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// Copyright 2016 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_document.h"
#include <memory>
#include <utility>
#include "core/fpdfapi/cpdf_modulemgr.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_boolean.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_linearized_header.h"
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_number.h"
#include "core/fpdfapi/parser/cpdf_parser.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fxcrt/fx_memory.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/base/ptr_util.h"
namespace {
const int kNumTestPages = 7;
CPDF_Dictionary* CreatePageTreeNode(std::unique_ptr<CPDF_Array> kids,
CPDF_Document* pDoc,
int count) {
CPDF_Array* pUnowned = pDoc->AddIndirectObject(std::move(kids))->AsArray();
CPDF_Dictionary* pageNode = pDoc->NewIndirect<CPDF_Dictionary>();
pageNode->SetNewFor<CPDF_String>("Type", "Pages", false);
pageNode->SetNewFor<CPDF_Reference>("Kids", pDoc, pUnowned->GetObjNum());
pageNode->SetNewFor<CPDF_Number>("Count", count);
for (size_t i = 0; i < pUnowned->GetCount(); i++) {
pUnowned->GetDictAt(i)->SetNewFor<CPDF_Reference>("Parent", pDoc,
pageNode->GetObjNum());
}
return pageNode;
}
std::unique_ptr<CPDF_Dictionary> CreateNumberedPage(size_t number) {
auto page = pdfium::MakeUnique<CPDF_Dictionary>();
page->SetNewFor<CPDF_String>("Type", "Page", false);
page->SetNewFor<CPDF_Number>("PageNumbering", static_cast<int>(number));
return page;
}
class CPDF_TestDocumentForPages : public CPDF_Document {
public:
CPDF_TestDocumentForPages() : CPDF_Document() {
// Set up test
auto zeroToTwo = pdfium::MakeUnique<CPDF_Array>();
zeroToTwo->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(0))->GetObjNum());
zeroToTwo->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(1))->GetObjNum());
zeroToTwo->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(2))->GetObjNum());
CPDF_Dictionary* branch1 =
CreatePageTreeNode(std::move(zeroToTwo), this, 3);
auto zeroToThree = pdfium::MakeUnique<CPDF_Array>();
zeroToThree->AddNew<CPDF_Reference>(this, branch1->GetObjNum());
zeroToThree->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(3))->GetObjNum());
CPDF_Dictionary* branch2 =
CreatePageTreeNode(std::move(zeroToThree), this, 4);
auto fourFive = pdfium::MakeUnique<CPDF_Array>();
fourFive->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(4))->GetObjNum());
fourFive->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(5))->GetObjNum());
CPDF_Dictionary* branch3 = CreatePageTreeNode(std::move(fourFive), this, 2);
auto justSix = pdfium::MakeUnique<CPDF_Array>();
justSix->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(6))->GetObjNum());
CPDF_Dictionary* branch4 = CreatePageTreeNode(std::move(justSix), this, 1);
auto allPages = pdfium::MakeUnique<CPDF_Array>();
allPages->AddNew<CPDF_Reference>(this, branch2->GetObjNum());
allPages->AddNew<CPDF_Reference>(this, branch3->GetObjNum());
allPages->AddNew<CPDF_Reference>(this, branch4->GetObjNum());
CPDF_Dictionary* pagesDict =
CreatePageTreeNode(std::move(allPages), this, kNumTestPages);
m_pRootDict = NewIndirect<CPDF_Dictionary>();
m_pRootDict->SetNewFor<CPDF_Reference>("Pages", this,
pagesDict->GetObjNum());
m_PageList.resize(kNumTestPages);
}
void SetTreeSize(int size) {
m_pRootDict->SetNewFor<CPDF_Number>("Count", size);
m_PageList.resize(size);
}
};
class CPDF_TestDocumentWithPageWithoutPageNum : public CPDF_Document {
public:
CPDF_TestDocumentWithPageWithoutPageNum() : CPDF_Document() {
// Set up test
auto allPages = pdfium::MakeUnique<CPDF_Array>();
allPages->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(0))->GetObjNum());
allPages->AddNew<CPDF_Reference>(
this, AddIndirectObject(CreateNumberedPage(1))->GetObjNum());
// Page without pageNum.
inlined_page_ = allPages->Add(CreateNumberedPage(2));
CPDF_Dictionary* pagesDict =
CreatePageTreeNode(std::move(allPages), this, 3);
m_pRootDict = NewIndirect<CPDF_Dictionary>();
m_pRootDict->SetNewFor<CPDF_Reference>("Pages", this,
pagesDict->GetObjNum());
m_PageList.resize(3);
}
const CPDF_Object* inlined_page() const { return inlined_page_; }
private:
const CPDF_Object* inlined_page_;
};
class TestLinearized : public CPDF_LinearizedHeader {
public:
explicit TestLinearized(CPDF_Dictionary* dict)
: CPDF_LinearizedHeader(dict, 0) {}
};
class CPDF_TestDocPagesWithoutKids : public CPDF_Document {
public:
CPDF_TestDocPagesWithoutKids() : CPDF_Document() {
CPDF_Dictionary* pagesDict = NewIndirect<CPDF_Dictionary>();
pagesDict->SetNewFor<CPDF_Name>("Type", "Pages");
pagesDict->SetNewFor<CPDF_Number>("Count", 3);
m_PageList.resize(10);
m_pRootDict = NewIndirect<CPDF_Dictionary>();
m_pRootDict->SetNewFor<CPDF_Reference>("Pages", this,
pagesDict->GetObjNum());
}
};
class CPDF_TestDocumentAllowSetParser : public CPDF_Document {
public:
using CPDF_Document::SetParser;
};
} // namespace
class cpdf_document_test : public testing::Test {
public:
void SetUp() override { CPDF_ModuleMgr::Get()->Init(); }
void TearDown() override { CPDF_ModuleMgr::Destroy(); }
};
TEST_F(cpdf_document_test, GetPages) {
std::unique_ptr<CPDF_TestDocumentForPages> document =
pdfium::MakeUnique<CPDF_TestDocumentForPages>();
for (int i = 0; i < kNumTestPages; i++) {
CPDF_Dictionary* page = document->GetPageDictionary(i);
ASSERT_TRUE(page);
ASSERT_TRUE(page->KeyExist("PageNumbering"));
EXPECT_EQ(i, page->GetIntegerFor("PageNumbering"));
}
CPDF_Dictionary* page = document->GetPageDictionary(kNumTestPages);
EXPECT_FALSE(page);
}
TEST_F(cpdf_document_test, GetPageWithoutObjNumTwice) {
auto document = pdfium::MakeUnique<CPDF_TestDocumentWithPageWithoutPageNum>();
CPDF_Dictionary* page = document->GetPageDictionary(2);
ASSERT_TRUE(page);
ASSERT_EQ(document->inlined_page(), page);
CPDF_Dictionary* second_call_page = document->GetPageDictionary(2);
EXPECT_TRUE(second_call_page);
EXPECT_EQ(page, second_call_page);
}
TEST_F(cpdf_document_test, GetPagesReverseOrder) {
std::unique_ptr<CPDF_TestDocumentForPages> document =
pdfium::MakeUnique<CPDF_TestDocumentForPages>();
for (int i = 6; i >= 0; i--) {
CPDF_Dictionary* page = document->GetPageDictionary(i);
ASSERT_TRUE(page);
ASSERT_TRUE(page->KeyExist("PageNumbering"));
EXPECT_EQ(i, page->GetIntegerFor("PageNumbering"));
}
CPDF_Dictionary* page = document->GetPageDictionary(kNumTestPages);
EXPECT_FALSE(page);
}
TEST_F(cpdf_document_test, GetPagesInDisorder) {
std::unique_ptr<CPDF_TestDocumentForPages> document =
pdfium::MakeUnique<CPDF_TestDocumentForPages>();
CPDF_Dictionary* page = document->GetPageDictionary(1);
ASSERT_TRUE(page);
ASSERT_TRUE(page->KeyExist("PageNumbering"));
EXPECT_EQ(1, page->GetIntegerFor("PageNumbering"));
page = document->GetPageDictionary(3);
ASSERT_TRUE(page);
ASSERT_TRUE(page->KeyExist("PageNumbering"));
EXPECT_EQ(3, page->GetIntegerFor("PageNumbering"));
page = document->GetPageDictionary(kNumTestPages);
EXPECT_FALSE(page);
page = document->GetPageDictionary(6);
ASSERT_TRUE(page);
ASSERT_TRUE(page->KeyExist("PageNumbering"));
EXPECT_EQ(6, page->GetIntegerFor("PageNumbering"));
}
TEST_F(cpdf_document_test, UseCachedPageObjNumIfHaveNotPagesDict) {
// ObjNum can be added in CPDF_DataAvail::IsPageAvail, and PagesDict
// can be not exists in this case.
// (case, when hint table is used to page check in CPDF_DataAvail).
auto dict = pdfium::MakeUnique<CPDF_Dictionary>();
dict->SetNewFor<CPDF_Boolean>("Linearized", true);
const int page_count = 100;
dict->SetNewFor<CPDF_Number>("N", page_count);
auto linearized = pdfium::MakeUnique<TestLinearized>(dict.get());
auto parser = pdfium::MakeUnique<CPDF_Parser>();
parser->SetLinearizedHeader(std::move(linearized));
CPDF_TestDocumentAllowSetParser document;
document.SetParser(std::move(parser));
document.LoadPages();
ASSERT_EQ(page_count, document.GetPageCount());
CPDF_Object* page_stub = document.NewIndirect<CPDF_Dictionary>();
const uint32_t obj_num = page_stub->GetObjNum();
const int test_page_num = 33;
EXPECT_FALSE(document.IsPageLoaded(test_page_num));
EXPECT_EQ(nullptr, document.GetPageDictionary(test_page_num));
document.SetPageObjNum(test_page_num, obj_num);
EXPECT_TRUE(document.IsPageLoaded(test_page_num));
EXPECT_EQ(page_stub, document.GetPageDictionary(test_page_num));
}
TEST_F(cpdf_document_test, CountGreaterThanPageTree) {
std::unique_ptr<CPDF_TestDocumentForPages> document =
pdfium::MakeUnique<CPDF_TestDocumentForPages>();
document->SetTreeSize(kNumTestPages + 3);
for (int i = 0; i < kNumTestPages; i++)
EXPECT_TRUE(document->GetPageDictionary(i));
for (int i = kNumTestPages; i < kNumTestPages + 4; i++)
EXPECT_FALSE(document->GetPageDictionary(i));
EXPECT_TRUE(document->GetPageDictionary(kNumTestPages - 1));
}
TEST_F(cpdf_document_test, PagesWithoutKids) {
// Set up a document with Pages dict without kids, and Count = 3
auto pDoc = pdfium::MakeUnique<CPDF_TestDocPagesWithoutKids>();
EXPECT_TRUE(pDoc->GetPageDictionary(0));
// Test GetPage does not fetch pages out of range
for (int i = 1; i < 5; i++)
EXPECT_FALSE(pDoc->GetPageDictionary(i));
EXPECT_TRUE(pDoc->GetPageDictionary(0));
}
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