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#if ENABLE(GEOLOCATION)
30
31#include "CallbackFunction.h"
32#include "DOMWindow.h"
33#include "Geolocation.h"
34#include "JSCustomPositionCallback.h"
35#include "JSCustomPositionErrorCallback.h"
36#include "JSDOMWindow.h"
37#include "PositionOptions.h"
38
39#if !ENABLE(CLIENT_BASED_GEOLOCATION)
40#include "GeolocationService.h"
41#endif
42
43using namespace JSC;
44using namespace std;
45
46namespace WebCore {
47
48static PassRefPtr<PositionOptions> createPositionOptions(ExecState* exec, JSValue value)
49{
50    // Create default options.
51    RefPtr<PositionOptions> options = PositionOptions::create();
52
53    // Argument is optional (hence undefined is allowed), and null is allowed.
54    if (value.isUndefinedOrNull()) {
55        // Use default options.
56        return options.release();
57    }
58
59    // Given the above test, this will always yield an object.
60    JSObject* object = value.toObject(exec);
61
62    // For all three properties, we apply the following ...
63    // - If the getter or the property's valueOf method throws an exception, we
64    //   quit so as not to risk overwriting the exception.
65    // - If the value is absent or undefined, we don't override the default.
66    JSValue enableHighAccuracyValue = object->get(exec, Identifier(exec, "enableHighAccuracy"));
67    if (exec->hadException())
68        return 0;
69    if (!enableHighAccuracyValue.isUndefined()) {
70        options->setEnableHighAccuracy(enableHighAccuracyValue.toBoolean(exec));
71        if (exec->hadException())
72            return 0;
73    }
74
75    JSValue timeoutValue = object->get(exec, Identifier(exec, "timeout"));
76    if (exec->hadException())
77        return 0;
78    if (!timeoutValue.isUndefined()) {
79        double timeoutNumber = timeoutValue.toNumber(exec);
80        if (exec->hadException())
81            return 0;
82        // If the value is positive infinity, there's nothing to do.
83        if (!(isinf(timeoutNumber) && (timeoutNumber > 0))) {
84            // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
85            options->setTimeout(max(0, timeoutValue.toInt32(exec)));
86            if (exec->hadException())
87                return 0;
88        }
89    }
90
91    JSValue maximumAgeValue = object->get(exec, Identifier(exec, "maximumAge"));
92    if (exec->hadException())
93        return 0;
94    if (!maximumAgeValue.isUndefined()) {
95        double maximumAgeNumber = maximumAgeValue.toNumber(exec);
96        if (exec->hadException())
97            return 0;
98        if (isinf(maximumAgeNumber) && (maximumAgeNumber > 0)) {
99            // If the value is positive infinity, clear maximumAge.
100            options->clearMaximumAge();
101        } else {
102            // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
103            options->setMaximumAge(max(0, maximumAgeValue.toInt32(exec)));
104            if (exec->hadException())
105                return 0;
106        }
107    }
108
109    return options.release();
110}
111
112JSValue JSGeolocation::getCurrentPosition(ExecState* exec)
113{
114    // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
115
116    RefPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<JSCustomPositionCallback>(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), exec->argument(0));
117    if (exec->hadException())
118        return jsUndefined();
119    ASSERT(positionCallback);
120
121    RefPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<JSCustomPositionErrorCallback>(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), exec->argument(1), CallbackAllowUndefined | CallbackAllowNull);
122    if (exec->hadException())
123        return jsUndefined();
124
125    RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, exec->argument(2));
126    if (exec->hadException())
127        return jsUndefined();
128    ASSERT(positionOptions);
129
130    m_impl->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
131    return jsUndefined();
132}
133
134JSValue JSGeolocation::watchPosition(ExecState* exec)
135{
136    // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
137
138    RefPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<JSCustomPositionCallback>(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), exec->argument(0));
139    if (exec->hadException())
140        return jsUndefined();
141    ASSERT(positionCallback);
142
143    RefPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<JSCustomPositionErrorCallback>(exec, static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), exec->argument(1), CallbackAllowUndefined | CallbackAllowNull);
144    if (exec->hadException())
145        return jsUndefined();
146
147    RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, exec->argument(2));
148    if (exec->hadException())
149        return jsUndefined();
150    ASSERT(positionOptions);
151
152    int watchID = m_impl->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
153    return jsNumber(watchID);
154}
155
156} // namespace WebCore
157
158#endif // ENABLE(GEOLOCATION)
159