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 "JSDOMWindow.h"
35#include "JSDictionary.h"
36#include "JSPositionCallback.h"
37#include "JSPositionErrorCallback.h"
38#include "PositionOptions.h"
39
40using namespace JSC;
41
42namespace WebCore {
43
44// JSDictionary helper functions
45
46static void setEnableHighAccuracy(PositionOptions* options, const bool& enableHighAccuracy)
47{
48    options->setEnableHighAccuracy(enableHighAccuracy);
49}
50
51static void setTimeout(PositionOptions* options, const double& timeout)
52{
53    // If the value is positive infinity, there's nothing to do.
54    if (!(std::isinf(timeout) && (timeout > 0))) {
55        // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
56        options->setTimeout(std::max<int>(0, timeout));
57    }
58}
59
60static void setMaximumAge(PositionOptions* options, const double& maximumAge)
61{
62    if (std::isinf(maximumAge) && (maximumAge > 0)) {
63        // If the value is positive infinity, clear maximumAge.
64        options->clearMaximumAge();
65    } else {
66        // Wrap to int32 and force non-negative to match behavior of window.setTimeout.
67        options->setMaximumAge(std::max<int>(0, maximumAge));
68    }
69}
70
71
72static 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    // Create the dictionary wrapper from the initializer object.
87    JSDictionary dictionary(exec, object);
88
89    if (!dictionary.tryGetProperty("enableHighAccuracy", options.get(), setEnableHighAccuracy))
90        return 0;
91    if (!dictionary.tryGetProperty("timeout", options.get(), setTimeout))
92        return 0;
93    if (!dictionary.tryGetProperty("maximumAge", options.get(), setMaximumAge))
94        return 0;
95
96    return options.release();
97}
98
99JSValue JSGeolocation::getCurrentPosition(ExecState* exec)
100{
101    // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
102
103    RefPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<JSPositionCallback>(exec, globalObject(), exec->argument(0));
104    if (exec->hadException())
105        return jsUndefined();
106    ASSERT(positionCallback);
107
108    RefPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<JSPositionErrorCallback>(exec, globalObject(), exec->argument(1), CallbackAllowUndefined | CallbackAllowNull);
109    if (exec->hadException())
110        return jsUndefined();
111
112    RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, exec->argument(2));
113    if (exec->hadException())
114        return jsUndefined();
115    ASSERT(positionOptions);
116
117    m_impl->getCurrentPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
118    return jsUndefined();
119}
120
121JSValue JSGeolocation::watchPosition(ExecState* exec)
122{
123    // Arguments: PositionCallback, (optional)PositionErrorCallback, (optional)PositionOptions
124
125    RefPtr<PositionCallback> positionCallback = createFunctionOnlyCallback<JSPositionCallback>(exec, globalObject(), exec->argument(0));
126    if (exec->hadException())
127        return jsUndefined();
128    ASSERT(positionCallback);
129
130    RefPtr<PositionErrorCallback> positionErrorCallback = createFunctionOnlyCallback<JSPositionErrorCallback>(exec, globalObject(), exec->argument(1), CallbackAllowUndefined | CallbackAllowNull);
131    if (exec->hadException())
132        return jsUndefined();
133
134    RefPtr<PositionOptions> positionOptions = createPositionOptions(exec, exec->argument(2));
135    if (exec->hadException())
136        return jsUndefined();
137    ASSERT(positionOptions);
138
139    int watchID = m_impl->watchPosition(positionCallback.release(), positionErrorCallback.release(), positionOptions.release());
140    return jsNumber(watchID);
141}
142
143} // namespace WebCore
144
145#endif // ENABLE(GEOLOCATION)
146