Refactored addition of bookmark item

Code duplication when adding items in the ReadingListBar. Prepares for next step which is including bookmarks of books that cannot be found in the library

src/readinglistbar.cpp

@@ -40,10 +40,10 @@ void ReadingListBar::setupList()
 {
     auto library = KiwixApp::instance()->getLibrary();
     auto bookmarks = library->getBookmarks();
-    auto listWidget = ui->listWidget;
-    listWidget->clear();
+    ui->listWidget->clear();
     for(auto& bookmark:bookmarks) {
         std::shared_ptr<zim::Archive> archive;
+        const QString& title = QString::fromStdString(bookmark.getTitle());
         try {
             archive = library->getArchive(QString::fromStdString(bookmark.getBookId()));
         } catch (std::out_of_range& e) {
@@ -56,16 +56,9 @@ void ReadingListBar::setupList()
             QPixmap pixmap;
             pixmap.loadFromData(reinterpret_cast<const uchar*>(content.data()), content.size());
             auto icon = QIcon(pixmap);
-            auto item = new QListWidgetItem(
-                icon,
-                QString::fromStdString(bookmark.getTitle()),
-                listWidget);
-            item->setTextAlignment(Qt::TextWordWrap);
+            addItem(title, icon);
         } catch (zim::EntryNotFound& e) {
-            auto item = new QListWidgetItem(
-                QString::fromStdString(bookmark.getTitle()),
-                listWidget);
-            item->setTextAlignment(Qt::TextWordWrap);
+            addItem(title);
         }
     }
 }
@@ -104,6 +97,12 @@ void ReadingListBar::onItemActivated(QListWidgetItem* item, Qt::MouseButtons but
     }
 }
 
+void ReadingListBar::addItem(const QString &title, const QIcon &icon)
+{
+    auto item = new QListWidgetItem(icon, title, ui->listWidget);
+    item->setTextAlignment(Qt::TextWordWrap);
+}
+
 void ReadingListBar::openUrl(QListWidgetItem* item, bool newTab)
 {
     int index = ui->listWidget->row(item);

src/readinglistbar.h

@@ -22,6 +22,7 @@ public slots:
     void onItemDoubleClicked(QListWidgetItem *item);
     void onItemPressed(QListWidgetItem* item, Qt::MouseButtons buttons);
     void onItemActivated(QListWidgetItem *item, Qt::MouseButtons buttons);
+    void addItem(const QString& title, const QIcon& icon = QIcon{});
 private:
     Ui::readinglistbar *ui;
     int clickKind;