{

org.eclipse.swt.widgets.Shell shell;

org.eclipse.swt.custom.StyledText text;

org.eclipse.swt.examples.javaviewer.JavaLineStyler lineStyler = new org.eclipse.swt.examples.javaviewer.JavaLineStyler();

org.eclipse.swt.widgets.FileDialog fileDialog;

static java.util.ResourceBundle resources = ResourceBundle.getBundle( "examples_javaviewer" );

org.eclipse.swt.widgets.Menu createFileMenu()

{

org.eclipse.swt.widgets.Menu bar = shell.getMenuBar();

org.eclipse.swt.widgets.Menu menu = new org.eclipse.swt.widgets.Menu( bar );

org.eclipse.swt.widgets.MenuItem item;

item = new org.eclipse.swt.widgets.MenuItem( menu, SWT.PUSH );

item.setText( resources.getString( "Open_menuitem" ) );

item.setAccelerator( SWT.MOD1 + 'O' );

item.addSelectionListener( new org.eclipse.swt.events.SelectionAdapter(){

public void widgetSelected( org.eclipse.swt.events.SelectionEvent event )

{

openFile();

}

} );

item = new org.eclipse.swt.widgets.MenuItem( menu, SWT.PUSH );

item.setText( resources.getString( "Exit_menuitem" ) );

item.addSelectionListener( new org.eclipse.swt.events.SelectionAdapter(){

public void widgetSelected( org.eclipse.swt.events.SelectionEvent e )

{

menuFileExit();

}

} );

return menu;

}

void createMenuBar()

{

org.eclipse.swt.widgets.Menu bar = new org.eclipse.swt.widgets.Menu( shell, SWT.BAR );

shell.setMenuBar( bar );

org.eclipse.swt.widgets.MenuItem fileItem = new org.eclipse.swt.widgets.MenuItem( bar, SWT.CASCADE );

fileItem.setText( resources.getString( "File_menuitem" ) );

fileItem.setMenu( createFileMenu() );

}

void createShell( org.eclipse.swt.widgets.Display display )

{

shell = new org.eclipse.swt.widgets.Shell( display );

shell.setText( resources.getString( "Window_title" ) );

org.eclipse.swt.layout.GridLayout layout = new org.eclipse.swt.layout.GridLayout();

layout.numColumns = 1;

shell.setLayout( layout );

shell.addShellListener( new org.eclipse.swt.events.ShellAdapter(){

public void shellClosed( org.eclipse.swt.events.ShellEvent e )

{

lineStyler.disposeColors();

text.removeLineStyleListener( lineStyler );

}

} );

}

void createStyledText()

{

text = new org.eclipse.swt.custom.StyledText( shell, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL );

org.eclipse.swt.layout.GridData spec = new org.eclipse.swt.layout.GridData();

spec.horizontalAlignment = GridData.FILL;

spec.grabExcessHorizontalSpace = true;

spec.verticalAlignment = GridData.FILL;

spec.grabExcessVerticalSpace = true;

text.setLayoutData( spec );

text.addLineStyleListener( lineStyler );

text.setEditable( false );

org.eclipse.swt.graphics.Color bg = Display.getDefault().getSystemColor( SWT.COLOR_GRAY );

text.setBackground( bg );

}

void displayError( java.lang.String msg )

{

org.eclipse.swt.widgets.MessageBox box = new org.eclipse.swt.widgets.MessageBox( shell, SWT.ICON_ERROR );

box.setMessage( msg );

box.open();

}

public static void main( java.lang.String[] args )

{

org.eclipse.swt.widgets.Display display = new org.eclipse.swt.widgets.Display();

org.eclipse.swt.examples.javaviewer.JavaViewer example = new org.eclipse.swt.examples.javaviewer.JavaViewer();

org.eclipse.swt.widgets.Shell shell = example.open( display );

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

public org.eclipse.swt.widgets.Shell open( org.eclipse.swt.widgets.Display display )

{

createShell( display );

createMenuBar();

createStyledText();

shell.setSize( 500, 400 );

shell.open();

return shell;

}

void openFile()

{

if (fileDialog == null) {

fileDialog = new org.eclipse.swt.widgets.FileDialog( shell, SWT.OPEN );

}

fileDialog.setFilterExtensions( new java.lang.String[]{ "*.java", "*.*" } );

java.lang.String name = fileDialog.open();

open( name );

}

void open( java.lang.String name )

{

final java.lang.String textString;

if (name == null || name.length() == 0) {

return;

}

java.io.File file = new java.io.File( name );

if (!file.exists()) {

java.lang.String message = MessageFormat.format( resources.getString( "Err_file_no_exist" ), new java.lang.String[]{ file.getName() } );

displayError( message );

return;

}

try {

java.io.FileInputStream stream = new java.io.FileInputStream( file.getPath() );

try {

java.io.Reader in = new java.io.BufferedReader( new java.io.InputStreamReader( stream ) );

char[] readBuffer = new char[2048];

java.lang.StringBuffer buffer = new java.lang.StringBuffer( (int) file.length() );

int n;

while ((n = in.read( readBuffer )) > 0) {

buffer.append( readBuffer, 0, n );

}

textString = buffer.toString();

stream.close();

} catch ( java.io.IOException e ) {

java.lang.String message = MessageFormat.format( resources.getString( "Err_file_io" ), new java.lang.String[]{ file.getName() } );

displayError( message );

return;

}

} catch ( java.io.FileNotFoundException e ) {

java.lang.String message = MessageFormat.format( resources.getString( "Err_not_found" ), new java.lang.String[]{ file.getName() } );

displayError( message );

return;

}

org.eclipse.swt.widgets.Display display = text.getDisplay();

display.asyncExec( new java.lang.Runnable(){

public void run()

{

text.setText( textString );

}

} );

lineStyler.parseBlockComments( textString );

}

void menuFileExit()

{

shell.close();

}