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 "JSDeviceMotionEvent.h" 28 29 #if ENABLE(DEVICE_ORIENTATION) 30 31 #include "DeviceMotionData.h" 32 #include "DeviceMotionEvent.h" 33 34 using namespace JSC; 35 36 namespace WebCore { 37 38 static PassRefPtr<DeviceMotionData::Acceleration> readAccelerationArgument(JSValue value, ExecState* exec) 39 { 40 if (value.isUndefinedOrNull()) 41 return 0; 42 43 // Given the above test, this will always yield an object. 44 JSObject* object = value.toObject(exec); 45 46 JSValue xValue = object->get(exec, Identifier(exec, "x")); 47 if (exec->hadException()) 48 return 0; 49 bool canProvideX = !xValue.isUndefinedOrNull(); 50 double x = xValue.toNumber(exec); 51 if (exec->hadException()) 52 return 0; 53 54 JSValue yValue = object->get(exec, Identifier(exec, "y")); 55 if (exec->hadException()) 56 return 0; 57 bool canProvideY = !yValue.isUndefinedOrNull(); 58 double y = yValue.toNumber(exec); 59 if (exec->hadException()) 60 return 0; 61 62 JSValue zValue = object->get(exec, Identifier(exec, "z")); 63 if (exec->hadException()) 64 return 0; 65 bool canProvideZ = !zValue.isUndefinedOrNull(); 66 double z = zValue.toNumber(exec); 67 if (exec->hadException()) 68 return 0; 69 70 if (!canProvideX && !canProvideY && !canProvideZ) 71 return 0; 72 73 return DeviceMotionData::Acceleration::create(canProvideX, x, canProvideY, y, canProvideZ, z); 74 } 75 76 static PassRefPtr<DeviceMotionData::RotationRate> readRotationRateArgument(JSValue value, ExecState* exec) 77 { 78 if (value.isUndefinedOrNull()) 79 return 0; 80 81 // Given the above test, this will always yield an object. 82 JSObject* object = value.toObject(exec); 83 84 JSValue alphaValue = object->get(exec, Identifier(exec, "alpha")); 85 if (exec->hadException()) 86 return 0; 87 bool canProvideAlpha = !alphaValue.isUndefinedOrNull(); 88 double alpha = alphaValue.toNumber(exec); 89 if (exec->hadException()) 90 return 0; 91 92 JSValue betaValue = object->get(exec, Identifier(exec, "beta")); 93 if (exec->hadException()) 94 return 0; 95 bool canProvideBeta = !betaValue.isUndefinedOrNull(); 96 double beta = betaValue.toNumber(exec); 97 if (exec->hadException()) 98 return 0; 99 100 JSValue gammaValue = object->get(exec, Identifier(exec, "gamma")); 101 if (exec->hadException()) 102 return 0; 103 bool canProvideGamma = !gammaValue.isUndefinedOrNull(); 104 double gamma = gammaValue.toNumber(exec); 105 if (exec->hadException()) 106 return 0; 107 108 if (!canProvideAlpha && !canProvideBeta && !canProvideGamma) 109 return 0; 110 111 return DeviceMotionData::RotationRate::create(canProvideAlpha, alpha, canProvideBeta, beta, canProvideGamma, gamma); 112 } 113 114 static JSObject* createAccelerationObject(const DeviceMotionData::Acceleration* acceleration, ExecState* exec) 115 { 116 JSObject* object = constructEmptyObject(exec); 117 object->putDirect(exec->globalData(), Identifier(exec, "x"), acceleration->canProvideX() ? jsNumber(acceleration->x()) : jsNull()); 118 object->putDirect(exec->globalData(), Identifier(exec, "y"), acceleration->canProvideY() ? jsNumber(acceleration->y()) : jsNull()); 119 object->putDirect(exec->globalData(), Identifier(exec, "z"), acceleration->canProvideZ() ? jsNumber(acceleration->z()) : jsNull()); 120 return object; 121 } 122 123 static JSObject* createRotationRateObject(const DeviceMotionData::RotationRate* rotationRate, ExecState* exec) 124 { 125 JSObject* object = constructEmptyObject(exec); 126 object->putDirect(exec->globalData(), Identifier(exec, "alpha"), rotationRate->canProvideAlpha() ? jsNumber(rotationRate->alpha()) : jsNull()); 127 object->putDirect(exec->globalData(), Identifier(exec, "beta"), rotationRate->canProvideBeta() ? jsNumber(rotationRate->beta()) : jsNull()); 128 object->putDirect(exec->globalData(), Identifier(exec, "gamma"), rotationRate->canProvideGamma() ? jsNumber(rotationRate->gamma()) : jsNull()); 129 return object; 130 } 131 132 JSValue JSDeviceMotionEvent::acceleration(ExecState* exec) const 133 { 134 DeviceMotionEvent* imp = static_cast<DeviceMotionEvent*>(impl()); 135 if (!imp->deviceMotionData()->acceleration()) 136 return jsNull(); 137 return createAccelerationObject(imp->deviceMotionData()->acceleration(), exec); 138 } 139 140 JSValue JSDeviceMotionEvent::accelerationIncludingGravity(ExecState* exec) const 141 { 142 DeviceMotionEvent* imp = static_cast<DeviceMotionEvent*>(impl()); 143 if (!imp->deviceMotionData()->accelerationIncludingGravity()) 144 return jsNull(); 145 return createAccelerationObject(imp->deviceMotionData()->accelerationIncludingGravity(), exec); 146 } 147 148 JSValue JSDeviceMotionEvent::rotationRate(ExecState* exec) const 149 { 150 DeviceMotionEvent* imp = static_cast<DeviceMotionEvent*>(impl()); 151 if (!imp->deviceMotionData()->rotationRate()) 152 return jsNull(); 153 return createRotationRateObject(imp->deviceMotionData()->rotationRate(), exec); 154 } 155 156 JSValue JSDeviceMotionEvent::interval(ExecState*) const 157 { 158 DeviceMotionEvent* imp = static_cast<DeviceMotionEvent*>(impl()); 159 if (!imp->deviceMotionData()->canProvideInterval()) 160 return jsNull(); 161 return jsNumber(imp->deviceMotionData()->interval()); 162 } 163 164 JSValue JSDeviceMotionEvent::initDeviceMotionEvent(ExecState* exec) 165 { 166 const String& type = ustringToString(exec->argument(0).toString(exec)); 167 bool bubbles = exec->argument(1).toBoolean(exec); 168 bool cancelable = exec->argument(2).toBoolean(exec); 169 170 // If any of the parameters are null or undefined, mark them as not provided. 171 // Otherwise, use the standard JavaScript conversion. 172 RefPtr<DeviceMotionData::Acceleration> acceleration = readAccelerationArgument(exec->argument(3), exec); 173 if (exec->hadException()) 174 return jsUndefined(); 175 176 RefPtr<DeviceMotionData::Acceleration> accelerationIncludingGravity = readAccelerationArgument(exec->argument(4), exec); 177 if (exec->hadException()) 178 return jsUndefined(); 179 180 RefPtr<DeviceMotionData::RotationRate> rotationRate = readRotationRateArgument(exec->argument(5), exec); 181 if (exec->hadException()) 182 return jsUndefined(); 183 184 bool intervalProvided = !exec->argument(6).isUndefinedOrNull(); 185 double interval = exec->argument(6).toNumber(exec); 186 RefPtr<DeviceMotionData> deviceMotionData = DeviceMotionData::create(acceleration, accelerationIncludingGravity, rotationRate, intervalProvided, interval); 187 DeviceMotionEvent* imp = static_cast<DeviceMotionEvent*>(impl()); 188 imp->initDeviceMotionEvent(type, bubbles, cancelable, deviceMotionData.get()); 189 return jsUndefined(); 190 } 191 192 } // namespace WebCore 193 194 #endif // ENABLE(DEVICE_ORIENTATION) 195
