/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "InterfaceInitFuncs.h"

#include "AccessibleWrap.h"

#include "nsMai.h"

#include "ProxyAccessible.h"

#include "mozilla/FloatingPoint.h"

#include "mozilla/Likely.h"

using namespace mozilla;

using namespace mozilla::a11y;

extern "C" {

static void

getCurrentValueCB(AtkValue *obj, GValue *value)

{

  ProxyAccessible* proxy = nullptr;

  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));

  if (!accWrap) {

    proxy = GetProxy(ATK_OBJECT(obj));

    if (!proxy) {

      return;

    }

  }

  memset (value,  0, sizeof (GValue));

  double accValue = accWrap ? accWrap->CurValue() : proxy->CurValue();

  if (IsNaN(accValue))

    return;

  g_value_init (value, G_TYPE_DOUBLE);

  g_value_set_double (value, accValue);

}

static void

getMaximumValueCB(AtkValue *obj, GValue *value)

{

  ProxyAccessible* proxy = nullptr;

  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));

  if (!accWrap) {

    proxy = GetProxy(ATK_OBJECT(obj));

    if (!proxy) {

      return;

    }

  }

  memset(value,  0, sizeof (GValue));

  double accValue = accWrap ? accWrap->MaxValue() : proxy->MaxValue();

  if (IsNaN(accValue))

    return;

  g_value_init(value, G_TYPE_DOUBLE);

  g_value_set_double(value, accValue);

}

static void

getMinimumValueCB(AtkValue *obj, GValue *value)

{

  ProxyAccessible* proxy = nullptr;

  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));

  if (!accWrap) {

    proxy = GetProxy(ATK_OBJECT(obj));

    if (!proxy) {

      return;

    }

  }

  memset(value,  0, sizeof (GValue));

  double accValue = accWrap ? accWrap->MinValue() : proxy->MinValue();

  if (IsNaN(accValue))

    return;

  g_value_init(value, G_TYPE_DOUBLE);

  g_value_set_double(value, accValue);

}

static void

getMinimumIncrementCB(AtkValue *obj, GValue *minimumIncrement)

{

  ProxyAccessible* proxy = nullptr;

  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));

  if (!accWrap) {

    proxy = GetProxy(ATK_OBJECT(obj));

    if (!proxy) {

      return;

    }

  }

  memset(minimumIncrement,  0, sizeof (GValue));

  double accValue = accWrap ? accWrap->Step() : proxy->Step();

  if (IsNaN(accValue))

    accValue = 0; // zero if the minimum increment is undefined

  g_value_init(minimumIncrement, G_TYPE_DOUBLE);

  g_value_set_double(minimumIncrement, accValue);

}

static gboolean

setCurrentValueCB(AtkValue *obj, const GValue *value)

{

  ProxyAccessible* proxy = nullptr;

  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));

  if (!accWrap) {

    proxy = GetProxy(ATK_OBJECT(obj));

    if (!proxy) {

      return FALSE;

    }

  }

  double accValue =g_value_get_double(value);

  return accWrap ? accWrap->SetCurValue(accValue) : proxy->SetCurValue(accValue);

}

}

void

valueInterfaceInitCB(AtkValueIface* aIface)

{

  NS_ASSERTION(aIface, "Invalid aIface");

  if (MOZ_UNLIKELY(!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;

}