/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



package util;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;

import com.sun.star.frame.XDesktop;
import com.sun.star.frame.XFrame;
import com.sun.star.lang.XComponent;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.datatransfer.clipboard.*;
import com.sun.star.datatransfer.*;

public class SysUtils {

    public static String getJavaPath() {
        String cp = (String) System.getProperty("java.class.path");
        String jh = (String) System.getProperty("java.home");
        String fs = (String) System.getProperty("file.separator");
        jh = jh + fs + "bin" + fs;
        jh = jh + "java -classpath "+cp;
        return jh;
    }

  static ArrayList files = new ArrayList();

  public static Object[] traverse( String afileDirectory ) {

    File fileDirectory = new File(afileDirectory);
    // Testing, if the file is a directory, and if so, it throws an exception
    if ( !fileDirectory.isDirectory() ) {
      throw new IllegalArgumentException(
      "not a directory: " + fileDirectory.getName()
      );
    }

    // Getting all files and directories in the current directory
    File[] entries = fileDirectory.listFiles(
    new FileFilter() {
      public boolean accept( File pathname ) {
        return true;
      }
    }
    );

    // Iterating for each file and directory
    for ( int i = 0; i < entries.length; ++i ) {
      // Testing, if the entry in the list is a directory
      if ( entries[ i ].isDirectory() ) {
        // Recursive call for the new directory
        traverse( entries[ i ].getAbsolutePath() );
      } else {
        // adding file to List
        try {
          // Composing the URL by replacing all backslashs
          String stringUrl = "file:///"
          + entries[ i ].getAbsolutePath().replace( '\\', '/' );
          files.add(stringUrl);
        }
        catch( Exception exception ) {
          exception.printStackTrace();
        }

      }
    }
    return files.toArray();
  }

  public static XComponent getActiveComponent(XMultiServiceFactory msf) {
    XComponent ac = null;
    try {
        Object desk = msf.createInstance("com.sun.star.frame.Desktop");
        XDesktop xDesk = (XDesktop) UnoRuntime.queryInterface(XDesktop.class,desk);
        ac = xDesk.getCurrentComponent();
    } catch (com.sun.star.uno.Exception e) {
        System.out.println("Couldn't get active Component");
    }
    return ac;
  }

  public static XFrame getActiveFrame(XMultiServiceFactory msf) {
    try {
        Object desk = msf.createInstance("com.sun.star.frame.Desktop");
        XDesktop xDesk = (XDesktop) UnoRuntime.queryInterface(XDesktop.class,desk);
        return xDesk.getCurrentFrame();
    } catch (com.sun.star.uno.Exception e) {
        System.out.println("Couldn't get active Component");
    }

    return null;
  }

  /**
   * Tries to obtain text data from cliboard if such one exists.
   * The method iterates through all 'text/plain' supported data
   * flavors and returns the first non-null String value.
   *
   * @param msf MultiserviceFactory
   * @return First found string clipboard contents or null if no
   *    text contents were found.
   * @throws com.sun.star.uno.Exception if system clipboard is not accessible.
   */
  public static String getSysClipboardText(XMultiServiceFactory msf)
        throws com.sun.star.uno.Exception {

    XClipboard xCB = (XClipboard) UnoRuntime.queryInterface
        (XClipboard.class, msf.createInstance
        ("com.sun.star.datatransfer.clipboard.SystemClipboard"));

    XTransferable xTrans = xCB.getContents();

    DataFlavor[] dfs = xTrans.getTransferDataFlavors();

    for (int i = 0; i < dfs.length; i++) {
        if (dfs[i].MimeType.startsWith("text/plain")) {
            Object data = xTrans.getTransferData(dfs[i]);
            if (data != null && data instanceof String) {
                return (String) data;
            }
        }
    }

    return null;
  }
}