From 44d83f3f0b90f4c53ca42115d4f1ed614b25c3a7 Mon Sep 17 00:00:00 2001
From: tsepez <tsepez@chromium.org>
Date: Mon, 16 May 2016 14:10:22 -0700
Subject: Use CFX_RetainPtr<> to refcount CPDFXFA_Page

Review-Url: https://codereview.chromium.org/1984693002
---
 fpdfsdk/fpdfxfa/fpdfxfa_doc.cpp        | 2 +-
 fpdfsdk/fpdfxfa/fpdfxfa_page.cpp       | 9 +--------
 fpdfsdk/fpdfxfa/include/fpdfxfa_page.h | 7 +++++--
 fpdfsdk/fsdk_mgr.cpp                   | 5 ++---
 4 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/fpdfsdk/fpdfxfa/fpdfxfa_doc.cpp b/fpdfsdk/fpdfxfa/fpdfxfa_doc.cpp
index 4d2a559a39..7a9d074624 100644
--- a/fpdfsdk/fpdfxfa/fpdfxfa_doc.cpp
+++ b/fpdfsdk/fpdfxfa/fpdfxfa_doc.cpp
@@ -160,7 +160,7 @@ CPDFXFA_Page* CPDFXFA_Document::GetPage(int page_index) {
   if (nCount > 0 && page_index < nCount) {
     pPage = m_XFAPageList.GetAt(page_index);
     if (pPage)
-      pPage->AddRef();
+      pPage->Retain();
   } else {
     m_nPageCount = GetPageCount();
     m_XFAPageList.SetSize(m_nPageCount);
diff --git a/fpdfsdk/fpdfxfa/fpdfxfa_page.cpp b/fpdfsdk/fpdfxfa/fpdfxfa_page.cpp
index 22c8f995f2..8dbbf4e07c 100644
--- a/fpdfsdk/fpdfxfa/fpdfxfa_page.cpp
+++ b/fpdfsdk/fpdfxfa/fpdfxfa_page.cpp
@@ -21,16 +21,9 @@ CPDFXFA_Page::CPDFXFA_Page(CPDFXFA_Document* pDoc, int page_index)
       m_iPageIndex(page_index),
       m_iRef(1) {}
 
-CPDFXFA_Page::~CPDFXFA_Page() {}
-
-void CPDFXFA_Page::Release() {
-  if (--m_iRef > 0)
-    return;
-
+CPDFXFA_Page::~CPDFXFA_Page() {
   if (m_pDocument)
     m_pDocument->RemovePage(this);
-
-  delete this;
 }
 
 FX_BOOL CPDFXFA_Page::LoadPDFPage() {
diff --git a/fpdfsdk/fpdfxfa/include/fpdfxfa_page.h b/fpdfsdk/fpdfxfa/include/fpdfxfa_page.h
index 0f278912d6..2e08f580ed 100644
--- a/fpdfsdk/fpdfxfa/include/fpdfxfa_page.h
+++ b/fpdfsdk/fpdfxfa/include/fpdfxfa_page.h
@@ -22,8 +22,11 @@ class CPDFXFA_Page {
  public:
   CPDFXFA_Page(CPDFXFA_Document* pDoc, int page_index);
 
-  void AddRef() { m_iRef++; }
-  void Release();
+  void Retain() { m_iRef++; }
+  void Release() {
+    if (--m_iRef <= 0)
+      delete this;
+  }
 
   FX_BOOL LoadPage();
   FX_BOOL LoadPDFPage(CPDF_Dictionary* pageDict);
diff --git a/fpdfsdk/fsdk_mgr.cpp b/fpdfsdk/fsdk_mgr.cpp
index 2d641783f9..95a08a740c 100644
--- a/fpdfsdk/fsdk_mgr.cpp
+++ b/fpdfsdk/fsdk_mgr.cpp
@@ -12,6 +12,7 @@
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
+#include "core/fxcrt/include/cfx_retain_ptr.h"
 #include "fpdfsdk/formfiller/cffl_formfiller.h"
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/javascript/ijs_runtime.h"
@@ -902,7 +903,7 @@ void CPDFSDK_PageView::LoadFXAnnots() {
   SetLock(TRUE);
 
 #ifdef PDF_ENABLE_XFA
-  m_page->AddRef();
+  CFX_RetainPtr<CPDFXFA_Page> protector(m_page);
   if (m_pSDKDoc->GetXFADocument()->GetDocType() == DOCTYPE_DYNAMIC_XFA) {
     CXFA_FFPageView* pageView = m_page->GetXFAPageView();
     std::unique_ptr<IXFA_WidgetIterator> pWidgetHander(
@@ -911,7 +912,6 @@ void CPDFSDK_PageView::LoadFXAnnots() {
                                            XFA_WIDGETFILTER_Viewable |
                                            XFA_WIDGETFILTER_AllType));
     if (!pWidgetHander) {
-      m_page->Release();
       SetLock(FALSE);
       return;
     }
@@ -944,7 +944,6 @@ void CPDFSDK_PageView::LoadFXAnnots() {
       pAnnotHandlerMgr->Annot_OnLoad(pAnnot);
     }
   }
-  m_page->Release();
 #else   // PDF_ENABLE_XFA
   for (size_t i = 0; i < nCount; ++i) {
     CPDF_Annot* pPDFAnnot = m_pAnnotList->GetAt(i);
-- 
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