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// 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 "xfa/fxjse/context.h"
#include "xfa/fxjse/class.h"
#include "xfa/fxjse/scope_inline.h"
#include "xfa/fxjse/value.h"
namespace {
const FX_CHAR szCompatibleModeScript[] =
"(function(global, list) {\n"
" 'use strict';\n"
" var objname;\n"
" for (objname in list) {\n"
" var globalobj = global[objname];\n"
" if (globalobj) {\n"
" list[objname].forEach(function(name) {\n"
" if (!globalobj[name]) {\n"
" Object.defineProperty(globalobj, name, {\n"
" writable: true,\n"
" enumerable: false,\n"
" value: (function(obj) {\n"
" if (arguments.length === 0) {\n"
" throw new TypeError('missing argument 0 when calling "
" function ' + objname + '.' + name);\n"
" }\n"
" return globalobj.prototype[name].apply(obj, "
" Array.prototype.slice.call(arguments, 1));\n"
" })\n"
" });\n"
" }\n"
" });\n"
" }\n"
" }\n"
"}(this, {String: ['substr', 'toUpperCase']}));";
} // namespace
v8::Local<v8::Object> FXJSE_GetGlobalObjectFromContext(
const v8::Local<v8::Context>& hContext) {
return hContext->Global()->GetPrototype().As<v8::Object>();
}
void FXJSE_UpdateObjectBinding(v8::Local<v8::Object>& hObject,
CFXJSE_HostObject* lpNewBinding) {
ASSERT(!hObject.IsEmpty());
ASSERT(hObject->InternalFieldCount() > 0);
hObject->SetAlignedPointerInInternalField(0,
static_cast<void*>(lpNewBinding));
}
CFXJSE_HostObject* FXJSE_RetrieveObjectBinding(
const v8::Local<v8::Object>& hJSObject,
CFXJSE_Class* lpClass) {
ASSERT(!hJSObject.IsEmpty());
if (!hJSObject->IsObject()) {
return nullptr;
}
v8::Local<v8::Object> hObject = hJSObject;
if (hObject->InternalFieldCount() == 0) {
v8::Local<v8::Value> hProtoObject = hObject->GetPrototype();
if (hProtoObject.IsEmpty() || !hProtoObject->IsObject()) {
return nullptr;
}
hObject = hProtoObject.As<v8::Object>();
if (hObject->InternalFieldCount() == 0) {
return nullptr;
}
}
if (lpClass) {
v8::Local<v8::FunctionTemplate> hClass =
v8::Local<v8::FunctionTemplate>::New(
lpClass->GetContext()->GetRuntime(), lpClass->GetTemplate());
if (!hClass->HasInstance(hObject)) {
return nullptr;
}
}
return static_cast<CFXJSE_HostObject*>(
hObject->GetAlignedPointerFromInternalField(0));
}
v8::Local<v8::Object> FXJSE_CreateReturnValue(v8::Isolate* pIsolate,
v8::TryCatch& trycatch) {
v8::Local<v8::Object> hReturnValue = v8::Object::New(pIsolate);
if (trycatch.HasCaught()) {
v8::Local<v8::Value> hException = trycatch.Exception();
v8::Local<v8::Message> hMessage = trycatch.Message();
if (hException->IsObject()) {
v8::Local<v8::Value> hValue;
hValue = hException.As<v8::Object>()->Get(
v8::String::NewFromUtf8(pIsolate, "name"));
if (hValue->IsString() || hValue->IsStringObject()) {
hReturnValue->Set(0, hValue);
} else {
hReturnValue->Set(0, v8::String::NewFromUtf8(pIsolate, "Error"));
}
hValue = hException.As<v8::Object>()->Get(
v8::String::NewFromUtf8(pIsolate, "message"));
if (hValue->IsString() || hValue->IsStringObject()) {
hReturnValue->Set(1, hValue);
} else {
hReturnValue->Set(1, hMessage->Get());
}
} else {
hReturnValue->Set(0, v8::String::NewFromUtf8(pIsolate, "Error"));
hReturnValue->Set(1, hMessage->Get());
}
hReturnValue->Set(2, hException);
hReturnValue->Set(3, v8::Integer::New(pIsolate, hMessage->GetLineNumber()));
hReturnValue->Set(4, hMessage->GetSourceLine());
v8::Maybe<int32_t> maybe_int =
hMessage->GetStartColumn(pIsolate->GetCurrentContext());
hReturnValue->Set(5, v8::Integer::New(pIsolate, maybe_int.FromMaybe(0)));
maybe_int = hMessage->GetEndColumn(pIsolate->GetCurrentContext());
hReturnValue->Set(6, v8::Integer::New(pIsolate, maybe_int.FromMaybe(0)));
}
return hReturnValue;
}
CFXJSE_Context* CFXJSE_Context::Create(
v8::Isolate* pIsolate,
const FXJSE_CLASS_DESCRIPTOR* lpGlobalClass,
CFXJSE_HostObject* lpGlobalObject) {
CFXJSE_ScopeUtil_IsolateHandle scope(pIsolate);
CFXJSE_Context* pContext = new CFXJSE_Context(pIsolate);
CFXJSE_Class* lpGlobalClassObj = NULL;
v8::Local<v8::ObjectTemplate> hObjectTemplate;
if (lpGlobalClass) {
lpGlobalClassObj = CFXJSE_Class::Create(pContext, lpGlobalClass, TRUE);
ASSERT(lpGlobalClassObj);
v8::Local<v8::FunctionTemplate> hFunctionTemplate =
v8::Local<v8::FunctionTemplate>::New(pIsolate,
lpGlobalClassObj->m_hTemplate);
hObjectTemplate = hFunctionTemplate->InstanceTemplate();
} else {
hObjectTemplate = v8::ObjectTemplate::New(pIsolate);
hObjectTemplate->SetInternalFieldCount(1);
}
v8::Local<v8::Context> hNewContext =
v8::Context::New(pIsolate, NULL, hObjectTemplate);
v8::Local<v8::Context> hRootContext = v8::Local<v8::Context>::New(
pIsolate, CFXJSE_RuntimeData::Get(pIsolate)->m_hRootContext);
hNewContext->SetSecurityToken(hRootContext->GetSecurityToken());
v8::Local<v8::Object> hGlobalObject =
FXJSE_GetGlobalObjectFromContext(hNewContext);
FXJSE_UpdateObjectBinding(hGlobalObject, lpGlobalObject);
pContext->m_hContext.Reset(pIsolate, hNewContext);
return pContext;
}
CFXJSE_Context::CFXJSE_Context(v8::Isolate* pIsolate) : m_pIsolate(pIsolate) {}
CFXJSE_Context::~CFXJSE_Context() {}
void CFXJSE_Context::GetGlobalObject(CFXJSE_Value* pValue) {
ASSERT(pValue);
CFXJSE_ScopeUtil_IsolateHandleContext scope(this);
v8::Local<v8::Context> hContext =
v8::Local<v8::Context>::New(m_pIsolate, m_hContext);
v8::Local<v8::Object> hGlobalObject = hContext->Global();
pValue->ForceSetValue(hGlobalObject);
}
void CFXJSE_Context::EnableCompatibleMode() {
ExecuteScript(szCompatibleModeScript, nullptr, nullptr);
}
FX_BOOL CFXJSE_Context::ExecuteScript(const FX_CHAR* szScript,
CFXJSE_Value* lpRetValue,
CFXJSE_Value* lpNewThisObject) {
CFXJSE_ScopeUtil_IsolateHandleContext scope(this);
v8::TryCatch trycatch(m_pIsolate);
v8::Local<v8::String> hScriptString =
v8::String::NewFromUtf8(m_pIsolate, szScript);
if (lpNewThisObject == NULL) {
v8::Local<v8::Script> hScript = v8::Script::Compile(hScriptString);
if (!trycatch.HasCaught()) {
v8::Local<v8::Value> hValue = hScript->Run();
if (!trycatch.HasCaught()) {
if (lpRetValue) {
lpRetValue->m_hValue.Reset(m_pIsolate, hValue);
}
return TRUE;
}
}
if (lpRetValue) {
lpRetValue->m_hValue.Reset(m_pIsolate,
FXJSE_CreateReturnValue(m_pIsolate, trycatch));
}
return FALSE;
} else {
v8::Local<v8::Value> hNewThis =
v8::Local<v8::Value>::New(m_pIsolate, lpNewThisObject->m_hValue);
ASSERT(!hNewThis.IsEmpty());
v8::Local<v8::Script> hWrapper =
v8::Script::Compile(v8::String::NewFromUtf8(
m_pIsolate, "(function () { return eval(arguments[0]); })"));
v8::Local<v8::Value> hWrapperValue = hWrapper->Run();
ASSERT(hWrapperValue->IsFunction());
v8::Local<v8::Function> hWrapperFn = hWrapperValue.As<v8::Function>();
if (!trycatch.HasCaught()) {
v8::Local<v8::Value> rgArgs[] = {hScriptString};
v8::Local<v8::Value> hValue =
hWrapperFn->Call(hNewThis.As<v8::Object>(), 1, rgArgs);
if (!trycatch.HasCaught()) {
if (lpRetValue) {
lpRetValue->m_hValue.Reset(m_pIsolate, hValue);
}
return TRUE;
}
}
if (lpRetValue) {
lpRetValue->m_hValue.Reset(m_pIsolate,
FXJSE_CreateReturnValue(m_pIsolate, trycatch));
}
return FALSE;
}
}
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