)) {
return content;
}
if (content->IsAnyOfHTMLElements(nsGkAtoms::button,
nsGkAtoms::input,
nsGkAtoms::select,
nsGkAtoms::textarea)) {
return content;
}
if (content->IsHTMLElement(nsGkAtoms::label)) {
if (aLabelTargetId) {
content->GetAttr(kNameSpaceID_None, nsGkAtoms::_for, *aLabelTargetId);
}
return content;
}
// Bug 921928: we don't have access to the content of remote iframe.
// So fluffing won't go there. We do an optimistic assumption here:
// that the content of the remote iframe needs to be a target.
if (content->IsHTMLElement(nsGkAtoms::iframe) &&
content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mozbrowser,
nsGkAtoms::_true, eIgnoreCase) &&
content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::Remote,
nsGkAtoms::_true, eIgnoreCase)) {
return content;
}
// See nsCSSFrameConstructor::FindXULTagData. This code is not
// really intended to be used with XUL, though.
if (content->IsAnyOfXULElements(nsGkAtoms::button,
nsGkAtoms::checkbox,
nsGkAtoms::radio,
nsGkAtoms::autorepeatbutton,
nsGkAtoms::menu,
nsGkAtoms::menubutton,
nsGkAtoms::menuitem,
nsGkAtoms::menulist,
nsGkAtoms::scrollbarbutton,
nsGkAtoms::resizer)) {
return content;
}
static nsIContent::AttrValuesArray clickableRoles[] =
{ &nsGkAtoms::button, &nsGkAtoms::key, nullptr };
if (content->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::role,
clickableRoles, eIgnoreCase) >= 0) {
return content;
}
if (content->IsEditable()) {
return content;
}
nsCOMPtr<nsIURI> linkURI;
if (content->IsLink(getter_AddRefs(linkURI))) {
return content;
}
}
return nullptr;
}
static bool
IsElementClickable(nsIFrame* aFrame, nsIAtom* stopAt = nullptr)
{
// Input events propagate up the content tree so we'll follow the content
// ancestors to look for elements accepting the click.
for (nsIContent* content = aFrame->GetContent(); content;
content = content->GetFlattenedTreeParent()) {
nsIAtom* tag = content->Tag();
if (content->IsHTML() && stopAt && tag == stopAt) {
break;
}
if (HasTouchListener(content) || HasMouseListener(content)) {
return true;
}
if (content->IsHTML()) {
if (tag == nsGkAtoms::button ||
tag == nsGkAtoms::input ||
tag == nsGkAtoms::select ||
tag == nsGkAtoms::textarea ||
tag == nsGkAtoms::label) {
return true;
}
// Bug 921928: we don't have access to the content of remote iframe.
// So fluffing won't go there. We do an optimistic assumption here:
// that the content of the remote iframe needs to be a target.
if (tag == nsGkAtoms::iframe &&
content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mozbrowser,
nsGkAtoms::_true, eIgnoreCase) &&
content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::Remote,
nsGkAtoms::_true, eIgnoreCase)) {
return true;
}
} else if (content->IsXUL()) {
nsIAtom* tag = content->Tag();
// See nsCSSFrameConstructor::FindXULTagData. This code is not
// really intended to be used with XUL, though.
if (tag == nsGkAtoms::button ||
tag == nsGkAtoms::checkbox ||
tag == nsGkAtoms::radio ||
tag == nsGkAtoms::autorepeatbutton ||
tag == nsGkAtoms::menu ||
tag == nsGkAtoms::menubutton ||
tag == nsGkAtoms::menuitem ||
tag == nsGkAtoms::menulist ||
tag == nsGkAtoms::scrollbarbutton ||
tag == nsGkAtoms::resizer) {
return true;
}
}
if (content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::role,
nsGkAtoms::button, eIgnoreCase)) {
return true;
}
if (content->IsEditable()) {
return true;
}
nsCOMPtr<nsIURI> linkURI;
if (content->IsLink(getter_AddRefs(linkURI))) {
return true;
}
}
return false;
}