org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/debug/ui/launchConfigurations/AppletMainTab.java - jdt/eclipse.jdt.debug - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.debug.ui.launchConfigurations;


 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.debug.core.ILaunchConfiguration;
 import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
 import org.eclipse.jdt.core.IClassFile;
 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaModel;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.IMember;
 import org.eclipse.jdt.core.IType;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.Signature;
 import org.eclipse.jdt.internal.debug.ui.IJavaDebugHelpContextIds;
 import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
 import org.eclipse.jdt.internal.debug.ui.launcher.AppletSelectionDialog;
 import org.eclipse.jdt.internal.debug.ui.launcher.JavaLaunchConfigurationTab;
 import org.eclipse.jdt.internal.debug.ui.launcher.LauncherMessages;
 import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
 import org.eclipse.jdt.launching.IVMInstall;
 import org.eclipse.jdt.launching.JavaRuntime;
 import org.eclipse.jdt.ui.ISharedImages;
 import org.eclipse.jdt.ui.JavaElementLabelProvider;
 import org.eclipse.jdt.ui.JavaUI;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.window.Window;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Font;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.dialogs.ElementListSelectionDialog;
 import org.eclipse.ui.help.WorkbenchHelp;

 /**
  * This tab appears for java applet launch configurations and allows the user to edit
  * attributes such as the applet class to launch and its owning project, if any.
  * <p>
  * This class may be instantiated. This class is not intended to be subclassed.
  * </p>
  * @since 2.1
  */
 public class AppletMainTab extends JavaLaunchConfigurationTab {

 	// Project UI widgets
 	private Label fProjLabel;
 	private Text fProjText;
 	private Button fProjButton;

 	// Main class UI widgets
 	private Label fMainLabel;
 	private Text fMainText;
 	private Button fSearchButton;

 	// Applet viewer UI widgets
 	private Label fAppletViewerClassLabel;
 	private Text fAppletViewerClassText;
 	private Button fAppletViewerClassDefaultButton;

 	private static final String EMPTY_STRING= ""; //$NON-NLS-1$

 	private ModifyListener fModifyListener= new ModifyListener() {
 		public void modifyText(ModifyEvent e) {
 			updateLaunchConfigurationDialog();
 		}
 	};

 	private SelectionAdapter fSelectionListener= new SelectionAdapter() {
 		public void widgetSelected(SelectionEvent e) {
 			Object source= e.getSource();
 			if (source == fSearchButton) {
 				handleSearchButtonSelected();
 			} else if (source == fProjButton) {
 				handleProjectButtonSelected();
 			} else if (source == fAppletViewerClassDefaultButton) {
 				handleAppletViewerClassDefaultSelected();
 			}
 		}
 	};

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(Composite)
 	 */
 	public void createControl(Composite parent) {
 		Font font= parent.getFont();

 		Composite projComp= new Composite(parent, SWT.NONE);
 		setControl(projComp);
 		WorkbenchHelp.setHelp(getControl(), IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_APPLET_MAIN_TAB);

 		GridLayout projLayout= new GridLayout();
 		projLayout.numColumns= 2;
 		projComp.setLayout(projLayout);
 		projComp.setFont(font);

 		GridData gd;
 		fProjLabel= new Label(projComp, SWT.NONE);
 		fProjLabel.setText(LauncherMessages.getString("appletlauncher.maintab.projectlabel.name")); //$NON-NLS-1$
 		gd= new GridData();
 		gd.horizontalSpan = 2;
 		fProjLabel.setLayoutData(gd);
 		fProjLabel.setFont(font);

 		fProjText= new Text(projComp, SWT.SINGLE | SWT.BORDER);
 		gd= new GridData(GridData.FILL_HORIZONTAL);
 		fProjText.setLayoutData(gd);
 		fProjText.setFont(font);
 		fProjText.addModifyListener(fModifyListener);

 		fProjButton= createPushButton(projComp, LauncherMessages.getString("appletlauncher.maintab.browselabel.name"), null); //$NON-NLS-1$
 		fProjButton.addSelectionListener(fSelectionListener);

 		createVerticalSpacer(projComp, 2);

 		fMainLabel= new Label(projComp, SWT.NONE);
 		fMainLabel.setText(LauncherMessages.getString("appletlauncher.maintab.mainclasslabel.name")); //$NON-NLS-1$
 		gd= new GridData();
 		gd.horizontalSpan = 2;
 		fMainLabel.setLayoutData(gd);
 		fMainLabel.setFont(font);

 		fMainText= new Text(projComp, SWT.SINGLE | SWT.BORDER);
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		fMainText.setLayoutData(gd);
 		fMainText.setFont(font);
 		fMainText.addModifyListener(fModifyListener);

 		fSearchButton= createPushButton(projComp,LauncherMessages.getString("appletlauncher.maintab.searchlabel.name"), null); //$NON-NLS-1$
 		fSearchButton.addSelectionListener(fSelectionListener);

 		createVerticalSpacer(projComp, 2);

 		fAppletViewerClassLabel= new Label(projComp, SWT.NONE);
 		fAppletViewerClassLabel.setText(LauncherMessages.getString("AppletMainTab.1")); //$NON-NLS-1$
 		gd= new GridData();
 		gd.horizontalSpan= 2;
 		fAppletViewerClassLabel.setLayoutData(gd);
 		fAppletViewerClassLabel.setFont(font);

 		fAppletViewerClassText= new Text(projComp, SWT.SINGLE | SWT.BORDER);
 		gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		gd.horizontalSpan= 2;
 		fAppletViewerClassText.setLayoutData(gd);
 		fAppletViewerClassText.setFont(font);
 		fAppletViewerClassText.addModifyListener(fModifyListener);

 		fAppletViewerClassDefaultButton= createCheckButton(projComp, LauncherMessages.getString("AppletMainTab.2")); //$NON-NLS-1$
 		gd= new GridData();
 		gd.horizontalSpan= 2;
 		fAppletViewerClassDefaultButton.setLayoutData(gd);
 		fAppletViewerClassDefaultButton.addSelectionListener(fSelectionListener);
 	}

 	/**
 	 * Set the appropriate enabled state for the appletviewqer text widget.
 	 */
 	protected void setAppletViewerTextEnabledState() {
 		if (isDefaultAppletViewerClassName()) {
 			fAppletViewerClassText.setEnabled(false);
 		} else {
 			fAppletViewerClassText.setEnabled(true);
 		}
 	}

 	/**
 	 * Returns whether the default appletviewer is to be used
 	 */
 	protected boolean isDefaultAppletViewerClassName() {
 		return fAppletViewerClassDefaultButton.getSelection();
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
 	 */
 	public void initializeFrom(ILaunchConfiguration config) {
 		updateProjectFromConfig(config);
 		updateMainTypeFromConfig(config);
 		updateAppletViewerClassNameFromConfig(config);
 	}

 	private void updateProjectFromConfig(ILaunchConfiguration config) {
 		String projectName= EMPTY_STRING;
 		try {
 			projectName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, EMPTY_STRING);
 		} catch (CoreException ce) {
 			JDIDebugUIPlugin.log(ce);
 		}
 		fProjText.setText(projectName);
 	}

 	private void updateMainTypeFromConfig(ILaunchConfiguration config) {
 		String mainTypeName= EMPTY_STRING;
 		try {
 			mainTypeName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, EMPTY_STRING);
 		} catch (CoreException ce) {
 			JDIDebugUIPlugin.log(ce);
 		}
 		fMainText.setText(mainTypeName);
 	}

 	private void updateAppletViewerClassNameFromConfig(ILaunchConfiguration config) {
 		String appletViewerClassName= null;
 		try {
 			appletViewerClassName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, (String)null);
 			if (appletViewerClassName == null) {
 				fAppletViewerClassText.setText(IJavaLaunchConfigurationConstants.DEFAULT_APPLETVIEWER_CLASS);
 				fAppletViewerClassDefaultButton.setSelection(true);
 			} else {
 				fAppletViewerClassText.setText(appletViewerClassName);
 				fAppletViewerClassDefaultButton.setSelection(false);
 			}
 			setAppletViewerTextEnabledState();
 		} catch (CoreException ce) {
 			JDIDebugUIPlugin.log(ce);
 		}
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
 	 */
 	public void performApply(ILaunchConfigurationWorkingCopy config) {
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, fMainText.getText());
 		performApplyAppletViewerClassName(config);
 	}

 	/**
 	 * Set the current appletviewer class name on the specified working copy.
 	 */
 	private void performApplyAppletViewerClassName(ILaunchConfigurationWorkingCopy config) {
 		String appletViewerClassName= null;
 		if (!isDefaultAppletViewerClassName()) {
 			appletViewerClassName= fAppletViewerClassText.getText().trim();
 			if (appletViewerClassName.length() <= 0) {
 				appletViewerClassName= null;
 			}
 		}
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, appletViewerClassName);
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#dispose()
 	 */
 	public void dispose() {
 	}

 	/**
 	 * Show a dialog that lists all main types
 	 */
 	private void handleSearchButtonSelected() {

 		IJavaProject javaProject= getJavaProject();
 		Shell shell= getShell();
 		AppletSelectionDialog dialog =
 			new AppletSelectionDialog(
 				shell,
 				getLaunchConfigurationDialog(),
 				javaProject);
 		dialog.setTitle(LauncherMessages.getString("appletlauncher.maintab.selection.applet.dialog.title")); //$NON-NLS-1$
 		dialog.setMessage(LauncherMessages.getString("appletlauncher.maintab.selection.applet.dialog.message")); //$NON-NLS-1$
 		if (dialog.open() == Window.CANCEL) {
 			return;
 		}

 		Object[] results= dialog.getResult();
 		if ((results == null) || (results.length < 1)) {
 			return;
 		}
 		IType type= (IType)results[0];
 		if (type != null) {
 			fMainText.setText(type.getFullyQualifiedName());
 			javaProject= type.getJavaProject();
 			fProjText.setText(javaProject.getElementName());
 		}
 	}

 	/**
 	 * Show a dialog that lets the user select a project.  This in turn provides
 	 * context for the main type, allowing the user to key a main type name, or
 	 * constraining the search for main types to the specified project.
 	 */
 	private void handleProjectButtonSelected() {
 		IJavaProject project= chooseJavaProject();
 		if (project == null) {
 			return;
 		}

 		String projectName= project.getElementName();
 		fProjText.setText(projectName);
 	}

 	/**
 	 * When the "use default" button is selected, update the "applet viewer class" text.
 	 */
 	private void handleAppletViewerClassDefaultSelected() {
 		setAppletViewerTextEnabledState();
 		if (isDefaultAppletViewerClassName()) {
 			fAppletViewerClassText.setText(IJavaLaunchConfigurationConstants.DEFAULT_APPLETVIEWER_CLASS);
 		} else {
 			fAppletViewerClassText.setText(EMPTY_STRING);
 		}
 	}

 	/**
 	 * Realize a Java Project selection dialog and return the first selected project,
 	 * or null if there was none.
 	 */
 	private IJavaProject chooseJavaProject() {
 		IJavaProject[] projects;
 		try {
 			projects= JavaCore.create(getWorkspaceRoot()).getJavaProjects();
 		} catch (JavaModelException jme) {
 			JDIDebugUIPlugin.log(jme);
 			projects= new IJavaProject[0];
 		}

 		ILabelProvider labelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
 		ElementListSelectionDialog dialog= new ElementListSelectionDialog(getShell(), labelProvider);
 		dialog.setTitle(LauncherMessages.getString("appletlauncher.maintab.selection.project.dialog.title")); //$NON-NLS-1$
 		dialog.setMessage(LauncherMessages.getString("appletlauncher.maintab.selection.project.dialog.message")); //$NON-NLS-1$
 		dialog.setElements(projects);

 		IJavaProject javaProject= getJavaProject();
 		if (javaProject != null) {
 			dialog.setInitialSelections(new Object[] { javaProject });
 		}
 		if (dialog.open() == Window.OK) {
 			return (IJavaProject) dialog.getFirstResult();
 		}
 		return null;
 	}

 	/**
 	 * Return the IJavaProject corresponding to the project name in the project name
 	 * text field, or null if the text does not match a project name.
 	 */
 	private IJavaProject getJavaProject() {
 		String projectName= fProjText.getText().trim();
 		if (projectName.length() < 1) {
 			return null;
 		}
 		return getJavaModel().getJavaProject(projectName);
 	}

 	/**
 	 * Convenience method to get the workspace root.
 	 */
 	private IWorkspaceRoot getWorkspaceRoot() {
 		return ResourcesPlugin.getWorkspace().getRoot();
 	}

 	/**
 	 * Convenience method to get access to the java model.
 	 */
 	private IJavaModel getJavaModel() {
 		return JavaCore.create(getWorkspaceRoot());
 	}


 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#isValid(ILaunchConfiguration)
 	 */
 	public boolean isValid(ILaunchConfiguration launchConfig) {

 		setErrorMessage(null);
 		setMessage(null);

 		// Verify project
 		String name= fProjText.getText().trim();
 		if (name.length() > 0) {
 			if (!ResourcesPlugin.getWorkspace().getRoot().getProject(name).exists()) {
 				setErrorMessage(LauncherMessages.getString("appletlauncher.maintab.project.error.doesnotexist")); //$NON-NLS-1$
 				return false;
 			}
 		}

 		// Verify applet class
 		name= fMainText.getText().trim();
 		if (name.length() == 0) {
 			setErrorMessage(LauncherMessages.getString("appletlauncher.maintab.type.error.doesnotexist")); //$NON-NLS-1$
 			return false;
 		}

 		// Verify appletviewer class
 		name= fAppletViewerClassText.getText().trim();
 		if (name.length() == 0) {
 			setErrorMessage(LauncherMessages.getString("AppletMainTab.3"));  //$NON-NLS-1$
 			return false;
 		}

 		return true;
 	}

 	/**
 	 * Initialize default attribute values based on the
 	 * given Java element.
 	 */
 	private void initializeDefaults(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
 		initializeJavaProject(javaElement, config);
 		initializeMainTypeAndName(javaElement, config);
 		initializeHardCodedDefaults(config);
 		initializeAppletViewerClass(config);
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#setDefaults(ILaunchConfigurationWorkingCopy)
 	 */
 	public void setDefaults(ILaunchConfigurationWorkingCopy config) {
 		IJavaElement je= getContext();
 		if (je == null) {
 			initializeHardCodedDefaults(config);
 		} else {
 			initializeDefaults(je, config);
 		}
 	}

 	/**
 	 * Set the main type & name attributes on the working copy based on the IJavaElement
 	 */
 	private void initializeMainTypeAndName(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
 		String name= null;
 		if (javaElement instanceof IMember) {
 			IMember member= (IMember)javaElement;
 			if (member.isBinary()) {
 				javaElement= member.getClassFile();
 			} else {
 				javaElement= member.getCompilationUnit();
 			}
 		}
 		if (javaElement instanceof ICompilationUnit || javaElement instanceof IClassFile) {
 			if (javaElement.getElementType() == IJavaElement.COMPILATION_UNIT) {
 				ICompilationUnit cu= (ICompilationUnit) javaElement;
 				IType mainType= cu.getType(Signature.getQualifier(cu.getElementName()));
 				if (mainType.exists()) {
 					name= mainType.getFullyQualifiedName();
 				}
 			} else if (javaElement.getElementType() == IJavaElement.CLASS_FILE) {
 				try {
 					IType mainType= ((IClassFile)javaElement).getType();
 					name= mainType.getFullyQualifiedName();
 				} catch(JavaModelException e) {
 				}
 			}
 		}
 		if (name != null) {
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, name);
 			if (name.length() > 0) {
 				int index= name.lastIndexOf('.');
 				if (index > 0) {
 					name= name.substring(index + 1);
 				}
 				name= getLaunchConfigurationDialog().generateName(name);
 				config.rename(name);
 			}
 		}
 	}

 	/**
 	 * Set the VM attributes on the working copy based on the workbench default VM.
 	 */
 	private void initializeDefaultVM(ILaunchConfigurationWorkingCopy config) {
 		IVMInstall vmInstall= JavaRuntime.getDefaultVMInstall();
 		if (vmInstall == null) {
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_NAME, (String)null);
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_TYPE, (String)null);
 		} else {
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_NAME, vmInstall.getName());
 			config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_TYPE, vmInstall.getVMInstallType().getId());
 		}
 	}

 	/**
 	 * Initialize those attributes whose default values are independent of any context.
 	 */
 	private void initializeHardCodedDefaults(ILaunchConfigurationWorkingCopy config) {
 		initializeDefaultVM(config);
 	}

 	/**
 	 * Initialize the appletviewer class name attribute.
 	 */
 	private void initializeAppletViewerClass(ILaunchConfigurationWorkingCopy config) {
 		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, (String)null);
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getName()
 	 */
 	public String getName() {
 		return LauncherMessages.getString("appletlauncher.maintab.name"); //$NON-NLS-1$
 	}

 	/**
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#getImage()
 	 */
 	public Image getImage() {
 		return JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#activated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
 	 */
 	public void activated(ILaunchConfigurationWorkingCopy workingCopy) {
 		// do nothing when activated
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.debug.ui.ILaunchConfigurationTab#deactivated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
 	 */
 	public void deactivated(ILaunchConfigurationWorkingCopy workingCopy) {
 		// do nothing when deactivated
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.debug.ui.launchConfigurations;


	import org.eclipse.core.resources.IWorkspaceRoot;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.debug.core.ILaunchConfiguration;
	import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
	import org.eclipse.jdt.core.IClassFile;
	import org.eclipse.jdt.core.ICompilationUnit;
	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IJavaModel;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.IMember;
	import org.eclipse.jdt.core.IType;
	import org.eclipse.jdt.core.JavaCore;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.Signature;
	import org.eclipse.jdt.internal.debug.ui.IJavaDebugHelpContextIds;
	import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
	import org.eclipse.jdt.internal.debug.ui.launcher.AppletSelectionDialog;
	import org.eclipse.jdt.internal.debug.ui.launcher.JavaLaunchConfigurationTab;
	import org.eclipse.jdt.internal.debug.ui.launcher.LauncherMessages;
	import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
	import org.eclipse.jdt.launching.IVMInstall;
	import org.eclipse.jdt.launching.JavaRuntime;
	import org.eclipse.jdt.ui.ISharedImages;
	import org.eclipse.jdt.ui.JavaElementLabelProvider;
	import org.eclipse.jdt.ui.JavaUI;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.window.Window;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Font;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.dialogs.ElementListSelectionDialog;
	import org.eclipse.ui.help.WorkbenchHelp;

	/**
	* This tab appears for java applet launch configurations and allows the user to edit
	* attributes such as the applet class to launch and its owning project, if any.
	* <p>
	* This class may be instantiated. This class is not intended to be subclassed.
	* </p>
	* @since 2.1
	*/
	public class AppletMainTab extends JavaLaunchConfigurationTab {

	// Project UI widgets
	private Label fProjLabel;
	private Text fProjText;
	private Button fProjButton;

	// Main class UI widgets
	private Label fMainLabel;
	private Text fMainText;
	private Button fSearchButton;

	// Applet viewer UI widgets
	private Label fAppletViewerClassLabel;
	private Text fAppletViewerClassText;
	private Button fAppletViewerClassDefaultButton;

	private static final String EMPTY_STRING= ""; //$NON-NLS-1$

	private ModifyListener fModifyListener= new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	updateLaunchConfigurationDialog();
	}
	};

	private SelectionAdapter fSelectionListener= new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	Object source= e.getSource();
	if (source == fSearchButton) {
	handleSearchButtonSelected();
	} else if (source == fProjButton) {
	handleProjectButtonSelected();
	} else if (source == fAppletViewerClassDefaultButton) {
	handleAppletViewerClassDefaultSelected();
	}
	}
	};

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#createControl(Composite)
	*/
	public void createControl(Composite parent) {
	Font font= parent.getFont();

	Composite projComp= new Composite(parent, SWT.NONE);
	setControl(projComp);
	WorkbenchHelp.setHelp(getControl(), IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_APPLET_MAIN_TAB);

	GridLayout projLayout= new GridLayout();
	projLayout.numColumns= 2;
	projComp.setLayout(projLayout);
	projComp.setFont(font);

	GridData gd;
	fProjLabel= new Label(projComp, SWT.NONE);
	fProjLabel.setText(LauncherMessages.getString("appletlauncher.maintab.projectlabel.name")); //$NON-NLS-1$
	gd= new GridData();
	gd.horizontalSpan = 2;
	fProjLabel.setLayoutData(gd);
	fProjLabel.setFont(font);

	fProjText= new Text(projComp, SWT.SINGLE \| SWT.BORDER);
	gd= new GridData(GridData.FILL_HORIZONTAL);
	fProjText.setLayoutData(gd);
	fProjText.setFont(font);
	fProjText.addModifyListener(fModifyListener);

	fProjButton= createPushButton(projComp, LauncherMessages.getString("appletlauncher.maintab.browselabel.name"), null); //$NON-NLS-1$
	fProjButton.addSelectionListener(fSelectionListener);

	createVerticalSpacer(projComp, 2);

	fMainLabel= new Label(projComp, SWT.NONE);
	fMainLabel.setText(LauncherMessages.getString("appletlauncher.maintab.mainclasslabel.name")); //$NON-NLS-1$
	gd= new GridData();
	gd.horizontalSpan = 2;
	fMainLabel.setLayoutData(gd);
	fMainLabel.setFont(font);

	fMainText= new Text(projComp, SWT.SINGLE \| SWT.BORDER);
	gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	fMainText.setLayoutData(gd);
	fMainText.setFont(font);
	fMainText.addModifyListener(fModifyListener);

	fSearchButton= createPushButton(projComp,LauncherMessages.getString("appletlauncher.maintab.searchlabel.name"), null); //$NON-NLS-1$
	fSearchButton.addSelectionListener(fSelectionListener);

	createVerticalSpacer(projComp, 2);

	fAppletViewerClassLabel= new Label(projComp, SWT.NONE);
	fAppletViewerClassLabel.setText(LauncherMessages.getString("AppletMainTab.1")); //$NON-NLS-1$
	gd= new GridData();
	gd.horizontalSpan= 2;
	fAppletViewerClassLabel.setLayoutData(gd);
	fAppletViewerClassLabel.setFont(font);

	fAppletViewerClassText= new Text(projComp, SWT.SINGLE \| SWT.BORDER);
	gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	gd.horizontalSpan= 2;
	fAppletViewerClassText.setLayoutData(gd);
	fAppletViewerClassText.setFont(font);
	fAppletViewerClassText.addModifyListener(fModifyListener);

	fAppletViewerClassDefaultButton= createCheckButton(projComp, LauncherMessages.getString("AppletMainTab.2")); //$NON-NLS-1$
	gd= new GridData();
	gd.horizontalSpan= 2;
	fAppletViewerClassDefaultButton.setLayoutData(gd);
	fAppletViewerClassDefaultButton.addSelectionListener(fSelectionListener);
	}

	/**
	* Set the appropriate enabled state for the appletviewqer text widget.
	*/
	protected void setAppletViewerTextEnabledState() {
	if (isDefaultAppletViewerClassName()) {
	fAppletViewerClassText.setEnabled(false);
	} else {
	fAppletViewerClassText.setEnabled(true);
	}
	}

	/**
	* Returns whether the default appletviewer is to be used
	*/
	protected boolean isDefaultAppletViewerClassName() {
	return fAppletViewerClassDefaultButton.getSelection();
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
	*/
	public void initializeFrom(ILaunchConfiguration config) {
	updateProjectFromConfig(config);
	updateMainTypeFromConfig(config);
	updateAppletViewerClassNameFromConfig(config);
	}

	private void updateProjectFromConfig(ILaunchConfiguration config) {
	String projectName= EMPTY_STRING;
	try {
	projectName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, EMPTY_STRING);
	} catch (CoreException ce) {
	JDIDebugUIPlugin.log(ce);
	}
	fProjText.setText(projectName);
	}

	private void updateMainTypeFromConfig(ILaunchConfiguration config) {
	String mainTypeName= EMPTY_STRING;
	try {
	mainTypeName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, EMPTY_STRING);
	} catch (CoreException ce) {
	JDIDebugUIPlugin.log(ce);
	}
	fMainText.setText(mainTypeName);
	}

	private void updateAppletViewerClassNameFromConfig(ILaunchConfiguration config) {
	String appletViewerClassName= null;
	try {
	appletViewerClassName= config.getAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, (String)null);
	if (appletViewerClassName == null) {
	fAppletViewerClassText.setText(IJavaLaunchConfigurationConstants.DEFAULT_APPLETVIEWER_CLASS);
	fAppletViewerClassDefaultButton.setSelection(true);
	} else {
	fAppletViewerClassText.setText(appletViewerClassName);
	fAppletViewerClassDefaultButton.setSelection(false);
	}
	setAppletViewerTextEnabledState();
	} catch (CoreException ce) {
	JDIDebugUIPlugin.log(ce);
	}
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
	*/
	public void performApply(ILaunchConfigurationWorkingCopy config) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, fProjText.getText());
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, fMainText.getText());
	performApplyAppletViewerClassName(config);
	}

	/**
	* Set the current appletviewer class name on the specified working copy.
	*/
	private void performApplyAppletViewerClassName(ILaunchConfigurationWorkingCopy config) {
	String appletViewerClassName= null;
	if (!isDefaultAppletViewerClassName()) {
	appletViewerClassName= fAppletViewerClassText.getText().trim();
	if (appletViewerClassName.length() <= 0) {
	appletViewerClassName= null;
	}
	}
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, appletViewerClassName);
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#dispose()
	*/
	public void dispose() {
	}

	/**
	* Show a dialog that lists all main types
	*/
	private void handleSearchButtonSelected() {

	IJavaProject javaProject= getJavaProject();
	Shell shell= getShell();
	AppletSelectionDialog dialog =
	new AppletSelectionDialog(
	shell,
	getLaunchConfigurationDialog(),
	javaProject);
	dialog.setTitle(LauncherMessages.getString("appletlauncher.maintab.selection.applet.dialog.title")); //$NON-NLS-1$
	dialog.setMessage(LauncherMessages.getString("appletlauncher.maintab.selection.applet.dialog.message")); //$NON-NLS-1$
	if (dialog.open() == Window.CANCEL) {
	return;
	}

	Object[] results= dialog.getResult();
	if ((results == null) \|\| (results.length < 1)) {
	return;
	}
	IType type= (IType)results[0];
	if (type != null) {
	fMainText.setText(type.getFullyQualifiedName());
	javaProject= type.getJavaProject();
	fProjText.setText(javaProject.getElementName());
	}
	}

	/**
	* Show a dialog that lets the user select a project. This in turn provides
	* context for the main type, allowing the user to key a main type name, or
	* constraining the search for main types to the specified project.
	*/
	private void handleProjectButtonSelected() {
	IJavaProject project= chooseJavaProject();
	if (project == null) {
	return;
	}

	String projectName= project.getElementName();
	fProjText.setText(projectName);
	}

	/**
	* When the "use default" button is selected, update the "applet viewer class" text.
	*/
	private void handleAppletViewerClassDefaultSelected() {
	setAppletViewerTextEnabledState();
	if (isDefaultAppletViewerClassName()) {
	fAppletViewerClassText.setText(IJavaLaunchConfigurationConstants.DEFAULT_APPLETVIEWER_CLASS);
	} else {
	fAppletViewerClassText.setText(EMPTY_STRING);
	}
	}

	/**
	* Realize a Java Project selection dialog and return the first selected project,
	* or null if there was none.
	*/
	private IJavaProject chooseJavaProject() {
	IJavaProject[] projects;
	try {
	projects= JavaCore.create(getWorkspaceRoot()).getJavaProjects();
	} catch (JavaModelException jme) {
	JDIDebugUIPlugin.log(jme);
	projects= new IJavaProject[0];
	}

	ILabelProvider labelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT);
	ElementListSelectionDialog dialog= new ElementListSelectionDialog(getShell(), labelProvider);
	dialog.setTitle(LauncherMessages.getString("appletlauncher.maintab.selection.project.dialog.title")); //$NON-NLS-1$
	dialog.setMessage(LauncherMessages.getString("appletlauncher.maintab.selection.project.dialog.message")); //$NON-NLS-1$
	dialog.setElements(projects);

	IJavaProject javaProject= getJavaProject();
	if (javaProject != null) {
	dialog.setInitialSelections(new Object[] { javaProject });
	}
	if (dialog.open() == Window.OK) {
	return (IJavaProject) dialog.getFirstResult();
	}
	return null;
	}

	/**
	* Return the IJavaProject corresponding to the project name in the project name
	* text field, or null if the text does not match a project name.
	*/
	private IJavaProject getJavaProject() {
	String projectName= fProjText.getText().trim();
	if (projectName.length() < 1) {
	return null;
	}
	return getJavaModel().getJavaProject(projectName);
	}

	/**
	* Convenience method to get the workspace root.
	*/
	private IWorkspaceRoot getWorkspaceRoot() {
	return ResourcesPlugin.getWorkspace().getRoot();
	}

	/**
	* Convenience method to get access to the java model.
	*/
	private IJavaModel getJavaModel() {
	return JavaCore.create(getWorkspaceRoot());
	}


	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#isValid(ILaunchConfiguration)
	*/
	public boolean isValid(ILaunchConfiguration launchConfig) {

	setErrorMessage(null);
	setMessage(null);

	// Verify project
	String name= fProjText.getText().trim();
	if (name.length() > 0) {
	if (!ResourcesPlugin.getWorkspace().getRoot().getProject(name).exists()) {
	setErrorMessage(LauncherMessages.getString("appletlauncher.maintab.project.error.doesnotexist")); //$NON-NLS-1$
	return false;
	}
	}

	// Verify applet class
	name= fMainText.getText().trim();
	if (name.length() == 0) {
	setErrorMessage(LauncherMessages.getString("appletlauncher.maintab.type.error.doesnotexist")); //$NON-NLS-1$
	return false;
	}

	// Verify appletviewer class
	name= fAppletViewerClassText.getText().trim();
	if (name.length() == 0) {
	setErrorMessage(LauncherMessages.getString("AppletMainTab.3")); //$NON-NLS-1$
	return false;
	}

	return true;
	}

	/**
	* Initialize default attribute values based on the
	* given Java element.
	*/
	private void initializeDefaults(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
	initializeJavaProject(javaElement, config);
	initializeMainTypeAndName(javaElement, config);
	initializeHardCodedDefaults(config);
	initializeAppletViewerClass(config);
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#setDefaults(ILaunchConfigurationWorkingCopy)
	*/
	public void setDefaults(ILaunchConfigurationWorkingCopy config) {
	IJavaElement je= getContext();
	if (je == null) {
	initializeHardCodedDefaults(config);
	} else {
	initializeDefaults(je, config);
	}
	}

	/**
	* Set the main type & name attributes on the working copy based on the IJavaElement
	*/
	private void initializeMainTypeAndName(IJavaElement javaElement, ILaunchConfigurationWorkingCopy config) {
	String name= null;
	if (javaElement instanceof IMember) {
	IMember member= (IMember)javaElement;
	if (member.isBinary()) {
	javaElement= member.getClassFile();
	} else {
	javaElement= member.getCompilationUnit();
	}
	}
	if (javaElement instanceof ICompilationUnit \|\| javaElement instanceof IClassFile) {
	if (javaElement.getElementType() == IJavaElement.COMPILATION_UNIT) {
	ICompilationUnit cu= (ICompilationUnit) javaElement;
	IType mainType= cu.getType(Signature.getQualifier(cu.getElementName()));
	if (mainType.exists()) {
	name= mainType.getFullyQualifiedName();
	}
	} else if (javaElement.getElementType() == IJavaElement.CLASS_FILE) {
	try {
	IType mainType= ((IClassFile)javaElement).getType();
	name= mainType.getFullyQualifiedName();
	} catch(JavaModelException e) {
	}
	}
	}
	if (name != null) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, name);
	if (name.length() > 0) {
	int index= name.lastIndexOf('.');
	if (index > 0) {
	name= name.substring(index + 1);
	}
	name= getLaunchConfigurationDialog().generateName(name);
	config.rename(name);
	}
	}
	}

	/**
	* Set the VM attributes on the working copy based on the workbench default VM.
	*/
	private void initializeDefaultVM(ILaunchConfigurationWorkingCopy config) {
	IVMInstall vmInstall= JavaRuntime.getDefaultVMInstall();
	if (vmInstall == null) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_NAME, (String)null);
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_TYPE, (String)null);
	} else {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_NAME, vmInstall.getName());
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_VM_INSTALL_TYPE, vmInstall.getVMInstallType().getId());
	}
	}

	/**
	* Initialize those attributes whose default values are independent of any context.
	*/
	private void initializeHardCodedDefaults(ILaunchConfigurationWorkingCopy config) {
	initializeDefaultVM(config);
	}

	/**
	* Initialize the appletviewer class name attribute.
	*/
	private void initializeAppletViewerClass(ILaunchConfigurationWorkingCopy config) {
	config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_APPLET_APPLETVIEWER_CLASS, (String)null);
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#getName()
	*/
	public String getName() {
	return LauncherMessages.getString("appletlauncher.maintab.name"); //$NON-NLS-1$
	}

	/**
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#getImage()
	*/
	public Image getImage() {
	return JavaUI.getSharedImages().getImage(ISharedImages.IMG_OBJS_CLASS);
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#activated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
	*/
	public void activated(ILaunchConfigurationWorkingCopy workingCopy) {
	// do nothing when activated
	}

	/* (non-Javadoc)
	* @see org.eclipse.debug.ui.ILaunchConfigurationTab#deactivated(org.eclipse.debug.core.ILaunchConfigurationWorkingCopy)
	*/
	public void deactivated(ILaunchConfigurationWorkingCopy workingCopy) {
	// do nothing when deactivated
	}
	}