ant/org.eclipse.ant.ui/Ant Tools Support/org/eclipse/ant/internal/ui/preferences/AntClasspathBlock.java - platform/eclipse.platform - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ant.internal.ui.preferences;

 import java.io.File;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.ant.core.IAntClasspathEntry;
 import org.eclipse.ant.internal.core.IAntCoreConstants;
 import org.eclipse.ant.internal.ui.AntUIPlugin;
 import org.eclipse.ant.internal.ui.IAntUIConstants;
 import org.eclipse.ant.internal.ui.IAntUIPreferenceConstants;
 import org.eclipse.ant.internal.ui.launchConfigurations.VariableInputDialog;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.variables.VariablesPlugin;
 import org.eclipse.jdt.ui.wizards.BuildPathDialogAccess;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.MessageDialogWithToggle;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.KeyAdapter;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 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.DirectoryDialog;
 import org.eclipse.swt.widgets.FileDialog;
 import org.eclipse.swt.widgets.Tree;

 public class AntClasspathBlock {

 	private static final String[] TOOLS = new String[] { "tools.jar" }; //$NON-NLS-1$

 	private TreeViewer treeViewer;
 	private AntClasspathContentProvider antContentProvider;

 	private Button upButton;
 	private Button downButton;
 	private Button removeButton;

 	private AntClasspathLabelProvider labelProvider = new AntClasspathLabelProvider(this);
 	private Button addFolderButton;
 	private Button addJARButton;
 	private Button addExternalJARButton;
 	private Button addVariableButton;
 	private Button antHomeButton;

 	private String antHome;

 	private IDialogSettings dialogSettings = AntUIPlugin.getDefault().getDialogSettings();

 	private IAntBlockContainer container;

 	private int validated = 2;

 	private IClasspathEntry currentParent;

 	private SelectionListener selectionListener = new SelectionAdapter() {
 		@Override
 		public void widgetSelected(SelectionEvent e) {
 			Object source = e.getSource();
 			if (source == addJARButton) {
 				addJars();
 			} else if (source == addExternalJARButton) {
 				addExternalJars();
 			} else if (source == addFolderButton) {
 				addFolder();
 			} else if (upButton == source) {
 				handleMoveUp();
 			} else if (downButton == source) {
 				handleMoveDown();
 			} else if (removeButton == source) {
 				remove();
 			} else if (addVariableButton == source) {
 				addVariable();
 			} else if (antHomeButton == source) {
 				browseAntHome();
 			}
 		}
 	};

 	public void setContainer(IAntBlockContainer container) {
 		this.container = container;
 	}

 	private void addButtonsToButtonGroup(Composite parent) {

 		addJARButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_addJarButtonTitle);
 		addJARButton.addSelectionListener(selectionListener);

 		addExternalJARButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_42);
 		addExternalJARButton.addSelectionListener(selectionListener);
 		addFolderButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_addFolderButtonTitle);
 		addFolderButton.addSelectionListener(selectionListener);

 		addVariableButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_2);
 		addVariableButton.addSelectionListener(selectionListener);

 		antHomeButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_30);
 		antHomeButton.addSelectionListener(selectionListener);

 		removeButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_removeButtonTitle);
 		removeButton.addSelectionListener(selectionListener);

 		upButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_upButtonTitle);
 		upButton.addSelectionListener(selectionListener);
 		downButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_downButtonTitle);
 		downButton.addSelectionListener(selectionListener);
 	}

 	/**
 	 * Returns the selected items in the list, in the order they are displayed.
 	 *
 	 * @return targets for an action
 	 */
 	private List<IAntClasspathEntry> getOrderedSelection(IClasspathEntry parent) {
 		List<IAntClasspathEntry> targets = new ArrayList<>();
 		List<?> selection = ((IStructuredSelection) treeViewer.getSelection()).toList();
 		IAntClasspathEntry[] entries = parent.getEntries();
 		for (int i = 0; i < entries.length; i++) {
 			IAntClasspathEntry target = entries[i];
 			if (selection.contains(target)) {
 				targets.add(target);
 			}
 		}
 		return targets;
 	}

 	private void handleMoveDown() {
 		List<IAntClasspathEntry> targets = getOrderedSelection(currentParent);
 		List<IAntClasspathEntry> list = new ArrayList<>(Arrays.asList(currentParent.getEntries()));
 		int bottom = list.size() - 1;
 		int index = 0;
 		for (int i = targets.size() - 1; i >= 0; i--) {
 			IAntClasspathEntry target = targets.get(i);
 			index = list.indexOf(target);
 			if (index < bottom) {
 				bottom = index + 1;
 				IAntClasspathEntry temp = list.get(bottom);
 				list.set(bottom, target);
 				list.set(index, temp);
 			}
 			bottom = index;
 		}
 		finishMove(list);
 	}

 	private void finishMove(List<IAntClasspathEntry> list) {
 		AntClasspathContentProvider viewerContentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
 		viewerContentProvider.setEntries(currentParent, list);
 		treeViewer.refresh();
 		treeViewer.setSelection(treeViewer.getSelection());
 		updateContainer();
 	}

 	private void handleMoveUp() {
 		List<IAntClasspathEntry> targets = getOrderedSelection(currentParent);
 		int top = 0;
 		int index = 0;
 		List<IAntClasspathEntry> list = new ArrayList<>(Arrays.asList(currentParent.getEntries()));
 		Iterator<IAntClasspathEntry> entries = targets.iterator();
 		while (entries.hasNext()) {
 			IAntClasspathEntry target = entries.next();
 			index = list.indexOf(target);
 			if (index > top) {
 				top = index - 1;
 				IAntClasspathEntry temp = list.get(top);
 				list.set(top, target);
 				list.set(index, temp);
 			}
 			top = index;
 		}

 		finishMove(list);
 	}

 	private void remove() {
 		AntClasspathContentProvider viewerContentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
 		IStructuredSelection sel = (IStructuredSelection) treeViewer.getSelection();
 		viewerContentProvider.remove(sel);
 		updateContainer();
 	}

 	/**
 	 * Allows the user to enter a folder as a classpath.
 	 */
 	private void addFolder() {
 		String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTFOLDER);
 		if (lastUsedPath == null) {
 			lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
 		}
 		DirectoryDialog dialog = new DirectoryDialog(treeViewer.getControl().getShell(), SWT.SHEET);
 		dialog.setMessage(AntPreferencesMessages.AntClasspathBlock_1);
 		dialog.setFilterPath(lastUsedPath);
 		String result = dialog.open();
 		if (result != null) {
 			try {
 				URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + result + "/"); //$NON-NLS-1$ ;
 				((AntClasspathContentProvider) treeViewer.getContentProvider()).add(currentParent, url);
 			}
 			catch (MalformedURLException e) {
 				// do nothing
 			}
 		}
 		treeViewer.setSelection(treeViewer.getSelection());
 		dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTFOLDER, result);
 		updateContainer();
 	}

 	private void addExternalJars() {
 		String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTEXTJAR);
 		if (lastUsedPath == null) {
 			lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
 		}
 		FileDialog dialog = new FileDialog(treeViewer.getControl().getShell(), SWT.MULTI | SWT.SHEET);
 		dialog.setFilterExtensions(new String[] { "*.jar;*.zip" }); //$NON-NLS-1$
 		dialog.setFilterPath(lastUsedPath);

 		String result = dialog.open();
 		if (result == null) {
 			return;
 		}
 		IPath filterPath = new Path(dialog.getFilterPath());
 		String[] results = dialog.getFileNames();
 		AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
 		contentProvider.setRefreshEnabled(false);
 		for (int i = 0; i < results.length; i++) {
 			String jarName = results[i];
 			try {
 				IPath path = filterPath.append(jarName).makeAbsolute();
 				URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + path.toOSString());
 				contentProvider.add(currentParent, url);
 			}
 			catch (MalformedURLException e) {
 				// do nothing
 			}
 		}
 		contentProvider.setRefreshEnabled(true);

 		treeViewer.setSelection(treeViewer.getSelection());
 		dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTEXTJAR, filterPath.toOSString());
 		updateContainer();
 	}

 	private void addJars() {
 		List<IAntClasspathEntry> allEntries = new ArrayList<>();
 		if (currentParent != null) {
 			allEntries.addAll(Arrays.asList(currentParent.getEntries()));
 		} else {
 			IAntClasspathEntry[] entries = antContentProvider.getModel().getEntries(ClasspathModel.USER);
 			if (entries != null) {
 				allEntries.addAll(Arrays.asList(entries));
 			}
 		}

 		List<IPath> selectedPaths = new ArrayList<>(allEntries.size());
 		Iterator<IAntClasspathEntry> iterator = allEntries.iterator();
 		while (iterator.hasNext()) {
 			IAntClasspathEntry entry = iterator.next();
 			URL url = entry.getEntryURL();
 			if (url != null) {
 				String file = url.getFile();
 				if (file != null && file.length() > 0) {
 					IFile[] files = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(new Path(file).toFile().toURI());
 					for (int i = 0; i < files.length; i++) {
 						selectedPaths.add(files[i].getFullPath());
 					}
 				}
 			}
 		}

 		IPath[] paths = BuildPathDialogAccess.chooseJAREntries(treeViewer.getControl().getShell(), null, selectedPaths.toArray(new IPath[selectedPaths.size()]));

 		if (paths != null && paths.length > 0) {
 			AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
 			contentProvider.setRefreshEnabled(false);
 			for (int i = 0; i < paths.length; i++) {
 				String varExpression = VariablesPlugin.getDefault().getStringVariableManager().generateVariableExpression("workspace_loc", paths[i].toString()); //$NON-NLS-1$
 				contentProvider.add(currentParent, varExpression);
 			}
 			contentProvider.setRefreshEnabled(true);
 			updateContainer();
 		}
 	}

 	private void updateContainer() {
 		validated = 0;
 		container.update();
 	}

 	/**
 	 * Creates the group which will contain the buttons.
 	 */
 	private void createButtonGroup(Composite top) {
 		Composite buttonGroup = new Composite(top, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		buttonGroup.setLayout(layout);
 		buttonGroup.setLayoutData(new GridData(GridData.FILL_VERTICAL));
 		buttonGroup.setFont(top.getFont());

 		addButtonsToButtonGroup(buttonGroup);
 	}

 	private void createClasspathTree(Composite parent) {
 		Tree tree = new Tree(parent, SWT.MULTI | SWT.FULL_SELECTION | SWT.BORDER);
 		GridData data = new GridData(GridData.FILL_BOTH);
 		data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
 		data.heightHint = tree.getItemHeight();
 		tree.setLayoutData(data);
 		tree.setFont(parent.getFont());

 		tree.addKeyListener(new KeyAdapter() {
 			@Override
 			public void keyPressed(KeyEvent event) {
 				if (event.character == SWT.DEL && event.stateMask == 0) {
 					remove();
 				}
 			}
 		});

 		antContentProvider = new AntClasspathContentProvider();
 		treeViewer = new TreeViewer(tree);
 		treeViewer.setContentProvider(antContentProvider);
 		treeViewer.setLabelProvider(labelProvider);
 		treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			@Override
 			public void selectionChanged(SelectionChangedEvent event) {
 				tableSelectionChanged((IStructuredSelection) event.getSelection(), (AntClasspathContentProvider) treeViewer.getContentProvider());
 			}
 		});
 	}

 	public void createContents(Composite parent) {
 		createClasspathTree(parent);
 		createButtonGroup(parent);

 		tableSelectionChanged((IStructuredSelection) treeViewer.getSelection(), antContentProvider);
 	}

 	private void tableSelectionChanged(IStructuredSelection selection, AntClasspathContentProvider contentProvider) {

 		boolean notEmpty = !selection.isEmpty();
 		boolean first = !notEmpty;
 		boolean last = !notEmpty;
 		boolean canRemove = true;
 		boolean canAdd = notEmpty;
 		boolean canMove = true;
 		if (!resolveCurrentParent(selection)) {
 			// selection contains elements from multiple parents
 			canAdd = false;
 			canMove = false;
 			canRemove = false;
 		} else {
 			Iterator<?> selected = selection.iterator();
 			while (selected.hasNext()) {
 				IClasspathEntry element = (IClasspathEntry) selected.next();

 				if (element instanceof GlobalClasspathEntries) {
 					GlobalClasspathEntries global = (GlobalClasspathEntries) element;
 					canRemove = global.canBeRemoved();
 					canAdd = global.getType() != ClasspathModel.CONTRIBUTED;
 					canMove = false;
 				}
 				IClasspathEntry parent = element.getParent();
 				if (parent instanceof GlobalClasspathEntries) {
 					canAdd = ((GlobalClasspathEntries) parent).getType() != ClasspathModel.CONTRIBUTED;
 					canRemove = canAdd;
 					canMove = canAdd;
 				}
 				Object[] childEntries = contentProvider.getChildren(parent);
 				List<Object> entries = Arrays.asList(childEntries);
 				int lastEntryIndex = entries.size() - 1;
 				if (!first && entries.indexOf(element) == 0) {
 					first = true;
 				}
 				if (!last && entries.indexOf(element) == lastEntryIndex) {
 					last = true;
 				}
 			}
 		}

 		addJARButton.setEnabled(canAdd);
 		addExternalJARButton.setEnabled(canAdd);
 		addFolderButton.setEnabled(canAdd);
 		addVariableButton.setEnabled(canAdd);
 		removeButton.setEnabled(notEmpty && canRemove);
 		upButton.setEnabled(canMove && !first);
 		downButton.setEnabled(canMove && !last);
 	}

 	private boolean resolveCurrentParent(IStructuredSelection selection) {
 		currentParent = null;
 		Iterator<?> selected = selection.iterator();

 		while (selected.hasNext()) {
 			Object element = selected.next();
 			if (element instanceof ClasspathEntry) {
 				IClasspathEntry parent = ((IClasspathEntry) element).getParent();
 				if (currentParent != null) {
 					if (!currentParent.equals(parent)) {
 						return false;
 					}
 				} else {
 					currentParent = parent;
 				}
 			} else {
 				if (currentParent != null) {
 					if (!currentParent.equals(element)) {
 						return false;
 					}
 				} else {
 					currentParent = (IClasspathEntry) element;
 				}
 			}
 		}
 		return true;
 	}

 	private File validateAntHome(String path) {
 		File rootDir = null;
 		boolean invalid = true;
 		if (path.length() > 0) {
 			rootDir = new File(path, "lib"); //$NON-NLS-1$
 			File parentDir = rootDir.getParentFile();
 			if (parentDir == null || !parentDir.exists()) {
 				container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_56);
 			} else if (!rootDir.exists()) {
 				container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_7);
 			} else {
 				invalid = false;
 			}
 		} else {
 			container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_57);
 		}
 		if (invalid) {
 			setValidated();
 			return null;
 		}
 		container.setErrorMessage(null);
 		return rootDir;
 	}

 	private void browseAntHome() {
 		String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTANTHOME);
 		if (lastUsedPath == null) {
 			lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
 		}
 		DirectoryDialog dialog = new DirectoryDialog(treeViewer.getControl().getShell(), SWT.SHEET);
 		dialog.setMessage(AntPreferencesMessages.AntClasspathBlock_3);
 		dialog.setFilterPath(lastUsedPath);
 		String path = dialog.open();
 		if (path == null) {
 			return;
 		}
 		antHome = path;
 		if (path.length() > 0) {
 			File rootDir = new File(path, "lib"); //$NON-NLS-1$
 			setAntHome(rootDir);
 		} else {
 			updateContainer();
 		}
 		dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTANTHOME, path);
 	}

 	private void setAntHome(File rootDir) {
 		AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
 		contentProvider.setRefreshEnabled(false);
 		contentProvider.removeAllGlobalAntClasspathEntries();
 		String[] names = rootDir.list();
 		if (names != null) {
 			Arrays.sort(names);
 			for (int i = 0; i < names.length; i++) {
 				File file = new File(rootDir, names[i]);
 				if (file.isFile() && file.getPath().endsWith(".jar")) { //$NON-NLS-1$
 					try {
 						URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + file.getAbsolutePath());
 						contentProvider.add(ClasspathModel.ANT_HOME, url);
 					}
 					catch (MalformedURLException e) {
 						// do nothing
 					}
 				}
 			}
 		}

 		contentProvider.setRefreshEnabled(true);
 		updateContainer();
 	}

 	public String getAntHome() {
 		return antHome;
 	}

 	public void initializeAntHome(String antHomeString) {
 		antHome = antHomeString;
 	}

 	public void setInput(ClasspathModel model) {
 		treeViewer.setInput(model);
 		validated = 0;
 	}

 	public boolean validateAntHome() {
 		validated++;
 		return validateAntHome(antHome) != null;
 	}

 	public Image getClasspathImage() {
 		return labelProvider.getClasspathImage();
 	}

 	public boolean validateToolsJAR() {
 		validated++;
 		boolean check = AntUIPlugin.getDefault().getPreferenceStore().getBoolean(IAntUIPreferenceConstants.ANT_TOOLS_JAR_WARNING);
 		if (check && !AntUIPlugin.isMacOS()) {
 			Object[] entries = antContentProvider.getModel().getEntries(ClasspathModel.ANT_HOME);
 			boolean valid = !JARPresent(entries, TOOLS).isEmpty();
 			if (!valid) {
 				entries = antContentProvider.getModel().getEntries(ClasspathModel.GLOBAL_USER);
 				valid = !JARPresent(entries, TOOLS).isEmpty();
 				if (!valid) {
 					entries = antContentProvider.getModel().getEntries(ClasspathModel.USER);
 					valid = !JARPresent(entries, TOOLS).isEmpty();
 					if (!valid) {
 						MessageDialogWithToggle dialog = MessageDialogWithToggle.openYesNoQuestion(AntUIPlugin.getActiveWorkbenchWindow().getShell(), AntPreferencesMessages.AntClasspathBlock_31, AntPreferencesMessages.AntClasspathBlock_32, AntPreferencesMessages.AntClasspathBlock_33, false, AntUIPlugin.getDefault().getPreferenceStore(), IAntUIPreferenceConstants.ANT_TOOLS_JAR_WARNING);
 						valid = dialog.getReturnCode() == IDialogConstants.YES_ID;
 					}
 				}
 			}
 			if (!valid) {
 				container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_34);
 				setValidated();
 			}
 			return valid;
 		}
 		return true;
 	}

 	private List<String> JARPresent(Object[] classpathEntries, String[] suffixes) {
 		if (classpathEntries == null) {
 			return Collections.EMPTY_LIST;
 		}
 		List<String> found = new ArrayList<>(2);
 		for (int i = 0; i < classpathEntries.length; i++) {
 			String file;
 			Object entry = classpathEntries[i];
 			if (entry instanceof URL) {
 				file = ((URL) entry).getFile();
 			} else {
 				file = entry.toString();
 			}
 			for (int j = 0; j < suffixes.length; j++) {
 				String suffix = suffixes[j];
 				if (file.endsWith(suffix)) {
 					found.add(suffix);
 				}
 			}
 		}
 		return found;
 	}

 	public boolean isValidated() {
 		return validated >= 2;
 	}

 	public void setValidated() {
 		validated = 2;
 	}

 	private void addVariable() {
 		VariableInputDialog inputDialog = new VariableInputDialog(treeViewer.getControl().getShell());
 		inputDialog.open();
 		String variableString = inputDialog.getVariableString();
 		if (variableString != null && variableString.trim().length() > 0) {
 			((AntClasspathContentProvider) treeViewer.getContentProvider()).add(currentParent, variableString);
 			treeViewer.setSelection(treeViewer.getSelection());
 			updateContainer();
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ant.internal.ui.preferences;

	import java.io.File;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.ant.core.IAntClasspathEntry;
	import org.eclipse.ant.internal.core.IAntCoreConstants;
	import org.eclipse.ant.internal.ui.AntUIPlugin;
	import org.eclipse.ant.internal.ui.IAntUIConstants;
	import org.eclipse.ant.internal.ui.IAntUIPreferenceConstants;
	import org.eclipse.ant.internal.ui.launchConfigurations.VariableInputDialog;
	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.variables.VariablesPlugin;
	import org.eclipse.jdt.ui.wizards.BuildPathDialogAccess;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.dialogs.MessageDialogWithToggle;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.KeyAdapter;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	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.DirectoryDialog;
	import org.eclipse.swt.widgets.FileDialog;
	import org.eclipse.swt.widgets.Tree;

	public class AntClasspathBlock {

	private static final String[] TOOLS = new String[] { "tools.jar" }; //$NON-NLS-1$

	private TreeViewer treeViewer;
	private AntClasspathContentProvider antContentProvider;

	private Button upButton;
	private Button downButton;
	private Button removeButton;

	private AntClasspathLabelProvider labelProvider = new AntClasspathLabelProvider(this);
	private Button addFolderButton;
	private Button addJARButton;
	private Button addExternalJARButton;
	private Button addVariableButton;
	private Button antHomeButton;

	private String antHome;

	private IDialogSettings dialogSettings = AntUIPlugin.getDefault().getDialogSettings();

	private IAntBlockContainer container;

	private int validated = 2;

	private IClasspathEntry currentParent;

	private SelectionListener selectionListener = new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	Object source = e.getSource();
	if (source == addJARButton) {
	addJars();
	} else if (source == addExternalJARButton) {
	addExternalJars();
	} else if (source == addFolderButton) {
	addFolder();
	} else if (upButton == source) {
	handleMoveUp();
	} else if (downButton == source) {
	handleMoveDown();
	} else if (removeButton == source) {
	remove();
	} else if (addVariableButton == source) {
	addVariable();
	} else if (antHomeButton == source) {
	browseAntHome();
	}
	}
	};

	public void setContainer(IAntBlockContainer container) {
	this.container = container;
	}

	private void addButtonsToButtonGroup(Composite parent) {

	addJARButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_addJarButtonTitle);
	addJARButton.addSelectionListener(selectionListener);

	addExternalJARButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_42);
	addExternalJARButton.addSelectionListener(selectionListener);
	addFolderButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_addFolderButtonTitle);
	addFolderButton.addSelectionListener(selectionListener);

	addVariableButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_2);
	addVariableButton.addSelectionListener(selectionListener);

	antHomeButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_30);
	antHomeButton.addSelectionListener(selectionListener);

	removeButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_removeButtonTitle);
	removeButton.addSelectionListener(selectionListener);

	upButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_upButtonTitle);
	upButton.addSelectionListener(selectionListener);
	downButton = container.createPushButton(parent, AntPreferencesMessages.AntClasspathBlock_downButtonTitle);
	downButton.addSelectionListener(selectionListener);
	}

	/**
	* Returns the selected items in the list, in the order they are displayed.
	*
	* @return targets for an action
	*/
	private List<IAntClasspathEntry> getOrderedSelection(IClasspathEntry parent) {
	List<IAntClasspathEntry> targets = new ArrayList<>();
	List<?> selection = ((IStructuredSelection) treeViewer.getSelection()).toList();
	IAntClasspathEntry[] entries = parent.getEntries();
	for (int i = 0; i < entries.length; i++) {
	IAntClasspathEntry target = entries[i];
	if (selection.contains(target)) {
	targets.add(target);
	}
	}
	return targets;
	}

	private void handleMoveDown() {
	List<IAntClasspathEntry> targets = getOrderedSelection(currentParent);
	List<IAntClasspathEntry> list = new ArrayList<>(Arrays.asList(currentParent.getEntries()));
	int bottom = list.size() - 1;
	int index = 0;
	for (int i = targets.size() - 1; i >= 0; i--) {
	IAntClasspathEntry target = targets.get(i);
	index = list.indexOf(target);
	if (index < bottom) {
	bottom = index + 1;
	IAntClasspathEntry temp = list.get(bottom);
	list.set(bottom, target);
	list.set(index, temp);
	}
	bottom = index;
	}
	finishMove(list);
	}

	private void finishMove(List<IAntClasspathEntry> list) {
	AntClasspathContentProvider viewerContentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
	viewerContentProvider.setEntries(currentParent, list);
	treeViewer.refresh();
	treeViewer.setSelection(treeViewer.getSelection());
	updateContainer();
	}

	private void handleMoveUp() {
	List<IAntClasspathEntry> targets = getOrderedSelection(currentParent);
	int top = 0;
	int index = 0;
	List<IAntClasspathEntry> list = new ArrayList<>(Arrays.asList(currentParent.getEntries()));
	Iterator<IAntClasspathEntry> entries = targets.iterator();
	while (entries.hasNext()) {
	IAntClasspathEntry target = entries.next();
	index = list.indexOf(target);
	if (index > top) {
	top = index - 1;
	IAntClasspathEntry temp = list.get(top);
	list.set(top, target);
	list.set(index, temp);
	}
	top = index;
	}

	finishMove(list);
	}

	private void remove() {
	AntClasspathContentProvider viewerContentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
	IStructuredSelection sel = (IStructuredSelection) treeViewer.getSelection();
	viewerContentProvider.remove(sel);
	updateContainer();
	}

	/**
	* Allows the user to enter a folder as a classpath.
	*/
	private void addFolder() {
	String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTFOLDER);
	if (lastUsedPath == null) {
	lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
	}
	DirectoryDialog dialog = new DirectoryDialog(treeViewer.getControl().getShell(), SWT.SHEET);
	dialog.setMessage(AntPreferencesMessages.AntClasspathBlock_1);
	dialog.setFilterPath(lastUsedPath);
	String result = dialog.open();
	if (result != null) {
	try {
	URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + result + "/"); //$NON-NLS-1$ ;
	((AntClasspathContentProvider) treeViewer.getContentProvider()).add(currentParent, url);
	}
	catch (MalformedURLException e) {
	// do nothing
	}
	}
	treeViewer.setSelection(treeViewer.getSelection());
	dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTFOLDER, result);
	updateContainer();
	}

	private void addExternalJars() {
	String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTEXTJAR);
	if (lastUsedPath == null) {
	lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
	}
	FileDialog dialog = new FileDialog(treeViewer.getControl().getShell(), SWT.MULTI \| SWT.SHEET);
	dialog.setFilterExtensions(new String[] { ".jar;.zip" }); //$NON-NLS-1$
	dialog.setFilterPath(lastUsedPath);

	String result = dialog.open();
	if (result == null) {
	return;
	}
	IPath filterPath = new Path(dialog.getFilterPath());
	String[] results = dialog.getFileNames();
	AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
	contentProvider.setRefreshEnabled(false);
	for (int i = 0; i < results.length; i++) {
	String jarName = results[i];
	try {
	IPath path = filterPath.append(jarName).makeAbsolute();
	URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + path.toOSString());
	contentProvider.add(currentParent, url);
	}
	catch (MalformedURLException e) {
	// do nothing
	}
	}
	contentProvider.setRefreshEnabled(true);

	treeViewer.setSelection(treeViewer.getSelection());
	dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTEXTJAR, filterPath.toOSString());
	updateContainer();
	}

	private void addJars() {
	List<IAntClasspathEntry> allEntries = new ArrayList<>();
	if (currentParent != null) {
	allEntries.addAll(Arrays.asList(currentParent.getEntries()));
	} else {
	IAntClasspathEntry[] entries = antContentProvider.getModel().getEntries(ClasspathModel.USER);
	if (entries != null) {
	allEntries.addAll(Arrays.asList(entries));
	}
	}

	List<IPath> selectedPaths = new ArrayList<>(allEntries.size());
	Iterator<IAntClasspathEntry> iterator = allEntries.iterator();
	while (iterator.hasNext()) {
	IAntClasspathEntry entry = iterator.next();
	URL url = entry.getEntryURL();
	if (url != null) {
	String file = url.getFile();
	if (file != null && file.length() > 0) {
	IFile[] files = ResourcesPlugin.getWorkspace().getRoot().findFilesForLocationURI(new Path(file).toFile().toURI());
	for (int i = 0; i < files.length; i++) {
	selectedPaths.add(files[i].getFullPath());
	}
	}
	}
	}

	IPath[] paths = BuildPathDialogAccess.chooseJAREntries(treeViewer.getControl().getShell(), null, selectedPaths.toArray(new IPath[selectedPaths.size()]));

	if (paths != null && paths.length > 0) {
	AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
	contentProvider.setRefreshEnabled(false);
	for (int i = 0; i < paths.length; i++) {
	String varExpression = VariablesPlugin.getDefault().getStringVariableManager().generateVariableExpression("workspace_loc", paths[i].toString()); //$NON-NLS-1$
	contentProvider.add(currentParent, varExpression);
	}
	contentProvider.setRefreshEnabled(true);
	updateContainer();
	}
	}

	private void updateContainer() {
	validated = 0;
	container.update();
	}

	/**
	* Creates the group which will contain the buttons.
	*/
	private void createButtonGroup(Composite top) {
	Composite buttonGroup = new Composite(top, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	buttonGroup.setLayout(layout);
	buttonGroup.setLayoutData(new GridData(GridData.FILL_VERTICAL));
	buttonGroup.setFont(top.getFont());

	addButtonsToButtonGroup(buttonGroup);
	}

	private void createClasspathTree(Composite parent) {
	Tree tree = new Tree(parent, SWT.MULTI \| SWT.FULL_SELECTION \| SWT.BORDER);
	GridData data = new GridData(GridData.FILL_BOTH);
	data.widthHint = IDialogConstants.ENTRY_FIELD_WIDTH;
	data.heightHint = tree.getItemHeight();
	tree.setLayoutData(data);
	tree.setFont(parent.getFont());

	tree.addKeyListener(new KeyAdapter() {
	@Override
	public void keyPressed(KeyEvent event) {
	if (event.character == SWT.DEL && event.stateMask == 0) {
	remove();
	}
	}
	});

	antContentProvider = new AntClasspathContentProvider();
	treeViewer = new TreeViewer(tree);
	treeViewer.setContentProvider(antContentProvider);
	treeViewer.setLabelProvider(labelProvider);
	treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
	@Override
	public void selectionChanged(SelectionChangedEvent event) {
	tableSelectionChanged((IStructuredSelection) event.getSelection(), (AntClasspathContentProvider) treeViewer.getContentProvider());
	}
	});
	}

	public void createContents(Composite parent) {
	createClasspathTree(parent);
	createButtonGroup(parent);

	tableSelectionChanged((IStructuredSelection) treeViewer.getSelection(), antContentProvider);
	}

	private void tableSelectionChanged(IStructuredSelection selection, AntClasspathContentProvider contentProvider) {

	boolean notEmpty = !selection.isEmpty();
	boolean first = !notEmpty;
	boolean last = !notEmpty;
	boolean canRemove = true;
	boolean canAdd = notEmpty;
	boolean canMove = true;
	if (!resolveCurrentParent(selection)) {
	// selection contains elements from multiple parents
	canAdd = false;
	canMove = false;
	canRemove = false;
	} else {
	Iterator<?> selected = selection.iterator();
	while (selected.hasNext()) {
	IClasspathEntry element = (IClasspathEntry) selected.next();

	if (element instanceof GlobalClasspathEntries) {
	GlobalClasspathEntries global = (GlobalClasspathEntries) element;
	canRemove = global.canBeRemoved();
	canAdd = global.getType() != ClasspathModel.CONTRIBUTED;
	canMove = false;
	}
	IClasspathEntry parent = element.getParent();
	if (parent instanceof GlobalClasspathEntries) {
	canAdd = ((GlobalClasspathEntries) parent).getType() != ClasspathModel.CONTRIBUTED;
	canRemove = canAdd;
	canMove = canAdd;
	}
	Object[] childEntries = contentProvider.getChildren(parent);
	List<Object> entries = Arrays.asList(childEntries);
	int lastEntryIndex = entries.size() - 1;
	if (!first && entries.indexOf(element) == 0) {
	first = true;
	}
	if (!last && entries.indexOf(element) == lastEntryIndex) {
	last = true;
	}
	}
	}

	addJARButton.setEnabled(canAdd);
	addExternalJARButton.setEnabled(canAdd);
	addFolderButton.setEnabled(canAdd);
	addVariableButton.setEnabled(canAdd);
	removeButton.setEnabled(notEmpty && canRemove);
	upButton.setEnabled(canMove && !first);
	downButton.setEnabled(canMove && !last);
	}

	private boolean resolveCurrentParent(IStructuredSelection selection) {
	currentParent = null;
	Iterator<?> selected = selection.iterator();

	while (selected.hasNext()) {
	Object element = selected.next();
	if (element instanceof ClasspathEntry) {
	IClasspathEntry parent = ((IClasspathEntry) element).getParent();
	if (currentParent != null) {
	if (!currentParent.equals(parent)) {
	return false;
	}
	} else {
	currentParent = parent;
	}
	} else {
	if (currentParent != null) {
	if (!currentParent.equals(element)) {
	return false;
	}
	} else {
	currentParent = (IClasspathEntry) element;
	}
	}
	}
	return true;
	}

	private File validateAntHome(String path) {
	File rootDir = null;
	boolean invalid = true;
	if (path.length() > 0) {
	rootDir = new File(path, "lib"); //$NON-NLS-1$
	File parentDir = rootDir.getParentFile();
	if (parentDir == null \|\| !parentDir.exists()) {
	container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_56);
	} else if (!rootDir.exists()) {
	container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_7);
	} else {
	invalid = false;
	}
	} else {
	container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_57);
	}
	if (invalid) {
	setValidated();
	return null;
	}
	container.setErrorMessage(null);
	return rootDir;
	}

	private void browseAntHome() {
	String lastUsedPath = dialogSettings.get(IAntUIConstants.DIALOGSTORE_LASTANTHOME);
	if (lastUsedPath == null) {
	lastUsedPath = ResourcesPlugin.getWorkspace().getRoot().getLocation().toOSString();
	}
	DirectoryDialog dialog = new DirectoryDialog(treeViewer.getControl().getShell(), SWT.SHEET);
	dialog.setMessage(AntPreferencesMessages.AntClasspathBlock_3);
	dialog.setFilterPath(lastUsedPath);
	String path = dialog.open();
	if (path == null) {
	return;
	}
	antHome = path;
	if (path.length() > 0) {
	File rootDir = new File(path, "lib"); //$NON-NLS-1$
	setAntHome(rootDir);
	} else {
	updateContainer();
	}
	dialogSettings.put(IAntUIConstants.DIALOGSTORE_LASTANTHOME, path);
	}

	private void setAntHome(File rootDir) {
	AntClasspathContentProvider contentProvider = (AntClasspathContentProvider) treeViewer.getContentProvider();
	contentProvider.setRefreshEnabled(false);
	contentProvider.removeAllGlobalAntClasspathEntries();
	String[] names = rootDir.list();
	if (names != null) {
	Arrays.sort(names);
	for (int i = 0; i < names.length; i++) {
	File file = new File(rootDir, names[i]);
	if (file.isFile() && file.getPath().endsWith(".jar")) { //$NON-NLS-1$
	try {
	URL url = new URL(IAntCoreConstants.FILE_PROTOCOL + file.getAbsolutePath());
	contentProvider.add(ClasspathModel.ANT_HOME, url);
	}
	catch (MalformedURLException e) {
	// do nothing
	}
	}
	}
	}

	contentProvider.setRefreshEnabled(true);
	updateContainer();
	}

	public String getAntHome() {
	return antHome;
	}

	public void initializeAntHome(String antHomeString) {
	antHome = antHomeString;
	}

	public void setInput(ClasspathModel model) {
	treeViewer.setInput(model);
	validated = 0;
	}

	public boolean validateAntHome() {
	validated++;
	return validateAntHome(antHome) != null;
	}

	public Image getClasspathImage() {
	return labelProvider.getClasspathImage();
	}

	public boolean validateToolsJAR() {
	validated++;
	boolean check = AntUIPlugin.getDefault().getPreferenceStore().getBoolean(IAntUIPreferenceConstants.ANT_TOOLS_JAR_WARNING);
	if (check && !AntUIPlugin.isMacOS()) {
	Object[] entries = antContentProvider.getModel().getEntries(ClasspathModel.ANT_HOME);
	boolean valid = !JARPresent(entries, TOOLS).isEmpty();
	if (!valid) {
	entries = antContentProvider.getModel().getEntries(ClasspathModel.GLOBAL_USER);
	valid = !JARPresent(entries, TOOLS).isEmpty();
	if (!valid) {
	entries = antContentProvider.getModel().getEntries(ClasspathModel.USER);
	valid = !JARPresent(entries, TOOLS).isEmpty();
	if (!valid) {
	MessageDialogWithToggle dialog = MessageDialogWithToggle.openYesNoQuestion(AntUIPlugin.getActiveWorkbenchWindow().getShell(), AntPreferencesMessages.AntClasspathBlock_31, AntPreferencesMessages.AntClasspathBlock_32, AntPreferencesMessages.AntClasspathBlock_33, false, AntUIPlugin.getDefault().getPreferenceStore(), IAntUIPreferenceConstants.ANT_TOOLS_JAR_WARNING);
	valid = dialog.getReturnCode() == IDialogConstants.YES_ID;
	}
	}
	}
	if (!valid) {
	container.setErrorMessage(AntPreferencesMessages.AntClasspathBlock_34);
	setValidated();
	}
	return valid;
	}
	return true;
	}

	private List<String> JARPresent(Object[] classpathEntries, String[] suffixes) {
	if (classpathEntries == null) {
	return Collections.EMPTY_LIST;
	}
	List<String> found = new ArrayList<>(2);
	for (int i = 0; i < classpathEntries.length; i++) {
	String file;
	Object entry = classpathEntries[i];
	if (entry instanceof URL) {
	file = ((URL) entry).getFile();
	} else {
	file = entry.toString();
	}
	for (int j = 0; j < suffixes.length; j++) {
	String suffix = suffixes[j];
	if (file.endsWith(suffix)) {
	found.add(suffix);
	}
	}
	}
	return found;
	}

	public boolean isValidated() {
	return validated >= 2;
	}

	public void setValidated() {
	validated = 2;
	}

	private void addVariable() {
	VariableInputDialog inputDialog = new VariableInputDialog(treeViewer.getControl().getShell());
	inputDialog.open();
	String variableString = inputDialog.getVariableString();
	if (variableString != null && variableString.trim().length() > 0) {
	((AntClasspathContentProvider) treeViewer.getContentProvider()).add(currentParent, variableString);
	treeViewer.setSelection(treeViewer.getSelection());
	updateContainer();
	}
	}
	}