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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_page_object_avail.h"
#include <map>
#include <memory>
#include <utility>
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_indirect_object_holder.h"
#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fxcrt/fx_stream.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/base/ptr_util.h"
namespace {
class InvalidReader : public IFX_SeekableReadStream {
public:
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
// IFX_SeekableReadStream overrides:
bool ReadBlock(void* buffer, FX_FILESIZE offset, size_t size) override {
return false;
}
FX_FILESIZE GetSize() override { return 100; }
private:
InvalidReader() {}
~InvalidReader() override {}
};
class TestReadValidator : public CPDF_ReadValidator {
public:
template <typename T, typename... Args>
friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
void SimulateReadError() { ReadBlock(nullptr, 0, 1); }
protected:
TestReadValidator()
: CPDF_ReadValidator(pdfium::MakeRetain<InvalidReader>(), nullptr) {}
~TestReadValidator() override {}
};
class TestHolder : public CPDF_IndirectObjectHolder {
public:
enum class ObjectState {
Unavailable,
Available,
};
TestHolder() : validator_(pdfium::MakeRetain<TestReadValidator>()) {}
~TestHolder() override {}
// CPDF_IndirectObjectHolder overrides:
CPDF_Object* GetOrParseIndirectObject(uint32_t objnum) override {
auto it = objects_data_.find(objnum);
if (it == objects_data_.end())
return nullptr;
ObjectData& obj_data = it->second;
if (obj_data.state == ObjectState::Unavailable) {
validator_->SimulateReadError();
return nullptr;
}
return obj_data.object.get();
}
CFX_RetainPtr<CPDF_ReadValidator> GetValidator() { return validator_; }
void AddObject(uint32_t objnum,
std::unique_ptr<CPDF_Object> object,
ObjectState state) {
ObjectData object_data;
object_data.object = std::move(object);
object_data.state = state;
ASSERT(objects_data_.find(objnum) == objects_data_.end());
objects_data_[objnum] = std::move(object_data);
}
void SetObjectState(uint32_t objnum, ObjectState state) {
auto it = objects_data_.find(objnum);
ASSERT(it != objects_data_.end());
ObjectData& obj_data = it->second;
obj_data.state = state;
}
CPDF_Object* GetTestObject(uint32_t objnum) {
auto it = objects_data_.find(objnum);
if (it == objects_data_.end())
return nullptr;
return it->second.object.get();
}
private:
struct ObjectData {
std::unique_ptr<CPDF_Object> object;
ObjectState state = ObjectState::Unavailable;
};
std::map<uint32_t, ObjectData> objects_data_;
CFX_RetainPtr<TestReadValidator> validator_;
};
} // namespace
TEST(CPDF_PageObjectAvailTest, ExcludePages) {
TestHolder holder;
holder.AddObject(1, pdfium::MakeUnique<CPDF_Dictionary>(),
TestHolder::ObjectState::Available);
holder.GetTestObject(1)->GetDict()->SetNewFor<CPDF_Reference>("Kids", &holder,
2);
holder.AddObject(2, pdfium::MakeUnique<CPDF_Array>(),
TestHolder::ObjectState::Available);
holder.GetTestObject(2)->AsArray()->AddNew<CPDF_Reference>(&holder, 3);
holder.AddObject(3, pdfium::MakeUnique<CPDF_Dictionary>(),
TestHolder::ObjectState::Available);
holder.GetTestObject(3)->GetDict()->SetFor(
"Type", pdfium::MakeUnique<CPDF_String>(nullptr, "Page", false));
holder.GetTestObject(3)->GetDict()->SetNewFor<CPDF_Reference>("OtherPageData",
&holder, 4);
// Add unavailable object related to other page.
holder.AddObject(
4, pdfium::MakeUnique<CPDF_String>(nullptr, "Other page data", false),
TestHolder::ObjectState::Unavailable);
CPDF_PageObjectAvail avail(holder.GetValidator().Get(), &holder, 1);
// Now object should be available, although the object '4' is not available,
// because it is in skipped other page.
EXPECT_EQ(CPDF_DataAvail::DocAvailStatus::DataAvailable, avail.CheckAvail());
}
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