BibTeX information in web search import screen. (#560)

CHANGELOG.md

@@ -11,6 +11,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 
 ### Added
 
+- BibTeX information in web search import screen. [#560](https://github.com/koppor/jabref/issues/560)
 - We added a fetcher for [ISIDORE](https://isidore.science/), simply paste in the link into the text field or the last 6 digits in the link that identify that paper. [#10423](https://github.com/JabRef/jabref/issues/10423)
 - When importing entries form the "Citation relations" tab, the field [cites](https://docs.jabref.org/advanced/entryeditor/entrylinks) is now filled according to the relationship between the entries. [#10572](https://github.com/JabRef/jabref/pull/10752)
 

src/main/java/org/jabref/gui/importer/ImportEntriesDialog.fxml

@@ -3,7 +3,6 @@
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.control.ButtonType?>
 <?import javafx.scene.control.CheckBox?>
-<?import javafx.scene.control.ChoiceBox?>
 <?import javafx.scene.control.DialogPane?>
 <?import javafx.scene.control.Label?>
 <?import javafx.scene.layout.ColumnConstraints?>
@@ -13,6 +12,7 @@
 <?import javafx.scene.layout.VBox?>
 <?import org.controlsfx.control.CheckListView?>
 <?import javafx.scene.control.ComboBox?>
+<?import org.fxmisc.richtext.CodeArea?>
 <DialogPane prefHeight="700.0" prefWidth="1000.0" xmlns="http://javafx.com/javafx/10.0.2-internal"
             xmlns:fx="http://javafx.com/fxml/1" fx:controller="org.jabref.gui.importer.ImportEntriesDialog">
     <content>
@@ -26,6 +26,10 @@
                         <Button onAction="#selectAllEntries"  text="%Select all entries"/>
                         <Button onAction="#unselectAll"  text="%Unselect all"/>
                     </HBox>
+                    <VBox fx:id="bibTeXDataBox" visible="false" managed="false">
+                        <Label text="%Entry BibTeX data:"/>
+                        <CodeArea fx:id="bibTeXData" editable="false" minHeight="30.0" prefHeight="200.0" prefWidth="700.0" wrapText="true"/>
+                    </VBox>
                     <HBox spacing="4" alignment="CENTER_LEFT">
                         <Label text="%Library to import into"/>
                         <ComboBox fx:id="libraryListView" layoutX="16.0" layoutY="52.0"/>
@@ -48,7 +52,10 @@
                     <Label fx:id="selectedItems" GridPane.rowIndex="1" GridPane.columnIndex="1"/>
                 </GridPane>
             </HBox>
-            <CheckBox fx:id="downloadLinkedOnlineFiles" text="%Download linked online files"/>
+            <HBox spacing="4">
+                <CheckBox fx:id="downloadLinkedOnlineFiles" text="%Download linked online files"/>
+                <CheckBox fx:id="showEntryInformation" text="%Show entry information"/>
+            </HBox>
         </VBox>
     </content>
     <ButtonType fx:id="importButton" buttonData="OK_DONE" text="%Import entries"/>

src/main/java/org/jabref/gui/importer/ImportEntriesDialog.java

@@ -1,5 +1,7 @@
 package org.jabref.gui.importer;
 
+import java.io.IOException;
+import java.io.StringWriter;
 import java.util.EnumSet;
 import java.util.Optional;
 
@@ -9,6 +11,7 @@
 import javafx.beans.binding.BooleanBinding;
 import javafx.css.PseudoClass;
 import javafx.fxml.FXML;
+import javafx.geometry.Insets;
 import javafx.scene.Node;
 import javafx.scene.control.Button;
 import javafx.scene.control.ButtonType;
@@ -17,9 +20,15 @@
 import javafx.scene.control.Label;
 import javafx.scene.control.ToggleButton;
 import javafx.scene.control.Tooltip;
+import javafx.scene.layout.Border;
+import javafx.scene.layout.BorderStroke;
+import javafx.scene.layout.BorderStrokeStyle;
+import javafx.scene.layout.BorderWidths;
+import javafx.scene.layout.CornerRadii;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
 import javafx.scene.layout.VBox;
+import javafx.scene.paint.Color;
 import javafx.scene.text.Text;
 
 import org.jabref.gui.DialogService;
@@ -31,9 +40,13 @@
 import org.jabref.gui.util.TaskExecutor;
 import org.jabref.gui.util.TextFlowLimited;
 import org.jabref.gui.util.ViewModelListCellFactory;
+import org.jabref.logic.bibtex.BibEntryWriter;
+import org.jabref.logic.bibtex.FieldWriter;
+import org.jabref.logic.exporter.BibWriter;
 import org.jabref.logic.importer.ParserResult;
 import org.jabref.logic.l10n.Localization;
 import org.jabref.logic.shared.DatabaseLocation;
+import org.jabref.logic.util.OS;
 import org.jabref.logic.util.io.FileUtil;
 import org.jabref.model.database.BibDatabaseContext;
 import org.jabref.model.entry.BibEntry;
@@ -48,6 +61,7 @@
 import com.tobiasdiez.easybind.EasyBind;
 import jakarta.inject.Inject;
 import org.controlsfx.control.CheckListView;
+import org.fxmisc.richtext.CodeArea;
 
 public class ImportEntriesDialog extends BaseDialog<Boolean> {
 
@@ -57,7 +71,11 @@ public class ImportEntriesDialog extends BaseDialog<Boolean> {
     public Label totalItems;
     public Label selectedItems;
     public CheckBox downloadLinkedOnlineFiles;
+    public CheckBox showEntryInformation;
+    public CodeArea bibTeXData;
+    public VBox bibTeXDataBox;
     private final BackgroundTask<ParserResult> task;
+    private final BibDatabaseContext database;
     private ImportEntriesViewModel viewModel;
     @Inject private TaskExecutor taskExecutor;
     @Inject private DialogService dialogService;
@@ -66,7 +84,6 @@ public class ImportEntriesDialog extends BaseDialog<Boolean> {
     @Inject private StateManager stateManager;
     @Inject private BibEntryTypesManager entryTypesManager;
     @Inject private FileUpdateMonitor fileUpdateMonitor;
-    private final BibDatabaseContext database;
 
     /**
      * Imports the given entries into the given database. The entries are provided using the BackgroundTask
@@ -163,13 +180,50 @@ private void initialize() {
 
                     return container;
                 })
-                .withOnMouseClickedEvent((entry, event) -> entriesListView.getCheckModel().toggleCheckState(entry))
+                .withOnMouseClickedEvent((entry, event) -> {
+                    entriesListView.getCheckModel().toggleCheckState(entry);
+                    displayBibTeX(entry);
+                })
                 .withPseudoClass(entrySelected, entriesListView::getItemBooleanProperty)
                 .install(entriesListView);
 
         selectedItems.textProperty().bind(Bindings.size(entriesListView.getCheckModel().getCheckedItems()).asString());
         totalItems.textProperty().bind(Bindings.size(entriesListView.getItems()).asString());
         entriesListView.setSelectionModel(new NoSelectionModel<>());
+        initBibTeX();
+    }
+
+    private void displayBibTeX(BibEntry entry) {
+        if (entriesListView.getCheckModel().isChecked(entry)) {
+            bibTeXData.clear();
+            try {
+                bibTeXData.appendText(getSourceString(entry));
+                bibTeXData.moveTo(0);
+                bibTeXData.requestFollowCaret();
+            } catch (
+                    IOException aE) {
+                bibTeXData.clear();
+            }
+        } else {
+            bibTeXData.clear();
+        }
+    }
+
+    private void initBibTeX() {
+        bibTeXData.setBorder(new Border(new BorderStroke(Color.GREY, BorderStrokeStyle.SOLID, CornerRadii.EMPTY, BorderWidths.DEFAULT)));
+        bibTeXData.setPadding(new Insets(5.0));
+        showEntryInformation.selectedProperty().addListener((observableValue, old_val, new_val) -> {
+            bibTeXDataBox.setVisible(new_val);
+            bibTeXDataBox.setManaged(new_val);
+        });
+    }
+
+    private String getSourceString(BibEntry entry) throws IOException {
+        StringWriter writer = new StringWriter();
+        BibWriter bibWriter = new BibWriter(writer, OS.NEWLINE);
+        FieldWriter fieldWriter = FieldWriter.buildIgnoreHashes(preferences.getFieldPreferences());
+        new BibEntryWriter(fieldWriter, entryTypesManager).write(entry, bibWriter, database.getMode());
+        return writer.toString();
     }
 
     private Node getEntryNode(BibEntry entry) {

src/main/resources/l10n/JabRef_en.properties

@@ -1986,6 +1986,8 @@ Total\ items\ found\:=Total items found:
 Selected\ items\:=Selected items:
 Download\ linked\ online\ files=Download linked online files
 Select\ the\ entries\ to\ be\ imported\:=Select the entries to be imported\:
+Entry\ BibTeX\ data\:=Entry BibTeX data\:
+Show\ entry\ information=Show entry information
 Add\ new\ String=Add new String
 Must\ not\ be\ empty\!=Must not be empty\!
 Open\ Help\ page=Open Help page