Add embeddertest for CFWL_Edit

This CL adds two mouse selection tests for CFWL_Edit. In order to do so
the needed selection code was added to the XFA widget handler and
plumbed down to the CFWL_Edit field as needed.

Bug: pdfium:840
Change-Id: Ia3b5f5d191494a4579c01524df8fb35b24cc0085
Reviewed-on: https://pdfium-review.googlesource.com/14530
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

4 files changed, 103 insertions, 0 deletions

diff --git a/xfa/fxfa/cxfa_fftextedit.cpp b/xfa/fxfa/cxfa_fftextedit.cpp
index 82b6f63b59..8f68368757 100644
--- a/xfa/fxfa/cxfa_fftextedit.cpp
+++ b/xfa/fxfa/cxfa_fftextedit.cpp
@@ -20,6 +20,14 @@
 #include "xfa/fxfa/cxfa_ffapp.h"
 #include "xfa/fxfa/parser/cxfa_node.h"
 
+namespace {
+
+CFWL_Edit* ToEdit(CFWL_Widget* widget) {
+  return static_cast<CFWL_Edit*>(widget);
+}
+
+}  // namespace
+
 CXFA_FFTextEdit::CXFA_FFTextEdit(CXFA_WidgetAcc* pDataAcc)
     : CXFA_FFField(pDataAcc), m_pOldDelegate(nullptr) {}
 
@@ -356,3 +364,62 @@ void CXFA_FFTextEdit::OnDrawWidget(CXFA_Graphics* pGraphics,
                                    const CFX_Matrix& matrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, matrix);
 }
+
+bool CXFA_FFTextEdit::CanUndo() {
+  return ToEdit(m_pNormalWidget.get())->CanUndo();
+}
+
+bool CXFA_FFTextEdit::CanRedo() {
+  return ToEdit(m_pNormalWidget.get())->CanRedo();
+}
+
+bool CXFA_FFTextEdit::Undo() {
+  return ToEdit(m_pNormalWidget.get())->Undo();
+}
+
+bool CXFA_FFTextEdit::Redo() {
+  return ToEdit(m_pNormalWidget.get())->Redo();
+}
+
+bool CXFA_FFTextEdit::CanCopy() {
+  return ToEdit(m_pNormalWidget.get())->HasSelection();
+}
+
+bool CXFA_FFTextEdit::CanCut() {
+  if (ToEdit(m_pNormalWidget.get())->GetStylesEx() & FWL_STYLEEXT_EDT_ReadOnly)
+    return false;
+  return ToEdit(m_pNormalWidget.get())->HasSelection();
+}
+
+bool CXFA_FFTextEdit::CanPaste() {
+  return !(ToEdit(m_pNormalWidget.get())->GetStylesEx() &
+           FWL_STYLEEXT_EDT_ReadOnly);
+}
+
+bool CXFA_FFTextEdit::CanSelectAll() {
+  return ToEdit(m_pNormalWidget.get())->GetTextLength() > 0;
+}
+
+bool CXFA_FFTextEdit::Copy(WideString& wsCopy) {
+  return ToEdit(m_pNormalWidget.get())->Copy(wsCopy);
+}
+
+bool CXFA_FFTextEdit::Cut(WideString& wsCut) {
+  return ToEdit(m_pNormalWidget.get())->Copy(wsCut);
+}
+
+bool CXFA_FFTextEdit::Paste(const WideString& wsPaste) {
+  return ToEdit(m_pNormalWidget.get())->Paste(wsPaste);
+}
+
+void CXFA_FFTextEdit::SelectAll() {
+  ToEdit(m_pNormalWidget.get())->SelectAll();
+}
+
+void CXFA_FFTextEdit::Delete() {
+  ToEdit(m_pNormalWidget.get())->ClearText();
+}
+
+void CXFA_FFTextEdit::DeSelect() {
+  ToEdit(m_pNormalWidget.get())->ClearSelection();
+}
diff --git a/xfa/fxfa/cxfa_fftextedit.h b/xfa/fxfa/cxfa_fftextedit.h
index 9735b9e7d8..dd3801b4df 100644
--- a/xfa/fxfa/cxfa_fftextedit.h
+++ b/xfa/fxfa/cxfa_fftextedit.h
@@ -42,6 +42,22 @@ class CXFA_FFTextEdit : public CXFA_FFField {
   void OnTextFull(CFWL_Widget* pWidget);
   bool CheckWord(const ByteStringView& sWord);
 
+  // CXFA_FFWidget
+  bool CanUndo() override;
+  bool CanRedo() override;
+  bool Undo() override;
+  bool Redo() override;
+  bool CanCopy() override;
+  bool CanCut() override;
+  bool CanPaste() override;
+  bool CanSelectAll() override;
+  bool Copy(WideString& wsCopy) override;
+  bool Cut(WideString& wsCut) override;
+  bool Paste(const WideString& wsPaste) override;
+  void SelectAll() override;
+  void Delete() override;
+  void DeSelect() override;
+
  protected:
   uint32_t GetAlignment();
 
diff --git a/xfa/fxfa/cxfa_ffwidgethandler.cpp b/xfa/fxfa/cxfa_ffwidgethandler.cpp
index 524bbed9e2..8f916d804b 100644
--- a/xfa/fxfa/cxfa_ffwidgethandler.cpp
+++ b/xfa/fxfa/cxfa_ffwidgethandler.cpp
@@ -142,6 +142,23 @@ bool CXFA_FFWidgetHandler::OnChar(CXFA_FFWidget* hWidget,
   return bRet;
 }
 
+WideString CXFA_FFWidgetHandler::GetSelectedText(CXFA_FFWidget* widget) {
+  if (!widget->CanCopy())
+    return WideString();
+
+  WideString val;
+  widget->Copy(val);
+  return val;
+}
+
+void CXFA_FFWidgetHandler::PasteText(CXFA_FFWidget* widget,
+                                     const WideString& text) {
+  if (!widget->CanPaste())
+    return;
+
+  widget->Paste(text);
+}
+
 FWL_WidgetHit CXFA_FFWidgetHandler::OnHitTest(CXFA_FFWidget* hWidget,
                                               const CFX_PointF& point) {
   if (!(hWidget->GetStatus() & XFA_WidgetStatus_Visible))
diff --git a/xfa/fxfa/cxfa_ffwidgethandler.h b/xfa/fxfa/cxfa_ffwidgethandler.h
index 474412069e..e2b50dc27c 100644
--- a/xfa/fxfa/cxfa_ffwidgethandler.h
+++ b/xfa/fxfa/cxfa_ffwidgethandler.h
@@ -53,6 +53,9 @@ class CXFA_FFWidgetHandler {
                        uint32_t dwFlags,
                        const CFX_PointF& point);
 
+  WideString GetSelectedText(CXFA_FFWidget* widget);
+  void PasteText(CXFA_FFWidget* widget, const WideString& text);
+
   bool OnKeyDown(CXFA_FFWidget* hWidget, uint32_t dwKeyCode, uint32_t dwFlags);
   bool OnKeyUp(CXFA_FFWidget* hWidget, uint32_t dwKeyCode, uint32_t dwFlags);
   bool OnChar(CXFA_FFWidget* hWidget, uint32_t dwChar, uint32_t dwFlags);