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/cjs_v8.h" 8 9 #ifdef PDF_ENABLE_XFA 10 #include "fxjs/cfxjse_context.h" 11 #include "xfa/fxfa/parser/cxfa_object.h" 12 #endif // PDF_ENABLE_XFA 13 14 CJS_V8::CJS_V8(v8::Isolate* isolate) : m_isolate(isolate) {} 15 16 CJS_V8::~CJS_V8() { 17 m_V8PersistentContext.Reset(); 18 } 19 20 v8::Local<v8::Value> CJS_V8::GetObjectProperty( 21 v8::Local<v8::Object> pObj, 22 const WideString& wsPropertyName) { 23 if (pObj.IsEmpty()) 24 return v8::Local<v8::Value>(); 25 v8::Local<v8::Value> val; 26 if (!pObj->Get(m_isolate->GetCurrentContext(), 27 NewString(wsPropertyName.AsStringView())) 28 .ToLocal(&val)) 29 return v8::Local<v8::Value>(); 30 return val; 31 } 32 33 std::vector<WideString> CJS_V8::GetObjectPropertyNames( 34 v8::Local<v8::Object> pObj) { 35 if (pObj.IsEmpty()) 36 return std::vector<WideString>(); 37 38 v8::Local<v8::Array> val; 39 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 40 if (!pObj->GetPropertyNames(context).ToLocal(&val)) 41 return std::vector<WideString>(); 42 43 std::vector<WideString> result; 44 for (uint32_t i = 0; i < val->Length(); ++i) { 45 result.push_back(ToWideString(val->Get(context, i).ToLocalChecked())); 46 } 47 48 return result; 49 } 50 51 void CJS_V8::PutObjectProperty(v8::Local<v8::Object> pObj, 52 const WideString& wsPropertyName, 53 v8::Local<v8::Value> pPut) { 54 if (pObj.IsEmpty()) 55 return; 56 pObj->Set(m_isolate->GetCurrentContext(), 57 NewString(wsPropertyName.AsStringView()), pPut) 58 .FromJust(); 59 } 60 61 v8::Local<v8::Array> CJS_V8::NewArray() { 62 return v8::Array::New(m_isolate); 63 } 64 65 unsigned CJS_V8::PutArrayElement(v8::Local<v8::Array> pArray, 66 unsigned index, 67 v8::Local<v8::Value> pValue) { 68 if (pArray.IsEmpty()) 69 return 0; 70 if (pArray->Set(m_isolate->GetCurrentContext(), index, pValue).IsNothing()) 71 return 0; 72 return 1; 73 } 74 75 v8::Local<v8::Value> CJS_V8::GetArrayElement(v8::Local<v8::Array> pArray, 76 unsigned index) { 77 if (pArray.IsEmpty()) 78 return v8::Local<v8::Value>(); 79 v8::Local<v8::Value> val; 80 if (!pArray->Get(m_isolate->GetCurrentContext(), index).ToLocal(&val)) 81 return v8::Local<v8::Value>(); 82 return val; 83 } 84 85 unsigned CJS_V8::GetArrayLength(v8::Local<v8::Array> pArray) { 86 if (pArray.IsEmpty()) 87 return 0; 88 return pArray->Length(); 89 } 90 91 v8::Local<v8::Context> CJS_V8::NewLocalContext() { 92 return v8::Local<v8::Context>::New(m_isolate, m_V8PersistentContext); 93 } 94 95 v8::Local<v8::Context> CJS_V8::GetPersistentContext() { 96 return m_V8PersistentContext.Get(m_isolate); 97 } 98 99 v8::Local<v8::Number> CJS_V8::NewNumber(int number) { 100 return v8::Int32::New(m_isolate, number); 101 } 102 103 v8::Local<v8::Number> CJS_V8::NewNumber(double number) { 104 return v8::Number::New(m_isolate, number); 105 } 106 107 v8::Local<v8::Number> CJS_V8::NewNumber(float number) { 108 return v8::Number::New(m_isolate, (float)number); 109 } 110 111 v8::Local<v8::Boolean> CJS_V8::NewBoolean(bool b) { 112 return v8::Boolean::New(m_isolate, b); 113 } 114 115 v8::Local<v8::String> CJS_V8::NewString(const ByteStringView& str) { 116 v8::Isolate* pIsolate = m_isolate ? m_isolate : v8::Isolate::GetCurrent(); 117 return v8::String::NewFromUtf8(pIsolate, str.unterminated_c_str(), 118 v8::NewStringType::kNormal, str.GetLength()) 119 .ToLocalChecked(); 120 } 121 122 v8::Local<v8::String> CJS_V8::NewString(const WideStringView& str) { 123 // Conversion from pdfium's wchar_t wide-strings to v8's uint16_t 124 // wide-strings isn't handled by v8, so use UTF8 as a common 125 // intermediate format. 126 return NewString(FX_UTF8Encode(str).AsStringView()); 127 } 128 129 v8::Local<v8::Value> CJS_V8::NewNull() { 130 return v8::Null(m_isolate); 131 } 132 133 v8::Local<v8::Value> CJS_V8::NewUndefined() { 134 return v8::Undefined(m_isolate); 135 } 136 137 v8::Local<v8::Date> CJS_V8::NewDate(double d) { 138 return v8::Date::New(m_isolate->GetCurrentContext(), d) 139 .ToLocalChecked() 140 .As<v8::Date>(); 141 } 142 143 int CJS_V8::ToInt32(v8::Local<v8::Value> pValue) { 144 if (pValue.IsEmpty()) 145 return 0; 146 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 147 v8::MaybeLocal<v8::Int32> maybe_int32 = pValue->ToInt32(context); 148 if (maybe_int32.IsEmpty()) 149 return 0; 150 return maybe_int32.ToLocalChecked()->Value(); 151 } 152 153 bool CJS_V8::ToBoolean(v8::Local<v8::Value> pValue) { 154 if (pValue.IsEmpty()) 155 return false; 156 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 157 v8::MaybeLocal<v8::Boolean> maybe_boolean = pValue->ToBoolean(context); 158 if (maybe_boolean.IsEmpty()) 159 return false; 160 return maybe_boolean.ToLocalChecked()->Value(); 161 } 162 163 double CJS_V8::ToDouble(v8::Local<v8::Value> pValue) { 164 if (pValue.IsEmpty()) 165 return 0.0; 166 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 167 v8::MaybeLocal<v8::Number> maybe_number = pValue->ToNumber(context); 168 if (maybe_number.IsEmpty()) 169 return 0.0; 170 return maybe_number.ToLocalChecked()->Value(); 171 } 172 173 WideString CJS_V8::ToWideString(v8::Local<v8::Value> pValue) { 174 if (pValue.IsEmpty()) 175 return WideString(); 176 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 177 v8::MaybeLocal<v8::String> maybe_string = pValue->ToString(context); 178 if (maybe_string.IsEmpty()) 179 return WideString(); 180 v8::String::Utf8Value s(m_isolate, maybe_string.ToLocalChecked()); 181 return WideString::FromUTF8(ByteStringView(*s, s.length())); 182 } 183 184 ByteString CJS_V8::ToByteString(v8::Local<v8::Value> pValue) { 185 if (pValue.IsEmpty()) 186 return ByteString(); 187 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 188 v8::MaybeLocal<v8::String> maybe_string = pValue->ToString(context); 189 if (maybe_string.IsEmpty()) 190 return ByteString(); 191 v8::String::Utf8Value s(m_isolate, maybe_string.ToLocalChecked()); 192 return ByteString(*s); 193 } 194 195 v8::Local<v8::Object> CJS_V8::ToObject(v8::Local<v8::Value> pValue) { 196 if (pValue.IsEmpty() || !pValue->IsObject()) 197 return v8::Local<v8::Object>(); 198 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 199 return pValue->ToObject(context).ToLocalChecked(); 200 } 201 202 v8::Local<v8::Array> CJS_V8::ToArray(v8::Local<v8::Value> pValue) { 203 if (pValue.IsEmpty() || !pValue->IsArray()) 204 return v8::Local<v8::Array>(); 205 v8::Local<v8::Context> context = m_isolate->GetCurrentContext(); 206 return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked()); 207 } 208 209 void CJS_V8::SetConstArray(const WideString& name, v8::Local<v8::Array> array) { 210 m_ConstArrays[name] = v8::Global<v8::Array>(GetIsolate(), array); 211 } 212 213 v8::Local<v8::Array> CJS_V8::GetConstArray(const WideString& name) { 214 return v8::Local<v8::Array>::New(GetIsolate(), m_ConstArrays[name]); 215 } 216 217 #ifdef PDF_ENABLE_XFA 218 CXFA_Object* CJS_V8::ToXFAObject(v8::Local<v8::Value> obj) { 219 ASSERT(!obj.IsEmpty()); 220 221 if (!obj->IsObject()) 222 return nullptr; 223 224 CFXJSE_HostObject* hostObj = 225 FXJSE_RetrieveObjectBinding(obj.As<v8::Object>(), nullptr); 226 if (!hostObj || hostObj->type() != CFXJSE_HostObject::kXFA) 227 return nullptr; 228 return static_cast<CXFA_Object*>(hostObj); 229 } 230 231 v8::Local<v8::Value> CJS_V8::NewXFAObject( 232 CXFA_Object* obj, 233 v8::Global<v8::FunctionTemplate>& tmpl) { 234 v8::EscapableHandleScope scope(m_isolate); 235 v8::Local<v8::FunctionTemplate> klass = 236 v8::Local<v8::FunctionTemplate>::New(m_isolate, tmpl); 237 v8::Local<v8::Object> object = klass->InstanceTemplate()->NewInstance(); 238 FXJSE_UpdateObjectBinding(object, obj); 239 return scope.Escape(object); 240 } 241 #endif // PDF_ENABLE_XFA 242
