1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef V8PerContextData_h
#define V8PerContextData_h
#include "bindings/v8/CustomElementBinding.h"
#include "bindings/v8/ScopedPersistent.h"
#include "bindings/v8/UnsafePersistent.h"
#include "bindings/v8/V8DOMActivityLogger.h"
#include "bindings/v8/WrapperTypeInfo.h"
#include "gin/public/context_holder.h"
#include "gin/public/gin_embedders.h"
#include <v8.h>
#include "wtf/HashMap.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/Vector.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/AtomicStringHash.h"
namespace WebCore {
class CustomElementDefinition;
class DOMWrapperWorld;
class V8PerContextData;
struct V8NPObject;
typedef WTF::Vector<V8NPObject*> V8NPObjectVector;
typedef WTF::HashMap<int, V8NPObjectVector> V8NPObjectMap;
enum V8ContextEmbedderDataField {
v8ContextDebugIdIndex = static_cast<int>(gin::kDebugIdIndex),
v8ContextPerContextDataIndex = static_cast<int>(gin::kPerContextDataStartIndex + gin::kEmbedderBlink),
};
class V8PerContextDataHolder {
WTF_MAKE_NONCOPYABLE(V8PerContextDataHolder);
public:
static void install(v8::Handle<v8::Context> context)
{
new V8PerContextDataHolder(context);
}
static V8PerContextDataHolder* from(v8::Handle<v8::Context> context)
{
return static_cast<V8PerContextDataHolder*>(context->GetAlignedPointerFromEmbedderData(v8ContextPerContextDataIndex));
}
V8PerContextData* perContextData() const { return m_perContextData; }
void setPerContextData(V8PerContextData* data) { m_perContextData = data; }
DOMWrapperWorld* isolatedWorld() const { return m_isolatedWorld; }
void setIsolatedWorld(DOMWrapperWorld* world) { m_isolatedWorld = world; }
private:
explicit V8PerContextDataHolder(v8::Handle<v8::Context> context)
: m_context(v8::Isolate::GetCurrent(), context)
, m_perContextData(0)
, m_isolatedWorld(0)
{
m_context.SetWeak(this, &V8PerContextDataHolder::weakCallback);
context->SetAlignedPointerInEmbedderData(v8ContextPerContextDataIndex, this);
}
~V8PerContextDataHolder() {}
static void weakCallback(const v8::WeakCallbackData<v8::Context, V8PerContextDataHolder>& data)
{
data.GetValue()->SetAlignedPointerInEmbedderData(v8ContextPerContextDataIndex, 0);
data.GetParameter()->m_context.Reset();
delete data.GetParameter();
}
v8::Persistent<v8::Context> m_context;
V8PerContextData* m_perContextData;
DOMWrapperWorld* m_isolatedWorld;
};
class V8PerContextData {
public:
static PassOwnPtr<V8PerContextData> create(v8::Handle<v8::Context> context)
{
return adoptPtr(new V8PerContextData(context));
}
~V8PerContextData()
{
dispose();
}
bool init();
static V8PerContextData* from(v8::Handle<v8::Context> context)
{
return V8PerContextDataHolder::from(context)->perContextData();
}
// To create JS Wrapper objects, we create a cache of a 'boiler plate'
// object, and then simply Clone that object each time we need a new one.
// This is faster than going through the full object creation process.
v8::Local<v8::Object> createWrapperFromCache(const WrapperTypeInfo* type)
{
UnsafePersistent<v8::Object> boilerplate = m_wrapperBoilerplates.get(type);
return !boilerplate.isEmpty() ? boilerplate.newLocal(v8::Isolate::GetCurrent())->Clone() : createWrapperFromCacheSlowCase(type);
}
v8::Local<v8::Function> constructorForType(const WrapperTypeInfo* type)
{
UnsafePersistent<v8::Function> function = m_constructorMap.get(type);
if (!function.isEmpty())
return function.newLocal(v8::Isolate::GetCurrent());
return constructorForTypeSlowCase(type);
}
v8::Local<v8::Object> prototypeForType(const WrapperTypeInfo*);
V8NPObjectMap* v8NPObjectMap()
{
return &m_v8NPObjectMap;
}
V8DOMActivityLogger* activityLogger()
{
return m_activityLogger;
}
void setActivityLogger(V8DOMActivityLogger* logger)
{
m_activityLogger = logger;
}
void addCustomElementBinding(CustomElementDefinition*, PassOwnPtr<CustomElementBinding>);
void clearCustomElementBinding(CustomElementDefinition*);
CustomElementBinding* customElementBinding(CustomElementDefinition*);
private:
explicit V8PerContextData(v8::Handle<v8::Context> context)
: m_activityLogger(0)
, m_isolate(v8::Isolate::GetCurrent())
, m_context(m_isolate, context)
, m_customElementBindings(adoptPtr(new CustomElementBindingMap()))
{
}
void dispose();
v8::Local<v8::Object> createWrapperFromCacheSlowCase(const WrapperTypeInfo*);
v8::Local<v8::Function> constructorForTypeSlowCase(const WrapperTypeInfo*);
// For each possible type of wrapper, we keep a boilerplate object.
// The boilerplate is used to create additional wrappers of the same type.
typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Object> > WrapperBoilerplateMap;
WrapperBoilerplateMap m_wrapperBoilerplates;
typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Function> > ConstructorMap;
ConstructorMap m_constructorMap;
V8NPObjectMap m_v8NPObjectMap;
// We cache a pointer to the V8DOMActivityLogger associated with the world
// corresponding to this context. The ownership of the pointer is retained
// by the DOMActivityLoggerMap in DOMWrapperWorld.
V8DOMActivityLogger* m_activityLogger;
v8::Isolate* m_isolate;
v8::Persistent<v8::Context> m_context;
ScopedPersistent<v8::Value> m_errorPrototype;
typedef WTF::HashMap<CustomElementDefinition*, OwnPtr<CustomElementBinding> > CustomElementBindingMap;
OwnPtr<CustomElementBindingMap> m_customElementBindings;
};
class V8PerContextDebugData {
public:
static bool setContextDebugData(v8::Handle<v8::Context>, const char* worldName, int debugId);
static int contextDebugId(v8::Handle<v8::Context>);
};
} // namespace WebCore
#endif // V8PerContextData_h
|
