/platform/external/webkit/WebCore/bindings/js/JSGeolocationCustom.cpp

  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
 39using namespace JSC;
 40using namespace std;
 41
 42namespace WebCore {
 43
 44static 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
 56static 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
 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    // 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
136JSValue 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
158JSValue 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