Remove FWL_WGTHITTEST_* defines in favour of enum class.

This Cl updates the FWL_WGTHITTEST_ defines to an enum class and fixes up any
code issues.

Review-Url: https://codereview.chromium.org/1948583002

20 files changed, 139 insertions, 158 deletions

diff --git a/xfa/fwl/basewidget/fwl_comboboximp.cpp b/xfa/fwl/basewidget/fwl_comboboximp.cpp
index 55f0910c4a..fd7c6d6266 100644
--- a/xfa/fwl/basewidget/fwl_comboboximp.cpp
+++ b/xfa/fwl/basewidget/fwl_comboboximp.cpp
@@ -593,7 +593,7 @@ FWL_ERR CFWL_ComboBoxImp::Update() {
           &part, CFWL_WidgetCapacity::ComboFormHandler));
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_ComboBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_ComboBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (m_pWidgetMgr->IsFormDisabled()) {
     return DisForm_HitTest(fx, fy);
   }
@@ -1254,23 +1254,20 @@ FWL_ERR CFWL_ComboBoxImp::DisForm_Update() {
   Layout();
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_ComboBoxImp::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_ComboBoxImp::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   CFX_RectF rect;
   rect.Set(0, 0, m_pProperties->m_rtWidget.width - m_rtBtn.width,
            m_pProperties->m_rtWidget.height);
-  if (rect.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Edit;
-  }
-  if (m_rtBtn.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
+  if (rect.Contains(fx, fy))
+    return FWL_WidgetHit::Edit;
+  if (m_rtBtn.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
   if (DisForm_IsDropListShowed()) {
     m_pListBox->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Client;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
   }
-  return FWL_WGTHITTEST_Unknown;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_ComboBoxImp::DisForm_DrawWidget(CFX_Graphics* pGraphics,
                                              const CFX_Matrix* pMatrix) {
diff --git a/xfa/fwl/basewidget/fwl_comboboximp.h b/xfa/fwl/basewidget/fwl_comboboximp.h
index 262db35082..a4138b27a8 100644
--- a/xfa/fwl/basewidget/fwl_comboboximp.h
+++ b/xfa/fwl/basewidget/fwl_comboboximp.h
@@ -93,7 +93,7 @@ class CFWL_ComboBoxImp : public CFWL_WidgetImp {
                                  uint32_t dwStylesExRemoved);
   virtual FWL_ERR SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE);
   virtual FWL_ERR Update();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   virtual FWL_ERR SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
@@ -153,7 +153,7 @@ class CFWL_ComboBoxImp : public CFWL_WidgetImp {
   FWL_ERR DisForm_ModifyStylesEx(uint32_t dwStylesExAdded,
                                  uint32_t dwStylesExRemoved);
   FWL_ERR DisForm_Update();
-  uint32_t DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_WidgetHit DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FWL_ERR DisForm_DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   FWL_ERR DisForm_GetBBox(CFX_RectF& rect);
diff --git a/xfa/fwl/basewidget/fwl_datetimepickerimp.cpp b/xfa/fwl/basewidget/fwl_datetimepickerimp.cpp
index 941b222789..84a4437fff 100644
--- a/xfa/fwl/basewidget/fwl_datetimepickerimp.cpp
+++ b/xfa/fwl/basewidget/fwl_datetimepickerimp.cpp
@@ -537,21 +537,18 @@ FWL_ERR CFWL_DateTimePickerImp::Update() {
   m_pMonthCal->Update();
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_DateTimePickerImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  if (m_pWidgetMgr->IsFormDisabled()) {
+FWL_WidgetHit CFWL_DateTimePickerImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (m_pWidgetMgr->IsFormDisabled())
     return DisForm_HitTest(fx, fy);
-  }
-  if (m_rtClient.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
+  if (m_rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
   if (IsMonthCalendarShowed()) {
     CFX_RectF rect;
     m_pMonthCal->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Client;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
   }
-  return FWL_WGTHITTEST_Unknown;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_DateTimePickerImp::DrawWidget(CFX_Graphics* pGraphics,
                                            const CFX_Matrix* pMatrix) {
@@ -907,26 +904,23 @@ void CFWL_DateTimePickerImp::DisForm_ShowMonthCalendar(FX_BOOL bActivate) {
   rtInvalidate.Inflate(2, 2);
   Repaint(&rtInvalidate);
 }
-uint32_t CFWL_DateTimePickerImp::DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_DateTimePickerImp::DisForm_HitTest(FX_FLOAT fx,
+                                                      FX_FLOAT fy) {
   CFX_RectF rect;
   rect.Set(0, 0, m_pProperties->m_rtWidget.width,
            m_pProperties->m_rtWidget.height);
-  if (rect.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Edit;
-  }
-  if (DisForm_IsNeedShowButton()) {
+  if (rect.Contains(fx, fy))
+    return FWL_WidgetHit::Edit;
+  if (DisForm_IsNeedShowButton())
     rect.width += m_fBtn;
-  }
-  if (rect.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
+  if (rect.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
   if (IsMonthCalendarShowed()) {
     m_pMonthCal->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Client;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::Client;
   }
-  return FWL_WGTHITTEST_Unknown;
+  return FWL_WidgetHit::Unknown;
 }
 FX_BOOL CFWL_DateTimePickerImp::DisForm_IsNeedShowButton() {
   FX_BOOL bFocus = m_pProperties->m_dwStates & FWL_WGTSTATE_Focused ||
diff --git a/xfa/fwl/basewidget/fwl_datetimepickerimp.h b/xfa/fwl/basewidget/fwl_datetimepickerimp.h
index 68e85050e4..7276928332 100644
--- a/xfa/fwl/basewidget/fwl_datetimepickerimp.h
+++ b/xfa/fwl/basewidget/fwl_datetimepickerimp.h
@@ -113,7 +113,7 @@ class CFWL_DateTimePickerImp : public CFWL_WidgetImp {
   virtual FWL_ERR Finalize();
   virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
   virtual FWL_ERR Update();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   virtual FWL_ERR SetThemeProvider(IFWL_ThemeProvider* pTP);
@@ -166,7 +166,7 @@ class CFWL_DateTimePickerImp : public CFWL_WidgetImp {
   void DisForm_InitDateTimeEdit();
   FX_BOOL DisForm_IsMonthCalendarShowed();
   void DisForm_ShowMonthCalendar(FX_BOOL bActivate);
-  uint32_t DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_WidgetHit DisForm_HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FX_BOOL DisForm_IsNeedShowButton();
   FWL_ERR DisForm_Update();
   FWL_ERR DisForm_GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
diff --git a/xfa/fwl/basewidget/fwl_editimp.cpp b/xfa/fwl/basewidget/fwl_editimp.cpp
index 29fab8b9b3..8b4dd39321 100644
--- a/xfa/fwl/basewidget/fwl_editimp.cpp
+++ b/xfa/fwl/basewidget/fwl_editimp.cpp
@@ -322,24 +322,24 @@ FWL_ERR CFWL_EditImp::Update() {
   return FWL_ERR_Succeeded;
 }
 
-uint32_t CFWL_EditImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_EditImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_OuterScrollbar) {
     if (IsShowScrollBar(TRUE)) {
       CFX_RectF rect;
       m_pVertScrollBar->GetWidgetRect(rect);
       if (rect.Contains(fx, fy))
-        return FWL_WGTHITTEST_VScrollBar;
+        return FWL_WidgetHit::VScrollBar;
     }
     if (IsShowScrollBar(FALSE)) {
       CFX_RectF rect;
       m_pHorzScrollBar->GetWidgetRect(rect);
       if (rect.Contains(fx, fy))
-        return FWL_WGTHITTEST_HScrollBar;
+        return FWL_WidgetHit::HScrollBar;
     }
   }
   if (m_rtClient.Contains(fx, fy))
-    return FWL_WGTHITTEST_Edit;
-  return FWL_WGTHITTEST_Unknown;
+    return FWL_WidgetHit::Edit;
+  return FWL_WidgetHit::Unknown;
 }
 
 void CFWL_EditImp::AddSpellCheckObj(CFX_Path& PathData,
diff --git a/xfa/fwl/basewidget/fwl_editimp.h b/xfa/fwl/basewidget/fwl_editimp.h
index 226a0e8b41..3732b48f1f 100644
--- a/xfa/fwl/basewidget/fwl_editimp.h
+++ b/xfa/fwl/basewidget/fwl_editimp.h
@@ -37,7 +37,7 @@ class CFWL_EditImp : public CFWL_WidgetImp {
   FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   FWL_ERR SetWidgetRect(const CFX_RectF& rect) override;
   FWL_ERR Update() override;
-  uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy) override;
   FWL_ERR SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE) override;
   FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                      const CFX_Matrix* pMatrix = NULL) override;
diff --git a/xfa/fwl/basewidget/fwl_listboximp.cpp b/xfa/fwl/basewidget/fwl_listboximp.cpp
index 9b5d2fc424..dd017e215f 100644
--- a/xfa/fwl/basewidget/fwl_listboximp.cpp
+++ b/xfa/fwl/basewidget/fwl_listboximp.cpp
@@ -142,25 +142,22 @@ FWL_ERR CFWL_ListBoxImp::Update() {
   CalcSize();
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_ListBoxImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (IsShowScrollBar(FALSE)) {
     CFX_RectF rect;
     m_pHorzScrollBar->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_HScrollBar;
-    }
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::HScrollBar;
   }
   if (IsShowScrollBar(TRUE)) {
     CFX_RectF rect;
     m_pVertScrollBar->GetWidgetRect(rect);
-    if (rect.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_VScrollBar;
-    }
-  }
-  if (m_rtClient.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
+    if (rect.Contains(fx, fy))
+      return FWL_WidgetHit::VScrollBar;
   }
-  return FWL_WGTHITTEST_Unknown;
+  if (m_rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_ListBoxImp::DrawWidget(CFX_Graphics* pGraphics,
                                     const CFX_Matrix* pMatrix) {
diff --git a/xfa/fwl/basewidget/fwl_listboximp.h b/xfa/fwl/basewidget/fwl_listboximp.h
index 1dd0db1b4c..65fbf6a45a 100644
--- a/xfa/fwl/basewidget/fwl_listboximp.h
+++ b/xfa/fwl/basewidget/fwl_listboximp.h
@@ -31,7 +31,7 @@ class CFWL_ListBoxImp : public CFWL_WidgetImp {
   virtual FWL_ERR Finalize();
   virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
   virtual FWL_ERR Update();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   virtual FWL_ERR SetThemeProvider(IFWL_ThemeProvider* pThemeProvider);
diff --git a/xfa/fwl/basewidget/fwl_spinbuttonimp.cpp b/xfa/fwl/basewidget/fwl_spinbuttonimp.cpp
index 434f6ddacf..5692087762 100644
--- a/xfa/fwl/basewidget/fwl_spinbuttonimp.cpp
+++ b/xfa/fwl/basewidget/fwl_spinbuttonimp.cpp
@@ -100,27 +100,22 @@ FWL_ERR CFWL_SpinButtonImp::Update() {
   }
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_SpinButtonImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  if (m_rtClient.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
-  if (HasBorder() && (m_rtClient.Contains(fx, fy))) {
-    return FWL_WGTHITTEST_Border;
-  }
+FWL_WidgetHit CFWL_SpinButtonImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  if (m_rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
+  if (HasBorder() && (m_rtClient.Contains(fx, fy)))
+    return FWL_WidgetHit::Border;
   if (HasEdge()) {
     CFX_RectF rtEdge;
     GetEdgeRect(rtEdge);
-    if (rtEdge.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Left;
-    }
-  }
-  if (m_rtUpButton.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_SPB_UpButton;
-  }
-  if (m_rtDnButton.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_SPB_DownButton;
-  }
-  return FWL_WGTHITTEST_Unknown;
+    if (rtEdge.Contains(fx, fy))
+      return FWL_WidgetHit::Left;
+  }
+  if (m_rtUpButton.Contains(fx, fy))
+    return FWL_WidgetHit::UpButton;
+  if (m_rtDnButton.Contains(fx, fy))
+    return FWL_WidgetHit::DownButton;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_SpinButtonImp::DrawWidget(CFX_Graphics* pGraphics,
                                        const CFX_Matrix* pMatrix) {
diff --git a/xfa/fwl/basewidget/fwl_spinbuttonimp.h b/xfa/fwl/basewidget/fwl_spinbuttonimp.h
index 71e2a6dd61..3f9dc77c4e 100644
--- a/xfa/fwl/basewidget/fwl_spinbuttonimp.h
+++ b/xfa/fwl/basewidget/fwl_spinbuttonimp.h
@@ -26,7 +26,7 @@ class CFWL_SpinButtonImp : public CFWL_WidgetImp, public IFWL_Timer {
   virtual FWL_ERR Finalize();
   virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
   virtual FWL_ERR Update();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   virtual int32_t Run(FWL_HTIMER hTimer);
diff --git a/xfa/fwl/basewidget/ifwl_spinbutton.h b/xfa/fwl/basewidget/ifwl_spinbutton.h
index b98e2255ff..2894d08197 100644
--- a/xfa/fwl/basewidget/ifwl_spinbutton.h
+++ b/xfa/fwl/basewidget/ifwl_spinbutton.h
@@ -12,8 +12,6 @@
 #define FWL_CLASS_SpinButton L"FWL_SPINBUTTON"
 #define FWL_CLASSHASH_SpinButton 3793043646
 #define FWL_STYLEEXE_SPB_Vert (1L << 0)
-#define FWL_WGTHITTEST_SPB_UpButton (FWL_WGTHITTEST_MAX + 1)
-#define FWL_WGTHITTEST_SPB_DownButton (FWL_WGTHITTEST_MAX + 2)
 
 BEGIN_FWL_EVENT_DEF(CFWL_EvtSpbClick, CFWL_EventType::Click)
 FX_BOOL m_bUp;
diff --git a/xfa/fwl/core/fwl_formimp.cpp b/xfa/fwl/core/fwl_formimp.cpp
index bbec673ed6..9b91deb140 100644
--- a/xfa/fwl/core/fwl_formimp.cpp
+++ b/xfa/fwl/core/fwl_formimp.cpp
@@ -197,69 +197,57 @@ FWL_ERR CFWL_FormImp::Update() {
   Layout();
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_FormImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
-  (void)GetAvailableTheme();
-  if (m_pCloseBox && m_pCloseBox->m_rtBtn.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_CloseBox;
-  }
-  if (m_pMaxBox && m_pMaxBox->m_rtBtn.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_MaxBox;
-  }
-  if (m_pMinBox && m_pMinBox->m_rtBtn.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_MinBox;
-  }
+FWL_WidgetHit CFWL_FormImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+  GetAvailableTheme();
+  if (m_pCloseBox && m_pCloseBox->m_rtBtn.Contains(fx, fy))
+    return FWL_WidgetHit::CloseBox;
+  if (m_pMaxBox && m_pMaxBox->m_rtBtn.Contains(fx, fy))
+    return FWL_WidgetHit::MaxBox;
+  if (m_pMinBox && m_pMinBox->m_rtBtn.Contains(fx, fy))
+    return FWL_WidgetHit::MinBox;
   CFX_RectF rtCap;
   rtCap.Set(m_rtCaption.left + m_fCYBorder, m_rtCaption.top + m_fCXBorder,
             m_rtCaption.width - FWL_SYSBTNSIZE * m_iSysBox - 2 * m_fCYBorder,
             m_rtCaption.height - m_fCXBorder);
-  if (rtCap.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Titlebar;
-  }
+  if (rtCap.Contains(fx, fy))
+    return FWL_WidgetHit::Titlebar;
   if ((m_pProperties->m_dwStyles & FWL_WGTSTYLE_Border) &&
       (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_FRM_Resize)) {
     FX_FLOAT fWidth = m_rtRelative.width - 2 * (m_fCYBorder + kCornerEnlarge);
     FX_FLOAT fHeight = m_rtRelative.height - 2 * (m_fCXBorder + kCornerEnlarge);
     CFX_RectF rt;
     rt.Set(0, m_fCXBorder + kCornerEnlarge, m_fCYBorder, fHeight);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Left;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::Left;
     rt.Set(m_rtRelative.width - m_fCYBorder, m_fCXBorder + kCornerEnlarge,
            m_fCYBorder, fHeight);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Right;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::Right;
     rt.Set(m_fCYBorder + kCornerEnlarge, 0, fWidth, m_fCXBorder);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Top;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::Top;
     rt.Set(m_fCYBorder + kCornerEnlarge, m_rtRelative.height - m_fCXBorder,
            fWidth, m_fCXBorder);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Bottom;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::Bottom;
     rt.Set(0, 0, m_fCYBorder + kCornerEnlarge, m_fCXBorder + kCornerEnlarge);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_LeftTop;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::LeftTop;
     rt.Set(0, m_rtRelative.height - m_fCXBorder - kCornerEnlarge,
            m_fCYBorder + kCornerEnlarge, m_fCXBorder + kCornerEnlarge);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_LeftBottom;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::LeftBottom;
     rt.Set(m_rtRelative.width - m_fCYBorder - kCornerEnlarge, 0,
            m_fCYBorder + kCornerEnlarge, m_fCXBorder + kCornerEnlarge);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_RightTop;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::RightTop;
     rt.Set(m_rtRelative.width - m_fCYBorder - kCornerEnlarge,
            m_rtRelative.height - m_fCXBorder - kCornerEnlarge,
            m_fCYBorder + kCornerEnlarge, m_fCXBorder + kCornerEnlarge);
-    if (rt.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_RightBottom;
-    }
+    if (rt.Contains(fx, fy))
+      return FWL_WidgetHit::RightBottom;
   }
-  return FWL_WGTHITTEST_Client;
+  return FWL_WidgetHit::Client;
 }
 FWL_ERR CFWL_FormImp::DrawWidget(CFX_Graphics* pGraphics,
                                  const CFX_Matrix* pMatrix) {
@@ -1140,7 +1128,7 @@ void CFWL_FormImpDelegate::OnMouseLeave(CFWL_MsgMouse* pMsg) {
 }
 void CFWL_FormImpDelegate::OnLButtonDblClk(CFWL_MsgMouse* pMsg) {
   if ((m_pOwner->m_pProperties->m_dwStyleExes & FWL_STYLEEXT_FRM_Resize) &&
-      m_pOwner->HitTest(pMsg->m_fx, pMsg->m_fy) == FWL_WGTHITTEST_Titlebar) {
+      m_pOwner->HitTest(pMsg->m_fx, pMsg->m_fy) == FWL_WidgetHit::Titlebar) {
     if (m_pOwner->m_bMaximized) {
       m_pOwner->SetWidgetRect(m_pOwner->m_rtRestore);
     } else {
diff --git a/xfa/fwl/core/fwl_formimp.h b/xfa/fwl/core/fwl_formimp.h
index dccdf7f2af..4ee3e0ddae 100644
--- a/xfa/fwl/core/fwl_formimp.h
+++ b/xfa/fwl/core/fwl_formimp.h
@@ -78,7 +78,7 @@ class CFWL_FormImp : public CFWL_WidgetImp {
   virtual FWL_ERR GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE);
   virtual FWL_ERR GetClientRect(CFX_RectF& rect);
   virtual FWL_ERR Update();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR DrawWidget(CFX_Graphics* pGraphics,
                              const CFX_Matrix* pMatrix = NULL);
   virtual FWL_FORMSIZE GetFormSize();
diff --git a/xfa/fwl/core/fwl_widgetdef.h b/xfa/fwl/core/fwl_widgetdef.h
index 3b858951e5..f0ef5f5d18 100644
--- a/xfa/fwl/core/fwl_widgetdef.h
+++ b/xfa/fwl/core/fwl_widgetdef.h
@@ -50,28 +50,7 @@
 #define FWL_WGTSTATE_Focused (1L << 4)
 #define FWL_WGTSTATE_Invisible (1L << 5)
 #define FWL_WGTSTATE_MAX (6)
-#define FWL_WGTHITTEST_Unknown 0
-#define FWL_WGTHITTEST_Client 1
-#define FWL_WGTHITTEST_Left 2
-#define FWL_WGTHITTEST_Top 3
-#define FWL_WGTHITTEST_Right 4
-#define FWL_WGTHITTEST_Bottom 5
-#define FWL_WGTHITTEST_LeftTop 6
-#define FWL_WGTHITTEST_RightTop 7
-#define FWL_WGTHITTEST_LeftBottom 8
-#define FWL_WGTHITTEST_RightBottom 9
-#define FWL_WGTHITTEST_Icon 10
-#define FWL_WGTHITTEST_Titlebar 11
-#define FWL_WGTHITTEST_MinBox 12
-#define FWL_WGTHITTEST_MaxBox 13
-#define FWL_WGTHITTEST_CloseBox 14
-#define FWL_WGTHITTEST_HScrollBar 15
-#define FWL_WGTHITTEST_VScrollBar 16
-#define FWL_WGTHITTEST_Border 17
-#define FWL_WGTHITTEST_Edge 18
-#define FWL_WGTHITTEST_Edit 19
-#define FWL_WGTHITTEST_HyperLink 20
-#define FWL_WGTHITTEST_MAX 21
+
 #define FWL_VKEY_LButton 0x01
 #define FWL_VKEY_RButton 0x02
 #define FWL_VKEY_MButton 0x04
diff --git a/xfa/fwl/core/fwl_widgetimp.cpp b/xfa/fwl/core/fwl_widgetimp.cpp
index 38516c6557..b9db4f984e 100644
--- a/xfa/fwl/core/fwl_widgetimp.cpp
+++ b/xfa/fwl/core/fwl_widgetimp.cpp
@@ -118,7 +118,7 @@ FWL_ERR IFWL_Widget::LockUpdate() {
 FWL_ERR IFWL_Widget::UnlockUpdate() {
   return static_cast<CFWL_WidgetImp*>(GetImpl())->UnlockUpdate();
 }
-uint32_t IFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit IFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   return static_cast<CFWL_WidgetImp*>(GetImpl())->HitTest(fx, fy);
 }
 FWL_ERR IFWL_Widget::TransformTo(IFWL_Widget* pWidget,
@@ -365,27 +365,24 @@ FWL_ERR CFWL_WidgetImp::UnlockUpdate() {
   }
   return FWL_ERR_Succeeded;
 }
-uint32_t CFWL_WidgetImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_WidgetImp::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   CFX_RectF rtClient;
   GetClientRect(rtClient);
-  if (rtClient.Contains(fx, fy)) {
-    return FWL_WGTHITTEST_Client;
-  }
+  if (rtClient.Contains(fx, fy))
+    return FWL_WidgetHit::Client;
   if (HasEdge()) {
     CFX_RectF rtEdge;
     GetEdgeRect(rtEdge);
-    if (rtEdge.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Edge;
-    }
+    if (rtEdge.Contains(fx, fy))
+      return FWL_WidgetHit::Edge;
   }
   if (HasBorder()) {
     CFX_RectF rtRelative;
     GetRelativeRect(rtRelative);
-    if (rtRelative.Contains(fx, fy)) {
-      return FWL_WGTHITTEST_Border;
-    }
+    if (rtRelative.Contains(fx, fy))
+      return FWL_WidgetHit::Border;
   }
-  return FWL_WGTHITTEST_Unknown;
+  return FWL_WidgetHit::Unknown;
 }
 FWL_ERR CFWL_WidgetImp::TransformTo(IFWL_Widget* pWidget,
                                     FX_FLOAT& fx,
diff --git a/xfa/fwl/core/fwl_widgetimp.h b/xfa/fwl/core/fwl_widgetimp.h
index 9381a4203d..3eddfa51c2 100644
--- a/xfa/fwl/core/fwl_widgetimp.h
+++ b/xfa/fwl/core/fwl_widgetimp.h
@@ -12,6 +12,7 @@
 #include "xfa/fwl/core/cfwl_event.h"
 #include "xfa/fwl/core/cfwl_themepart.h"
 #include "xfa/fwl/core/ifwl_widgetdelegate.h"
+#include "xfa/fwl/core/include/fwl_widgethit.h"
 #include "xfa/fwl/theme/cfwl_widgettp.h"
 
 class CFWL_AppImp;
@@ -57,7 +58,7 @@ class CFWL_WidgetImp {
   virtual FWL_ERR Update();
   virtual FWL_ERR LockUpdate();
   virtual FWL_ERR UnlockUpdate();
-  virtual uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  virtual FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   virtual FWL_ERR TransformTo(IFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
   virtual FWL_ERR TransformTo(IFWL_Widget* pWidget, CFX_RectF& rt);
   virtual FWL_ERR GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);
diff --git a/xfa/fwl/core/ifwl_widget.h b/xfa/fwl/core/ifwl_widget.h
index ea57c4e3fa..62f7155c5d 100644
--- a/xfa/fwl/core/ifwl_widget.h
+++ b/xfa/fwl/core/ifwl_widget.h
@@ -61,7 +61,7 @@ class IFWL_Widget {
   FWL_ERR Update();
   FWL_ERR LockUpdate();
   FWL_ERR UnlockUpdate();
-  uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FWL_ERR TransformTo(IFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
   FWL_ERR TransformTo(IFWL_Widget* pWidget, CFX_RectF& rt);
   FWL_ERR GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);
diff --git a/xfa/fwl/core/include/fwl_widgethit.h b/xfa/fwl/core/include/fwl_widgethit.h
new file mode 100644
index 0000000000..102024a510
--- /dev/null
+++ b/xfa/fwl/core/include/fwl_widgethit.h
@@ -0,0 +1,35 @@
+// Copyright 2016 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
+
+#ifndef XFA_FWL_CORE_INCLUDE_FWL_WIDGETHIT_H_
+#define XFA_FWL_CORE_INCLUDE_FWL_WIDGETHIT_H_
+
+enum class FWL_WidgetHit {
+  Unknown = 0,
+  Client,
+  Left,
+  Top,
+  Right,
+  Bottom,
+  LeftTop,
+  RightTop,
+  LeftBottom,
+  RightBottom,
+  Titlebar,
+  MinBox,
+  MaxBox,
+  CloseBox,
+  HScrollBar,
+  VScrollBar,
+  Border,
+  Edge,
+  Edit,
+  HyperLink,
+  UpButton,
+  DownButton
+};
+
+#endif  // XFA_FWL_CORE_INCLUDE_FWL_WIDGETHIT_H_
diff --git a/xfa/fwl/lightwidget/cfwl_widget.cpp b/xfa/fwl/lightwidget/cfwl_widget.cpp
index 98a5a22f43..ff28b37646 100644
--- a/xfa/fwl/lightwidget/cfwl_widget.cpp
+++ b/xfa/fwl/lightwidget/cfwl_widget.cpp
@@ -164,9 +164,9 @@ FWL_ERR CFWL_Widget::UnlockUpdate() {
   return m_pIface->UnlockUpdate();
 }
 
-uint32_t CFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
+FWL_WidgetHit CFWL_Widget::HitTest(FX_FLOAT fx, FX_FLOAT fy) {
   if (!m_pIface)
-    return 0;
+    return FWL_WidgetHit::Unknown;
   return m_pIface->HitTest(fx, fy);
 }
 
diff --git a/xfa/fwl/lightwidget/cfwl_widget.h b/xfa/fwl/lightwidget/cfwl_widget.h
index f1b6715811..19b22c6f29 100644
--- a/xfa/fwl/lightwidget/cfwl_widget.h
+++ b/xfa/fwl/lightwidget/cfwl_widget.h
@@ -46,7 +46,7 @@ class CFWL_Widget {
   FWL_ERR Update();
   FWL_ERR LockUpdate();
   FWL_ERR UnlockUpdate();
-  uint32_t HitTest(FX_FLOAT fx, FX_FLOAT fy);
+  FWL_WidgetHit HitTest(FX_FLOAT fx, FX_FLOAT fy);
   FWL_ERR TransformTo(CFWL_Widget* pWidget, FX_FLOAT& fx, FX_FLOAT& fy);
   FWL_ERR TransformTo(CFWL_Widget* pWidget, CFX_RectF& rt);
   FWL_ERR GetMatrix(CFX_Matrix& matrix, FX_BOOL bGlobal = FALSE);