feat: add right-click copy context menu to AI chat messages (#14722)

* feat: add right-click copy context menu to AI chat messages

* feat: add copy context menu and ChatMessage content utility

* refactor: use ClipBoardManager and specific exception handling for AI chat copy

* refactor: use @Inject and early returns for AI chat copy logic

* refactor: extract copy/selection logic into methods and align style

* docs: add explanation for error handling

* refactor: preserve AI chat selection using event filters and copySelectedText

* remove dead code and commented-out selection variables

* style: remove extra blank line in constructor

* add changelog entry for AI chat copy selection

* add changelog entry for AI chat copy selection

* replace static import with MouseEvent class import

---------

Co-authored-by: Carl Christian Snethlage <50491877+calixtus@users.noreply.github.com>

Author: pulkitbajaj

CHANGELOG.md

@@ -14,6 +14,7 @@ Note that this project **does not** adhere to [Semantic Versioning](https://semv
 - We fixed an issue where a redundant validation listener was causing duplicate error dialogs when invalid BibTeX source was detected in the SourceTab. [#14805](https://github.com/JabRef/jabref/issues/14805)
 - We added support for selecting citation fetcher in Citations Tab. [#14430](https://github.com/JabRef/jabref/issues/14430)
 - In the "New Entry" dialog the identifier type is now automatically updated on typing. [#14660](https://github.com/JabRef/jabref/issues/14660)
+- We added the ability to copy selected text from AI chat interface. [#14655](https://github.com/JabRef/jabref/issues/14655)
 - We added cover images for books, which will display in entry previews if available, and can be automatically downloaded when adding an entry via ISBN. [#10120](https://github.com/JabRef/jabref/issues/10120)
 - REST-API: Added more commands (`selectentries`, `open`, `focus`).
 - REST-API: Added the possibility to trigger the import dialog

jabgui/src/main/java/org/jabref/gui/ai/components/aichat/chatmessage/ChatMessageComponent.java

@@ -7,20 +7,26 @@
 import javafx.fxml.FXML;
 import javafx.geometry.NodeOrientation;
 import javafx.geometry.Pos;
+import javafx.scene.control.ContextMenu;
 import javafx.scene.control.Label;
+import javafx.scene.control.MenuItem;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Pane;
 import javafx.scene.layout.Priority;
 import javafx.scene.layout.VBox;
 
+import org.jabref.gui.clipboard.ClipBoardManager;
 import org.jabref.gui.util.MarkdownTextFlow;
+import org.jabref.logic.ai.util.ChatMessageUtils;
 import org.jabref.logic.ai.util.ErrorMessage;
 import org.jabref.logic.l10n.Localization;
 
 import com.airhacks.afterburner.views.ViewLoader;
 import dev.langchain4j.data.message.AiMessage;
 import dev.langchain4j.data.message.ChatMessage;
 import dev.langchain4j.data.message.UserMessage;
+import jakarta.inject.Inject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -37,6 +43,7 @@ public class ChatMessageComponent extends HBox {
     @FXML private VBox buttonsVBox;
 
     private final MarkdownTextFlow markdownTextFlow;
+    @Inject private ClipBoardManager clipBoardManager;
 
     public ChatMessageComponent() {
         ViewLoader.view(this)
@@ -53,6 +60,7 @@ public ChatMessageComponent() {
         markdownContentPane.getChildren().add(markdownTextFlow);
         markdownContentPane.minHeightProperty().bind(markdownTextFlow.heightProperty());
         markdownContentPane.prefHeightProperty().bind(markdownTextFlow.heightProperty());
+        setupContextMenu();
     }
 
     public ChatMessageComponent(ChatMessage chatMessage, Consumer<ChatMessageComponent> onDeleteCallback) {
@@ -61,6 +69,36 @@ public ChatMessageComponent(ChatMessage chatMessage, Consumer<ChatMessageCompone
         setOnDelete(onDeleteCallback);
     }
 
+    private void setupContextMenu() {
+        ContextMenu contextMenu = new ContextMenu();
+        MenuItem copyItem = new MenuItem(Localization.lang("Copy"));
+        contextMenu.getItems().add(copyItem);
+
+        // 1. Capture and LOCK the selection state
+        markdownContentPane.addEventFilter(MouseEvent.MOUSE_PRESSED, event -> {
+            if (event.isSecondaryButtonDown() && markdownTextFlow.isSelectionActive()) {
+                // Consume the event to prevent JavaFX from clearing the selection highlight
+                event.consume();
+                // Manually trigger the context menu since we consumed the event that usually triggers it
+                contextMenu.show(markdownContentPane, event.getScreenX(), event.getScreenY());
+            }
+        });
+
+        copyItem.setOnAction(_ -> {
+            if (markdownTextFlow.isSelectionActive()) {
+                markdownTextFlow.copySelectedText();
+            } else {
+                copyFullMessage();
+            }
+        });
+
+        markdownContentPane.setOnContextMenuRequested(event -> {
+            if (!markdownTextFlow.isSelectionActive()) {
+                contextMenu.show(markdownContentPane, event.getScreenX(), event.getScreenY());
+            }
+        });
+    }
+
     public void setChatMessage(ChatMessage chatMessage) {
         this.chatMessage.set(chatMessage);
     }
@@ -119,4 +157,12 @@ private void onDeleteClick() {
     private void setColor(String fillColor, String borderColor) {
         vBox.setStyle("-fx-background-color: " + fillColor + "; -fx-border-radius: 10; -fx-background-radius: 10; -fx-border-color: " + borderColor + "; -fx-border-width: 3;");
     }
+
+    private void copyFullMessage() {
+        ChatMessageUtils.getContent(chatMessage.get()).ifPresent(content -> {
+            if (!content.isEmpty()) {
+                clipBoardManager.setContent(content);
+            }
+        });
+    }
 }

jablib/src/main/java/org/jabref/logic/ai/util/ChatMessageUtils.java

@@ -0,0 +1,32 @@
+package org.jabref.logic.ai.util;
+
+import java.util.Optional;
+
+import dev.langchain4j.data.message.AiMessage;
+import dev.langchain4j.data.message.ChatMessage;
+import dev.langchain4j.data.message.UserMessage;
+
+public class ChatMessageUtils {
+
+    private ChatMessageUtils() {
+    }
+
+    public static Optional<String> getContent(ChatMessage chatMessage) {
+        if (chatMessage == null) {
+            return Optional.empty();
+        }
+
+        String content = switch (chatMessage) {
+            case UserMessage user ->
+                    user.singleText();
+            case AiMessage ai ->
+                    ai.text();
+            case ErrorMessage err ->
+                    err.getText();
+            default ->
+                    null;
+        };
+
+        return Optional.ofNullable(content);
+    }
+}