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1 // Copyright 2014 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 #ifndef FXJS_XFA_CFXJSE_ENGINE_H_
8 #define FXJS_XFA_CFXJSE_ENGINE_H_
9 
10 #include <map>
11 #include <memory>
12 #include <vector>
13 
14 #include "core/fxcrt/unowned_ptr.h"
15 #include "fxjs/cfx_v8.h"
16 #include "v8/include/v8.h"
17 #include "xfa/fxfa/cxfa_eventparam.h"
18 #include "xfa/fxfa/parser/cxfa_document.h"
19 #include "xfa/fxfa/parser/cxfa_script.h"
20 #include "xfa/fxfa/parser/xfa_resolvenode_rs.h"
21 
22 class CFXJSE_Class;
23 class CFXJSE_Context;
24 class CFXJSE_FormCalcContext;
25 class CFXJSE_ResolveProcessor;
26 class CJS_Runtime;
27 class CXFA_List;
28 
29 // Flags for |dwStyles| argument to CFXJSE_Engine::ResolveObjects().
30 #define XFA_RESOLVENODE_Children 0x0001
31 #define XFA_RESOLVENODE_TagName 0x0002
32 #define XFA_RESOLVENODE_Attributes 0x0004
33 #define XFA_RESOLVENODE_Properties 0x0008
34 #define XFA_RESOLVENODE_Siblings 0x0020
35 #define XFA_RESOLVENODE_Parent 0x0040
36 #define XFA_RESOLVENODE_AnyChild 0x0080
37 #define XFA_RESOLVENODE_ALL 0x0100
38 #define XFA_RESOLVENODE_CreateNode 0x0400
39 #define XFA_RESOLVENODE_Bind 0x0800
40 #define XFA_RESOLVENODE_BindNew 0x1000
41 
42 class CFXJSE_Engine final : public CFX_V8 {
43  public:
44   static CXFA_Object* ToObject(const v8::FunctionCallbackInfo<v8::Value>& info);
45   static CXFA_Object* ToObject(CFXJSE_Value* pValue);
46   static void GlobalPropertyGetter(CFXJSE_Value* pObject,
47                                    ByteStringView szPropName,
48                                    CFXJSE_Value* pValue);
49   static void GlobalPropertySetter(CFXJSE_Value* pObject,
50                                    ByteStringView szPropName,
51                                    CFXJSE_Value* pValue);
52   static void NormalPropertyGetter(CFXJSE_Value* pObject,
53                                    ByteStringView szPropName,
54                                    CFXJSE_Value* pValue);
55   static void NormalPropertySetter(CFXJSE_Value* pObject,
56                                    ByteStringView szPropName,
57                                    CFXJSE_Value* pValue);
58   static CJS_Result NormalMethodCall(
59       const v8::FunctionCallbackInfo<v8::Value>& info,
60       const WideString& functionName);
61   static int32_t NormalPropTypeGetter(CFXJSE_Value* pObject,
62                                       ByteStringView szPropName,
63                                       bool bQueryIn);
64   static int32_t GlobalPropTypeGetter(CFXJSE_Value* pObject,
65                                       ByteStringView szPropName,
66                                       bool bQueryIn);
67 
68   CFXJSE_Engine(CXFA_Document* pDocument, CJS_Runtime* fxjs_runtime);
69   ~CFXJSE_Engine() override;
70 
SetEventParam(CXFA_EventParam * param)71   void SetEventParam(CXFA_EventParam* param) { m_eventParam = param; }
GetEventParam()72   CXFA_EventParam* GetEventParam() const { return m_eventParam.Get(); }
73   bool RunScript(CXFA_Script::Type eScriptType,
74                  WideStringView wsScript,
75                  CFXJSE_Value* pRetValue,
76                  CXFA_Object* pThisObject);
77 
78   bool ResolveObjects(CXFA_Object* refObject,
79                       WideStringView wsExpression,
80                       XFA_RESOLVENODE_RS* resolveNodeRS,
81                       uint32_t dwStyles,
82                       CXFA_Node* bindNode);
83 
84   CFXJSE_Value* GetOrCreateJSBindingFromMap(CXFA_Object* pObject);
85   void RemoveJSBindingFromMap(CXFA_Object* pObject);
86 
87   void AddToCacheList(std::unique_ptr<CXFA_List> pList);
GetThisObject()88   CXFA_Object* GetThisObject() const { return m_pThisObject.Get(); }
89 
90   void SetNodesOfRunScript(std::vector<CXFA_Node*>* pArray);
91   void AddNodesOfRunScript(CXFA_Node* pNode);
GetJseNormalClass()92   CFXJSE_Class* GetJseNormalClass() const { return m_pJsClass.Get(); }
93 
SetRunAtType(XFA_AttributeValue eRunAt)94   void SetRunAtType(XFA_AttributeValue eRunAt) { m_eRunAtType = eRunAt; }
IsRunAtClient()95   bool IsRunAtClient() { return m_eRunAtType != XFA_AttributeValue::Server; }
96 
97   CXFA_Script::Type GetType();
GetUpObjectArray()98   std::vector<CXFA_Node*>* GetUpObjectArray() { return &m_upObjectArray; }
GetDocument()99   CXFA_Document* GetDocument() const { return m_pDocument.Get(); }
100 
101   CXFA_Object* ToXFAObject(v8::Local<v8::Value> obj);
102   v8::Local<v8::Value> NewXFAObject(CXFA_Object* obj,
103                                     v8::Global<v8::FunctionTemplate>& tmpl);
104 
105  private:
106   CFXJSE_Context* CreateVariablesContext(CXFA_Node* pScriptNode,
107                                          CXFA_Node* pSubform);
108   void RemoveBuiltInObjs(CFXJSE_Context* pContext) const;
109   bool QueryNodeByFlag(CXFA_Node* refNode,
110                        WideStringView propname,
111                        CFXJSE_Value* pValue,
112                        uint32_t dwFlag,
113                        bool bSetting);
114   bool IsStrictScopeInJavaScript();
115   CXFA_Object* GetVariablesThis(CXFA_Object* pObject, bool bScriptNode);
116   bool QueryVariableValue(CXFA_Node* pScriptNode,
117                           ByteStringView szPropName,
118                           CFXJSE_Value* pValue,
119                           bool bGetter);
120   bool RunVariablesScript(CXFA_Node* pScriptNode);
121 
122   UnownedPtr<CJS_Runtime> const m_pSubordinateRuntime;
123   UnownedPtr<CXFA_Document> const m_pDocument;
124   std::unique_ptr<CFXJSE_Context> m_JsContext;
125   UnownedPtr<CFXJSE_Class> m_pJsClass;
126   CXFA_Script::Type m_eScriptType = CXFA_Script::Type::Unknown;
127   std::map<CXFA_Object*, std::unique_ptr<CFXJSE_Value>> m_mapObjectToValue;
128   std::map<CXFA_Object*, std::unique_ptr<CFXJSE_Context>>
129       m_mapVariableToContext;
130   UnownedPtr<CXFA_EventParam> m_eventParam;
131   std::vector<CXFA_Node*> m_upObjectArray;
132   // CacheList holds the List items so we can clean them up when we're done.
133   std::vector<std::unique_ptr<CXFA_List>> m_CacheList;
134   UnownedPtr<std::vector<CXFA_Node*>> m_pScriptNodeArray;
135   std::unique_ptr<CFXJSE_ResolveProcessor> const m_ResolveProcessor;
136   std::unique_ptr<CFXJSE_FormCalcContext> m_FM2JSContext;
137   UnownedPtr<CXFA_Object> m_pThisObject;
138   XFA_AttributeValue m_eRunAtType = XFA_AttributeValue::Client;
139 };
140 
141 #endif  //  FXJS_XFA_CFXJSE_ENGINE_H_
142