Fix PDF export of documents containing both PDFs and tools

In some cases, the PDF background of a document could be scaled badly
when tools such as the ruler, compass etc. were present on the page.

This happened with PDFs of version <= 1.4, and when the tools were
outside of / larger than the page.

src/adaptors/UBExportFullPDF.cpp

@@ -182,7 +182,7 @@ bool UBExportFullPDF::persistsDocument(UBDocumentProxy* pDocumentProxy, const QS
                 {
                     QString pdfName = UBPersistenceManager::objectDirectory + "/" + pdfItem->fileUuid().toString() + ".pdf";
                     QString backgroundPath = pDocumentProxy->persistencePath() + "/" + pdfName;
-                    QRectF annotationsRect = scene->itemsBoundingRect();
+                    QRectF annotationsRect = scene->annotationsBoundingRect();
 
                     // Original datas
                     double xAnnotation = qRound(annotationsRect.x());
@@ -192,8 +192,8 @@ bool UBExportFullPDF::persistsDocument(UBDocumentProxy* pDocumentProxy, const QS
                     double hPdf = qRound(pdfItem->sceneBoundingRect().height());
 
                     // Exportation-transformed datas
-                    double hScaleFactor = pageSize.width()/scene->itemsBoundingRect().width();
+                    double hScaleFactor = pageSize.width()/annotationsRect.width();
-                    double vScaleFactor = pageSize.height()/scene->itemsBoundingRect().height();
+                    double vScaleFactor = pageSize.height()/annotationsRect.height();
                     double scaleFactor = qMin(hScaleFactor, vScaleFactor);
 
                     double xAnnotationsOffset = 0;

src/domain/UBGraphicsScene.cpp

@@ -1811,6 +1811,21 @@ void UBGraphicsScene::deselectAllItemsExcept(QGraphicsItem* item)
     }
 }
 
+/**
+ * Return the bounding rectangle of all items on the page except for tools (ruler, compass,...)
+ */
+QRectF UBGraphicsScene::annotationsBoundingRect() const
+{
+    QRectF boundingRect;
+
+    foreach (QGraphicsItem *item, items()) {
+        if (!mTools.contains(rootItem(item)))
+            boundingRect |= item->sceneBoundingRect();
+    }
+
+    return boundingRect;
+}
+
 bool UBGraphicsScene::isEmpty() const
 {
     return mItemCount == 0;

src/domain/UBGraphicsScene.h

@@ -321,6 +321,8 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
         void notifyZChanged(QGraphicsItem *item, qreal zValue);
         void deselectAllItemsExcept(QGraphicsItem* graphicsItem);
 
+        QRectF annotationsBoundingRect() const;
+
 public slots:
         void updateSelectionFrame();
         void updateSelectionFrameWrapper(int);