1 /*
2 * Copyright (C) 2010 Google 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 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "IDBBindingUtilities.h"
28
29 #if ENABLE(INDEXED_DATABASE)
30
31 #include "IDBDatabaseException.h"
32 #include "IDBKey.h"
33 #include "IDBKeyPath.h"
34 #include "SerializedScriptValue.h"
35 #include "V8Binding.h"
36 #include "V8IDBKey.h"
37 #include <wtf/Vector.h>
38
39 namespace WebCore {
40
createIDBKeyFromValue(v8::Handle<v8::Value> value)41 PassRefPtr<IDBKey> createIDBKeyFromValue(v8::Handle<v8::Value> value)
42 {
43 if (value->IsNull())
44 return IDBKey::createNull();
45 if (value->IsNumber())
46 return IDBKey::createNumber(value->NumberValue());
47 if (value->IsString())
48 return IDBKey::createString(v8ValueToWebCoreString(value));
49 if (value->IsDate())
50 return IDBKey::createDate(value->NumberValue());
51
52 return 0; // Signals type error.
53 }
54
55 namespace {
56
57 template<typename T>
getValueFrom(T indexOrName,v8::Handle<v8::Value> & v8Value)58 bool getValueFrom(T indexOrName, v8::Handle<v8::Value>& v8Value)
59 {
60 v8::Local<v8::Object> object = v8Value->ToObject();
61 if (!object->Has(indexOrName))
62 return false;
63 v8Value = object->Get(indexOrName);
64 return true;
65 }
66
67 template<typename T>
setValue(v8::Handle<v8::Value> & v8Object,T indexOrName,const v8::Handle<v8::Value> & v8Value)68 bool setValue(v8::Handle<v8::Value>& v8Object, T indexOrName, const v8::Handle<v8::Value>& v8Value)
69 {
70 v8::Local<v8::Object> object = v8Object->ToObject();
71 ASSERT(!object->Has(indexOrName));
72 return object->Set(indexOrName, v8Value);
73 }
74
get(v8::Handle<v8::Value> & object,const IDBKeyPathElement & keyPathElement)75 bool get(v8::Handle<v8::Value>& object, const IDBKeyPathElement& keyPathElement)
76 {
77 switch (keyPathElement.type) {
78 case IDBKeyPathElement::IsIndexed:
79 return object->IsArray() && getValueFrom(keyPathElement.index, object);
80 case IDBKeyPathElement::IsNamed:
81 return object->IsObject() && getValueFrom(v8String(keyPathElement.identifier), object);
82 default:
83 ASSERT_NOT_REACHED();
84 }
85 return false;
86 }
87
set(v8::Handle<v8::Value> & object,const IDBKeyPathElement & keyPathElement,const v8::Handle<v8::Value> & v8Value)88 bool set(v8::Handle<v8::Value>& object, const IDBKeyPathElement& keyPathElement, const v8::Handle<v8::Value>& v8Value)
89 {
90 switch (keyPathElement.type) {
91 case IDBKeyPathElement::IsIndexed:
92 return object->IsArray() && setValue(object, keyPathElement.index, v8Value);
93 case IDBKeyPathElement::IsNamed:
94 return object->IsObject() && setValue(object, v8String(keyPathElement.identifier), v8Value);
95 default:
96 ASSERT_NOT_REACHED();
97 }
98 return false;
99 }
100
101 class LocalContext {
102 public:
LocalContext()103 LocalContext()
104 : m_context(v8::Context::New())
105 {
106 m_context->Enter();
107 }
108
~LocalContext()109 ~LocalContext()
110 {
111 m_context->Exit();
112 m_context.Dispose();
113 }
114
115 private:
116 v8::HandleScope m_scope;
117 v8::Persistent<v8::Context> m_context;
118 };
119
getNthValueOnKeyPath(v8::Handle<v8::Value> & rootValue,const Vector<IDBKeyPathElement> & keyPathElements,size_t index)120 v8::Handle<v8::Value> getNthValueOnKeyPath(v8::Handle<v8::Value>& rootValue, const Vector<IDBKeyPathElement>& keyPathElements, size_t index)
121 {
122 v8::Handle<v8::Value> currentValue(rootValue);
123
124 ASSERT(index <= keyPathElements.size());
125 for (size_t i = 0; i < index; ++i) {
126 if (!get(currentValue, keyPathElements[i]))
127 return v8::Handle<v8::Value>();
128 }
129
130 return currentValue;
131 }
132
133 } // anonymous namespace
134
createIDBKeyFromSerializedValueAndKeyPath(PassRefPtr<SerializedScriptValue> value,const Vector<IDBKeyPathElement> & keyPath)135 PassRefPtr<IDBKey> createIDBKeyFromSerializedValueAndKeyPath(PassRefPtr<SerializedScriptValue> value, const Vector<IDBKeyPathElement>& keyPath)
136 {
137 LocalContext localContext;
138 v8::Handle<v8::Value> v8Value(value->deserialize());
139 v8::Handle<v8::Value> v8Key(getNthValueOnKeyPath(v8Value, keyPath, keyPath.size()));
140 if (v8Key.IsEmpty())
141 return 0;
142 return createIDBKeyFromValue(v8Key);
143 }
144
injectIDBKeyIntoSerializedValue(PassRefPtr<IDBKey> key,PassRefPtr<SerializedScriptValue> value,const Vector<IDBKeyPathElement> & keyPath)145 PassRefPtr<SerializedScriptValue> injectIDBKeyIntoSerializedValue(PassRefPtr<IDBKey> key, PassRefPtr<SerializedScriptValue> value, const Vector<IDBKeyPathElement>& keyPath)
146 {
147 LocalContext localContext;
148 if (!keyPath.size())
149 return 0;
150
151 v8::Handle<v8::Value> v8Value(value->deserialize());
152 v8::Handle<v8::Value> parent(getNthValueOnKeyPath(v8Value, keyPath, keyPath.size() - 1));
153 if (parent.IsEmpty())
154 return 0;
155
156 if (!set(parent, keyPath.last(), toV8(key.get())))
157 return 0;
158
159 return SerializedScriptValue::create(v8Value);
160 }
161
162 } // namespace WebCore
163
164 #endif
165