Add FORM_GetSelectedText() function.

This function copies the selected text from a form text field or
form combobox text field into the buffer parameter and returns the
length of the selected text string. When buffer is a nullptr or
buflen is less than the length of the selected text, this function
does not modify the buffer and only returns the selected text length.

BUG=chromium:59266

Change-Id: Ie77de38e45bbe6f9ea033826c961435304eedfc7
Reviewed-on: https://pdfium-review.googlesource.com/6413
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
index 9c22cead58..3390696e01 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_edit_ctrl.cpp
@@ -53,6 +53,13 @@ void CPWL_EditCtrl::SetCursor() {
   }
 }
 
+CFX_WideString CPWL_EditCtrl::GetSelectedText() {
+  if (m_pEdit)
+    return m_pEdit->GetSelText();
+
+  return CFX_WideString();
+}
+
 void CPWL_EditCtrl::RePosChildWnd() {
   m_pEdit->SetPlateRect(GetClientRect());
 }