Add embeddertest for form text rendering and saving

This CL adds an embeddertest that adds text to a textfield and saves it. It
also adds a new 'charcode' option for .evt files in pdfium_test.

Change-Id: I14fbf50e2b1d5ae0bdc68d1dd25dc4f889c49bfb
Reviewed-on: https://pdfium-review.googlesource.com/4150
Commit-Queue: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 68 insertions, 1 deletions

diff --git a/fpdfsdk/fpdfformfill_embeddertest.cpp b/fpdfsdk/fpdfformfill_embeddertest.cpp
index 47f1a75efb..631a6a2e7c 100644
--- a/fpdfsdk/fpdfformfill_embeddertest.cpp
+++ b/fpdfsdk/fpdfformfill_embeddertest.cpp
@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <memory>
+#include <string>
+
+#include "core/fxcrt/fx_system.h"
+#include "public/cpp/fpdf_deleters.h"
 #include "public/fpdf_formfill.h"
 #include "testing/embedder_test.h"
 #include "testing/embedder_test_mock_delegate.h"
@@ -12,7 +17,7 @@
 using testing::_;
 using testing::Return;
 
-class FPDFFormFillEmbeddertest : public EmbedderTest {};
+class FPDFFormFillEmbeddertest : public EmbedderTest, public TestSaver {};
 
 TEST_F(FPDFFormFillEmbeddertest, FirstTest) {
   EmbedderTestMockDelegate mock;
@@ -197,3 +202,65 @@ TEST_F(FPDFFormFillEmbeddertest, BUG_679649) {
 }
 
 #endif  // PDF_ENABLE_V8
+
+TEST_F(FPDFFormFillEmbeddertest, FormText) {
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+  const char md5_1[] = "5f11dbe575fe197a37c3fb422559f8ff";
+  const char md5_2[] = "35b1a4b679eafc749a0b6fda750c0e8d";
+  const char md5_3[] = "65c64a7c355388f719a752aa1e23f6fe";
+#else
+  const char md5_1[] = "23baecc6e94d4c8b894cd39aa04c584c";
+  const char md5_2[] = "499df95d477dfe35ee65b823c69743b5";
+  const char md5_3[] = "8f91b62895fc505d9e17ff2d633756d4";
+#endif
+  {
+    EXPECT_TRUE(OpenDocument("text_form.pdf"));
+    FPDF_PAGE page = LoadPage(0);
+    ASSERT_TRUE(page);
+    std::unique_ptr<void, FPDFBitmapDeleter> bitmap1(RenderPage(page));
+    CompareBitmap(bitmap1.get(), 300, 300, md5_1);
+
+    // Click on the textfield
+    EXPECT_EQ(FPDF_FORMFIELD_TEXTFIELD,
+              FPDFPage_HasFormFieldAtPoint(form_handle(), page, 120.0, 120.0));
+    FORM_OnMouseMove(form_handle(), page, 0, 120.0, 120.0);
+    FORM_OnLButtonDown(form_handle(), page, 0, 120.0, 120.0);
+    FORM_OnLButtonUp(form_handle(), page, 0, 120.0, 120.0);
+
+    // Write "ABC"
+    FORM_OnChar(form_handle(), page, 65, 0);
+    FORM_OnChar(form_handle(), page, 66, 0);
+    FORM_OnChar(form_handle(), page, 67, 0);
+    std::unique_ptr<void, FPDFBitmapDeleter> bitmap2(RenderPage(page));
+    CompareBitmap(bitmap2.get(), 300, 300, md5_2);
+
+    // Take out focus by clicking out of the textfield
+    FORM_OnMouseMove(form_handle(), page, 0, 15.0, 15.0);
+    FORM_OnLButtonDown(form_handle(), page, 0, 15.0, 15.0);
+    FORM_OnLButtonUp(form_handle(), page, 0, 15.0, 15.0);
+    std::unique_ptr<void, FPDFBitmapDeleter> bitmap3(RenderPage(page));
+    CompareBitmap(bitmap3.get(), 300, 300, md5_3);
+
+    EXPECT_TRUE(FPDF_SaveAsCopy(document(), this, 0));
+
+    // Close everything
+    UnloadPage(page);
+    FPDFDOC_ExitFormFillEnvironment(form_handle_);
+    FPDF_CloseDocument(document_);
+  }
+  // Check saved document
+  std::string new_file = GetString();
+  FPDF_FILEACCESS file_access;
+  memset(&file_access, 0, sizeof(file_access));
+  file_access.m_FileLen = new_file.size();
+  file_access.m_GetBlock = GetBlockFromString;
+  file_access.m_Param = &new_file;
+  document_ = FPDF_LoadCustomDocument(&file_access, nullptr);
+  SetupFormFillEnvironment();
+  EXPECT_EQ(1, FPDF_GetPageCount(document_));
+  std::unique_ptr<void, FPDFPageDeleter> new_page(FPDF_LoadPage(document_, 0));
+  ASSERT_TRUE(new_page.get());
+  std::unique_ptr<void, FPDFBitmapDeleter> new_bitmap(
+      RenderPage(new_page.get()));
+  CompareBitmap(new_bitmap.get(), 300, 300, md5_3);
+}