void
nsHTMLSelectListAccessible::CacheOptSiblings(nsIContent *aParentContent)
{
nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
PRUint32 numChildren = aParentContent->GetChildCount();
for (PRUint32 count = 0; count < numChildren; count ++) {
nsIContent *childContent = aParentContent->GetChildAt(count);
if (!childContent->IsHTML()) {
continue;
}
nsCOMPtr<nsIAtom> tag = childContent->Tag();
if (tag == nsAccessibilityAtoms::option ||
tag == nsAccessibilityAtoms::optgroup) {
// Get an accessible for option or optgroup and cache it.
nsRefPtr<nsAccessible> accessible =
GetAccService()->GetOrCreateAccessible(childContent, presShell,
mWeakShell);
if (accessible)
AppendChild(accessible);
// Deep down into optgroup element.
if (tag == nsAccessibilityAtoms::optgroup)
CacheOptSiblings(childContent);
}
}
}
void
nsHTMLSelectListAccessible::CacheChildren()
{
// Cache accessibles for <optgroup> and <option> DOM decendents as children,
// as well as the accessibles for them. Avoid whitespace text nodes. We want
// to count all the <optgroup>s and <option>s as children because we want
// a flat tree under the Select List.
CacheOptSiblings(mContent);
}
already_AddRefed<nsIAccessible>
nsHTMLSelectListAccessible::CacheOptSiblings(nsIAccessibilityService *aAccService,
nsIContent *aParentContent,
nsIAccessible *aLastGoodAccessible,
PRInt32 *aChildCount)
{
// Recursive helper for CacheChildren()
PRUint32 numChildren = aParentContent->GetChildCount();
nsCOMPtr<nsIAccessible> lastGoodAccessible(aLastGoodAccessible);
nsCOMPtr<nsIAccessible> newAccessible;
for (PRUint32 count = 0; count < numChildren; count ++) {
nsIContent *childContent = aParentContent->GetChildAt(count);
if (!childContent->IsNodeOfType(nsINode::eHTML)) {
continue;
}
nsCOMPtr<nsIAtom> tag = childContent->Tag();
if (tag == nsAccessibilityAtoms::option || tag == nsAccessibilityAtoms::optgroup) {
newAccessible = AccessibleForOption(aAccService,
childContent,
lastGoodAccessible,
aChildCount);
if (newAccessible) {
lastGoodAccessible = newAccessible;
}
if (tag == nsAccessibilityAtoms::optgroup) {
newAccessible = CacheOptSiblings(aAccService, childContent,
lastGoodAccessible, aChildCount);
if (newAccessible) {
lastGoodAccessible = newAccessible;
}
}
}
}
if (lastGoodAccessible) {
nsRefPtr<nsAccessible> lastAcc =
nsAccUtils::QueryAccessible(lastGoodAccessible);
lastAcc->SetNextSibling(nsnull);
}
return lastGoodAccessible.forget();
}
void nsHTMLSelectListAccessible::CacheChildren()
{
// Cache the number of <optgroup> and <option> DOM decendents,
// as well as the accessibles for them. Avoid whitespace text nodes.
nsCOMPtr<nsIContent> selectContent(do_QueryInterface(mDOMNode));
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
if (!selectContent || !accService) {
mAccChildCount = eChildCountUninitialized;
return;
}
if (mAccChildCount != eChildCountUninitialized) {
return;
}
mAccChildCount = 0; // Avoid reentry
PRInt32 childCount = 0;
nsCOMPtr<nsIAccessible> lastGoodAccessible =
CacheOptSiblings(accService, selectContent, nsnull, &childCount);
mAccChildCount = childCount;
}
