From b2d4125ebc1bbec4ddf145a8d0f55982f80e6a87 Mon Sep 17 00:00:00 2001
From: Sanghyeok Kim <newcodes7@gmail.com>
Date: Sun, 27 Jul 2025 11:23:01 +0900
Subject: [PATCH 1/2] Add multiple bibtex dialog

---
 .../gui/importer/ImportEntriesDialog.java       | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesDialog.java b/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesDialog.java
index 4fc5a89000e..c57a50c10f2 100644
--- a/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesDialog.java
+++ b/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesDialog.java
@@ -188,14 +188,24 @@ private void initialize() {
 
     private void displayBibTeX(BibEntry entry, String bibTeX) {
         if (entriesListView.getCheckModel().isChecked(entry)) {
-            bibTeXData.clear();
             bibTeXData.appendText(bibTeX);
+            bibTeXData.appendText(OS.NEWLINE);
             bibTeXData.moveTo(0);
             bibTeXData.requestFollowCaret();
         } else {
+            String currentText = bibTeXData.getText();
+            String newText = currentText.replace(bibTeX, "");
             bibTeXData.clear();
+            bibTeXData.appendText(newText);
         }
     }
+    
+    private void displayBibTeXesWithoutCheck(String bibTeXes) {
+        bibTeXData.clear();
+        bibTeXData.appendText(bibTeXes);
+        bibTeXData.moveTo(0);
+        bibTeXData.requestFollowCaret();
+    }
 
     private void initBibTeX() {
         bibTeXDataLabel.setText(Localization.lang("%0 source", "BibTeX"));
@@ -209,6 +219,7 @@ private void initBibTeX() {
 
     public void unselectAll() {
         entriesListView.getCheckModel().clearChecks();
+        bibTeXData.clear();
     }
 
     public void selectAllNewEntries() {
@@ -216,7 +227,7 @@ public void selectAllNewEntries() {
         for (BibEntry entry : entriesListView.getItems()) {
             if (!viewModel.hasDuplicate(entry)) {
                 entriesListView.getCheckModel().check(entry);
-                displayBibTeX(entry, viewModel.getSourceString(entry));
+                displayBibTeX(entry, viewModel.getSourceString(entry, true));
             }
         }
     }
@@ -224,5 +235,7 @@ public void selectAllNewEntries() {
     public void selectAllEntries() {
         unselectAll();
         entriesListView.getCheckModel().checkAll();
+        List<BibEntry> entries = entriesListView.getItems();
+        displayBibTeXesWithoutCheck(viewModel.getSourcesString(entries));
     }
 }

From 0bbc7e95622e02fa4317e121262b4ead65fca899 Mon Sep 17 00:00:00 2001
From: Sanghyeok Kim <newcodes7@gmail.com>
Date: Sun, 27 Jul 2025 11:27:37 +0900
Subject: [PATCH 2/2] Add multiple bibtex format through serializeAll

---
 .../gui/importer/ImportEntriesViewModel.java    | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesViewModel.java b/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesViewModel.java
index 8dc031f249a..4392f6b1004 100644
--- a/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesViewModel.java
+++ b/jabgui/src/main/java/org/jabref/gui/importer/ImportEntriesViewModel.java
@@ -120,12 +120,25 @@ public boolean hasDuplicate(BibEntry entry) {
                 .containsDuplicate(selectedDb.getValue().getDatabase(), entry, selectedDb.getValue().getMode()).isPresent();
     }
 
-    public String getSourceString(BibEntry entry) {
+    public String getSourcesString(List<BibEntry> entries) {
         StringWriter writer = new StringWriter();
         BibWriter bibWriter = new BibWriter(writer, OS.NEWLINE);
         FieldWriter fieldWriter = FieldWriter.buildIgnoreHashes(preferences.getFieldPreferences());
+        String serializedStrings;
         try {
-            new BibEntryWriter(fieldWriter, entryTypesManager).write(entry, bibWriter, selectedDb.getValue().getMode());
+            serializedStrings = new BibEntryWriter(fieldWriter, entryTypesManager).serializeAll(entries, selectedDb.getValue().getMode());
+        } catch (IOException ioException) {
+            serializedStrings = "";
+        }
+        return serializedStrings;
+    }
+
+    public String getSourceString(BibEntry entry, boolean reformat) {
+        StringWriter writer = new StringWriter();
+        BibWriter bibWriter = new BibWriter(writer, OS.NEWLINE);
+        FieldWriter fieldWriter = FieldWriter.buildIgnoreHashes(preferences.getFieldPreferences());
+        try {
+            new BibEntryWriter(fieldWriter, entryTypesManager).write(entry, bibWriter, selectedDb.getValue().getMode(), reformat);
         } catch (IOException ioException) {
             return "";
         }