[xfa] Get properties from the non-xfa global if possible

When script variables are used the methods are set on the non-xfa global
object. This CL updates the NormalPropertyGetter to check the non-xfa
global object for methods which allows the variables methods to be
found.

Bug: pdfium:1097
Change-Id: I13d9d49ad654cad776883aef74de6250de5e756b
Reviewed-on: https://pdfium-review.googlesource.com/33433
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

2 files changed, 26 insertions, 6 deletions

diff --git a/fxjs/cfxjse_engine.cpp b/fxjs/cfxjse_engine.cpp
index 6c8830923f..e894d51de4 100644
--- a/fxjs/cfxjse_engine.cpp
+++ b/fxjs/cfxjse_engine.cpp
@@ -216,6 +216,7 @@ void CFXJSE_Engine::GlobalPropertyGetter(CFXJSE_Value* pObject,
   CXFA_Document* pDoc = pOriginalObject->GetDocument();
   CFXJSE_Engine* lpScriptContext = pDoc->GetScriptContext();
   WideString wsPropName = WideString::FromUTF8(szPropName);
+
   if (lpScriptContext->GetType() == CXFA_Script::Type::Formcalc) {
     if (szPropName == kFormCalcRuntime) {
       lpScriptContext->m_FM2JSContext->GlobalPropertyGetter(pValue);
@@ -339,7 +340,20 @@ void CFXJSE_Engine::NormalPropertyGetter(CFXJSE_Value* pOriginalValue,
         return;
       }
     }
+
+    CXFA_FFNotify* pNotify = pObject->GetDocument()->GetNotify();
+    if (!pNotify) {
+      pReturnValue->SetUndefined();
+      return;
+    }
+
+    CXFA_FFDoc* hDoc = pNotify->GetHDOC();
+    if (hDoc->GetDocEnvironment()->GetPropertyFromNonXFAGlobalObject(
+            hDoc, szPropName, pReturnValue)) {
+      return;
+    }
   }
+
   if (!bRet)
     pReturnValue->SetUndefined();
 }
diff --git a/xfa/fxfa/parser/cxfa_value.cpp b/xfa/fxfa/parser/cxfa_value.cpp
index ecb380f9c8..24bd338fe2 100644
--- a/xfa/fxfa/parser/cxfa_value.cpp
+++ b/xfa/fxfa/parser/cxfa_value.cpp
@@ -69,36 +69,42 @@ WideString CXFA_Value::GetChildValueContent() const {
 
 CXFA_Arc* CXFA_Value::GetArcIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::Arc);
+  if (!node || node->GetElementType() != XFA_Element::Arc)
+    return nullptr;
   return static_cast<CXFA_Arc*>(node);
 }
 
 CXFA_Line* CXFA_Value::GetLineIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::Line);
+  if (!node || node->GetElementType() != XFA_Element::Line)
+    return nullptr;
   return static_cast<CXFA_Line*>(node);
 }
 
 CXFA_Rectangle* CXFA_Value::GetRectangleIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::Rectangle);
+  if (!node || node->GetElementType() != XFA_Element::Rectangle)
+    return nullptr;
   return static_cast<CXFA_Rectangle*>(node);
 }
 
 CXFA_Text* CXFA_Value::GetTextIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::Text);
+  if (!node || node->GetElementType() != XFA_Element::Text)
+    return nullptr;
   return static_cast<CXFA_Text*>(node);
 }
 
 CXFA_ExData* CXFA_Value::GetExDataIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::ExData);
+  if (!node || node->GetElementType() != XFA_Element::ExData)
+    return nullptr;
   return static_cast<CXFA_ExData*>(node);
 }
 
 CXFA_Image* CXFA_Value::GetImageIfExists() const {
   CXFA_Node* node = GetFirstChild();
-  ASSERT(!node || node->GetElementType() == XFA_Element::Image);
+  if (!node || node->GetElementType() != XFA_Element::Image)
+    return nullptr;
   return static_cast<CXFA_Image*>(node);
 }