Found entries will be shown when dropping a pdf with xmp meta data

CHANGELOG.md

@@ -59,6 +59,7 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 - Improve language quality of the German translation of shared database
 - Change "Recent files" to "Recent databases" to keep the file menu consistent
 - Customized importer files need to be slightly changed since the class `ImportFormat` was renamed to `Importer`
+- [koppor#5](https://github.com/koppor/jabref/issues/5) When entries are found while dropping a pdf with xmp meta data the found entries will be displayed in the import dialog
 
 ### Fixed
 - Fixed [#2092](https://github.com/JabRef/jabref/issues/2092): "None"-button in date picker clears the date field

src/main/java/net/sf/jabref/gui/externalfiles/DroppedFileHandler.java

@@ -1,17 +1,20 @@
 package net.sf.jabref.gui.externalfiles;
 
+import java.awt.BorderLayout;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Paths;
 import java.util.List;
 import java.util.Optional;
 
+import javax.swing.BoxLayout;
 import javax.swing.ButtonGroup;
 import javax.swing.JCheckBox;
 import javax.swing.JLabel;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JRadioButton;
+import javax.swing.JTextArea;
 import javax.swing.JTextField;
 import javax.swing.event.ChangeEvent;
 import javax.swing.event.ChangeListener;
@@ -239,8 +242,19 @@ private boolean tryXmpImport(String fileName, ExternalFileType fileType, NamedCo
                 Localization.lang("The PDF contains one or several BibTeX-records.")
                         + "\n"
                         + Localization.lang("Do you want to import these as new entries into the current database?"));
-
-        int reply = JOptionPane.showConfirmDialog(frame, confirmationMessage,
+        JPanel entriesPanel = new JPanel();
+        entriesPanel.setLayout(new BoxLayout(entriesPanel, BoxLayout.Y_AXIS));
+        xmpEntriesInFile.forEach(entry -> {
+            JTextArea entryArea = new JTextArea(entry.toString());
+            entryArea.setEditable(false);
+            entriesPanel.add(entryArea);
+        });
+
+        JPanel contentPanel = new JPanel(new BorderLayout());
+        contentPanel.add(confirmationMessage, BorderLayout.NORTH);
+        contentPanel.add(entriesPanel, BorderLayout.CENTER);
+
+        int reply = JOptionPane.showConfirmDialog(frame, contentPanel,
                 Localization.lang("XMP-metadata found in PDF: %0", fileName), JOptionPane.YES_NO_CANCEL_OPTION,
                 JOptionPane.QUESTION_MESSAGE);
 

src/main/java/net/sf/jabref/pdfimport/ImportDialog.java

@@ -8,8 +8,12 @@
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 import javax.swing.BorderFactory;
+import javax.swing.BoxLayout;
 import javax.swing.ButtonGroup;
 import javax.swing.JButton;
 import javax.swing.JCheckBox;
@@ -19,11 +23,14 @@
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JRadioButton;
+import javax.swing.JTextArea;
 import javax.swing.KeyStroke;
 import javax.swing.WindowConstants;
 
 import net.sf.jabref.Globals;
 import net.sf.jabref.logic.l10n.Localization;
+import net.sf.jabref.logic.xmp.XMPUtil;
+import net.sf.jabref.model.entry.BibEntry;
 import net.sf.jabref.model.strings.StringUtil;
 import net.sf.jabref.preferences.JabRefPreferences;
 
@@ -80,6 +87,15 @@ public ImportDialog(boolean targetIsARow, String fileName) {
         checkBoxDoNotShowAgain = new JCheckBox(Localization.lang("Do not show this box again for this import"));
         useDefaultPDFImportStyle = new JCheckBox(Localization.lang("Always use this PDF import style (and do not ask for each import)"));
         DefaultFormBuilder b = new DefaultFormBuilder(new FormLayout("left:pref, 5dlu, left:pref:grow", ""));
+        List<BibEntry> foundEntries = getEntriesFromXMP(fileName);
+        JPanel entriesPanel = new JPanel();
+        entriesPanel.setLayout(new BoxLayout(entriesPanel, BoxLayout.Y_AXIS));
+        foundEntries.forEach(entry -> {
+            JTextArea entryArea = new JTextArea(entry.toString());
+            entryArea.setEditable(false);
+            entriesPanel.add(entryArea);
+        });
+
         b.appendSeparator(Localization.lang("Create new entry"));
         b.append(radioButtonNoMeta, 3);
         b.append(radioButtonXmp, 3);
@@ -89,6 +105,10 @@ public ImportDialog(boolean targetIsARow, String fileName) {
         b.nextLine();
         b.append(checkBoxDoNotShowAgain);
         b.append(useDefaultPDFImportStyle);
+        if (!foundEntries.isEmpty()) {
+            b.appendSeparator(Localization.lang("XMP-metadata"));
+            b.append(entriesPanel, 3);
+        }
         b.getPanel().setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
         ButtonBarBuilder bb = new ButtonBarBuilder();
         bb.addGlue();
@@ -155,6 +175,16 @@ public void windowClosing(WindowEvent e) {
         this.setSize(555, 371);
     }
 
+    private List<BibEntry> getEntriesFromXMP(String fileName) {
+        List<BibEntry> foundEntries = new ArrayList<>();
+        try {
+            foundEntries =  XMPUtil.readXMP(fileName, Globals.prefs.getXMPPreferences());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return foundEntries;
+    }
+
     private void onOK() {
         this.result = JOptionPane.OK_OPTION;
         Globals.prefs.putInt(JabRefPreferences.IMPORT_DEFAULT_PDF_IMPORT_STYLE, this.getChoice());