// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "core/fxcrt/fx_string.h"
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#include "public/fpdf_structtree.h"
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#include "testing/embedder_test.h"
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#include "testing/test_support.h"
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#include "third_party/base/optional.h"
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class FPDFStructTreeEmbeddertest : public EmbedderTest {};
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TEST_F(FPDFStructTreeEmbeddertest, GetAltText) {
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ASSERT_TRUE(OpenDocument("tagged_alt_text.pdf"));
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FPDF_PAGE page = LoadPage(0);
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ASSERT_TRUE(page);
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FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page);
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ASSERT_TRUE(struct_tree);
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ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree));
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FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, -1);
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EXPECT_EQ(nullptr, element);
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element = FPDF_StructTree_GetChildAtIndex(struct_tree, 1);
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EXPECT_EQ(nullptr, element);
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element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0);
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ASSERT_NE(nullptr, element);
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EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(element));
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EXPECT_EQ(0U, FPDF_StructElement_GetAltText(element, nullptr, 0));
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ASSERT_EQ(1, FPDF_StructElement_CountChildren(element));
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FPDF_STRUCTELEMENT child_element =
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FPDF_StructElement_GetChildAtIndex(element, -1);
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EXPECT_EQ(nullptr, child_element);
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child_element = FPDF_StructElement_GetChildAtIndex(element, 1);
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EXPECT_EQ(nullptr, child_element);
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child_element = FPDF_StructElement_GetChildAtIndex(element, 0);
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ASSERT_NE(nullptr, child_element);
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EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(child_element));
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EXPECT_EQ(0U, FPDF_StructElement_GetAltText(child_element, nullptr, 0));
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ASSERT_EQ(1, FPDF_StructElement_CountChildren(child_element));
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FPDF_STRUCTELEMENT gchild_element =
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FPDF_StructElement_GetChildAtIndex(child_element, -1);
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EXPECT_EQ(nullptr, gchild_element);
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gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 1);
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EXPECT_EQ(nullptr, gchild_element);
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gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 0);
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ASSERT_NE(nullptr, gchild_element);
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EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(gchild_element));
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ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, nullptr, 0));
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unsigned short buffer[12];
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memset(buffer, 0, sizeof(buffer));
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// Deliberately pass in a small buffer size to make sure |buffer| remains
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// untouched.
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ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer, 1));
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for (size_t i = 0; i < FX_ArraySize(buffer); ++i)
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EXPECT_EQ(0U, buffer[i]);
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EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(gchild_element));
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ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer,
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sizeof(buffer)));
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const wchar_t kExpected[] = L"Black Image";
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EXPECT_EQ(WideString(kExpected),
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WideString::FromUTF16LE(buffer, FXSYS_len(kExpected)));
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ASSERT_EQ(1, FPDF_StructElement_CountChildren(gchild_element));
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FPDF_STRUCTELEMENT ggchild_element =
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FPDF_StructElement_GetChildAtIndex(gchild_element, 0);
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EXPECT_EQ(nullptr, ggchild_element);
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FPDF_StructTree_Close(struct_tree);
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FPDF_ClosePage(page);
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}
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TEST_F(FPDFStructTreeEmbeddertest, GetMarkedContentID) {
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ASSERT_TRUE(OpenDocument("marked_content_id.pdf"));
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FPDF_PAGE page = LoadPage(0);
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ASSERT_TRUE(page);
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FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page);
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ASSERT_TRUE(struct_tree);
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ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree));
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FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0);
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EXPECT_EQ(0, FPDF_StructElement_GetMarkedContentID(element));
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FPDF_StructTree_Close(struct_tree);
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FPDF_ClosePage(page);
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}
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TEST_F(FPDFStructTreeEmbeddertest, GetType) {
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ASSERT_TRUE(OpenDocument("tagged_alt_text.pdf"));
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FPDF_PAGE page = LoadPage(0);
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ASSERT_TRUE(page);
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FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page);
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ASSERT_TRUE(struct_tree);
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ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree));
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FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0);
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ASSERT_NE(nullptr, element);
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unsigned short buffer[12];
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memset(buffer, 0, sizeof(buffer));
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// Deliberately pass in a small buffer size to make sure |buffer| remains
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// untouched.
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ASSERT_EQ(18U, FPDF_StructElement_GetType(element, buffer, 1));
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for (size_t i = 0; i < FX_ArraySize(buffer); ++i)
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EXPECT_EQ(0U, buffer[i]);
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ASSERT_EQ(18U, FPDF_StructElement_GetType(element, buffer, sizeof(buffer)));
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const wchar_t kExpected[] = L"Document";
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EXPECT_EQ(WideString(kExpected),
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WideString::FromUTF16LE(buffer, FXSYS_len(kExpected)));
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FPDF_StructTree_Close(struct_tree);
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FPDF_ClosePage(page);
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}
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