NS_IMETHODIMP nsComboboxControlFrame::GetAccessible(nsIAccessible** aAccessible)
{
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
if (accService) {
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(mContent);
nsCOMPtr<nsIWeakReference> weakShell(do_GetWeakReference(PresContext()->PresShell()));
return accService->CreateHTMLComboboxAccessible(node, weakShell, aAccessible);
}
return NS_ERROR_FAILURE;
}
PRBool
nsAccUtils::HasAccessibleChildren(nsINode *aNode)
{
if (!aNode)
return PR_FALSE;
nsIPresShell *presShell = nsCoreUtils::GetPresShellFor(aNode);
if (!presShell)
return PR_FALSE;
nsIContent *content = nsCoreUtils::GetRoleContent(aNode);
nsCOMPtr<nsIWeakReference> weakShell(do_GetWeakReference(presShell));
nsAccTreeWalker walker(weakShell, content, PR_FALSE);
nsRefPtr<nsAccessible> accessible = walker.GetNextChild();
return accessible ? PR_TRUE : PR_FALSE;
}
PRBool
nsAccUtils::HasAccessibleChildren(nsIDOMNode *aNode)
{
if (!aNode)
return PR_FALSE;
nsCOMPtr<nsIContent> content(do_QueryInterface(aNode));
if (!content)
return PR_FALSE;
nsCOMPtr<nsIPresShell> presShell = nsCoreUtils::GetPresShellFor(aNode);
if (!presShell)
return PR_FALSE;
nsIFrame *frame = content->GetPrimaryFrame();
if (!frame)
return PR_FALSE;
nsCOMPtr<nsIWeakReference> weakShell(do_GetWeakReference(presShell));
nsAccTreeWalker walker(weakShell, content, PR_FALSE);
nsRefPtr<nsAccessible> accessible = walker.GetNextChild();
return accessible ? PR_TRUE : PR_FALSE;
}
nsHyperTextAccessible*
nsAccUtils::GetTextAccessibleFromSelection(nsISelection* aSelection)
{
// Get accessible from selection's focus DOM point (the DOM point where
// selection is ended).
nsCOMPtr<nsIDOMNode> focusDOMNode;
aSelection->GetFocusNode(getter_AddRefs(focusDOMNode));
if (!focusDOMNode)
return nsnull;
PRInt32 focusOffset = 0;
aSelection->GetFocusOffset(&focusOffset);
nsCOMPtr<nsINode> focusNode(do_QueryInterface(focusDOMNode));
nsCOMPtr<nsINode> resultNode =
nsCoreUtils::GetDOMNodeFromDOMPoint(focusNode, focusOffset);
nsCOMPtr<nsIWeakReference> weakShell(nsCoreUtils::GetWeakShellFor(resultNode));
// Get text accessible containing the result node.
nsAccessible* accessible =
GetAccService()->GetAccessibleOrContainer(resultNode, weakShell);
if (!accessible) {
NS_NOTREACHED("No nsIAccessibleText for selection change event!");
return nsnull;
}
do {
nsHyperTextAccessible* textAcc = accessible->AsHyperText();
if (textAcc)
return textAcc;
} while (accessible = accessible->GetParent());
NS_NOTREACHED("We must reach document accessible implementing nsIAccessibleText!");
return nsnull;
}
