Rename IFWL_Widget::SetDelegate

The ::SetDelegate method was misleading. The primary use was
SetDelegate(nullptr) which returned the current delegate and didn't actually
set anything. When a value was passed it would set the
|m_pCurDelegate| not the |m_pDelegate|.

This Cl breaks ::SetDelegate into ::GetCurrentDelegate and ::SetCurrentDelegate
to make it clear what is happening and that this does not effect the
|m_pDelegate| variable.

Review-Url: https://codereview.chromium.org/2459423003

14 files changed, 56 insertions, 84 deletions

diff --git a/xfa/fwl/core/cfwl_widget.cpp b/xfa/fwl/core/cfwl_widget.cpp
index 9aeb127e9e..d277f26a76 100644
--- a/xfa/fwl/core/cfwl_widget.cpp
+++ b/xfa/fwl/core/cfwl_widget.cpp
@@ -20,7 +20,6 @@
 
 CFWL_Widget::CFWL_Widget(const IFWL_App* app)
     : m_pApp(app),
-      m_pDelegate(nullptr),
       m_pWidgetMgr(app->GetWidgetMgr()),
       m_pProperties(new CFWL_WidgetProperties) {
   ASSERT(m_pWidgetMgr);
@@ -131,10 +130,11 @@ FWL_Error CFWL_Widget::DrawWidget(CFX_Graphics* pGraphics,
   return m_pIface->DrawWidget(pGraphics, pMatrix);
 }
 
-IFWL_WidgetDelegate* CFWL_Widget::SetDelegate(IFWL_WidgetDelegate* pDelegate) {
-  if (!m_pIface)
-    return nullptr;
+IFWL_WidgetDelegate* CFWL_Widget::GetCurrentDelegate() {
+  return m_pIface ? m_pIface->GetCurrentDelegate() : nullptr;
+}
 
-  m_pDelegate = m_pIface->SetDelegate(pDelegate);
-  return m_pDelegate;
+void CFWL_Widget::SetCurrentDelegate(IFWL_WidgetDelegate* pDelegate) {
+  if (m_pIface)
+    m_pIface->SetCurrentDelegate(pDelegate);
 }
diff --git a/xfa/fwl/core/cfwl_widget.h b/xfa/fwl/core/cfwl_widget.h
index 64e6dc66fa..28a76661ef 100644
--- a/xfa/fwl/core/cfwl_widget.h
+++ b/xfa/fwl/core/cfwl_widget.h
@@ -51,14 +51,14 @@ class CFWL_Widget {
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr);
 
-  IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
+  IFWL_WidgetDelegate* GetCurrentDelegate();
+  void SetCurrentDelegate(IFWL_WidgetDelegate*);
 
  protected:
   void Initialize();
 
   const IFWL_App* m_pApp;
   std::unique_ptr<IFWL_Widget> m_pIface;
-  IFWL_WidgetDelegate* m_pDelegate;
   CFWL_WidgetMgr* const m_pWidgetMgr;
   std::unique_ptr<CFWL_WidgetProperties> m_pProperties;
 };
diff --git a/xfa/fwl/core/cfwl_widgetmgr.cpp b/xfa/fwl/core/cfwl_widgetmgr.cpp
index bcbc394884..1008defcab 100644
--- a/xfa/fwl/core/cfwl_widgetmgr.cpp
+++ b/xfa/fwl/core/cfwl_widgetmgr.cpp
@@ -613,21 +613,18 @@ void CFWL_WidgetMgrDelegate::OnDrawWidget(IFWL_Widget* pWidget,
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_ || \
     _FX_OS_ == _FX_LINUX_DESKTOP_ || _FX_OS_ == _FX_ANDROID_
-  IFWL_WidgetDelegate* pDelegate = pWidget->SetDelegate(nullptr);
-  pDelegate->OnDrawWidget(pTemp, pMatrix);
+  pWidget->GetCurrentDelegate()->OnDrawWidget(pTemp, pMatrix);
   pGraphics->GetClipRect(clipBounds);
   clipCopy = clipBounds;
 #elif _FX_OS_ == _FX_MACOSX_
   if (m_pWidgetMgr->IsFormDisabled()) {
-    IFWL_WidgetDelegate* pDelegate = pWidget->SetDelegate(nullptr);
-    pDelegate->OnDrawWidget(pTemp, pMatrix);
+    pWidget->GetCurrentDelegate()->OnDrawWidget(pTemp, pMatrix);
     pGraphics->GetClipRect(clipBounds);
     clipCopy = clipBounds;
   } else {
     clipBounds.Set(pMatrix->a, pMatrix->b, pMatrix->c, pMatrix->d);
     const_cast<CFX_Matrix*>(pMatrix)->SetIdentity();  // FIXME: const cast.
-    IFWL_WidgetDelegate* pDelegate = pWidget->SetDelegate(nullptr);
-    pDelegate->OnDrawWidget(pTemp, pMatrix);
+    pWidget->GetCurrentDelegate()->OnDrawWidget(pTemp, pMatrix);
   }
 #endif  // _FX_OS_ == _FX_MACOSX_
 
@@ -680,8 +677,8 @@ void CFWL_WidgetMgrDelegate::DrawChild(IFWL_Widget* parent,
       pGraphics->SetClipRect(clipBounds);
     }
     widgetMatrix.Translate(rtWidget.left, rtWidget.top, TRUE);
-    IFWL_WidgetDelegate* pDelegate = child->SetDelegate(nullptr);
-    if (pDelegate) {
+
+    if (IFWL_WidgetDelegate* pDelegate = child->GetCurrentDelegate()) {
       if (m_pWidgetMgr->IsFormDisabled() ||
           IsNeedRepaint(child, &widgetMatrix, rtClip)) {
         pDelegate->OnDrawWidget(pGraphics, &widgetMatrix);
diff --git a/xfa/fwl/core/fwl_noteimp.cpp b/xfa/fwl/core/fwl_noteimp.cpp
index 318fd9f6fc..22579571d4 100644
--- a/xfa/fwl/core/fwl_noteimp.cpp
+++ b/xfa/fwl/core/fwl_noteimp.cpp
@@ -144,10 +144,8 @@ FX_BOOL CFWL_NoteDriver::SetFocus(IFWL_Widget* pFocus, FX_BOOL bNotify) {
     if (bNotify) {
       ms.m_dwExtend = 1;
     }
-    IFWL_WidgetDelegate* pDelegate = pPrev->SetDelegate(nullptr);
-    if (pDelegate) {
+    if (IFWL_WidgetDelegate* pDelegate = pPrev->GetCurrentDelegate())
       pDelegate->OnProcessMessage(&ms);
-    }
   }
   if (pFocus) {
     IFWL_Widget* pWidget =
@@ -161,10 +159,9 @@ FX_BOOL CFWL_NoteDriver::SetFocus(IFWL_Widget* pFocus, FX_BOOL bNotify) {
     if (bNotify) {
       ms.m_dwExtend = 1;
     }
-    IFWL_WidgetDelegate* pDelegate = pFocus->SetDelegate(nullptr);
-    if (pDelegate) {
+
+    if (IFWL_WidgetDelegate* pDelegate = pFocus->GetCurrentDelegate())
       pDelegate->OnProcessMessage(&ms);
-    }
   }
   return TRUE;
 }
@@ -363,10 +360,10 @@ FX_BOOL CFWL_NoteDriver::DispatchMessage(CFWL_Message* pMessage,
     }
   }
   if (bRet) {
-    IFWL_WidgetDelegate* pDelegate =
-        pMessage->m_pDstTarget->SetDelegate(nullptr);
-    if (pDelegate)
+    if (IFWL_WidgetDelegate* pDelegate =
+            pMessage->m_pDstTarget->GetCurrentDelegate()) {
       pDelegate->OnProcessMessage(pMessage);
+    }
   }
   return bRet;
 }
@@ -710,7 +707,7 @@ int32_t CFWL_EventTarget::SetEventSource(IFWL_Widget* pSource,
 }
 
 FX_BOOL CFWL_EventTarget::ProcessEvent(CFWL_Event* pEvent) {
-  IFWL_WidgetDelegate* pDelegate = m_pListener->SetDelegate(nullptr);
+  IFWL_WidgetDelegate* pDelegate = m_pListener->GetCurrentDelegate();
   if (!pDelegate)
     return FALSE;
   if (m_eventSources.GetCount() == 0) {
diff --git a/xfa/fwl/core/ifwl_combobox.cpp b/xfa/fwl/core/ifwl_combobox.cpp
index dcd2cf850e..123dc9bea9 100644
--- a/xfa/fwl/core/ifwl_combobox.cpp
+++ b/xfa/fwl/core/ifwl_combobox.cpp
@@ -718,7 +718,7 @@ void IFWL_ComboBox::InitProxyForm() {
   m_pForm->Initialize();
   m_pListBox->SetParent(m_pForm);
   m_pListProxyDelegate = new CFWL_ComboProxyImpDelegate(m_pForm, this);
-  m_pForm->SetDelegate(m_pListProxyDelegate);
+  m_pForm->SetCurrentDelegate(m_pListProxyDelegate);
 }
 
 void IFWL_ComboBox::DisForm_InitComboList() {
@@ -1158,10 +1158,8 @@ void CFWL_ComboBoxImpDelegate::DoSubCtrlKey(CFWL_MsgKey* pMsg) {
     return;
   }
   FX_BOOL bDropDown = m_pOwner->IsDropDownStyle();
-  if (bDropDown) {
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(pMsg);
-  }
+  if (bDropDown)
+    m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(pMsg);
 }
 
 void CFWL_ComboBoxImpDelegate::DisForm_OnProcessMessage(
@@ -1210,9 +1208,8 @@ void CFWL_ComboBoxImpDelegate::DisForm_OnProcessMessage(
                            pKey->m_dwKeyCode == FWL_VKEY_Return ||
                            pKey->m_dwKeyCode == FWL_VKEY_Escape;
         if (bListKey) {
-          IFWL_WidgetDelegate* pDelegate =
-              m_pOwner->m_pListBox->SetDelegate(nullptr);
-          pDelegate->OnProcessMessage(pMessage);
+          m_pOwner->m_pListBox->GetCurrentDelegate()->OnProcessMessage(
+              pMessage);
           break;
         }
       }
@@ -1252,8 +1249,7 @@ void CFWL_ComboBoxImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
       CFWL_MsgSetFocus msg;
       msg.m_pDstTarget = m_pOwner->m_pEdit.get();
       msg.m_pSrcTarget = nullptr;
-      IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-      pDelegate->OnProcessMessage(&msg);
+      m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(&msg);
     }
   } else {
     m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
@@ -1261,8 +1257,7 @@ void CFWL_ComboBoxImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
     CFWL_MsgKillFocus msg;
     msg.m_pDstTarget = nullptr;
     msg.m_pSrcTarget = m_pOwner->m_pEdit.get();
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(&msg);
+    m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(&msg);
   }
 }
 
@@ -1305,10 +1300,8 @@ void CFWL_ComboBoxImpDelegate::DisForm_OnKey(CFWL_MsgKey* pMsg) {
     m_pOwner->SynchrEditText(m_pOwner->m_iCurSel);
     return;
   }
-  if (m_pOwner->m_pEdit) {
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(pMsg);
-  }
+  if (m_pOwner->m_pEdit)
+    m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(pMsg);
 }
 
 CFWL_ComboProxyImpDelegate::CFWL_ComboProxyImpDelegate(IFWL_Form* pForm,
diff --git a/xfa/fwl/core/ifwl_combolist.cpp b/xfa/fwl/core/ifwl_combolist.cpp
index 6538bff20d..23392a5c70 100644
--- a/xfa/fwl/core/ifwl_combolist.cpp
+++ b/xfa/fwl/core/ifwl_combolist.cpp
@@ -124,9 +124,8 @@ void CFWL_ComboListImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
       if (rect.Contains(pMsg->m_fx, pMsg->m_fy)) {
         pMsg->m_fx -= rect.left;
         pMsg->m_fy -= rect.top;
-        IFWL_WidgetDelegate* pDelegate =
-            m_pOwner->m_pVertScrollBar->SetDelegate(nullptr);
-        pDelegate->OnProcessMessage(pMsg);
+        m_pOwner->m_pVertScrollBar->GetCurrentDelegate()->OnProcessMessage(
+            pMsg);
         return;
       }
     }
@@ -246,7 +245,6 @@ int32_t CFWL_ComboListImpDelegate::OnDropListKey(CFWL_MsgKey* pKey) {
       case FWL_VKEY_Up:
       case FWL_VKEY_Down: {
         OnDropListKeyDown(pKey);
-        pOuter->SetDelegate(nullptr);
         pOuter->ProcessSelChanged(FALSE);
         return 1;
       }
diff --git a/xfa/fwl/core/ifwl_datetimecalendar.cpp b/xfa/fwl/core/ifwl_datetimecalendar.cpp
index e85bdfb606..ee04bf4978 100644
--- a/xfa/fwl/core/ifwl_datetimecalendar.cpp
+++ b/xfa/fwl/core/ifwl_datetimecalendar.cpp
@@ -42,8 +42,7 @@ void CFWL_DateTimeCalendarImpDelegate::OnProcessMessage(
   if (dwCode == CFWL_MessageType::SetFocus ||
       dwCode == CFWL_MessageType::KillFocus) {
     IFWL_Widget* pOuter = m_pOwner->GetOuter();
-    IFWL_WidgetDelegate* pDelegate = pOuter->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(pMessage);
+    pOuter->GetCurrentDelegate()->OnProcessMessage(pMessage);
     return;
   }
   if (dwCode == CFWL_MessageType::Mouse) {
diff --git a/xfa/fwl/core/ifwl_datetimeedit.cpp b/xfa/fwl/core/ifwl_datetimeedit.cpp
index 9d0a08bed6..6a7fd26214 100644
--- a/xfa/fwl/core/ifwl_datetimeedit.cpp
+++ b/xfa/fwl/core/ifwl_datetimeedit.cpp
@@ -42,8 +42,7 @@ void CFWL_DateTimeEditImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   if (dwHashCode == CFWL_MessageType::SetFocus ||
       dwHashCode == CFWL_MessageType::KillFocus) {
     IFWL_Widget* pOuter = m_pOwner->GetOuter();
-    IFWL_WidgetDelegate* pDelegate = pOuter->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(pMessage);
+    pOuter->GetCurrentDelegate()->OnProcessMessage(pMessage);
   }
 }
 
diff --git a/xfa/fwl/core/ifwl_datetimepicker.cpp b/xfa/fwl/core/ifwl_datetimepicker.cpp
index 9292a5acfa..148a85cfe6 100644
--- a/xfa/fwl/core/ifwl_datetimepicker.cpp
+++ b/xfa/fwl/core/ifwl_datetimepicker.cpp
@@ -545,8 +545,7 @@ void IFWL_DateTimePicker::DisForm_ShowMonthCalendar(FX_BOOL bActivate) {
     CFWL_MsgSetFocus msg;
     msg.m_pDstTarget = m_pMonthCal.get();
     msg.m_pSrcTarget = m_pEdit.get();
-    IFWL_WidgetDelegate* pDelegate = m_pEdit->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(&msg);
+    m_pEdit->GetCurrentDelegate()->OnProcessMessage(&msg);
   }
   CFX_RectF rtInvalidate, rtCal;
   rtInvalidate.Set(0, 0, m_pProperties->m_rtWidget.width,
@@ -712,9 +711,7 @@ void CFWL_DateTimePickerImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
     }
     case CFWL_MessageType::Key: {
       if (m_pOwner->m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
-        IFWL_WidgetDelegate* pDelegate =
-            m_pOwner->m_pEdit->SetDelegate(nullptr);
-        pDelegate->OnProcessMessage(pMessage);
+        m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(pMessage);
         return;
       }
       break;
@@ -817,8 +814,7 @@ void CFWL_DateTimePickerImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
     }
     rtInvalidate = m_pOwner->m_rtBtn;
     pMsg->m_pDstTarget = m_pOwner->m_pEdit.get();
-    IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-    pDelegate->OnProcessMessage(pMsg);
+    m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(pMsg);
   } else {
     m_pOwner->m_pProperties->m_dwStates &= ~FWL_WGTSTATE_Focused;
     m_pOwner->m_rtBtn.Set(0, 0, 0, 0);
@@ -827,8 +823,7 @@ void CFWL_DateTimePickerImpDelegate::DisForm_OnFocusChanged(CFWL_Message* pMsg,
     }
     if (m_pOwner->m_pEdit->GetStates() & FWL_WGTSTATE_Focused) {
       pMsg->m_pSrcTarget = m_pOwner->m_pEdit.get();
-      IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pEdit->SetDelegate(nullptr);
-      pDelegate->OnProcessMessage(pMsg);
+      m_pOwner->m_pEdit->GetCurrentDelegate()->OnProcessMessage(pMsg);
     }
   }
   rtInvalidate.Inflate(2, 2);
diff --git a/xfa/fwl/core/ifwl_form.cpp b/xfa/fwl/core/ifwl_form.cpp
index e46328b634..2ded30e6d6 100644
--- a/xfa/fwl/core/ifwl_form.cpp
+++ b/xfa/fwl/core/ifwl_form.cpp
@@ -830,10 +830,11 @@ void CFWL_FormImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
         if (pSubFocus == pDriver->GetFocus()) {
           pDriver->SetFocus(nullptr);
         } else if (pSubFocus->GetStates() & FWL_WGTSTATE_Focused) {
-          CFWL_MsgKillFocus ms;
-          IFWL_WidgetDelegate* pDelegate = pSubFocus->SetDelegate(nullptr);
-          if (pDelegate)
+          if (IFWL_WidgetDelegate* pDelegate =
+                  pSubFocus->GetCurrentDelegate()) {
+            CFWL_MsgKillFocus ms;
             pDelegate->OnProcessMessage(&ms);
+          }
         }
       }
       m_pOwner->Repaint(&m_pOwner->m_rtRelative);
diff --git a/xfa/fwl/core/ifwl_formproxy.cpp b/xfa/fwl/core/ifwl_formproxy.cpp
index 16cd90813d..f79e915378 100644
--- a/xfa/fwl/core/ifwl_formproxy.cpp
+++ b/xfa/fwl/core/ifwl_formproxy.cpp
@@ -50,6 +50,5 @@ CFWL_FormProxyImpDelegate::CFWL_FormProxyImpDelegate(IFWL_FormProxy* pOwner)
     : m_pOwner(pOwner) {}
 
 void CFWL_FormProxyImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
-  IFWL_WidgetDelegate* pDelegate = m_pOwner->m_pOuter->SetDelegate(nullptr);
-  pDelegate->OnProcessMessage(pMessage);
+  m_pOwner->m_pOuter->GetCurrentDelegate()->OnProcessMessage(pMessage);
 }
diff --git a/xfa/fwl/core/ifwl_listbox.cpp b/xfa/fwl/core/ifwl_listbox.cpp
index 05cc64bb90..7cd4c53ff3 100644
--- a/xfa/fwl/core/ifwl_listbox.cpp
+++ b/xfa/fwl/core/ifwl_listbox.cpp
@@ -1075,12 +1075,8 @@ void CFWL_ListBoxImpDelegate::OnLButtonUp(CFWL_MsgMouse* pMsg) {
 }
 
 void CFWL_ListBoxImpDelegate::OnMouseWheel(CFWL_MsgMouseWheel* pMsg) {
-  if (!m_pOwner->IsShowScrollBar(TRUE)) {
-    return;
-  }
-  IFWL_WidgetDelegate* pDelegate =
-      m_pOwner->m_pVertScrollBar->SetDelegate(nullptr);
-  pDelegate->OnProcessMessage(pMsg);
+  if (m_pOwner->IsShowScrollBar(TRUE))
+    m_pOwner->m_pVertScrollBar->GetCurrentDelegate()->OnProcessMessage(pMsg);
 }
 
 void CFWL_ListBoxImpDelegate::OnKeyDown(CFWL_MsgKey* pMsg) {
diff --git a/xfa/fwl/core/ifwl_widget.cpp b/xfa/fwl/core/ifwl_widget.cpp
index eb8b1281e9..da90c4892d 100644
--- a/xfa/fwl/core/ifwl_widget.cpp
+++ b/xfa/fwl/core/ifwl_widget.cpp
@@ -100,10 +100,9 @@ FWL_Error IFWL_Widget::SetWidgetRect(const CFX_RectF& rect) {
       ev.m_pSrcTarget = this;
       ev.m_rtOld = rtOld;
       ev.m_rtNew = rect;
-      IFWL_WidgetDelegate* pDelegate = SetDelegate(nullptr);
-      if (pDelegate) {
+
+      if (IFWL_WidgetDelegate* pDelegate = GetCurrentDelegate())
         pDelegate->OnProcessEvent(&ev);
-      }
     }
     return FWL_Error::Succeeded;
   }
@@ -353,16 +352,14 @@ FWL_Error IFWL_Widget::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   return FWL_Error::Succeeded;
 }
 
-IFWL_WidgetDelegate* IFWL_Widget::SetDelegate(IFWL_WidgetDelegate* pDelegate) {
-  if (!m_pCurDelegate) {
+IFWL_WidgetDelegate* IFWL_Widget::GetCurrentDelegate() {
+  if (!m_pCurDelegate)
     m_pCurDelegate = m_pDelegate;
-  }
-  if (!pDelegate) {
-    return m_pCurDelegate;
-  }
-  IFWL_WidgetDelegate* pOldDelegate = m_pCurDelegate;
+  return m_pCurDelegate;
+}
+
+void IFWL_Widget::SetCurrentDelegate(IFWL_WidgetDelegate* pDelegate) {
   m_pCurDelegate = pDelegate;
-  return pOldDelegate;
 }
 
 const IFWL_App* IFWL_Widget::GetOwnerApp() const {
@@ -727,8 +724,7 @@ void IFWL_Widget::DispatchKeyEvent(CFWL_MsgKey* pNote) {
 
 void IFWL_Widget::DispatchEvent(CFWL_Event* pEvent) {
   if (m_pOuter) {
-    IFWL_WidgetDelegate* pDelegate = m_pOuter->SetDelegate(nullptr);
-    pDelegate->OnProcessEvent(pEvent);
+    m_pOuter->GetCurrentDelegate()->OnProcessEvent(pEvent);
     return;
   }
   const IFWL_App* pApp = GetOwnerApp();
diff --git a/xfa/fwl/core/ifwl_widget.h b/xfa/fwl/core/ifwl_widget.h
index 38a8d337f6..2b385abc0e 100644
--- a/xfa/fwl/core/ifwl_widget.h
+++ b/xfa/fwl/core/ifwl_widget.h
@@ -113,7 +113,9 @@ class IFWL_Widget {
 
   virtual IFWL_ThemeProvider* GetThemeProvider();
   virtual FWL_Error SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
-  virtual IFWL_WidgetDelegate* SetDelegate(IFWL_WidgetDelegate* pDelegate);
+
+  IFWL_WidgetDelegate* GetCurrentDelegate();
+  void SetCurrentDelegate(IFWL_WidgetDelegate* pDelegate);
 
   const IFWL_App* GetOwnerApp() const;