More file moving.

src/main/java/com/sk89q/worldedit/util/FileDialogUtil.java

@@ -0,0 +1,92 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.util;
+
+import java.io.*;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import javax.swing.JFileChooser;
+import javax.swing.filechooser.FileFilter;
+import com.sk89q.util.StringUtil;
+
+public class FileDialogUtil {
+    public static File showSaveDialog(String[] exts) {
+        JFileChooser dialog = new JFileChooser();
+        
+        if (exts != null) {
+            dialog.setFileFilter(new ExtensionFilter(exts));
+        }
+
+        int returnVal = dialog.showSaveDialog(null);
+
+        if (returnVal == JFileChooser.APPROVE_OPTION) {
+            return dialog.getSelectedFile();
+        }
+        
+        return null;
+    }
+    
+    public static File showOpenDialog(String[] exts) {
+        JFileChooser dialog = new JFileChooser();
+        
+        if (exts != null) {
+            dialog.setFileFilter(new ExtensionFilter(exts));
+        }
+
+        int returnVal = dialog.showOpenDialog(null);
+
+        if (returnVal == JFileChooser.APPROVE_OPTION) {
+            return dialog.getSelectedFile();
+        }
+        
+        return null;
+    }
+    
+    private static class ExtensionFilter extends FileFilter {
+        private Set<String> exts;
+        private String desc;
+        
+        public ExtensionFilter(String[] exts) {
+            this.exts = new HashSet<String>(Arrays.asList(exts));
+            
+            desc = StringUtil.joinString(exts, ",");
+        }
+        
+        @Override
+        public boolean accept(File f) {
+            if (f.isDirectory()) {
+                return true;
+            }
+            String path = f.getPath();
+            int index = path.lastIndexOf('.');
+            if (index == -1 || index == path.length() - 1) {
+                return false;
+            } else {
+                return exts.contains(path.indexOf(index + 1));
+            }
+        }
+
+        @Override
+        public String getDescription() {
+            return desc;
+        }
+    }
+}