gecko/accessible/src/atk/nsMaiInterfaceComponent.cpp

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Sun Microsystems, Inc.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Bolian Yin (bolian.yin@sun.com)
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsMaiInterfaceComponent.h"
#include "nsAccessibleWrap.h"
#include "nsIDOMDocument.h"
#include "nsIDOMDocumentView.h"
#include "nsIDOMAbstractView.h"
#include "nsIDOMWindowInternal.h"
#include "nsIDocShellTreeItem.h"
#include "nsIInterfaceRequestorUtils.h"

void
componentInterfaceInitCB(AtkComponentIface *aIface)
{
    NS_ASSERTION(aIface, "Invalid Interface");
    if(!aIface)
        return;

    /*
     * Use default implementation in atk for contains, get_position,
     * and get_size
     */
    aIface->ref_accessible_at_point = refAccessibleAtPointCB;
    aIface->get_extents = getExtentsCB;
    aIface->grab_focus = grabFocusCB;
}

AtkObject *
refAccessibleAtPointCB(AtkComponent *aComponent,
                       gint aAccX, gint aAccY,
                       AtkCoordType aCoordType)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aComponent));
    if (!accWrap || nsAccUtils::MustPrune(accWrap))
        return nsnull;

    // nsIAccessible getChildAtPoint (x,y) is in screen pixels.
    if (aCoordType == ATK_XY_WINDOW) {
        nsCOMPtr<nsIDOMNode> domNode;
        accWrap->GetDOMNode(getter_AddRefs(domNode));
        nsIntPoint winCoords = nsCoreUtils::GetScreenCoordsForWindow(domNode);
        aAccX += winCoords.x;
        aAccY += winCoords.y;
    }

    nsCOMPtr<nsIAccessible> pointAcc;
    accWrap->GetChildAtPoint(aAccX, aAccY, getter_AddRefs(pointAcc));
    if (!pointAcc) {
        return nsnull;
    }

    AtkObject *atkObj = nsAccessibleWrap::GetAtkObject(pointAcc);
    if (atkObj) {
        g_object_ref(atkObj);
    }
    return atkObj;
}

void
getExtentsCB(AtkComponent *aComponent,
             gint *aAccX,
             gint *aAccY,
             gint *aAccWidth,
             gint *aAccHeight,
             AtkCoordType aCoordType)
{
    *aAccX = *aAccY = *aAccWidth = *aAccHeight = 0;

    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aComponent));
    if (!accWrap)
        return;

    PRInt32 nsAccX, nsAccY, nsAccWidth, nsAccHeight;
    // Returned in screen coordinates
    nsresult rv = accWrap->GetBounds(&nsAccX, &nsAccY,
                                     &nsAccWidth, &nsAccHeight);
    if (NS_FAILED(rv))
        return;
    if (aCoordType == ATK_XY_WINDOW) {
        nsCOMPtr<nsIDOMNode> domNode;
        accWrap->GetDOMNode(getter_AddRefs(domNode));
        nsIntPoint winCoords = nsCoreUtils::GetScreenCoordsForWindow(domNode);
        nsAccX -= winCoords.x;
        nsAccY -= winCoords.y;
    }

    *aAccX = nsAccX;
    *aAccY = nsAccY;
    *aAccWidth = nsAccWidth;
    *aAccHeight = nsAccHeight;
}

gboolean
grabFocusCB(AtkComponent *aComponent)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aComponent));
    if (!accWrap)
        return FALSE;

    nsresult rv = accWrap->TakeFocus();
    return (NS_FAILED(rv)) ? FALSE : TRUE;
}