Use unowned ptr for IFWL_ delegates

Change-Id: I1e9059242dad254394b73c6fddb010b182e969f0
Reviewed-on: https://pdfium-review.googlesource.com/36230
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

7 files changed, 12 insertions, 8 deletions

diff --git a/xfa/fxfa/cxfa_ffcheckbutton.h b/xfa/fxfa/cxfa_ffcheckbutton.h
index 12519a9543..0bbec75ee5 100644
--- a/xfa/fxfa/cxfa_ffcheckbutton.h
+++ b/xfa/fxfa/cxfa_ffcheckbutton.h
@@ -44,7 +44,7 @@ class CXFA_FFCheckButton : public CXFA_FFField {
   void AddUIMargin(XFA_AttributeEnum iCapPlacement);
   XFA_CHECKSTATE FWLState2XFAState();
 
-  IFWL_WidgetDelegate* m_pOldDelegate = nullptr;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
   CFX_RectF m_rtCheckBox;
   UnownedPtr<CXFA_CheckButton> button_;
 };
diff --git a/xfa/fxfa/cxfa_ffcombobox.h b/xfa/fxfa/cxfa_ffcombobox.h
index 66f92b2557..d1c710bcc9 100644
--- a/xfa/fxfa/cxfa_ffcombobox.h
+++ b/xfa/fxfa/cxfa_ffcombobox.h
@@ -7,6 +7,7 @@
 #ifndef XFA_FXFA_CXFA_FFCOMBOBOX_H_
 #define XFA_FXFA_CXFA_FFCOMBOBOX_H_
 
+#include "core/fxcrt/unowned_ptr.h"
 #include "xfa/fxfa/cxfa_ffdropdown.h"
 
 class CXFA_EventParam;
@@ -59,7 +60,7 @@ class CXFA_FFComboBox : public CXFA_FFDropDown {
   void SetItemState(int32_t nIndex, bool bSelected);
 
  private:
-  // CXFA_FFField
+  // CXFA_FFField:
   bool PtInActiveRect(const CFX_PointF& point) override;
   bool CommitData() override;
   bool UpdateFWLData() override;
@@ -67,11 +68,10 @@ class CXFA_FFComboBox : public CXFA_FFDropDown {
 
   uint32_t GetAlignment();
   void FWLEventSelChange(CXFA_EventParam* pParam);
-
   WideString GetCurrentText() const;
 
   WideString m_wsNewValue;
-  IFWL_WidgetDelegate* m_pOldDelegate;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
 };
 
 #endif  // XFA_FXFA_CXFA_FFCOMBOBOX_H_
diff --git a/xfa/fxfa/cxfa_ffimageedit.h b/xfa/fxfa/cxfa_ffimageedit.h
index 2b84c54360..3359696b42 100644
--- a/xfa/fxfa/cxfa_ffimageedit.h
+++ b/xfa/fxfa/cxfa_ffimageedit.h
@@ -7,6 +7,7 @@
 #ifndef XFA_FXFA_CXFA_FFIMAGEEDIT_H_
 #define XFA_FXFA_CXFA_FFIMAGEEDIT_H_
 
+#include "core/fxcrt/unowned_ptr.h"
 #include "xfa/fxfa/cxfa_fffield.h"
 
 class CXFA_FFImageEdit : public CXFA_FFField {
@@ -35,7 +36,7 @@ class CXFA_FFImageEdit : public CXFA_FFField {
   bool UpdateFWLData() override;
   bool CommitData() override;
 
-  IFWL_WidgetDelegate* m_pOldDelegate;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
 };
 
 #endif  // XFA_FXFA_CXFA_FFIMAGEEDIT_H_
diff --git a/xfa/fxfa/cxfa_fflistbox.h b/xfa/fxfa/cxfa_fflistbox.h
index feff0b7cbb..4b12b5924d 100644
--- a/xfa/fxfa/cxfa_fflistbox.h
+++ b/xfa/fxfa/cxfa_fflistbox.h
@@ -7,6 +7,7 @@
 #ifndef XFA_FXFA_CXFA_FFLISTBOX_H_
 #define XFA_FXFA_CXFA_FFLISTBOX_H_
 
+#include "core/fxcrt/unowned_ptr.h"
 #include "xfa/fxfa/cxfa_ffdropdown.h"
 
 class CXFA_FFListBox : public CXFA_FFDropDown {
@@ -37,7 +38,7 @@ class CXFA_FFListBox : public CXFA_FFDropDown {
 
   uint32_t GetAlignment();
 
-  IFWL_WidgetDelegate* m_pOldDelegate;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
 };
 
 #endif  // XFA_FXFA_CXFA_FFLISTBOX_H_
diff --git a/xfa/fxfa/cxfa_ffpushbutton.cpp b/xfa/fxfa/cxfa_ffpushbutton.cpp
index 648a2298a3..295422dcf3 100644
--- a/xfa/fxfa/cxfa_ffpushbutton.cpp
+++ b/xfa/fxfa/cxfa_ffpushbutton.cpp
@@ -93,6 +93,7 @@ void CXFA_FFPushButton::UnloadWidget() {
   m_pDownTextLayout.reset();
   m_pRollProvider.reset();
   m_pDownProvider.reset();
+  m_pOldDelegate = nullptr;
   CXFA_FFField::UnloadWidget();
 }
 
diff --git a/xfa/fxfa/cxfa_ffpushbutton.h b/xfa/fxfa/cxfa_ffpushbutton.h
index e247ee5e39..73308c0c8f 100644
--- a/xfa/fxfa/cxfa_ffpushbutton.h
+++ b/xfa/fxfa/cxfa_ffpushbutton.h
@@ -51,7 +51,7 @@ class CXFA_FFPushButton : public CXFA_FFField {
   std::unique_ptr<CXFA_TextLayout> m_pDownTextLayout;
   std::unique_ptr<CXFA_TextProvider> m_pRollProvider;
   std::unique_ptr<CXFA_TextProvider> m_pDownProvider;
-  IFWL_WidgetDelegate* m_pOldDelegate = nullptr;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
   UnownedPtr<CXFA_Button> button_;
 };
 
diff --git a/xfa/fxfa/cxfa_fftextedit.h b/xfa/fxfa/cxfa_fftextedit.h
index 9b61373df9..37604c14ba 100644
--- a/xfa/fxfa/cxfa_fftextedit.h
+++ b/xfa/fxfa/cxfa_fftextedit.h
@@ -9,6 +9,7 @@
 
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/unowned_ptr.h"
 #include "xfa/fxfa/cxfa_fffield.h"
 
 class CFWL_Event;
@@ -63,7 +64,7 @@ class CXFA_FFTextEdit : public CXFA_FFField {
  protected:
   uint32_t GetAlignment();
 
-  IFWL_WidgetDelegate* m_pOldDelegate;
+  UnownedPtr<IFWL_WidgetDelegate> m_pOldDelegate;
 
  private:
   bool CommitData() override;