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// Copyright 2017 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "core/fpdfapi/parser/cpdf_hint_tables.h"
#include <memory>
#include <string>
#include <utility>
#include "core/fpdfapi/cpdf_modulemgr.h"
#include "core/fpdfapi/parser/cpdf_data_avail.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_linearized_header.h"
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_syntax_parser.h"
#include "core/fxcrt/fx_stream.h"
#include "testing/fx_string_testhelpers.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/utils/path_service.h"
#include "third_party/base/ptr_util.h"
namespace {
RetainPtr<CPDF_ReadValidator> MakeValidatorFromFile(
const std::string& file_name) {
std::string file_path;
PathService::GetTestFilePath(file_name, &file_path);
ASSERT(!file_path.empty());
return pdfium::MakeRetain<CPDF_ReadValidator>(
IFX_SeekableReadStream::CreateFromFilename(file_path.c_str()), nullptr);
}
std::unique_ptr<CPDF_DataAvail> MakeDataAvailFromFile(
const std::string& file_name) {
return pdfium::MakeUnique<CPDF_DataAvail>(
nullptr, MakeValidatorFromFile(file_name), true);
}
class TestLinearizedHeader : public CPDF_LinearizedHeader {
public:
TestLinearizedHeader(const CPDF_Dictionary* pDict,
FX_FILESIZE szLastXRefOffset)
: CPDF_LinearizedHeader(pDict, szLastXRefOffset) {}
static std::unique_ptr<CPDF_LinearizedHeader> MakeHeader(
const std::string& inline_data) {
CPDF_SyntaxParser parser;
parser.InitParser(
pdfium::MakeRetain<CFX_BufferSeekableReadStream>(
reinterpret_cast<const unsigned char*>(inline_data.data()),
inline_data.size()),
0);
std::unique_ptr<CPDF_Dictionary> dict =
ToDictionary(parser.GetObjectBody(nullptr));
ASSERT(dict);
return pdfium::MakeUnique<TestLinearizedHeader>(dict.get(), 0);
}
};
} // namespace
class CPDF_HintTablesTest : public testing::Test {
public:
CPDF_HintTablesTest() {
// Needs for encoding Hint table stream.
CPDF_ModuleMgr::Get()->Init();
}
~CPDF_HintTablesTest() override { CPDF_ModuleMgr::Destroy(); }
};
TEST_F(CPDF_HintTablesTest, Load) {
auto data_avail = MakeDataAvailFromFile("feature_linearized_loading.pdf");
ASSERT_EQ(CPDF_DataAvail::DocAvailStatus::DataAvailable,
data_avail->IsDocAvail(nullptr));
ASSERT_TRUE(data_avail->GetHintTables());
const CPDF_HintTables* hint_tables = data_avail->GetHintTables();
FX_FILESIZE page_start = 0;
FX_FILESIZE page_length = 0;
uint32_t page_obj_num = 0;
ASSERT_TRUE(
hint_tables->GetPagePos(0, &page_start, &page_length, &page_obj_num));
EXPECT_EQ(777, page_start);
EXPECT_EQ(4328, page_length);
EXPECT_EQ(39u, page_obj_num);
ASSERT_TRUE(
hint_tables->GetPagePos(1, &page_start, &page_length, &page_obj_num));
EXPECT_EQ(5105, page_start);
EXPECT_EQ(767, page_length);
EXPECT_EQ(1u, page_obj_num);
ASSERT_FALSE(
hint_tables->GetPagePos(2, &page_start, &page_length, &page_obj_num));
}
TEST_F(CPDF_HintTablesTest, PageAndGroupInfos) {
auto data_avail = MakeDataAvailFromFile("feature_linearized_loading.pdf");
ASSERT_EQ(CPDF_DataAvail::DocAvailStatus::DataAvailable,
data_avail->IsDocAvail(nullptr));
const CPDF_HintTables* hint_tables = data_avail->GetHintTables();
ASSERT_TRUE(hint_tables);
ASSERT_EQ(2u, hint_tables->PageInfos().size());
EXPECT_EQ(5u, hint_tables->PageInfos()[0].objects_count());
EXPECT_EQ(777, hint_tables->PageInfos()[0].page_offset());
EXPECT_EQ(4328u, hint_tables->PageInfos()[0].page_length());
EXPECT_EQ(39u, hint_tables->PageInfos()[0].start_obj_num());
ASSERT_EQ(2u, hint_tables->PageInfos()[0].Identifiers().size());
EXPECT_EQ(0u, hint_tables->PageInfos()[0].Identifiers()[0]);
EXPECT_EQ(0u, hint_tables->PageInfos()[0].Identifiers()[1]);
EXPECT_EQ(3u, hint_tables->PageInfos()[1].objects_count());
EXPECT_EQ(5105, hint_tables->PageInfos()[1].page_offset());
EXPECT_EQ(767u, hint_tables->PageInfos()[1].page_length());
EXPECT_EQ(1u, hint_tables->PageInfos()[1].start_obj_num());
ASSERT_EQ(3u, hint_tables->PageInfos()[1].Identifiers().size());
EXPECT_EQ(2u, hint_tables->PageInfos()[1].Identifiers()[0]);
EXPECT_EQ(5u, hint_tables->PageInfos()[1].Identifiers()[1]);
EXPECT_EQ(3u, hint_tables->PageInfos()[1].Identifiers()[2]);
// SharedGroupInfo
ASSERT_EQ(6u, hint_tables->SharedGroupInfos().size());
EXPECT_EQ(777, hint_tables->SharedGroupInfos()[0].m_szOffset);
EXPECT_EQ(254u, hint_tables->SharedGroupInfos()[0].m_dwLength);
EXPECT_EQ(1031, hint_tables->SharedGroupInfos()[1].m_szOffset);
EXPECT_EQ(389u, hint_tables->SharedGroupInfos()[1].m_dwLength);
EXPECT_EQ(1420, hint_tables->SharedGroupInfos()[2].m_szOffset);
EXPECT_EQ(726u, hint_tables->SharedGroupInfos()[2].m_dwLength);
EXPECT_EQ(2146, hint_tables->SharedGroupInfos()[3].m_szOffset);
EXPECT_EQ(290u, hint_tables->SharedGroupInfos()[3].m_dwLength);
EXPECT_EQ(2436, hint_tables->SharedGroupInfos()[4].m_szOffset);
EXPECT_EQ(2669u, hint_tables->SharedGroupInfos()[4].m_dwLength);
EXPECT_EQ(10939, hint_tables->SharedGroupInfos()[5].m_szOffset);
EXPECT_EQ(544u, hint_tables->SharedGroupInfos()[5].m_dwLength);
}
TEST_F(CPDF_HintTablesTest, FirstPageOffset) {
// Test that valid hint table is loaded, and have correct offset of first page
// object.
const auto linearized_header = TestLinearizedHeader::MakeHeader(
"<< /Linearized 1 /L 19326762 /H [ 123730 3816 ] /O 5932 /E 639518 /N "
"102 /T 19220281 >>");
ASSERT_TRUE(linearized_header);
// This hint table is extracted from linearized file, generated by qpdf tool.
RetainPtr<CPDF_ReadValidator> validator =
MakeValidatorFromFile("hint_table_102p.bin");
CPDF_SyntaxParser parser;
parser.InitParserWithValidator(validator, 0);
std::unique_ptr<CPDF_Stream> stream = ToStream(parser.GetObjectBody(nullptr));
ASSERT_TRUE(stream);
auto hint_tables = pdfium::MakeUnique<CPDF_HintTables>(
validator.Get(), linearized_header.get());
// Check that hint table will load.
ASSERT_TRUE(hint_tables->LoadHintStream(stream.get()));
// Check that hint table have correct first page offset.
// 127546 is predefined real value from original file.
EXPECT_EQ(127546, hint_tables->GetFirstPageObjOffset());
}
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