added undo/redu, clipboard

src/main/java/com/kfmanager/ui/FileEditor.java

@@ -38,6 +38,7 @@ public class FileEditor extends JDialog {
     private JButton prevPageBtn = null;
     private JButton nextPageBtn = null;
     private JLabel pageOffsetLabel = null;
+    private javax.swing.undo.UndoManager undoManager;
     
     public FileEditor(Window parent, File file, AppConfig config, boolean readOnly) {
         super(parent, (readOnly ? "Prohlížeč - " : "Editor - ") + file.getName(), ModalityType.MODELESS);
@@ -72,11 +73,11 @@ public class FileEditor extends JDialog {
         textArea.setTabSize(4);
         textArea.setEditable(!readOnly);
         
-        // V read-only režimu zajistit viditelnost kurzoru a možnost označování
+        // Undo/Redo support
-        if (readOnly) {
+        undoManager = new javax.swing.undo.UndoManager();
-            textArea.getCaret().setVisible(true);
+        textArea.getDocument().addUndoableEditListener(e -> {
-            textArea.setCaretColor(Color.BLACK);
+            undoManager.addEdit(e.getEdit());
-        }
+        });
         
         // Sledování změn (pouze pro editovatelný režim)
         if (!readOnly) {
@@ -99,6 +100,12 @@ public class FileEditor extends JDialog {
         statusPanel.add(statusSelLabel, BorderLayout.EAST);
         add(statusPanel, BorderLayout.SOUTH);
         
+        // Apply appearance settings (colors, contrast caret etc)
+        applyAppearance();
+
+        // Kontextové menu pro clipboard
+        setupContextMenu();
+
         // Klávesové zkratky
         setupKeyBindings();
 
@@ -112,6 +119,109 @@ public class FileEditor extends JDialog {
         });
     }
     
+    private void setupContextMenu() {
+        JPopupMenu popup = new JPopupMenu();
+        
+        JMenuItem undoItem = new JMenuItem("Zpět");
+        undoItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK));
+        undoItem.addActionListener(e -> { if (undoManager.canUndo()) undoManager.undo(); });
+        
+        JMenuItem redoItem = new JMenuItem("Znovu");
+        redoItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK));
+        redoItem.addActionListener(e -> { if (undoManager.canRedo()) undoManager.redo(); });
+        
+        popup.add(undoItem);
+        popup.add(redoItem);
+        popup.addSeparator();
+
+        JMenuItem cutItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.CutAction());
+        cutItem.setText("Vyjmout");
+        cutItem.setMnemonic(KeyEvent.VK_X);
+        
+        JMenuItem copyItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.CopyAction());
+        copyItem.setText("Kopírovat");
+        copyItem.setMnemonic(KeyEvent.VK_C);
+        
+        JMenuItem pasteItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.PasteAction());
+        pasteItem.setText("Vložit");
+        pasteItem.setMnemonic(KeyEvent.VK_V);
+
+        popup.add(cutItem);
+        popup.add(copyItem);
+        popup.add(pasteItem);
+        popup.addSeparator();
+        
+        JMenuItem selectAllItem = new JMenuItem("Vybrat vše");
+        selectAllItem.setMnemonic(KeyEvent.VK_A);
+        selectAllItem.addActionListener(e -> textArea.selectAll());
+        popup.add(selectAllItem);
+
+        popup.addPopupMenuListener(new javax.swing.event.PopupMenuListener() {
+            @Override
+            public void popupMenuWillBecomeVisible(javax.swing.event.PopupMenuEvent e) {
+                boolean editable = textArea.isEditable();
+                undoItem.setEnabled(editable && undoManager.canUndo());
+                redoItem.setEnabled(editable && undoManager.canRedo());
+                cutItem.setEnabled(editable);
+                pasteItem.setEnabled(editable);
+            }
+            @Override public void popupMenuWillBecomeInvisible(javax.swing.event.PopupMenuEvent e) {}
+            @Override public void popupMenuCanceled(javax.swing.event.PopupMenuEvent e) {}
+        });
+
+        textArea.setComponentPopupMenu(popup);
+    }
+    
+    private void applyAppearance() {
+        Color bg = config.getBackgroundColor();
+        if (bg != null) {
+            boolean dark = isDark(bg);
+            // Apply to JTextArea
+            textArea.setBackground(bg);
+            textArea.setForeground(dark ? Color.WHITE : Color.BLACK);
+            textArea.setCaretColor(dark ? Color.WHITE : Color.BLACK);
+            
+            // Apply to the rest of the components recursively
+            applyRecursiveColors(getContentPane(), bg, dark);
+        } else {
+            // Default colors - make sure caret is at least visible
+            Color defaultBg = textArea.getBackground();
+            if (defaultBg != null) {
+                boolean dark = isDark(defaultBg);
+                textArea.setCaretColor(dark ? Color.WHITE : Color.BLACK);
+            } else {
+                textArea.setCaretColor(Color.BLACK);
+            }
+        }
+        
+        // Force caret visibility in read-only mode
+        if (readOnly) {
+            textArea.getCaret().setVisible(true);
+        }
+    }
+
+    private void applyRecursiveColors(Container container, Color bg, boolean dark) {
+        if (container == null) return;
+        container.setBackground(bg);
+        for (Component c : container.getComponents()) {
+            if (c instanceof JPanel || c instanceof JScrollPane || c instanceof JViewport) {
+                c.setBackground(bg);
+            }
+            if (c instanceof JLabel) {
+                c.setForeground(dark ? Color.WHITE : Color.BLACK);
+            }
+            if (c instanceof Container) {
+                applyRecursiveColors((Container) c, bg, dark);
+            }
+        }
+    }
+
+    private boolean isDark(Color c) {
+        if (c == null) return false;
+        double darkness = 1 - (0.299 * c.getRed() + 0.587 * c.getGreen() + 0.114 * c.getBlue()) / 255;
+        return darkness >= 0.5;
+    }
+
     private void createMenuBar() {
         JMenuBar menuBar = new JMenuBar();
         
@@ -136,6 +246,60 @@ public class FileEditor extends JDialog {
         
         menuBar.add(fileMenu);
         
+        // Menu Edit
+        JMenu editMenu = new JMenu("Edit");
+        editMenu.setMnemonic(java.awt.event.KeyEvent.VK_E);
+
+        JMenuItem undoItem = new JMenuItem("Zpět");
+        undoItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK));
+        undoItem.addActionListener(e -> { if (undoManager.canUndo()) undoManager.undo(); });
+        editMenu.add(undoItem);
+
+        JMenuItem redoItem = new JMenuItem("Znovu");
+        redoItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK));
+        redoItem.addActionListener(e -> { if (undoManager.canRedo()) undoManager.redo(); });
+        editMenu.add(redoItem);
+
+        editMenu.addSeparator();
+
+        JMenuItem cutItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.CutAction());
+        cutItem.setText("Vyjmout");
+        cutItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_DOWN_MASK));
+        editMenu.add(cutItem);
+
+        JMenuItem copyItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.CopyAction());
+        copyItem.setText("Kopírovat");
+        copyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_DOWN_MASK));
+        editMenu.add(copyItem);
+
+        JMenuItem pasteItem = new JMenuItem(new javax.swing.text.DefaultEditorKit.PasteAction());
+        pasteItem.setText("Vložit");
+        pasteItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_DOWN_MASK));
+        editMenu.add(pasteItem);
+
+        editMenu.addSeparator();
+
+        JMenuItem selectAllItem = new JMenuItem("Vybrat vše");
+        selectAllItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_DOWN_MASK));
+        selectAllItem.addActionListener(e -> textArea.selectAll());
+        editMenu.add(selectAllItem);
+
+        // Update menu items state when menu is selected
+        editMenu.addMenuListener(new javax.swing.event.MenuListener() {
+            @Override
+            public void menuSelected(javax.swing.event.MenuEvent e) {
+                boolean editable = textArea.isEditable();
+                undoItem.setEnabled(editable && undoManager.canUndo());
+                redoItem.setEnabled(editable && undoManager.canRedo());
+                cutItem.setEnabled(editable);
+                pasteItem.setEnabled(editable);
+            }
+            @Override public void menuDeselected(javax.swing.event.MenuEvent e) {}
+            @Override public void menuCanceled(javax.swing.event.MenuEvent e) {}
+        });
+
+        menuBar.add(editMenu);
+        
         // Menu Nastavení
         JMenu settingsMenu = new JMenu("Nastavení");
         settingsMenu.setMnemonic(java.awt.event.KeyEvent.VK_N);
@@ -215,6 +379,21 @@ public class FileEditor extends JDialog {
                 },
                 KeyStroke.getKeyStroke(KeyEvent.VK_PAGE_DOWN, 0),
                 JComponent.WHEN_IN_FOCUSED_WINDOW);
+        
+        // Ctrl+Z - Undo
+        rootPane.registerKeyboardAction(e -> {
+            if (undoManager.canUndo()) undoManager.undo();
+        }, KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK), JComponent.WHEN_IN_FOCUSED_WINDOW);
+        
+        // Ctrl+Y - Redo
+        rootPane.registerKeyboardAction(e -> {
+            if (undoManager.canRedo()) undoManager.redo();
+        }, KeyStroke.getKeyStroke(KeyEvent.VK_Y, InputEvent.CTRL_DOWN_MASK), JComponent.WHEN_IN_FOCUSED_WINDOW);
+
+        // Ctrl+Shift+Z - Redo (alternative shortcut)
+        rootPane.registerKeyboardAction(e -> {
+            if (undoManager.canRedo()) undoManager.redo();
+        }, KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK | InputEvent.SHIFT_DOWN_MASK), JComponent.WHEN_IN_FOCUSED_WINDOW);
     }
 
     private void setHexMode(boolean on) {
@@ -256,6 +435,7 @@ public class FileEditor extends JDialog {
             textArea.setEditable(!readOnly);
             textArea.setFont(config.getEditorFont());
         }
+        applyAppearance();
         updateStatus();
     }
 
@@ -442,6 +622,7 @@ public class FileEditor extends JDialog {
                     textArea.setCaretPosition(0);
                 }
             }
+            if (undoManager != null) undoManager.discardAllEdits();
             modified = false;
             updateTitle();
             updateStatus();