gecko-dev/accessible/src/base/nsOuterDocAccessible.cpp

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 * Contributor(s):
 * Original Author: Aaron Leventhal (aaronl@netscape.com)
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#include "nsOuterDocAccessible.h"
#include "nsIAccessibilityService.h"
#include "nsIDocument.h"
#include "nsIPresShell.h"
#include "nsIServiceManager.h"
#include "nsIContent.h"

NS_IMPL_ISUPPORTS_INHERITED0(nsOuterDocAccessible, nsAccessible)

nsOuterDocAccessible::nsOuterDocAccessible(nsIDOMNode* aNode, 
                                           nsIWeakReference* aShell):
  nsAccessibleWrap(aNode, aShell)
{
  mAccChildCount = 1;
}

  /* attribute wstring accName; */
NS_IMETHODIMP nsOuterDocAccessible::GetAccName(nsAString& aAccName) 
{ 
  nsCOMPtr<nsIAccessibleDocument> accDoc(do_QueryInterface(mFirstChild));
  if (!accDoc) {
    return NS_ERROR_FAILURE;
  }
  nsresult rv = accDoc->GetTitle(aAccName);
  if (NS_FAILED(rv) || aAccName.IsEmpty())
    rv = accDoc->GetURL(aAccName);
  return rv;
}

NS_IMETHODIMP nsOuterDocAccessible::GetAccValue(nsAString& aAccValue) 
{ 
  return NS_OK;
}

/* unsigned long getAccRole (); */
NS_IMETHODIMP nsOuterDocAccessible::GetAccRole(PRUint32 *_retval)
{
  *_retval = ROLE_CLIENT;
  return NS_OK;
}

NS_IMETHODIMP nsOuterDocAccessible::GetAccState(PRUint32 *aAccState)
{
  return nsAccessible::GetAccState(aAccState);
}

NS_IMETHODIMP nsOuterDocAccessible::AccGetBounds(PRInt32 *x, PRInt32 *y, 
                                                 PRInt32 *width, PRInt32 *height)
{
  return mFirstChild? mFirstChild->AccGetBounds(x, y, width, height): NS_ERROR_FAILURE;
}

NS_IMETHODIMP nsOuterDocAccessible::Init()
{
  nsresult rv = nsAccessibleWrap::Init(); 
  
  // We're in the accessibility cache now
  // In these variable names, "outer" relates to the nsOuterDocAccessible
  // as opposed to the nsDocAccessibleWrap which is "inner".
  // The outer node is a <browser>, <iframe> or <editor> tag, whereas the inner node
  // corresponds to the inner document root.

  nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
  NS_ASSERTION(content, "No nsIContent for <browser>/<iframe>/<editor> dom node");

  nsCOMPtr<nsIDocument> outerDoc;
  content->GetDocument(getter_AddRefs(outerDoc));
  NS_ENSURE_TRUE(outerDoc, NS_ERROR_FAILURE);

  nsCOMPtr<nsIDocument> innerDoc;
  outerDoc->GetSubDocumentFor(content, getter_AddRefs(innerDoc));
  nsCOMPtr<nsIDOMNode> innerNode(do_QueryInterface(innerDoc));
  NS_ENSURE_TRUE(innerNode, NS_ERROR_FAILURE);

  nsCOMPtr<nsIPresShell> innerPresShell;
  innerDoc->GetShellAt(0, getter_AddRefs(innerPresShell));
  NS_ENSURE_TRUE(innerPresShell, NS_ERROR_FAILURE);

  nsCOMPtr<nsIAccessible> innerAccessible;
  nsCOMPtr<nsIAccessibilityService> accService = 
    do_GetService("@mozilla.org/accessibilityService;1");
  accService->GetAccessibleInShell(innerNode, innerPresShell, 
                                   getter_AddRefs(innerAccessible));
  NS_ENSURE_TRUE(innerAccessible, NS_ERROR_FAILURE);

  SetAccFirstChild(innerAccessible); // weak ref
  return innerAccessible->SetAccParent(this);
}