| // Copyright 2017 The PDFium Authors |
| // 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 <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_name.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 "testing/invalid_seekable_read_stream.h" |
| #include "third_party/base/check.h" |
| |
| namespace { |
| |
| class TestReadValidator final : public CPDF_ReadValidator { |
| public: |
| CONSTRUCT_VIA_MAKE_RETAIN; |
| |
| void SimulateReadError() { ReadBlockAtOffset({}, 0); } |
| |
| private: |
| TestReadValidator() |
| : CPDF_ReadValidator(pdfium::MakeRetain<InvalidSeekableReadStream>(100), |
| nullptr) {} |
| ~TestReadValidator() override = default; |
| }; |
| |
| class TestHolder final : public CPDF_IndirectObjectHolder { |
| public: |
| enum class ObjectState { |
| Unavailable, |
| Available, |
| }; |
| TestHolder() : validator_(pdfium::MakeRetain<TestReadValidator>()) {} |
| ~TestHolder() override = default; |
| |
| // CPDF_IndirectObjectHolder overrides: |
| RetainPtr<CPDF_Object> ParseIndirectObject(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; |
| } |
| |
| RetainPtr<CPDF_ReadValidator> GetValidator() { return validator_; } |
| |
| void AddObject(uint32_t objnum, |
| RetainPtr<CPDF_Object> object, |
| ObjectState state) { |
| ObjectData object_data; |
| object_data.object = std::move(object); |
| object_data.state = state; |
| DCHECK(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); |
| DCHECK(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 { |
| RetainPtr<CPDF_Object> object; |
| ObjectState state = ObjectState::Unavailable; |
| }; |
| std::map<uint32_t, ObjectData> objects_data_; |
| RetainPtr<TestReadValidator> validator_; |
| }; |
| |
| } // namespace |
| |
| TEST(PageObjectAvailTest, ExcludePages) { |
| TestHolder holder; |
| holder.AddObject(1, pdfium::MakeRetain<CPDF_Dictionary>(), |
| TestHolder::ObjectState::Available); |
| holder.GetTestObject(1)->GetMutableDict()->SetNewFor<CPDF_Reference>( |
| "Kids", &holder, 2); |
| holder.AddObject(2, pdfium::MakeRetain<CPDF_Array>(), |
| TestHolder::ObjectState::Available); |
| holder.GetTestObject(2)->AsMutableArray()->AppendNew<CPDF_Reference>(&holder, |
| 3); |
| |
| holder.AddObject(3, pdfium::MakeRetain<CPDF_Dictionary>(), |
| TestHolder::ObjectState::Available); |
| holder.GetTestObject(3)->GetMutableDict()->SetFor( |
| "Type", pdfium::MakeRetain<CPDF_Name>(nullptr, "Page")); |
| holder.GetTestObject(3)->GetMutableDict()->SetNewFor<CPDF_Reference>( |
| "OtherPageData", &holder, 4); |
| // Add unavailable object related to other page. |
| holder.AddObject( |
| 4, pdfium::MakeRetain<CPDF_String>(nullptr, "Other page data", false), |
| TestHolder::ObjectState::Unavailable); |
| |
| CPDF_PageObjectAvail avail(holder.GetValidator(), &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::kDataAvailable, avail.CheckAvail()); |
| } |