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nsMaiInterfaceSelection.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 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 Sun Microsystems are Copyright (C) 2002 Sun
 * Microsystems, Inc. All Rights Reserved.
 *
 * Original Author: Silvia Zhao (silvia.zhao@sun.com)
 *
 * Contributor(s): 
 *
 * 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
 * of those above. If you wish to allow use of your version of this file only
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 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsMaiInterfaceSelection.h"

G_BEGIN_DECLS

/* selection interface callbacks */

static void interfaceInitCB(AtkSelectionIface *aIface);
static gboolean addSelectionCB(AtkSelection *aSelection,
                               gint i);
static gboolean clearSelectionCB(AtkSelection *aSelection);
static AtkObject *refSelectionCB(AtkSelection *aSelection,
                                 gint i);
static gint getSelectionCountCB(AtkSelection *aSelection);
static gboolean isChildSelectedCB(AtkSelection *aSelection,
                                  gint i);
static gboolean removeSelectionCB(AtkSelection *aSelection,
                                  gint i);
static gboolean selectAllSelectionCB(AtkSelection *aSelection);

G_END_DECLS

MaiInterfaceSelection::MaiInterfaceSelection(nsAccessibleWrap* aAccWrap):
    MaiInterface(aAccWrap)
{
}

MaiInterfaceSelection::~MaiInterfaceSelection()
{
}

MaiInterfaceType
MaiInterfaceSelection::GetType()
{
    return MAI_INTERFACE_SELECTION;
}

const GInterfaceInfo *
MaiInterfaceSelection::GetInterfaceInfo()
{
    static const GInterfaceInfo atk_if_selection_info = {
        (GInterfaceInitFunc) interfaceInitCB,
        (GInterfaceFinalizeFunc) NULL,
        NULL
    };
    return &atk_if_selection_info;
}

/* static functions */

void
interfaceInitCB(AtkSelectionIface *aIface)
{
    NS_ASSERTION(aIface, "Invalid aIface");
    if (!aIface)
        return;

    aIface->add_selection = addSelectionCB;
    aIface->clear_selection = clearSelectionCB;
    aIface->ref_selection = refSelectionCB;
    aIface->get_selection_count = getSelectionCountCB;
    aIface->is_child_selected = isChildSelectedCB;
    aIface->remove_selection = removeSelectionCB;
    aIface->select_all_selection = selectAllSelectionCB;
}

gboolean
addSelectionCB(AtkSelection *aSelection, gint i)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, FALSE);

    return NS_SUCCEEDED(accSelection->AddChildToSelection(i));
}

gboolean
clearSelectionCB(AtkSelection *aSelection)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, FALSE);

    return NS_SUCCEEDED(accSelection->ClearSelection());
}

AtkObject *
refSelectionCB(AtkSelection *aSelection, gint i)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, nsnull);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, nsnull);

    AtkObject *atkObj = nsnull;
    nsCOMPtr<nsIAccessible> accSelect;
    nsresult rv = accSelection->RefSelection(i, getter_AddRefs(accSelect));
    if (NS_SUCCEEDED(rv) && accSelect) {
        nsIAccessible *tmpAcc = accSelect;
        nsAccessibleWrap *refAccWrap =
            NS_STATIC_CAST(nsAccessibleWrap *, tmpAcc);
        atkObj = refAccWrap->GetAtkObject();
        if (atkObj)
            g_object_ref(atkObj);
    }
    return atkObj;
}

gint
getSelectionCountCB(AtkSelection *aSelection)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, -1);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, -1);

    PRInt32 num = 0;
    nsresult rv = accSelection->GetSelectionCount(&num);
    return (NS_FAILED(rv)) ? -1 : num;
}

gboolean
isChildSelectedCB(AtkSelection *aSelection, gint i)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, FALSE);

    PRBool result = FALSE;
    nsresult rv = accSelection->IsChildSelected(i, &result);
    return (NS_FAILED(rv)) ? FALSE : result;
}

gboolean
removeSelectionCB(AtkSelection *aSelection, gint i)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, FALSE);

    nsresult rv = accSelection->RemoveChildFromSelection(i);
    return (NS_FAILED(rv)) ? FALSE : TRUE;
}

gboolean
selectAllSelectionCB(AtkSelection *aSelection)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(aSelection));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleSelectable> accSelection;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleSelectable),
                            getter_AddRefs(accSelection));
    NS_ENSURE_TRUE(accSelection, FALSE);

    PRBool result = FALSE;
    nsresult rv = accSelection->SelectAllSelection(&result);
    return (NS_FAILED(rv)) ? FALSE : result;
}

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