Cleanup FWL Event and Message code.

xfa/fxfa/app/xfa_fffield.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_fffield.h"
 
 #include "xfa/fwl/core/cfwl_edit.h"
 #include "xfa/fwl/core/cfwl_evtmouse.h"
@@ skipping 331 matching lines @@
     if (rtUi.height < fFontSize) {
       rtUi.height = fFontSize;
     }
   }
   m_pNormalWidget->SetWidgetRect(rtUi);
 }
 bool CXFA_FFField::OnMouseEnter() {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::Enter;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnMouseExit() {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::Leave;
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 void CXFA_FFField::FWLToClient(FX_FLOAT& fx, FX_FLOAT& fy) {
   if (!m_pNormalWidget) {
     return;
   }
   CFX_RectF rtWidget;
   m_pNormalWidget->GetWidgetRect(rtWidget);
   fx -= rtWidget.left;
   fy -= rtWidget.top;
 }
 bool CXFA_FFField::OnLButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
   if (m_pDataAcc->GetAccess() != XFA_ATTRIBUTEENUM_Open ||
       !m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     return false;
   }
   if (!PtInActiveRect(fx, fy)) {
     return false;
   }
   SetButtonDown(true);
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::LeftButtonDown;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnLButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
   if (!IsButtonDown()) {
     return false;
   }
   SetButtonDown(false);
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::LeftButtonUp;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnLButtonDblClk(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::LeftButtonDblClk;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnMouseMove(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::Move;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnMouseWheel(uint32_t dwFlags,
                                 int16_t zDelta,
                                 FX_FLOAT fx,
                                 FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouseWheel ms;
+  CFWL_MsgMouseWheel ms(nullptr, m_pNormalWidget);
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
   ms.m_fDeltaX = zDelta;
   ms.m_fDeltaY = 0;
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnRButtonDown(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
   if (m_pDataAcc->GetAccess() != XFA_ATTRIBUTEENUM_Open ||
       !m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     return false;
   }
   if (!PtInActiveRect(fx, fy)) {
     return false;
   }
   SetButtonDown(true);
-  CFWL_MsgMouse ms;
+
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::RightButtonDown;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnRButtonUp(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
   if (!IsButtonDown()) {
     return false;
   }
   SetButtonDown(false);
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::RightButtonUp;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnRButtonDblClk(uint32_t dwFlags, FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgMouse ms;
+  CFWL_MsgMouse ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_MouseCommand::RightButtonDblClk;
   ms.m_dwFlags = dwFlags;
   ms.m_fx = fx;
   ms.m_fy = fy;
   FWLToClient(ms.m_fx, ms.m_fy);
-  ms.m_pDstTarget = m_pNormalWidget;
   TranslateFWLMessage(&ms);
   return true;
 }
 
 bool CXFA_FFField::OnSetFocus(CXFA_FFWidget* pOldWidget) {
   CXFA_FFWidget::OnSetFocus(pOldWidget);
   if (!m_pNormalWidget) {
     return false;
   }
-  CFWL_MsgSetFocus ms;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
+  CFWL_MsgSetFocus ms(nullptr, m_pNormalWidget);
   TranslateFWLMessage(&ms);
   m_dwStatus |= XFA_WidgetStatus_Focused;
   AddInvalidateRect();
   return true;
 }
 bool CXFA_FFField::OnKillFocus(CXFA_FFWidget* pNewWidget) {
   if (!m_pNormalWidget) {
     return CXFA_FFWidget::OnKillFocus(pNewWidget);
   }
-  CFWL_MsgKillFocus ms;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
+  CFWL_MsgKillFocus ms(nullptr, m_pNormalWidget);
   TranslateFWLMessage(&ms);
   m_dwStatus &= ~XFA_WidgetStatus_Focused;
   AddInvalidateRect();
   CXFA_FFWidget::OnKillFocus(pNewWidget);
   return true;
 }
 bool CXFA_FFField::OnKeyDown(uint32_t dwKeyCode, uint32_t dwFlags) {
   if (!m_pNormalWidget || !m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     return false;
   }
-  CFWL_MsgKey ms;
+  CFWL_MsgKey ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_KeyCommand::KeyDown;
   ms.m_dwFlags = dwFlags;
   ms.m_dwKeyCode = dwKeyCode;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnKeyUp(uint32_t dwKeyCode, uint32_t dwFlags) {
   if (!m_pNormalWidget || !m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     return false;
   }
-  CFWL_MsgKey ms;
+  CFWL_MsgKey ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_KeyCommand::KeyUp;
   ms.m_dwFlags = dwFlags;
   ms.m_dwKeyCode = dwKeyCode;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
   TranslateFWLMessage(&ms);
   return true;
 }
 bool CXFA_FFField::OnChar(uint32_t dwChar, uint32_t dwFlags) {
   if (!m_pDataAcc->GetDoc()->GetXFADoc()->IsInteractive()) {
     return false;
   }
   if (dwChar == FWL_VKEY_Tab) {
     return true;
   }
   if (!m_pNormalWidget) {
     return false;
   }
   if (m_pDataAcc->GetAccess() != XFA_ATTRIBUTEENUM_Open) {
     return false;
   }
-  CFWL_MsgKey ms;
+  CFWL_MsgKey ms(nullptr, m_pNormalWidget);
   ms.m_dwCmd = FWL_KeyCommand::Char;
   ms.m_dwFlags = dwFlags;
   ms.m_dwKeyCode = dwChar;
-  ms.m_pDstTarget = m_pNormalWidget;
-  ms.m_pSrcTarget = nullptr;
   TranslateFWLMessage(&ms);
   return true;
 }
 FWL_WidgetHit CXFA_FFField::OnHitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (m_pNormalWidget) {
     FX_FLOAT ffx = fx, ffy = fy;
     FWLToClient(ffx, ffy);
     if (m_pNormalWidget->HitTest(ffx, ffy) != FWL_WidgetHit::Unknown)
       return FWL_WidgetHit::Client;
   }
@@ skipping 172 matching lines @@
 }
 bool CXFA_FFField::IsDataChanged() {
   return false;
 }
 void CXFA_FFField::TranslateFWLMessage(CFWL_Message* pMessage) {
   GetApp()->GetWidgetMgrDelegate()->OnProcessMessageToForm(pMessage);
 }
 void CXFA_FFField::OnProcessMessage(CFWL_Message* pMessage) {}
 
 void CXFA_FFField::OnProcessEvent(CFWL_Event* pEvent) {
-  switch (pEvent->GetClassID()) {
-    case CFWL_EventType::Mouse: {
+  switch (pEvent->GetType()) {
+    case CFWL_Event::Type::Mouse: {
       CFWL_EvtMouse* event = (CFWL_EvtMouse*)pEvent;
       if (event->m_dwCmd == FWL_MouseCommand::Enter) {
         CXFA_EventParam eParam;
         eParam.m_eType = XFA_EVENT_MouseEnter;
         eParam.m_pTarget = m_pDataAcc;
         m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_MouseEnter, &eParam);
       } else if (event->m_dwCmd == FWL_MouseCommand::Leave) {
         CXFA_EventParam eParam;
         eParam.m_eType = XFA_EVENT_MouseExit;
         eParam.m_pTarget = m_pDataAcc;
         m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_MouseExit, &eParam);
       } else if (event->m_dwCmd == FWL_MouseCommand::LeftButtonDown) {
         CXFA_EventParam eParam;
         eParam.m_eType = XFA_EVENT_MouseDown;
         eParam.m_pTarget = m_pDataAcc;
         m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_MouseDown, &eParam);
       } else if (event->m_dwCmd == FWL_MouseCommand::LeftButtonUp) {
         CXFA_EventParam eParam;
         eParam.m_eType = XFA_EVENT_MouseUp;
         eParam.m_pTarget = m_pDataAcc;
         m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_MouseUp, &eParam);
       }
       break;
     }
-    case CFWL_EventType::Click: {
+    case CFWL_Event::Type::Click: {
       CXFA_EventParam eParam;
       eParam.m_eType = XFA_EVENT_Click;
       eParam.m_pTarget = m_pDataAcc;
       m_pDataAcc->ProcessEvent(XFA_ATTRIBUTEENUM_Click, &eParam);
       break;
     }
     default:
       break;
   }
 }
 
 void CXFA_FFField::OnDrawWidget(CFX_Graphics* pGraphics,
                                 const CFX_Matrix* pMatrix) {}