1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "core/fxcrt/fx_string.h" 6 #include "public/fpdf_structtree.h" 7 #include "testing/embedder_test.h" 8 #include "testing/test_support.h" 9 #include "third_party/base/optional.h" 10 11 class FPDFStructTreeEmbeddertest : public EmbedderTest {}; 12 13 TEST_F(FPDFStructTreeEmbeddertest, GetAltText) { 14 ASSERT_TRUE(OpenDocument("tagged_alt_text.pdf")); 15 FPDF_PAGE page = LoadPage(0); 16 ASSERT_TRUE(page); 17 18 FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page); 19 ASSERT_TRUE(struct_tree); 20 ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree)); 21 22 FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, -1); 23 EXPECT_EQ(nullptr, element); 24 element = FPDF_StructTree_GetChildAtIndex(struct_tree, 1); 25 EXPECT_EQ(nullptr, element); 26 element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0); 27 ASSERT_NE(nullptr, element); 28 EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(element)); 29 EXPECT_EQ(0U, FPDF_StructElement_GetAltText(element, nullptr, 0)); 30 31 ASSERT_EQ(1, FPDF_StructElement_CountChildren(element)); 32 FPDF_STRUCTELEMENT child_element = 33 FPDF_StructElement_GetChildAtIndex(element, -1); 34 EXPECT_EQ(nullptr, child_element); 35 child_element = FPDF_StructElement_GetChildAtIndex(element, 1); 36 EXPECT_EQ(nullptr, child_element); 37 child_element = FPDF_StructElement_GetChildAtIndex(element, 0); 38 ASSERT_NE(nullptr, child_element); 39 EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(child_element)); 40 EXPECT_EQ(0U, FPDF_StructElement_GetAltText(child_element, nullptr, 0)); 41 42 ASSERT_EQ(1, FPDF_StructElement_CountChildren(child_element)); 43 FPDF_STRUCTELEMENT gchild_element = 44 FPDF_StructElement_GetChildAtIndex(child_element, -1); 45 EXPECT_EQ(nullptr, gchild_element); 46 gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 1); 47 EXPECT_EQ(nullptr, gchild_element); 48 gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 0); 49 ASSERT_NE(nullptr, gchild_element); 50 EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(gchild_element)); 51 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, nullptr, 0)); 52 53 unsigned short buffer[12]; 54 memset(buffer, 0, sizeof(buffer)); 55 // Deliberately pass in a small buffer size to make sure |buffer| remains 56 // untouched. 57 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer, 1)); 58 for (size_t i = 0; i < FX_ArraySize(buffer); ++i) 59 EXPECT_EQ(0U, buffer[i]); 60 61 EXPECT_EQ(-1, FPDF_StructElement_GetMarkedContentID(gchild_element)); 62 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer, 63 sizeof(buffer))); 64 const wchar_t kExpected[] = L"Black Image"; 65 EXPECT_EQ(WideString(kExpected), 66 WideString::FromUTF16LE(buffer, FXSYS_len(kExpected))); 67 68 ASSERT_EQ(1, FPDF_StructElement_CountChildren(gchild_element)); 69 FPDF_STRUCTELEMENT ggchild_element = 70 FPDF_StructElement_GetChildAtIndex(gchild_element, 0); 71 EXPECT_EQ(nullptr, ggchild_element); 72 73 FPDF_StructTree_Close(struct_tree); 74 FPDF_ClosePage(page); 75 } 76 77 TEST_F(FPDFStructTreeEmbeddertest, GetMarkedContentID) { 78 ASSERT_TRUE(OpenDocument("marked_content_id.pdf")); 79 FPDF_PAGE page = LoadPage(0); 80 ASSERT_TRUE(page); 81 82 FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page); 83 ASSERT_TRUE(struct_tree); 84 ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree)); 85 86 FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0); 87 EXPECT_EQ(0, FPDF_StructElement_GetMarkedContentID(element)); 88 89 FPDF_StructTree_Close(struct_tree); 90 FPDF_ClosePage(page); 91 } 92 93 TEST_F(FPDFStructTreeEmbeddertest, GetType) { 94 ASSERT_TRUE(OpenDocument("tagged_alt_text.pdf")); 95 FPDF_PAGE page = LoadPage(0); 96 ASSERT_TRUE(page); 97 98 FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page); 99 ASSERT_TRUE(struct_tree); 100 ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree)); 101 102 FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0); 103 ASSERT_NE(nullptr, element); 104 105 unsigned short buffer[12]; 106 memset(buffer, 0, sizeof(buffer)); 107 // Deliberately pass in a small buffer size to make sure |buffer| remains 108 // untouched. 109 ASSERT_EQ(18U, FPDF_StructElement_GetType(element, buffer, 1)); 110 for (size_t i = 0; i < FX_ArraySize(buffer); ++i) 111 EXPECT_EQ(0U, buffer[i]); 112 113 ASSERT_EQ(18U, FPDF_StructElement_GetType(element, buffer, sizeof(buffer))); 114 const wchar_t kExpected[] = L"Document"; 115 EXPECT_EQ(WideString(kExpected), 116 WideString::FromUTF16LE(buffer, FXSYS_len(kExpected))); 117 118 FPDF_StructTree_Close(struct_tree); 119 FPDF_ClosePage(page); 120 } 121
