2018-09-26 03:29:15 +00:00
|
|
|
/*
|
|
|
|
* Copyright 2018 Google Inc.
|
|
|
|
*
|
|
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
|
|
* found in the LICENSE file.
|
|
|
|
*/
|
|
|
|
#include "Test.h"
|
|
|
|
|
|
|
|
#include "SkCanvas.h"
|
|
|
|
#include "SkPDFDocument.h"
|
|
|
|
#include "SkStream.h"
|
2019-01-08 18:01:58 +00:00
|
|
|
#include "SkFont.h"
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
using PDFTag = SkPDF::StructureElementNode;
|
|
|
|
|
|
|
|
// Test building a tagged PDF.
|
|
|
|
// Add this to args.gn to output the PDF to a file:
|
|
|
|
// extra_cflags = [ "-DSK_PDF_TEST_TAGS_OUTPUT_PATH=\"/tmp/foo.pdf\"" ]
|
|
|
|
DEF_TEST(SkPDF_tagged, r) {
|
2018-10-04 17:34:44 +00:00
|
|
|
REQUIRE_PDF_DOCUMENT(SkPDF_tagged, r);
|
2018-09-26 03:29:15 +00:00
|
|
|
#ifdef SK_PDF_TEST_TAGS_OUTPUT_PATH
|
|
|
|
SkFILEWStream outputStream(SK_PDF_TEST_TAGS_OUTPUT_PATH);
|
|
|
|
#else
|
|
|
|
SkDynamicMemoryWStream outputStream;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
SkSize pageSize = SkSize::Make(612, 792); // U.S. Letter
|
|
|
|
|
|
|
|
SkPDF::Metadata metadata;
|
|
|
|
metadata.fTitle = "Example Tagged PDF";
|
|
|
|
metadata.fCreator = "Skia";
|
|
|
|
SkTime::DateTime now;
|
|
|
|
SkTime::GetDateTime(&now);
|
|
|
|
metadata.fCreation = now;
|
|
|
|
metadata.fModified = now;
|
|
|
|
|
|
|
|
// The document tag.
|
|
|
|
PDFTag root;
|
|
|
|
root.fNodeId = 1;
|
|
|
|
root.fType = SkPDF::DocumentStructureType::kDocument;
|
|
|
|
root.fChildCount = 5;
|
|
|
|
PDFTag rootChildren[5];
|
|
|
|
root.fChildren = rootChildren;
|
|
|
|
|
|
|
|
// Heading.
|
|
|
|
PDFTag& h1 = rootChildren[0];
|
|
|
|
h1.fNodeId = 2;
|
|
|
|
h1.fType = SkPDF::DocumentStructureType::kH1;
|
|
|
|
h1.fChildCount = 0;
|
|
|
|
|
|
|
|
// Initial paragraph.
|
|
|
|
PDFTag& p = rootChildren[1];
|
|
|
|
p.fNodeId = 3;
|
|
|
|
p.fType = SkPDF::DocumentStructureType::kP;
|
|
|
|
p.fChildCount = 0;
|
|
|
|
|
|
|
|
// Hidden div. This is never referenced by marked content
|
|
|
|
// so it should not appear in the resulting PDF.
|
|
|
|
PDFTag& div = rootChildren[2];
|
|
|
|
div.fNodeId = 4;
|
|
|
|
div.fType = SkPDF::DocumentStructureType::kDiv;
|
|
|
|
div.fChildCount = 0;
|
|
|
|
|
|
|
|
// A bulleted list of two items.
|
|
|
|
PDFTag& l = rootChildren[3];
|
|
|
|
l.fNodeId = 5;
|
|
|
|
l.fType = SkPDF::DocumentStructureType::kL;
|
|
|
|
l.fChildCount = 4;
|
|
|
|
PDFTag listChildren[4];
|
|
|
|
l.fChildren = listChildren;
|
|
|
|
|
|
|
|
PDFTag& lm1 = listChildren[0];
|
|
|
|
lm1.fNodeId = 6;
|
|
|
|
lm1.fType = SkPDF::DocumentStructureType::kLbl;
|
|
|
|
lm1.fChildCount = 0;
|
|
|
|
PDFTag& li1 = listChildren[1];
|
|
|
|
li1.fNodeId = 7;
|
|
|
|
li1.fType = SkPDF::DocumentStructureType::kLI;
|
|
|
|
li1.fChildCount = 0;
|
|
|
|
|
|
|
|
PDFTag& lm2 = listChildren[2];
|
|
|
|
lm2.fNodeId = 8;
|
|
|
|
lm2.fType = SkPDF::DocumentStructureType::kLbl;
|
|
|
|
lm2.fChildCount = 0;
|
|
|
|
PDFTag& li2 = listChildren[3];
|
|
|
|
li2.fNodeId = 9;
|
|
|
|
li2.fType = SkPDF::DocumentStructureType::kLI;
|
|
|
|
li2.fChildCount = 0;
|
|
|
|
|
|
|
|
// Paragraph spanning two pages.
|
|
|
|
PDFTag& p2 = rootChildren[4];
|
|
|
|
p2.fNodeId = 10;
|
|
|
|
p2.fType = SkPDF::DocumentStructureType::kP;
|
|
|
|
p2.fChildCount = 0;
|
|
|
|
|
|
|
|
metadata.fStructureElementTreeRoot = &root;
|
|
|
|
sk_sp<SkDocument> document = SkPDF::MakeDocument(
|
|
|
|
&outputStream, metadata);
|
|
|
|
|
|
|
|
SkPaint paint;
|
|
|
|
paint.setColor(SK_ColorBLACK);
|
|
|
|
|
|
|
|
// First page.
|
|
|
|
SkCanvas* canvas =
|
|
|
|
document->beginPage(pageSize.width(),
|
|
|
|
pageSize.height());
|
|
|
|
SkPDF::SetNodeId(canvas, 2);
|
2019-01-08 18:01:58 +00:00
|
|
|
SkFont font(nullptr, 36);
|
2018-09-26 03:29:15 +00:00
|
|
|
const char* message = "This is the title";
|
|
|
|
canvas->translate(72, 72);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 3);
|
2019-01-08 18:01:58 +00:00
|
|
|
font.setSize(14);
|
2018-09-26 03:29:15 +00:00
|
|
|
message = "This is a simple paragraph.";
|
|
|
|
canvas->translate(0, 72);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 6);
|
2019-01-08 18:01:58 +00:00
|
|
|
font.setSize(14);
|
2018-09-26 03:29:15 +00:00
|
|
|
message = "*";
|
|
|
|
canvas->translate(0, 72);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 7);
|
|
|
|
message = "List item 1";
|
|
|
|
canvas->translate(36, 0);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 8);
|
|
|
|
message = "*";
|
|
|
|
canvas->translate(-36, 36);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 9);
|
|
|
|
message = "List item 2";
|
|
|
|
canvas->translate(36, 0);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
SkPDF::SetNodeId(canvas, 10);
|
|
|
|
message = "This is a paragraph that starts on one page";
|
|
|
|
canvas->translate(-36, 6 * 72);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
document->endPage();
|
|
|
|
|
|
|
|
// Second page.
|
|
|
|
canvas = document->beginPage(pageSize.width(),
|
|
|
|
pageSize.height());
|
|
|
|
SkPDF::SetNodeId(canvas, 10);
|
|
|
|
message = "and finishes on the second page.";
|
|
|
|
canvas->translate(72, 72);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
// This has a node ID but never shows up in the tag tree so it
|
|
|
|
// won't be tagged.
|
|
|
|
SkPDF::SetNodeId(canvas, 999);
|
|
|
|
message = "Page 2";
|
|
|
|
canvas->translate(468, -36);
|
2019-01-08 18:01:58 +00:00
|
|
|
canvas->drawString(message, 0, 0, font, paint);
|
2018-09-26 03:29:15 +00:00
|
|
|
|
|
|
|
document->endPage();
|
|
|
|
|
|
|
|
document->close();
|
|
|
|
|
|
|
|
outputStream.flush();
|
|
|
|
}
|