// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "fpdfsdk/cpdfsdk_annot.h"
#include "fpdfsdk/cpdfsdk_annotiterator.h"
#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
#include "fpdfsdk/cpdfsdk_helpers.h"
#include "testing/embedder_test.h"
#include "testing/embedder_test_mock_delegate.h"
#include "testing/embedder_test_timer_handling_delegate.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {

void CheckRect(const CFX_FloatRect& actual, const CFX_FloatRect& expected) {
  EXPECT_EQ(expected.left, actual.left);
  EXPECT_EQ(expected.bottom, actual.bottom);
  EXPECT_EQ(expected.right, actual.right);
  EXPECT_EQ(expected.top, actual.top);
}

}  // namespace

class CPDFSDKAnnotIteratorTest : public EmbedderTest {};

TEST_F(CPDFSDKAnnotIteratorTest, AnnotIterator) {
  ASSERT_TRUE(OpenDocument("annotiter.pdf"));
  ScopedEmbedderTestPage page0 = LoadScopedPage(0);
  ScopedEmbedderTestPage page1 = LoadScopedPage(1);
  ScopedEmbedderTestPage page2 = LoadScopedPage(2);
  ASSERT_TRUE(page0);
  ASSERT_TRUE(page1);
  ASSERT_TRUE(page2);

  CFX_FloatRect LeftBottom(200, 200, 220, 220);
  CFX_FloatRect RightBottom(400, 201, 420, 221);
  CFX_FloatRect LeftTop(201, 400, 221, 420);
  CFX_FloatRect RightTop(401, 401, 421, 421);

  CPDFSDK_FormFillEnvironment* pFormFillEnv =
      CPDFSDKFormFillEnvironmentFromFPDFFormHandle(form_handle());

  {
    // Page 0 specifies "row order".
    CPDFSDK_AnnotIterator iter(pFormFillEnv->GetPageViewAtIndex(0),
                               {CPDF_Annot::Subtype::WIDGET});
    CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);

    pAnnot = iter.GetLastAnnot();
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);
  }
  {
    // Page 1 specifies "column order"
    CPDFSDK_AnnotIterator iter(pFormFillEnv->GetPageViewAtIndex(1),
                               {CPDF_Annot::Subtype::WIDGET});
    CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);

    pAnnot = iter.GetLastAnnot();
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);
  }
  {
    // Page 2 specifies "struct order"
    CPDFSDK_AnnotIterator iter(pFormFillEnv->GetPageViewAtIndex(2),
                               {CPDF_Annot::Subtype::WIDGET});
    CPDFSDK_Annot* pAnnot = iter.GetFirstAnnot();
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetNextAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetNextAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);

    pAnnot = iter.GetLastAnnot();
    CheckRect(pAnnot->GetRect(), RightBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), RightTop);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    CheckRect(pAnnot->GetRect(), LeftBottom);
    pAnnot = iter.GetPrevAnnot(pAnnot);
    EXPECT_FALSE(pAnnot);
  }
}