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 10 class FPDFStructTreeEmbeddertest : public EmbedderTest, public TestSaver {}; 11 12 TEST_F(FPDFStructTreeEmbeddertest, GetAltText) { 13 ASSERT_TRUE(OpenDocument("tagged_alt_text.pdf")); 14 FPDF_PAGE page = LoadPage(0); 15 ASSERT_TRUE(page); 16 17 FPDF_STRUCTTREE struct_tree = FPDF_StructTree_GetForPage(page); 18 ASSERT_TRUE(struct_tree); 19 ASSERT_EQ(1, FPDF_StructTree_CountChildren(struct_tree)); 20 21 FPDF_STRUCTELEMENT element = FPDF_StructTree_GetChildAtIndex(struct_tree, -1); 22 EXPECT_EQ(nullptr, element); 23 element = FPDF_StructTree_GetChildAtIndex(struct_tree, 1); 24 EXPECT_EQ(nullptr, element); 25 element = FPDF_StructTree_GetChildAtIndex(struct_tree, 0); 26 ASSERT_NE(nullptr, element); 27 EXPECT_EQ(0U, FPDF_StructElement_GetAltText(element, nullptr, 0)); 28 29 ASSERT_EQ(1, FPDF_StructElement_CountChildren(element)); 30 FPDF_STRUCTELEMENT child_element = 31 FPDF_StructElement_GetChildAtIndex(element, -1); 32 EXPECT_EQ(nullptr, child_element); 33 child_element = FPDF_StructElement_GetChildAtIndex(element, 1); 34 EXPECT_EQ(nullptr, child_element); 35 child_element = FPDF_StructElement_GetChildAtIndex(element, 0); 36 ASSERT_NE(nullptr, child_element); 37 EXPECT_EQ(0U, FPDF_StructElement_GetAltText(child_element, nullptr, 0)); 38 39 ASSERT_EQ(1, FPDF_StructElement_CountChildren(child_element)); 40 FPDF_STRUCTELEMENT gchild_element = 41 FPDF_StructElement_GetChildAtIndex(child_element, -1); 42 EXPECT_EQ(nullptr, gchild_element); 43 gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 1); 44 EXPECT_EQ(nullptr, gchild_element); 45 gchild_element = FPDF_StructElement_GetChildAtIndex(child_element, 0); 46 ASSERT_NE(nullptr, gchild_element); 47 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, nullptr, 0)); 48 49 unsigned short buffer[12]; 50 memset(buffer, 0, sizeof(buffer)); 51 // Deliberately pass in a small buffer size to make sure |buffer| remains 52 // untouched. 53 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer, 1)); 54 for (size_t i = 0; i < FX_ArraySize(buffer); ++i) 55 EXPECT_EQ(0U, buffer[i]); 56 57 ASSERT_EQ(24U, FPDF_StructElement_GetAltText(gchild_element, buffer, 58 sizeof(buffer))); 59 const FX_WCHAR kExpected[] = L"Black Image"; 60 EXPECT_EQ(CFX_WideString(kExpected), 61 CFX_WideString::FromUTF16LE(buffer, FXSYS_len(kExpected))); 62 63 ASSERT_EQ(1, FPDF_StructElement_CountChildren(gchild_element)); 64 FPDF_STRUCTELEMENT ggchild_element = 65 FPDF_StructElement_GetChildAtIndex(gchild_element, 0); 66 EXPECT_EQ(nullptr, ggchild_element); 67 68 FPDF_StructTree_Close(struct_tree); 69 FPDF_ClosePage(page); 70 } 71
