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
|
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// FXJS_V8 is a layer that makes it easier to define native objects in V8, but
// has no knowledge of PDF-specific native objects. It could in theory be used
// to implement other sets of native objects.
// PDFium code should include this file rather than including V8 headers
// directly.
#ifndef FXJS_FXJS_V8_H_
#define FXJS_FXJS_V8_H_
#include <map>
#include <memory>
#include <vector>
#include "core/fxcrt/fx_string.h"
#include "fxjs/cjs_v8.h"
#include "v8/include/v8-util.h"
#include "v8/include/v8.h"
#ifdef PDF_ENABLE_XFA
// FXJS_V8 doesn't interpret this class, it is just passed along to XFA.
class CFXJSE_RuntimeData;
#endif // PDF_ENABLE_XFA
class CFXJS_ObjDefinition;
// FXJS_V8 places no restrictions on this class; it merely passes it
// on to caller-provided methods.
class IJS_EventContext; // A description of the event that caused JS execution.
enum FXJSOBJTYPE {
FXJSOBJTYPE_DYNAMIC = 0, // Created by native method and returned to JS.
FXJSOBJTYPE_STATIC, // Created by init and hung off of global object.
FXJSOBJTYPE_GLOBAL, // The global object itself (may only appear once).
};
struct FXJSErr {
const wchar_t* message;
const wchar_t* srcline;
unsigned linnum;
};
// Global weak map to save dynamic objects.
class V8TemplateMapTraits : public v8::StdMapTraits<void*, v8::Object> {
public:
typedef v8::GlobalValueMap<void*, v8::Object, V8TemplateMapTraits> MapType;
typedef void WeakCallbackDataType;
static WeakCallbackDataType*
WeakCallbackParameter(MapType* map, void* key, v8::Local<v8::Object> value) {
return key;
}
static MapType* MapFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>&);
static void* KeyFromWeakCallbackInfo(
const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {
return data.GetParameter();
}
static const v8::PersistentContainerCallbackType kCallbackType =
v8::kWeakWithInternalFields;
static void DisposeWeak(
const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {}
static void OnWeakCallback(
const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {}
static void Dispose(v8::Isolate* isolate,
v8::Global<v8::Object> value,
void* key);
static void DisposeCallbackData(WeakCallbackDataType* callbackData) {}
};
class V8TemplateMap {
public:
typedef v8::GlobalValueMap<void*, v8::Object, V8TemplateMapTraits> MapType;
explicit V8TemplateMap(v8::Isolate* isolate);
~V8TemplateMap();
void set(void* key, v8::Local<v8::Object> handle);
friend class V8TemplateMapTraits;
private:
MapType m_map;
};
class FXJS_PerIsolateData {
public:
~FXJS_PerIsolateData();
static void SetUp(v8::Isolate* pIsolate);
static FXJS_PerIsolateData* Get(v8::Isolate* pIsolate);
std::vector<std::unique_ptr<CFXJS_ObjDefinition>> m_ObjectDefnArray;
#ifdef PDF_ENABLE_XFA
std::unique_ptr<CFXJSE_RuntimeData> m_pFXJSERuntimeData;
#endif // PDF_ENABLE_XFA
std::unique_ptr<V8TemplateMap> m_pDynamicObjsMap;
protected:
explicit FXJS_PerIsolateData(v8::Isolate* pIsolate);
};
class FXJS_ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
static const size_t kMaxAllowedBytes = 0x10000000;
void* Allocate(size_t length) override;
void* AllocateUninitialized(size_t length) override;
void Free(void* data, size_t length) override;
};
void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate);
void FXJS_Release();
// Gets the global isolate set by FXJS_Initialize(), or makes a new one each
// time if there is no such isolate. Returns true if a new isolate had to be
// created.
bool FXJS_GetIsolate(v8::Isolate** pResultIsolate);
// Get the global isolate's ref count.
size_t FXJS_GlobalIsolateRefCount();
class CFXJS_Engine : public CJS_V8 {
public:
explicit CFXJS_Engine(v8::Isolate* pIsolate);
~CFXJS_Engine() override;
using Constructor = void (*)(CFXJS_Engine* pEngine,
v8::Local<v8::Object> obj);
using Destructor = void (*)(CFXJS_Engine* pEngine, v8::Local<v8::Object> obj);
static CFXJS_Engine* EngineFromIsolateCurrentContext(v8::Isolate* pIsolate);
static CFXJS_Engine* EngineFromContext(v8::Local<v8::Context> pContext);
static void SetEngineInContext(CFXJS_Engine* pEngine,
v8::Local<v8::Context> pContext);
static int GetObjDefnID(v8::Local<v8::Object> pObj);
// Always returns a valid, newly-created objDefnID.
int DefineObj(const char* sObjName,
FXJSOBJTYPE eObjType,
Constructor pConstructor,
Destructor pDestructor);
void DefineObjMethod(int nObjDefnID,
const char* sMethodName,
v8::FunctionCallback pMethodCall);
void DefineObjProperty(int nObjDefnID,
const char* sPropName,
v8::AccessorGetterCallback pPropGet,
v8::AccessorSetterCallback pPropPut);
void DefineObjAllProperties(int nObjDefnID,
v8::NamedPropertyQueryCallback pPropQurey,
v8::NamedPropertyGetterCallback pPropGet,
v8::NamedPropertySetterCallback pPropPut,
v8::NamedPropertyDeleterCallback pPropDel);
void DefineObjConst(int nObjDefnID,
const char* sConstName,
v8::Local<v8::Value> pDefault);
void DefineGlobalMethod(const char* sMethodName,
v8::FunctionCallback pMethodCall);
void DefineGlobalConst(const wchar_t* sConstName,
v8::FunctionCallback pConstGetter);
// Called after FXJS_Define* calls made.
void InitializeEngine();
void ReleaseEngine();
// Called after FXJS_InitializeEngine call made.
int Execute(const WideString& script, FXJSErr* perror);
v8::Local<v8::Object> GetThisObj();
v8::Local<v8::Object> NewFxDynamicObj(int nObjDefnID, bool bStatic = false);
// Native object binding.
void SetObjectPrivate(v8::Local<v8::Object> pObj, void* p);
void* GetObjectPrivate(v8::Local<v8::Object> pObj);
static void FreeObjectPrivate(void* p);
static void FreeObjectPrivate(v8::Local<v8::Object> pObj);
void Error(const WideString& message);
v8::Local<v8::Context> GetV8Context() {
return v8::Local<v8::Context>::New(GetIsolate(), m_V8Context);
}
protected:
CFXJS_Engine();
private:
v8::Global<v8::Context> m_V8Context;
std::vector<v8::Global<v8::Object>*> m_StaticObjects;
};
#endif // FXJS_FXJS_V8_H_
|
