core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/ui/wizards/NewSourceFolderWizardPage.java - dltk/org.eclipse.dltk.core - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2017 IBM Corporation and others.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
  * http://www.eclipse.org/legal/epl-2.0.
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  *******************************************************************************/
 package org.eclipse.dltk.ui.wizards;

 import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;

 import org.eclipse.core.filesystem.EFS;
 import org.eclipse.core.filesystem.IFileStore;
 import org.eclipse.core.resources.IFolder;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspaceRoot;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.SubProgressMonitor;
 import org.eclipse.dltk.core.DLTKCore;
 import org.eclipse.dltk.core.DLTKLanguageManager;
 import org.eclipse.dltk.core.IBuildpathEntry;
 import org.eclipse.dltk.core.IModelElement;
 import org.eclipse.dltk.core.IModelStatus;
 import org.eclipse.dltk.core.IProjectFragment;
 import org.eclipse.dltk.core.IScriptProject;
 import org.eclipse.dltk.core.ModelException;
 import org.eclipse.dltk.core.ScriptModelUtil;
 import org.eclipse.dltk.internal.core.BuildpathEntry;
 import org.eclipse.dltk.internal.corext.util.Messages;
 import org.eclipse.dltk.internal.ui.editor.EditorUtility;
 import org.eclipse.dltk.internal.ui.util.CoreUtility;
 import org.eclipse.dltk.internal.ui.wizards.NewWizardMessages;
 import org.eclipse.dltk.internal.ui.wizards.TypedElementSelectionValidator;
 import org.eclipse.dltk.internal.ui.wizards.TypedViewerFilter;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.DialogField;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.IDialogFieldListener;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.IStringButtonAdapter;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.LayoutUtil;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.SelectionButtonDialogField;
 import org.eclipse.dltk.internal.ui.wizards.dialogfields.StringButtonDialogField;
 import org.eclipse.dltk.ui.DLTKUIPlugin;
 import org.eclipse.dltk.ui.ModelElementLabelProvider;
 import org.eclipse.dltk.ui.dialogs.StatusInfo;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITreeContentProvider;
 import org.eclipse.jface.viewers.ViewerFilter;
 import org.eclipse.jface.window.Window;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.ui.dialogs.ElementListSelectionDialog;
 import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
 import org.eclipse.ui.dialogs.ISelectionStatusValidator;
 import org.eclipse.ui.model.WorkbenchContentProvider;
 import org.eclipse.ui.model.WorkbenchLabelProvider;
 import org.eclipse.ui.views.navigator.ResourceComparator;

 public class NewSourceFolderWizardPage extends NewElementWizardPage {

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

 	private StringButtonDialogField fProjectField;
 	private StatusInfo fProjectStatus;

 	private StringButtonDialogField fRootDialogField;
 	private StatusInfo fRootStatus;

 	private SelectionButtonDialogField fExcludeInOthersFields;

 	private IWorkspaceRoot fWorkspaceRoot;

 	private IScriptProject fCurrJProject;
 	private IBuildpathEntry[] fEntries;

 	private IBuildpathEntry[] fNewEntries;

 	private boolean fIsProjectAsSourceFolder;

 	private IProjectFragment fCreatedRoot;

 	public NewSourceFolderWizardPage() {
 		super(PAGE_NAME);

 		setTitle(NewWizardMessages.NewSourceFolderWizardPage_title);
 		setDescription(NewWizardMessages.NewSourceFolderWizardPage_description);

 		fWorkspaceRoot = ResourcesPlugin.getWorkspace().getRoot();

 		RootFieldAdapter adapter = new RootFieldAdapter();

 		fProjectField = new StringButtonDialogField(adapter);
 		fProjectField.setDialogFieldListener(adapter);
 		fProjectField.setLabelText(
 				NewWizardMessages.NewSourceFolderWizardPage_project_label);
 		fProjectField.setButtonLabel(
 				NewWizardMessages.NewSourceFolderWizardPage_project_button);

 		fRootDialogField = new StringButtonDialogField(adapter);
 		fRootDialogField.setDialogFieldListener(adapter);
 		fRootDialogField.setLabelText(
 				NewWizardMessages.NewSourceFolderWizardPage_root_label);
 		fRootDialogField.setButtonLabel(
 				NewWizardMessages.NewSourceFolderWizardPage_root_button);

 		fExcludeInOthersFields = new SelectionButtonDialogField(SWT.CHECK);
 		fExcludeInOthersFields.setDialogFieldListener(adapter);
 		fExcludeInOthersFields.setLabelText(
 				NewWizardMessages.NewSourceFolderWizardPage_exclude_label);

 		fExcludeInOthersFields.setEnabled(DLTKCore.ENABLED.equals(DLTKCore
 				.getOption(DLTKCore.CORE_ENABLE_BUILDPATH_EXCLUSION_PATTERNS)));

 		fRootStatus = new StatusInfo();
 		fProjectStatus = new StatusInfo();
 	}

 	// -------- Initialization ---------

 	public void init(IStructuredSelection selection) {
 		if (selection == null || selection.isEmpty()) {
 			setDefaultAttributes();
 			return;
 		}

 		Object selectedElement = selection.getFirstElement();
 		if (selectedElement == null) {
 			selectedElement = EditorUtility.getActiveEditorModelInput();
 		}

 		String projPath = null;

 		if (selectedElement instanceof IResource) {
 			IProject proj = ((IResource) selectedElement).getProject();
 			if (proj != null) {
 				projPath = proj.getFullPath().makeRelative().toString();
 			}
 		} else if (selectedElement instanceof IModelElement) {
 			IScriptProject jproject = ((IModelElement) selectedElement)
 					.getScriptProject();
 			if (jproject != null) {
 				projPath = jproject.getProject().getFullPath().makeRelative()
 						.toString();
 			}
 		}

 		if (projPath != null) {
 			fProjectField.setText(projPath);
 			fRootDialogField.setText(""); //$NON-NLS-1$
 		} else {
 			setDefaultAttributes();
 		}
 	}

 	private void setDefaultAttributes() {
 		String projPath = ""; //$NON-NLS-1$

 		// find the first script project
 		IProject[] projects = fWorkspaceRoot.getProjects();
 		for (int i = 0; i < projects.length; i++) {
 			IProject proj = projects[i];
 			if (DLTKLanguageManager.hasScriptNature(proj)) {
 				projPath = proj.getFullPath().makeRelative().toString();
 				break;
 			}
 		}
 		fProjectField.setText(projPath);
 		fRootDialogField.setText(""); //$NON-NLS-1$
 	}

 	// -------- UI Creation ---------

 	/*
 	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.
 	 * widgets .Composite)
 	 */
 	@Override
 	public void createControl(Composite parent) {
 		initializeDialogUnits(parent);

 		Composite composite = new Composite(parent, SWT.NONE);

 		GridLayout layout = new GridLayout();
 		layout.numColumns = 3;
 		composite.setLayout(layout);

 		fProjectField.doFillIntoGrid(composite, 3);
 		fRootDialogField.doFillIntoGrid(composite, 3);
 		fExcludeInOthersFields.doFillIntoGrid(composite, 3);

 		int maxFieldWidth = convertWidthInCharsToPixels(40);
 		LayoutUtil.setWidthHint(fProjectField.getTextControl(null),
 				maxFieldWidth);
 		LayoutUtil.setHorizontalGrabbing(fProjectField.getTextControl(null));
 		LayoutUtil.setWidthHint(fRootDialogField.getTextControl(null),
 				maxFieldWidth);

 		setControl(composite);
 		Dialog.applyDialogFont(composite);
 		if (DLTKCore.DEBUG) {
 			System.err.println("Add help support here..."); //$NON-NLS-1$
 		}

 		// PlatformUI.getWorkbench().getHelpSystem().setHelp(composite,
 		// IScriptHelpContextIds.NEW_PACKAGEROOT_WIZARD_PAGE);
 	}

 	/*
 	 * @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
 	 */
 	@Override
 	public void setVisible(boolean visible) {
 		super.setVisible(visible);
 		if (visible) {
 			fRootDialogField.setFocus();
 		}
 	}

 	// -------- ContainerFieldAdapter --------

 	private class RootFieldAdapter
 			implements IStringButtonAdapter, IDialogFieldListener {

 		// -------- IStringButtonAdapter
 		@Override
 		public void changeControlPressed(DialogField field) {
 			packRootChangeControlPressed(field);
 		}

 		// -------- IDialogFieldListener
 		@Override
 		public void dialogFieldChanged(DialogField field) {
 			packRootDialogFieldChanged(field);
 		}
 	}

 	protected void packRootChangeControlPressed(DialogField field) {
 		if (field == fRootDialogField) {
 			IPath initialPath = new Path(fRootDialogField.getText());
 			String title = NewWizardMessages.NewSourceFolderWizardPage_ChooseExistingRootDialog_title;
 			String message = NewWizardMessages.NewSourceFolderWizardPage_ChooseExistingRootDialog_description;
 			IFolder folder = chooseFolder(title, message, initialPath);
 			if (folder != null) {
 				IPath path = folder.getFullPath().removeFirstSegments(1);
 				fRootDialogField.setText(path.toString());
 			}
 		} else if (field == fProjectField) {
 			IScriptProject jproject = chooseProject();
 			if (jproject != null) {
 				IPath path = jproject.getProject().getFullPath().makeRelative();
 				fProjectField.setText(path.toString());
 			}
 		}
 	}

 	protected void packRootDialogFieldChanged(DialogField field) {
 		if (field == fRootDialogField) {
 			updateRootStatus();
 		} else if (field == fProjectField) {
 			updateProjectStatus();
 			updateRootStatus();
 		} else if (field == fExcludeInOthersFields) {
 			updateRootStatus();
 		}
 		updateStatus(new IStatus[] { fProjectStatus, fRootStatus });
 	}

 	private void updateProjectStatus() {
 		fCurrJProject = null;
 		fIsProjectAsSourceFolder = false;

 		String str = fProjectField.getText();
 		if (str.length() == 0) {
 			fProjectStatus.setError(
 					NewWizardMessages.NewSourceFolderWizardPage_error_EnterProjectName);
 			return;
 		}
 		IPath path = new Path(str);
 		if (path.segmentCount() != 1) {
 			fProjectStatus.setError(
 					NewWizardMessages.NewSourceFolderWizardPage_error_InvalidProjectPath);
 			return;
 		}
 		IProject project = fWorkspaceRoot.getProject(path.toString());
 		if (!project.exists()) {
 			fProjectStatus.setError(
 					NewWizardMessages.NewSourceFolderWizardPage_error_ProjectNotExists);
 			return;
 		}
 		try {
 			if (DLTKLanguageManager.hasScriptNature(project)) {
 				fCurrJProject = DLTKCore.create(project);
 				fEntries = fCurrJProject.getRawBuildpath();
 				fProjectStatus.setOK();
 				return;
 			}
 		} catch (CoreException e) {
 			DLTKUIPlugin.log(e);
 			fCurrJProject = null;
 		}
 		fProjectStatus.setError(
 				NewWizardMessages.NewSourceFolderWizardPage_error_NotAScriptProject);
 	}

 	private void updateRootStatus() {
 		fRootDialogField.enableButton(fCurrJProject != null);
 		fIsProjectAsSourceFolder = false;
 		if (fCurrJProject == null) {
 			return;
 		}
 		fRootStatus.setOK();

 		IPath projPath = fCurrJProject.getProject().getFullPath();
 		String str = fRootDialogField.getText();
 		if (str.length() == 0) {
 			fRootStatus.setError(Messages.format(
 					NewWizardMessages.NewSourceFolderWizardPage_error_EnterRootName,
 					fCurrJProject.getProject().getFullPath().toString()));
 		} else {
 			IPath path = projPath.append(str);
 			IStatus validate = fWorkspaceRoot.getWorkspace()
 					.validatePath(path.toString(), IResource.FOLDER);
 			if (validate.matches(IStatus.ERROR)) {
 				fRootStatus.setError(Messages.format(
 						NewWizardMessages.NewSourceFolderWizardPage_error_InvalidRootName,
 						validate.getMessage()));
 			} else {
 				IResource res = fWorkspaceRoot.findMember(path);
 				if (res != null) {
 					if (res.getType() != IResource.FOLDER) {
 						fRootStatus.setError(
 								NewWizardMessages.NewSourceFolderWizardPage_error_NotAFolder);
 						return;
 					}
 				} else {
 					URI projLocation = fCurrJProject.getProject()
 							.getLocationURI();
 					if (projLocation != null) {
 						try {
 							IFileStore store = EFS.getStore(projLocation)
 									.getChild(str);
 							if (store.fetchInfo().exists()) {
 								fRootStatus.setError(
 										NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExistingDifferentCase);
 								return;
 							}
 						} catch (CoreException e) {
 							// we couldn't create the file store. Ignore the
 							// exception
 							// since we can't check if the file exist. Pretend
 							// that it
 							// doesn't.
 						}
 					}
 				}
 				List<IBuildpathEntry> newEntries = new ArrayList<>(
 						fEntries.length + 1);
 				int projectEntryIndex = -1;

 				for (int i = 0; i < fEntries.length; i++) {
 					IBuildpathEntry curr = fEntries[i];
 					if (curr.getEntryKind() == IBuildpathEntry.BPE_SOURCE) {
 						if (path.equals(curr.getPath())) {
 							fRootStatus.setError(
 									NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExisting);
 							return;
 						}
 						if (projPath.equals(curr.getPath())) {
 							projectEntryIndex = i;
 						}
 					}
 					newEntries.add(curr);
 				}

 				IBuildpathEntry newEntry = DLTKCore.newSourceEntry(path);

 				Set<IBuildpathEntry> modified = new HashSet<>();
 				if (fExcludeInOthersFields.isSelected()) {
 					addExclusionPatterns(newEntry, newEntries, modified);
 					IBuildpathEntry entry = DLTKCore.newSourceEntry(path);
 					insertAtEndOfCategory(entry, newEntries);
 				} else {
 					if (projectEntryIndex != -1) {
 						fIsProjectAsSourceFolder = true;
 						newEntries.set(projectEntryIndex, newEntry);
 					} else {
 						IBuildpathEntry entry = DLTKCore.newSourceEntry(path);
 						insertAtEndOfCategory(entry, newEntries);
 					}
 				}

 				fNewEntries = newEntries
 						.toArray(new IBuildpathEntry[newEntries.size()]);

 				IModelStatus status = BuildpathEntry
 						.validateBuildpath(fCurrJProject, fNewEntries);
 				if (!status.isOK()) {
 					fRootStatus.setError(status.getMessage());
 					return;
 				} else if (fIsProjectAsSourceFolder) {
 					fRootStatus.setInfo(
 							NewWizardMessages.NewSourceFolderWizardPage_warning_ReplaceSF);
 					return;
 				}
 				if (!modified.isEmpty()) {
 					fRootStatus.setInfo(Messages.format(
 							NewWizardMessages.NewSourceFolderWizardPage_warning_AddedExclusions,
 							String.valueOf(modified.size())));
 					return;
 				}
 			}
 		}
 	}

 	private void insertAtEndOfCategory(IBuildpathEntry entry,
 			List<IBuildpathEntry> entries) {
 		int length = entries.size();
 		IBuildpathEntry[] elements = entries
 				.toArray(new IBuildpathEntry[length]);
 		int i = 0;
 		while (i < length
 				&& elements[i].getEntryKind() != entry.getEntryKind()) {
 			i++;
 		}
 		if (i < length) {
 			i++;
 			while (i < length
 					&& elements[i].getEntryKind() == entry.getEntryKind()) {
 				i++;
 			}
 			entries.add(i, entry);
 			return;
 		}

 		switch (entry.getEntryKind()) {
 		case IBuildpathEntry.BPE_SOURCE:
 			entries.add(0, entry);
 			break;
 		case IBuildpathEntry.BPE_CONTAINER:
 		case IBuildpathEntry.BPE_LIBRARY:
 		case IBuildpathEntry.BPE_PROJECT:
 		default:
 			entries.add(entry);
 			break;
 		}
 	}

 	private void addExclusionPatterns(IBuildpathEntry newEntry,
 			List<IBuildpathEntry> existing,
 			Set<IBuildpathEntry> modifiedEntries) {
 		IPath entryPath = newEntry.getPath();
 		for (int i = 0; i < existing.size(); i++) {
 			IBuildpathEntry curr = existing.get(i);
 			IPath currPath = curr.getPath();
 			if (curr.getEntryKind() == IBuildpathEntry.BPE_SOURCE
 					&& currPath.isPrefixOf(entryPath)) {
 				IPath[] exclusionFilters = curr.getExclusionPatterns();
 				if (!ScriptModelUtil.isExcludedPath(entryPath,
 						exclusionFilters)) {
 					IPath pathToExclude = entryPath
 							.removeFirstSegments(currPath.segmentCount())
 							.addTrailingSeparator();
 					IPath[] newExclusionFilters = new IPath[exclusionFilters.length
 							+ 1];
 					System.arraycopy(exclusionFilters, 0, newExclusionFilters,
 							0, exclusionFilters.length);
 					newExclusionFilters[exclusionFilters.length] = pathToExclude;

 					IBuildpathEntry updated = DLTKCore.newSourceEntry(currPath,
 							newExclusionFilters);
 					existing.set(i, updated);
 					modifiedEntries.add(updated);
 				}
 			}
 		}
 	}

 	// ---- creation ----------------

 	public IProjectFragment getNewProjectFragment() {
 		return fCreatedRoot;
 	}

 	public IResource getCorrespondingResource() {
 		return fCurrJProject.getProject().getFolder(fRootDialogField.getText());
 	}

 	public void createProjectFragment(IProgressMonitor monitor)
 			throws CoreException, InterruptedException {
 		if (monitor == null) {
 			monitor = new NullProgressMonitor();
 		}
 		monitor.beginTask(NewWizardMessages.NewSourceFolderWizardPage_operation,
 				3);
 		try {
 			// IPath projPath= fCurrJProject.getProject().getFullPath();

 			String relPath = fRootDialogField.getText();

 			IFolder folder = fCurrJProject.getProject().getFolder(relPath);
 			if (!folder.exists()) {
 				CoreUtility.createFolder(folder, true, true,
 						new SubProgressMonitor(monitor, 1));
 			}
 			if (monitor.isCanceled()) {
 				throw new InterruptedException();
 			}

 			fCurrJProject.setRawBuildpath(fNewEntries,
 					new SubProgressMonitor(monitor, 2));

 			fCreatedRoot = fCurrJProject.getProjectFragment(folder);
 		} finally {
 			monitor.done();
 		}
 	}

 	// ------------- choose dialogs

 	private IFolder chooseFolder(String title, String message,
 			IPath initialPath) {
 		Class<?>[] acceptedClasses = new Class[] { IFolder.class };
 		ISelectionStatusValidator validator = new TypedElementSelectionValidator(
 				acceptedClasses, false);
 		ViewerFilter filter = new TypedViewerFilter(acceptedClasses, null);

 		ILabelProvider lp = new WorkbenchLabelProvider();
 		ITreeContentProvider cp = new WorkbenchContentProvider();

 		IProject currProject = fCurrJProject.getProject();

 		ElementTreeSelectionDialog dialog = new ElementTreeSelectionDialog(
 				getShell(), lp, cp);
 		dialog.setValidator(validator);
 		dialog.setTitle(title);
 		dialog.setMessage(message);
 		dialog.addFilter(filter);
 		dialog.setInput(currProject);
 		dialog.setComparator(new ResourceComparator(ResourceComparator.NAME));
 		IResource res = currProject.findMember(initialPath);
 		if (res != null) {
 			dialog.setInitialSelection(res);
 		}

 		if (dialog.open() == Window.OK) {
 			return (IFolder) dialog.getFirstResult();
 		}
 		return null;
 	}

 	private IScriptProject chooseProject() {
 		IScriptProject[] projects;
 		try {
 			projects = DLTKCore.create(fWorkspaceRoot).getScriptProjects();
 		} catch (ModelException e) {
 			DLTKUIPlugin.log(e);
 			projects = new IScriptProject[0];
 		}

 		ILabelProvider labelProvider = new ModelElementLabelProvider(
 				ModelElementLabelProvider.SHOW_DEFAULT);
 		ElementListSelectionDialog dialog = new ElementListSelectionDialog(
 				getShell(), labelProvider);
 		dialog.setTitle(
 				NewWizardMessages.NewSourceFolderWizardPage_ChooseProjectDialog_title);
 		dialog.setMessage(
 				NewWizardMessages.NewSourceFolderWizardPage_ChooseProjectDialog_description);
 		dialog.setElements(projects);
 		dialog.setInitialSelections(new Object[] { fCurrJProject });
 		dialog.setHelpAvailable(false);
 		if (dialog.open() == Window.OK) {
 			return (IScriptProject) dialog.getFirstResult();
 		}
 		return null;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2017 IBM Corporation and others.
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v. 2.0 which is available at
	* http://www.eclipse.org/legal/epl-2.0.
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	*******************************************************************************/
	package org.eclipse.dltk.ui.wizards;

	import java.net.URI;
	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Set;

	import org.eclipse.core.filesystem.EFS;
	import org.eclipse.core.filesystem.IFileStore;
	import org.eclipse.core.resources.IFolder;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IWorkspaceRoot;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.NullProgressMonitor;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.SubProgressMonitor;
	import org.eclipse.dltk.core.DLTKCore;
	import org.eclipse.dltk.core.DLTKLanguageManager;
	import org.eclipse.dltk.core.IBuildpathEntry;
	import org.eclipse.dltk.core.IModelElement;
	import org.eclipse.dltk.core.IModelStatus;
	import org.eclipse.dltk.core.IProjectFragment;
	import org.eclipse.dltk.core.IScriptProject;
	import org.eclipse.dltk.core.ModelException;
	import org.eclipse.dltk.core.ScriptModelUtil;
	import org.eclipse.dltk.internal.core.BuildpathEntry;
	import org.eclipse.dltk.internal.corext.util.Messages;
	import org.eclipse.dltk.internal.ui.editor.EditorUtility;
	import org.eclipse.dltk.internal.ui.util.CoreUtility;
	import org.eclipse.dltk.internal.ui.wizards.NewWizardMessages;
	import org.eclipse.dltk.internal.ui.wizards.TypedElementSelectionValidator;
	import org.eclipse.dltk.internal.ui.wizards.TypedViewerFilter;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.DialogField;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.IDialogFieldListener;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.IStringButtonAdapter;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.LayoutUtil;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.SelectionButtonDialogField;
	import org.eclipse.dltk.internal.ui.wizards.dialogfields.StringButtonDialogField;
	import org.eclipse.dltk.ui.DLTKUIPlugin;
	import org.eclipse.dltk.ui.ModelElementLabelProvider;
	import org.eclipse.dltk.ui.dialogs.StatusInfo;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ITreeContentProvider;
	import org.eclipse.jface.viewers.ViewerFilter;
	import org.eclipse.jface.window.Window;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.ui.dialogs.ElementListSelectionDialog;
	import org.eclipse.ui.dialogs.ElementTreeSelectionDialog;
	import org.eclipse.ui.dialogs.ISelectionStatusValidator;
	import org.eclipse.ui.model.WorkbenchContentProvider;
	import org.eclipse.ui.model.WorkbenchLabelProvider;
	import org.eclipse.ui.views.navigator.ResourceComparator;

	public class NewSourceFolderWizardPage extends NewElementWizardPage {

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

	private StringButtonDialogField fProjectField;
	private StatusInfo fProjectStatus;

	private StringButtonDialogField fRootDialogField;
	private StatusInfo fRootStatus;

	private SelectionButtonDialogField fExcludeInOthersFields;

	private IWorkspaceRoot fWorkspaceRoot;

	private IScriptProject fCurrJProject;
	private IBuildpathEntry[] fEntries;

	private IBuildpathEntry[] fNewEntries;

	private boolean fIsProjectAsSourceFolder;

	private IProjectFragment fCreatedRoot;

	public NewSourceFolderWizardPage() {
	super(PAGE_NAME);

	setTitle(NewWizardMessages.NewSourceFolderWizardPage_title);
	setDescription(NewWizardMessages.NewSourceFolderWizardPage_description);

	fWorkspaceRoot = ResourcesPlugin.getWorkspace().getRoot();

	RootFieldAdapter adapter = new RootFieldAdapter();

	fProjectField = new StringButtonDialogField(adapter);
	fProjectField.setDialogFieldListener(adapter);
	fProjectField.setLabelText(
	NewWizardMessages.NewSourceFolderWizardPage_project_label);
	fProjectField.setButtonLabel(
	NewWizardMessages.NewSourceFolderWizardPage_project_button);

	fRootDialogField = new StringButtonDialogField(adapter);
	fRootDialogField.setDialogFieldListener(adapter);
	fRootDialogField.setLabelText(
	NewWizardMessages.NewSourceFolderWizardPage_root_label);
	fRootDialogField.setButtonLabel(
	NewWizardMessages.NewSourceFolderWizardPage_root_button);

	fExcludeInOthersFields = new SelectionButtonDialogField(SWT.CHECK);
	fExcludeInOthersFields.setDialogFieldListener(adapter);
	fExcludeInOthersFields.setLabelText(
	NewWizardMessages.NewSourceFolderWizardPage_exclude_label);

	fExcludeInOthersFields.setEnabled(DLTKCore.ENABLED.equals(DLTKCore
	.getOption(DLTKCore.CORE_ENABLE_BUILDPATH_EXCLUSION_PATTERNS)));

	fRootStatus = new StatusInfo();
	fProjectStatus = new StatusInfo();
	}

	// -------- Initialization ---------

	public void init(IStructuredSelection selection) {
	if (selection == null \|\| selection.isEmpty()) {
	setDefaultAttributes();
	return;
	}

	Object selectedElement = selection.getFirstElement();
	if (selectedElement == null) {
	selectedElement = EditorUtility.getActiveEditorModelInput();
	}

	String projPath = null;

	if (selectedElement instanceof IResource) {
	IProject proj = ((IResource) selectedElement).getProject();
	if (proj != null) {
	projPath = proj.getFullPath().makeRelative().toString();
	}
	} else if (selectedElement instanceof IModelElement) {
	IScriptProject jproject = ((IModelElement) selectedElement)
	.getScriptProject();
	if (jproject != null) {
	projPath = jproject.getProject().getFullPath().makeRelative()
	.toString();
	}
	}

	if (projPath != null) {
	fProjectField.setText(projPath);
	fRootDialogField.setText(""); //$NON-NLS-1$
	} else {
	setDefaultAttributes();
	}
	}

	private void setDefaultAttributes() {
	String projPath = ""; //$NON-NLS-1$

	// find the first script project
	IProject[] projects = fWorkspaceRoot.getProjects();
	for (int i = 0; i < projects.length; i++) {
	IProject proj = projects[i];
	if (DLTKLanguageManager.hasScriptNature(proj)) {
	projPath = proj.getFullPath().makeRelative().toString();
	break;
	}
	}
	fProjectField.setText(projPath);
	fRootDialogField.setText(""); //$NON-NLS-1$
	}

	// -------- UI Creation ---------

	/*
	* @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.
	* widgets .Composite)
	*/
	@Override
	public void createControl(Composite parent) {
	initializeDialogUnits(parent);

	Composite composite = new Composite(parent, SWT.NONE);

	GridLayout layout = new GridLayout();
	layout.numColumns = 3;
	composite.setLayout(layout);

	fProjectField.doFillIntoGrid(composite, 3);
	fRootDialogField.doFillIntoGrid(composite, 3);
	fExcludeInOthersFields.doFillIntoGrid(composite, 3);

	int maxFieldWidth = convertWidthInCharsToPixels(40);
	LayoutUtil.setWidthHint(fProjectField.getTextControl(null),
	maxFieldWidth);
	LayoutUtil.setHorizontalGrabbing(fProjectField.getTextControl(null));
	LayoutUtil.setWidthHint(fRootDialogField.getTextControl(null),
	maxFieldWidth);

	setControl(composite);
	Dialog.applyDialogFont(composite);
	if (DLTKCore.DEBUG) {
	System.err.println("Add help support here..."); //$NON-NLS-1$
	}

	// PlatformUI.getWorkbench().getHelpSystem().setHelp(composite,
	// IScriptHelpContextIds.NEW_PACKAGEROOT_WIZARD_PAGE);
	}

	/*
	* @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
	*/
	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible) {
	fRootDialogField.setFocus();
	}
	}

	// -------- ContainerFieldAdapter --------

	private class RootFieldAdapter
	implements IStringButtonAdapter, IDialogFieldListener {

	// -------- IStringButtonAdapter
	@Override
	public void changeControlPressed(DialogField field) {
	packRootChangeControlPressed(field);
	}

	// -------- IDialogFieldListener
	@Override
	public void dialogFieldChanged(DialogField field) {
	packRootDialogFieldChanged(field);
	}
	}

	protected void packRootChangeControlPressed(DialogField field) {
	if (field == fRootDialogField) {
	IPath initialPath = new Path(fRootDialogField.getText());
	String title = NewWizardMessages.NewSourceFolderWizardPage_ChooseExistingRootDialog_title;
	String message = NewWizardMessages.NewSourceFolderWizardPage_ChooseExistingRootDialog_description;
	IFolder folder = chooseFolder(title, message, initialPath);
	if (folder != null) {
	IPath path = folder.getFullPath().removeFirstSegments(1);
	fRootDialogField.setText(path.toString());
	}
	} else if (field == fProjectField) {
	IScriptProject jproject = chooseProject();
	if (jproject != null) {
	IPath path = jproject.getProject().getFullPath().makeRelative();
	fProjectField.setText(path.toString());
	}
	}
	}

	protected void packRootDialogFieldChanged(DialogField field) {
	if (field == fRootDialogField) {
	updateRootStatus();
	} else if (field == fProjectField) {
	updateProjectStatus();
	updateRootStatus();
	} else if (field == fExcludeInOthersFields) {
	updateRootStatus();
	}
	updateStatus(new IStatus[] { fProjectStatus, fRootStatus });
	}

	private void updateProjectStatus() {
	fCurrJProject = null;
	fIsProjectAsSourceFolder = false;

	String str = fProjectField.getText();
	if (str.length() == 0) {
	fProjectStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_EnterProjectName);
	return;
	}
	IPath path = new Path(str);
	if (path.segmentCount() != 1) {
	fProjectStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_InvalidProjectPath);
	return;
	}
	IProject project = fWorkspaceRoot.getProject(path.toString());
	if (!project.exists()) {
	fProjectStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_ProjectNotExists);
	return;
	}
	try {
	if (DLTKLanguageManager.hasScriptNature(project)) {
	fCurrJProject = DLTKCore.create(project);
	fEntries = fCurrJProject.getRawBuildpath();
	fProjectStatus.setOK();
	return;
	}
	} catch (CoreException e) {
	DLTKUIPlugin.log(e);
	fCurrJProject = null;
	}
	fProjectStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_NotAScriptProject);
	}

	private void updateRootStatus() {
	fRootDialogField.enableButton(fCurrJProject != null);
	fIsProjectAsSourceFolder = false;
	if (fCurrJProject == null) {
	return;
	}
	fRootStatus.setOK();

	IPath projPath = fCurrJProject.getProject().getFullPath();
	String str = fRootDialogField.getText();
	if (str.length() == 0) {
	fRootStatus.setError(Messages.format(
	NewWizardMessages.NewSourceFolderWizardPage_error_EnterRootName,
	fCurrJProject.getProject().getFullPath().toString()));
	} else {
	IPath path = projPath.append(str);
	IStatus validate = fWorkspaceRoot.getWorkspace()
	.validatePath(path.toString(), IResource.FOLDER);
	if (validate.matches(IStatus.ERROR)) {
	fRootStatus.setError(Messages.format(
	NewWizardMessages.NewSourceFolderWizardPage_error_InvalidRootName,
	validate.getMessage()));
	} else {
	IResource res = fWorkspaceRoot.findMember(path);
	if (res != null) {
	if (res.getType() != IResource.FOLDER) {
	fRootStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_NotAFolder);
	return;
	}
	} else {
	URI projLocation = fCurrJProject.getProject()
	.getLocationURI();
	if (projLocation != null) {
	try {
	IFileStore store = EFS.getStore(projLocation)
	.getChild(str);
	if (store.fetchInfo().exists()) {
	fRootStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExistingDifferentCase);
	return;
	}
	} catch (CoreException e) {
	// we couldn't create the file store. Ignore the
	// exception
	// since we can't check if the file exist. Pretend
	// that it
	// doesn't.
	}
	}
	}
	List<IBuildpathEntry> newEntries = new ArrayList<>(
	fEntries.length + 1);
	int projectEntryIndex = -1;

	for (int i = 0; i < fEntries.length; i++) {
	IBuildpathEntry curr = fEntries[i];
	if (curr.getEntryKind() == IBuildpathEntry.BPE_SOURCE) {
	if (path.equals(curr.getPath())) {
	fRootStatus.setError(
	NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExisting);
	return;
	}
	if (projPath.equals(curr.getPath())) {
	projectEntryIndex = i;
	}
	}
	newEntries.add(curr);
	}

	IBuildpathEntry newEntry = DLTKCore.newSourceEntry(path);

	Set<IBuildpathEntry> modified = new HashSet<>();
	if (fExcludeInOthersFields.isSelected()) {
	addExclusionPatterns(newEntry, newEntries, modified);
	IBuildpathEntry entry = DLTKCore.newSourceEntry(path);
	insertAtEndOfCategory(entry, newEntries);
	} else {
	if (projectEntryIndex != -1) {
	fIsProjectAsSourceFolder = true;
	newEntries.set(projectEntryIndex, newEntry);
	} else {
	IBuildpathEntry entry = DLTKCore.newSourceEntry(path);
	insertAtEndOfCategory(entry, newEntries);
	}
	}

	fNewEntries = newEntries
	.toArray(new IBuildpathEntry[newEntries.size()]);

	IModelStatus status = BuildpathEntry
	.validateBuildpath(fCurrJProject, fNewEntries);
	if (!status.isOK()) {
	fRootStatus.setError(status.getMessage());
	return;
	} else if (fIsProjectAsSourceFolder) {
	fRootStatus.setInfo(
	NewWizardMessages.NewSourceFolderWizardPage_warning_ReplaceSF);
	return;
	}
	if (!modified.isEmpty()) {
	fRootStatus.setInfo(Messages.format(
	NewWizardMessages.NewSourceFolderWizardPage_warning_AddedExclusions,
	String.valueOf(modified.size())));
	return;
	}
	}
	}
	}

	private void insertAtEndOfCategory(IBuildpathEntry entry,
	List<IBuildpathEntry> entries) {
	int length = entries.size();
	IBuildpathEntry[] elements = entries
	.toArray(new IBuildpathEntry[length]);
	int i = 0;
	while (i < length
	&& elements[i].getEntryKind() != entry.getEntryKind()) {
	i++;
	}
	if (i < length) {
	i++;
	while (i < length
	&& elements[i].getEntryKind() == entry.getEntryKind()) {
	i++;
	}
	entries.add(i, entry);
	return;
	}

	switch (entry.getEntryKind()) {
	case IBuildpathEntry.BPE_SOURCE:
	entries.add(0, entry);
	break;
	case IBuildpathEntry.BPE_CONTAINER:
	case IBuildpathEntry.BPE_LIBRARY:
	case IBuildpathEntry.BPE_PROJECT:
	default:
	entries.add(entry);
	break;
	}
	}

	private void addExclusionPatterns(IBuildpathEntry newEntry,
	List<IBuildpathEntry> existing,
	Set<IBuildpathEntry> modifiedEntries) {
	IPath entryPath = newEntry.getPath();
	for (int i = 0; i < existing.size(); i++) {
	IBuildpathEntry curr = existing.get(i);
	IPath currPath = curr.getPath();
	if (curr.getEntryKind() == IBuildpathEntry.BPE_SOURCE
	&& currPath.isPrefixOf(entryPath)) {
	IPath[] exclusionFilters = curr.getExclusionPatterns();
	if (!ScriptModelUtil.isExcludedPath(entryPath,
	exclusionFilters)) {
	IPath pathToExclude = entryPath
	.removeFirstSegments(currPath.segmentCount())
	.addTrailingSeparator();
	IPath[] newExclusionFilters = new IPath[exclusionFilters.length
	+ 1];
	System.arraycopy(exclusionFilters, 0, newExclusionFilters,
	0, exclusionFilters.length);
	newExclusionFilters[exclusionFilters.length] = pathToExclude;

	IBuildpathEntry updated = DLTKCore.newSourceEntry(currPath,
	newExclusionFilters);
	existing.set(i, updated);
	modifiedEntries.add(updated);
	}
	}
	}
	}

	// ---- creation ----------------

	public IProjectFragment getNewProjectFragment() {
	return fCreatedRoot;
	}

	public IResource getCorrespondingResource() {
	return fCurrJProject.getProject().getFolder(fRootDialogField.getText());
	}

	public void createProjectFragment(IProgressMonitor monitor)
	throws CoreException, InterruptedException {
	if (monitor == null) {
	monitor = new NullProgressMonitor();
	}
	monitor.beginTask(NewWizardMessages.NewSourceFolderWizardPage_operation,
	3);
	try {
	// IPath projPath= fCurrJProject.getProject().getFullPath();

	String relPath = fRootDialogField.getText();

	IFolder folder = fCurrJProject.getProject().getFolder(relPath);
	if (!folder.exists()) {
	CoreUtility.createFolder(folder, true, true,
	new SubProgressMonitor(monitor, 1));
	}
	if (monitor.isCanceled()) {
	throw new InterruptedException();
	}

	fCurrJProject.setRawBuildpath(fNewEntries,
	new SubProgressMonitor(monitor, 2));

	fCreatedRoot = fCurrJProject.getProjectFragment(folder);
	} finally {
	monitor.done();
	}
	}

	// ------------- choose dialogs

	private IFolder chooseFolder(String title, String message,
	IPath initialPath) {
	Class<?>[] acceptedClasses = new Class[] { IFolder.class };
	ISelectionStatusValidator validator = new TypedElementSelectionValidator(
	acceptedClasses, false);
	ViewerFilter filter = new TypedViewerFilter(acceptedClasses, null);

	ILabelProvider lp = new WorkbenchLabelProvider();
	ITreeContentProvider cp = new WorkbenchContentProvider();

	IProject currProject = fCurrJProject.getProject();

	ElementTreeSelectionDialog dialog = new ElementTreeSelectionDialog(
	getShell(), lp, cp);
	dialog.setValidator(validator);
	dialog.setTitle(title);
	dialog.setMessage(message);
	dialog.addFilter(filter);
	dialog.setInput(currProject);
	dialog.setComparator(new ResourceComparator(ResourceComparator.NAME));
	IResource res = currProject.findMember(initialPath);
	if (res != null) {
	dialog.setInitialSelection(res);
	}

	if (dialog.open() == Window.OK) {
	return (IFolder) dialog.getFirstResult();
	}
	return null;
	}

	private IScriptProject chooseProject() {
	IScriptProject[] projects;
	try {
	projects = DLTKCore.create(fWorkspaceRoot).getScriptProjects();
	} catch (ModelException e) {
	DLTKUIPlugin.log(e);
	projects = new IScriptProject[0];
	}

	ILabelProvider labelProvider = new ModelElementLabelProvider(
	ModelElementLabelProvider.SHOW_DEFAULT);
	ElementListSelectionDialog dialog = new ElementListSelectionDialog(
	getShell(), labelProvider);
	dialog.setTitle(
	NewWizardMessages.NewSourceFolderWizardPage_ChooseProjectDialog_title);
	dialog.setMessage(
	NewWizardMessages.NewSourceFolderWizardPage_ChooseProjectDialog_description);
	dialog.setElements(projects);
	dialog.setInitialSelections(new Object[] { fCurrJProject });
	dialog.setHelpAvailable(false);
	if (dialog.open() == Window.OK) {
	return (IScriptProject) dialog.getFirstResult();
	}
	return null;
	}

	}