Add accessor for the PDF document producer

autotests/scriptenginedata/iata-bcbp-demo.pdf.json

@@ -22,6 +22,7 @@
                     "text": "              Akademy Airways\n              Boarding Pass\nFrom: Vienna International, Terminal 2\nTo: Milano Malpensa, Terminal 1\nFlight: AK 1996\nGate: A36\nBoarding Time: 15:20\nDeparture Time: 15:45\nArrival Time: 17:20\nPassenger: Dragon, Dr. Konqi\n"
                 }
             ],
+            "producer": "cairo 1.16.0 (https://cairographics.org)",
             "text": "              Akademy Airways\n              Boarding Pass\nFrom: Vienna International, Terminal 2\nTo: Milano Malpensa, Terminal 1\nFlight: AK 1996\nGate: A36\nBoarding Time: 15:20\nDeparture Time: 15:45\nArrival Time: 17:20\nPassenger: Dragon, Dr. Konqi\n"
         }
     },
@@ -83,6 +84,7 @@
                     "text": "              Akademy Airways\n              Boarding Pass\nFrom: Vienna International, Terminal 2\nTo: Milano Malpensa, Terminal 1\nFlight: AK 1996\nGate: A36\nBoarding Time: 15:20\nDeparture Time: 15:45\nArrival Time: 17:20\nPassenger: Dragon, Dr. Konqi\n"
                 }
             ],
+            "producer": "cairo 1.16.0 (https://cairographics.org)",
             "text": "              Akademy Airways\n              Boarding Pass\nFrom: Vienna International, Terminal 2\nTo: Milano Malpensa, Terminal 1\nFlight: AK 1996\nGate: A36\nBoarding Time: 15:20\nDeparture Time: 15:45\nArrival Time: 17:20\nPassenger: Dragon, Dr. Konqi\n"
         },
         "contextDateTime": "Mon Aug 19 20:23:28 2019 GMT+0200",

src/lib/pdf/pdfdocument.cpp

@@ -296,6 +296,15 @@ QDateTime PdfDocument::modificationTime() const
 #endif
 }
 
+QString PdfDocument::producer() const
+{
+    std::unique_ptr<GooString> s(d->m_popplerDoc->getDocInfoProducer());
+    if (!s) {
+        return {};
+    }
+    return QString::fromUtf8(s->c_str());
+}
+
 QVariantList PdfDocument::pagesVariant() const
 {
     QVariantList l;

src/lib/pdf/pdfdocument.h

@@ -92,6 +92,7 @@ class KITINERARY_EXPORT PdfDocument : public QObject
     Q_PROPERTY(QVariantList pages READ pagesVariant CONSTANT)
     Q_PROPERTY(QDateTime creationTime READ creationTime CONSTANT)
     Q_PROPERTY(QDateTime modificationTime READ modificationTime CONSTANT)
+    Q_PROPERTY(QString producer READ producer CONSTANT)
 
 public:
     explicit PdfDocument(QObject *parent = nullptr);
@@ -114,6 +115,9 @@ public:
     /** Modification time as specified in the PDF file. */
     QDateTime modificationTime() const;
 
+    /** The document producer. */
+    QString producer() const;
+
     /** Creates a PdfDocument from the given raw data.
      *  @returns @c nullptr if loading fails or Poppler was not found.
      */