WebCore/bindings/v8/custom/V8GeolocationCustom.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 2009 Google 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.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "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 "config.h"

 #include "Geolocation.h"
 #include "V8Binding.h"
 #include "V8CustomBinding.h"
 #include "V8CustomPositionCallback.h"
 #include "V8CustomPositionErrorCallback.h"
 #include "V8Proxy.h"


 using namespace std;
 using namespace WTF;

 namespace WebCore {

 static const char* typeMismatchError = "TYPE_MISMATCH_ERR: DOM Exception 17";

 static void throwTypeMismatchException()
 {
     V8Proxy::throwError(V8Proxy::GeneralError, typeMismatchError);
 }

 static PassRefPtr<PositionCallback> createPositionCallback(v8::Local<v8::Value> value, bool& succeeded)
 {
     succeeded = true;

     // The spec specifies 'FunctionOnly' for this object.
     if (!value->IsFunction()) {
         succeeded = false;
         throwTypeMismatchException();
         return 0;
     }

     Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
     return V8CustomPositionCallback::create(value, frame);
 }

 static PassRefPtr<PositionErrorCallback> createPositionErrorCallback(v8::Local<v8::Value> value, bool& succeeded)
 {
     succeeded = true;

     // Argument is optional (hence undefined is allowed), and null is allowed.
     if (isUndefinedOrNull(value))
         return 0;

     // The spec specifies 'FunctionOnly' for this object.
     if (!value->IsFunction()) {
         succeeded = false;
         throwTypeMismatchException();
         return 0;
     }

     Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
     return V8CustomPositionErrorCallback::create(value, frame);
 }

 static PassRefPtr<PositionOptions> createPositionOptions(v8::Local<v8::Value> value, bool& succeeded)
 {
     succeeded = true;

     // Create default options.
     RefPtr<PositionOptions> options = PositionOptions::create();

     // Argument is optional (hence undefined is allowed), and null is allowed.
     if (isUndefinedOrNull(value)) {
         // Use default options.
         return options.release();
     }

     // Given the above test, this will always yield an object.
     v8::Local<v8::Object> object = value->ToObject();

     // For all three properties, we apply the following ...
     // - If the getter or the property's valueOf method throws an exception, we
     //   quit so as not to risk overwriting the exception.
     // - If the value is absent or undefined, we don't override the default.
     v8::Local<v8::Value> enableHighAccuracyValue = object->Get(v8::String::New("enableHighAccuracy"));
     if (enableHighAccuracyValue.IsEmpty()) {
         succeeded = false;
         return 0;
     }
     if (!enableHighAccuracyValue->IsUndefined()) {
         v8::Local<v8::Boolean> enableHighAccuracyBoolean = enableHighAccuracyValue->ToBoolean();
         if (enableHighAccuracyBoolean.IsEmpty()) {
             succeeded = false;
             return 0;
         }
         options->setEnableHighAccuracy(enableHighAccuracyBoolean->Value());
     }

     v8::Local<v8::Value> timeoutValue = object->Get(v8::String::New("timeout"));
     if (timeoutValue.IsEmpty()) {
         succeeded = false;
         return 0;
     }
     if (!timeoutValue->IsUndefined()) {
         v8::Local<v8::Number> timeoutNumber = timeoutValue->ToNumber();
         if (timeoutNumber.IsEmpty()) {
             succeeded = false;
             return 0;
         }
         double timeoutDouble = timeoutNumber->Value();
         // V8 does not export a public symbol for infinity, so we must use a
         // platform type. On Android, it seems that V8 uses 0xf70f000000000000,
         // which is the standard way to represent infinity in a double. However,
         // numeric_limits<double>::infinity uses the system HUGE_VAL, which is
         // different. Therefore we test using isinf() and check that the value
         // is positive, which seems to handle things correctly.
         // If the value is infinity, there's nothing to do.
         if (!(isinf(timeoutDouble) && timeoutDouble > 0)) {
             v8::Local<v8::Int32> timeoutInt32 = timeoutValue->ToInt32();
             if (timeoutInt32.IsEmpty()) {
                 succeeded = false;
                 return 0;
             }
             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
             options->setTimeout(max(0, timeoutInt32->Value()));
         }
     }

     v8::Local<v8::Value> maximumAgeValue = object->Get(v8::String::New("maximumAge"));
     if (maximumAgeValue.IsEmpty()) {
         succeeded = false;
         return 0;
     }
     if (!maximumAgeValue->IsUndefined()) {
         v8::Local<v8::Number> maximumAgeNumber = maximumAgeValue->ToNumber();
         if (maximumAgeNumber.IsEmpty()) {
             succeeded = false;
             return 0;
         }
         double maximumAgeDouble = maximumAgeNumber->Value();
         if (isinf(maximumAgeDouble) && maximumAgeDouble > 0) {
             // If the value is infinity, clear maximumAge.
             options->clearMaximumAge();
         } else {
             v8::Local<v8::Int32> maximumAgeInt32 = maximumAgeValue->ToInt32();
             if (maximumAgeInt32.IsEmpty()) {
                 succeeded = false;
                 return 0;
             }
             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
             options->setMaximumAge(max(0, maximumAgeInt32->Value()));
         }
     }

     return options.release();
 }

 CALLBACK_FUNC_DECL(GeolocationGetCurrentPosition)
 {
     INC_STATS("DOM.Geolocation.getCurrentPosition()");

     bool succeeded = false;

     RefPtr<PositionCallback> positionCallback = createPositionCallback(args[0], succeeded);
     if (!succeeded)
         return v8::Undefined();
     ASSERT(positionCallback);

     RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(args[1], succeeded);
     if (!succeeded)
         return v8::Undefined();

     RefPtr<PositionOptions> positionOptions = createPositionOptions(args[2], succeeded);
     if (!succeeded)
         return v8::Undefined();
     ASSERT(positionOptions);

     Geolocation* geolocation = V8DOMWrapper::convertToNativeObject<Geolocation>(V8ClassIndex::GEOLOCATION, args.Holder());
     geolocation->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
     return v8::Undefined();
 }

 CALLBACK_FUNC_DECL(GeolocationWatchPosition)
 {
     INC_STATS("DOM.Geolocation.watchPosition()");

     bool succeeded = false;

     RefPtr<PositionCallback> positionCallback = createPositionCallback(args[0], succeeded);
     if (!succeeded)
         return v8::Undefined();
     ASSERT(positionCallback);

     RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(args[1], succeeded);
     if (!succeeded)
         return v8::Undefined();

     RefPtr<PositionOptions> positionOptions = createPositionOptions(args[2], succeeded);
     if (!succeeded)
         return v8::Undefined();
     ASSERT(positionOptions);

     Geolocation* geolocation = V8DOMWrapper::convertToNativeObject<Geolocation>(V8ClassIndex::GEOLOCATION, args.Holder());
     int watchId = geolocation->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
     return v8::Number::New(watchId);
 }

 } // namespace WebCore
	/*
	* Copyright (C) 2009 Google 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.
	* * Neither the name of Google Inc. nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "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 "config.h"

	#include "Geolocation.h"
	#include "V8Binding.h"
	#include "V8CustomBinding.h"
	#include "V8CustomPositionCallback.h"
	#include "V8CustomPositionErrorCallback.h"
	#include "V8Proxy.h"


	using namespace std;
	using namespace WTF;

	namespace WebCore {

	static const char* typeMismatchError = "TYPE_MISMATCH_ERR: DOM Exception 17";

	static void throwTypeMismatchException()
	{
	V8Proxy::throwError(V8Proxy::GeneralError, typeMismatchError);
	}

	static PassRefPtr<PositionCallback> createPositionCallback(v8::Local<v8::Value> value, bool& succeeded)
	{
	succeeded = true;

	// The spec specifies 'FunctionOnly' for this object.
	if (!value->IsFunction()) {
	succeeded = false;
	throwTypeMismatchException();
	return 0;
	}

	Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
	return V8CustomPositionCallback::create(value, frame);
	}

	static PassRefPtr<PositionErrorCallback> createPositionErrorCallback(v8::Local<v8::Value> value, bool& succeeded)
	{
	succeeded = true;

	// Argument is optional (hence undefined is allowed), and null is allowed.
	if (isUndefinedOrNull(value))
	return 0;

	// The spec specifies 'FunctionOnly' for this object.
	if (!value->IsFunction()) {
	succeeded = false;
	throwTypeMismatchException();
	return 0;
	}

	Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
	return V8CustomPositionErrorCallback::create(value, frame);
	}

	static PassRefPtr<PositionOptions> createPositionOptions(v8::Local<v8::Value> value, bool& succeeded)
	{
	succeeded = true;

	// Create default options.
	RefPtr<PositionOptions> options = PositionOptions::create();

	// Argument is optional (hence undefined is allowed), and null is allowed.
	if (isUndefinedOrNull(value)) {
	// Use default options.
	return options.release();
	}

	// Given the above test, this will always yield an object.
	v8::Local<v8::Object> object = value->ToObject();

	// For all three properties, we apply the following ...
	// - If the getter or the property's valueOf method throws an exception, we
	// quit so as not to risk overwriting the exception.
	// - If the value is absent or undefined, we don't override the default.
	v8::Local<v8::Value> enableHighAccuracyValue = object->Get(v8::String::New("enableHighAccuracy"));
	if (enableHighAccuracyValue.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	if (!enableHighAccuracyValue->IsUndefined()) {
	v8::Local<v8::Boolean> enableHighAccuracyBoolean = enableHighAccuracyValue->ToBoolean();
	if (enableHighAccuracyBoolean.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	options->setEnableHighAccuracy(enableHighAccuracyBoolean->Value());
	}

	v8::Local<v8::Value> timeoutValue = object->Get(v8::String::New("timeout"));
	if (timeoutValue.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	if (!timeoutValue->IsUndefined()) {
	v8::Local<v8::Number> timeoutNumber = timeoutValue->ToNumber();
	if (timeoutNumber.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	double timeoutDouble = timeoutNumber->Value();
	// V8 does not export a public symbol for infinity, so we must use a
	// platform type. On Android, it seems that V8 uses 0xf70f000000000000,
	// which is the standard way to represent infinity in a double. However,
	// numeric_limits<double>::infinity uses the system HUGE_VAL, which is
	// different. Therefore we test using isinf() and check that the value
	// is positive, which seems to handle things correctly.
	// If the value is infinity, there's nothing to do.
	if (!(isinf(timeoutDouble) && timeoutDouble > 0)) {
	v8::Local<v8::Int32> timeoutInt32 = timeoutValue->ToInt32();
	if (timeoutInt32.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	// Wrap to int32 and force non-negative to match behavior of window.setTimeout.
	options->setTimeout(max(0, timeoutInt32->Value()));
	}
	}

	v8::Local<v8::Value> maximumAgeValue = object->Get(v8::String::New("maximumAge"));
	if (maximumAgeValue.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	if (!maximumAgeValue->IsUndefined()) {
	v8::Local<v8::Number> maximumAgeNumber = maximumAgeValue->ToNumber();
	if (maximumAgeNumber.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	double maximumAgeDouble = maximumAgeNumber->Value();
	if (isinf(maximumAgeDouble) && maximumAgeDouble > 0) {
	// If the value is infinity, clear maximumAge.
	options->clearMaximumAge();
	} else {
	v8::Local<v8::Int32> maximumAgeInt32 = maximumAgeValue->ToInt32();
	if (maximumAgeInt32.IsEmpty()) {
	succeeded = false;
	return 0;
	}
	// Wrap to int32 and force non-negative to match behavior of window.setTimeout.
	options->setMaximumAge(max(0, maximumAgeInt32->Value()));
	}
	}

	return options.release();
	}

	CALLBACK_FUNC_DECL(GeolocationGetCurrentPosition)
	{
	INC_STATS("DOM.Geolocation.getCurrentPosition()");

	bool succeeded = false;

	RefPtr<PositionCallback> positionCallback = createPositionCallback(args[0], succeeded);
	if (!succeeded)
	return v8::Undefined();
	ASSERT(positionCallback);

	RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(args[1], succeeded);
	if (!succeeded)
	return v8::Undefined();

	RefPtr<PositionOptions> positionOptions = createPositionOptions(args[2], succeeded);
	if (!succeeded)
	return v8::Undefined();
	ASSERT(positionOptions);

	Geolocation* geolocation = V8DOMWrapper::convertToNativeObject<Geolocation>(V8ClassIndex::GEOLOCATION, args.Holder());
	geolocation->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
	return v8::Undefined();
	}

	CALLBACK_FUNC_DECL(GeolocationWatchPosition)
	{
	INC_STATS("DOM.Geolocation.watchPosition()");

	bool succeeded = false;

	RefPtr<PositionCallback> positionCallback = createPositionCallback(args[0], succeeded);
	if (!succeeded)
	return v8::Undefined();
	ASSERT(positionCallback);

	RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(args[1], succeeded);
	if (!succeeded)
	return v8::Undefined();

	RefPtr<PositionOptions> positionOptions = createPositionOptions(args[2], succeeded);
	if (!succeeded)
	return v8::Undefined();
	ASSERT(positionOptions);

	Geolocation* geolocation = V8DOMWrapper::convertToNativeObject<Geolocation>(V8ClassIndex::GEOLOCATION, args.Holder());
	int watchId = geolocation->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
	return v8::Number::New(watchId);
	}

	} // namespace WebCore