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>

1 files changed, 15 insertions, 8 deletions

diff --git a/fpdfsdk/fpdf_formfill.cpp b/fpdfsdk/fpdf_formfill.cpp
index 912db878f8..7676463edc 100644
--- a/fpdfsdk/fpdf_formfill.cpp
+++ b/fpdfsdk/fpdf_formfill.cpp
@@ -427,6 +427,19 @@ FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnChar(FPDF_FORMHANDLE hHandle,
 }
 
 FPDF_EXPORT unsigned long FPDF_CALLCONV
+FORM_GetFocusedText(FPDF_FORMHANDLE hHandle,
+                    FPDF_PAGE page,
+                    void* buffer,
+                    unsigned long buflen) {
+  CPDFSDK_PageView* pPageView = FormHandleToPageView(hHandle, page);
+  if (!pPageView)
+    return 0;
+
+  return Utf16EncodeMaybeCopyAndReturnLength(pPageView->GetFocusedFormText(),
+                                             buffer, buflen);
+}
+
+FPDF_EXPORT unsigned long FPDF_CALLCONV
 FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
                      FPDF_PAGE page,
                      void* buffer,
@@ -435,14 +448,8 @@ FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
   if (!pPageView)
     return 0;
 
-  WideString wide_str_form_text = pPageView->GetSelectedText();
-  ByteString encoded_form_text = wide_str_form_text.UTF16LE_Encode();
-  unsigned long form_text_len = encoded_form_text.GetLength();
-
-  if (buffer && buflen >= form_text_len)
-    memcpy(buffer, encoded_form_text.c_str(), form_text_len);
-
-  return form_text_len;
+  return Utf16EncodeMaybeCopyAndReturnLength(pPageView->GetSelectedText(),
+                                             buffer, buflen);
 }
 
 FPDF_EXPORT void FPDF_CALLCONV FORM_ReplaceSelection(FPDF_FORMHANDLE hHandle,