Added icons for text/image MIME types.

core/src/main/java/com/github/weisj/darklaf/ui/filechooser/DarkFileChooserUI.java

@@ -34,25 +34,49 @@ import javax.swing.*;
 import javax.swing.border.EmptyBorder;
 import javax.swing.event.ListDataEvent;
 import javax.swing.event.ListDataListener;
+import javax.swing.filechooser.FileSystemView;
+import javax.swing.filechooser.FileView;
 import javax.swing.plaf.ComponentUI;
 import java.awt.*;
 import java.awt.event.FocusAdapter;
 import java.awt.event.FocusEvent;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
 
 public class DarkFileChooserUI extends DarkFileChooserUIBridge {
 
     public static final String KEY_VIEW_TYPE = "viewType";
+    private static final String MIME_TEXT = "text/";
+    private static final String MIME_IMAGE = "image/";
 
     public DarkFileChooserUI(final JFileChooser b) {
         super(b);
     }
 
     protected AlignedLabel filesOfTypeLabel;
+    protected BasicFileView fileView;
+    protected Icon textFileIcon;
+    protected Icon imageFileIcon;
 
     public static ComponentUI createUI(final JComponent c) {
         return new DarkFileChooserUI((JFileChooser) c);
     }
 
+    @Override
+    protected void installIcons(final JFileChooser fc) {
+        super.installIcons(fc);
+        textFileIcon = UIManager.getIcon("FileView.textFileIcon");
+        imageFileIcon = UIManager.getIcon("FileView.imageFileIcon");
+    }
+
+    @Override
+    protected void uninstallIcons(final JFileChooser fc) {
+        super.uninstallIcons(fc);
+        textFileIcon = null;
+        imageFileIcon = null;
+    }
+
     @Override
     public void installComponents(final JFileChooser fc) {
         fc.setBorder(new EmptyBorder(10, 10, 7, 10));
@@ -338,4 +362,60 @@ public class DarkFileChooserUI extends DarkFileChooserUIBridge {
             topMargin = 5;
         }
     }
+
+    public void clearIconCache() {
+        getFileView().clearIconCache();
+    }
+
+    public BasicFileView getFileView() {
+        if (fileView == null) fileView = createFileView();
+        return fileView;
+    }
+
+    @Override
+    public FileView getFileView(final JFileChooser fc) {
+        return getFileView();
+    }
+
+    protected BasicFileView createFileView() {
+        return new DarkFileView();
+    }
+
+    protected class DarkFileView extends BasicFileView {
+
+        public Icon getIcon(final File f) {
+            Icon icon = getCachedIcon(f);
+            if (icon != null) {
+                return icon;
+            }
+            icon = fileIcon;
+            if (f != null) {
+                FileSystemView fsv = getFileChooser().getFileSystemView();
+
+                if (fsv.isFloppyDrive(f)) {
+                    icon = floppyDriveIcon;
+                } else if (fsv.isDrive(f)) {
+                    icon = hardDriveIcon;
+                } else if (fsv.isComputerNode(f)) {
+                    icon = computerIcon;
+                } else if (f.isDirectory()) {
+                    icon = directoryIcon;
+                } else {
+                    try {
+                        String mimeType = Files.probeContentType(f.toPath());
+                        if (mimeType == null) mimeType = "";
+                        if (mimeType.startsWith(MIME_IMAGE)) {
+                            icon = imageFileIcon;
+                        } else if (mimeType.startsWith(MIME_TEXT)) {
+                            icon = textFileIcon;
+                        }
+                    } catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+            cacheIcon(f, icon);
+            return icon;
+        }
+    }
 }

core/src/main/java/com/github/weisj/darklaf/ui/filechooser/DarkFilePane.java

@@ -47,7 +47,6 @@ import java.util.function.Supplier;
 
 public class DarkFilePane extends DarkFilePaneUIBridge {
 
-
     public DarkFilePane(final FileChooserUIAccessor fileChooserUIAccessor) {
         super(fileChooserUIAccessor);
     }

core/src/main/resources/com/github/weisj/darklaf/properties/ui/fileChooser.properties

@@ -52,3 +52,5 @@ FileView.directoryIcon              = files/folder.svg[themed]
 FileView.computerIcon               = files/desktop.svg[themed]
 FileView.floppyDriveIcon            = menu/save.svg[themed]
 FileView.hardDriveIcon              = files/drive.svg[themed]
+FileView.textFileIcon               = files/text.svg[themed]
+FileView.imageFileIcon              = files/image.svg[themed]