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nsMaiInterfaceHypertext.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/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * 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)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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 "nsMaiInterfaceHypertext.h"
#include "nsIAccessibleDocument.h"
#include "nsPIAccessNode.h"

void
hypertextInterfaceInitCB(AtkHypertextIface *aIface)
{
    g_return_if_fail(aIface != NULL);

    aIface->get_link = getLinkCB;
    aIface->get_n_links = getLinkCountCB;
    aIface->get_link_index = getLinkIndexCB;
}

AtkHyperlink *
getLinkCB(AtkHypertext *aText, gint aLinkIndex)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
    if (!accWrap)
        return nsnull;

    nsCOMPtr<nsIAccessibleHyperText> hyperText;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleHyperText),
                            getter_AddRefs(hyperText));
    NS_ENSURE_TRUE(hyperText, nsnull);

    nsCOMPtr<nsIAccessibleHyperLink> hyperLink;
    nsresult rv = hyperText->GetLink(aLinkIndex, getter_AddRefs(hyperLink));
    if (NS_FAILED(rv) || !hyperLink)
        return nsnull;

    nsCOMPtr<nsIAccessible> hyperLinkAcc(do_QueryInterface(hyperLink));
    AtkObject *hyperLinkAtkObj = nsAccessibleWrap::GetAtkObject(hyperLinkAcc);
    nsAccessibleWrap *accChild = GetAccessibleWrap(hyperLinkAtkObj);
    NS_ENSURE_TRUE(accChild, nsnull);

    MaiHyperlink *maiHyperlink = accChild->GetMaiHyperlink();
    NS_ENSURE_TRUE(maiHyperlink, nsnull);
    return maiHyperlink->GetAtkHyperlink();
}

gint
getLinkCountCB(AtkHypertext *aText)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
    if (!accWrap)
        return -1;

    nsCOMPtr<nsIAccessibleHyperText> hyperText;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleHyperText),
                            getter_AddRefs(hyperText));
    NS_ENSURE_TRUE(hyperText, -1);

    PRInt32 count = -1;
    nsresult rv = hyperText->GetLinkCount(&count);
    NS_ENSURE_SUCCESS(rv, -1);

    return count;
}

gint
getLinkIndexCB(AtkHypertext *aText, gint aCharIndex)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
    if (!accWrap)
        return -1;

    nsCOMPtr<nsIAccessibleHyperText> hyperText;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleHyperText),
                            getter_AddRefs(hyperText));
    NS_ENSURE_TRUE(hyperText, -1);

    PRInt32 index = -1;
    nsresult rv = hyperText->GetLinkIndex(aCharIndex, &index);
    NS_ENSURE_SUCCESS(rv, -1);

    return index;
}

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