Re-land "Only place primitive objects on the V8 global template."

This reverts commit 1a35d55dd6b0d1ea1918e2d6a6c25faf599ba168.
Prevent handles from being destructed after v8 is gone.

BUG=pdfium:419
R=ochang@chromium.org

Review URL: https://codereview.chromium.org/1761073006 .

5 files changed, 113 insertions, 187 deletions

diff --git a/fpdfsdk/include/jsapi/fxjs_v8.h b/fpdfsdk/include/jsapi/fxjs_v8.h
index 76373ac4bc..64fa01bd44 100644
--- a/fpdfsdk/include/jsapi/fxjs_v8.h
+++ b/fpdfsdk/include/jsapi/fxjs_v8.h
@@ -188,7 +188,7 @@ void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
                              v8::FunctionCallback pMethodCall);
 void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
                             const wchar_t* sConstName,
-                            v8::Local<v8::Value> pDefault);
+                            v8::FunctionCallback pConstGetter);
 
 // Called after FXJS_Define* calls made.
 void FXJS_InitializeRuntime(
diff --git a/fpdfsdk/src/javascript/Consts.cpp b/fpdfsdk/src/javascript/Consts.cpp
index 132f214d2d..b7cc2d0a46 100644
--- a/fpdfsdk/src/javascript/Consts.cpp
+++ b/fpdfsdk/src/javascript/Consts.cpp
@@ -11,8 +11,6 @@
 #include "fpdfsdk/src/javascript/JS_Object.h"
 #include "fpdfsdk/src/javascript/JS_Value.h"
 
-/* ------------------------------ border ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Border)
 JS_STATIC_CONST_ENTRY_STRING(L"s", L"solid")
 JS_STATIC_CONST_ENTRY_STRING(L"b", L"beveled")
@@ -20,22 +18,16 @@ JS_STATIC_CONST_ENTRY_STRING(L"d", L"dashed")
 JS_STATIC_CONST_ENTRY_STRING(L"i", L"inset")
 JS_STATIC_CONST_ENTRY_STRING(L"u", L"underline")
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Border, border)
 
-/* ------------------------------ display ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Display)
 JS_STATIC_CONST_ENTRY_NUMBER(L"visible", 0)
 JS_STATIC_CONST_ENTRY_NUMBER(L"hidden", 1)
 JS_STATIC_CONST_ENTRY_NUMBER(L"noPrint", 2)
 JS_STATIC_CONST_ENTRY_NUMBER(L"noView", 3)
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Display, display)
 
-/* ------------------------------ font ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Font)
 JS_STATIC_CONST_ENTRY_STRING(L"Times", L"Times-Roman")
 JS_STATIC_CONST_ENTRY_STRING(L"TimesB", L"Times-Bold")
@@ -52,22 +44,16 @@ JS_STATIC_CONST_ENTRY_STRING(L"CourBI", L"Courier-BoldOblique")
 JS_STATIC_CONST_ENTRY_STRING(L"Symbol", L"Symbol")
 JS_STATIC_CONST_ENTRY_STRING(L"ZapfD", L"ZapfDingbats")
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Font, font)
 
-/* ------------------------------ highlight ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Highlight)
 JS_STATIC_CONST_ENTRY_STRING(L"n", L"none")
 JS_STATIC_CONST_ENTRY_STRING(L"i", L"invert")
 JS_STATIC_CONST_ENTRY_STRING(L"p", L"push")
 JS_STATIC_CONST_ENTRY_STRING(L"o", L"outline")
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Highlight, highlight)
 
-/* ------------------------------ position ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Position)
 JS_STATIC_CONST_ENTRY_NUMBER(L"textOnly", 0)
 JS_STATIC_CONST_ENTRY_NUMBER(L"iconOnly", 1)
@@ -77,31 +63,22 @@ JS_STATIC_CONST_ENTRY_NUMBER(L"iconTextH", 4)
 JS_STATIC_CONST_ENTRY_NUMBER(L"textIconH", 5)
 JS_STATIC_CONST_ENTRY_NUMBER(L"overlay", 6)
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Position, position)
 
-/* ------------------------------ scaleHow ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_ScaleHow)
 JS_STATIC_CONST_ENTRY_NUMBER(L"proportional", 0)
 JS_STATIC_CONST_ENTRY_NUMBER(L"anamorphic", 1)
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_ScaleHow, scaleHow)
 
-/* ------------------------------ scaleWhen ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_ScaleWhen)
 JS_STATIC_CONST_ENTRY_NUMBER(L"always", 0)
 JS_STATIC_CONST_ENTRY_NUMBER(L"never", 1)
 JS_STATIC_CONST_ENTRY_NUMBER(L"tooBig", 2)
 JS_STATIC_CONST_ENTRY_NUMBER(L"tooSmall", 3)
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_ScaleWhen, scaleWhen)
 
-/* ------------------------------ style ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Style)
 JS_STATIC_CONST_ENTRY_STRING(L"ch", L"check")
 JS_STATIC_CONST_ENTRY_STRING(L"cr", L"cross")
@@ -110,11 +87,8 @@ JS_STATIC_CONST_ENTRY_STRING(L"ci", L"circle")
 JS_STATIC_CONST_ENTRY_STRING(L"st", L"star")
 JS_STATIC_CONST_ENTRY_STRING(L"sq", L"square")
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Style, style)
 
-/* ------------------------------ zoomtype ------------------------------ */
-
 BEGIN_JS_STATIC_CONST(CJS_Zoomtype)
 JS_STATIC_CONST_ENTRY_STRING(L"none", L"NoVary")
 JS_STATIC_CONST_ENTRY_STRING(L"fitP", L"FitPage")
@@ -124,172 +98,109 @@ JS_STATIC_CONST_ENTRY_STRING(L"fitV", L"FitVisibleWidth")
 JS_STATIC_CONST_ENTRY_STRING(L"pref", L"Preferred")
 JS_STATIC_CONST_ENTRY_STRING(L"refW", L"ReflowWidth")
 END_JS_STATIC_CONST()
-
 IMPLEMENT_JS_CLASS_CONST(CJS_Zoomtype, zoomtype)
 
-/* ------------------------------ CJS_GlobalConsts ------------------------- */
-
-static void DefineGlobalConstString(CJS_Runtime* pRuntime,
-                                    const wchar_t* pConstName,
-                                    const wchar_t* pValue) {
-  FXJS_DefineGlobalConst(pRuntime->GetIsolate(), pConstName,
-                         FXJS_NewString(pRuntime->GetIsolate(), pValue));
-}
+#define GLOBAL_STRING(rt, name, value)                                         \
+  FXJS_DefineGlobalConst(                                                      \
+      (rt)->GetIsolate(), (name),                                              \
+      [](const v8::FunctionCallbackInfo<v8::Value>& info) {                    \
+        info.GetReturnValue().Set(FXJS_NewString(info.GetIsolate(), (value))); \
+      })
 
 void CJS_GlobalConsts::DefineJSObjects(CJS_Runtime* pRuntime) {
-  DefineGlobalConstString(
-      pRuntime, L"IDS_GREATER_THAN",
-      L"Invalid value: must be greater than or equal to % s.");
-  DefineGlobalConstString(
-      pRuntime, L"IDS_GT_AND_LT",
-      L"Invalid value: must be greater than or equal to % s "
-      L"and less than or equal to % s.");
-  DefineGlobalConstString(pRuntime, L"IDS_LESS_THAN",
-                          L"Invalid value: must be less than or equal to % s.");
-  DefineGlobalConstString(pRuntime, L"IDS_INVALID_MONTH", L"**Invalid**");
-  DefineGlobalConstString(
-      pRuntime, L"IDS_INVALID_DATE",
-      L"Invalid date / time: please ensure that the date / time exists.Field");
-  DefineGlobalConstString(
-      pRuntime, L"IDS_INVALID_VALUE",
-      L"The value entered does not match the format of the field");
-  DefineGlobalConstString(pRuntime, L"IDS_AM", L"am");
-  DefineGlobalConstString(pRuntime, L"IDS_PM", L"pm");
-  DefineGlobalConstString(
-      pRuntime, L"IDS_MONTH_INFO",
-      L"January[1] February[2] March[3] April[4] May[5] "
-      L"June[6] July[7] August[8] September[9] October[10] "
-      L"November[11] December[12] Sept[9] Jan[1] Feb[2] Mar[3] "
-      L"Apr[4] Jun[6] Jul[7] Aug[8] Sep[9] Oct[10] Nov[11] "
-      L"Dec[12]");
-  DefineGlobalConstString(pRuntime, L"IDS_STARTUP_CONSOLE_MSG", L"** ^ _ ^ **");
-}
-
-/* ------------------------------ CJS_GlobalArrays  ------------------------ */
+  GLOBAL_STRING(pRuntime, L"IDS_GREATER_THAN",
+                L"Invalid value: must be greater than or equal to % s.");
 
-void DefineGlobalConstStringArray(CJS_Runtime* pRuntime,
-                                  const wchar_t* sConstName,
-                                  const wchar_t** pValues,
-                                  size_t nValues) {
-  CJS_Array array(pRuntime);
-  for (size_t i = 0; i < nValues; ++i) {
-    array.SetElement(i, CJS_Value(pRuntime, pValues[i]));
-  }
-  CJS_PropValue prop(pRuntime);
-  prop << array;
-  FXJS_DefineGlobalConst(pRuntime->GetIsolate(), sConstName, prop.ToV8Value());
-}
-
-void CJS_GlobalArrays::DefineJSObjects(CJS_Runtime* pRuntime) {
-  {
-    const FX_WCHAR* ArrayName = L"RE_NUMBER_ENTRY_DOT_SEP";
-    const FX_WCHAR* ArrayContent[] = {L"[+-]?\\d*\\.?\\d*"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
-
-  {
-    const FX_WCHAR* ArrayName = L"RE_NUMBER_COMMIT_DOT_SEP";
-    const FX_WCHAR* ArrayContent[] = {
-        L"[+-]?\\d+(\\.\\d+)?", /* -1.0 or -1 */
-        L"[+-]?\\.\\d+",        /* -.1 */
-        L"[+-]?\\d+\\."         /* -1. */
-    };
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
-
-  {
-    const FX_WCHAR* ArrayName = L"RE_NUMBER_ENTRY_COMMA_SEP";
-    const FX_WCHAR* ArrayContent[] = {L"[+-]?\\d*,?\\d*"};
-
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
-
-  {
-    const FX_WCHAR* ArrayName = L"RE_NUMBER_COMMIT_COMMA_SEP";
-    const FX_WCHAR* ArrayContent[] = {
-        L"[+-]?\\d+([.,]\\d+)?", /* -1,0 or -1 */
-        L"[+-]?[.,]\\d+",        /* -,1 */
-        L"[+-]?\\d+[.,]"         /* -1, */
-    };
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_GT_AND_LT",
+                L"Invalid value: must be greater than or equal to % s "
+                L"and less than or equal to % s.");
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_ZIP_ENTRY";
-    const FX_WCHAR* ArrayContent[] = {L"\\d{0,5}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
-
-  {
-    const FX_WCHAR* ArrayName = L"RE_ZIP_COMMIT";
-    const FX_WCHAR* ArrayContent[] = {L"\\d{5}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_LESS_THAN",
+                L"Invalid value: must be less than or equal to % s.");
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_ZIP4_ENTRY";
-    const FX_WCHAR* ArrayContent[] = {L"\\d{0,5}(\\.|[- ])?\\d{0,4}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_INVALID_MONTH", L"**Invalid**");
+  GLOBAL_STRING(
+      pRuntime, L"IDS_INVALID_DATE",
+      L"Invalid date / time: please ensure that the date / time exists.Field");
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_ZIP4_COMMIT";
-    const FX_WCHAR* ArrayContent[] = {L"\\d{5}(\\.|[- ])?\\d{4}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_INVALID_VALUE",
+                L"The value entered does not match the format of the field");
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_PHONE_ENTRY";
-    const FX_WCHAR* ArrayContent[] = {
-        L"\\d{0,3}(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",  // 555-1234 or 408
-                                                            // 555-1234
-        L"\\(\\d{0,3}",                                     // (408
-        L"\\(\\d{0,3}\\)(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",  // (408)
-                                                                  // 555-1234
-        // (allow the addition of parens as an afterthought)
-        L"\\(\\d{0,3}(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",  // (408 555-1234
-
-        L"\\d{0,3}\\)(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",  // 408) 555-1234
-
-        L"011(\\.|[- \\d])*"  // international
-    };
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_AM", L"am");
+  GLOBAL_STRING(pRuntime, L"IDS_PM", L"pm");
+  GLOBAL_STRING(pRuntime, L"IDS_MONTH_INFO",
+                L"January[1] February[2] March[3] April[4] May[5] "
+                L"June[6] July[7] August[8] September[9] October[10] "
+                L"November[11] December[12] Sept[9] Jan[1] Feb[2] Mar[3] "
+                L"Apr[4] Jun[6] Jul[7] Aug[8] Sep[9] Oct[10] Nov[11] "
+                L"Dec[12]");
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_PHONE_COMMIT";
-    const FX_WCHAR* ArrayContent[] = {
-        L"\\d{3}(\\.|[- ])?\\d{4}",                         // 555-1234
-        L"\\d{3}(\\.|[- ])?\\d{3}(\\.|[- ])?\\d{4}",        // 408 555-1234
-        L"\\(\\d{3}\\)(\\.|[- ])?\\d{3}(\\.|[- ])?\\d{4}",  // (408) 555-1234
-        L"011(\\.|[- \\d])*"                                // international
-    };
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+  GLOBAL_STRING(pRuntime, L"IDS_STARTUP_CONSOLE_MSG", L"** ^ _ ^ **");
+}
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_SSN_ENTRY";
-    const FX_WCHAR* ArrayContent[] = {
-        L"\\d{0,3}(\\.|[- ])?\\d{0,2}(\\.|[- ])?\\d{0,4}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
+#define GLOBAL_ARRAY(rt, name, ...)                                   \
+  {                                                                   \
+    const FX_WCHAR* values[] = {__VA_ARGS__};                         \
+    v8::Local<v8::Array> array = FXJS_NewArray((rt)->GetIsolate());   \
+    for (size_t i = 0; i < FX_ArraySize(values); ++i)                 \
+      array->Set(i, FXJS_NewString((rt)->GetIsolate(), values[i]));   \
+    rt->SetConstArray(name, array);                                   \
+    FXJS_DefineGlobalConst(                                           \
+        (rt)->GetIsolate(), (name),                                   \
+        [](const v8::FunctionCallbackInfo<v8::Value>& info) {         \
+          CJS_Runtime* pRuntime = static_cast<CJS_Runtime*>(          \
+              FXJS_GetRuntimeFromIsolate(info.GetIsolate()));         \
+          if (pRuntime)                                               \
+            info.GetReturnValue().Set(pRuntime->GetConstArray(name)); \
+        });                                                           \
   }
 
-  {
-    const FX_WCHAR* ArrayName = L"RE_SSN_COMMIT";
-    const FX_WCHAR* ArrayContent[] = {
-        L"\\d{3}(\\.|[- ])?\\d{2}(\\.|[- ])?\\d{4}"};
-    DefineGlobalConstStringArray(pRuntime, ArrayName, ArrayContent,
-                                 FX_ArraySize(ArrayContent));
-  }
+void CJS_GlobalArrays::DefineJSObjects(CJS_Runtime* pRuntime) {
+  GLOBAL_ARRAY(pRuntime, L"RE_NUMBER_ENTRY_DOT_SEP", L"[+-]?\\d*\\.?\\d*");
+  GLOBAL_ARRAY(pRuntime, L"RE_NUMBER_COMMIT_DOT_SEP",
+               L"[+-]?\\d+(\\.\\d+)?",  // -1.0 or -1
+               L"[+-]?\\.\\d+",         // -.1
+               L"[+-]?\\d+\\.");        // -1.
+
+  GLOBAL_ARRAY(pRuntime, L"RE_NUMBER_ENTRY_COMMA_SEP", L"[+-]?\\d*,?\\d*");
+  GLOBAL_ARRAY(pRuntime, L"RE_NUMBER_COMMIT_COMMA_SEP",
+               L"[+-]?\\d+([.,]\\d+)?",  // -1,0 or -1
+               L"[+-]?[.,]\\d+",         // -,1
+               L"[+-]?\\d+[.,]");        // -1,
+
+  GLOBAL_ARRAY(pRuntime, L"RE_ZIP_ENTRY", L"\\d{0,5}");
+  GLOBAL_ARRAY(pRuntime, L"RE_ZIP_COMMIT", L"\\d{5}");
+  GLOBAL_ARRAY(pRuntime, L"RE_ZIP4_ENTRY", L"\\d{0,5}(\\.|[- ])?\\d{0,4}");
+  GLOBAL_ARRAY(pRuntime, L"RE_ZIP4_COMMIT", L"\\d{5}(\\.|[- ])?\\d{4}");
+  GLOBAL_ARRAY(pRuntime, L"RE_PHONE_ENTRY",
+               // 555-1234 or 408 555-1234
+               L"\\d{0,3}(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",
+
+               // (408
+               L"\\(\\d{0,3}",
+
+               // (408) 555-1234
+               // (allow the addition of parens as an afterthought)
+               L"\\(\\d{0,3}\\)(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",
+
+               // (408 555-1234
+               L"\\(\\d{0,3}(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",
+
+               // 408) 555-1234
+               L"\\d{0,3}\\)(\\.|[- ])?\\d{0,3}(\\.|[- ])?\\d{0,4}",
+
+               // international
+               L"011(\\.|[- \\d])*");
+
+  GLOBAL_ARRAY(
+      pRuntime, L"RE_PHONE_COMMIT", L"\\d{3}(\\.|[- ])?\\d{4}",  // 555-1234
+      L"\\d{3}(\\.|[- ])?\\d{3}(\\.|[- ])?\\d{4}",               // 408 555-1234
+      L"\\(\\d{3}\\)(\\.|[- ])?\\d{3}(\\.|[- ])?\\d{4}",  // (408) 555-1234
+      L"011(\\.|[- \\d])*");                              // international
+
+  GLOBAL_ARRAY(pRuntime, L"RE_SSN_ENTRY",
+               L"\\d{0,3}(\\.|[- ])?\\d{0,2}(\\.|[- ])?\\d{0,4}");
+
+  GLOBAL_ARRAY(pRuntime, L"RE_SSN_COMMIT",
+               L"\\d{3}(\\.|[- ])?\\d{2}(\\.|[- ])?\\d{4}");
 }
diff --git a/fpdfsdk/src/javascript/JS_Runtime.cpp b/fpdfsdk/src/javascript/JS_Runtime.cpp
index 76221db3f2..88696e5110 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.cpp
+++ b/fpdfsdk/src/javascript/JS_Runtime.cpp
@@ -121,6 +121,7 @@ CJS_Runtime::~CJS_Runtime() {
     delete m_ContextArray.GetAt(i);
 
   m_ContextArray.RemoveAll();
+  m_ConstArrays.clear();
   FXJS_ReleaseRuntime(GetIsolate(), &m_context, &m_StaticObjects);
 
   m_pApp = NULL;
@@ -256,6 +257,15 @@ v8::Local<v8::Context> CJS_Runtime::NewJSContext() {
   return v8::Local<v8::Context>::New(m_isolate, m_context);
 }
 
+void CJS_Runtime::SetConstArray(const CFX_WideString& name,
+                                v8::Local<v8::Array> array) {
+  m_ConstArrays[name] = v8::Global<v8::Array>(m_isolate, array);
+}
+
+v8::Local<v8::Array> CJS_Runtime::GetConstArray(const CFX_WideString& name) {
+  return v8::Local<v8::Array>::New(m_isolate, m_ConstArrays[name]);
+}
+
 #ifdef PDF_ENABLE_XFA
 CFX_WideString ChangeObjName(const CFX_WideString& str) {
   CFX_WideString sRet = str;
diff --git a/fpdfsdk/src/javascript/JS_Runtime.h b/fpdfsdk/src/javascript/JS_Runtime.h
index 6fc3894f44..8215b88994 100644
--- a/fpdfsdk/src/javascript/JS_Runtime.h
+++ b/fpdfsdk/src/javascript/JS_Runtime.h
@@ -58,6 +58,9 @@ class CJS_Runtime : public IJS_Runtime {
   v8::Isolate* GetIsolate() const { return m_isolate; }
   v8::Local<v8::Context> NewJSContext();
 
+  void SetConstArray(const CFX_WideString& name, v8::Local<v8::Array> array);
+  v8::Local<v8::Array> GetConstArray(const CFX_WideString& name);
+
 #ifdef PDF_ENABLE_XFA
   FX_BOOL GetHValueByName(const CFX_ByteStringC& utf8Name,
                           FXJSE_HVALUE hValue) override;
@@ -80,6 +83,7 @@ class CJS_Runtime : public IJS_Runtime {
   bool m_isolateManaged;
   v8::Global<v8::Context> m_context;
   std::vector<v8::Global<v8::Object>*> m_StaticObjects;
+  std::map<CFX_WideString, v8::Global<v8::Array>> m_ConstArrays;
   std::set<Observer*> m_observers;
 };
 
diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index f015f87136..5631ab6258 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -287,14 +287,15 @@ void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
 
 void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
                             const wchar_t* sConstName,
-                            v8::Local<v8::Value> pDefault) {
+                            v8::FunctionCallback pConstGetter) {
   v8::Isolate::Scope isolate_scope(pIsolate);
   v8::HandleScope handle_scope(pIsolate);
   CFX_ByteString bsConst = CFX_WideString(sConstName).UTF8Encode();
-  GetGlobalObjectTemplate(pIsolate)->Set(
-      v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
-                              v8::NewStringType::kNormal).ToLocalChecked(),
-      pDefault, v8::ReadOnly);
+  GetGlobalObjectTemplate(pIsolate)
+      ->SetAccessorProperty(v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
+                                                    v8::NewStringType::kNormal)
+                                .ToLocalChecked(),
+                            v8::FunctionTemplate::New(pIsolate, pConstGetter));
 }
 
 void FXJS_InitializeRuntime(