1 /*
2 * Copyright 2020 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7 #include "include/core/SkTypes.h"
8
9 #if defined(SK_SUPPORT_PDF)
10 #include "include/core/SkAnnotation.h"
11 #include "include/core/SkCanvas.h"
12 #include "include/core/SkColor.h"
13 #include "include/core/SkData.h"
14 #include "include/core/SkDocument.h"
15 #include "include/core/SkFont.h"
16 #include "include/core/SkPaint.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkScalar.h"
20 #include "include/core/SkSize.h"
21 #include "include/core/SkStream.h"
22 #include "include/core/SkString.h"
23 #include "include/core/SkTypeface.h"
24 #include "include/docs/SkPDFDocument.h"
25 #include "include/docs/SkPDFJpegHelpers.h"
26 #include "src/pdf/SkPDFUtils.h"
27 #include "tests/Test.h"
28 #include "tools/fonts/FontToolUtils.h"
29
30 #include <memory>
31 #include <utility>
32 #include <vector>
33
34 using PDFTag = SkPDF::StructureElementNode;
35
36 // Test building a tagged PDF with links.
37 // Add this to args.gn to output the PDF to a file:
38 // extra_cflags = [ "-DSK_PDF_TEST_TAGS_OUTPUT_PATH=\"/tmp/links.pdf\"" ]
DEF_TEST(SkPDF_tagged_links,r)39 DEF_TEST(SkPDF_tagged_links, r) {
40 REQUIRE_PDF_DOCUMENT(SkPDF_tagged_links, r);
41 #ifdef SK_PDF_TEST_TAGS_OUTPUT_PATH
42 SkFILEWStream outputStream(SK_PDF_TEST_TAGS_OUTPUT_PATH);
43 #else
44 SkDynamicMemoryWStream outputStream;
45 #endif
46
47 SkSize pageSize = SkSize::Make(612, 792); // U.S. Letter
48
49 SkPDF::Metadata metadata;
50 metadata.fTitle = "Example Tagged PDF With Links";
51 metadata.fCreator = "Skia";
52 SkPDF::DateTime now;
53 SkPDFUtils::GetDateTime(&now);
54 metadata.fCreation = now;
55 metadata.fModified = now;
56 metadata.jpegDecoder = SkPDF::JPEG::Decode;
57 metadata.jpegEncoder = SkPDF::JPEG::Encode;
58
59 // The document tag.
60 auto root = std::make_unique<PDFTag>();
61 root->fNodeId = 1;
62 root->fTypeString = "Document";
63 root->fLang = "en-US";
64
65 // A link.
66 auto l1 = std::make_unique<PDFTag>();
67 l1->fNodeId = 2;
68 l1->fTypeString = "Link";
69 root->fChildVector.push_back(std::move(l1));
70
71 metadata.fStructureElementTreeRoot = root.get();
72 sk_sp<SkDocument> document = SkPDF::MakeDocument(
73 &outputStream, metadata);
74
75 SkPaint paint;
76 paint.setColor(SK_ColorBLUE);
77
78 SkCanvas* canvas =
79 document->beginPage(pageSize.width(),
80 pageSize.height());
81 SkFont font(ToolUtils::DefaultTypeface(), 20);
82
83 // The node ID should cover both the text and the annotation.
84 SkPDF::SetNodeId(canvas, 2);
85 canvas->drawString("Click to visit Google.com", 72, 72, font, paint);
86 SkRect linkRect = SkRect::MakeXYWH(
87 SkIntToScalar(72), SkIntToScalar(54),
88 SkIntToScalar(218), SkIntToScalar(24));
89 sk_sp<SkData> url(SkData::MakeWithCString("http://www.google.com"));
90 SkAnnotateRectWithURL(canvas, linkRect, url.get());
91
92 document->endPage();
93 document->close();
94 outputStream.flush();
95 }
96
97 #endif
98