C++ Document::info方法代码示例

//TODO think about storing the documents instead of the filenames in a list
//Would avoid creation of the documents for each search but probably take up more memory
bool MainWindow::searchPDFPostResults(const QFileInfo &fi, QString searchString)
{
    bool nHitsExceeded = false;
    Poppler::Document *document = Poppler::Document::load(fi.absoluteFilePath());
    if (!document || document->isLocked()) {
      //Oops, document empty => error message
      QMessageBox mbox;
      mbox.setText(tr("Could not read the file \n'") + fi.fileName() +
                   tr("\ntherefore, possible matches might be missing"));
      mbox.exec();
      delete document;
      return false;
    }
    //Get document title
    QString title = document->info("Title");
    //If no title specified => use filename instead
    if(title == "")
        title = fi.fileName();
    QString shortTitle = QString(title);
    if (shortTitle.length() > 16)
    {
        shortTitle = "..." + shortTitle.right(16);
    }
    ui->statusBar->showMessage("Durchsuche PDF: " + shortTitle);
    qDebug() << "Searching pdf: " << title;
    //Search the document for the searchString
    int hitCounter = 0;
    for (int page = 0; page < document->numPages(); page++) {
        //Parameters 1,2,3,4 of the search function
        //will contain the rectangle coordinates of where the text was found.
        //Since we are not interested in these coordinates, we just pass a single variable
        double coordinate = 0.0;
        if (document->page(page)->search(searchString, coordinate,coordinate,coordinate,coordinate,
            Poppler::Page::NextResult,
            Poppler::Page::CaseInsensitive)) {
            hitCounter++;
            ui->statusBar->showMessage(tr("Searching in ") + shortTitle +
                                       " - hit on page: " + QString::number(page));
            //Yay, we found the search String on this page
            //=> Add this page to the result list
            addDocNPageToResultList(title, fi, page);
            // TODO make this limit a variable
            if(hitCounter >= maxHits)
            {
                QMessageBox mbox;
                mbox.setText(tr("Search has already reached the maximum of ") + QString::number(maxHits)
                             + tr(" hits please choose a more specific criterion"));
                mbox.exec();
                nHitsExceeded = true;
                break;
            }
        }
    }

    //Don't forget to delete the document
    delete document;
    //Return whether the max number of hits was reached
    return nHitsExceeded;
}

void TestMetaData::checkStrings2()
{
    Poppler::Document *doc;
    doc = Poppler::Document::load("../../../test/unittestcases/truetype.pdf");
    QVERIFY( doc );

    QFETCH( QString, key );
    QFETCH( QString, value );
    QCOMPARE( doc->info(key), value );

    delete doc;
}

int main( int argc, char **argv )
{
    QApplication a( argc, argv );               // QApplication required!

    QTime t;
    t.start();

    QDir directory( argv[1] );
    foreach ( const QString &fileName, directory.entryList() ) {
        if (fileName.endsWith("pdf") ) {
	    qDebug() << "Doing" << fileName.toLatin1().data() << ":";
	    Poppler::Document *doc = Poppler::Document::load( directory.canonicalPath()+"/"+fileName );
	    if (!doc) {
		qWarning() << "doc not loaded";
	    } else if ( doc->isLocked() ) {
	        if (! doc->unlock( "", "password" ) ) {
		    qWarning() << "couldn't unlock document";
		    delete doc;
		}
	    } else {
		doc->pdfVersion();
		doc->info("Title");
		doc->info("Subject");
		doc->info("Author");
		doc->info("Keywords");
		doc->info("Creator");
		doc->info("Producer");
		doc->date("CreationDate").toString();
		doc->date("ModDate").toString();
		doc->numPages();
		doc->isLinearized();
		doc->isEncrypted();
		doc->okToPrint();
		doc->okToCopy();
		doc->okToChange();
		doc->okToAddNotes();
		doc->pageMode();

		for( int index = 0; index < doc->numPages(); ++index ) {
		    Poppler::Page *page = doc->page( index );
		    QImage image = page->renderToImage();
		    page->pageSize();
		    page->orientation();
		    delete page;
		    std::cout << ".";
		    std::cout.flush();
		}
		std::cout << std::endl;
		delete doc;
	    }
	}
    }

    std::cout << "Elapsed time: " << (t.elapsed()/1000) << "seconds" << std::endl;

}

int main( int argc, char **argv )
{
    QApplication a( argc, argv );               // QApplication required!

    if ( argc != 3)
    {
	qWarning() << "usage: test-password-qt4 owner-password filename";
	exit(1);
    }
  
    Poppler::Document *doc = Poppler::Document::load(argv[2], argv[1]);
    if (!doc)
    {
	qWarning() << "doc not loaded";
	exit(1);
    }
  
    // output some meta-data
    int major = 0, minor = 0;
    doc->getPdfVersion( &major, &minor );
    qDebug() << "    PDF Version: " << qPrintable(QString::fromLatin1("%1.%2").arg(major).arg(minor));
    qDebug() << "          Title: " << doc->info("Title");
    qDebug() << "        Subject: " << doc->info("Subject");
    qDebug() << "         Author: " << doc->info("Author");
    qDebug() << "      Key words: " << doc->info("Keywords");
    qDebug() << "        Creator: " << doc->info("Creator");
    qDebug() << "       Producer: " << doc->info("Producer");
    qDebug() << "   Date created: " << doc->date("CreationDate").toString();
    qDebug() << "  Date modified: " << doc->date("ModDate").toString();
    qDebug() << "Number of pages: " << doc->numPages();
    qDebug() << "     Linearised: " << doc->isLinearized();
    qDebug() << "      Encrypted: " << doc->isEncrypted();
    qDebug() << "    OK to print: " << doc->okToPrint();
    qDebug() << "     OK to copy: " << doc->okToCopy();
    qDebug() << "   OK to change: " << doc->okToChange();
    qDebug() << "OK to add notes: " << doc->okToAddNotes();
    qDebug() << "      Page mode: " << doc->pageMode();
    QStringList fontNameList;
    foreach( const Poppler::FontInfo &font, doc->fonts() )
	fontNameList += font.name();
    qDebug() << "          Fonts: " << fontNameList.join( ", " );

    Poppler::Page *page = doc->page(0);
    qDebug() << "    Page 1 size: " << page->pageSize().width()/72 << "inches x " << page->pageSize().height()/72 << "inches";

    PDFDisplay test( doc );        // create picture display
    test.setWindowTitle("Poppler-Qt4 Test");
    test.show();                            // show it

    return a.exec();                        // start event loop
}

void PDFInfoDock::fillInfo()
{
	list->clear();
	Poppler::Document *doc = document->popplerDoc();
	QStringList keys = doc->infoKeys();
	QStringList dateKeys;
	dateKeys << "CreationDate";
	dateKeys << "ModDate";
	int i = 0;
	foreach (const QString &date, dateKeys) {
		const int id = keys.indexOf(date);
		if (id != -1) {
			list->addItem(date + ":");
			list->addItem(doc->date(date).toString(Qt::SystemLocaleDate));
			++i;
			keys.removeAt(id);
		}
	}
	foreach (const QString &key, keys) {
		list->addItem(key + ":");
		list->addItem(doc->info(key));
		++i;
	}

int main( int argc, char **argv )
{
    QApplication a( argc, argv );               // QApplication required!

    Q_UNUSED( argc );
    Q_UNUSED( argv );

    QTime t;
    t.start();
    QDir dbDir( QStringLiteral( "./pdfdb" ) );
    if ( !dbDir.exists() ) {
	qWarning() << "Database directory does not exist";
    }

    QStringList excludeSubDirs;
    excludeSubDirs << QStringLiteral("000048") << QStringLiteral("000607");

    const QStringList dirs = dbDir.entryList(QStringList() << QStringLiteral("0000*"), QDir::Dirs);
    foreach ( const QString &subdir, dirs ) {
	if ( excludeSubDirs.contains(subdir) ) {
	    // then skip it
	} else {
	    QString path = "./pdfdb/" + subdir + "/data.pdf";
	    std::cout <<"Doing " << path.toLatin1().data() << " :";
	    Poppler::Document *doc = Poppler::Document::load( path );
	    if (!doc) {
		qWarning() << "doc not loaded";
	    } else {
		int major = 0, minor = 0;
		doc->getPdfVersion( &major, &minor );
		doc->info(QStringLiteral("Title"));
		doc->info(QStringLiteral("Subject"));
		doc->info(QStringLiteral("Author"));
		doc->info(QStringLiteral("Keywords"));
		doc->info(QStringLiteral("Creator"));
		doc->info(QStringLiteral("Producer"));
		doc->date(QStringLiteral("CreationDate")).toString();
		doc->date(QStringLiteral("ModDate")).toString();
		doc->numPages();
		doc->isLinearized();
		doc->isEncrypted();
		doc->okToPrint();
		doc->okToCopy();
		doc->okToChange();
		doc->okToAddNotes();
		doc->pageMode();

		for( int index = 0; index < doc->numPages(); ++index ) {
		    Poppler::Page *page = doc->page( index );
		    page->renderToImage();
		    page->pageSize();
		    page->orientation();
		    delete page;
		    std::cout << ".";
		    std::cout.flush();
		}
		std::cout << std::endl;
		delete doc;
	    }
	}
    }

    std::cout << "Elapsed time: " << (t.elapsed()/1000) << std::endl;

}

void PdfViewer::loadDocument(const QString &file, PdfView::PositionHandling keepPosition)
{
//QTime t = QTime::currentTime();
#ifndef QT_NO_CURSOR
	QApplication::setOverrideCursor(Qt::WaitCursor);
#endif // QT_NO_CURSOR

	// TODO: close only when the new file fails to load
	const QString tempFileName = file; // we must copy file in a new variable because otherwise closeDocument() empties file if file == m_file (which is the case in slotReload())
	closeDocument();

	bool isLoaded = m_pdfView->load(tempFileName);
	if (!isLoaded) {
		QPointer<QMessageBox> msgBox = new QMessageBox(QMessageBox::Critical,
		    tr("Open Error"), tr("Cannot open:\n") + tempFileName,
		    QMessageBox::Ok, this);
		msgBox->exec();
		delete msgBox;
		m_fileOpenRecentAction->removeFile(tempFileName);
#ifndef QT_NO_CURSOR
		QApplication::restoreOverrideCursor();
#endif // QT_NO_CURSOR
		return;
	}

	Poppler::Document *doc = m_pdfView->document();
	while (doc->isLocked()) {
		bool ok = true;
		QString password = QInputDialog::getText(this, tr("Document Password"),
		                                         tr("Please insert the password of the document:"),
		                                         QLineEdit::Password, QString(), &ok);
		if (!ok) {
			m_pdfView->close();
			m_fileOpenRecentAction->removeFile(tempFileName);
#ifndef QT_NO_CURSOR
			QApplication::restoreOverrideCursor();
#endif // QT_NO_CURSOR
			return;
		}
		doc->unlock(password.toLatin1(), password.toLatin1());
	}

	m_file = QFileInfo(tempFileName).absoluteFilePath();

	m_fileOpenRecentAction->addFile(m_file);
	// remove previous file from m_watcher and add new file
	if (m_watcher)
	{
		const QStringList files = m_watcher->files();
		if (!files.isEmpty())
			m_watcher->removePaths(files);
		m_watcher->addPath(m_file);
	}

//qCritical() << t.msecsTo(QTime::currentTime());
    Q_FOREACH(DocumentObserver *obs, m_observers) {
		if (keepPosition == PdfView::DontKeepPosition)
			obs->documentLoaded();
        obs->pageChanged(m_currentPage, keepPosition);
//qCritical() << t.msecsTo(QTime::currentTime());
    }

	// set window title
	const QString docTitle = doc->info("Title");
	setWindowTitle((docTitle.isEmpty() ? QFileInfo(m_file).fileName() : docTitle)
	    + " - " + QCoreApplication::applicationName());

	// enable actions
    m_fileSaveCopyAction->setEnabled(true);
	m_findAction->setEnabled(true);
	m_findNextAction->setEnabled(true);
	m_findPreviousAction->setEnabled(true);
	m_showPresentationAction->setEnabled(true);

#ifndef QT_NO_CURSOR
	QApplication::restoreOverrideCursor();
#endif // QT_NO_CURSOR
//qCritical() << "close and load document" << t.msecsTo(QTime::currentTime());
}