Rename CPDFSDK_Annot::GetType to CPDFSDK_Annot::GetAnnotSubtype.

CPDFSDK_Annot::GetType should be renamed to GetAnnotSubtype as it returns
annotation subtype. Also, CPDFSDK_Annot::GetSubType is only used to check if
the annotation is signature widget. Thus, change the method to
IsSignatureWidget.  Lastly, rename CPDF_Annot::GetSubType to
CPDF_Annot::GetSubtype to match with spec.

Review-Url: https://codereview.chromium.org/2287703002

20 files changed, 72 insertions, 89 deletions

diff --git a/fpdfsdk/cba_annotiterator.cpp b/fpdfsdk/cba_annotiterator.cpp
index bd68997ad9..773fe610cd 100644
--- a/fpdfsdk/cba_annotiterator.cpp
+++ b/fpdfsdk/cba_annotiterator.cpp
@@ -23,12 +23,10 @@ bool CBA_AnnotIterator::CompareByTopDescending(const CPDFSDK_Annot* p1,
 }
 
 CBA_AnnotIterator::CBA_AnnotIterator(CPDFSDK_PageView* pPageView,
-                                     const CFX_ByteString& sType,
-                                     const CFX_ByteString& sSubType)
+                                     const CFX_ByteString& sAnnotSubtype)
     : m_eTabOrder(STRUCTURE),
       m_pPageView(pPageView),
-      m_sType(sType),
-      m_sSubType(sSubType) {
+      m_sAnnotSubtype(sAnnotSubtype) {
   CPDF_Page* pPDFPage = m_pPageView->GetPDFPage();
   CFX_ByteString sTabs = pPDFPage->m_pFormDict->GetStringBy("Tabs");
   if (sTabs == "R")
@@ -73,7 +71,8 @@ void CBA_AnnotIterator::GenerateResults() {
     case STRUCTURE: {
       for (size_t i = 0; i < m_pPageView->CountAnnots(); ++i) {
         CPDFSDK_Annot* pAnnot = m_pPageView->GetAnnot(i);
-        if (pAnnot->GetType() == m_sType && pAnnot->GetSubType() == m_sSubType)
+        if (pAnnot->GetAnnotSubtype() == m_sAnnotSubtype &&
+            !pAnnot->IsSignatureWidget())
           m_Annots.push_back(pAnnot);
       }
       break;
@@ -82,7 +81,8 @@ void CBA_AnnotIterator::GenerateResults() {
       std::vector<CPDFSDK_Annot*> sa;
       for (size_t i = 0; i < m_pPageView->CountAnnots(); ++i) {
         CPDFSDK_Annot* pAnnot = m_pPageView->GetAnnot(i);
-        if (pAnnot->GetType() == m_sType && pAnnot->GetSubType() == m_sSubType)
+        if (pAnnot->GetAnnotSubtype() == m_sAnnotSubtype &&
+            !pAnnot->IsSignatureWidget())
           sa.push_back(pAnnot);
       }
 
@@ -123,7 +123,8 @@ void CBA_AnnotIterator::GenerateResults() {
       std::vector<CPDFSDK_Annot*> sa;
       for (size_t i = 0; i < m_pPageView->CountAnnots(); ++i) {
         CPDFSDK_Annot* pAnnot = m_pPageView->GetAnnot(i);
-        if (pAnnot->GetType() == m_sType && pAnnot->GetSubType() == m_sSubType)
+        if (pAnnot->GetAnnotSubtype() == m_sAnnotSubtype &&
+            !pAnnot->IsSignatureWidget())
           sa.push_back(pAnnot);
       }
 
diff --git a/fpdfsdk/cpdfsdk_annot.cpp b/fpdfsdk/cpdfsdk_annot.cpp
index 36bec1553e..5ca439d8f7 100644
--- a/fpdfsdk/cpdfsdk_annot.cpp
+++ b/fpdfsdk/cpdfsdk_annot.cpp
@@ -58,12 +58,12 @@ CPDF_Annot* CPDFSDK_Annot::GetPDFAnnot() const {
   return nullptr;
 }
 
-CFX_ByteString CPDFSDK_Annot::GetType() const {
+CFX_ByteString CPDFSDK_Annot::GetAnnotSubtype() const {
   return "";
 }
 
-CFX_ByteString CPDFSDK_Annot::GetSubType() const {
-  return "";
+bool CPDFSDK_Annot::IsSignatureWidget() const {
+  return false;
 }
 
 void CPDFSDK_Annot::SetRect(const CFX_FloatRect& rect) {}
diff --git a/fpdfsdk/cpdfsdk_annothandlermgr.cpp b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
index bca2c9baa9..e7744bfa46 100644
--- a/fpdfsdk/cpdfsdk_annothandlermgr.cpp
+++ b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
@@ -53,7 +53,7 @@ CPDFSDK_Annot* CPDFSDK_AnnotHandlerMgr::NewAnnot(CPDF_Annot* pAnnot,
   ASSERT(pPageView);
 
   if (IPDFSDK_AnnotHandler* pAnnotHandler =
-          GetAnnotHandler(pAnnot->GetSubType())) {
+          GetAnnotHandler(pAnnot->GetSubtype())) {
     return pAnnotHandler->NewAnnot(pAnnot, pPageView);
   }
 
@@ -106,7 +106,7 @@ IPDFSDK_AnnotHandler* CPDFSDK_AnnotHandlerMgr::GetAnnotHandler(
     CPDFSDK_Annot* pAnnot) const {
   CPDF_Annot* pPDFAnnot = pAnnot->GetPDFAnnot();
   if (pPDFAnnot)
-    return GetAnnotHandler(pPDFAnnot->GetSubType());
+    return GetAnnotHandler(pPDFAnnot->GetSubtype());
 #ifdef PDF_ENABLE_XFA
   if (pAnnot->GetXFAWidget())
     return GetAnnotHandler(FSDK_XFAWIDGET_TYPENAME);
@@ -359,7 +359,8 @@ CPDFSDK_Annot* CPDFSDK_AnnotHandlerMgr::GetNextAnnot(CPDFSDK_Annot* pSDKAnnot,
   if (!pPage)
     return nullptr;
   if (pPage->GetPDFPage()) {  // for pdf annots.
-    CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), pSDKAnnot->GetType(), "");
+    CBA_AnnotIterator ai(pSDKAnnot->GetPageView(),
+                         pSDKAnnot->GetAnnotSubtype());
     CPDFSDK_Annot* pNext =
         bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
     return pNext;
@@ -381,7 +382,7 @@ CPDFSDK_Annot* CPDFSDK_AnnotHandlerMgr::GetNextAnnot(CPDFSDK_Annot* pSDKAnnot,
 
   return pPageView->GetAnnotByXFAWidget(hNextFocus);
 #else   // PDF_ENABLE_XFA
-  CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), "Widget", "");
+  CBA_AnnotIterator ai(pSDKAnnot->GetPageView(), "Widget");
   return bNext ? ai.GetNextAnnot(pSDKAnnot) : ai.GetPrevAnnot(pSDKAnnot);
 #endif  // PDF_ENABLE_XFA
 }
diff --git a/fpdfsdk/cpdfsdk_baannot.cpp b/fpdfsdk/cpdfsdk_baannot.cpp
index 99dd2e0538..d1d3a0f63a 100644
--- a/fpdfsdk/cpdfsdk_baannot.cpp
+++ b/fpdfsdk/cpdfsdk_baannot.cpp
@@ -38,12 +38,8 @@ CFX_FloatRect CPDFSDK_BAAnnot::GetRect() const {
   return m_pAnnot->GetRect();
 }
 
-CFX_ByteString CPDFSDK_BAAnnot::GetType() const {
-  return m_pAnnot->GetSubType();
-}
-
-CFX_ByteString CPDFSDK_BAAnnot::GetSubType() const {
-  return "";
+CFX_ByteString CPDFSDK_BAAnnot::GetAnnotSubtype() const {
+  return m_pAnnot->GetSubtype();
 }
 
 void CPDFSDK_BAAnnot::DrawAppearance(CFX_RenderDevice* pDevice,
diff --git a/fpdfsdk/cpdfsdk_bfannothandler.cpp b/fpdfsdk/cpdfsdk_bfannothandler.cpp
index 4742e5d275..ff0c26404c 100644
--- a/fpdfsdk/cpdfsdk_bfannothandler.cpp
+++ b/fpdfsdk/cpdfsdk_bfannothandler.cpp
@@ -32,8 +32,8 @@ CFX_ByteString CPDFSDK_BFAnnotHandler::GetType() {
 }
 
 FX_BOOL CPDFSDK_BFAnnotHandler::CanAnswer(CPDFSDK_Annot* pAnnot) {
-  ASSERT(pAnnot->GetType() == "Widget");
-  if (pAnnot->GetSubType() == BFFT_SIGNATURE)
+  ASSERT(pAnnot->GetAnnotSubtype() == "Widget");
+  if (pAnnot->IsSignatureWidget())
     return FALSE;
 
   CPDFSDK_Widget* pWidget = static_cast<CPDFSDK_Widget*>(pAnnot);
@@ -98,9 +98,7 @@ void CPDFSDK_BFAnnotHandler::OnDraw(CPDFSDK_PageView* pPageView,
                                     CFX_RenderDevice* pDevice,
                                     CFX_Matrix* pUser2Device,
                                     uint32_t dwFlags) {
-  CFX_ByteString sSubType = pAnnot->GetSubType();
-
-  if (sSubType == BFFT_SIGNATURE) {
+  if (pAnnot->IsSignatureWidget()) {
     static_cast<CPDFSDK_BAAnnot*>(pAnnot)->DrawAppearance(
         pDevice, pUser2Device, CPDF_Annot::Normal, nullptr);
   } else {
@@ -123,14 +121,14 @@ void CPDFSDK_BFAnnotHandler::OnRelease(CPDFSDK_Annot* pAnnot) {}
 void CPDFSDK_BFAnnotHandler::OnMouseEnter(CPDFSDK_PageView* pPageView,
                                           CPDFSDK_Annot* pAnnot,
                                           uint32_t nFlag) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     m_pFormFiller->OnMouseEnter(pPageView, pAnnot, nFlag);
 }
 
 void CPDFSDK_BFAnnotHandler::OnMouseExit(CPDFSDK_PageView* pPageView,
                                          CPDFSDK_Annot* pAnnot,
                                          uint32_t nFlag) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     m_pFormFiller->OnMouseExit(pPageView, pAnnot, nFlag);
 }
 
@@ -138,7 +136,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnLButtonDown(CPDFSDK_PageView* pPageView,
                                               CPDFSDK_Annot* pAnnot,
                                               uint32_t nFlags,
                                               const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnLButtonDown(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -148,7 +146,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnLButtonUp(CPDFSDK_PageView* pPageView,
                                             CPDFSDK_Annot* pAnnot,
                                             uint32_t nFlags,
                                             const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnLButtonUp(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -158,7 +156,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnLButtonDblClk(CPDFSDK_PageView* pPageView,
                                                 CPDFSDK_Annot* pAnnot,
                                                 uint32_t nFlags,
                                                 const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnLButtonDblClk(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -168,7 +166,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnMouseMove(CPDFSDK_PageView* pPageView,
                                             CPDFSDK_Annot* pAnnot,
                                             uint32_t nFlags,
                                             const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnMouseMove(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -179,7 +177,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnMouseWheel(CPDFSDK_PageView* pPageView,
                                              uint32_t nFlags,
                                              short zDelta,
                                              const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnMouseWheel(pPageView, pAnnot, nFlags, zDelta,
                                        point);
 
@@ -190,7 +188,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnRButtonDown(CPDFSDK_PageView* pPageView,
                                               CPDFSDK_Annot* pAnnot,
                                               uint32_t nFlags,
                                               const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnRButtonDown(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -200,7 +198,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnRButtonUp(CPDFSDK_PageView* pPageView,
                                             CPDFSDK_Annot* pAnnot,
                                             uint32_t nFlags,
                                             const CFX_FloatPoint& point) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnRButtonUp(pPageView, pAnnot, nFlags, point);
 
   return FALSE;
@@ -216,7 +214,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnRButtonDblClk(CPDFSDK_PageView* pPageView,
 FX_BOOL CPDFSDK_BFAnnotHandler::OnChar(CPDFSDK_Annot* pAnnot,
                                        uint32_t nChar,
                                        uint32_t nFlags) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnChar(pAnnot, nChar, nFlags);
 
   return FALSE;
@@ -225,7 +223,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnChar(CPDFSDK_Annot* pAnnot,
 FX_BOOL CPDFSDK_BFAnnotHandler::OnKeyDown(CPDFSDK_Annot* pAnnot,
                                           int nKeyCode,
                                           int nFlag) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnKeyDown(pAnnot, nKeyCode, nFlag);
 
   return FALSE;
@@ -238,12 +236,12 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnKeyUp(CPDFSDK_Annot* pAnnot,
 }
 
 void CPDFSDK_BFAnnotHandler::OnCreate(CPDFSDK_Annot* pAnnot) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     m_pFormFiller->OnCreate(pAnnot);
 }
 
 void CPDFSDK_BFAnnotHandler::OnLoad(CPDFSDK_Annot* pAnnot) {
-  if (pAnnot->GetSubType() == BFFT_SIGNATURE)
+  if (pAnnot->IsSignatureWidget())
     return;
 
   CPDFSDK_Widget* pWidget = static_cast<CPDFSDK_Widget*>(pAnnot);
@@ -273,7 +271,7 @@ void CPDFSDK_BFAnnotHandler::OnLoad(CPDFSDK_Annot* pAnnot) {
 
 FX_BOOL CPDFSDK_BFAnnotHandler::OnSetFocus(CPDFSDK_Annot* pAnnot,
                                            uint32_t nFlag) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnSetFocus(pAnnot, nFlag);
 
   return TRUE;
@@ -281,7 +279,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnSetFocus(CPDFSDK_Annot* pAnnot,
 
 FX_BOOL CPDFSDK_BFAnnotHandler::OnKillFocus(CPDFSDK_Annot* pAnnot,
                                             uint32_t nFlag) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return m_pFormFiller->OnKillFocus(pAnnot, nFlag);
 
   return TRUE;
@@ -296,7 +294,7 @@ FX_BOOL CPDFSDK_BFAnnotHandler::OnXFAChangedFocus(CPDFSDK_Annot* pOldAnnot,
 
 CFX_FloatRect CPDFSDK_BFAnnotHandler::GetViewBBox(CPDFSDK_PageView* pPageView,
                                                   CPDFSDK_Annot* pAnnot) {
-  if (pAnnot->GetSubType() != BFFT_SIGNATURE && m_pFormFiller)
+  if (!pAnnot->IsSignatureWidget() && m_pFormFiller)
     return CFX_FloatRect(m_pFormFiller->GetViewBBox(pPageView, pAnnot));
 
   return CFX_FloatRect(0, 0, 0, 0);
diff --git a/fpdfsdk/cpdfsdk_interform.cpp b/fpdfsdk/cpdfsdk_interform.cpp
index 65e778d2c4..1346deb2bc 100644
--- a/fpdfsdk/cpdfsdk_interform.cpp
+++ b/fpdfsdk/cpdfsdk_interform.cpp
@@ -72,7 +72,7 @@ FX_BOOL CPDFSDK_InterForm::HighlightWidgets() {
 CPDFSDK_Widget* CPDFSDK_InterForm::GetSibling(CPDFSDK_Widget* pWidget,
                                               FX_BOOL bNext) const {
   std::unique_ptr<CBA_AnnotIterator> pIterator(
-      new CBA_AnnotIterator(pWidget->GetPageView(), "Widget", ""));
+      new CBA_AnnotIterator(pWidget->GetPageView(), "Widget"));
 
   if (bNext)
     return static_cast<CPDFSDK_Widget*>(pIterator->GetNextAnnot(pWidget));
diff --git a/fpdfsdk/cpdfsdk_widget.cpp b/fpdfsdk/cpdfsdk_widget.cpp
index dcccf0ce1a..73ba23d076 100644
--- a/fpdfsdk/cpdfsdk_widget.cpp
+++ b/fpdfsdk/cpdfsdk_widget.cpp
@@ -546,12 +546,8 @@ int CPDFSDK_Widget::GetFieldFlags() const {
   return pFormField->GetFieldFlags();
 }
 
-CFX_ByteString CPDFSDK_Widget::GetSubType() const {
-  int nType = GetFieldType();
-
-  if (nType == FIELDTYPE_SIGNATURE)
-    return BFFT_SIGNATURE;
-  return CPDFSDK_Annot::GetSubType();
+bool CPDFSDK_Widget::IsSignatureWidget() const {
+  return GetFieldType() == FIELDTYPE_SIGNATURE;
 }
 
 CPDF_FormField* CPDFSDK_Widget::GetFormField() const {
diff --git a/fpdfsdk/cpdfsdk_xfawidget.cpp b/fpdfsdk/cpdfsdk_xfawidget.cpp
index b866156da8..445abc53cb 100644
--- a/fpdfsdk/cpdfsdk_xfawidget.cpp
+++ b/fpdfsdk/cpdfsdk_xfawidget.cpp
@@ -24,14 +24,10 @@ CXFA_FFWidget* CPDFSDK_XFAWidget::GetXFAWidget() const {
   return m_hXFAWidget;
 }
 
-CFX_ByteString CPDFSDK_XFAWidget::GetType() const {
+CFX_ByteString CPDFSDK_XFAWidget::GetAnnotSubtype() const {
   return FSDK_XFAWIDGET_TYPENAME;
 }
 
-CFX_ByteString CPDFSDK_XFAWidget::GetSubType() const {
-  return "";
-}
-
 CFX_FloatRect CPDFSDK_XFAWidget::GetRect() const {
   CFX_RectF rcBBox;
   GetXFAWidget()->GetRect(rcBBox);
diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index 0779f261a7..90b83d6e46 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -85,7 +85,7 @@ void CFFL_FormFiller::OnDraw(CPDFSDK_PageView* pPageView,
                              CFX_RenderDevice* pDevice,
                              CFX_Matrix* pUser2Device,
                              uint32_t dwFlags) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CPWL_Wnd* pWnd = GetPDFWindow(pPageView, FALSE)) {
     CFX_Matrix mt = GetCurMatrix();
diff --git a/fpdfsdk/formfiller/cffl_iformfiller.cpp b/fpdfsdk/formfiller/cffl_iformfiller.cpp
index 1f638444af..0f5ed89fb2 100644
--- a/fpdfsdk/formfiller/cffl_iformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_iformfiller.cpp
@@ -124,7 +124,7 @@ void CFFL_IFormFiller::OnDelete(CPDFSDK_Annot* pAnnot) {
 void CFFL_IFormFiller::OnMouseEnter(CPDFSDK_PageView* pPageView,
                                     CPDFSDK_Annot* pAnnot,
                                     FX_UINT nFlag) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (!m_bNotifying) {
     CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
@@ -160,7 +160,7 @@ void CFFL_IFormFiller::OnMouseEnter(CPDFSDK_PageView* pPageView,
 void CFFL_IFormFiller::OnMouseExit(CPDFSDK_PageView* pPageView,
                                    CPDFSDK_Annot* pAnnot,
                                    FX_UINT nFlag) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (!m_bNotifying) {
     CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
@@ -197,7 +197,7 @@ FX_BOOL CFFL_IFormFiller::OnLButtonDown(CPDFSDK_PageView* pPageView,
                                         CPDFSDK_Annot* pAnnot,
                                         FX_UINT nFlags,
                                         const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (!m_bNotifying) {
     CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
@@ -239,7 +239,7 @@ FX_BOOL CFFL_IFormFiller::OnLButtonUp(CPDFSDK_PageView* pPageView,
                                       CPDFSDK_Annot* pAnnot,
                                       FX_UINT nFlags,
                                       const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
   CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
   CPDFSDK_Document* pDocument = m_pApp->GetSDKDocument();
 
@@ -319,7 +319,7 @@ FX_BOOL CFFL_IFormFiller::OnLButtonDblClk(CPDFSDK_PageView* pPageView,
                                           CPDFSDK_Annot* pAnnot,
                                           FX_UINT nFlags,
                                           const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     return pFormFiller->OnLButtonDblClk(pPageView, pAnnot, nFlags, point);
@@ -332,7 +332,7 @@ FX_BOOL CFFL_IFormFiller::OnMouseMove(CPDFSDK_PageView* pPageView,
                                       CPDFSDK_Annot* pAnnot,
                                       FX_UINT nFlags,
                                       const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   // change cursor
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, TRUE)) {
@@ -347,7 +347,7 @@ FX_BOOL CFFL_IFormFiller::OnMouseWheel(CPDFSDK_PageView* pPageView,
                                        FX_UINT nFlags,
                                        short zDelta,
                                        const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     return pFormFiller->OnMouseWheel(pPageView, pAnnot, nFlags, zDelta, point);
@@ -360,7 +360,7 @@ FX_BOOL CFFL_IFormFiller::OnRButtonDown(CPDFSDK_PageView* pPageView,
                                         CPDFSDK_Annot* pAnnot,
                                         FX_UINT nFlags,
                                         const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     return pFormFiller->OnRButtonDown(pPageView, pAnnot, nFlags, point);
@@ -373,7 +373,7 @@ FX_BOOL CFFL_IFormFiller::OnRButtonUp(CPDFSDK_PageView* pPageView,
                                       CPDFSDK_Annot* pAnnot,
                                       FX_UINT nFlags,
                                       const CFX_FloatPoint& point) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     return pFormFiller->OnRButtonUp(pPageView, pAnnot, nFlags, point);
@@ -385,7 +385,7 @@ FX_BOOL CFFL_IFormFiller::OnRButtonUp(CPDFSDK_PageView* pPageView,
 FX_BOOL CFFL_IFormFiller::OnKeyDown(CPDFSDK_Annot* pAnnot,
                                     FX_UINT nKeyCode,
                                     FX_UINT nFlags) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     return pFormFiller->OnKeyDown(pAnnot, nKeyCode, nFlags);
@@ -397,7 +397,7 @@ FX_BOOL CFFL_IFormFiller::OnKeyDown(CPDFSDK_Annot* pAnnot,
 FX_BOOL CFFL_IFormFiller::OnChar(CPDFSDK_Annot* pAnnot,
                                  FX_UINT nChar,
                                  FX_UINT nFlags) {
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
   if (nChar == FWL_VKEY_Tab)
     return TRUE;
 
@@ -411,7 +411,7 @@ FX_BOOL CFFL_IFormFiller::OnSetFocus(CPDFSDK_Annot* pAnnot, FX_UINT nFlag) {
   if (!pAnnot)
     return FALSE;
 
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (!m_bNotifying) {
     CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
@@ -454,7 +454,7 @@ FX_BOOL CFFL_IFormFiller::OnSetFocus(CPDFSDK_Annot* pAnnot, FX_UINT nFlag) {
 FX_BOOL CFFL_IFormFiller::OnKillFocus(CPDFSDK_Annot* pAnnot, FX_UINT nFlag) {
   if (!pAnnot)
     return FALSE;
-  ASSERT(pAnnot->GetPDFAnnot()->GetSubType() == "Widget");
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == "Widget");
 
   if (CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, FALSE)) {
     pFormFiller->KillFocusForAnnot(pAnnot, nFlag);
diff --git a/fpdfsdk/fpdf_ext.cpp b/fpdfsdk/fpdf_ext.cpp
index 0f679eab3c..d03b4383ca 100644
--- a/fpdfsdk/fpdf_ext.cpp
+++ b/fpdfsdk/fpdf_ext.cpp
@@ -46,7 +46,7 @@ FSDK_SetUnSpObjProcessHandler(UNSUPPORT_INFO* unsp_info) {
 }
 
 void CheckUnSupportAnnot(CPDF_Document* pDoc, const CPDF_Annot* pPDFAnnot) {
-  CFX_ByteString cbSubType = pPDFAnnot->GetSubType();
+  CFX_ByteString cbSubType = pPDFAnnot->GetSubtype();
   if (cbSubType.Compare("3D") == 0) {
     FPDF_UnSupportError(FPDF_UNSP_ANNOT_3DANNOT);
   } else if (cbSubType.Compare("Screen") == 0) {
diff --git a/fpdfsdk/fsdk_baseform_embeddertest.cpp b/fpdfsdk/fsdk_baseform_embeddertest.cpp
index 7af8262c55..c87073d38b 100644
--- a/fpdfsdk/fsdk_baseform_embeddertest.cpp
+++ b/fpdfsdk/fsdk_baseform_embeddertest.cpp
@@ -42,7 +42,7 @@ TEST_F(FSDKBaseFormEmbeddertest, CBA_AnnotIterator) {
       CPDFSDK_Document::FromFPDFFormHandle(form_handle());
   {
     // Page 0 specifies "row order".
-    CBA_AnnotIterator iter(pSDKDoc->GetPageView(0), "Widget", "");
+    CBA_AnnotIterator iter(pSDKDoc->GetPageView(0), "Widget");
     CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
     CheckRect(pAnnot->GetRect(), RightTop);
     pAnnot = iter.GetNextAnnot(pAnnot);
@@ -67,7 +67,7 @@ TEST_F(FSDKBaseFormEmbeddertest, CBA_AnnotIterator) {
   }
   {
     // Page 1 specifies "column order"
-    CBA_AnnotIterator iter(pSDKDoc->GetPageView(1), "Widget", "");
+    CBA_AnnotIterator iter(pSDKDoc->GetPageView(1), "Widget");
     CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
     CheckRect(pAnnot->GetRect(), RightTop);
     pAnnot = iter.GetNextAnnot(pAnnot);
@@ -92,7 +92,7 @@ TEST_F(FSDKBaseFormEmbeddertest, CBA_AnnotIterator) {
   }
   {
     // Page 2 specifies "struct order"
-    CBA_AnnotIterator iter(pSDKDoc->GetPageView(2), "Widget", "");
+    CBA_AnnotIterator iter(pSDKDoc->GetPageView(2), "Widget");
     CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
     CheckRect(pAnnot->GetRect(), LeftBottom);
     pAnnot = iter.GetNextAnnot(pAnnot);
diff --git a/fpdfsdk/fsdk_mgr.cpp b/fpdfsdk/fsdk_mgr.cpp
index e0d78a2197..9f16098e12 100644
--- a/fpdfsdk/fsdk_mgr.cpp
+++ b/fpdfsdk/fsdk_mgr.cpp
@@ -442,7 +442,7 @@ FX_BOOL CPDFSDK_Document::KillFocusAnnot(FX_UINT nFlag) {
 #endif  // PDF_ENABLE_XFA
 
     if (pAnnotHandler->Annot_OnKillFocus(pFocusAnnot, nFlag)) {
-      if (pFocusAnnot->GetType() == "Widget") {
+      if (pFocusAnnot->GetAnnotSubtype() == "Widget") {
         CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pFocusAnnot;
         int nFieldType = pWidget->GetFieldType();
         if (FIELDTYPE_TEXTFIELD == nFieldType ||
@@ -586,7 +586,7 @@ const CPDF_Annot* CPDFSDK_PageView::GetPDFAnnotAtPoint(FX_FLOAT pageX,
 const CPDF_Annot* CPDFSDK_PageView::GetPDFWidgetAtPoint(FX_FLOAT pageX,
                                                         FX_FLOAT pageY) {
   for (const auto& pAnnot : m_pAnnotList->All()) {
-    if (pAnnot->GetSubType() == "Widget") {
+    if (pAnnot->GetSubtype() == "Widget") {
       CFX_FloatRect annotRect = pAnnot->GetRect();
       if (annotRect.Contains(pageX, pageY))
         return pAnnot.get();
@@ -615,9 +615,10 @@ CPDFSDK_Annot* CPDFSDK_PageView::GetFXWidgetAtPoint(FX_FLOAT pageX,
   CPDFSDK_AnnotHandlerMgr* pAnnotMgr = pEnv->GetAnnotHandlerMgr();
   CPDFSDK_AnnotIterator annotIterator(this, false);
   while (CPDFSDK_Annot* pSDKAnnot = annotIterator.Next()) {
-    bool bHitTest = pSDKAnnot->GetType() == "Widget";
+    bool bHitTest = pSDKAnnot->GetAnnotSubtype() == "Widget";
 #ifdef PDF_ENABLE_XFA
-    bHitTest = bHitTest || pSDKAnnot->GetType() == FSDK_XFAWIDGET_TYPENAME;
+    bHitTest =
+        bHitTest || pSDKAnnot->GetAnnotSubtype() == FSDK_XFAWIDGET_TYPENAME;
 #endif  // PDF_ENABLE_XFA
     if (bHitTest) {
       pAnnotMgr->Annot_OnGetViewBBox(this, pSDKAnnot);
diff --git a/fpdfsdk/include/cba_annotiterator.h b/fpdfsdk/include/cba_annotiterator.h
index 6161cbc814..0cf6e6a0ef 100644
--- a/fpdfsdk/include/cba_annotiterator.h
+++ b/fpdfsdk/include/cba_annotiterator.h
@@ -20,8 +20,7 @@ class CBA_AnnotIterator {
   enum TabOrder { STRUCTURE = 0, ROW, COLUMN };
 
   CBA_AnnotIterator(CPDFSDK_PageView* pPageView,
-                    const CFX_ByteString& sType,
-                    const CFX_ByteString& sSubType);
+                    const CFX_ByteString& sAnnotSubtype);
   ~CBA_AnnotIterator();
 
   CPDFSDK_Annot* GetFirstAnnot();
@@ -41,8 +40,7 @@ class CBA_AnnotIterator {
 
   TabOrder m_eTabOrder;
   CPDFSDK_PageView* m_pPageView;
-  CFX_ByteString m_sType;
-  CFX_ByteString m_sSubType;
+  CFX_ByteString m_sAnnotSubtype;
   std::vector<CPDFSDK_Annot*> m_Annots;
 };
 
diff --git a/fpdfsdk/include/cpdfsdk_annot.h b/fpdfsdk/include/cpdfsdk_annot.h
index 0fbee9ed7f..9501037cd6 100644
--- a/fpdfsdk/include/cpdfsdk_annot.h
+++ b/fpdfsdk/include/cpdfsdk_annot.h
@@ -35,8 +35,8 @@ class CPDFSDK_Annot {
   virtual FX_FLOAT GetMinHeight() const;
   virtual int GetLayoutOrder() const;
   virtual CPDF_Annot* GetPDFAnnot() const;
-  virtual CFX_ByteString GetType() const;
-  virtual CFX_ByteString GetSubType() const;
+  virtual CFX_ByteString GetAnnotSubtype() const;
+  virtual bool IsSignatureWidget() const;
   virtual CFX_FloatRect GetRect() const;
 
   virtual void SetRect(const CFX_FloatRect& rect);
diff --git a/fpdfsdk/include/cpdfsdk_baannot.h b/fpdfsdk/include/cpdfsdk_baannot.h
index abe23fe1b9..e83cb0fe45 100644
--- a/fpdfsdk/include/cpdfsdk_baannot.h
+++ b/fpdfsdk/include/cpdfsdk_baannot.h
@@ -28,8 +28,7 @@ class CPDFSDK_BAAnnot : public CPDFSDK_Annot {
   ~CPDFSDK_BAAnnot() override;
 
   // CPDFSDK_Annot
-  CFX_ByteString GetType() const override;
-  CFX_ByteString GetSubType() const override;
+  CFX_ByteString GetAnnotSubtype() const override;
   void SetRect(const CFX_FloatRect& rect) override;
   CFX_FloatRect GetRect() const override;
   CPDF_Annot* GetPDFAnnot() const override;
diff --git a/fpdfsdk/include/cpdfsdk_widget.h b/fpdfsdk/include/cpdfsdk_widget.h
index 7f5e34586d..51116f9581 100644
--- a/fpdfsdk/include/cpdfsdk_widget.h
+++ b/fpdfsdk/include/cpdfsdk_widget.h
@@ -78,7 +78,7 @@ class CPDFSDK_Widget : public CPDFSDK_BAAnnot {
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
-  CFX_ByteString GetSubType() const override;
+  bool IsSignatureWidget() const override;
   CPDF_Action GetAAction(CPDF_AAction::AActionType eAAT) override;
   FX_BOOL IsAppearanceValid() override;
 
diff --git a/fpdfsdk/include/cpdfsdk_xfawidget.h b/fpdfsdk/include/cpdfsdk_xfawidget.h
index 46e71b6481..00cc01249c 100644
--- a/fpdfsdk/include/cpdfsdk_xfawidget.h
+++ b/fpdfsdk/include/cpdfsdk_xfawidget.h
@@ -24,8 +24,7 @@ class CPDFSDK_XFAWidget : public CPDFSDK_Annot {
 
   FX_BOOL IsXFAField() override;
   CXFA_FFWidget* GetXFAWidget() const override;
-  CFX_ByteString GetType() const override;
-  CFX_ByteString GetSubType() const override;
+  CFX_ByteString GetAnnotSubtype() const override;
   CFX_FloatRect GetRect() const override;
 
   CPDFSDK_InterForm* GetInterForm() { return m_pInterForm; }
diff --git a/fpdfsdk/include/fsdk_common.h b/fpdfsdk/include/fsdk_common.h
index 5c5d24f2c8..a33958a08d 100644
--- a/fpdfsdk/include/fsdk_common.h
+++ b/fpdfsdk/include/fsdk_common.h
@@ -7,8 +7,6 @@
 #ifndef FPDFSDK_INCLUDE_FSDK_COMMON_H_
 #define FPDFSDK_INCLUDE_FSDK_COMMON_H_
 
-#define BFFT_SIGNATURE "Signature"
-
 // for all fields
 #define FIELDFLAG_READONLY 1
 #define FIELDFLAG_REQUIRED 2
diff --git a/fpdfsdk/javascript/Annot.cpp b/fpdfsdk/javascript/Annot.cpp
index df123274d5..9945217198 100644
--- a/fpdfsdk/javascript/Annot.cpp
+++ b/fpdfsdk/javascript/Annot.cpp
@@ -80,7 +80,7 @@ FX_BOOL Annot::type(IJS_Context* cc,
     return FALSE;
   }
 
-  vp << m_BAAnnot->GetType();
+  vp << m_BAAnnot->GetAnnotSubtype();
   return TRUE;
 }