notepad.java

一个用swt开发的JAVA记事本

/*
 * Notepad.java
 *
 * Created on 2007年1月4日, 下午12:00
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package net.vlinux.notepad;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.FileInputStream;
import java.io.ObjectOutputStream;
import net.vlinux.notepad.gui.NotepadGUI;

/**
 *
 * @author vlinux
 */
public class Notepad {
    
    public static final String CONFIGURE_FILE = "notepad.cfg";
    public static final int DEFAULT_LOCAL_X = 250;
    public static final int DEFAULT_LOCAL_Y = 190;
    public static final int DEFAULT_WIDTH = 850;
    public static final int DEFAULT_HEIGHT = 650;
    public static final boolean DEFAULT_LINE_WRAP = false;
    public static final String DEFAULT_TITLE = "新建文件.txt";
    
    public static final String AUTHOR = "yushui";
    public static final String HELP = "你个猪头，连这个都不会用，去死!";
    
    private NotepadGUI gui;
    private boolean changed = false;
    
    private String title = this.DEFAULT_TITLE;
    private String content = "";
    private File editFile;
    
    public boolean isChanged(){
        return changed;
    }
    
    public void setChanged(boolean changed){
        this.changed = changed;
        if( changed == true ){
            gui.setTitle( "未保存-"+title );
        } else {
            gui.setTitle( title );
        }
    }
    
    public Notepad() throws NotepadException {
        this(null);
    }
    
    public Notepad(String filename) throws NotepadException {
        NotepadConfigure config = this.getConfigure();
        if( filename!=null ){   //打开一个文件
            editFile = openEditFile(new File(filename));
        } else {                //新建文件
            editFile = null;
            title = this.DEFAULT_TITLE;
            content = "";
        }
        
        if( config==null ){
            gui = new NotepadGUI(this.DEFAULT_LOCAL_X,this.DEFAULT_LOCAL_Y,this.DEFAULT_WIDTH,this.DEFAULT_HEIGHT, DEFAULT_LINE_WRAP, this);
        } else {
            gui = new NotepadGUI(config.getLocalx(), config.getLocaly(), config.getWidth(), config.getHeight(), config.isLineWrap(), this);
        }
        show();
    }
    
    public void show() {
        gui.setTextContent(content);
        gui.setTitle(title);
        gui.setVisible(true);
    }
    
    
    /**
     * 打开要编辑的文件
     */
    public File openEditFile( File editFile ) throws NotepadException {
        title = editFile.getName();
        if( editFile.exists()==false ){    //文件不存在，创建之
            try{
                editFile.createNewFile();
            }catch(IOException ioe){
                throw new NotepadException("创建文件"+title+"失败");
            }
        }
        //文件已经被创建，读取之
        try {
            content = getEditFileContent(editFile);
        } catch (IOException ex) {
            throw new NotepadException("读取文件"+title+"失败");
        }
        //如果不是一开始就打开
        if( gui!=null ) {
            show();
            setChanged(false);
        }
        return this.editFile = editFile;
    }
    
    
    /**
     * 创建新文件
     */
    public void createNewFile() {
        editFile = null;
        title = this.DEFAULT_TITLE;
        content = "";
        show();
        setChanged(false);
    }
    
    
    /**
     * 获取被编辑的文件
     */
    public File getEditFile() {
        return this.editFile;
    }
    
    
    
    /**
     * 获取被编辑的文件内容
     */
    public String getEditFileContent(File editFile) throws IOException {
        StringBuffer content = new StringBuffer();
        BufferedReader br = new BufferedReader( new FileReader( editFile ) );
        while( br.ready() ){
            content.append(br.readLine()+"\n");
        }
        br.close();
        return content.toString();
    }
    
    
    
    /**
     * 读取配置文件notepad.cfg
     */
    public NotepadConfigure getConfigure() {
        NotepadConfigure config = null;
        try {
            ObjectInputStream ois = new ObjectInputStream( new FileInputStream( new File(CONFIGURE_FILE) ) );
            config = (NotepadConfigure)ois.readObject();
            ois.close();
        } catch (Exception ex) {
            //
        } finally {
            return config;
        }
    }
    
    
    /**
     * 保存配置文件notepad.cfg
     */
    public void saveConfigure( NotepadConfigure config ) {
        try {
            ObjectOutputStream oos = new ObjectOutputStream( new FileOutputStream( new File(CONFIGURE_FILE) ) );
            oos.writeObject(config);
            oos.close();
        } catch (Exception ex) {
            //
        } finally {
            //
        }
    }
    
    
    /**
     * 保存被编辑的文件
     */
    public void saveEditFile(File editFile, String content) throws IOException {
        editFile.delete();
        FileOutputStream fos = new FileOutputStream( editFile );
        fos.write(content.getBytes());
        fos.close();
        setChanged(false);
    }
    
}