[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>

1 files changed, 12 insertions, 6 deletions

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);
 }