third_party/WebKit/Source/bindings/modules/v8/custom/V8DeviceMotionEventCustom.cpp

/*
 * Copyright (C) 2010 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "bindings/modules/v8/V8DeviceMotionEvent.h"

#include "bindings/core/v8/V8Binding.h"
#include "modules/device_orientation/DeviceMotionData.h"
#include <v8.h>

namespace blink {

namespace {

DeviceMotionData::Acceleration* readAccelerationArgument(v8::Local<v8::Value> value, v8::Isolate* isolate)
{
    if (isUndefinedOrNull(value))
        return nullptr;

    v8::Local<v8::Context> context = isolate->GetCurrentContext();
    v8::Local<v8::Object> object;
    if (!value->ToObject(context).ToLocal(&object))
        return nullptr;

    v8::Local<v8::Value> xValue;
    if (!object->Get(context, v8AtomicString(isolate, "x")).ToLocal(&xValue))
        return nullptr;
    bool canProvideX = !isUndefinedOrNull(xValue);
    double x;
    V8_CALL(x, xValue, NumberValue(context), return nullptr);

    v8::Local<v8::Value> yValue;
    if (!object->Get(context, v8AtomicString(isolate, "y")).ToLocal(&yValue))
        return nullptr;
    bool canProvideY = !isUndefinedOrNull(yValue);
    double y;
    V8_CALL(y, yValue, NumberValue(context), return nullptr);

    v8::Local<v8::Value> zValue;
    if (!object->Get(context, v8AtomicString(isolate, "z")).ToLocal(&zValue))
        return nullptr;
    bool canProvideZ = !isUndefinedOrNull(zValue);
    double z;
    V8_CALL(z, zValue, NumberValue(context), return nullptr);

    if (!canProvideX && !canProvideY && !canProvideZ)
        return nullptr;

    return DeviceMotionData::Acceleration::create(canProvideX, x, canProvideY, y, canProvideZ, z);
}

DeviceMotionData::RotationRate* readRotationRateArgument(v8::Local<v8::Value> value, v8::Isolate* isolate)
{
    if (isUndefinedOrNull(value))
        return nullptr;

    v8::Local<v8::Context> context = isolate->GetCurrentContext();
    v8::Local<v8::Object> object;
    if (!value->ToObject(context).ToLocal(&object))
        return nullptr;

    v8::Local<v8::Value> alphaValue;
    if (!object->Get(context, v8AtomicString(isolate, "alpha")).ToLocal(&alphaValue))
        return nullptr;
    bool canProvideAlpha = !isUndefinedOrNull(alphaValue);
    double alpha;
    V8_CALL(alpha, alphaValue, NumberValue(context), return nullptr);

    v8::Local<v8::Value> betaValue;
    if (!object->Get(context, v8AtomicString(isolate, "beta")).ToLocal(&betaValue))
        return nullptr;
    bool canProvideBeta = !isUndefinedOrNull(betaValue);
    double beta;
    V8_CALL(beta, betaValue, NumberValue(context), return nullptr);

    v8::Local<v8::Value> gammaValue;
    if (!object->Get(context, v8AtomicString(isolate, "gamma")).ToLocal(&gammaValue))
        return nullptr;
    bool canProvideGamma = !isUndefinedOrNull(gammaValue);
    double gamma;
    V8_CALL(gamma, gammaValue, NumberValue(context), return nullptr);

    if (!canProvideAlpha && !canProvideBeta && !canProvideGamma)
        return nullptr;

    return DeviceMotionData::RotationRate::create(canProvideAlpha, alpha, canProvideBeta, beta, canProvideGamma, gamma);
}

} // namespace

void V8DeviceMotionEvent::initDeviceMotionEventMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
{
    ExceptionState exceptionState(ExceptionState::ExecutionContext, "initDeviceMotionEvent", "DeviceMotionEvent", info.Holder(), info.GetIsolate());
    DeviceMotionEvent* impl = V8DeviceMotionEvent::toImpl(info.Holder());
    v8::Isolate* isolate = info.GetIsolate();
    V8StringResource<> type(info[0]);
    if (!type.prepare())
        return;
    v8::Local<v8::Context> context = info.GetIsolate()->GetCurrentContext();
    bool bubbles;
    V8_CALL(bubbles, info[1], BooleanValue(context), return);
    bool cancelable;
    V8_CALL(cancelable, info[2], BooleanValue(context), return);
    DeviceMotionData::Acceleration* acceleration = readAccelerationArgument(info[3], isolate);
    DeviceMotionData::Acceleration* accelerationIncludingGravity = readAccelerationArgument(info[4], isolate);
    DeviceMotionData::RotationRate* rotationRate = readRotationRateArgument(info[5], isolate);
    bool intervalProvided = !isUndefinedOrNull(info[6]);
    double interval = 0;
    if (intervalProvided) {
        interval = toRestrictedDouble(isolate, info[6], exceptionState);
        if (exceptionState.throwIfNeeded())
            return;
    }
    DeviceMotionData* deviceMotionData = DeviceMotionData::create(acceleration, accelerationIncludingGravity, rotationRate, intervalProvided, interval);
    impl->initDeviceMotionEvent(type, bubbles, cancelable, deviceMotionData);
}

} // namespace blink