KFileMetaData

popplerextractor.cpp
1/*
2 SPDX-FileCopyrightText: 2012 Vishesh Handa <me@vhanda.in>
3 SPDX-FileCopyrightText: 2012 Jörg Ehrichs <joerg.ehrichs@gmx.de>
4
5 SPDX-License-Identifier: LGPL-2.1-or-later
6*/
7
8
9#include "popplerextractor.h"
10
11#include <QScopedPointer>
12#include <QDebug>
13#include <QDateTime>
14
15using namespace KFileMetaData;
16
17PopplerExtractor::PopplerExtractor(QObject* parent)
18 : ExtractorPlugin(parent)
19{
20
21}
22
23const QStringList supportedMimeTypes = {
24 QStringLiteral("application/pdf"),
25};
26
27QStringList PopplerExtractor::mimetypes() const
28{
29 return supportedMimeTypes;
30}
31
32void PopplerExtractor::extract(ExtractionResult* result)
33{
34 const QString fileUrl = result->inputUrl();
35 std::unique_ptr<Poppler::Document> pdfDoc(Poppler::Document::load(fileUrl, QByteArray(), QByteArray()));
36
37 if (!pdfDoc || pdfDoc->isLocked()) {
38 return;
39 }
40
41 result->addType(Type::Document);
42
43 if (result->inputFlags() & ExtractionResult::ExtractMetaData) {
44 const QString title = pdfDoc->title();
45 if (!title.isEmpty()) {
46 result->add(Property::Title, title);
47 }
48
49 const QString subject = pdfDoc->subject();
50 if (!subject.isEmpty()) {
51 result->add(Property::Subject, subject);
52 }
53
54 const QString author = pdfDoc->author();
55 if (!author.isEmpty()) {
56 result->add(Property::Author, author);
57 }
58
59 const QString generator = pdfDoc->producer();
60 if (!generator.isEmpty()) {
61 result->add(Property::Generator, generator);
62 }
63
64 const QDateTime creationDate = pdfDoc->creationDate();
65 if (!creationDate.isNull()) {
66 result->add(Property::CreationDate, creationDate);
67 }
68
69 const int numPages = pdfDoc->numPages();
70 if (numPages > 0) {
71 result->add(Property::PageCount, numPages);
72 }
73 }
74
75 if (!(result->inputFlags() & ExtractionResult::ExtractPlainText)) {
76 return;
77 }
78
79 for (int i = 0; i < pdfDoc->numPages(); i++) {
80 std::unique_ptr<Poppler::Page> page(pdfDoc->page(i));
81 if (!page) { // broken pdf files do not return a valid page
82 qWarning() << "Could not read page content from" << fileUrl;
83 break;
84 }
85 result->append(page->text(QRectF()));
86 }
87}
88
89#include "moc_popplerextractor.cpp"
The ExtractionResult class is where all the data extracted by the indexer is saved.
QString inputUrl() const
The input url which the plugins will use to locate the file.
virtual void addType(Type::Type type)=0
This function is called by the plugins.
virtual void add(Property::Property property, const QVariant &value)=0
This function is called by the plugins when they wish to add a key value pair which should be indexed...
Flags inputFlags() const
The flags which the extraction plugin should considering following when extracting metadata from the ...
virtual void append(const QString &text)=0
This function is called by plugins when they wish for some plain text to be indexed without any prope...
The ExtractorPlugin is the base class for all file metadata extractors.
bool isNull() const const
bool isEmpty() const const
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