1/*
2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
3 * Copyright (c) 2011 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1.  Redistributions of source code must retain the above copyright
10 *     notice, this list of conditions and the following disclaimer.
11 * 2.  Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
15 *     its contributors may be used to endorse or promote products derived
16 *     from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include "config.h"
31#include "ScriptValue.h"
32
33#include "InspectorValues.h"
34#include "JSDOMBinding.h"
35#include "SerializedScriptValue.h"
36
37#include <JavaScriptCore/APICast.h>
38#include <JavaScriptCore/JSValueRef.h>
39
40#include <heap/Strong.h>
41#include <runtime/JSLock.h>
42
43using namespace JSC;
44
45namespace WebCore {
46
47bool ScriptValue::getString(ScriptState* scriptState, String& result) const
48{
49    if (!m_value)
50        return false;
51    JSLockHolder lock(scriptState);
52    if (!m_value.get().getString(scriptState, result))
53        return false;
54    return true;
55}
56
57String ScriptValue::toString(ScriptState* scriptState) const
58{
59    String result = m_value.get().toString(scriptState)->value(scriptState);
60    // Handle the case where an exception is thrown as part of invoking toString on the object.
61    if (scriptState->hadException())
62        scriptState->clearException();
63    return result;
64}
65
66bool ScriptValue::isEqual(ScriptState* scriptState, const ScriptValue& anotherValue) const
67{
68    if (hasNoValue())
69        return anotherValue.hasNoValue();
70
71    return JSValueIsEqual(toRef(scriptState), toRef(scriptState, jsValue()), toRef(scriptState, anotherValue.jsValue()), 0);
72}
73
74bool ScriptValue::isNull() const
75{
76    if (!m_value)
77        return false;
78    return m_value.get().isNull();
79}
80
81bool ScriptValue::isUndefined() const
82{
83    if (!m_value)
84        return false;
85    return m_value.get().isUndefined();
86}
87
88bool ScriptValue::isObject() const
89{
90    if (!m_value)
91        return false;
92    return m_value.get().isObject();
93}
94
95bool ScriptValue::isFunction() const
96{
97    CallData callData;
98    return getCallData(m_value.get(), callData) != CallTypeNone;
99}
100
101PassRefPtr<SerializedScriptValue> ScriptValue::serialize(ScriptState* scriptState, SerializationErrorMode throwExceptions)
102{
103    return SerializedScriptValue::create(scriptState, jsValue(), 0, 0, throwExceptions);
104}
105
106PassRefPtr<SerializedScriptValue> ScriptValue::serialize(ScriptState* scriptState, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, bool& didThrow)
107{
108    RefPtr<SerializedScriptValue> serializedValue = SerializedScriptValue::create(scriptState, jsValue(), messagePorts, arrayBuffers);
109    didThrow = scriptState->hadException();
110    return serializedValue.release();
111}
112
113ScriptValue ScriptValue::deserialize(ScriptState* scriptState, SerializedScriptValue* value, SerializationErrorMode throwExceptions)
114{
115    return ScriptValue(scriptState->vm(), value->deserialize(scriptState, scriptState->lexicalGlobalObject(), 0, throwExceptions));
116}
117
118#if ENABLE(INSPECTOR)
119static PassRefPtr<InspectorValue> jsToInspectorValue(ScriptState* scriptState, JSValue value, int maxDepth)
120{
121    if (!value) {
122        ASSERT_NOT_REACHED();
123        return 0;
124    }
125
126    if (!maxDepth)
127        return 0;
128    maxDepth--;
129
130    if (value.isNull() || value.isUndefined())
131        return InspectorValue::null();
132    if (value.isBoolean())
133        return InspectorBasicValue::create(value.asBoolean());
134    if (value.isNumber())
135        return InspectorBasicValue::create(value.asNumber());
136    if (value.isString()) {
137        String s = value.getString(scriptState);
138        return InspectorString::create(String(s.characters(), s.length()));
139    }
140    if (value.isObject()) {
141        if (isJSArray(value)) {
142            RefPtr<InspectorArray> inspectorArray = InspectorArray::create();
143            JSArray* array = asArray(value);
144            unsigned length = array->length();
145            for (unsigned i = 0; i < length; i++) {
146                JSValue element = array->getIndex(scriptState, i);
147                RefPtr<InspectorValue> elementValue = jsToInspectorValue(scriptState, element, maxDepth);
148                if (!elementValue)
149                    return 0;
150                inspectorArray->pushValue(elementValue);
151            }
152            return inspectorArray;
153        }
154        RefPtr<InspectorObject> inspectorObject = InspectorObject::create();
155        JSObject* object = value.getObject();
156        PropertyNameArray propertyNames(scriptState);
157        object->methodTable()->getOwnPropertyNames(object, scriptState, propertyNames, ExcludeDontEnumProperties);
158        for (size_t i = 0; i < propertyNames.size(); i++) {
159            const Identifier& name =  propertyNames[i];
160            JSValue propertyValue = object->get(scriptState, name);
161            RefPtr<InspectorValue> inspectorValue = jsToInspectorValue(scriptState, propertyValue, maxDepth);
162            if (!inspectorValue)
163                return 0;
164            inspectorObject->setValue(String(name.characters(), name.length()), inspectorValue);
165        }
166        return inspectorObject;
167    }
168    ASSERT_NOT_REACHED();
169    return 0;
170}
171
172PassRefPtr<InspectorValue> ScriptValue::toInspectorValue(ScriptState* scriptState) const
173{
174    JSC::JSLockHolder holder(scriptState);
175    return jsToInspectorValue(scriptState, m_value.get(), InspectorValue::maxDepth);
176}
177#endif // ENABLE(INSPECTOR)
178
179} // namespace WebCore
180