1 // Copyright 2017 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "fxjs/cfx_v8.h"
8
9 #include "core/fxcrt/fx_memory.h"
10 #include "third_party/base/allocator/partition_allocator/partition_alloc.h"
11
CFX_V8(v8::Isolate * isolate)12 CFX_V8::CFX_V8(v8::Isolate* isolate) : m_pIsolate(isolate) {}
13
14 CFX_V8::~CFX_V8() = default;
15
GetObjectProperty(v8::Local<v8::Object> pObj,ByteStringView bsUTF8PropertyName)16 v8::Local<v8::Value> CFX_V8::GetObjectProperty(
17 v8::Local<v8::Object> pObj,
18 ByteStringView bsUTF8PropertyName) {
19 if (pObj.IsEmpty())
20 return v8::Local<v8::Value>();
21 v8::Local<v8::Value> val;
22 if (!pObj->Get(m_pIsolate->GetCurrentContext(), NewString(bsUTF8PropertyName))
23 .ToLocal(&val))
24 return v8::Local<v8::Value>();
25 return val;
26 }
27
GetObjectPropertyNames(v8::Local<v8::Object> pObj)28 std::vector<WideString> CFX_V8::GetObjectPropertyNames(
29 v8::Local<v8::Object> pObj) {
30 if (pObj.IsEmpty())
31 return std::vector<WideString>();
32
33 v8::Local<v8::Array> val;
34 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
35 if (!pObj->GetPropertyNames(context).ToLocal(&val))
36 return std::vector<WideString>();
37
38 std::vector<WideString> result;
39 for (uint32_t i = 0; i < val->Length(); ++i) {
40 result.push_back(ToWideString(val->Get(context, i).ToLocalChecked()));
41 }
42
43 return result;
44 }
45
PutObjectProperty(v8::Local<v8::Object> pObj,ByteStringView bsUTF8PropertyName,v8::Local<v8::Value> pPut)46 bool CFX_V8::PutObjectProperty(v8::Local<v8::Object> pObj,
47 ByteStringView bsUTF8PropertyName,
48 v8::Local<v8::Value> pPut) {
49 ASSERT(!pPut.IsEmpty());
50 if (pObj.IsEmpty())
51 return false;
52
53 v8::Local<v8::String> name = NewString(bsUTF8PropertyName);
54 return pObj->Set(m_pIsolate->GetCurrentContext(), name, pPut).IsJust();
55 }
56
DisposeIsolate()57 void CFX_V8::DisposeIsolate() {
58 if (m_pIsolate)
59 m_pIsolate.Release()->Dispose();
60 }
61
NewArray()62 v8::Local<v8::Array> CFX_V8::NewArray() {
63 return v8::Array::New(GetIsolate());
64 }
65
NewObject()66 v8::Local<v8::Object> CFX_V8::NewObject() {
67 return v8::Object::New(GetIsolate());
68 }
69
PutArrayElement(v8::Local<v8::Array> pArray,unsigned index,v8::Local<v8::Value> pValue)70 bool CFX_V8::PutArrayElement(v8::Local<v8::Array> pArray,
71 unsigned index,
72 v8::Local<v8::Value> pValue) {
73 ASSERT(!pValue.IsEmpty());
74 if (pArray.IsEmpty())
75 return false;
76 return pArray->Set(m_pIsolate->GetCurrentContext(), index, pValue).IsJust();
77 }
78
GetArrayElement(v8::Local<v8::Array> pArray,unsigned index)79 v8::Local<v8::Value> CFX_V8::GetArrayElement(v8::Local<v8::Array> pArray,
80 unsigned index) {
81 if (pArray.IsEmpty())
82 return v8::Local<v8::Value>();
83 v8::Local<v8::Value> val;
84 if (!pArray->Get(m_pIsolate->GetCurrentContext(), index).ToLocal(&val))
85 return v8::Local<v8::Value>();
86 return val;
87 }
88
GetArrayLength(v8::Local<v8::Array> pArray)89 unsigned CFX_V8::GetArrayLength(v8::Local<v8::Array> pArray) {
90 if (pArray.IsEmpty())
91 return 0;
92 return pArray->Length();
93 }
94
NewNumber(int number)95 v8::Local<v8::Number> CFX_V8::NewNumber(int number) {
96 return v8::Int32::New(GetIsolate(), number);
97 }
98
NewNumber(double number)99 v8::Local<v8::Number> CFX_V8::NewNumber(double number) {
100 return v8::Number::New(GetIsolate(), number);
101 }
102
NewNumber(float number)103 v8::Local<v8::Number> CFX_V8::NewNumber(float number) {
104 return v8::Number::New(GetIsolate(), number);
105 }
106
NewBoolean(bool b)107 v8::Local<v8::Boolean> CFX_V8::NewBoolean(bool b) {
108 return v8::Boolean::New(GetIsolate(), b);
109 }
110
NewString(ByteStringView str)111 v8::Local<v8::String> CFX_V8::NewString(ByteStringView str) {
112 v8::Isolate* pIsolate = m_pIsolate ? GetIsolate() : v8::Isolate::GetCurrent();
113 return v8::String::NewFromUtf8(pIsolate, str.unterminated_c_str(),
114 v8::NewStringType::kNormal, str.GetLength())
115 .ToLocalChecked();
116 }
117
NewString(WideStringView str)118 v8::Local<v8::String> CFX_V8::NewString(WideStringView str) {
119 // Conversion from pdfium's wchar_t wide-strings to v8's uint16_t
120 // wide-strings isn't handled by v8, so use UTF8 as a common
121 // intermediate format.
122 return NewString(FX_UTF8Encode(str).AsStringView());
123 }
124
NewNull()125 v8::Local<v8::Value> CFX_V8::NewNull() {
126 return v8::Null(GetIsolate());
127 }
128
NewUndefined()129 v8::Local<v8::Value> CFX_V8::NewUndefined() {
130 return v8::Undefined(GetIsolate());
131 }
132
NewDate(double d)133 v8::Local<v8::Date> CFX_V8::NewDate(double d) {
134 return v8::Date::New(m_pIsolate->GetCurrentContext(), d)
135 .ToLocalChecked()
136 .As<v8::Date>();
137 }
138
ToInt32(v8::Local<v8::Value> pValue)139 int CFX_V8::ToInt32(v8::Local<v8::Value> pValue) {
140 if (pValue.IsEmpty())
141 return 0;
142 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
143 v8::MaybeLocal<v8::Int32> maybe_int32 = pValue->ToInt32(context);
144 if (maybe_int32.IsEmpty())
145 return 0;
146 return maybe_int32.ToLocalChecked()->Value();
147 }
148
ToBoolean(v8::Local<v8::Value> pValue)149 bool CFX_V8::ToBoolean(v8::Local<v8::Value> pValue) {
150 if (pValue.IsEmpty())
151 return false;
152 return pValue->BooleanValue(m_pIsolate.Get());
153 }
154
ToDouble(v8::Local<v8::Value> pValue)155 double CFX_V8::ToDouble(v8::Local<v8::Value> pValue) {
156 if (pValue.IsEmpty())
157 return 0.0;
158 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
159 v8::MaybeLocal<v8::Number> maybe_number = pValue->ToNumber(context);
160 if (maybe_number.IsEmpty())
161 return 0.0;
162 return maybe_number.ToLocalChecked()->Value();
163 }
164
ToWideString(v8::Local<v8::Value> pValue)165 WideString CFX_V8::ToWideString(v8::Local<v8::Value> pValue) {
166 if (pValue.IsEmpty())
167 return WideString();
168 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
169 v8::MaybeLocal<v8::String> maybe_string = pValue->ToString(context);
170 if (maybe_string.IsEmpty())
171 return WideString();
172 v8::String::Utf8Value s(GetIsolate(), maybe_string.ToLocalChecked());
173 return WideString::FromUTF8(ByteStringView(*s, s.length()));
174 }
175
ToByteString(v8::Local<v8::Value> pValue)176 ByteString CFX_V8::ToByteString(v8::Local<v8::Value> pValue) {
177 if (pValue.IsEmpty())
178 return ByteString();
179 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
180 v8::MaybeLocal<v8::String> maybe_string = pValue->ToString(context);
181 if (maybe_string.IsEmpty())
182 return ByteString();
183 v8::String::Utf8Value s(GetIsolate(), maybe_string.ToLocalChecked());
184 return ByteString(*s);
185 }
186
ToObject(v8::Local<v8::Value> pValue)187 v8::Local<v8::Object> CFX_V8::ToObject(v8::Local<v8::Value> pValue) {
188 if (pValue.IsEmpty() || !pValue->IsObject())
189 return v8::Local<v8::Object>();
190 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
191 return pValue->ToObject(context).ToLocalChecked();
192 }
193
ToArray(v8::Local<v8::Value> pValue)194 v8::Local<v8::Array> CFX_V8::ToArray(v8::Local<v8::Value> pValue) {
195 if (pValue.IsEmpty() || !pValue->IsArray())
196 return v8::Local<v8::Array>();
197 v8::Local<v8::Context> context = m_pIsolate->GetCurrentContext();
198 return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
199 }
200
Allocate(size_t length)201 void* CFX_V8ArrayBufferAllocator::Allocate(size_t length) {
202 if (length > kMaxAllowedBytes)
203 return nullptr;
204 return GetArrayBufferPartitionAllocator().root()->AllocFlags(
205 pdfium::base::PartitionAllocZeroFill, length, "CFX_V8ArrayBuffer");
206 }
207
AllocateUninitialized(size_t length)208 void* CFX_V8ArrayBufferAllocator::AllocateUninitialized(size_t length) {
209 if (length > kMaxAllowedBytes)
210 return nullptr;
211 return GetArrayBufferPartitionAllocator().root()->Alloc(length,
212 "CFX_V8ArrayBuffer");
213 }
214
Free(void * data,size_t length)215 void CFX_V8ArrayBufferAllocator::Free(void* data, size_t length) {
216 GetArrayBufferPartitionAllocator().root()->Free(data);
217 }
218