From 24798ae9ebada5d987e9648b69f03956a8d12f2a Mon Sep 17 00:00:00 2001
From: Radek Davidek <rdavidek@trask.cz>
Date: Tue, 31 Mar 2026 13:26:18 +0200
Subject: [PATCH] better memory

---
 .../cz/kamma/kfmanager/ui/FilePanelTab.java   | 23 +++++++++++++++----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java b/src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java
index fd81622..e6a1985 100644
--- a/src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java
+++ b/src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java
@@ -27,6 +27,7 @@ import java.util.Arrays;
 import java.util.Comparator;
 import java.util.Date;
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Locale;
@@ -41,6 +42,8 @@ import java.nio.file.attribute.DosFileAttributes;
  * Single tab in a panel - displays the contents of one directory
  */
 public class FilePanelTab extends JPanel {
+    private static final int MAX_ICON_CACHE_ENTRIES =
+            Integer.getInteger("kfmanager.iconCache.maxEntries", 128);
     
     private File currentDirectory;
     private JTable fileTable;
@@ -1348,6 +1351,7 @@ public class FilePanelTab extends JPanel {
             briefCurrentColumn = 0;
             lastValidRow = 0;
             lastValidBriefColumn = 0;
+            iconCache.clear();
         }
         
         List<FileItem> items = (preloadedItems != null) ? preloadedItems : createFileItemList(directory);
@@ -3141,7 +3145,12 @@ public class FilePanelTab extends JPanel {
             fileTable.getColumnModel().getColumn(i).setCellRenderer(renderer);
         }
     }
-    private final java.util.Map<String, Icon> iconCache = new java.util.HashMap<>();
+    private final Map<String, Icon> iconCache = new LinkedHashMap<>(128, 0.75f, true) {
+        @Override
+        protected boolean removeEldestEntry(Map.Entry<String, Icon> eldest) {
+            return size() > MAX_ICON_CACHE_ENTRIES;
+        }
+    };
     private final FileSystemView fileSystemView = FileSystemView.getFileSystemView();
 
     private Icon getItemIcon(FileItem item) {
@@ -3159,7 +3168,7 @@ public class FilePanelTab extends JPanel {
             FileSpecificIcon.Type fileType = FileSpecificIcon.getFileType(name);
             if (isExecutableWithEmbeddedIcon(item, fileType)) {
                 File file = item.getFile();
-                key = "FILE_EMBEDDED_" + file.getAbsolutePath() + "_" + file.lastModified();
+                key = "FILE_EMBEDDED_" + file.getAbsolutePath();
             } else {
                 key = "FILE_" + fileType;
             }
@@ -3217,16 +3226,20 @@ public class FilePanelTab extends JPanel {
             return icon;
         }
 
-        BufferedImage image = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
+        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
         Graphics2D g2 = image.createGraphics();
         try {
             g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
+            g2.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+            g2.scale(
+                    (double) width / Math.max(1, icon.getIconWidth()),
+                    (double) height / Math.max(1, icon.getIconHeight())
+            );
             icon.paintIcon(null, g2, 0, 0);
         } finally {
             g2.dispose();
         }
-        Image scaled = image.getScaledInstance(width, height, Image.SCALE_SMOOTH);
-        return new ImageIcon(scaled);
+        return new ImageIcon(image);
     }
 
     private int calculateCurrentColumnWidth() {