Add type cast definitions for CPDF_Name.

This Cl adds ToName, CPDF_Object::AsName and CPDF_Object::IsName and
updates the src to use them as needed.

BUG=pdfium:201
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1417823005 .

5 files changed, 12 insertions, 12 deletions

diff --git a/core/src/fpdfdoc/doc_action.cpp b/core/src/fpdfdoc/doc_action.cpp
index c55c20cb1d..bcbfe0f112 100644
--- a/core/src/fpdfdoc/doc_action.cpp
+++ b/core/src/fpdfdoc/doc_action.cpp
@@ -17,7 +17,7 @@ CPDF_Dest CPDF_Action::GetDest(CPDF_Document* pDoc) const {
   if (!pDest) {
     return CPDF_Dest();
   }
-  if (pDest->IsString() || pDest->GetType() == PDFOBJ_NAME) {
+  if (pDest->IsString() || pDest->IsName()) {
     CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
     CFX_ByteStringC name = pDest->GetString();
     return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
diff --git a/core/src/fpdfdoc/doc_bookmark.cpp b/core/src/fpdfdoc/doc_bookmark.cpp
index 9d2a9f61ea..6b020e5957 100644
--- a/core/src/fpdfdoc/doc_bookmark.cpp
+++ b/core/src/fpdfdoc/doc_bookmark.cpp
@@ -72,10 +72,10 @@ CPDF_Dest CPDF_Bookmark::GetDest(CPDF_Document* pDocument) const {
     return CPDF_Dest();
   }
   CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
-  if (!pDest) {
+  if (!pDest)
     return CPDF_Dest();
-  }
-  if (pDest->IsString() || pDest->GetType() == PDFOBJ_NAME) {
+
+  if (pDest->IsString() || pDest->IsName()) {
     CPDF_NameTree name_tree(pDocument, FX_BSTRC("Dests"));
     CFX_ByteStringC name = pDest->GetString();
     return CPDF_Dest(name_tree.LookupNamedDest(pDocument, name));
diff --git a/core/src/fpdfdoc/doc_formfield.cpp b/core/src/fpdfdoc/doc_formfield.cpp
index 25f5490a72..f9b8438a0e 100644
--- a/core/src/fpdfdoc/doc_formfield.cpp
+++ b/core/src/fpdfdoc/doc_formfield.cpp
@@ -529,7 +529,7 @@ FX_BOOL CPDF_FormField::IsItemSelected(int index) {
   }
 
   if (pValue->IsString())
-    return (pValue->GetUnicodeText() == opt_value);
+    return pValue->GetUnicodeText() == opt_value;
 
   if (pValue->IsNumber()) {
     if (pValue->GetString().IsEmpty())
diff --git a/core/src/fpdfdoc/doc_link.cpp b/core/src/fpdfdoc/doc_link.cpp
index 95411013b4..977efeafd1 100644
--- a/core/src/fpdfdoc/doc_link.cpp
+++ b/core/src/fpdfdoc/doc_link.cpp
@@ -73,10 +73,10 @@ CPDF_Rect CPDF_Link::GetRect() {
 }
 CPDF_Dest CPDF_Link::GetDest(CPDF_Document* pDoc) {
   CPDF_Object* pDest = m_pDict->GetElementValue("Dest");
-  if (pDest == NULL) {
+  if (!pDest)
     return CPDF_Dest();
-  }
-  if (pDest->IsString() || pDest->GetType() == PDFOBJ_NAME) {
+
+  if (pDest->IsString() || pDest->IsName()) {
     CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
     CFX_ByteStringC name = pDest->GetString();
     return CPDF_Dest(name_tree.LookupNamedDest(pDoc, name));
diff --git a/core/src/fpdfdoc/doc_tagged.cpp b/core/src/fpdfdoc/doc_tagged.cpp
index d9d439f730..ac29d90118 100644
--- a/core/src/fpdfdoc/doc_tagged.cpp
+++ b/core/src/fpdfdoc/doc_tagged.cpp
@@ -417,11 +417,11 @@ CFX_ByteString CPDF_StructElementImpl::GetName(
     FX_BOOL bInheritable,
     int subindex) {
   CPDF_Object* pAttr = GetAttr(owner, name, bInheritable, subindex);
-  if (pAttr == NULL || pAttr->GetType() != PDFOBJ_NAME) {
-    return default_value;
-  }
-  return pAttr->GetString();
+  if (ToName(pAttr))
+    return pAttr->GetString();
+  return default_value;
 }
+
 FX_ARGB CPDF_StructElementImpl::GetColor(const CFX_ByteStringC& owner,
                                          const CFX_ByteStringC& name,
                                          FX_ARGB default_value,