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>

1 files changed, 62 insertions, 0 deletions

diff --git a/fpdfsdk/pdfwindow/cpwl_edit_embeddertest.cpp b/fpdfsdk/pdfwindow/cpwl_edit_embeddertest.cpp
index 9b15ad887d..2b1bbd4445 100644
--- a/fpdfsdk/pdfwindow/cpwl_edit_embeddertest.cpp
+++ b/fpdfsdk/pdfwindow/cpwl_edit_embeddertest.cpp
@@ -123,3 +123,65 @@ TEST_F(CPWLEditEmbeddertest, GetSelectedTextFragments) {
   GetCPWLEdit()->SetSelection(49, 50);
   EXPECT_STREQ(L"r", GetCPWLEdit()->GetSelectedText().c_str());
 }
+
+TEST_F(CPWLEditEmbeddertest, DeleteEntireTextSelection) {
+  for (int i = 0; i < 50; ++i) {
+    EXPECT_TRUE(GetCFFLFormFiller()->OnChar(GetCPDFSDKAnnot(), i + 'A', 0));
+  }
+
+  GetCPWLEdit()->SetSelection(0, -1);
+  EXPECT_STREQ(L"ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqr",
+               GetCPWLEdit()->GetSelectedText().c_str());
+
+  GetCPWLEdit()->DeleteSelectedText();
+  EXPECT_TRUE(GetCPWLEdit()->GetText().IsEmpty());
+}
+
+TEST_F(CPWLEditEmbeddertest, DeleteTextSelectionMiddle) {
+  for (int i = 0; i < 50; ++i) {
+    EXPECT_TRUE(GetCFFLFormFiller()->OnChar(GetCPDFSDKAnnot(), i + 'A', 0));
+  }
+
+  GetCPWLEdit()->SetSelection(12, 23);
+  EXPECT_STREQ(L"MNOPQRSTUVW", GetCPWLEdit()->GetSelectedText().c_str());
+
+  GetCPWLEdit()->DeleteSelectedText();
+  EXPECT_STREQ(L"ABCDEFGHIJKLXYZ[\\]^_`abcdefghijklmnopqr",
+               GetCPWLEdit()->GetText().c_str());
+}
+
+TEST_F(CPWLEditEmbeddertest, DeleteTextSelectionLeft) {
+  for (int i = 0; i < 50; ++i) {
+    EXPECT_TRUE(GetCFFLFormFiller()->OnChar(GetCPDFSDKAnnot(), i + 'A', 0));
+  }
+
+  GetCPWLEdit()->SetSelection(0, 5);
+  EXPECT_STREQ(L"ABCDE", GetCPWLEdit()->GetSelectedText().c_str());
+
+  GetCPWLEdit()->DeleteSelectedText();
+  EXPECT_STREQ(L"FGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqr",
+               GetCPWLEdit()->GetText().c_str());
+}
+
+TEST_F(CPWLEditEmbeddertest, DeleteTextSelectionRight) {
+  for (int i = 0; i < 50; ++i) {
+    EXPECT_TRUE(GetCFFLFormFiller()->OnChar(GetCPDFSDKAnnot(), i + 'A', 0));
+  }
+
+  GetCPWLEdit()->SetSelection(45, 50);
+  EXPECT_STREQ(L"nopqr", GetCPWLEdit()->GetSelectedText().c_str());
+
+  GetCPWLEdit()->DeleteSelectedText();
+  EXPECT_STREQ(L"ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklm",
+               GetCPWLEdit()->GetText().c_str());
+}
+
+TEST_F(CPWLEditEmbeddertest, DeleteEmptyTextSelection) {
+  for (int i = 0; i < 50; ++i) {
+    EXPECT_TRUE(GetCFFLFormFiller()->OnChar(GetCPDFSDKAnnot(), i + 'A', 0));
+  }
+
+  GetCPWLEdit()->DeleteSelectedText();
+  EXPECT_STREQ(L"ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqr",
+               GetCPWLEdit()->GetText().c_str());
+}