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/*
* Copyright (C) 2011, 2012 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "WebKitAccessibleInterfaceValue.h"
#if HAVE(ACCESSIBILITY)
#include "AccessibilityObject.h"
#include "HTMLNames.h"
#include "WebKitAccessibleWrapperAtk.h"
using namespace WebCore;
static AccessibilityObject* core(AtkValue* value)
{
if (!WEBKIT_IS_ACCESSIBLE(value))
return 0;
return webkitAccessibleGetAccessibilityObject(WEBKIT_ACCESSIBLE(value));
}
static void webkitAccessibleValueGetCurrentValue(AtkValue* value, GValue* gValue)
{
memset(gValue, 0, sizeof(GValue));
g_value_init(gValue, G_TYPE_FLOAT);
g_value_set_float(gValue, core(value)->valueForRange());
}
static void webkitAccessibleValueGetMaximumValue(AtkValue* value, GValue* gValue)
{
memset(gValue, 0, sizeof(GValue));
g_value_init(gValue, G_TYPE_FLOAT);
g_value_set_float(gValue, core(value)->maxValueForRange());
}
static void webkitAccessibleValueGetMinimumValue(AtkValue* value, GValue* gValue)
{
memset(gValue, 0, sizeof(GValue));
g_value_init(gValue, G_TYPE_FLOAT);
g_value_set_float(gValue, core(value)->minValueForRange());
}
static gboolean webkitAccessibleValueSetCurrentValue(AtkValue* value, const GValue* gValue)
{
double newValue;
if (G_VALUE_HOLDS_DOUBLE(gValue))
newValue = g_value_get_double(gValue);
else if (G_VALUE_HOLDS_FLOAT(gValue))
newValue = g_value_get_float(gValue);
else if (G_VALUE_HOLDS_INT64(gValue))
newValue = g_value_get_int64(gValue);
else if (G_VALUE_HOLDS_INT(gValue))
newValue = g_value_get_int(gValue);
else if (G_VALUE_HOLDS_LONG(gValue))
newValue = g_value_get_long(gValue);
else if (G_VALUE_HOLDS_ULONG(gValue))
newValue = g_value_get_ulong(gValue);
else if (G_VALUE_HOLDS_UINT64(gValue))
newValue = g_value_get_uint64(gValue);
else if (G_VALUE_HOLDS_UINT(gValue))
newValue = g_value_get_uint(gValue);
else
return false;
AccessibilityObject* coreObject = core(value);
if (!coreObject->canSetValueAttribute())
return FALSE;
// Check value against range limits
newValue = std::max(static_cast<double>(coreObject->minValueForRange()), newValue);
newValue = std::min(static_cast<double>(coreObject->maxValueForRange()), newValue);
coreObject->setValue(String::number(newValue));
return TRUE;
}
static void webkitAccessibleValueGetMinimumIncrement(AtkValue* value, GValue* gValue)
{
memset(gValue, 0, sizeof(GValue));
g_value_init(gValue, G_TYPE_FLOAT);
AccessibilityObject* coreObject = core(value);
if (!coreObject->getAttribute(HTMLNames::stepAttr).isEmpty()) {
g_value_set_float(gValue, coreObject->stepValueForRange());
return;
}
// If 'step' attribute is not defined, WebCore assumes a 5% of the
// range between minimum and maximum values, so return that.
float range = coreObject->maxValueForRange() - coreObject->minValueForRange();
g_value_set_float(gValue, range * 0.05);
}
void webkitAccessibleValueInterfaceInit(AtkValueIface* iface)
{
iface->get_current_value = webkitAccessibleValueGetCurrentValue;
iface->get_maximum_value = webkitAccessibleValueGetMaximumValue;
iface->get_minimum_value = webkitAccessibleValueGetMinimumValue;
iface->set_current_value = webkitAccessibleValueSetCurrentValue;
iface->get_minimum_increment = webkitAccessibleValueGetMinimumIncrement;
}
#endif
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