test on linux

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

@@ -6,6 +6,7 @@ import javax.swing.*;
 import javax.swing.table.AbstractTableModel;
 import javax.swing.table.DefaultTableCellRenderer;
 import java.awt.*;
+import java.awt.datatransfer.StringSelection;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -166,6 +167,44 @@ public class FilePanelTab extends JPanel {
         fileTable = new JTable(tableModel) {
             @Override
             protected void processMouseEvent(java.awt.event.MouseEvent e) {
+                // Show system-like context menu on popup trigger (right-click) without
+                // changing default mouse-driven selection behavior.
+                try {
+                    if (e.isPopupTrigger()) {
+                        int col = columnAtPoint(e.getPoint());
+                        int row = rowAtPoint(e.getPoint());
+                        FileItem item = null;
+                        if (row >= 0) {
+                            if (viewMode == ViewMode.BRIEF) {
+                                item = tableModel.getItemFromBriefLayout(row, col);
+                                if (item != null) {
+                                    int index = tableModel.items.indexOf(item);
+                                    if (index >= 0) {
+                                        int selRow = index % tableModel.briefRowsPerColumn;
+                                        int selCol = index / tableModel.briefRowsPerColumn;
+                                        briefCurrentColumn = selCol;
+                                        // Select the logical row so actions apply to this item
+                                        fileTable.setRowSelectionInterval(selRow, selRow);
+                                    }
+                                }
+                            } else {
+                                item = tableModel.getItem(row);
+                                if (item != null) {
+                                    fileTable.setRowSelectionInterval(row, row);
+                                }
+                            }
+                        }
+
+                        if (item != null) {
+                            // Delegate to outer class to build and show the menu
+                            FilePanelTab.this.showContextMenuForItem(item, e.getPoint());
+                        }
+                        e.consume();
+                        return;
+                    }
+                } catch (Exception ex) {
+                    // best-effort: ignore exceptions here to avoid breaking mouse handling
+                }
                 // Intercept mouse events to prevent changing selection via mouse.
                 // Allow single-click to toggle marking of an item, allow BRIEF column
                 // tracking, and preserve double-click to open items. Dragging/presses
@@ -809,6 +848,129 @@ public class FilePanelTab extends JPanel {
         }
     }
 
+    /**
+     * Show a context popup menu for a specific file item at the given point (table coordinates).
+     */
+    private void showContextMenuForItem(FileItem item, Point tablePoint) {
+        if (item == null) return;
+
+        JPopupMenu menu = new JPopupMenu();
+
+        // Open
+        JMenuItem openItem = new JMenuItem("Open");
+        openItem.addActionListener(ae -> {
+            if (item.getName().equals("..")) return;
+            if (item.isDirectory()) {
+                loadDirectory(item.getFile());
+            } else {
+                try {
+                    if (Desktop.isDesktopSupported()) {
+                        Desktop.getDesktop().open(item.getFile());
+                    }
+                } catch (Exception ex) {
+                    try { JOptionPane.showMessageDialog(FilePanelTab.this, "Cannot open: " + ex.getMessage()); } catch (Exception ignore) {}
+                }
+            }
+        });
+        menu.add(openItem);
+
+        // Edit
+        JMenuItem editItem = new JMenuItem("Edit");
+        editItem.addActionListener(ae -> {
+            if (item.isDirectory() || item.getName().equals("..")) return;
+            try {
+                String ext = persistedConfig != null ? persistedConfig.getExternalEditorPath() : null;
+                if (ext != null && !ext.trim().isEmpty()) {
+                    java.util.List<String> cmd = new java.util.ArrayList<>();
+                    cmd.add(ext);
+                    cmd.add(item.getFile().getAbsolutePath());
+                    new ProcessBuilder(cmd).start();
+                } else if (Desktop.isDesktopSupported()) {
+                    Desktop.getDesktop().edit(item.getFile());
+                }
+            } catch (Exception ex) {
+                try { JOptionPane.showMessageDialog(FilePanelTab.this, "Cannot edit: " + ex.getMessage()); } catch (Exception ignore) {}
+            }
+        });
+        menu.add(editItem);
+
+        // Show in folder / Reveal
+        JMenuItem revealItem = new JMenuItem("Show in folder");
+        revealItem.addActionListener(ae -> {
+            try {
+                String os = System.getProperty("os.name").toLowerCase();
+                File f = item.getFile();
+                if (os.contains("win")) {
+                    new ProcessBuilder("explorer.exe", "/select,", f.getAbsolutePath()).start();
+                } else if (os.contains("mac")) {
+                    new ProcessBuilder("open", "-R", f.getAbsolutePath()).start();
+                } else {
+                    File parent = f.getParentFile();
+                    if (parent != null) new ProcessBuilder("xdg-open", parent.getAbsolutePath()).start();
+                }
+            } catch (Exception ex) {
+                try { JOptionPane.showMessageDialog(FilePanelTab.this, "Cannot reveal file: " + ex.getMessage()); } catch (Exception ignore) {}
+            }
+        });
+        menu.add(revealItem);
+
+        // Copy path
+        JMenuItem copyPath = new JMenuItem("Copy path");
+        copyPath.addActionListener(ae -> {
+            try {
+                StringSelection sel = new StringSelection(item.getFile().getAbsolutePath());
+                Toolkit.getDefaultToolkit().getSystemClipboard().setContents(sel, null);
+            } catch (Exception ex) {
+                try { JOptionPane.showMessageDialog(FilePanelTab.this, "Cannot copy path: " + ex.getMessage()); } catch (Exception ignore) {}
+            }
+        });
+        menu.add(copyPath);
+
+        // Delete
+        JMenuItem deleteItem = new JMenuItem("Delete");
+        deleteItem.addActionListener(ae -> {
+            int res = JOptionPane.showConfirmDialog(FilePanelTab.this,
+                    "Really delete '" + item.getName() + "'?",
+                    "Delete",
+                    JOptionPane.YES_NO_OPTION,
+                    JOptionPane.WARNING_MESSAGE);
+            if (res == JOptionPane.YES_OPTION) {
+                try {
+                    java.util.List<FileItem> toDelete = new java.util.ArrayList<>();
+                    toDelete.add(item);
+                    com.kfmanager.service.FileOperations.delete(toDelete, null);
+                    // reload current directory
+                    loadDirectory(getCurrentDirectory());
+                } catch (Exception ex) {
+                    try { JOptionPane.showMessageDialog(FilePanelTab.this, "Delete failed: " + ex.getMessage()); } catch (Exception ignore) {}
+                }
+            }
+        });
+        menu.add(deleteItem);
+
+        // Properties
+        JMenuItem props = new JMenuItem("Properties");
+        props.addActionListener(ae -> {
+            try {
+                File f = item.getFile();
+                String info = String.format("Name: %s\nPath: %s\nSize: %s\nModified: %s\nReadable: %b, Writable: %b, Executable: %b",
+                        f.getName(), f.getAbsolutePath(), item.isDirectory() ? "<DIR>" : formatSize(f.length()),
+                        new java.util.Date(f.lastModified()).toString(), f.canRead(), f.canWrite(), f.canExecute());
+                JOptionPane.showMessageDialog(FilePanelTab.this, info, "Properties", JOptionPane.INFORMATION_MESSAGE);
+            } catch (Exception ex) {
+                try { JOptionPane.showMessageDialog(FilePanelTab.this, "Cannot show properties: " + ex.getMessage()); } catch (Exception ignore) {}
+            }
+        });
+        menu.add(props);
+
+        // Show the popup at the click location
+        SwingUtilities.invokeLater(() -> {
+            try {
+                menu.show(fileTable, tablePoint.x, tablePoint.y);
+            } catch (Exception ignore) {}
+        });
+    }
+    
     public void navigateUp() {
         // If we're currently browsing an extracted archive root, navigate back to the
         // original archive's parent and select the archive file.
@@ -1065,10 +1227,10 @@ public class FilePanelTab extends JPanel {
                         isCurrentCell = isSelected;
                     }
 
+                    // Only show selection highlight when this table has keyboard focus.
+                    // If the table is not focused, do not highlight any row (show normal background).
                     if (isCurrentCell && table.hasFocus()) {
                         setBackground(selectionColor);
-                    } else if (isCurrentCell) {
-                        setBackground(selectionInactiveColor);
                     } else {
                         setBackground(FilePanelTab.this.getBackground());
                     }
@@ -1085,7 +1247,8 @@ public class FilePanelTab extends JPanel {
                     } else {
                         // Preserve whatever style the base font has (do not force plain)
                         setFont(baseFont.deriveFont(baseStyle));
-                        setForeground(Color.BLACK);
+                        // Use a light foreground color for better contrast on dark backgrounds
+                        setForeground(new Color(240, 240, 240));
                     }
                     
                     // Zobrazit ikonu pro názvy souborů