Change IFWL_Widget to store a single delegate.

xfa/fxfa/app/xfa_fftextedit.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/fxfa/app/xfa_fftextedit.h"
 
 #include <vector>
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/cfwl_datetimepicker.h"
 #include "xfa/fwl/core/cfwl_edit.h"
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
 #include "xfa/fwl/core/ifwl_edit.h"
+#include "xfa/fxfa/app/cxfa_ffdatetimeeditdelegate.h"
+#include "xfa/fxfa/app/cxfa_ffnumericeditdelegate.h"
+#include "xfa/fxfa/app/cxfa_fftexteditdelegate.h"
 #include "xfa/fxfa/app/xfa_fffield.h"
 #include "xfa/fxfa/app/xfa_fwladapter.h"
 #include "xfa/fxfa/app/xfa_textlayout.h"
 #include "xfa/fxfa/cxfa_eventparam.h"
 #include "xfa/fxfa/parser/xfa_localevalue.h"
 #include "xfa/fxfa/xfa_ffapp.h"
 #include "xfa/fxfa/xfa_ffdoc.h"
 #include "xfa/fxfa/xfa_ffdocview.h"
 #include "xfa/fxfa/xfa_ffpageview.h"
 #include "xfa/fxfa/xfa_ffwidget.h"
 
 CXFA_FFTextEdit::CXFA_FFTextEdit(CXFA_FFPageView* pPageView,
                                  CXFA_WidgetAcc* pDataAcc)
-    : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(nullptr) {}
+    : CXFA_FFField(pPageView, pDataAcc) {}
 
 CXFA_FFTextEdit::~CXFA_FFTextEdit() {
   if (m_pNormalWidget) {
     IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
     CFWL_NoteDriver* pNoteDriver = pWidget->GetOwnerApp()->GetNoteDriver();
     pNoteDriver->UnregisterEventTarget(pWidget);
   }
 }
 
 FX_BOOL CXFA_FFTextEdit::LoadWidget() {
   CFWL_Edit* pFWLEdit = new CFWL_Edit(GetFWLApp());
   pFWLEdit->Initialize();
   m_pNormalWidget = pFWLEdit;
   m_pNormalWidget->SetLayoutItem(this);
 
   IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
   CFWL_NoteDriver* pNoteDriver = pWidget->GetOwnerApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pWidget, pWidget);
 
-  m_pOldDelegate = m_pNormalWidget->GetCurrentDelegate();
-  m_pNormalWidget->SetCurrentDelegate(this);
+  m_pNormalWidget->SetDelegate(pdfium::MakeUnique<CXFA_FFTextEditDelegate>(
+      m_pNormalWidget->ReleaseDelegate(), this));
   m_pNormalWidget->LockUpdate();
 
   UpdateWidgetProperty();
   CFX_WideString wsText;
   m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Display);
   pFWLEdit->SetText(wsText);
   m_pNormalWidget->UnlockUpdate();
   return CXFA_FFField::LoadWidget();
 }
 void CXFA_FFTextEdit::UpdateWidgetProperty() {
@@ skipping 330 matching lines @@
   eParam.m_pTarget = m_pDataAcc;
   m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_Full, &eParam);
 }
 
 FX_BOOL CXFA_FFTextEdit::CheckWord(const CFX_ByteStringC& sWord) {
   if (sWord.IsEmpty() || m_pDataAcc->GetUIType() != XFA_Element::TextEdit)
     return TRUE;
   return FALSE;
 }
 
-void CXFA_FFTextEdit::OnProcessMessage(CFWL_Message* pMessage) {
-  m_pOldDelegate->OnProcessMessage(pMessage);
-}
-
-void CXFA_FFTextEdit::OnProcessEvent(CFWL_Event* pEvent) {
-  CXFA_FFField::OnProcessEvent(pEvent);
-  switch (pEvent->GetClassID()) {
-    case CFWL_EventType::TextChanged: {
-      CFWL_EvtEdtTextChanged* event = (CFWL_EvtEdtTextChanged*)pEvent;
-      CFX_WideString wsChange;
-      OnTextChanged(m_pNormalWidget->GetWidget(), wsChange, event->wsPrevText);
-      break;
-    }
-    case CFWL_EventType::TextFull: {
-      OnTextFull(m_pNormalWidget->GetWidget());
-      break;
-    }
-    case CFWL_EventType::CheckWord: {
-      CFX_WideString wstr(L"FWL_EVENT_DTP_SelectChanged");
-      CFWL_EvtEdtCheckWord* event = (CFWL_EvtEdtCheckWord*)pEvent;
-      event->bCheckWord = CheckWord(event->bsWord.AsStringC());
-      break;
-    }
-    case CFWL_EventType::GetSuggestedWords: {
-      CFWL_EvtEdtGetSuggestWords* event = (CFWL_EvtEdtGetSuggestWords*)pEvent;
-      event->bSuggestWords = FALSE;
-      break;
-    }
-    default:
-      break;
-  }
-  m_pOldDelegate->OnProcessEvent(pEvent);
-}
-
-void CXFA_FFTextEdit::OnDrawWidget(CFX_Graphics* pGraphics,
-                                   const CFX_Matrix* pMatrix) {
-  m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
-}
-
 CXFA_FFNumericEdit::CXFA_FFNumericEdit(CXFA_FFPageView* pPageView,
                                        CXFA_WidgetAcc* pDataAcc)
     : CXFA_FFTextEdit(pPageView, pDataAcc) {}
+
 CXFA_FFNumericEdit::~CXFA_FFNumericEdit() {}
+
 FX_BOOL CXFA_FFNumericEdit::LoadWidget() {
   CFWL_Edit* pWidget = new CFWL_Edit(GetFWLApp());
   pWidget->Initialize();
   m_pNormalWidget = pWidget;
 
   IFWL_Widget* pIWidget = m_pNormalWidget->GetWidget();
   m_pNormalWidget->SetLayoutItem(this);
   CFWL_NoteDriver* pNoteDriver = pIWidget->GetOwnerApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pIWidget, pIWidget);
 
-  m_pOldDelegate = m_pNormalWidget->GetCurrentDelegate();
-  m_pNormalWidget->SetCurrentDelegate(this);
+  m_pNormalWidget->SetDelegate(pdfium::MakeUnique<CXFA_FFNumericEditDelegate>(
+      m_pNormalWidget->ReleaseDelegate(), this));
   m_pNormalWidget->LockUpdate();
 
   CFX_WideString wsText;
   m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Display);
   pWidget->SetText(wsText);
   UpdateWidgetProperty();
   m_pNormalWidget->UnlockUpdate();
   return CXFA_FFField::LoadWidget();
 }
 void CXFA_FFNumericEdit::UpdateWidgetProperty() {
@@ skipping 15 matching lines @@
     pWidget->SetLimit(iNumCells);
   }
   dwExtendedStyle |= GetAlignment();
   if (m_pDataAcc->GetAccess() != XFA_ATTRIBUTEENUM_Open ||
       !m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     dwExtendedStyle |= FWL_STYLEEXT_EDT_ReadOnly;
   }
   m_pNormalWidget->ModifyStylesEx(dwExtendedStyle, 0xFFFFFFFF);
 }
 
-void CXFA_FFNumericEdit::OnProcessEvent(CFWL_Event* pEvent) {
-  if (pEvent->GetClassID() == CFWL_EventType::Validate) {
-    CFWL_EvtEdtValidate* event = (CFWL_EvtEdtValidate*)pEvent;
-    CFX_WideString wsChange = event->wsInsert;
-    event->bValidate = OnValidate(m_pNormalWidget->GetWidget(), wsChange);
-    return;
-  }
-  CXFA_FFTextEdit::OnProcessEvent(pEvent);
-}
-
 FX_BOOL CXFA_FFNumericEdit::OnValidate(IFWL_Widget* pWidget,
                                        CFX_WideString& wsText) {
   CFX_WideString wsPattern;
   m_pDataAcc->GetPictureContent(wsPattern, XFA_VALUEPICTURE_Edit);
   if (!wsPattern.IsEmpty()) {
     return TRUE;
   }
   int32_t iLeads = 0;
   m_pDataAcc->GetLeadDigits(iLeads);
   int32_t iFracs = 0;
@@ skipping 13 matching lines @@
 FX_BOOL CXFA_FFPasswordEdit::LoadWidget() {
   CFWL_Edit* pWidget = new CFWL_Edit(GetFWLApp());
   pWidget->Initialize();
   m_pNormalWidget = pWidget;
   m_pNormalWidget->SetLayoutItem(this);
 
   IFWL_Widget* pIWidget = m_pNormalWidget->GetWidget();
   CFWL_NoteDriver* pNoteDriver = pIWidget->GetOwnerApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pIWidget, pIWidget);
 
-  m_pOldDelegate = m_pNormalWidget->GetCurrentDelegate();
-  m_pNormalWidget->SetCurrentDelegate(this);
+  m_pNormalWidget->SetDelegate(pdfium::MakeUnique<CXFA_FFTextEditDelegate>(
+      m_pNormalWidget->ReleaseDelegate(), this));
   m_pNormalWidget->LockUpdate();
 
   CFX_WideString wsText;
   m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Display);
   pWidget->SetText(wsText);
   UpdateWidgetProperty();
   m_pNormalWidget->UnlockUpdate();
   return CXFA_FFField::LoadWidget();
 }
 void CXFA_FFPasswordEdit::UpdateWidgetProperty() {
@@ skipping 47 matching lines @@
 }
 FX_BOOL CXFA_FFDateTimeEdit::LoadWidget() {
   CFWL_DateTimePicker* pWidget = new CFWL_DateTimePicker(GetFWLApp());
   pWidget->Initialize();
   m_pNormalWidget = pWidget;
   m_pNormalWidget->SetLayoutItem(this);
   IFWL_Widget* pIWidget = m_pNormalWidget->GetWidget();
   CFWL_NoteDriver* pNoteDriver = pIWidget->GetOwnerApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pIWidget, pIWidget);
 
-  m_pOldDelegate = m_pNormalWidget->GetCurrentDelegate();
-  m_pNormalWidget->SetCurrentDelegate(this);
+  m_pNormalWidget->SetDelegate(pdfium::MakeUnique<CXFA_FFDateTimeEditDelegate>(
+      m_pNormalWidget->ReleaseDelegate(), this));
   m_pNormalWidget->LockUpdate();
 
   CFX_WideString wsText;
   m_pDataAcc->GetValue(wsText, XFA_VALUEPICTURE_Display);
   pWidget->SetEditText(wsText);
   if (CXFA_Value value = m_pDataAcc->GetFormValue()) {
     switch (value.GetChildValueClassID()) {
       case XFA_Element::Date: {
         if (!wsText.IsEmpty()) {
           CXFA_LocaleValue lcValue = XFA_GetLocaleValue(m_pDataAcc);
@@ skipping 176 matching lines @@
   CFWL_DateTimePicker* pDateTime = (CFWL_DateTimePicker*)m_pNormalWidget;
   pDateTime->SetEditText(wsDate);
   pDateTime->Update();
   GetDoc()->GetDocEnvironment()->SetFocusWidget(GetDoc(), nullptr);
   CXFA_EventParam eParam;
   eParam.m_eType = XFA_EVENT_Change;
   eParam.m_pTarget = m_pDataAcc;
   m_pDataAcc->GetValue(eParam.m_wsNewText, XFA_VALUEPICTURE_Raw);
   m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_Change, &eParam);
 }
-
-void CXFA_FFDateTimeEdit::OnProcessEvent(CFWL_Event* pEvent) {
-  if (pEvent->GetClassID() == CFWL_EventType::SelectChanged) {
-    CFWL_Event_DtpSelectChanged* event = (CFWL_Event_DtpSelectChanged*)pEvent;
-    OnSelectChanged(m_pNormalWidget->GetWidget(), event->iYear, event->iMonth,
-                    event->iDay);
-    return;
-  }
-  CXFA_FFTextEdit::OnProcessEvent(pEvent);
-}