com.generalrobotix.ui.item.GrxTextItem.java Source code

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Here is the source code for com.generalrobotix.ui.item.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"), //$NON-NLS-1$
                        MessageBundle.get("GrxTextItem.dialog.message.saveFile"))) //$NON-NLS-1$
                    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_;
    }
}