GrxTextItem.java

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/*
 * Copyright (c) 2008, AIST, the University of Tokyo and General Robotix Inc.
 * All rights reserved. This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * Contributors:
 * General Robotix Inc.
 * National Institute of Advanced Industrial Science and Technology (AIST) 
 */
/*
 *  GrxTextItem.java
 *
 *  Copyright (C) 2007 GeneralRobotix, Inc.
 *  All Rights Reserved
 *
 *  @author Yuichiro Kawasumi (General Robotix, Inc.)
 */

package com.generalrobotix.ui.item;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.FileDialog;

import com.generalrobotix.ui.grxui.GrxUIPerspectiveFactory;
import com.generalrobotix.ui.GrxBaseItem;
import com.generalrobotix.ui.GrxPluginManager;
import com.generalrobotix.ui.util.GrxDebugUtil;
import com.generalrobotix.ui.util.MessageBundle;

import org.eclipse.swt.widgets.Text;

@SuppressWarnings("serial") //$NON-NLS-1$
public class GrxTextItem extends GrxBaseItem {
        public static final String TITLE = "Text Item"; //$NON-NLS-1$
        public static final String FILE_EXTENSION = "txt"; //$NON-NLS-1$

        private long lastModified_ = 0;
        private String old = ""; //$NON-NLS-1$
        private int caretPosition_ = 0;
        
        public GrxTextItem(String name, GrxPluginManager manager) {
                super(name, manager);
                Action item = new Action(){
                        public String getText(){ return MessageBundle.get("GrxTextItem.menu.save"); } //$NON-NLS-1$
                        public void run(){ save(); }
                };
                setMenuItem(item);
                item = new Action(){
                        public String getText(){ return MessageBundle.get("GrxTextItem.menu.saveAs"); } //$NON-NLS-1$
                        public void run(){ saveAs(); }
                };
                setMenuItem(item);

                setExclusive(true);
        }
        
        public boolean create() {
                file_ = new File(getDefaultDir()+File.separator+getName()+"."+getFileExtention()); //$NON-NLS-1$
                setURL(file_.getPath());
                
                old=""; //$NON-NLS-1$
                lastModified_ = file_.lastModified();
//              undo_.discardAllEdits();
                caretPosition_ = 0;
                setValue(""); //$NON-NLS-1$
                return true;
        }

        public boolean load(File f) {
                String delimiter = Text.DELIMITER;
                try {
                        BufferedReader b = new BufferedReader(new FileReader(f));
                        StringBuffer buf = new StringBuffer();
                        while (b.ready()) {
                                buf.append(b.readLine() + delimiter);
                        }
                        setValue(buf.toString());
                } catch (FileNotFoundException e) {
                        GrxDebugUtil.println("TextItem: File Not Found. ("+f.getName()+")"); //$NON-NLS-1$ //$NON-NLS-2$
                        return false;
                } catch (IOException e) {
                        e.printStackTrace();
                }
                file_ = f;
                
                old = getValue();
                lastModified_ = file_.lastModified();
//              undo_.discardAllEdits();
                caretPosition_ = 0;
                return true;
        }
        
        public void rename(String newName) {
                String p = file_.getParent();
                super.rename(newName);
                file_ = new File(p+File.separator+getName()+"."+getFileExtention()); //$NON-NLS-1$
                setURL(file_.getPath());
        }

        public boolean save() {
                try {
                        GrxDebugUtil.println("savefile:"+file_.getPath()); //$NON-NLS-1$
                        if (!file_.exists())
                                saveAs();
                        FileWriter fw = new FileWriter(file_);
                        fw.write(getValue());
                        fw.close();
                        old = getValue();
//                      undo_.discardAllEdits();
                        lastModified_ = file_.lastModified();
                } catch (IOException e) {
                        e.printStackTrace();
                        return false;
                }
                return true;
        }
        
        public boolean saveAs() {
        FileDialog fdlg = new FileDialog(GrxUIPerspectiveFactory.getCurrentShell(), SWT.SAVE);
        fdlg.setFileName(getName()+"."+getFileExtention()); //$NON-NLS-1$
        fdlg.setFilterExtensions(new String[]{"*."+getFileExtention()}); //$NON-NLS-1$
        fdlg.setFilterPath(getDefaultDir().getAbsolutePath());
        final String fPath = fdlg.open();
        if (fPath != null) {
            File f = new File(fPath);
            if( f.exists() ){
                if( !MessageDialog.openConfirm( GrxUIPerspectiveFactory.getCurrentShell(), MessageBundle.get("GrxTextItem.dialog.title.saveFile"), MessageBundle.get("GrxTextItem.dialog.message.saveFile"))) //$NON-NLS-1$ //$NON-NLS-2$
                    return false;
            }else{
                try {
                    f.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            String newName = f.getName().split("[.]")[0]; //$NON-NLS-1$
            manager_.renamePlugin(this, newName);
            if (getName().equals(newName)) {
                file_ = f;
                setURL(f.getPath());
                setDefaultDirectory(f.getParent());
                return save();
            }
        }
        return false;
        }
        
        public String getValue() {
                return (String)super.getValue();
        }
        
        public boolean isEdited() {
                return !old.equals(getValue());
        }

        public boolean isModifiedExternally() {
                if (lastModified_ < file_.lastModified()) {
                        lastModified_ = file_.lastModified();
                        return true;
                }
                return false;
        }
        
        public void reload() {
                this.load(file_);
        }
        
        public void setCaretPosition(int pos) {
                caretPosition_ = pos;
        }
        
        public int getCaretPositoin() {
                return caretPosition_;
        }
}