Move fpdfsdk/jsapi into fxjs/

This CL moves the fpdfsdk/sjapi code info fxjs/. The "fxjs" library is moved
from being XFA specific to being compiled if V8 is enabled.

The fxjs_v8 files are required when building for XFA (they have XFA defines
in them) and are used in CFXJS_RuntimeData. The cfxjse_* files are only added
if XFA is also enabled.

Review-Url: https://codereview.chromium.org/2144603003

5 files changed, 1230 insertions, 3 deletions

diff --git a/fxjs/DEPS b/fxjs/DEPS
index 18698e4ce4..ccea0b552a 100644
--- a/fxjs/DEPS
+++ b/fxjs/DEPS
@@ -1,6 +1,4 @@
 include_rules = [
   '+core/fxcrt/include',
-  # TODO(dsinclair): Layering violation. FXJSE can't include FPDFSDK.
-  '+fpdfsdk/jsapi/include',
   '+v8/include',
 ]
diff --git a/fxjs/cfxjse_runtimedata.cpp b/fxjs/cfxjse_runtimedata.cpp
index f58f5f852d..b203cb71ac 100644
--- a/fxjs/cfxjse_runtimedata.cpp
+++ b/fxjs/cfxjse_runtimedata.cpp
@@ -6,8 +6,8 @@
 
 #include "fxjs/cfxjse_runtimedata.h"
 
-#include "fpdfsdk/jsapi/include/fxjs_v8.h"
 #include "fxjs/cfxjse_isolatetracker.h"
+#include "fxjs/include/fxjs_v8.h"
 
 namespace {
 
diff --git a/fxjs/fxjs_v8.cpp b/fxjs/fxjs_v8.cpp
new file mode 100644
index 0000000000..c98de070ab
--- /dev/null
+++ b/fxjs/fxjs_v8.cpp
@@ -0,0 +1,856 @@
+// 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
+
+#include "fxjs/include/fxjs_v8.h"
+
+#include <vector>
+
+#include "core/fxcrt/include/fx_basic.h"
+
+const wchar_t kFXJSValueNameString[] = L"string";
+const wchar_t kFXJSValueNameNumber[] = L"number";
+const wchar_t kFXJSValueNameBoolean[] = L"boolean";
+const wchar_t kFXJSValueNameDate[] = L"date";
+const wchar_t kFXJSValueNameObject[] = L"object";
+const wchar_t kFXJSValueNameFxobj[] = L"fxobj";
+const wchar_t kFXJSValueNameNull[] = L"null";
+const wchar_t kFXJSValueNameUndefined[] = L"undefined";
+
+// Keep this consistent with the values defined in gin/public/context_holder.h
+// (without actually requiring a dependency on gin itself for the standalone
+// embedders of PDFIum). The value we want to use is:
+//   kPerContextDataStartIndex + kEmbedderPDFium, which is 3.
+static const unsigned int kPerContextDataIndex = 3u;
+static unsigned int g_embedderDataSlot = 1u;
+static v8::Isolate* g_isolate = nullptr;
+static size_t g_isolate_ref_count = 0;
+static FXJS_ArrayBufferAllocator* g_arrayBufferAllocator = nullptr;
+static v8::Global<v8::ObjectTemplate>* g_DefaultGlobalObjectTemplate = nullptr;
+
+class CFXJS_PerObjectData {
+ public:
+  explicit CFXJS_PerObjectData(int nObjDefID)
+      : m_ObjDefID(nObjDefID), m_pPrivate(nullptr) {}
+
+  const int m_ObjDefID;
+  void* m_pPrivate;
+};
+
+class CFXJS_ObjDefinition {
+ public:
+  static int MaxID(v8::Isolate* pIsolate) {
+    return FXJS_PerIsolateData::Get(pIsolate)->m_ObjectDefnArray.size();
+  }
+
+  static CFXJS_ObjDefinition* ForID(v8::Isolate* pIsolate, int id) {
+    // Note: GetAt() halts if out-of-range even in release builds.
+    return FXJS_PerIsolateData::Get(pIsolate)->m_ObjectDefnArray[id];
+  }
+
+  CFXJS_ObjDefinition(v8::Isolate* isolate,
+                      const wchar_t* sObjName,
+                      FXJSOBJTYPE eObjType,
+                      FXJS_CONSTRUCTOR pConstructor,
+                      FXJS_DESTRUCTOR pDestructor)
+      : m_ObjName(sObjName),
+        m_ObjType(eObjType),
+        m_pConstructor(pConstructor),
+        m_pDestructor(pDestructor),
+        m_pIsolate(isolate) {
+    v8::Isolate::Scope isolate_scope(isolate);
+    v8::HandleScope handle_scope(isolate);
+
+    v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(isolate);
+    fun->InstanceTemplate()->SetInternalFieldCount(2);
+    if (eObjType == FXJSOBJTYPE_GLOBAL) {
+      fun->InstanceTemplate()->Set(
+          v8::Symbol::GetToStringTag(isolate),
+          v8::String::NewFromUtf8(isolate, "global", v8::NewStringType::kNormal)
+              .ToLocalChecked());
+    }
+    m_FunctionTemplate.Reset(isolate, fun);
+
+    v8::Local<v8::Signature> sig = v8::Signature::New(isolate, fun);
+    m_Signature.Reset(isolate, sig);
+  }
+
+  int AssignID() {
+    FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(m_pIsolate);
+    pData->m_ObjectDefnArray.push_back(this);
+    return pData->m_ObjectDefnArray.size() - 1;
+  }
+
+  v8::Local<v8::ObjectTemplate> GetInstanceTemplate() {
+    v8::EscapableHandleScope scope(m_pIsolate);
+    v8::Local<v8::FunctionTemplate> function =
+        m_FunctionTemplate.Get(m_pIsolate);
+    return scope.Escape(function->InstanceTemplate());
+  }
+
+  v8::Local<v8::Signature> GetSignature() {
+    v8::EscapableHandleScope scope(m_pIsolate);
+    return scope.Escape(m_Signature.Get(m_pIsolate));
+  }
+
+  const wchar_t* const m_ObjName;
+  const FXJSOBJTYPE m_ObjType;
+  const FXJS_CONSTRUCTOR m_pConstructor;
+  const FXJS_DESTRUCTOR m_pDestructor;
+
+  v8::Isolate* m_pIsolate;
+  v8::Global<v8::FunctionTemplate> m_FunctionTemplate;
+  v8::Global<v8::Signature> m_Signature;
+};
+
+static v8::Local<v8::ObjectTemplate> GetGlobalObjectTemplate(
+    v8::Isolate* pIsolate) {
+  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
+  for (int i = 0; i < maxID; ++i) {
+    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
+    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL)
+      return pObjDef->GetInstanceTemplate();
+  }
+  if (!g_DefaultGlobalObjectTemplate) {
+    v8::Local<v8::ObjectTemplate> hGlobalTemplate =
+        v8::ObjectTemplate::New(pIsolate);
+    hGlobalTemplate->Set(
+        v8::Symbol::GetToStringTag(pIsolate),
+        v8::String::NewFromUtf8(pIsolate, "global", v8::NewStringType::kNormal)
+            .ToLocalChecked());
+    g_DefaultGlobalObjectTemplate =
+        new v8::Global<v8::ObjectTemplate>(pIsolate, hGlobalTemplate);
+  }
+  return g_DefaultGlobalObjectTemplate->Get(pIsolate);
+}
+
+void* FXJS_ArrayBufferAllocator::Allocate(size_t length) {
+  return calloc(1, length);
+}
+
+void* FXJS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
+  return malloc(length);
+}
+
+void FXJS_ArrayBufferAllocator::Free(void* data, size_t length) {
+  free(data);
+}
+
+void V8TemplateMapTraits::Dispose(v8::Isolate* isolate,
+                                  v8::Global<v8::Object> value,
+                                  void* key) {
+  v8::Local<v8::Object> obj = value.Get(isolate);
+  if (obj.IsEmpty())
+    return;
+  int id = FXJS_GetObjDefnID(obj);
+  if (id == -1)
+    return;
+
+  CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(isolate, id);
+  if (!pObjDef)
+    return;
+  if (pObjDef->m_pDestructor)
+    pObjDef->m_pDestructor(obj);
+  FXJS_FreePrivate(obj);
+}
+
+V8TemplateMapTraits::MapType* V8TemplateMapTraits::MapFromWeakCallbackInfo(
+    const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {
+  V8TemplateMap* pMap =
+      (FXJS_PerIsolateData::Get(data.GetIsolate()))->m_pDynamicObjsMap;
+  return pMap ? &pMap->m_map : nullptr;
+}
+
+void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate) {
+  if (g_isolate) {
+    ASSERT(g_embedderDataSlot == embedderDataSlot);
+    ASSERT(g_isolate == pIsolate);
+    return;
+  }
+  g_embedderDataSlot = embedderDataSlot;
+  g_isolate = pIsolate;
+}
+
+void FXJS_Release() {
+  ASSERT(!g_isolate || g_isolate_ref_count == 0);
+  delete g_DefaultGlobalObjectTemplate;
+  g_DefaultGlobalObjectTemplate = nullptr;
+  g_isolate = nullptr;
+
+  delete g_arrayBufferAllocator;
+  g_arrayBufferAllocator = nullptr;
+}
+
+bool FXJS_GetIsolate(v8::Isolate** pResultIsolate) {
+  if (g_isolate) {
+    *pResultIsolate = g_isolate;
+    return false;
+  }
+  // Provide backwards compatibility when no external isolate.
+  if (!g_arrayBufferAllocator)
+    g_arrayBufferAllocator = new FXJS_ArrayBufferAllocator();
+  v8::Isolate::CreateParams params;
+  params.array_buffer_allocator = g_arrayBufferAllocator;
+  *pResultIsolate = v8::Isolate::New(params);
+  return true;
+}
+
+size_t FXJS_GlobalIsolateRefCount() {
+  return g_isolate_ref_count;
+}
+
+V8TemplateMap::V8TemplateMap(v8::Isolate* isolate) : m_map(isolate) {}
+
+V8TemplateMap::~V8TemplateMap() {}
+
+void V8TemplateMap::set(void* key, v8::Local<v8::Object> handle) {
+  ASSERT(!m_map.Contains(key));
+  m_map.Set(key, handle);
+}
+
+FXJS_PerIsolateData::~FXJS_PerIsolateData() {}
+
+// static
+void FXJS_PerIsolateData::SetUp(v8::Isolate* pIsolate) {
+  if (!pIsolate->GetData(g_embedderDataSlot))
+    pIsolate->SetData(g_embedderDataSlot, new FXJS_PerIsolateData());
+}
+
+// static
+FXJS_PerIsolateData* FXJS_PerIsolateData::Get(v8::Isolate* pIsolate) {
+  return static_cast<FXJS_PerIsolateData*>(
+      pIsolate->GetData(g_embedderDataSlot));
+}
+
+#ifndef PDF_ENABLE_XFA
+FXJS_PerIsolateData::FXJS_PerIsolateData() : m_pDynamicObjsMap(nullptr) {}
+#else   // PDF_ENABLE_XFA
+FXJS_PerIsolateData::FXJS_PerIsolateData()
+    : m_pFXJSERuntimeData(nullptr), m_pDynamicObjsMap(nullptr) {}
+#endif  // PDF_ENABLE_XFA
+
+int FXJS_DefineObj(v8::Isolate* pIsolate,
+                   const wchar_t* sObjName,
+                   FXJSOBJTYPE eObjType,
+                   FXJS_CONSTRUCTOR pConstructor,
+                   FXJS_DESTRUCTOR pDestructor) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+
+  FXJS_PerIsolateData::SetUp(pIsolate);
+  CFXJS_ObjDefinition* pObjDef = new CFXJS_ObjDefinition(
+      pIsolate, sObjName, eObjType, pConstructor, pDestructor);
+  return pObjDef->AssignID();
+}
+
+void FXJS_DefineObjMethod(v8::Isolate* pIsolate,
+                          int nObjDefnID,
+                          const wchar_t* sMethodName,
+                          v8::FunctionCallback pMethodCall) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFX_ByteString bsMethodName = CFX_WideString(sMethodName).UTF8Encode();
+  CFXJS_ObjDefinition* pObjDef =
+      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
+  v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(
+      pIsolate, pMethodCall, v8::Local<v8::Value>(), pObjDef->GetSignature());
+  fun->RemovePrototype();
+  pObjDef->GetInstanceTemplate()->Set(
+      v8::String::NewFromUtf8(pIsolate, bsMethodName.c_str(),
+                              v8::NewStringType::kNormal)
+          .ToLocalChecked(),
+      fun, v8::ReadOnly);
+}
+
+void FXJS_DefineObjProperty(v8::Isolate* pIsolate,
+                            int nObjDefnID,
+                            const wchar_t* sPropName,
+                            v8::AccessorGetterCallback pPropGet,
+                            v8::AccessorSetterCallback pPropPut) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFX_ByteString bsPropertyName = CFX_WideString(sPropName).UTF8Encode();
+  CFXJS_ObjDefinition* pObjDef =
+      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
+  pObjDef->GetInstanceTemplate()->SetAccessor(
+      v8::String::NewFromUtf8(pIsolate, bsPropertyName.c_str(),
+                              v8::NewStringType::kNormal)
+          .ToLocalChecked(),
+      pPropGet, pPropPut);
+}
+
+void FXJS_DefineObjAllProperties(v8::Isolate* pIsolate,
+                                 int nObjDefnID,
+                                 v8::NamedPropertyQueryCallback pPropQurey,
+                                 v8::NamedPropertyGetterCallback pPropGet,
+                                 v8::NamedPropertySetterCallback pPropPut,
+                                 v8::NamedPropertyDeleterCallback pPropDel) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFXJS_ObjDefinition* pObjDef =
+      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
+  pObjDef->GetInstanceTemplate()->SetNamedPropertyHandler(pPropGet, pPropPut,
+                                                          pPropQurey, pPropDel);
+}
+
+void FXJS_DefineObjConst(v8::Isolate* pIsolate,
+                         int nObjDefnID,
+                         const wchar_t* sConstName,
+                         v8::Local<v8::Value> pDefault) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFX_ByteString bsConstName = CFX_WideString(sConstName).UTF8Encode();
+  CFXJS_ObjDefinition* pObjDef =
+      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
+  pObjDef->GetInstanceTemplate()->Set(pIsolate, bsConstName.c_str(), pDefault);
+}
+
+void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
+                             const wchar_t* sMethodName,
+                             v8::FunctionCallback pMethodCall) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFX_ByteString bsMethodName = CFX_WideString(sMethodName).UTF8Encode();
+  v8::Local<v8::FunctionTemplate> fun =
+      v8::FunctionTemplate::New(pIsolate, pMethodCall);
+  fun->RemovePrototype();
+  GetGlobalObjectTemplate(pIsolate)->Set(
+      v8::String::NewFromUtf8(pIsolate, bsMethodName.c_str(),
+                              v8::NewStringType::kNormal)
+          .ToLocalChecked(),
+      fun, v8::ReadOnly);
+}
+
+void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
+                            const wchar_t* sConstName,
+                            v8::FunctionCallback pConstGetter) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  CFX_ByteString bsConst = CFX_WideString(sConstName).UTF8Encode();
+  v8::Local<v8::FunctionTemplate> fun =
+      v8::FunctionTemplate::New(pIsolate, pConstGetter);
+  fun->RemovePrototype();
+  GetGlobalObjectTemplate(pIsolate)->SetAccessorProperty(
+      v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
+                              v8::NewStringType::kNormal)
+          .ToLocalChecked(),
+      fun);
+}
+
+void FXJS_InitializeRuntime(
+    v8::Isolate* pIsolate,
+    IJS_Runtime* pIRuntime,
+    v8::Global<v8::Context>* pV8PersistentContext,
+    std::vector<v8::Global<v8::Object>*>* pStaticObjects) {
+  if (pIsolate == g_isolate)
+    ++g_isolate_ref_count;
+
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+
+  // This has to happen before we call GetGlobalObjectTemplate because that
+  // method gets the PerIsolateData from pIsolate.
+  FXJS_PerIsolateData::SetUp(pIsolate);
+
+  v8::Local<v8::Context> v8Context =
+      v8::Context::New(pIsolate, nullptr, GetGlobalObjectTemplate(pIsolate));
+  v8::Context::Scope context_scope(v8Context);
+
+  FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
+  if (!pData)
+    return;
+  pData->CreateDynamicObjsMap(pIsolate);
+  v8Context->SetAlignedPointerInEmbedderData(kPerContextDataIndex, pIRuntime);
+
+  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
+  pStaticObjects->resize(maxID + 1);
+  for (int i = 0; i < maxID; ++i) {
+    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
+    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) {
+      v8Context->Global()
+          ->GetPrototype()
+          ->ToObject(v8Context)
+          .ToLocalChecked()
+          ->SetAlignedPointerInInternalField(0, new CFXJS_PerObjectData(i));
+
+      if (pObjDef->m_pConstructor)
+        pObjDef->m_pConstructor(pIRuntime, v8Context->Global()
+                                               ->GetPrototype()
+                                               ->ToObject(v8Context)
+                                               .ToLocalChecked());
+    } else if (pObjDef->m_ObjType == FXJSOBJTYPE_STATIC) {
+      CFX_ByteString bs = CFX_WideString(pObjDef->m_ObjName).UTF8Encode();
+      v8::Local<v8::String> m_ObjName =
+          v8::String::NewFromUtf8(pIsolate, bs.c_str(),
+                                  v8::NewStringType::kNormal, bs.GetLength())
+              .ToLocalChecked();
+
+      v8::Local<v8::Object> obj =
+          FXJS_NewFxDynamicObj(pIsolate, pIRuntime, i, true);
+      v8Context->Global()->Set(v8Context, m_ObjName, obj).FromJust();
+      pStaticObjects->at(i) = new v8::Global<v8::Object>(pIsolate, obj);
+    }
+  }
+  pV8PersistentContext->Reset(pIsolate, v8Context);
+}
+
+void FXJS_ReleaseRuntime(v8::Isolate* pIsolate,
+                         v8::Global<v8::Context>* pV8PersistentContext,
+                         std::vector<v8::Global<v8::Object>*>* pStaticObjects) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::HandleScope handle_scope(pIsolate);
+  v8::Local<v8::Context> context =
+      v8::Local<v8::Context>::New(pIsolate, *pV8PersistentContext);
+  v8::Context::Scope context_scope(context);
+
+  FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
+  if (!pData)
+    return;
+
+  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
+  for (int i = 0; i < maxID; ++i) {
+    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
+    v8::Local<v8::Object> pObj;
+    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) {
+      pObj =
+          context->Global()->GetPrototype()->ToObject(context).ToLocalChecked();
+    } else if (pStaticObjects->at(i) && !pStaticObjects->at(i)->IsEmpty()) {
+      pObj = v8::Local<v8::Object>::New(pIsolate, *pStaticObjects->at(i));
+      delete pStaticObjects->at(i);
+      pStaticObjects->at(i) = nullptr;
+    }
+
+    if (!pObj.IsEmpty()) {
+      if (pObjDef->m_pDestructor)
+        pObjDef->m_pDestructor(pObj);
+      FXJS_FreePrivate(pObj);
+    }
+  }
+
+  if (pIsolate == g_isolate && --g_isolate_ref_count > 0)
+    return;
+
+  pData->ReleaseDynamicObjsMap();
+  for (int i = 0; i < maxID; ++i)
+    delete CFXJS_ObjDefinition::ForID(pIsolate, i);
+
+  pIsolate->SetData(g_embedderDataSlot, nullptr);
+  delete pData;
+}
+
+IJS_Runtime* FXJS_GetRuntimeFromIsolate(v8::Isolate* pIsolate) {
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return static_cast<IJS_Runtime*>(
+      context->GetAlignedPointerFromEmbedderData(kPerContextDataIndex));
+}
+
+#ifdef PDF_ENABLE_XFA
+void FXJS_SetRuntimeForV8Context(v8::Local<v8::Context> v8Context,
+                                 IJS_Runtime* pIRuntime) {
+  v8Context->SetAlignedPointerInEmbedderData(kPerContextDataIndex, pIRuntime);
+}
+#endif  // PDF_ENABLE_XFA
+
+int FXJS_Execute(v8::Isolate* pIsolate,
+                 const CFX_WideString& script,
+                 FXJSErr* pError) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::TryCatch try_catch(pIsolate);
+  CFX_ByteString bsScript = script.UTF8Encode();
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  v8::Local<v8::Script> compiled_script;
+  if (!v8::Script::Compile(context,
+                           v8::String::NewFromUtf8(pIsolate, bsScript.c_str(),
+                                                   v8::NewStringType::kNormal,
+                                                   bsScript.GetLength())
+                               .ToLocalChecked())
+           .ToLocal(&compiled_script)) {
+    v8::String::Utf8Value error(try_catch.Exception());
+    // TODO(tsepez): return error via pError->message.
+    return -1;
+  }
+
+  v8::Local<v8::Value> result;
+  if (!compiled_script->Run(context).ToLocal(&result)) {
+    v8::String::Utf8Value error(try_catch.Exception());
+    // TODO(tsepez): return error via pError->message.
+    return -1;
+  }
+  return 0;
+}
+
+v8::Local<v8::Object> FXJS_NewFxDynamicObj(v8::Isolate* pIsolate,
+                                           IJS_Runtime* pIRuntime,
+                                           int nObjDefnID,
+                                           bool bStatic) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  if (nObjDefnID == -1) {
+    v8::Local<v8::ObjectTemplate> objTempl = v8::ObjectTemplate::New(pIsolate);
+    v8::Local<v8::Object> obj;
+    if (!objTempl->NewInstance(context).ToLocal(&obj))
+      return v8::Local<v8::Object>();
+    return obj;
+  }
+
+  FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
+  if (!pData)
+    return v8::Local<v8::Object>();
+
+  if (nObjDefnID < 0 || nObjDefnID >= CFXJS_ObjDefinition::MaxID(pIsolate))
+    return v8::Local<v8::Object>();
+
+  CFXJS_ObjDefinition* pObjDef =
+      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
+  v8::Local<v8::Object> obj;
+  if (!pObjDef->GetInstanceTemplate()->NewInstance(context).ToLocal(&obj))
+    return v8::Local<v8::Object>();
+
+  CFXJS_PerObjectData* pPerObjData = new CFXJS_PerObjectData(nObjDefnID);
+  obj->SetAlignedPointerInInternalField(0, pPerObjData);
+  if (pObjDef->m_pConstructor)
+    pObjDef->m_pConstructor(pIRuntime, obj);
+
+  if (!bStatic && FXJS_PerIsolateData::Get(pIsolate)->m_pDynamicObjsMap) {
+    FXJS_PerIsolateData::Get(pIsolate)->m_pDynamicObjsMap->set(pPerObjData,
+                                                               obj);
+  }
+  return obj;
+}
+
+v8::Local<v8::Object> FXJS_GetThisObj(v8::Isolate* pIsolate) {
+  v8::Isolate::Scope isolate_scope(pIsolate);
+  if (!FXJS_PerIsolateData::Get(pIsolate))
+    return v8::Local<v8::Object>();
+
+  // Return the global object.
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return context->Global()->GetPrototype()->ToObject(context).ToLocalChecked();
+}
+
+int FXJS_GetObjDefnID(v8::Local<v8::Object> pObj) {
+  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
+    return -1;
+  CFXJS_PerObjectData* pPerObjectData = static_cast<CFXJS_PerObjectData*>(
+      pObj->GetAlignedPointerFromInternalField(0));
+  if (pPerObjectData)
+    return pPerObjectData->m_ObjDefID;
+  return -1;
+}
+
+void FXJS_Error(v8::Isolate* pIsolate, const CFX_WideString& message) {
+  // Conversion from pdfium's wchar_t wide-strings to v8's uint16_t
+  // wide-strings isn't handled by v8, so use UTF8 as a common
+  // intermediate format.
+  CFX_ByteString utf8_message = message.UTF8Encode();
+  pIsolate->ThrowException(v8::String::NewFromUtf8(pIsolate,
+                                                   utf8_message.c_str(),
+                                                   v8::NewStringType::kNormal)
+                               .ToLocalChecked());
+}
+
+const wchar_t* FXJS_GetTypeof(v8::Local<v8::Value> pObj) {
+  if (pObj.IsEmpty())
+    return nullptr;
+  if (pObj->IsString())
+    return kFXJSValueNameString;
+  if (pObj->IsNumber())
+    return kFXJSValueNameNumber;
+  if (pObj->IsBoolean())
+    return kFXJSValueNameBoolean;
+  if (pObj->IsDate())
+    return kFXJSValueNameDate;
+  if (pObj->IsObject())
+    return kFXJSValueNameObject;
+  if (pObj->IsNull())
+    return kFXJSValueNameNull;
+  if (pObj->IsUndefined())
+    return kFXJSValueNameUndefined;
+  return nullptr;
+}
+
+void FXJS_SetPrivate(v8::Isolate* pIsolate,
+                     v8::Local<v8::Object> pObj,
+                     void* p) {
+  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
+    return;
+  CFXJS_PerObjectData* pPerObjectData = static_cast<CFXJS_PerObjectData*>(
+      pObj->GetAlignedPointerFromInternalField(0));
+  if (!pPerObjectData)
+    return;
+  pPerObjectData->m_pPrivate = p;
+}
+
+void* FXJS_GetPrivate(v8::Isolate* pIsolate, v8::Local<v8::Object> pObj) {
+  if (pObj.IsEmpty())
+    return nullptr;
+  CFXJS_PerObjectData* pPerObjectData = nullptr;
+  if (pObj->InternalFieldCount()) {
+    pPerObjectData = static_cast<CFXJS_PerObjectData*>(
+        pObj->GetAlignedPointerFromInternalField(0));
+  } else {
+    // It could be a global proxy object.
+    v8::Local<v8::Value> v = pObj->GetPrototype();
+    v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+    if (v->IsObject()) {
+      pPerObjectData = static_cast<CFXJS_PerObjectData*>(
+          v->ToObject(context)
+              .ToLocalChecked()
+              ->GetAlignedPointerFromInternalField(0));
+    }
+  }
+  return pPerObjectData ? pPerObjectData->m_pPrivate : nullptr;
+}
+
+void FXJS_FreePrivate(void* pPerObjectData) {
+  delete static_cast<CFXJS_PerObjectData*>(pPerObjectData);
+}
+
+void FXJS_FreePrivate(v8::Local<v8::Object> pObj) {
+  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
+    return;
+  FXJS_FreePrivate(pObj->GetAlignedPointerFromInternalField(0));
+  pObj->SetAlignedPointerInInternalField(0, nullptr);
+}
+
+v8::Local<v8::String> FXJS_WSToJSString(v8::Isolate* pIsolate,
+                                        const CFX_WideString& wsPropertyName) {
+  CFX_ByteString bs = wsPropertyName.UTF8Encode();
+  if (!pIsolate)
+    pIsolate = v8::Isolate::GetCurrent();
+  return v8::String::NewFromUtf8(pIsolate, bs.c_str(),
+                                 v8::NewStringType::kNormal, bs.GetLength())
+      .ToLocalChecked();
+}
+
+v8::Local<v8::Value> FXJS_GetObjectElement(
+    v8::Isolate* pIsolate,
+    v8::Local<v8::Object> pObj,
+    const CFX_WideString& wsPropertyName) {
+  if (pObj.IsEmpty())
+    return v8::Local<v8::Value>();
+  v8::Local<v8::Value> val;
+  if (!pObj->Get(pIsolate->GetCurrentContext(),
+                 FXJS_WSToJSString(pIsolate, wsPropertyName))
+           .ToLocal(&val))
+    return v8::Local<v8::Value>();
+  return val;
+}
+
+v8::Local<v8::Array> FXJS_GetObjectElementNames(v8::Isolate* pIsolate,
+                                                v8::Local<v8::Object> pObj) {
+  if (pObj.IsEmpty())
+    return v8::Local<v8::Array>();
+  v8::Local<v8::Array> val;
+  if (!pObj->GetPropertyNames(pIsolate->GetCurrentContext()).ToLocal(&val))
+    return v8::Local<v8::Array>();
+  return val;
+}
+
+void FXJS_PutObjectString(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          const CFX_WideString& wsValue) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            FXJS_WSToJSString(pIsolate, wsValue))
+      .FromJust();
+}
+
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          int nValue) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            v8::Int32::New(pIsolate, nValue))
+      .FromJust();
+}
+
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          float fValue) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            v8::Number::New(pIsolate, (double)fValue))
+      .FromJust();
+}
+
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          double dValue) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            v8::Number::New(pIsolate, (double)dValue))
+      .FromJust();
+}
+
+void FXJS_PutObjectBoolean(v8::Isolate* pIsolate,
+                           v8::Local<v8::Object> pObj,
+                           const CFX_WideString& wsPropertyName,
+                           bool bValue) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            v8::Boolean::New(pIsolate, bValue))
+      .FromJust();
+}
+
+void FXJS_PutObjectObject(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          v8::Local<v8::Object> pPut) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName), pPut)
+      .FromJust();
+}
+
+void FXJS_PutObjectNull(v8::Isolate* pIsolate,
+                        v8::Local<v8::Object> pObj,
+                        const CFX_WideString& wsPropertyName) {
+  if (pObj.IsEmpty())
+    return;
+  pObj->Set(pIsolate->GetCurrentContext(),
+            FXJS_WSToJSString(pIsolate, wsPropertyName),
+            v8::Local<v8::Object>())
+      .FromJust();
+}
+
+v8::Local<v8::Array> FXJS_NewArray(v8::Isolate* pIsolate) {
+  return v8::Array::New(pIsolate);
+}
+
+unsigned FXJS_PutArrayElement(v8::Isolate* pIsolate,
+                              v8::Local<v8::Array> pArray,
+                              unsigned index,
+                              v8::Local<v8::Value> pValue) {
+  if (pArray.IsEmpty())
+    return 0;
+  if (pArray->Set(pIsolate->GetCurrentContext(), index, pValue).IsNothing())
+    return 0;
+  return 1;
+}
+
+v8::Local<v8::Value> FXJS_GetArrayElement(v8::Isolate* pIsolate,
+                                          v8::Local<v8::Array> pArray,
+                                          unsigned index) {
+  if (pArray.IsEmpty())
+    return v8::Local<v8::Value>();
+  v8::Local<v8::Value> val;
+  if (!pArray->Get(pIsolate->GetCurrentContext(), index).ToLocal(&val))
+    return v8::Local<v8::Value>();
+  return val;
+}
+
+unsigned FXJS_GetArrayLength(v8::Local<v8::Array> pArray) {
+  if (pArray.IsEmpty())
+    return 0;
+  return pArray->Length();
+}
+
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, int number) {
+  return v8::Int32::New(pIsolate, number);
+}
+
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, double number) {
+  return v8::Number::New(pIsolate, number);
+}
+
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, float number) {
+  return v8::Number::New(pIsolate, (float)number);
+}
+
+v8::Local<v8::Value> FXJS_NewBoolean(v8::Isolate* pIsolate, bool b) {
+  return v8::Boolean::New(pIsolate, b);
+}
+
+v8::Local<v8::Value> FXJS_NewObject(v8::Isolate* pIsolate,
+                                    v8::Local<v8::Object> pObj) {
+  if (pObj.IsEmpty())
+    return v8::Local<v8::Value>();
+  return pObj->Clone();
+}
+
+v8::Local<v8::Value> FXJS_NewObject2(v8::Isolate* pIsolate,
+                                     v8::Local<v8::Array> pObj) {
+  if (pObj.IsEmpty())
+    return v8::Local<v8::Value>();
+  return pObj->Clone();
+}
+
+v8::Local<v8::Value> FXJS_NewString(v8::Isolate* pIsolate, const wchar_t* str) {
+  return FXJS_WSToJSString(pIsolate, str);
+}
+
+v8::Local<v8::Value> FXJS_NewNull() {
+  return v8::Local<v8::Value>();
+}
+
+v8::Local<v8::Value> FXJS_NewDate(v8::Isolate* pIsolate, double d) {
+  return v8::Date::New(pIsolate->GetCurrentContext(), d).ToLocalChecked();
+}
+
+int FXJS_ToInt32(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return 0;
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return pValue->ToInt32(context).ToLocalChecked()->Value();
+}
+
+bool FXJS_ToBoolean(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return false;
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return pValue->ToBoolean(context).ToLocalChecked()->Value();
+}
+
+double FXJS_ToNumber(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return 0.0;
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return pValue->ToNumber(context).ToLocalChecked()->Value();
+}
+
+v8::Local<v8::Object> FXJS_ToObject(v8::Isolate* pIsolate,
+                                    v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return v8::Local<v8::Object>();
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return pValue->ToObject(context).ToLocalChecked();
+}
+
+CFX_WideString FXJS_ToString(v8::Isolate* pIsolate,
+                             v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return L"";
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  v8::String::Utf8Value s(pValue->ToString(context).ToLocalChecked());
+  return CFX_WideString::FromUTF8(CFX_ByteStringC(*s, s.length()));
+}
+
+v8::Local<v8::Array> FXJS_ToArray(v8::Isolate* pIsolate,
+                                  v8::Local<v8::Value> pValue) {
+  if (pValue.IsEmpty())
+    return v8::Local<v8::Array>();
+  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
+  return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
+}
+
+void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom) {
+  pTo = pFrom;
+}
diff --git a/fxjs/fxjs_v8_embeddertest.cpp b/fxjs/fxjs_v8_embeddertest.cpp
new file mode 100644
index 0000000000..b33ddca32d
--- /dev/null
+++ b/fxjs/fxjs_v8_embeddertest.cpp
@@ -0,0 +1,83 @@
+// Copyright 2015 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.
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/js_embedder_test.h"
+
+namespace {
+
+const double kExpected0 = 6.0;
+const double kExpected1 = 7.0;
+const double kExpected2 = 8.0;
+
+const wchar_t kScript0[] = L"fred = 6";
+const wchar_t kScript1[] = L"fred = 7";
+const wchar_t kScript2[] = L"fred = 8";
+
+}  // namespace
+
+class FXJSV8EmbedderTest : public JSEmbedderTest {
+ public:
+  void ExecuteInCurrentContext(const CFX_WideString& script) {
+    FXJSErr error;
+    int sts = FXJS_Execute(isolate(), script, &error);
+    EXPECT_EQ(0, sts);
+  }
+  void CheckAssignmentInCurrentContext(double expected) {
+    v8::Local<v8::Object> This = FXJS_GetThisObj(isolate());
+    v8::Local<v8::Value> fred = FXJS_GetObjectElement(isolate(), This, L"fred");
+    EXPECT_TRUE(fred->IsNumber());
+    EXPECT_EQ(expected, fred->ToNumber(isolate()->GetCurrentContext())
+                            .ToLocalChecked()
+                            ->Value());
+  }
+};
+
+TEST_F(FXJSV8EmbedderTest, Getters) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+  v8::Context::Scope context_scope(GetV8Context());
+
+  ExecuteInCurrentContext(CFX_WideString(kScript1));
+  CheckAssignmentInCurrentContext(kExpected1);
+}
+
+TEST_F(FXJSV8EmbedderTest, MultipleRutimes) {
+  v8::Isolate::Scope isolate_scope(isolate());
+  v8::HandleScope handle_scope(isolate());
+
+  v8::Global<v8::Context> global_context1;
+  std::vector<v8::Global<v8::Object>*> static_objects1;
+  FXJS_InitializeRuntime(isolate(), nullptr, &global_context1,
+                         &static_objects1);
+
+  v8::Global<v8::Context> global_context2;
+  std::vector<v8::Global<v8::Object>*> static_objects2;
+  FXJS_InitializeRuntime(isolate(), nullptr, &global_context2,
+                         &static_objects2);
+
+  v8::Context::Scope context_scope(GetV8Context());
+  ExecuteInCurrentContext(CFX_WideString(kScript0));
+  CheckAssignmentInCurrentContext(kExpected0);
+
+  {
+    v8::Local<v8::Context> context1 =
+        v8::Local<v8::Context>::New(isolate(), global_context1);
+    v8::Context::Scope context_scope1(context1);
+    ExecuteInCurrentContext(CFX_WideString(kScript1));
+    CheckAssignmentInCurrentContext(kExpected1);
+  }
+  FXJS_ReleaseRuntime(isolate(), &global_context1, &static_objects1);
+
+  {
+    v8::Local<v8::Context> context2 =
+        v8::Local<v8::Context>::New(isolate(), global_context2);
+    v8::Context::Scope context_scope2(context2);
+    ExecuteInCurrentContext(CFX_WideString(kScript2));
+    CheckAssignmentInCurrentContext(kExpected2);
+  }
+  FXJS_ReleaseRuntime(isolate(), &global_context2, &static_objects2);
+
+  CheckAssignmentInCurrentContext(kExpected0);
+}
diff --git a/fxjs/include/fxjs_v8.h b/fxjs/include/fxjs_v8.h
new file mode 100644
index 0000000000..465feef5e8
--- /dev/null
+++ b/fxjs/include/fxjs_v8.h
@@ -0,0 +1,290 @@
+// 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_INCLUDE_FXJS_V8_H_
+#define FXJS_INCLUDE_FXJS_V8_H_
+
+#include <v8-util.h>
+#include <v8.h>
+
+#include <vector>
+
+#include "core/fxcrt/include/fx_string.h"
+
+class CFXJS_ObjDefinition;
+
+// FXJS_V8 places no restrictions on these two classes; it merely passes them
+// on to caller-provided methods.
+class IJS_Context;  // A description of the event that caused JS execution.
+class IJS_Runtime;  // A native runtime, typically owns the v8::Context.
+
+#ifdef PDF_ENABLE_XFA
+// FXJS_V8 places no interpreation on this calass; it merely passes it
+// along to XFA.
+class CFXJSE_RuntimeData;
+#endif  // PDF_ENABLE_XFA
+
+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,
+      const 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);
+
+  void CreateDynamicObjsMap(v8::Isolate* pIsolate) {
+    if (!m_pDynamicObjsMap)
+      m_pDynamicObjsMap = new V8TemplateMap(pIsolate);
+  }
+  void ReleaseDynamicObjsMap() {
+    delete m_pDynamicObjsMap;
+    m_pDynamicObjsMap = nullptr;
+  }
+
+  std::vector<CFXJS_ObjDefinition*> m_ObjectDefnArray;
+#ifdef PDF_ENABLE_XFA
+  CFXJSE_RuntimeData* m_pFXJSERuntimeData;
+#endif  // PDF_ENABLE_XFA
+  V8TemplateMap* m_pDynamicObjsMap;
+
+ protected:
+  FXJS_PerIsolateData();
+};
+
+extern const wchar_t kFXJSValueNameString[];
+extern const wchar_t kFXJSValueNameNumber[];
+extern const wchar_t kFXJSValueNameBoolean[];
+extern const wchar_t kFXJSValueNameDate[];
+extern const wchar_t kFXJSValueNameObject[];
+extern const wchar_t kFXJSValueNameFxobj[];
+extern const wchar_t kFXJSValueNameNull[];
+extern const wchar_t kFXJSValueNameUndefined[];
+
+class FXJS_ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+  void* Allocate(size_t length) override;
+  void* AllocateUninitialized(size_t length) override;
+  void Free(void* data, size_t length) override;
+};
+
+using FXJS_CONSTRUCTOR = void (*)(IJS_Runtime* cc, v8::Local<v8::Object> obj);
+using FXJS_DESTRUCTOR = void (*)(v8::Local<v8::Object> obj);
+
+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();
+
+// Always returns a valid, newly-created objDefnID.
+int FXJS_DefineObj(v8::Isolate* pIsolate,
+                   const wchar_t* sObjName,
+                   FXJSOBJTYPE eObjType,
+                   FXJS_CONSTRUCTOR pConstructor,
+                   FXJS_DESTRUCTOR pDestructor);
+
+void FXJS_DefineObjMethod(v8::Isolate* pIsolate,
+                          int nObjDefnID,
+                          const wchar_t* sMethodName,
+                          v8::FunctionCallback pMethodCall);
+void FXJS_DefineObjProperty(v8::Isolate* pIsolate,
+                            int nObjDefnID,
+                            const wchar_t* sPropName,
+                            v8::AccessorGetterCallback pPropGet,
+                            v8::AccessorSetterCallback pPropPut);
+void FXJS_DefineObjAllProperties(v8::Isolate* pIsolate,
+                                 int nObjDefnID,
+                                 v8::NamedPropertyQueryCallback pPropQurey,
+                                 v8::NamedPropertyGetterCallback pPropGet,
+                                 v8::NamedPropertySetterCallback pPropPut,
+                                 v8::NamedPropertyDeleterCallback pPropDel);
+void FXJS_DefineObjConst(v8::Isolate* pIsolate,
+                         int nObjDefnID,
+                         const wchar_t* sConstName,
+                         v8::Local<v8::Value> pDefault);
+void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
+                             const wchar_t* sMethodName,
+                             v8::FunctionCallback pMethodCall);
+void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
+                            const wchar_t* sConstName,
+                            v8::FunctionCallback pConstGetter);
+
+// Called after FXJS_Define* calls made.
+void FXJS_InitializeRuntime(
+    v8::Isolate* pIsolate,
+    IJS_Runtime* pIRuntime,
+    v8::Global<v8::Context>* pV8PersistentContext,
+    std::vector<v8::Global<v8::Object>*>* pStaticObjects);
+void FXJS_ReleaseRuntime(v8::Isolate* pIsolate,
+                         v8::Global<v8::Context>* pV8PersistentContext,
+                         std::vector<v8::Global<v8::Object>*>* pStaticObjects);
+IJS_Runtime* FXJS_GetRuntimeFromIsolate(v8::Isolate* pIsolate);
+
+#ifdef PDF_ENABLE_XFA
+// Called as part of FXJS_InitializeRuntime, exposed so PDF can make its
+// own contexts compatible with XFA or vice versa.
+void FXJS_SetRuntimeForV8Context(v8::Local<v8::Context> v8Context,
+                                 IJS_Runtime* pIRuntime);
+#endif  // PDF_ENABLE_XFA
+
+// Called after FXJS_InitializeRuntime call made.
+int FXJS_Execute(v8::Isolate* pIsolate,
+                 const CFX_WideString& script,
+                 FXJSErr* perror);
+
+v8::Local<v8::Object> FXJS_NewFxDynamicObj(v8::Isolate* pIsolate,
+                                           IJS_Runtime* pJSContext,
+                                           int nObjDefnID,
+                                           bool bStatic = false);
+v8::Local<v8::Object> FXJS_GetThisObj(v8::Isolate* pIsolate);
+int FXJS_GetObjDefnID(v8::Local<v8::Object> pObj);
+const wchar_t* FXJS_GetTypeof(v8::Local<v8::Value> pObj);
+
+void FXJS_SetPrivate(v8::Isolate* pIsolate,
+                     v8::Local<v8::Object> pObj,
+                     void* p);
+void* FXJS_GetPrivate(v8::Isolate* pIsolate, v8::Local<v8::Object> pObj);
+void FXJS_FreePrivate(void* p);
+void FXJS_FreePrivate(v8::Local<v8::Object> pObj);
+void FXJS_Error(v8::Isolate* isolate, const CFX_WideString& message);
+
+v8::Local<v8::String> FXJS_WSToJSString(v8::Isolate* pIsolate,
+                                        const CFX_WideString& wsPropertyName);
+v8::Local<v8::Value> FXJS_GetObjectElement(v8::Isolate* pIsolate,
+                                           v8::Local<v8::Object> pObj,
+                                           const CFX_WideString& PropertyName);
+v8::Local<v8::Array> FXJS_GetObjectElementNames(v8::Isolate* pIsolate,
+                                                v8::Local<v8::Object> pObj);
+v8::Local<v8::Value> FXJS_GetArrayElement(v8::Isolate* pIsolate,
+                                          v8::Local<v8::Array> pArray,
+                                          unsigned index);
+
+unsigned FXJS_GetArrayLength(v8::Local<v8::Array> pArray);
+void FXJS_PutObjectString(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& wsPropertyName,
+                          const CFX_WideString& wsValue);
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& PropertyName,
+                          int nValue);
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& PropertyName,
+                          float fValue);
+void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& PropertyName,
+                          double dValue);
+void FXJS_PutObjectBoolean(v8::Isolate* pIsolate,
+                           v8::Local<v8::Object> pObj,
+                           const CFX_WideString& PropertyName,
+                           bool bValue);
+void FXJS_PutObjectObject(v8::Isolate* pIsolate,
+                          v8::Local<v8::Object> pObj,
+                          const CFX_WideString& PropertyName,
+                          v8::Local<v8::Object> pPut);
+void FXJS_PutObjectNull(v8::Isolate* pIsolate,
+                        v8::Local<v8::Object> pObj,
+                        const CFX_WideString& PropertyName);
+unsigned FXJS_PutArrayElement(v8::Isolate* pIsolate,
+                              v8::Local<v8::Array> pArray,
+                              unsigned index,
+                              v8::Local<v8::Value> pValue);
+
+v8::Local<v8::Array> FXJS_NewArray(v8::Isolate* pIsolate);
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, int number);
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, double number);
+v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, float number);
+v8::Local<v8::Value> FXJS_NewBoolean(v8::Isolate* pIsolate, bool b);
+v8::Local<v8::Value> FXJS_NewObject(v8::Isolate* pIsolate,
+                                    v8::Local<v8::Object> pObj);
+v8::Local<v8::Value> FXJS_NewObject2(v8::Isolate* pIsolate,
+                                     v8::Local<v8::Array> pObj);
+v8::Local<v8::Value> FXJS_NewString(v8::Isolate* pIsolate, const wchar_t* str);
+v8::Local<v8::Value> FXJS_NewNull();
+v8::Local<v8::Value> FXJS_NewDate(v8::Isolate* pIsolate, double d);
+
+int FXJS_ToInt32(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue);
+bool FXJS_ToBoolean(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue);
+double FXJS_ToNumber(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue);
+v8::Local<v8::Object> FXJS_ToObject(v8::Isolate* pIsolate,
+                                    v8::Local<v8::Value> pValue);
+CFX_WideString FXJS_ToString(v8::Isolate* pIsolate,
+                             v8::Local<v8::Value> pValue);
+v8::Local<v8::Array> FXJS_ToArray(v8::Isolate* pIsolate,
+                                  v8::Local<v8::Value> pValue);
+void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom);
+
+#endif  // FXJS_INCLUDE_FXJS_V8_H_