RetroZilla/accessible/src/atk/nsRootAccessibleWrap.cpp

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 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
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 * Original Author: Bolian Yin (bolian.yin@sun.com)
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#include "nsMai.h"
#include "nsRootAccessibleWrap.h"
#include "nsAppRootAccessible.h"
#include "nsIDOMWindow.h"
#include "nsPIDOMWindow.h"
#include "nsIFocusController.h"

nsRootAccessibleWrap::nsRootAccessibleWrap(nsIDOMNode *aDOMNode,
                                           nsIWeakReference* aShell):
    nsRootAccessible(aDOMNode, aShell)
{
    MAI_LOG_DEBUG(("New Root Acc=%p\n", (void*)this));
}

NS_IMETHODIMP nsRootAccessibleWrap::Init()
{
    nsresult rv = nsRootAccessible::Init();
    nsAppRootAccessible *root = nsAppRootAccessible::Create();
    if (root) {
        root->AddRootAccessible(this);
    }
    return rv;
}

nsRootAccessibleWrap::~nsRootAccessibleWrap()
{
    MAI_LOG_DEBUG(("Delete Root Acc=%p\n", (void*)this));
}

NS_IMETHODIMP nsRootAccessibleWrap::Shutdown()
{
    nsAppRootAccessible *root = nsAppRootAccessible::Create();
    if (root) {
        root->RemoveRootAccessible(this);
    }
    return nsRootAccessible::Shutdown();
}

NS_IMETHODIMP nsRootAccessibleWrap::GetParent(nsIAccessible **  aParent)
{
    nsAppRootAccessible *root = nsAppRootAccessible::Create();
    nsresult rv = NS_OK;
    if (root) {
        NS_IF_ADDREF(*aParent = root);
    }
    else {
        *aParent = nsnull;
        rv = NS_ERROR_FAILURE;
    }
    return rv;
}

NS_IMETHODIMP nsRootAccessibleWrap::GetRole(PRUint32 *_retval)
{
    *_retval = ROLE_FRAME;
    return NS_OK;
}

NS_IMETHODIMP nsRootAccessibleWrap::GetExtState(PRUint32 *aState)
{
    nsAccessibleWrap::GetExtState(aState);
    
    nsCOMPtr<nsIDOMWindow> domWin;
    GetWindow(getter_AddRefs(domWin));
    nsCOMPtr<nsPIDOMWindow> privateDOMWindow(do_QueryInterface(domWin));
    if (privateDOMWindow) {
        nsIFocusController *focusController =
            privateDOMWindow->GetRootFocusController();
        PRBool isActive = PR_FALSE;
        focusController->GetActive(&isActive);
        if (isActive) {
            *aState |= EXT_STATE_ACTIVE;
        }
    }
    return NS_OK;
}