3 files changed, 53 insertions, 24 deletions

diff --git a/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/EditorPanel.java b/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/EditorPanel.java
index 92d1bd7f..377f63c6 100644
--- a/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/EditorPanel.java
+++ b/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/EditorPanel.java
@@ -1,11 +1,13 @@
 package cuchaz.enigma.gui.panels;
 
+import java.awt.AWTKeyStroke;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Font;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.GridLayout;
+import java.awt.KeyboardFocusManager;
 import java.awt.Rectangle;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -16,8 +18,11 @@ import java.awt.event.MouseEvent;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Comparator;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.NavigableSet;
+import java.util.Set;
 
 import javax.swing.JButton;
 import javax.swing.JComponent;
@@ -120,6 +125,11 @@ public class EditorPanel {
                 customizeEditor(this.editor);
                 this.editor.addCaretListener(event -> onCaretMove(event.getDot(), this.mouseIsPressed));
 
+                // Remove the tab key from focus traversal keys (we give it a different meaning)
+                Set<AWTKeyStroke> focusTraversalKeys = new HashSet<>(this.editor.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));
+                focusTraversalKeys.removeIf(key -> key.getKeyCode() == KeyEvent.VK_TAB);
+                this.editor.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, focusTraversalKeys);
+
                 // set unit increment to height of one line, the amount scrolled per
                 // mouse wheel rotation is then controlled by OS settings
                 this.editorScrollPane.getVerticalScrollBar().setUnitIncrement(this.editor.getFontMetrics(this.editor.getFont()).getHeight());
@@ -199,6 +209,9 @@ public class EditorPanel {
                                                 EditorPanel.this.shouldNavigateOnClick = true; // CTRL
                                                 break;
                                         }
+                                } else if (event.getKeyCode() == KeyEvent.VK_TAB) {
+                                        EditorPanel.this.navigateToNextObfuscatedToken();
+                                        event.consume();
                                 }
                         }
 
@@ -668,6 +681,36 @@ public class EditorPanel {
                 }
         }
 
+        /**
+         * Navigate to the next obfuscated token that can be renamed.
+         *
+         * <p>If the tokens are damaged, then this method should not be called
+         * synchronously. Instead, the call should be wrapped in a
+         * {@link SwingUtilities#invokeLater(Runnable)}. Failing to do so
+         * will induce invalid token highlighting regions.
+         */
+        public void navigateToNextObfuscatedToken() {
+                int caretPos = this.getEditor().getCaretPosition();
+                Token token = this.getToken(this.getEditor().getCaretPosition());
+                NavigableSet<Token> obfuscatedTokens = this.getSource().getTokenStore().getByType().get(RenamableTokenType.OBFUSCATED);
+                Token next;
+
+                if (token == null) {
+                        next = obfuscatedTokens.higher(new Token(caretPos, caretPos, null));
+                } else {
+                        next = obfuscatedTokens.higher(token);
+                }
+
+                if (next == null) {
+                        // Wrap to start of document
+                        next = obfuscatedTokens.pollFirst();
+                }
+
+                if (next != null) {
+                        this.navigateToToken(next);
+                }
+        }
+
         public void navigateToToken(Token token) {
                 if (token == null) {
                         throw new IllegalArgumentException("Token cannot be null!");
diff --git a/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/IdentifierPanel.java b/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/IdentifierPanel.java
index 6a8d7347..cf336e00 100644
--- a/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/IdentifierPanel.java
+++ b/enigma-swing/src/main/java/cuchaz/enigma/gui/panels/IdentifierPanel.java
@@ -23,8 +23,6 @@ import cuchaz.enigma.gui.events.ConvertingTextFieldListener;
 import cuchaz.enigma.gui.util.GridBagConstraintsBuilder;
 import cuchaz.enigma.gui.util.GuiUtil;
 import cuchaz.enigma.gui.util.ScaleUtil;
-import cuchaz.enigma.source.RenamableTokenType;
-import cuchaz.enigma.source.Token;
 import cuchaz.enigma.translation.mapping.AccessModifier;
 import cuchaz.enigma.translation.mapping.EntryChange;
 import cuchaz.enigma.translation.mapping.EntryMapping;
@@ -197,36 +195,19 @@ public class IdentifierPanel {
 
                                 @Override
                                 public void onStopEditing(ConvertingTextField field, StopEditingCause cause) {
+                                        EditorPanel e = gui.getActiveEditor();
+
                                         if (cause != StopEditingCause.ABORT) {
                                                 vc.reset();
                                                 vc.setActiveElement(field);
                                                 doRename(field.getText());
 
-                                                if (cause == StopEditingCause.TAB) {
-                                                        EditorPanel editor = gui.getActiveEditor();
-
-                                                        if (editor == null) {
-                                                                return;
-                                                        }
-
-                                                        Token token = editor.getToken(editor.getEditor().getCaretPosition());
-
-                                                        SwingUtilities.invokeLater(() -> {
-                                                                Token next = editor.getSource().getTokenStore().getByType().get(RenamableTokenType.OBFUSCATED).higher(token);
-
-                                                                if (next == null) {
-                                                                        editor.getEditor().requestFocusInWindow();
-                                                                } else {
-                                                                        editor.navigateToToken(next);
-                                                                }
-                                                        });
-
-                                                        return;
+                                                if (cause == StopEditingCause.TAB && e != null) {
+                                                        // invokeLater as per the method's javadocs
+                                                        SwingUtilities.invokeLater(e::navigateToNextObfuscatedToken);
                                                 }
                                         }
 
-                                        EditorPanel e = gui.getActiveEditor();
-
                                         if (e != null) {
                                                 e.getEditor().requestFocusInWindow();
                                         }
diff --git a/enigma/src/main/java/cuchaz/enigma/utils/I18n.java b/enigma/src/main/java/cuchaz/enigma/utils/I18n.java
index 4648decc..3c8c2383 100644
--- a/enigma/src/main/java/cuchaz/enigma/utils/I18n.java
+++ b/enigma/src/main/java/cuchaz/enigma/utils/I18n.java
@@ -101,6 +101,11 @@ public class I18n {
                         List<String> availableTranslations;
 
                         try (InputStream is = cl.getResourceAsStream("lang/index.txt")) {
+                                if (is == null) {
+                                        // This scenario should only really happen when launching from an IDE that does not run the necessary gradle tasks
+                                        throw new IOException("Resource 'lang/index.txt' not found");
+                                }
+
                                 availableTranslations = Arrays.asList(
                                                 new String(is.readAllBytes(), StandardCharsets.UTF_8)
                                                                 .split("\n")