Add FORM_DeleteSelectedText() and embedder tests.

This method deletes the current text selection in a form text field or
user-editable form combobox text field. If there is no selection, this
method does nothing.

BUG=chromium:59266

Change-Id: I3229ffad990c62beac1cf769cd366458b9ee5daa
Reviewed-on: https://pdfium-review.googlesource.com/8370
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Diana Gage <drgage@google.com>

4 files changed, 25 insertions, 0 deletions

diff --git a/fpdfsdk/formfiller/cffl_formfiller.cpp b/fpdfsdk/formfiller/cffl_formfiller.cpp
index edbd671f29..a37a7501d0 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_formfiller.cpp
@@ -245,6 +245,20 @@ CFX_WideString CFFL_FormFiller::GetSelectedText(CPDFSDK_Annot* pAnnot) {
   return pWnd ? pWnd->GetSelectedText() : CFX_WideString();
 }
 
+void CFFL_FormFiller::DeleteSelectedText(CPDFSDK_Annot* pAnnot) {
+  if (!IsValid())
+    return;
+
+  CPDFSDK_PageView* pPageView = GetCurPageView(true);
+  ASSERT(pPageView);
+
+  CPWL_Wnd* pWnd = GetPDFWindow(pPageView, false);
+  if (!pWnd)
+    return;
+
+  pWnd->DeleteSelectedText();
+}
+
 void CFFL_FormFiller::SetFocusForAnnot(CPDFSDK_Annot* pAnnot, uint32_t nFlag) {
   CPDFSDK_Widget* pWidget = (CPDFSDK_Widget*)pAnnot;
   UnderlyingPageType* pPage = pWidget->GetUnderlyingPage();
diff --git a/fpdfsdk/formfiller/cffl_formfiller.h b/fpdfsdk/formfiller/cffl_formfiller.h
index 3eedebea47..96b7a69b29 100644
--- a/fpdfsdk/formfiller/cffl_formfiller.h
+++ b/fpdfsdk/formfiller/cffl_formfiller.h
@@ -75,6 +75,7 @@ class CFFL_FormFiller : public IPWL_Provider, public CPWL_TimerHandler {
   virtual bool OnChar(CPDFSDK_Annot* pAnnot, uint32_t nChar, uint32_t nFlags);
 
   CFX_WideString GetSelectedText(CPDFSDK_Annot* pAnnot);
+  void DeleteSelectedText(CPDFSDK_Annot* pAnnot);
 
   void SetFocusForAnnot(CPDFSDK_Annot* pAnnot, uint32_t nFlag);
   void KillFocusForAnnot(CPDFSDK_Annot* pAnnot, uint32_t nFlag);
diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
index 8a81f4c40d..24bfd3c3b2 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.cpp
@@ -523,6 +523,15 @@ CFX_WideString CFFL_InteractiveFormFiller::GetSelectedText(
   return pFormFiller ? pFormFiller->GetSelectedText(pAnnot) : CFX_WideString();
 }
 
+void CFFL_InteractiveFormFiller::DeleteSelectedText(CPDFSDK_Annot* pAnnot) {
+  ASSERT(pAnnot->GetPDFAnnot()->GetSubtype() == CPDF_Annot::Subtype::WIDGET);
+  CFFL_FormFiller* pFormFiller = GetFormFiller(pAnnot, false);
+  if (!pFormFiller)
+    return;
+
+  pFormFiller->DeleteSelectedText(pAnnot);
+}
+
 void CFFL_InteractiveFormFiller::UnRegisterFormFiller(CPDFSDK_Annot* pAnnot) {
   auto it = m_Maps.find(pAnnot);
   if (it == m_Maps.end())
diff --git a/fpdfsdk/formfiller/cffl_interactiveformfiller.h b/fpdfsdk/formfiller/cffl_interactiveformfiller.h
index fb141e17a4..744d522fbc 100644
--- a/fpdfsdk/formfiller/cffl_interactiveformfiller.h
+++ b/fpdfsdk/formfiller/cffl_interactiveformfiller.h
@@ -84,6 +84,7 @@ class CFFL_InteractiveFormFiller : public IPWL_Filler_Notify {
   void RemoveFormFiller(CPDFSDK_Annot* pAnnot);
 
   CFX_WideString GetSelectedText(CPDFSDK_Annot* pAnnot);
+  void DeleteSelectedText(CPDFSDK_Annot* pAnnot);
 
   static bool IsVisible(CPDFSDK_Widget* pWidget);
   static bool IsReadOnly(CPDFSDK_Widget* pWidget);