Change IFWL_Widget to store a single delegate.

xfa/fwl/core/ifwl_widget.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/core/ifwl_widget.h"
 
 #include <algorithm>
 
@@ skipping 12 matching lines @@
 #include "xfa/fxfa/xfa_ffapp.h"
 
 #define FWL_STYLEEXT_MNU_Vert (1L << 0)
 
 IFWL_Widget::IFWL_Widget(const IFWL_App* app,
                          const CFWL_WidgetImpProperties& properties,
                          IFWL_Widget* pOuter)
     : m_pOwnerApp(app),
       m_pWidgetMgr(app->GetWidgetMgr()),
       m_pProperties(new CFWL_WidgetImpProperties(properties)),
-      m_pCurDelegate(nullptr),
       m_pOuter(pOuter),
       m_pLayoutItem(nullptr),
       m_pAssociate(nullptr),
       m_iLock(0),
       m_nEventKey(0) {
   ASSERT(m_pWidgetMgr);
 
   IFWL_Widget* pParent = m_pProperties->m_pParent;
   m_pWidgetMgr->InsertWidget(pParent, this);
   if (IsChild())
@@ skipping 46 matching lines @@
   CFX_RectF rtOld = m_pProperties->m_rtWidget;
   m_pProperties->m_rtWidget = rect;
   if (IsChild()) {
     if (FXSYS_fabs(rtOld.width - rect.width) > 0.5f ||
         FXSYS_fabs(rtOld.height - rect.height) > 0.5f) {
       CFWL_EvtSizeChanged ev;
       ev.m_pSrcTarget = this;
       ev.m_rtOld = rtOld;
       ev.m_rtNew = rect;
 
-      if (IFWL_WidgetDelegate* pDelegate = GetCurrentDelegate())
+      if (IFWL_WidgetDelegate* pDelegate = GetDelegate())
         pDelegate->OnProcessEvent(&ev);
     }
     return FWL_Error::Succeeded;
   }
   m_pWidgetMgr->SetWidgetRect_Native(this, rect);
   return FWL_Error::Succeeded;
 }
 
 FWL_Error IFWL_Widget::GetClientRect(CFX_RectF& rect) {
   GetEdgeRect(rect);
@@ skipping 230 matching lines @@
 }
 
 IFWL_ThemeProvider* IFWL_Widget::GetThemeProvider() {
   return m_pProperties->m_pThemeProvider;
 }
 FWL_Error IFWL_Widget::SetThemeProvider(IFWL_ThemeProvider* pThemeProvider) {
   m_pProperties->m_pThemeProvider = pThemeProvider;
   return FWL_Error::Succeeded;
 }
 
-IFWL_WidgetDelegate* IFWL_Widget::GetCurrentDelegate() {
-  if (!m_pCurDelegate)
-    m_pCurDelegate = m_pDelegate.get();
-  return m_pCurDelegate;
-}
-
-void IFWL_Widget::SetCurrentDelegate(IFWL_WidgetDelegate* pDelegate) {
-  m_pCurDelegate = pDelegate;
-}
-
 const IFWL_App* IFWL_Widget::GetOwnerApp() const {
   return m_pOwnerApp;
 }
 
 uint32_t IFWL_Widget::GetEventKey() const {
   return m_nEventKey;
 }
 
 void IFWL_Widget::SetEventKey(uint32_t key) {
   m_nEventKey = key;
@@ skipping 342 matching lines @@
   pEvent->m_pSrcTarget = this;
   pEvent->m_dwCmd = pNote->m_dwCmd;
   pEvent->m_dwKeyCode = pNote->m_dwKeyCode;
   pEvent->m_dwFlags = pNote->m_dwFlags;
   DispatchEvent(pEvent);
   pEvent->Release();
 }
 
 void IFWL_Widget::DispatchEvent(CFWL_Event* pEvent) {
   if (m_pOuter) {
-    m_pOuter->GetCurrentDelegate()->OnProcessEvent(pEvent);
+    m_pOuter->GetDelegate()->OnProcessEvent(pEvent);
     return;
   }
   const IFWL_App* pApp = GetOwnerApp();
   if (!pApp)
     return;
   CFWL_NoteDriver* pNoteDriver = pApp->GetNoteDriver();
   if (!pNoteDriver)
     return;
   pNoteDriver->SendEvent(pEvent);
 }
@@ skipping 174 matching lines @@
   }
 }
 
 void CFWL_WidgetImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {}
 
 void CFWL_WidgetImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                           const CFX_Matrix* pMatrix) {
   CFWL_EvtDraw evt;
   evt.m_pGraphics = pGraphics;
 }