package org.eclipse.jem.internal.beaninfo.ui;import java.util.List;import org.eclipse.core.runtime.*;import org.eclipse.jdt.core.JavaCore;import org.eclipse.jdt.internal.ui.dialogs.StatusInfo;import org.eclipse.jdt.internal.ui.dialogs.StatusUtil;import org.eclipse.jdt.internal.ui.util.PixelConverter;import org.eclipse.jdt.internal.ui.wizards.IStatusChangeListener;import org.eclipse.jdt.internal.ui.wizards.buildpaths.ArchiveFileFilter;import org.eclipse.jdt.internal.ui.wizards.buildpaths.VariablePathDialogField.ChooseVariableDialog;import org.eclipse.jdt.internal.ui.wizards.dialogfields.*;import org.eclipse.jface.window.Window;import org.eclipse.swt.SWT;import org.eclipse.swt.custom.CLabel;import org.eclipse.swt.layout.GridData;import org.eclipse.swt.layout.GridLayout;import org.eclipse.swt.widgets.*;import org.eclipse.ui.PlatformUI;/******************************************************************************* * Copyright (c)  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 *******************************************************************************//* *  $RCSfile: VariableSelectionBlock.java,v $ *  $Revision: 1.1 $  $Date: 2004/03/04 16:14:29 $  */public class VariableSelectionBlock {			private List fExistingPaths;		private StringButtonDialogField fVariableField;	private StringButtonDialogField fExtensionField;		private CLabel fFullPath;		private IStatus fVariableStatus;	private IStatus fExistsStatus;	private IStatus fExtensionStatus;		private String fVariable;	private IStatusChangeListener fContext;		private boolean fIsEmptyAllowed;		/**	 * Constructor for VariableSelectionBlock	 */	public VariableSelectionBlock(IStatusChangeListener context, List existingPaths, IPath varPath, String lastVarSelection, boolean emptyAllowed) {			fContext= context;		fExistingPaths= existingPaths;		fIsEmptyAllowed= emptyAllowed;		fVariableStatus= new StatusInfo();		fExistsStatus= new StatusInfo();				VariableSelectionAdapter adapter= new VariableSelectionAdapter();		fVariableField= new StringButtonDialogField(adapter);		fVariableField.setDialogFieldListener(adapter);		fVariableField.setLabelText(BeanInfoUIMessages.getString("VariableSelectionBlock.variable.label")); //$NON-NLS-1$		fVariableField.setButtonLabel(BeanInfoUIMessages.getString("VariableSelectionBlock.variable.button")); //$NON-NLS-1$		fExtensionField= new StringButtonDialogField(adapter);		fExtensionField.setDialogFieldListener(adapter);		fExtensionField.setLabelText(BeanInfoUIMessages.getString("VariableSelectionBlock.extension.label")); //$NON-NLS-1$		fExtensionField.setButtonLabel(BeanInfoUIMessages.getString("VariableSelectionBlock.extension.button")); //$NON-NLS-1$		if (varPath != null) {			fVariableField.setText(varPath.segment(0));			fExtensionField.setText(varPath.removeFirstSegments(1).toString());		} else {			fVariableField.setText(""); //$NON-NLS-1$			fExtensionField.setText(""); //$NON-NLS-1$		}		updateFullTextField();	}		public IPath getVariablePath() {		if (fVariable != null) {			return new Path(fVariable).append(fExtensionField.getText());		}		return null;	}		public IPath getResolvedPath() {		if (fVariable != null) {			IPath entryPath= JavaCore.getClasspathVariable(fVariable);			if (entryPath != null) {				return entryPath.append(fExtensionField.getText());			}		}		return null;	}					public void setFocus(Display display) {		fVariableField.postSetFocusOnDialogField(display);	}		public Control createControl(Composite parent) {		PixelConverter converter= new PixelConverter(parent);				int nColumns= 3;				Composite inner= new Composite(parent, SWT.NONE);		GridLayout layout= new GridLayout();		layout.marginHeight= 0;		layout.marginWidth= 0;		layout.numColumns= nColumns;		inner.setLayout(layout);				int fieldWidthHint= converter.convertWidthInCharsToPixels(50);				fVariableField.doFillIntoGrid(inner, nColumns);		LayoutUtil.setWidthHint(fVariableField.getTextControl(null), fieldWidthHint);		LayoutUtil.setHorizontalGrabbing(fVariableField.getTextControl(null));				fExtensionField.doFillIntoGrid(inner, nColumns);		LayoutUtil.setWidthHint(fExtensionField.getTextControl(null), fieldWidthHint);				Label label= new Label(inner, SWT.LEFT);		label.setLayoutData(new GridData());		label.setText(BeanInfoUIMessages.getString("VariableSelectionBlock.fullpath.label")); //$NON-NLS-1$				fFullPath= new CLabel(inner, SWT.NONE);		fFullPath.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));		DialogField.createEmptySpace(inner, nColumns - 2);		updateFullTextField();				setFocus(parent.getDisplay());				return inner;	}		// -------- VariableSelectionAdapter --------	private class VariableSelectionAdapter implements IDialogFieldListener, IStringButtonAdapter {					// -------- IDialogFieldListener		public void dialogFieldChanged(DialogField field) {			doFieldUpdated(field);		}				// -------- IStringButtonAdapter		public void changeControlPressed(DialogField field) {			doChangeControlPressed(field);		}			}		private void doChangeControlPressed(DialogField field) {		if (field == fVariableField) {			String variable= chooseVariable();			if (variable != null) {				fVariableField.setText(variable);			}		} else if (field == fExtensionField) {			IPath filePath= chooseExtJar();			if (filePath != null) {				fExtensionField.setText(filePath.toString());			}		}	}		private void doFieldUpdated(DialogField field) {		if (field == fVariableField) {			fVariableStatus= variableUpdated();		} else if (field == fExtensionField) {			fExtensionStatus= extensionUpdated();		}		fExistsStatus= getExistsStatus();		updateFullTextField();				fContext.statusChanged(StatusUtil.getMostSevere(new IStatus[] { fVariableStatus, fExtensionStatus, fExistsStatus }));	}				private IStatus variableUpdated() {		fVariable= null;				StatusInfo status= new StatusInfo();		String name= fVariableField.getText();		if (name.length() == 0) {			if (!fIsEmptyAllowed) {				status.setError(BeanInfoUIMessages.getString("VariableSelectionBlock.error.entername_ERROR_")); //$NON-NLS-1$			} else {				fVariable= ""; //$NON-NLS-1$			}		} else if (JavaCore.getClasspathVariable(name) == null) {			status.setError(BeanInfoUIMessages.getString("VariableSelectionBlock.error.namenotexists_ERROR_")); //$NON-NLS-1$		} else {			fVariable= name;		}		fExtensionField.enableButton(fVariable != null);		return status;	}		private IStatus extensionUpdated() {		StatusInfo status= new StatusInfo();		String extension= fExtensionField.getText();		if (extension.length() > 0 && !Path.ROOT.isValidPath(extension)) {			status.setError(BeanInfoUIMessages.getString("VariableSelectionBlock.error.invalidextension_ERROR_")); //$NON-NLS-1$		}		return status;	}			private IStatus getExistsStatus() {		StatusInfo status= new StatusInfo();		IPath path= getResolvedPath();		if (path != null) {			if (findPath(path)) {				status.setError(BeanInfoUIMessages.getString("VariableSelectionBlock.error.pathexists_ERROR_")); //$NON-NLS-1$			} else if (!path.toFile().isFile()) {				status.setWarning(BeanInfoUIMessages.getString("VariableSelectionBlock.warning.pathnotexists_WARN_")); //$NON-NLS-1$			}		} else {			status.setWarning(BeanInfoUIMessages.getString("VariableSelectionBlock.warning.pathnotexists_WARN_")); //$NON-NLS-1$		}		return status;	}		private boolean findPath(IPath path) {		for (int i= fExistingPaths.size() -1; i >=0; i--) {			IPath curr= (IPath) fExistingPaths.get(i);			if (curr.equals(path)) {				return true;			}		}		return false;	}		private void updateFullTextField() {		if (fFullPath != null && !fFullPath.isDisposed()) {			IPath resolvedPath= getResolvedPath();			if (resolvedPath != null) {				fFullPath.setText(resolvedPath.toOSString());			} else {				fFullPath.setText(""); //$NON-NLS-1$			}		}	}		private Shell getShell() {		if (fFullPath != null) {			return fFullPath.getShell();		}		return PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();	}			private IPath chooseExtJar() {		String lastUsedPath= ""; //$NON-NLS-1$		IPath entryPath= getResolvedPath();		if (entryPath != null) {			if (ArchiveFileFilter.isArchivePath(entryPath)) {				lastUsedPath= entryPath.removeLastSegments(1).toOSString();			} else {				lastUsedPath= entryPath.toOSString();			}		}				FileDialog dialog= new FileDialog(getShell(), SWT.SINGLE);		dialog.setFilterExtensions(new String[] {"*.jar;*.zip"}); //$NON-NLS-1$		dialog.setFilterPath(lastUsedPath);		dialog.setText(BeanInfoUIMessages.getString("VariableSelectionBlock.ExtJarDialog.title")); //$NON-NLS-1$		String res= dialog.open();		if (res == null) {			return null;		}		IPath resPath= new Path(res).makeAbsolute();		IPath varPath= JavaCore.getClasspathVariable(fVariable);				if (!varPath.isPrefixOf(resPath)) {			return new Path(resPath.lastSegment());		} else {			return resPath.removeFirstSegments(varPath.segmentCount()).setDevice(null);		}	}	private String chooseVariable() {		ChooseVariableDialog dialog= new ChooseVariableDialog(getShell(), fVariable);		if (dialog.open() == Window.OK) {			return dialog.getSelectedVariable();		}				return null;	}		}