Simplify code in CPWL_EditCtrl::SetCursor().

- GetSystemHandler() always returns non-null.
- Use a ternary operator.
- Also mark CPWL_EditCtrl::IsWndHorV() const.

Change-Id: I23d54fff280d527864b21298ee5e6f298b94e480
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/58811
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

fpdfsdk/pwl/cpwl_edit_ctrl.cpp

diff --git a/fpdfsdk/pwl/cpwl_edit_ctrl.cpp b/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
index 9b874c1..28d9168 100644
--- a/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
+++ b/fpdfsdk/pwl/cpwl_edit_ctrl.cpp
@@ -34,20 +34,14 @@
   m_pEdit->Initialize();
 }
 
-bool CPWL_EditCtrl::IsWndHorV() {
+bool CPWL_EditCtrl::IsWndHorV() const {
   CFX_Matrix mt = GetWindowMatrix();
   return mt.Transform(CFX_PointF(1, 1)).y == mt.Transform(CFX_PointF(0, 1)).y;
 }
 
 void CPWL_EditCtrl::SetCursor() {
-  if (IsValid()) {
-    if (IPWL_SystemHandler* pSH = GetSystemHandler()) {
-      if (IsWndHorV())
-        pSH->SetCursor(FXCT_VBEAM);
-      else
-        pSH->SetCursor(FXCT_HBEAM);
-    }
-  }
+  if (IsValid())
+    GetSystemHandler()->SetCursor(IsWndHorV() ? FXCT_VBEAM : FXCT_HBEAM);
 }
 
 WideString CPWL_EditCtrl::GetSelectedText() {

fpdfsdk/pwl/cpwl_edit_ctrl.h

diff --git a/fpdfsdk/pwl/cpwl_edit_ctrl.h b/fpdfsdk/pwl/cpwl_edit_ctrl.h
index aeeb7f6..df504d8 100644
--- a/fpdfsdk/pwl/cpwl_edit_ctrl.h
+++ b/fpdfsdk/pwl/cpwl_edit_ctrl.h
@@ -74,7 +74,7 @@
   void CutText();
   void InsertWord(uint16_t word, int32_t nCharset);
   void InsertReturn();
-  bool IsWndHorV();
+  bool IsWndHorV() const;
   void Delete();
   void Backspace();
   void GetCaretInfo(CFX_PointF* ptHead, CFX_PointF* ptFoot) const;