Implement FORM_GetFocusedText() API.

If there is a focused form field, get its text.

BUG=chromium:753216

Change-Id: I05294f14d05c1c86769055f6c9eaf9177787d9fd
Reviewed-on: https://pdfium-review.googlesource.com/12072
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

8 files changed, 39 insertions, 12 deletions

diff --git a/xfa/fxfa/cxfa_ffcombobox.cpp b/xfa/fxfa/cxfa_ffcombobox.cpp
index 268d1da2b4..e4de85c517 100644
--- a/xfa/fxfa/cxfa_ffcombobox.cpp
+++ b/xfa/fxfa/cxfa_ffcombobox.cpp
@@ -116,14 +116,7 @@ bool CXFA_FFComboBox::CommitData() {
 }
 
 bool CXFA_FFComboBox::IsDataChanged() {
-  auto* pFWLcombobox = ToComboBox(m_pNormalWidget.get());
-  WideString wsText = pFWLcombobox->GetEditText();
-  int32_t iCursel = pFWLcombobox->GetCurSel();
-  if (iCursel >= 0) {
-    WideString wsSel = pFWLcombobox->GetTextByIndex(iCursel);
-    if (wsSel == wsText)
-      wsText = m_pNode->GetChoiceListItem(iCursel, true).value_or(L"");
-  }
+  WideString wsText = GetCurrentText();
   if (m_pNode->GetValue(XFA_VALUEPICTURE_Raw) == wsText)
     return false;
 
@@ -138,6 +131,18 @@ void CXFA_FFComboBox::FWLEventSelChange(CXFA_EventParam* pParam) {
   m_pNode->ProcessEvent(GetDocView(), XFA_AttributeEnum::Change, pParam);
 }
 
+WideString CXFA_FFComboBox::GetCurrentText() const {
+  auto* pFWLcombobox = ToComboBox(m_pNormalWidget.get());
+  WideString wsText = pFWLcombobox->GetEditText();
+  int32_t iCursel = pFWLcombobox->GetCurSel();
+  if (iCursel >= 0) {
+    WideString wsSel = pFWLcombobox->GetTextByIndex(iCursel);
+    if (wsSel == wsText)
+      wsText = m_pNode->GetChoiceListItem(iCursel, true).value_or(L"");
+  }
+  return wsText;
+}
+
 uint32_t CXFA_FFComboBox::GetAlignment() {
   CXFA_Para* para = m_pNode->GetParaIfExists();
   if (!para)
@@ -259,6 +264,10 @@ void CXFA_FFComboBox::DeSelect() {
   ToComboBox(m_pNormalWidget.get())->EditDeSelect();
 }
 
+WideString CXFA_FFComboBox::GetText() {
+  return GetCurrentText();
+}
+
 FormFieldType CXFA_FFComboBox::GetFormFieldType() {
   return FormFieldType::kXFA_ComboBox;
 }
diff --git a/xfa/fxfa/cxfa_ffcombobox.h b/xfa/fxfa/cxfa_ffcombobox.h
index 5daab781a6..66f92b2557 100644
--- a/xfa/fxfa/cxfa_ffcombobox.h
+++ b/xfa/fxfa/cxfa_ffcombobox.h
@@ -37,6 +37,7 @@ class CXFA_FFComboBox : public CXFA_FFDropDown {
   void SelectAll() override;
   void Delete() override;
   void DeSelect() override;
+  WideString GetText() override;
   FormFieldType GetFormFieldType() override;
 
   // IFWL_WidgetDelegate
@@ -67,6 +68,8 @@ class CXFA_FFComboBox : public CXFA_FFDropDown {
   uint32_t GetAlignment();
   void FWLEventSelChange(CXFA_EventParam* pParam);
 
+  WideString GetCurrentText() const;
+
   WideString m_wsNewValue;
   IFWL_WidgetDelegate* m_pOldDelegate;
 };
diff --git a/xfa/fxfa/cxfa_fftextedit.cpp b/xfa/fxfa/cxfa_fftextedit.cpp
index fd2cfb76cc..d8de8a028f 100644
--- a/xfa/fxfa/cxfa_fftextedit.cpp
+++ b/xfa/fxfa/cxfa_fftextedit.cpp
@@ -63,7 +63,7 @@ bool CXFA_FFTextEdit::LoadWidget() {
 }
 
 void CXFA_FFTextEdit::UpdateWidgetProperty() {
-  CFWL_Edit* pWidget = static_cast<CFWL_Edit*>(m_pNormalWidget.get());
+  CFWL_Edit* pWidget = ToEdit(m_pNormalWidget.get());
   if (!pWidget)
     return;
 
@@ -185,7 +185,7 @@ bool CXFA_FFTextEdit::OnKillFocus(CXFA_FFWidget* pNewWidget) {
 }
 
 bool CXFA_FFTextEdit::CommitData() {
-  WideString wsText = static_cast<CFWL_Edit*>(m_pNormalWidget.get())->GetText();
+  WideString wsText = ToEdit(m_pNormalWidget.get())->GetText();
   if (m_pNode->SetValue(XFA_VALUEPICTURE_Edit, wsText)) {
     m_pNode->UpdateUIDisplay(GetDoc()->GetDocView(), this);
     return true;
@@ -255,7 +255,7 @@ bool CXFA_FFTextEdit::UpdateFWLData() {
   if (!m_pNormalWidget)
     return false;
 
-  CFWL_Edit* pEdit = static_cast<CFWL_Edit*>(m_pNormalWidget.get());
+  CFWL_Edit* pEdit = ToEdit(m_pNormalWidget.get());
   XFA_VALUEPICTURE eType = XFA_VALUEPICTURE_Display;
   if (IsFocused())
     eType = XFA_VALUEPICTURE_Edit;
@@ -305,7 +305,7 @@ void CXFA_FFTextEdit::OnTextChanged(CFWL_Widget* pWidget,
   eParam.m_wsChange = wsChanged;
   eParam.m_pTarget = m_pNode.Get();
   eParam.m_wsPrevText = wsPrevText;
-  CFWL_Edit* pEdit = static_cast<CFWL_Edit*>(m_pNormalWidget.get());
+  CFWL_Edit* pEdit = ToEdit(m_pNormalWidget.get());
   if (m_pNode->GetFFWidgetType() == XFA_FFWidgetType::kDateTimeEdit) {
     CFWL_DateTimePicker* pDateTime = (CFWL_DateTimePicker*)pEdit;
     eParam.m_wsNewText = pDateTime->GetEditText();
@@ -417,6 +417,10 @@ void CXFA_FFTextEdit::DeSelect() {
   ToEdit(m_pNormalWidget.get())->ClearSelection();
 }
 
+WideString CXFA_FFTextEdit::GetText() {
+  return ToEdit(m_pNormalWidget.get())->GetText();
+}
+
 FormFieldType CXFA_FFTextEdit::GetFormFieldType() {
   return FormFieldType::kXFA_TextField;
 }
diff --git a/xfa/fxfa/cxfa_fftextedit.h b/xfa/fxfa/cxfa_fftextedit.h
index 36251e152a..7c19444ae6 100644
--- a/xfa/fxfa/cxfa_fftextedit.h
+++ b/xfa/fxfa/cxfa_fftextedit.h
@@ -58,6 +58,7 @@ class CXFA_FFTextEdit : public CXFA_FFField {
   void SelectAll() override;
   void Delete() override;
   void DeSelect() override;
+  WideString GetText() override;
   FormFieldType GetFormFieldType() override;
 
  protected:
diff --git a/xfa/fxfa/cxfa_ffwidget.cpp b/xfa/fxfa/cxfa_ffwidget.cpp
index f9a4807099..553612ea87 100644
--- a/xfa/fxfa/cxfa_ffwidget.cpp
+++ b/xfa/fxfa/cxfa_ffwidget.cpp
@@ -499,6 +499,10 @@ void CXFA_FFWidget::Delete() {}
 
 void CXFA_FFWidget::DeSelect() {}
 
+WideString CXFA_FFWidget::GetText() {
+  return WideString();
+}
+
 FormFieldType CXFA_FFWidget::GetFormFieldType() {
   return FormFieldType::kXFA;
 }
diff --git a/xfa/fxfa/cxfa_ffwidget.h b/xfa/fxfa/cxfa_ffwidget.h
index a16b27a88f..0381a0c913 100644
--- a/xfa/fxfa/cxfa_ffwidget.h
+++ b/xfa/fxfa/cxfa_ffwidget.h
@@ -140,6 +140,7 @@ class CXFA_FFWidget : public CXFA_ContentLayoutItem {
   virtual void SelectAll();
   virtual void Delete();
   virtual void DeSelect();
+  virtual WideString GetText();
 
   virtual FormFieldType GetFormFieldType();
 
diff --git a/xfa/fxfa/cxfa_ffwidgethandler.cpp b/xfa/fxfa/cxfa_ffwidgethandler.cpp
index f2bce57ea4..c3efd60b1d 100644
--- a/xfa/fxfa/cxfa_ffwidgethandler.cpp
+++ b/xfa/fxfa/cxfa_ffwidgethandler.cpp
@@ -147,6 +147,10 @@ bool CXFA_FFWidgetHandler::OnChar(CXFA_FFWidget* hWidget,
   return bRet;
 }
 
+WideString CXFA_FFWidgetHandler::GetText(CXFA_FFWidget* widget) {
+  return widget->GetText();
+}
+
 WideString CXFA_FFWidgetHandler::GetSelectedText(CXFA_FFWidget* widget) {
   if (!widget->CanCopy())
     return WideString();
diff --git a/xfa/fxfa/cxfa_ffwidgethandler.h b/xfa/fxfa/cxfa_ffwidgethandler.h
index 378a442409..ba6a5a26ca 100644
--- a/xfa/fxfa/cxfa_ffwidgethandler.h
+++ b/xfa/fxfa/cxfa_ffwidgethandler.h
@@ -54,6 +54,7 @@ class CXFA_FFWidgetHandler {
                        uint32_t dwFlags,
                        const CFX_PointF& point);
 
+  WideString GetText(CXFA_FFWidget* widget);
   WideString GetSelectedText(CXFA_FFWidget* widget);
   void PasteText(CXFA_FFWidget* widget, const WideString& text);