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// Copyright 2014 The PDFium Authors
// 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
#ifndef FXJS_XFA_CFXJSE_ENGINE_H_
#define FXJS_XFA_CFXJSE_ENGINE_H_
#include <map>
#include <memory>
#include <type_traits>
#include <vector>
#include "core/fxcrt/mask.h"
#include "core/fxcrt/unowned_ptr.h"
#include "fxjs/cfx_v8.h"
#include "v8/include/cppgc/persistent.h"
#include "v8/include/v8-forward.h"
#include "v8/include/v8-persistent-handle.h"
#include "xfa/fxfa/cxfa_eventparam.h"
#include "xfa/fxfa/parser/cxfa_document.h"
#include "xfa/fxfa/parser/cxfa_script.h"
#include "xfa/fxfa/parser/xfa_basic_data.h"
class CFXJSE_Class;
class CFXJSE_Context;
class CFXJSE_FormCalcContext;
class CFXJSE_HostObject;
class CFXJSE_NodeHelper;
class CFXJSE_ResolveProcessor;
class CFXJSE_Value;
class CJS_Runtime;
enum class XFA_ResolveFlag : uint16_t {
kChildren = 1 << 0,
kTagName = 1 << 1,
kAttributes = 1 << 2,
kProperties = 1 << 3,
kSiblings = 1 << 5,
kParent = 1 << 6,
kAnyChild = 1 << 7,
kALL = 1 << 8,
kCreateNode = 1 << 10,
kBind = 1 << 11,
kBindNew = 1 << 12,
};
class CFXJSE_Engine final : public CFX_V8 {
public:
class ResolveResult {
CPPGC_STACK_ALLOCATED(); // Allow raw/unowned pointers.
public:
enum class Type {
kNodes = 0,
kAttribute,
kCreateNodeOne,
kCreateNodeAll,
kCreateNodeMidAll,
kExistNodes,
};
ResolveResult();
ResolveResult(const ResolveResult& that);
ResolveResult& operator=(const ResolveResult& that);
~ResolveResult();
Type type = Type::kNodes;
XFA_SCRIPTATTRIBUTEINFO script_attribute = {};
// Vector of Member would be correct for stack-based vectors, if
// STL worked with cppgc.
std::vector<cppgc::Member<CXFA_Object>> objects;
};
static CXFA_Object* ToObject(const v8::FunctionCallbackInfo<v8::Value>& info);
static CXFA_Object* ToObject(v8::Isolate* pIsolate,
v8::Local<v8::Value> value);
static CXFA_Object* ToObject(v8::Isolate* pIsolate, CFXJSE_Value* pValue);
static CXFA_Object* ToObject(CFXJSE_HostObject* pHostObj);
static v8::Local<v8::Value> GlobalPropertyGetter(
v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName);
static void GlobalPropertySetter(v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName,
v8::Local<v8::Value> pValue);
static v8::Local<v8::Value> NormalPropertyGetter(
v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName);
static void NormalPropertySetter(v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName,
v8::Local<v8::Value> pValue);
static CJS_Result NormalMethodCall(
const v8::FunctionCallbackInfo<v8::Value>& info,
const WideString& functionName);
static FXJSE_ClassPropType NormalPropTypeGetter(v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName,
bool bQueryIn);
static FXJSE_ClassPropType GlobalPropTypeGetter(v8::Isolate* pIsolate,
v8::Local<v8::Object> pObject,
ByteStringView szPropName,
bool bQueryIn);
CFXJSE_Engine(CXFA_Document* pDocument, CJS_Runtime* fxjs_runtime);
~CFXJSE_Engine() override;
class EventParamScope {
CPPGC_STACK_ALLOCATED();
public:
EventParamScope(CFXJSE_Engine* pEngine,
CXFA_Node* pTarget,
CXFA_EventParam* pEventParam);
~EventParamScope();
private:
UnownedPtr<CFXJSE_Engine> m_pEngine;
UnownedPtr<CXFA_Node> m_pPrevTarget;
UnownedPtr<CXFA_EventParam> m_pPrevEventParam;
};
friend class EventParamScope;
CXFA_Node* GetEventTarget() const { return m_pTarget; }
CXFA_EventParam* GetEventParam() const { return m_eventParam; }
bool RunScript(CXFA_Script::Type eScriptType,
WideStringView wsScript,
CFXJSE_Value* pRetValue,
CXFA_Object* pThisObject);
absl::optional<ResolveResult> ResolveObjects(CXFA_Object* refObject,
WideStringView wsExpression,
Mask<XFA_ResolveFlag> dwStyles);
absl::optional<ResolveResult> ResolveObjectsWithBindNode(
CXFA_Object* refObject,
WideStringView wsExpression,
Mask<XFA_ResolveFlag> dwStyles,
CXFA_Node* bindNode);
v8::Local<v8::Object> GetOrCreateJSBindingFromMap(CXFA_Object* pObject);
CXFA_Object* GetThisObject() const { return m_pThisObject; }
CFXJSE_Class* GetJseNormalClass() const { return m_pJsClass; }
CXFA_Document* GetDocument() const { return m_pDocument.Get(); }
void SetNodesOfRunScript(std::vector<cppgc::Persistent<CXFA_Node>>* pArray);
void AddNodesOfRunScript(CXFA_Node* pNode);
void SetRunAtType(XFA_AttributeValue eRunAt) { m_eRunAtType = eRunAt; }
bool IsRunAtClient() { return m_eRunAtType != XFA_AttributeValue::Server; }
CXFA_Script::Type GetType();
void AddObjectToUpArray(CXFA_Node* pNode);
CXFA_Node* LastObjectFromUpArray();
CXFA_Object* ToXFAObject(v8::Local<v8::Value> obj);
v8::Local<v8::Object> NewNormalXFAObject(CXFA_Object* obj);
bool IsResolvingNodes() const { return m_bResolvingNodes; }
CFXJSE_Context* GetJseContextForTest() const { return GetJseContext(); }
private:
CFXJSE_Context* GetJseContext() const { return m_JsContext.get(); }
CFXJSE_Context* CreateVariablesContext(CXFA_Script* pScriptNode,
CXFA_Node* pSubform);
void RemoveBuiltInObjs(CFXJSE_Context* pContext);
bool QueryNodeByFlag(CXFA_Node* refNode,
WideStringView propname,
v8::Local<v8::Value>* pValue,
Mask<XFA_ResolveFlag> dwFlag);
bool UpdateNodeByFlag(CXFA_Node* refNode,
WideStringView propname,
v8::Local<v8::Value> pValue,
Mask<XFA_ResolveFlag> dwFlag);
bool IsStrictScopeInJavaScript();
CXFA_Object* GetVariablesThis(CXFA_Object* pObject);
CXFA_Object* GetVariablesScript(CXFA_Object* pObject);
CFXJSE_Context* VariablesContextForScriptNode(CXFA_Script* pScriptNode);
bool QueryVariableValue(CXFA_Script* pScriptNode,
ByteStringView szPropName,
v8::Local<v8::Value>* pValue);
bool UpdateVariableValue(CXFA_Script* pScriptNode,
ByteStringView szPropName,
v8::Local<v8::Value> pValue);
void RunVariablesScript(CXFA_Script* pScriptNode);
UnownedPtr<CJS_Runtime> const m_pSubordinateRuntime;
cppgc::WeakPersistent<CXFA_Document> const m_pDocument;
std::unique_ptr<CFXJSE_Context> m_JsContext;
UnownedPtr<CFXJSE_Class> m_pJsClass;
CXFA_Script::Type m_eScriptType = CXFA_Script::Type::Unknown;
// |m_mapObjectToValue| is what ensures the v8 object bound to a
// CJX_Object remains valid for the lifetime of the engine.
std::map<cppgc::Persistent<CJX_Object>, v8::Global<v8::Object>>
m_mapObjectToObject;
std::map<cppgc::Persistent<CJX_Object>, std::unique_ptr<CFXJSE_Context>>
m_mapVariableToContext;
cppgc::Persistent<CXFA_Node> m_pTarget;
UnownedPtr<CXFA_EventParam> m_eventParam;
std::vector<cppgc::Persistent<CXFA_Node>> m_upObjectArray;
UnownedPtr<std::vector<cppgc::Persistent<CXFA_Node>>> m_pScriptNodeArray;
std::unique_ptr<CFXJSE_NodeHelper> const m_NodeHelper;
std::unique_ptr<CFXJSE_ResolveProcessor> const m_ResolveProcessor;
std::unique_ptr<CFXJSE_FormCalcContext> m_FormCalcContext;
cppgc::Persistent<CXFA_Object> m_pThisObject;
XFA_AttributeValue m_eRunAtType = XFA_AttributeValue::Client;
bool m_bResolvingNodes = false;
};
#endif // FXJS_XFA_CFXJSE_ENGINE_H_
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