frametesttool.java

简单的java文本编辑器

/*************************************************************************************
* 类名： FrameTestTool                                                               
*                                                                    
* 功能： 此类的主要功能为作为主类（编辑器类）的工具类，此类作为一个方法封装类，其中
*　　　　的所有实现方法都是提供给主类（编辑器类）及其相关联类所使用，此类实现了
*        FrameTestTools接口
*                                                                
**************************************************************************************/
package edit.com;

import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
import java.awt.event.KeyEvent;
import java.awt.event.InputEvent;
import javax.swing.JOptionPane;
import java.io.File;
import javax.swing.JFileChooser;
import java.awt.Component;
import javax.swing.JTextArea;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.FileWriter;
import java.io.BufferedReader;
import java.io.FileReader;
import java.awt.print.PrinterException;
import java.awt.Color;
import java.awt.event.ActionListener;

class FrameTestTool extends NewTool
                    implements FrameTestTools {
    public void addToFileMenu( JMenu aMenu ,
                               JMenuItem[] fileItems,
                               JMenuBar aMenubar ) {
        for( int i = 0 ; i < fileItems.length ; i++ )
        {
            aMenu.add( fileItems[i] );

            if( ( i == 2 ) || ( i == 4 ) || ( i == 5 ) )
            {
                aMenu.addSeparator();
            }
        }

        fileItems[0].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_N ,
                                                             InputEvent.CTRL_MASK ) );
        fileItems[1].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_O ,
                                                             InputEvent.CTRL_MASK ) );
        fileItems[2].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_C ,
                                                             InputEvent.CTRL_MASK ) );

        aMenubar.add( aMenu );
    }

    public void addToEditMenu( JMenu aMenu ,
                               JMenuItem[] editItems,
                               JMenuBar aMenubar ) {
        for( int i = 0 ; i < editItems.length ; i++ )
        {
            aMenu.add( editItems[i] );

            if( ( i == 0 ) || ( i == 4 ) || ( i == 7 ) )
            {
                aMenu.addSeparator();
            }
        }

        editItems[0].setEnabled( false );
        editItems[5].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_I , InputEvent.CTRL_MASK ) );
        editItems[6].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_R , InputEvent.CTRL_MASK ) );

        aMenubar.add( aMenu );
    }

    public void addToViewMenu( JMenu aMenu ,
                               JMenuItem[] viewItems,
                               JMenuBar aMenubar ) {
         for( int i = 0 ; i < viewItems.length ; i++ )
        {
            aMenu.add( viewItems[i] );
            if( ( i == 1 ) )
            {
                aMenu.addSeparator();
            }
        }

        viewItems[0].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_F , InputEvent.CTRL_MASK ) );
        viewItems[1].setAccelerator( KeyStroke.getKeyStroke( KeyEvent.VK_R , InputEvent.CTRL_MASK ) );

        aMenubar.add( aMenu );
    }

    public void addToHelpMenu( JMenu aMenu ,
                               JMenuItem helpItem,
                               JMenuBar aMenubar ) {
        aMenu.add( helpItem );
        aMenubar.add( aMenu );
    }

    public boolean saveDialog() {
        int option = 0;

        option = JOptionPane.showConfirmDialog( null , "save the file?" ,
                        "Save Dialog" , JOptionPane.YES_NO_CANCEL_OPTION );

        switch( option )
        {
            case JOptionPane.YES_OPTION:
            {
                return true;
            }
            case JOptionPane.NO_OPTION:
            {
                return false;
            }
            case JOptionPane.CANCEL_OPTION:
            {
                return false;
            }
        }

        return true;
    }

    public File showSaveFileDialog( FrameTestState state , Component c ) {
        int result = 0;
        JFileChooser fileChooser = new JFileChooser();

        fileChooser.setCurrentDirectory( new File( "." ) );
        fileChooser.setMultiSelectionEnabled( false );

        result = fileChooser.showSaveDialog( c );

        if( result == JFileChooser.APPROVE_OPTION )
        {
            return fileChooser.getSelectedFile();
        }
        else
        {
            return null;
        }
    }

    public File showOpenFileDialog( FrameTestState state, Component c ) {
        int result = 0;
        JFileChooser fileChooser = new JFileChooser();

        fileChooser.setCurrentDirectory( new File( "." ) );
        fileChooser.setMultiSelectionEnabled( false );

        result = fileChooser.showOpenDialog( c );

        if( result == JFileChooser.APPROVE_OPTION )
        {
            return fileChooser.getSelectedFile();
        }
        else
        {
            return null;
        }
    }

    public boolean writeToFile( File file , JTextArea editArea ) {
        int pos = 0;

        try{
                PrintWriter fileWriter = new PrintWriter( new FileWriter( file ) );

                String str = editArea.getText();

                while( true )
                {
                    pos = str.indexOf( '\12' , pos );

                    if( pos == -1 )
                    {
                        break;
                    }

                    str = str.substring(0, pos) + '\15' + str.substring(pos);
                    pos = pos + 2;
                }

                fileWriter.print( str );
                fileWriter.close();
            }catch( IOException i )
             {
                 return false;
             }

        return true;
    }

    public void newFile( EditArea editArea ,
                         JMenuItem[] editItems,
                         FrameTestState state,
                         Component c ) {
        if( saveAs( state , c , editArea ) )
        {
            editArea.setText( "" );
            editArea.setIsEditFalse();
            editItems[0].setEnabled( false );

            state.getUndoManager().discardAllEdits();
        }
    }

    public boolean saveFile( EditArea editArea ,
                             FrameTestState state,
                             Component c) {
        if( editArea.getIsEditable() )
        {
            if( state.getFile() == null )
            {
                if( state.setFile( showSaveFileDialog( state , c ) ) != null )
                {
                    if( writeToFile( state.getFile(), editArea ) )
                    {
                        return true;
                    }
                    else
                    {
                        JOptionPane.showMessageDialog( c , "error Happened!" ,
                                "error" , JOptionPane.ERROR_MESSAGE );
                        return false;
                    }
                }
            }
            else
            {
                if( writeToFile( state.getFile(), editArea ) )
                {
                    return true;
                }
                else
                {
                    JOptionPane.showMessageDialog( c , "error Happened!" ,
                            "error" , JOptionPane.ERROR_MESSAGE );
                    return false;
                }
            }
        }
        else
        {
            JOptionPane.showMessageDialog( c , "empty file invalid" ,
                                "error" , JOptionPane.ERROR_MESSAGE );
            return false;
        }

        return false;
    }

    public boolean saveAs( FrameTestState state,
                           Component c,
                           EditArea editArea ) {
        if( saveDialog() )
        {
            if( state.setFile( showSaveFileDialog( state, c ) ) != null )
            {
                if( writeToFile( state.getFile(), editArea ) )
                {
                    return true;
                }
                else
                {
                    JOptionPane.showMessageDialog( c , "error Happened!" ,
                            "error" , JOptionPane.ERROR_MESSAGE );
                    return false;
                }
            }
        }

        return true;
    }

    public void openFile( EditArea editArea ,
                         JMenuItem[] editItems,
                         FrameTestState state,
                         Component c ) {
        File openFile;
        StringBuffer strBuffer = new StringBuffer();
        BufferedReader buffer;
        String str;

        saveAs( state , c , editArea );

        if ( ( openFile = showOpenFileDialog( state, c ) ) != null )
        {
            try{
                    buffer = new BufferedReader( new FileReader( openFile ) );
                       str = buffer.readLine();

                       while( str != null )
                       {
                           strBuffer.append( str + '\12' );
                           str = buffer.readLine();
                       }

                       buffer.close();
               }catch( IOException i )
                       {}

             editArea.setText( strBuffer.toString() );
             editItems[0].setEnabled( false );
             state.getUndoManager().discardAllEdits();
             editArea.setIsEditTrue();
         }
   }

   public void closeFile( EditArea editArea ,
                           JMenuItem[] editItems,
                           FrameTestState state,
                           Component c ) {
        saveAs( state , c , editArea );
        editArea.setText( "" );
        editArea.setIsEditFalse();
        editItems[0].setEnabled( false );
    }

    public void setPrint( EditArea editArea , Component c ) {
        editArea.setString( editArea.getText() );
        editArea.setTextFont( editArea.getFont() );
        try{
                editArea.printArea();
        }catch( PrinterException p ) {
                 JOptionPane.showMessageDialog( c , "print error Happened!" ,
                            "error" , JOptionPane.ERROR_MESSAGE );
        }
    }

    public void sysExit( FrameTestState state ,
                         Component c ,
                         EditArea editArea ) {
        saveAs( state , c , editArea );
		System.exit( 0 );
    }

    public void findText( FrameTestState state ,
                          EditArea editArea,
                          Find findBox ) {
        state.setFindSet( findBox.getFindSet() );

        if ( ( state.getFindSet().getcartPoint() ) > -1 &&
             ( state.getFindSet().getLength() > -1 ) ) {
            editArea.setSelectionColor( Color.red );
            editArea.select( state.getFindSet().getcartPoint() ,
                state.getFindSet().getLength() + state.getFindSet().getcartPoint() );
        } else {
            editArea.select( 0, 0 );
        }
    }

    public void replaceText( FrameTestState state ,
                             EditArea editArea,
                             Replace replaceBox ) {
        state.setReplaceSet( replaceBox.getSingleSet() );

        if ( ( state.getReplaceSet().getStart() ) > -1 &&
             ( state.getReplaceSet().getEnd() > -1 ) ) {
            editArea.setSelectionColor( Color.red );
            editArea.select( state.getReplaceSet().getStart() ,
                             state.getReplaceSet().getEnd() );

            editArea.replaceSelection( state.getReplaceSet().getText() );
        }
    }

    public void replaceAllText( EditArea editArea,
                                Replace replaceBox ) {
        String replaceAll = replaceBox.getReplaceAll();
        editArea.setText( replaceAll );
    }

     public JMenuItem[] addItemToMenu( String[] itemText ) {
         JMenuItem[] items = new JMenuItem[itemText.length];

         for( int i = 0 ; i < itemText.length ; i++ ) {
            char[] mnemonic = itemText[i].toCharArray();

            items[i] = new JMenuItem( itemText[i],
                                      new Integer( mnemonic[0] ).intValue() );
         }

         return items;
     }

     public void addListenerToItems( JMenuItem[] items,
                                    ActionListener listener ) {
        for ( int i = 0 ; i < items.length ; i++ ) {
            items[i].addActionListener( listener );
        }
    }
}