gecko/accessible/src/atk/nsMaiInterfaceValue.cpp

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 * 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
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 *
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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):
 *   Silvia Zhao (silvia.zhao@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 "nsMaiInterfaceValue.h"

void
valueInterfaceInitCB(AtkValueIface *aIface)
{
    NS_ASSERTION(aIface, "Invalid aIface");
    if (!aIface)
        return;

    aIface->get_current_value = getCurrentValueCB;
    aIface->get_maximum_value = getMaximumValueCB;
    aIface->get_minimum_value = getMinimumValueCB;
    aIface->get_minimum_increment = getMinimumIncrementCB;
    aIface->set_current_value = setCurrentValueCB;
}

void
getCurrentValueCB(AtkValue *obj, GValue *value)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
    if (!accWrap)
        return;

    nsCOMPtr<nsIAccessibleValue> accValue;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleValue),
                            getter_AddRefs(accValue));
    if (!accValue)
        return;

    memset (value,  0, sizeof (GValue));
    double accDouble;
    if (NS_FAILED(accValue->GetCurrentValue(&accDouble)))
        return;
    g_value_init (value, G_TYPE_DOUBLE);
    g_value_set_double (value, accDouble);
}

void
getMaximumValueCB(AtkValue *obj, GValue *value)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
    if (!accWrap)
        return;

    nsCOMPtr<nsIAccessibleValue> accValue;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleValue),
                            getter_AddRefs(accValue));
    if (!accValue)
        return;

    memset (value,  0, sizeof (GValue));
    double accDouble;
    if (NS_FAILED(accValue->GetMaximumValue(&accDouble)))
        return;
    g_value_init (value, G_TYPE_DOUBLE);
    g_value_set_double (value, accDouble);
}

void
getMinimumValueCB(AtkValue *obj, GValue *value)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
    if (!accWrap)
        return;

    nsCOMPtr<nsIAccessibleValue> accValue;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleValue),
                            getter_AddRefs(accValue));
    if (!accValue)
        return;

    memset (value,  0, sizeof (GValue));
    double accDouble;
    if (NS_FAILED(accValue->GetMinimumValue(&accDouble)))
        return;
    g_value_init (value, G_TYPE_DOUBLE);
    g_value_set_double (value, accDouble);
}

void
getMinimumIncrementCB(AtkValue *obj, GValue *minimumIncrement)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
    if (!accWrap)
        return;

    nsCOMPtr<nsIAccessibleValue> accValue;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleValue),
                            getter_AddRefs(accValue));
    if (!accValue)
        return;

    memset (accValue,  0, sizeof (GValue));
    double accDouble;
    if (NS_FAILED(accValue->GetMinimumIncrement(&accDouble)))
        return;
    g_value_init (minimumIncrement, G_TYPE_DOUBLE);
    g_value_set_double (minimumIncrement, accDouble);
}

gboolean
setCurrentValueCB(AtkValue *obj, const GValue *value)
{
    nsAccessibleWrap *accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
    NS_ENSURE_TRUE(accWrap, FALSE);

    nsCOMPtr<nsIAccessibleValue> accValue;
    accWrap->QueryInterface(NS_GET_IID(nsIAccessibleValue),
                            getter_AddRefs(accValue));
    NS_ENSURE_TRUE(accValue, FALSE);

    double accDouble =g_value_get_double (value);
    return !NS_FAILED(accValue->SetCurrentValue(accDouble));
}