src/third_party/WebKit/Source/bindings/v8/custom/V8GeolocationCustom.cpp

   1 /*
   2  * Copyright 2009, The Android Open Source Project
   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,
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  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "V8Geolocation.h"
  28
  29 #include "V8PositionCallback.h"
  30 #include "V8PositionErrorCallback.h"
  31 #include "bindings/v8/V8Binding.h"
  32 #include "bindings/v8/V8Callback.h"
  33 #include "bindings/v8/V8Utilities.h"
  34 #include "modules/geolocation/Geolocation.h"
  35
  36 using namespace std;
  37 using namespace WTF;
  38
  39 namespace WebCore {
  40
  41 static PassRefPtrWillBeRawPtr<PositionOptions> createPositionOptions(v8::Local<v8::Value> value, v8::Isolate* isolate, bool& succeeded)
  42 {
  43     succeeded = true;
  44
  45     // Create default options.
  46     RefPtrWillBeRawPtr<PositionOptions> options = PositionOptions::create();
  47
  48     // Argument is optional (hence undefined is allowed), and null is allowed.
  49     if (isUndefinedOrNull(value)) {
  50         // Use default options.
  51         return options.release();
  52     }
  53
  54     // Given the above test, this will always yield an object.
  55     v8::Local<v8::Object> object = value->ToObject();
  56
  57     // For all three properties, we apply the following ...
  58     // - If the getter or the property's valueOf method throws an exception, we
  59     //   quit so as not to risk overwriting the exception.
  60     // - If the value is absent or undefined, we don't override the default.
  61     v8::Local<v8::Value> enableHighAccuracyValue = object->Get(v8AtomicString(isolate, "enableHighAccuracy"));
  62     if (enableHighAccuracyValue.IsEmpty()) {
  63         succeeded = false;
  64         return 0;
  65     }
  66     if (!enableHighAccuracyValue->IsUndefined()) {
  67         v8::Local<v8::Boolean> enableHighAccuracyBoolean = enableHighAccuracyValue->ToBoolean();
  68         if (enableHighAccuracyBoolean.IsEmpty()) {
  69             succeeded = false;
  70             return 0;
  71         }
  72         options->setEnableHighAccuracy(enableHighAccuracyBoolean->Value());
  73     }
  74
  75     v8::Local<v8::Value> timeoutValue = object->Get(v8AtomicString(isolate, "timeout"));
  76     if (timeoutValue.IsEmpty()) {
  77         succeeded = false;
  78         return 0;
  79     }
  80     if (!timeoutValue->IsUndefined()) {
  81         v8::Local<v8::Number> timeoutNumber = timeoutValue->ToNumber();
  82         if (timeoutNumber.IsEmpty()) {
  83             succeeded = false;
  84             return 0;
  85         }
  86         double timeoutDouble = timeoutNumber->Value();
  87         // If the value is positive infinity, there's nothing to do.
  88         if (!(std::isinf(timeoutDouble) && timeoutDouble > 0)) {
  89             v8::Local<v8::Int32> timeoutInt32 = timeoutValue->ToInt32();
  90             if (timeoutInt32.IsEmpty()) {
  91                 succeeded = false;
  92                 return 0;
  93             }
  94             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
  95             options->setTimeout(max(0, timeoutInt32->Value()));
  96         }
  97     }
  98
  99     v8::Local<v8::Value> maximumAgeValue = object->Get(v8AtomicString(isolate, "maximumAge"));
 100     if (maximumAgeValue.IsEmpty()) {
 101         succeeded = false;
 102         return 0;
 103     }
 104     if (!maximumAgeValue->IsUndefined()) {
 105         v8::Local<v8::Number> maximumAgeNumber = maximumAgeValue->ToNumber();
 106         if (maximumAgeNumber.IsEmpty()) {
 107             succeeded = false;
 108             return 0;
 109         }
 110         double maximumAgeDouble = maximumAgeNumber->Value();
 111         if (std::isinf(maximumAgeDouble) && maximumAgeDouble > 0) {
 112             // If the value is positive infinity, clear maximumAge.
 113             options->clearMaximumAge();
 114         } else {
 115             v8::Local<v8::Int32> maximumAgeInt32 = maximumAgeValue->ToInt32();
 116             if (maximumAgeInt32.IsEmpty()) {
 117                 succeeded = false;
 118                 return 0;
 119             }
 120             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
 121             options->setMaximumAge(max(0, maximumAgeInt32->Value()));
 122         }
 123     }
 124
 125     return options.release();
 126 }
 127
 128 void V8Geolocation::getCurrentPositionMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 129 {
 130     bool succeeded = false;
 131
 132     OwnPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<V8PositionCallback>(info[0], succeeded, info.GetIsolate());
 133     if (!succeeded)
 134         return;
 135     ASSERT(positionCallback);
 136
 137     // Argument is optional (hence undefined is allowed), and null is allowed.
 138     OwnPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<V8PositionErrorCallback>(info[1], succeeded, info.GetIsolate(), CallbackAllowUndefined | CallbackAllowNull);
 139     if (!succeeded)
 140         return;
 141
 142     RefPtrWillBeRawPtr<PositionOptions> positionOptions = createPositionOptions(info[2], info.GetIsolate(), succeeded);
 143     if (!succeeded)
 144         return;
 145     ASSERT(positionOptions);
 146
 147     Geolocation* geolocation = V8Geolocation::toNative(info.Holder());
 148     geolocation->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
 149 }
 150
 151 void V8Geolocation::watchPositionMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 152 {
 153     bool succeeded = false;
 154
 155     OwnPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<V8PositionCallback>(info[0], succeeded, info.GetIsolate());
 156     if (!succeeded)
 157         return;
 158     ASSERT(positionCallback);
 159
 160     // Argument is optional (hence undefined is allowed), and null is allowed.
 161     OwnPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<V8PositionErrorCallback>(info[1], succeeded, info.GetIsolate(), CallbackAllowUndefined | CallbackAllowNull);
 162     if (!succeeded)
 163         return;
 164
 165     RefPtrWillBeRawPtr<PositionOptions> positionOptions = createPositionOptions(info[2], info.GetIsolate(), succeeded);
 166     if (!succeeded)
 167         return;
 168     ASSERT(positionOptions);
 169
 170     Geolocation* geolocation = V8Geolocation::toNative(info.Holder());
 171     int watchId = geolocation->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
 172     v8SetReturnValue(info, watchId);
 173 }
 174
 175 } // namespace WebCore