package org.eclipse.jdt.debug.ui.launchConfigurations;

/**********************************************************************
Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
This file is 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
**********************************************************************/
 
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
import org.eclipse.debug.ui.ILaunchConfigurationDialog;
import org.eclipse.jdt.internal.debug.ui.IJavaDebugHelpContextIds;
import org.eclipse.jdt.internal.debug.ui.JDIDebugUIPlugin;
import org.eclipse.jdt.internal.debug.ui.JavaDebugImages;
import org.eclipse.jdt.internal.debug.ui.launcher.JavaLaunchConfigurationTab;
import org.eclipse.jdt.internal.debug.ui.launcher.LauncherMessages;
import org.eclipse.jdt.internal.debug.ui.launcher.VMArgumentsBlock;
import org.eclipse.jdt.internal.debug.ui.launcher.WorkingDirectoryBlock;
import org.eclipse.jdt.launching.IJavaLaunchConfigurationConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
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.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.help.WorkbenchHelp;

/**
 * A launch configuration tab that displays and edits program arguments,
 * VM arguments, and working directory launch configuration attributes.
 * <p>
 * This class may be instantiated. This class is not intended to be subclassed.
 * </p>
 * @since 2.0
 */
public class JavaArgumentsTab extends JavaLaunchConfigurationTab {
		
	// Program arguments widgets
	protected Label fPrgmArgumentsLabel;
	protected Text fPrgmArgumentsText;

	// VM arguments widgets
	protected VMArgumentsBlock fVMArgumentsBlock;
	
	// Working directory
	protected WorkingDirectoryBlock fWorkingDirectoryBlock;
		
	protected static final String EMPTY_STRING = ""; //$NON-NLS-1$
		
	public JavaArgumentsTab() {
		fVMArgumentsBlock = createVMArgsBlock();
		fWorkingDirectoryBlock = createWorkingDirBlock();
	}
	
	protected VMArgumentsBlock createVMArgsBlock() {
		return new VMArgumentsBlock();
	}
	
	protected WorkingDirectoryBlock createWorkingDirBlock() {
		return new WorkingDirectoryBlock();
	}
	
	/**
	 * @see ILaunchConfigurationTab#createControl(Composite)
	 */
	public void createControl(Composite parent) {
		Font font = parent.getFont();
		
		Composite comp = new Composite(parent, SWT.NONE);
		comp.setFont(font);
		setControl(comp);
		setHelpContextId();
		GridLayout topLayout = new GridLayout();
		comp.setLayout(topLayout);		
		GridData gd;
		
		createVerticalSpacer(comp, 1);
				
		fPrgmArgumentsLabel = new Label(comp, SWT.NONE);
		fPrgmArgumentsLabel.setText(LauncherMessages.getString("JavaArgumentsTab.&Program_arguments__5")); //$NON-NLS-1$
		fPrgmArgumentsLabel.setFont(font);
		
		fPrgmArgumentsText = new Text(comp, SWT.MULTI | SWT.WRAP | SWT.BORDER | SWT.V_SCROLL);
		gd = new GridData(GridData.FILL_BOTH);
		gd.heightHint = 40;
		gd.widthHint = 100;
		fPrgmArgumentsText.setLayoutData(gd);
		fPrgmArgumentsText.setFont(font);
		fPrgmArgumentsText.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent evt) {
				updateLaunchConfigurationDialog();
			}
		});
		
		fVMArgumentsBlock.createControl(comp);
				
		createVerticalSpacer(comp, 1);
						
		fWorkingDirectoryBlock.createControl(comp);		
	}
	
	/**
	 * Set the help context id for this launch config tab.  Subclasses may
	 * override this method.
	 */
	protected void setHelpContextId() {
		WorkbenchHelp.setHelp(getControl(), IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_ARGUMENTS_TAB);		
	}
			
	/**
	 * @see ILaunchConfigurationTab#dispose()
	 */
	public void dispose() {
	}
		
	/**
	 * @see ILaunchConfigurationTab#isValid(ILaunchConfiguration)
	 */
	public boolean isValid(ILaunchConfiguration config) {
		return fWorkingDirectoryBlock.isValid(config);
	}

	/**
	 * Defaults are empty.
	 * 
	 * @see ILaunchConfigurationTab#setDefaults(ILaunchConfigurationWorkingCopy)
	 */
	public void setDefaults(ILaunchConfigurationWorkingCopy config) {
		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROGRAM_ARGUMENTS, (String)null);
		fVMArgumentsBlock.setDefaults(config);
		config.setAttribute(IJavaLaunchConfigurationConstants.ATTR_WORKING_DIRECTORY, (String)null);
	}

	/**
	 * @see ILaunchConfigurationTab#initializeFrom(ILaunchConfiguration)
	 */
	public void initializeFrom(ILaunchConfiguration configuration) {
		try {
			fPrgmArgumentsText.setText(configuration.getAttribute(IJavaLaunchConfigurationConstants.ATTR_PROGRAM_ARGUMENTS, "")); //$NON-NLS-1$
			fVMArgumentsBlock.initializeFrom(configuration);
			fWorkingDirectoryBlock.initializeFrom(configuration);
		} catch (CoreException e) {
			setErrorMessage(LauncherMessages.getString("JavaArgumentsTab.Exception_occurred_reading_configuration___15") + e.getStatus().getMessage()); //$NON-NLS-1$
			JDIDebugUIPlugin.log(e);
		}
	}

	/**
	 * @see ILaunchConfigurationTab#performApply(ILaunchConfigurationWorkingCopy)
	 */
	public void performApply(ILaunchConfigurationWorkingCopy configuration) {
		configuration.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROGRAM_ARGUMENTS, getAttributeValueFrom(fPrgmArgumentsText));
		fVMArgumentsBlock.performApply(configuration);
		fWorkingDirectoryBlock.performApply(configuration);
	}

	/**
	 * Retuns the string in the text widget, or <code>null</code> if empty.
	 * 
	 * @return text or <code>null</code>
	 */
	protected String getAttributeValueFrom(Text text) {
		String content = text.getText().trim();
		if (content.length() > 0) {
			return content;
		}
		return null;
	}
	
	/**
	 * @see ILaunchConfigurationTab#getName()
	 */
	public String getName() {
		return LauncherMessages.getString("JavaArgumentsTab.&Arguments_16"); //$NON-NLS-1$
	}	
	
	/**
	 * @see ILaunchConfigurationTab#setLaunchConfigurationDialog(ILaunchConfigurationDialog)
	 */
	public void setLaunchConfigurationDialog(ILaunchConfigurationDialog dialog) {
		super.setLaunchConfigurationDialog(dialog);
		fWorkingDirectoryBlock.setLaunchConfigurationDialog(dialog);
		fVMArgumentsBlock.setLaunchConfigurationDialog(dialog);
	}	
	/**
	 * @see ILaunchConfigurationTab#getErrorMessage()
	 */
	public String getErrorMessage() {
		String m = super.getErrorMessage();
		if (m == null) {
			return fWorkingDirectoryBlock.getErrorMessage();
		}
		return m;
	}

	/**
	 * @see ILaunchConfigurationTab#getMessage()
	 */
	public String getMessage() {
		String m = super.getMessage();
		if (m == null) {
			return fWorkingDirectoryBlock.getMessage();
		}
		return m;
	}
	
	/**
	 * @see ILaunchConfigurationTab#getImage()
	 */
	public Image getImage() {
		return JavaDebugImages.get(JavaDebugImages.IMG_VIEW_ARGUMENTS_TAB);
	}	

}