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
TEST_F(FPDFStructTreeEmbeddertest,GetAltText)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
TEST_F(FPDFStructTreeEmbeddertest,GetMarkedContentID)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
TEST_F(FPDFStructTreeEmbeddertest,GetType)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