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      1 /*
      2  * Copyright (C) 2008 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  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. 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 APPLE INC. ``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 APPLE INC. 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 "JSGeolocation.h"
     28 
     29 #include "DOMWindow.h"
     30 #include "ExceptionCode.h"
     31 #include "Geolocation.h"
     32 #include "GeolocationService.h"
     33 #include "JSCustomPositionCallback.h"
     34 #include "JSCustomPositionErrorCallback.h"
     35 #include "JSDOMWindow.h"
     36 #include "PositionOptions.h"
     37 #include <runtime/InternalFunction.h>
     38 
     39 using namespace JSC;
     40 using namespace std;
     41 
     42 namespace WebCore {
     43 
     44 static PassRefPtr<PositionCallback> createPositionCallback(ExecState* exec, JSDOMGlobalObject* globalObject, JSValue value)
     45 {
     46     // The spec specifies 'FunctionOnly' for this object.
     47     if (!value.inherits(&InternalFunction::info)) {
     48         setDOMException(exec, TYPE_MISMATCH_ERR);
     49         return 0;
     50     }
     51 
     52     JSObject* object = asObject(value);
     53     return JSCustomPositionCallback::create(object, globalObject);
     54 }
     55 
     56 static PassRefPtr<PositionErrorCallback> createPositionErrorCallback(ExecState* exec, JSDOMGlobalObject* globalObject, JSValue value)
     57 {
     58     // Argument is optional (hence undefined is allowed), and null is allowed.
     59     if (value.isUndefinedOrNull())
     60         return 0;
     61 
     62     // The spec specifies 'FunctionOnly' for this object.
     63     if (!value.inherits(&InternalFunction::info)) {
     64         setDOMException(exec, TYPE_MISMATCH_ERR);
     65         return 0;
     66     }
     67 
     68     JSObject* object = asObject(value);
     69     return JSCustomPositionErrorCallback::create(object, globalObject);
     70 }
     71 
     72 static PassRefPtr<PositionOptions> createPositionOptions(ExecState* exec, JSValue value)
     73 {
     74     // Create default options.
     75     RefPtr<PositionOptions> options = PositionOptions::create();
     76 
     77     // Argument is optional (hence undefined is allowed), and null is allowed.
     78     if (value.isUndefinedOrNull()) {
     79         // Use default options.
     80         return options.release();
     81     }
     82 
     83     // Given the above test, this will always yield an object.
     84     JSObject* object = value.toObject(exec);
     85 
     86     // For all three properties, we apply the following ...
     87     // - If the getter or the property's valueOf method throws an exception, we
     88     //   quit so as not to risk overwriting the exception.
     89     // - If the value is absent or undefined, we don't override the default.
     90     JSValue enableHighAccuracyValue = object->get(exec, Identifier(exec, "enableHighAccuracy"));
     91     if (exec->hadException())
     92         return 0;
     93     if (!enableHighAccuracyValue.isUndefined()) {
     94         options->setEnableHighAccuracy(enableHighAccuracyValue.toBoolean(exec));
     95         if (exec->hadException())
     96             return 0;
     97     }
     98 
     99     JSValue timeoutValue = object->get(exec, Identifier(exec, "timeout"));
    100     if (exec->hadException())
    101         return 0;
    102     if (!timeoutValue.isUndefined()) {
    103         double timeoutNumber = timeoutValue.toNumber(exec);
    104         if (exec->hadException())
    105             return 0;
    106         // If the value is positive infinity, there's nothing to do.
    107         if (!(isinf(timeoutNumber) && (timeoutNumber > 0))) {
    108             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
    109             options->setTimeout(max(0, timeoutValue.toInt32(exec)));
    110             if (exec->hadException())
    111                 return 0;
    112         }
    113     }
    114 
    115     JSValue maximumAgeValue = object->get(exec, Identifier(exec, "maximumAge"));
    116     if (exec->hadException())
    117         return 0;
    118     if (!maximumAgeValue.isUndefined()) {
    119         double maximumAgeNumber = maximumAgeValue.toNumber(exec);
    120         if (exec->hadException())
    121             return 0;
    122         if (isinf(maximumAgeNumber) && (maximumAgeNumber > 0)) {
    123             // If the value is positive infinity, clear maximumAge.
    124             options->clearMaximumAge();
    125         } else {
    126             // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
    127             options->setMaximumAge(max(0, maximumAgeValue.toInt32(exec)));
    128             if (exec->hadException())
    129                 return 0;
    130         }
    131     }
    132 
    133     return options.release();
    134 }
    135 
    136 JSValue JSGeolocation::getCurrentPosition(ExecState* exec, const ArgList& args)
    137 {
    138     // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
    139 
    140     RefPtr<PositionCallback> positionCallback = createPositionCallback(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), args.at(0));
    141     if (exec->hadException())
    142         return jsUndefined();
    143     ASSERT(positionCallback);
    144 
    145     RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), args.at(1));
    146     if (exec->hadException())
    147         return jsUndefined();
    148 
    149     RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, args.at(2));
    150     if (exec->hadException())
    151         return jsUndefined();
    152     ASSERT(positionOptions);
    153 
    154     m_impl->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
    155     return jsUndefined();
    156 }
    157 
    158 JSValue JSGeolocation::watchPosition(ExecState* exec, const ArgList& args)
    159 {
    160     // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
    161 
    162     RefPtr<PositionCallback> positionCallback = createPositionCallback(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), args.at(0));
    163     if (exec->hadException())
    164         return jsUndefined();
    165     ASSERT(positionCallback);
    166 
    167     RefPtr<PositionErrorCallback> positionErrorCallback = createPositionErrorCallback(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), args.at(1));
    168     if (exec->hadException())
    169         return jsUndefined();
    170 
    171     RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, args.at(2));
    172     if (exec->hadException())
    173         return jsUndefined();
    174     ASSERT(positionOptions);
    175 
    176     int watchID = m_impl->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
    177     return jsNumber(exec, watchID);
    178 }
    179 
    180 } // namespace WebCore
    181