Displays bookmarks of zims that have ther files missing

The bookmarks will still be displayed whether or not their file is still in the library. Helps inform the user what happend to their bookmarks.

src/readinglistbar.cpp

@@ -41,12 +41,16 @@ void ReadingListBar::setupList()
     auto library = KiwixApp::instance()->getLibrary();
     auto bookmarks = library->getBookmarks();
     ui->listWidget->clear();
-    for(auto& bookmark:bookmarks) {
+    for(unsigned i = 0; i < bookmarks.size(); i++) {
+        auto& bookmark = bookmarks[i];
         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) {
+            /* There can be bookmarks whose information is lost. */
+            if (!bookmark.getBookId().empty())
+                addItem(title, i);
             continue;
         }
         try {
@@ -56,9 +60,9 @@ void ReadingListBar::setupList()
             QPixmap pixmap;
             pixmap.loadFromData(reinterpret_cast<const uchar*>(content.data()), content.size());
             auto icon = QIcon(pixmap);
-            addItem(title, icon);
+            addItem(title, i, icon);
         } catch (zim::EntryNotFound& e) {
-            addItem(title);
+            addItem(title, i);
         }
     }
 }
@@ -97,16 +101,17 @@ void ReadingListBar::onItemActivated(QListWidgetItem* item, Qt::MouseButtons but
     }
 }
 
-void ReadingListBar::addItem(const QString &title, const QIcon &icon)
+void ReadingListBar::addItem(const QString &title, unsigned idx, const QIcon &icon)
 {
     auto item = new QListWidgetItem(icon, title, ui->listWidget);
     item->setTextAlignment(Qt::TextWordWrap);
+    item->setData(Qt::UserRole, idx);
 }
 
 void ReadingListBar::openUrl(QListWidgetItem* item, bool newTab)
 {
-    int index = ui->listWidget->row(item);
-    auto bookmark = KiwixApp::instance()->getLibrary()->getBookmarks(true).at(index);
+    int index = item->data(Qt::UserRole).toUInt();
+    auto bookmark = KiwixApp::instance()->getLibrary()->getBookmarks(false).at(index);
     QUrl url;
     url.setScheme("zim");
     url.setHost(QString::fromStdString(bookmark.getBookId())+".zim");

src/readinglistbar.h

@@ -22,7 +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{});
+    void addItem(const QString& title, unsigned idx, const QIcon& icon = QIcon{});
 private:
     Ui::readinglistbar *ui;
     int clickKind;