AOO410/main/vcl/unx/gtk/a11y/atkvalue.cxx

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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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 * specific language governing permissions and limitations
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#include "atkwrapper.hxx"

#include <com/sun/star/accessibility/XAccessibleValue.hpp>

#include <stdio.h>
#include <string.h>

using namespace ::com::sun::star;

static accessibility::XAccessibleValue*
    getValue( AtkValue *pValue ) throw (uno::RuntimeException)
{
    AtkObjectWrapper *pWrap = ATK_OBJECT_WRAPPER( pValue );
    if( pWrap )
    {
        if( !pWrap->mpValue && pWrap->mpContext )
        {
            uno::Any any = pWrap->mpContext->queryInterface( accessibility::XAccessibleValue::static_type(NULL) );
            pWrap->mpValue = reinterpret_cast< accessibility::XAccessibleValue * > (any.pReserved);
            pWrap->mpValue->acquire();
        }
        
        return pWrap->mpValue;
    }
    
    return NULL;
}

static void anyToGValue( uno::Any aAny, GValue *pValue )
{
    // FIXME: expand to lots of types etc.
    double aDouble=0;
    aAny >>= aDouble;

    memset( pValue,  0, sizeof( GValue ) );
    g_value_init( pValue, G_TYPE_DOUBLE );
    g_value_set_double( pValue, aDouble );
}

extern "C" {

static void
value_wrapper_get_current_value( AtkValue *value,
                                 GValue   *gval )
{
    try {
        accessibility::XAccessibleValue* pValue = getValue( value );
        if( pValue )
            anyToGValue( pValue->getCurrentValue(), gval );
    }
    catch(const uno::Exception& e) {
        g_warning( "Exception in getCurrentValue()" );
    }
}

static void
value_wrapper_get_maximum_value( AtkValue *value,
                                 GValue   *gval )
{
    try {
        accessibility::XAccessibleValue* pValue = getValue( value );
        if( pValue )
            anyToGValue( pValue->getMaximumValue(), gval );
    }
    catch(const uno::Exception& e) {
        g_warning( "Exception in getCurrentValue()" );
    }
}

static void
value_wrapper_get_minimum_value( AtkValue *value,
                                 GValue   *gval )
{
    try {
        accessibility::XAccessibleValue* pValue = getValue( value );
        if( pValue )
            anyToGValue( pValue->getMinimumValue(), gval );
    }
    catch(const uno::Exception& e) {
        g_warning( "Exception in getCurrentValue()" );
    }
}

static gboolean
value_wrapper_set_current_value( AtkValue     *value,
                                 const GValue *gval )
{
    try {
        accessibility::XAccessibleValue* pValue = getValue( value );
        if( pValue )
        {
            // FIXME - this needs expanding
            double aDouble = g_value_get_double( gval );
            uno::Any aAny;
            aAny <<= aDouble;
            return pValue->setCurrentValue( aAny );
        }
    }
    catch(const uno::Exception& e) {
        g_warning( "Exception in getCurrentValue()" );
    }

    return FALSE;
}

} // extern "C"

void
valueIfaceInit (AtkValueIface *iface)
{
  g_return_if_fail (iface != NULL);

  iface->get_current_value = value_wrapper_get_current_value;
  iface->get_maximum_value = value_wrapper_get_maximum_value;
  iface->get_minimum_value = value_wrapper_get_minimum_value;
  iface->set_current_value = value_wrapper_set_current_value;
}