1/*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "V8DeviceMotionEvent.h"
28
29#if ENABLE(DEVICE_ORIENTATION)
30
31#include "DeviceMotionData.h"
32#include "V8Binding.h"
33#include "V8BindingMacros.h"
34#include "V8Proxy.h"
35
36#include <v8.h>
37
38namespace WebCore {
39
40namespace {
41
42v8::Handle<v8::Value> createAccelerationObject(const DeviceMotionData::Acceleration* acceleration)
43{
44    v8::Local<v8::Object> object = v8::Object::New();
45    object->Set(v8::String::New("x"), acceleration->canProvideX() ? v8::Number::New(acceleration->x()) : v8::Null());
46    object->Set(v8::String::New("y"), acceleration->canProvideY() ? v8::Number::New(acceleration->y()) : v8::Null());
47    object->Set(v8::String::New("z"), acceleration->canProvideZ() ? v8::Number::New(acceleration->z()) : v8::Null());
48    return object;
49}
50
51v8::Handle<v8::Value> createRotationRateObject(const DeviceMotionData::RotationRate* rotationRate)
52{
53    v8::Local<v8::Object> object = v8::Object::New();
54    object->Set(v8::String::New("alpha"), rotationRate->canProvideAlpha() ? v8::Number::New(rotationRate->alpha()) : v8::Null());
55    object->Set(v8::String::New("beta"),  rotationRate->canProvideBeta()  ? v8::Number::New(rotationRate->beta())  : v8::Null());
56    object->Set(v8::String::New("gamma"), rotationRate->canProvideGamma() ? v8::Number::New(rotationRate->gamma()) : v8::Null());
57    return object;
58}
59
60RefPtr<DeviceMotionData::Acceleration> readAccelerationArgument(v8::Local<v8::Value> value)
61{
62    if (isUndefinedOrNull(value))
63        return 0;
64
65    // Given the test above, this will always yield an object.
66    v8::Local<v8::Object> object = value->ToObject();
67
68    v8::Local<v8::Value> xValue = object->Get(v8::String::New("x"));
69    if (xValue.IsEmpty())
70        return 0;
71    bool canProvideX = !isUndefinedOrNull(xValue);
72    double x = xValue->NumberValue();
73
74    v8::Local<v8::Value> yValue = object->Get(v8::String::New("y"));
75    if (yValue.IsEmpty())
76        return 0;
77    bool canProvideY = !isUndefinedOrNull(yValue);
78    double y = yValue->NumberValue();
79
80    v8::Local<v8::Value> zValue = object->Get(v8::String::New("z"));
81    if (zValue.IsEmpty())
82        return 0;
83    bool canProvideZ = !isUndefinedOrNull(zValue);
84    double z = zValue->NumberValue();
85
86    if (!canProvideX && !canProvideY && !canProvideZ)
87        return 0;
88
89    return DeviceMotionData::Acceleration::create(canProvideX, x, canProvideY, y, canProvideZ, z);
90}
91
92RefPtr<DeviceMotionData::RotationRate> readRotationRateArgument(v8::Local<v8::Value> value)
93{
94    if (isUndefinedOrNull(value))
95        return 0;
96
97    // Given the test above, this will always yield an object.
98    v8::Local<v8::Object> object = value->ToObject();
99
100    v8::Local<v8::Value> alphaValue = object->Get(v8::String::New("alpha"));
101    if (alphaValue.IsEmpty())
102        return 0;
103    bool canProvideAlpha = !isUndefinedOrNull(alphaValue);
104    double alpha = alphaValue->NumberValue();
105
106    v8::Local<v8::Value> betaValue = object->Get(v8::String::New("beta"));
107    if (betaValue.IsEmpty())
108        return 0;
109    bool canProvideBeta = !isUndefinedOrNull(betaValue);
110    double beta = betaValue->NumberValue();
111
112    v8::Local<v8::Value> gammaValue = object->Get(v8::String::New("gamma"));
113    if (gammaValue.IsEmpty())
114        return 0;
115    bool canProvideGamma = !isUndefinedOrNull(gammaValue);
116    double gamma = gammaValue->NumberValue();
117
118    if (!canProvideAlpha && !canProvideBeta && !canProvideGamma)
119        return 0;
120
121    return DeviceMotionData::RotationRate::create(canProvideAlpha, alpha, canProvideBeta, beta, canProvideGamma, gamma);
122}
123
124} // namespace
125
126v8::Handle<v8::Value> V8DeviceMotionEvent::accelerationAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
127{
128    INC_STATS("DOM.DeviceMotionEvent.acceleration._get");
129    v8::Handle<v8::Object> holder = info.Holder();
130    DeviceMotionEvent* imp = V8DeviceMotionEvent::toNative(holder);
131    if (!imp->deviceMotionData()->acceleration())
132        return v8::Null();
133    return createAccelerationObject(imp->deviceMotionData()->acceleration());
134}
135
136v8::Handle<v8::Value> V8DeviceMotionEvent::accelerationIncludingGravityAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
137{
138    INC_STATS("DOM.DeviceMotionEvent.accelerationIncludingGravity._get");
139    v8::Handle<v8::Object> holder = info.Holder();
140    DeviceMotionEvent* imp = V8DeviceMotionEvent::toNative(holder);
141    if (!imp->deviceMotionData()->accelerationIncludingGravity())
142        return v8::Null();
143    return createAccelerationObject(imp->deviceMotionData()->accelerationIncludingGravity());
144}
145
146v8::Handle<v8::Value> V8DeviceMotionEvent::rotationRateAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
147{
148    INC_STATS("DOM.DeviceMotionEvent.rotationRate._get");
149    v8::Handle<v8::Object> holder = info.Holder();
150    DeviceMotionEvent* imp = V8DeviceMotionEvent::toNative(holder);
151    if (!imp->deviceMotionData()->rotationRate())
152        return v8::Null();
153    return createRotationRateObject(imp->deviceMotionData()->rotationRate());
154}
155
156v8::Handle<v8::Value> V8DeviceMotionEvent::intervalAccessorGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
157{
158    INC_STATS("DOM.DeviceMotionEvent.interval._get");
159    v8::Handle<v8::Object> holder = info.Holder();
160    DeviceMotionEvent* imp = V8DeviceMotionEvent::toNative(holder);
161    if (!imp->deviceMotionData()->canProvideInterval())
162        return v8::Null();
163    return v8::Number::New(imp->deviceMotionData()->interval());
164}
165
166v8::Handle<v8::Value> V8DeviceMotionEvent::initDeviceMotionEventCallback(const v8::Arguments& args)
167{
168    DeviceMotionEvent* imp = V8DeviceMotionEvent::toNative(args.Holder());
169    STRING_TO_V8PARAMETER_EXCEPTION_BLOCK(V8Parameter<>, type, args[0]);
170    bool bubbles = args[1]->BooleanValue();
171    bool cancelable = args[2]->BooleanValue();
172    RefPtr<DeviceMotionData::Acceleration> acceleration = readAccelerationArgument(args[3]);
173    RefPtr<DeviceMotionData::Acceleration> accelerationIncludingGravity = readAccelerationArgument(args[4]);
174    RefPtr<DeviceMotionData::RotationRate> rotationRate = readRotationRateArgument(args[5]);
175    bool intervalProvided = !isUndefinedOrNull(args[6]);
176    double interval = args[6]->NumberValue();
177    RefPtr<DeviceMotionData> deviceMotionData = DeviceMotionData::create(acceleration, accelerationIncludingGravity, rotationRate, intervalProvided, interval);
178    imp->initDeviceMotionEvent(type, bubbles, cancelable, deviceMotionData.get());
179    return v8::Handle<v8::Value>();
180}
181
182} // namespace WebCore
183
184#endif // ENABLE(DEVICE_ORIENTATION)
185