org.eclipse.jdt.ui/ui refactoring/org/eclipse/jdt/internal/ui/refactoring/PushDownInputPage.java - jdt/eclipse.jdt.ui - Git at Google

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

 import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;

 import org.eclipse.core.runtime.IProgressMonitor;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 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.Item;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.operation.IRunnableWithProgress;
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.CellEditor;
 import org.eclipse.jface.viewers.CheckStateChangedEvent;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.ComboBoxCellEditor;
 import org.eclipse.jface.viewers.DoubleClickEvent;
 import org.eclipse.jface.viewers.ICellModifier;
 import org.eclipse.jface.viewers.ICheckStateListener;
 import org.eclipse.jface.viewers.IDoubleClickListener;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TableLayout;

 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.help.WorkbenchHelp;

 import org.eclipse.jdt.core.JavaModelException;

 import org.eclipse.jdt.ui.JavaElementLabelProvider;

 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
 import org.eclipse.jdt.internal.ui.util.SWTUtil;
 import org.eclipse.jdt.internal.ui.util.TableLayoutComposite;

 import org.eclipse.jdt.internal.corext.Assert;
 import org.eclipse.jdt.internal.corext.refactoring.structure.PushDownRefactoring;
 import org.eclipse.jdt.internal.corext.refactoring.structure.PushDownRefactoring.MemberActionInfo;

 class PushDownInputPage extends UserInputWizardPage {

 	private class PullUpCellModifier implements ICellModifier {
 		/*
 		 * @see org.eclipse.jface.viewers.ICellModifier#getValue(java.lang.Object, java.lang.String)
 		 */
 		public Object getValue(Object element, String property) {
 			if (! ACTION_PROPERTY.equals(property))
 				return null;

 			MemberActionInfo mac= (MemberActionInfo)element;
 			return new Integer(mac.getAction());
 		}
 		/*
 		 * @see org.eclipse.jface.viewers.ICellModifier#canModify(java.lang.Object, java.lang.String)
 		 */
 		public boolean canModify(Object element, String property) {
 			if (! ACTION_PROPERTY.equals(property))
 				return false;
 			return ((MemberActionInfo)element).isEditable();
 		}
 		/*
 		 * @see org.eclipse.jface.viewers.ICellModifier#modify(java.lang.Object, java.lang.String, java.lang.Object)
 		 */
 		public void modify(Object element, String property, Object value) {
 			if (! ACTION_PROPERTY.equals(property))
 				return;

 			int action= ((Integer)value).intValue();
 			MemberActionInfo mac;
 			if (element instanceof Item) {
 				mac= (MemberActionInfo)((Item)element).getData();
 			} else
 				mac= (MemberActionInfo)element;
 			mac.setAction(action);
 			PushDownInputPage.this.updateUIElements(null);
 		}
 	}

 	private static class MemberActionInfoLabelProvider extends LabelProvider implements ITableLabelProvider {
 		private final ILabelProvider fJavaElementLabelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT | JavaElementLabelProvider.SHOW_SMALL_ICONS);

 		/*
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object, int)
 		 */
 		public String getColumnText(Object element, int columnIndex) {
 			MemberActionInfo mac= (MemberActionInfo)element;
 			switch (columnIndex) {
 				case MEMBER_COLUMN :	return fJavaElementLabelProvider.getText(mac.getMember());
 				case ACTION_COLUMN :	return getActionLabel(mac);
 				default :
 					Assert.isTrue(false);
 					return null;
 			}
 		}

 		static String[] getAvailableActionLabels(MemberActionInfo mac){
 			int[] actions= mac.getAvailableActions();
 			String[] result= new String[actions.length];
 			for(int i= 0; i < actions.length; i++){
 				result[i]= getActionLabel(actions[i]);
 			}
 			return result;
 		}

 		static String getActionLabel(MemberActionInfo mac) {
 			return getActionLabel(mac.getAction());
 		}

 		static String getActionLabel(int action) {
 			switch(action){
 				case MemberActionInfo.NO_ACTION: 				return ""; //$NON-NLS-1$
 				case MemberActionInfo.PUSH_ABSTRACT_ACTION:	return RefactoringMessages.getString("PushDownInputPage.leave_abstract"); //$NON-NLS-1$
 				case MemberActionInfo.PUSH_DOWN_ACTION:		return RefactoringMessages.getString("PushDownInputPage.push_down"); //$NON-NLS-1$
 				default:
 					Assert.isTrue(false);
 					return null;
 			}
 		}

 		/*
 		 * @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object, int)
 		 */
 		public Image getColumnImage(Object element, int columnIndex) {
 			MemberActionInfo mac= (MemberActionInfo)element;
 			switch (columnIndex) {
 				case MEMBER_COLUMN:	return fJavaElementLabelProvider.getImage(mac.getMember());
 				case ACTION_COLUMN:	return null;
 				default :
 					Assert.isTrue(false);
 					return null;
 			}
 		}
 		/*
 		 * @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
 		 */
 		public void dispose() {
 			super.dispose();
 			fJavaElementLabelProvider.dispose();
 		}
 	}

 	private static final int MEMBER_COLUMN= 0;
 	private static final int ACTION_COLUMN= 1;
 	public static final String PAGE_NAME= "PushDownInputPage"; //$NON-NLS-1$
 	private final static String ACTION_PROPERTY= "action"; //$NON-NLS-1$
 	private final static String MEMBER_PROPERTY= "member"; //$NON-NLS-1$

 	private static final int ROW_COUNT= 10;

 	private Button fEditButton;
 	private PullPushCheckboxTableViewer fTableViewer;
 	private Label fStatusLine;

 	public PushDownInputPage() {
 		super(PAGE_NAME, true);
 	}

 	/*
 	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
 	 */
 	public void createControl(Composite parent) {
 		Composite composite= new Composite(parent, SWT.NONE);
 		GridLayout gl= new GridLayout();
 		composite.setLayout(gl);

 		createMemberTableLabel(composite);
 		createMemberTableComposite(composite);
 		createStatusLine(composite);

 		setControl(composite);
 		Dialog.applyDialogFont(composite);
 		WorkbenchHelp.setHelp(getControl(), IJavaHelpContextIds.PUSH_DOWN_WIZARD_PAGE);
 	}

 	private void createStatusLine(Composite composite) {
 		fStatusLine= new Label(composite, SWT.NONE);
 		GridData gd= new GridData();
 		gd.horizontalSpan= 2;
 		updateStatusLine();
 		fStatusLine.setLayoutData(gd);
 	}

 	private void createMemberTableLabel(Composite parent) {
 		Label label= new Label(parent, SWT.NONE) ;
 		label.setText(RefactoringMessages.getString("PushDownInputPage.Specify_actions")); //$NON-NLS-1$
 		GridData gd0= new GridData();
 		label.setLayoutData(gd0);
 	}

 	private void createMemberTableComposite(Composite parent) {
 		Composite composite= new Composite(parent, SWT.NONE);
 		GridData gd= new GridData(GridData.FILL_HORIZONTAL);
 		composite.setLayoutData(gd);
 		GridLayout gl= new GridLayout();
 		gl.numColumns= 2;
 		gl.marginWidth= 0;
 		gl.marginHeight= 0;
 		composite.setLayout(gl);

 		createMemberTable(composite);
 		createButtonComposite(composite);
 	}

 	private void createMemberTable(Composite parent) {
 		TableLayoutComposite layouter= new TableLayoutComposite(parent, SWT.NONE);
 		layouter.addColumnData(new ColumnWeightData(60, true));
 		layouter.addColumnData(new ColumnWeightData(40, true));

 		final Table table= new Table(layouter, SWT.V_SCROLL | SWT.MULTI | SWT.BORDER | SWT.FULL_SELECTION | SWT.CHECK);
 		table.setHeaderVisible(true);
 		table.setLinesVisible(true);

 		GridData gd= new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING);
 		gd.heightHint= table.getHeaderHeight() + (table.getGridLineWidth() + table.getItemHeight()) * ROW_COUNT;
 		layouter.setLayoutData(gd);


 		TableLayout tableLayout= new TableLayout();
 		table.setLayout(tableLayout);

 		TableColumn column0= new TableColumn(table, SWT.NONE);
 		column0.setText(RefactoringMessages.getString("PushDownInputPage.Member")); //$NON-NLS-1$

 		TableColumn column1= new TableColumn(table, SWT.NONE);
 		column1.setText(RefactoringMessages.getString("PushDownInputPage.Action")); //$NON-NLS-1$

 		fTableViewer= new PullPushCheckboxTableViewer(table);
 		fTableViewer.setUseHashlookup(true);
 		fTableViewer.setContentProvider(new ArrayContentProvider());
 		fTableViewer.setLabelProvider(new MemberActionInfoLabelProvider());
 		fTableViewer.addSelectionChangedListener(new ISelectionChangedListener(){
 			public void selectionChanged(SelectionChangedEvent event) {
 				PushDownInputPage.this.updateButtonEnablementState((IStructuredSelection)event.getSelection());
 			}
 		});
 		fTableViewer.addCheckStateListener(new ICheckStateListener(){
 			public void checkStateChanged(CheckStateChangedEvent event) {
 				boolean checked= event.getChecked();
 				MemberActionInfo info= (MemberActionInfo)event.getElement();
 				if (checked)
 					info.setAction(MemberActionInfo.PUSH_DOWN_ACTION);
 				else
 					info.setAction(MemberActionInfo.NO_ACTION);
 				updateUIElements(null);
 			}
 		});
 		fTableViewer.addDoubleClickListener(new IDoubleClickListener(){
 			public void doubleClick(DoubleClickEvent event) {
 				PushDownInputPage.this.editSelectedMembers();
 			}
 		});


 		fTableViewer.setInput(getPushDownRefactoring().getMemberActionInfos());
 		updateUIElements(null);
 		setupCellEditors(table);
 	}

 	private MemberActionInfo[] getActiveInfos() {
 		MemberActionInfo[] infos= getPushDownRefactoring().getMemberActionInfos();
 		List result= new ArrayList(infos.length);
 		for (int i= 0; i < infos.length; i++) {
 			PushDownRefactoring.MemberActionInfo info= infos[i];
 			if (info.isActive())
 				result.add(info);
 		}
 		return (MemberActionInfo[]) result.toArray(new MemberActionInfo[result.size()]);
 	}

 	private void setupCellEditors(final Table table) {
 		final ComboBoxCellEditor comboBoxCellEditor= new ComboBoxCellEditor();
 		comboBoxCellEditor.setStyle(SWT.READ_ONLY);
 		fTableViewer.setCellEditors(new CellEditor [] {null, comboBoxCellEditor});
 		fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				if (comboBoxCellEditor.getControl() == null & ! table.isDisposed())
 					comboBoxCellEditor.create(table);
 				Assert.isTrue(event.getSelection() instanceof IStructuredSelection);
 				IStructuredSelection ss= (IStructuredSelection)event.getSelection();
 				if (ss.size() != 1)
 					return;
 				MemberActionInfo mac= (MemberActionInfo)ss.getFirstElement();
 				comboBoxCellEditor.setItems(MemberActionInfoLabelProvider.getAvailableActionLabels(mac));
 				comboBoxCellEditor.setValue(new Integer(mac.getAction()));
 			}
 		});

 		ICellModifier cellModifier = new PullUpCellModifier();
 		fTableViewer.setCellModifier(cellModifier);
 		fTableViewer.setColumnProperties(new String[] {MEMBER_PROPERTY, ACTION_PROPERTY});
 	}

 	private void createButtonComposite(Composite parent) {
 		Composite composite= new Composite(parent, SWT.NONE);
 		composite.setLayoutData(new GridData(GridData.FILL_VERTICAL));
 		GridLayout gl= new GridLayout();
 		gl.marginHeight= 0;
 		gl.marginWidth= 0;
 		composite.setLayout(gl);

 		fEditButton= new Button(composite, SWT.PUSH);
 		fEditButton.setText(RefactoringMessages.getString("PushDownInputPage.Edit")); //$NON-NLS-1$
 		fEditButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		fEditButton.setEnabled(false);
 		SWTUtil.setButtonDimensionHint(fEditButton);
 		fEditButton.addSelectionListener(new SelectionAdapter(){
 			public void widgetSelected(SelectionEvent event) {
 				PushDownInputPage.this.editSelectedMembers();
 			}
 		});

 		Button addButton= new Button(composite, SWT.PUSH);
 		addButton.setText(RefactoringMessages.getString("PushDownInputPage.Add_Required")); //$NON-NLS-1$
 		addButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		SWTUtil.setButtonDimensionHint(addButton);
 		addButton.addSelectionListener(new SelectionAdapter(){
 			public void widgetSelected(SelectionEvent event) {
 				PushDownInputPage.this.markAdditionalRequiredMembersAsMembersToPushDown();
 			}
 		});
 	}

 	public void markAdditionalRequiredMembersAsMembersToPushDown() {
 		try {
 			PlatformUI.getWorkbench().getActiveWorkbenchWindow().run(false, false, new IRunnableWithProgress() {
 				public void run(IProgressMonitor pm) throws InvocationTargetException {
 					try {
 						getPushDownRefactoring().computeAdditionalRequiredMembersToPushDown(pm);
 						updateUIElements(null);
 					} catch (JavaModelException e) {
 						throw new InvocationTargetException(e);
 					} finally {
 						pm.done();
 					}
 				}
 			});
 		} catch(InvocationTargetException e) {
 			ExceptionHandler.handle(e, getShell(), RefactoringMessages.getString("PushDownInputPage.Push_Down"), RefactoringMessages.getString("PushDownInputPage.Internal_Error")); //$NON-NLS-1$ //$NON-NLS-2$
 		} catch(InterruptedException e) {
 			Assert.isTrue(false);//not cancellable
 		}
 	}

 	private void editSelectedMembers() {
 		if (! fEditButton.isEnabled())
 			return;
 		ISelection preserved= fTableViewer.getSelection();
 		try{
 			String shellTitle= RefactoringMessages.getString("PushDownInputPage.Edit_members"); //$NON-NLS-1$
 			String labelText= RefactoringMessages.getString("PushDownInputPage.Mark_selected_members"); //$NON-NLS-1$
 			Map stringMapping= createStringMappingForSelectedElements();
 			String[] keys= (String[]) stringMapping.keySet().toArray(new String[stringMapping.keySet().size()]);
 			Arrays.sort(keys);
 			int initialSelectionIndex= getInitialSelectionIndexForEditDialog(stringMapping, keys);

 			ComboSelectionDialog dialog= new ComboSelectionDialog(getShell(), shellTitle, labelText, keys, initialSelectionIndex);
 			dialog.setBlockOnOpen(true);
 			if (dialog.open() == Dialog.CANCEL)
 				return;
 			int action= ((Integer)stringMapping.get(dialog.getSelectedString())).intValue();
 			setInfoAction(getSelectedMemberActionInfos(), action);
 		} finally{
 			updateUIElements(preserved);
 		}
 	}

 	private int getInitialSelectionIndexForEditDialog(Map stringMapping, String[] keys) {
 		int commonActionCode= getCommonActionCodeForSelectedInfos();
 		if (commonActionCode == -1)
 			return 0;
 		for (Iterator iter= stringMapping.keySet().iterator(); iter.hasNext();) {
 			String key= (String) iter.next();
 			int action= ((Integer)stringMapping.get(key)).intValue();
 			if (commonActionCode == action){
 				for (int i= 0; i < keys.length; i++) {
 					if (key.equals(keys[i]))
 						return i;
 				}
 				Assert.isTrue(false);//there's no way
 			}
 		}
 		return 0;
 	}

 	private int getCommonActionCodeForSelectedInfos() {
 		MemberActionInfo[] infos= getSelectedMemberActionInfos();
 		if (infos.length == 0)
 			return -1;

 		int code= infos[0].getAction();
 		for (int i= 0; i < infos.length; i++) {
 			if (code != infos[i].getAction())
 				return -1;
 		}
 		return code;
 	}

 	//String -> Integer
 	private Map createStringMappingForSelectedElements() {
 		Map result= new HashMap();
 		addToStringMapping(result, MemberActionInfo.PUSH_DOWN_ACTION);
 		addToStringMapping(result, MemberActionInfo.PUSH_ABSTRACT_ACTION);
 		return result;
 	}
 	private void addToStringMapping(Map result, int action) {
 		result.put(MemberActionInfoLabelProvider.getActionLabel(action), new Integer(action));
 	}

 	private static void setInfoAction(MemberActionInfo[] infos, int action) {
 		for (int i = 0; i < infos.length; i++) {
 			infos[i].setAction(action);
 		}
 	}

 	private MemberActionInfo[] getSelectedMemberActionInfos() {
 		Assert.isTrue(fTableViewer.getSelection() instanceof IStructuredSelection);
 		List result= getTableSelection().toList();
 		return (MemberActionInfo[]) result.toArray(new MemberActionInfo[result.size()]);
 	}

 	private IStructuredSelection getTableSelection() {
 		return (IStructuredSelection)fTableViewer.getSelection();
 	}

 	private void updateUIElements(ISelection preserved) {
 		fTableViewer.refresh();
 		if (preserved != null){
 			fTableViewer.getControl().setFocus();
 			fTableViewer.setSelection(preserved);
 		}
 		checkPageCompletionStatus();
 		updateButtonEnablementState(getTableSelection());
 		updateStatusLine();
 	}

 	private void updateStatusLine(){
 		if (fStatusLine == null)
 			return;
 		int selected= fTableViewer.getCheckedElements().length;
 		String[] keys= {String.valueOf(selected)};
 		String msg= RefactoringMessages.getFormattedString("PushDownInputPage.status_line", keys); //$NON-NLS-1$
 		fStatusLine.setText(msg);
 	}

 	private void checkPageCompletionStatus() {
 		if (areAllElementsMarkedAsNoAction()){
 			setErrorMessage(RefactoringMessages.getString("PushDownInputPage.Select_members_to_push_down")); //$NON-NLS-1$
 			setPageComplete(false);
 		} else {
 			setErrorMessage(null);
 			setPageComplete(true);
 		}
 	}

 	private boolean areAllElementsMarkedAsNoAction() {
 		return countInfosForAction(MemberActionInfo.NO_ACTION) == getTableInputAsMemberActionInfoArray().length;
 	}

 	private int countInfosForAction(int action) {
 		MemberActionInfo[] macs= getTableInputAsMemberActionInfoArray();
 		int count= 0;
 		for (int i= 0; i < macs.length; i++) {
 			MemberActionInfo info= macs[i];
 			if (info.getAction() == action)
 				count++;
 		}
 		return count;
 	}

 	private MemberActionInfo[] getTableInputAsMemberActionInfoArray() {
 		return (MemberActionInfo[])fTableViewer.getInput();
 	}

 	private void updateButtonEnablementState(IStructuredSelection tableSelection) {
 		if (tableSelection == null || fEditButton == null)
 			return;

 		fEditButton.setEnabled(enableEditButton(tableSelection));
 	}
 	private boolean enableEditButton(IStructuredSelection tableSelection) {
 		if (tableSelection.isEmpty() || tableSelection.size() == 0)
 			return false;
 		return tableSelection.size() == countEditableInfos(getSelectedMemberActionInfos());
 	}

 	private static int countEditableInfos(MemberActionInfo[] memberActionInfos) {
 		int result= 0;
 		for (int i= 0; i < memberActionInfos.length; i++) {
 			if (memberActionInfos[i].isEditable())
 				result++;
 		}
 		return result;
 	}

 	private PushDownRefactoring getPushDownRefactoring(){
 		return (PushDownRefactoring)getRefactoring();
 	}

 	/* (non-Javadoc)
 	 * @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
 	 */
 	public void setVisible(boolean visible) {
 		super.setVisible(visible);
 		if (visible){
 			fTableViewer.setSelection(new StructuredSelection(getActiveInfos()), true);
 			fTableViewer.getControl().setFocus();
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Common Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/cpl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.refactoring;

	import java.lang.reflect.InvocationTargetException;
	import java.util.ArrayList;
	import java.util.Arrays;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;

	import org.eclipse.core.runtime.IProgressMonitor;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	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.Item;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;

	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.operation.IRunnableWithProgress;
	import org.eclipse.jface.viewers.ArrayContentProvider;
	import org.eclipse.jface.viewers.CellEditor;
	import org.eclipse.jface.viewers.CheckStateChangedEvent;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.ComboBoxCellEditor;
	import org.eclipse.jface.viewers.DoubleClickEvent;
	import org.eclipse.jface.viewers.ICellModifier;
	import org.eclipse.jface.viewers.ICheckStateListener;
	import org.eclipse.jface.viewers.IDoubleClickListener;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TableLayout;

	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.help.WorkbenchHelp;

	import org.eclipse.jdt.core.JavaModelException;

	import org.eclipse.jdt.ui.JavaElementLabelProvider;

	import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
	import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
	import org.eclipse.jdt.internal.ui.util.SWTUtil;
	import org.eclipse.jdt.internal.ui.util.TableLayoutComposite;

	import org.eclipse.jdt.internal.corext.Assert;
	import org.eclipse.jdt.internal.corext.refactoring.structure.PushDownRefactoring;
	import org.eclipse.jdt.internal.corext.refactoring.structure.PushDownRefactoring.MemberActionInfo;

	class PushDownInputPage extends UserInputWizardPage {

	private class PullUpCellModifier implements ICellModifier {
	/*
	* @see org.eclipse.jface.viewers.ICellModifier#getValue(java.lang.Object, java.lang.String)
	*/
	public Object getValue(Object element, String property) {
	if (! ACTION_PROPERTY.equals(property))
	return null;

	MemberActionInfo mac= (MemberActionInfo)element;
	return new Integer(mac.getAction());
	}
	/*
	* @see org.eclipse.jface.viewers.ICellModifier#canModify(java.lang.Object, java.lang.String)
	*/
	public boolean canModify(Object element, String property) {
	if (! ACTION_PROPERTY.equals(property))
	return false;
	return ((MemberActionInfo)element).isEditable();
	}
	/*
	* @see org.eclipse.jface.viewers.ICellModifier#modify(java.lang.Object, java.lang.String, java.lang.Object)
	*/
	public void modify(Object element, String property, Object value) {
	if (! ACTION_PROPERTY.equals(property))
	return;

	int action= ((Integer)value).intValue();
	MemberActionInfo mac;
	if (element instanceof Item) {
	mac= (MemberActionInfo)((Item)element).getData();
	} else
	mac= (MemberActionInfo)element;
	mac.setAction(action);
	PushDownInputPage.this.updateUIElements(null);
	}
	}

	private static class MemberActionInfoLabelProvider extends LabelProvider implements ITableLabelProvider {
	private final ILabelProvider fJavaElementLabelProvider= new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_DEFAULT \| JavaElementLabelProvider.SHOW_SMALL_ICONS);

	/*
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnText(java.lang.Object, int)
	*/
	public String getColumnText(Object element, int columnIndex) {
	MemberActionInfo mac= (MemberActionInfo)element;
	switch (columnIndex) {
	case MEMBER_COLUMN : return fJavaElementLabelProvider.getText(mac.getMember());
	case ACTION_COLUMN : return getActionLabel(mac);
	default :
	Assert.isTrue(false);
	return null;
	}
	}

	static String[] getAvailableActionLabels(MemberActionInfo mac){
	int[] actions= mac.getAvailableActions();
	String[] result= new String[actions.length];
	for(int i= 0; i < actions.length; i++){
	result[i]= getActionLabel(actions[i]);
	}
	return result;
	}

	static String getActionLabel(MemberActionInfo mac) {
	return getActionLabel(mac.getAction());
	}

	static String getActionLabel(int action) {
	switch(action){
	case MemberActionInfo.NO_ACTION: return ""; //$NON-NLS-1$
	case MemberActionInfo.PUSH_ABSTRACT_ACTION: return RefactoringMessages.getString("PushDownInputPage.leave_abstract"); //$NON-NLS-1$
	case MemberActionInfo.PUSH_DOWN_ACTION: return RefactoringMessages.getString("PushDownInputPage.push_down"); //$NON-NLS-1$
	default:
	Assert.isTrue(false);
	return null;
	}
	}

	/*
	* @see org.eclipse.jface.viewers.ITableLabelProvider#getColumnImage(java.lang.Object, int)
	*/
	public Image getColumnImage(Object element, int columnIndex) {
	MemberActionInfo mac= (MemberActionInfo)element;
	switch (columnIndex) {
	case MEMBER_COLUMN: return fJavaElementLabelProvider.getImage(mac.getMember());
	case ACTION_COLUMN: return null;
	default :
	Assert.isTrue(false);
	return null;
	}
	}
	/*
	* @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
	*/
	public void dispose() {
	super.dispose();
	fJavaElementLabelProvider.dispose();
	}
	}

	private static final int MEMBER_COLUMN= 0;
	private static final int ACTION_COLUMN= 1;
	public static final String PAGE_NAME= "PushDownInputPage"; //$NON-NLS-1$
	private final static String ACTION_PROPERTY= "action"; //$NON-NLS-1$
	private final static String MEMBER_PROPERTY= "member"; //$NON-NLS-1$

	private static final int ROW_COUNT= 10;

	private Button fEditButton;
	private PullPushCheckboxTableViewer fTableViewer;
	private Label fStatusLine;

	public PushDownInputPage() {
	super(PAGE_NAME, true);
	}

	/*
	* @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
	*/
	public void createControl(Composite parent) {
	Composite composite= new Composite(parent, SWT.NONE);
	GridLayout gl= new GridLayout();
	composite.setLayout(gl);

	createMemberTableLabel(composite);
	createMemberTableComposite(composite);
	createStatusLine(composite);

	setControl(composite);
	Dialog.applyDialogFont(composite);
	WorkbenchHelp.setHelp(getControl(), IJavaHelpContextIds.PUSH_DOWN_WIZARD_PAGE);
	}

	private void createStatusLine(Composite composite) {
	fStatusLine= new Label(composite, SWT.NONE);
	GridData gd= new GridData();
	gd.horizontalSpan= 2;
	updateStatusLine();
	fStatusLine.setLayoutData(gd);
	}

	private void createMemberTableLabel(Composite parent) {
	Label label= new Label(parent, SWT.NONE) ;
	label.setText(RefactoringMessages.getString("PushDownInputPage.Specify_actions")); //$NON-NLS-1$
	GridData gd0= new GridData();
	label.setLayoutData(gd0);
	}

	private void createMemberTableComposite(Composite parent) {
	Composite composite= new Composite(parent, SWT.NONE);
	GridData gd= new GridData(GridData.FILL_HORIZONTAL);
	composite.setLayoutData(gd);
	GridLayout gl= new GridLayout();
	gl.numColumns= 2;
	gl.marginWidth= 0;
	gl.marginHeight= 0;
	composite.setLayout(gl);

	createMemberTable(composite);
	createButtonComposite(composite);
	}

	private void createMemberTable(Composite parent) {
	TableLayoutComposite layouter= new TableLayoutComposite(parent, SWT.NONE);
	layouter.addColumnData(new ColumnWeightData(60, true));
	layouter.addColumnData(new ColumnWeightData(40, true));

	final Table table= new Table(layouter, SWT.V_SCROLL \| SWT.MULTI \| SWT.BORDER \| SWT.FULL_SELECTION \| SWT.CHECK);
	table.setHeaderVisible(true);
	table.setLinesVisible(true);

	GridData gd= new GridData(GridData.FILL_HORIZONTAL \| GridData.VERTICAL_ALIGN_BEGINNING);
	gd.heightHint= table.getHeaderHeight() + (table.getGridLineWidth() + table.getItemHeight()) * ROW_COUNT;
	layouter.setLayoutData(gd);


	TableLayout tableLayout= new TableLayout();
	table.setLayout(tableLayout);

	TableColumn column0= new TableColumn(table, SWT.NONE);
	column0.setText(RefactoringMessages.getString("PushDownInputPage.Member")); //$NON-NLS-1$

	TableColumn column1= new TableColumn(table, SWT.NONE);
	column1.setText(RefactoringMessages.getString("PushDownInputPage.Action")); //$NON-NLS-1$

	fTableViewer= new PullPushCheckboxTableViewer(table);
	fTableViewer.setUseHashlookup(true);
	fTableViewer.setContentProvider(new ArrayContentProvider());
	fTableViewer.setLabelProvider(new MemberActionInfoLabelProvider());
	fTableViewer.addSelectionChangedListener(new ISelectionChangedListener(){
	public void selectionChanged(SelectionChangedEvent event) {
	PushDownInputPage.this.updateButtonEnablementState((IStructuredSelection)event.getSelection());
	}
	});
	fTableViewer.addCheckStateListener(new ICheckStateListener(){
	public void checkStateChanged(CheckStateChangedEvent event) {
	boolean checked= event.getChecked();
	MemberActionInfo info= (MemberActionInfo)event.getElement();
	if (checked)
	info.setAction(MemberActionInfo.PUSH_DOWN_ACTION);
	else
	info.setAction(MemberActionInfo.NO_ACTION);
	updateUIElements(null);
	}
	});
	fTableViewer.addDoubleClickListener(new IDoubleClickListener(){
	public void doubleClick(DoubleClickEvent event) {
	PushDownInputPage.this.editSelectedMembers();
	}
	});


	fTableViewer.setInput(getPushDownRefactoring().getMemberActionInfos());
	updateUIElements(null);
	setupCellEditors(table);
	}

	private MemberActionInfo[] getActiveInfos() {
	MemberActionInfo[] infos= getPushDownRefactoring().getMemberActionInfos();
	List result= new ArrayList(infos.length);
	for (int i= 0; i < infos.length; i++) {
	PushDownRefactoring.MemberActionInfo info= infos[i];
	if (info.isActive())
	result.add(info);
	}
	return (MemberActionInfo[]) result.toArray(new MemberActionInfo[result.size()]);
	}

	private void setupCellEditors(final Table table) {
	final ComboBoxCellEditor comboBoxCellEditor= new ComboBoxCellEditor();
	comboBoxCellEditor.setStyle(SWT.READ_ONLY);
	fTableViewer.setCellEditors(new CellEditor [] {null, comboBoxCellEditor});
	fTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	if (comboBoxCellEditor.getControl() == null & ! table.isDisposed())
	comboBoxCellEditor.create(table);
	Assert.isTrue(event.getSelection() instanceof IStructuredSelection);
	IStructuredSelection ss= (IStructuredSelection)event.getSelection();
	if (ss.size() != 1)
	return;
	MemberActionInfo mac= (MemberActionInfo)ss.getFirstElement();
	comboBoxCellEditor.setItems(MemberActionInfoLabelProvider.getAvailableActionLabels(mac));
	comboBoxCellEditor.setValue(new Integer(mac.getAction()));
	}
	});

	ICellModifier cellModifier = new PullUpCellModifier();
	fTableViewer.setCellModifier(cellModifier);
	fTableViewer.setColumnProperties(new String[] {MEMBER_PROPERTY, ACTION_PROPERTY});
	}

	private void createButtonComposite(Composite parent) {
	Composite composite= new Composite(parent, SWT.NONE);
	composite.setLayoutData(new GridData(GridData.FILL_VERTICAL));
	GridLayout gl= new GridLayout();
	gl.marginHeight= 0;
	gl.marginWidth= 0;
	composite.setLayout(gl);

	fEditButton= new Button(composite, SWT.PUSH);
	fEditButton.setText(RefactoringMessages.getString("PushDownInputPage.Edit")); //$NON-NLS-1$
	fEditButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	fEditButton.setEnabled(false);
	SWTUtil.setButtonDimensionHint(fEditButton);
	fEditButton.addSelectionListener(new SelectionAdapter(){
	public void widgetSelected(SelectionEvent event) {
	PushDownInputPage.this.editSelectedMembers();
	}
	});

	Button addButton= new Button(composite, SWT.PUSH);
	addButton.setText(RefactoringMessages.getString("PushDownInputPage.Add_Required")); //$NON-NLS-1$
	addButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	SWTUtil.setButtonDimensionHint(addButton);
	addButton.addSelectionListener(new SelectionAdapter(){
	public void widgetSelected(SelectionEvent event) {
	PushDownInputPage.this.markAdditionalRequiredMembersAsMembersToPushDown();
	}
	});
	}

	public void markAdditionalRequiredMembersAsMembersToPushDown() {
	try {
	PlatformUI.getWorkbench().getActiveWorkbenchWindow().run(false, false, new IRunnableWithProgress() {
	public void run(IProgressMonitor pm) throws InvocationTargetException {
	try {
	getPushDownRefactoring().computeAdditionalRequiredMembersToPushDown(pm);
	updateUIElements(null);
	} catch (JavaModelException e) {
	throw new InvocationTargetException(e);
	} finally {
	pm.done();
	}
	}
	});
	} catch(InvocationTargetException e) {
	ExceptionHandler.handle(e, getShell(), RefactoringMessages.getString("PushDownInputPage.Push_Down"), RefactoringMessages.getString("PushDownInputPage.Internal_Error")); //$NON-NLS-1$ //$NON-NLS-2$
	} catch(InterruptedException e) {
	Assert.isTrue(false);//not cancellable
	}
	}

	private void editSelectedMembers() {
	if (! fEditButton.isEnabled())
	return;
	ISelection preserved= fTableViewer.getSelection();
	try{
	String shellTitle= RefactoringMessages.getString("PushDownInputPage.Edit_members"); //$NON-NLS-1$
	String labelText= RefactoringMessages.getString("PushDownInputPage.Mark_selected_members"); //$NON-NLS-1$
	Map stringMapping= createStringMappingForSelectedElements();
	String[] keys= (String[]) stringMapping.keySet().toArray(new String[stringMapping.keySet().size()]);
	Arrays.sort(keys);
	int initialSelectionIndex= getInitialSelectionIndexForEditDialog(stringMapping, keys);

	ComboSelectionDialog dialog= new ComboSelectionDialog(getShell(), shellTitle, labelText, keys, initialSelectionIndex);
	dialog.setBlockOnOpen(true);
	if (dialog.open() == Dialog.CANCEL)
	return;
	int action= ((Integer)stringMapping.get(dialog.getSelectedString())).intValue();
	setInfoAction(getSelectedMemberActionInfos(), action);
	} finally{
	updateUIElements(preserved);
	}
	}

	private int getInitialSelectionIndexForEditDialog(Map stringMapping, String[] keys) {
	int commonActionCode= getCommonActionCodeForSelectedInfos();
	if (commonActionCode == -1)
	return 0;
	for (Iterator iter= stringMapping.keySet().iterator(); iter.hasNext();) {
	String key= (String) iter.next();
	int action= ((Integer)stringMapping.get(key)).intValue();
	if (commonActionCode == action){
	for (int i= 0; i < keys.length; i++) {
	if (key.equals(keys[i]))
	return i;
	}
	Assert.isTrue(false);//there's no way
	}
	}
	return 0;
	}

	private int getCommonActionCodeForSelectedInfos() {
	MemberActionInfo[] infos= getSelectedMemberActionInfos();
	if (infos.length == 0)
	return -1;

	int code= infos[0].getAction();
	for (int i= 0; i < infos.length; i++) {
	if (code != infos[i].getAction())
	return -1;
	}
	return code;
	}

	//String -> Integer
	private Map createStringMappingForSelectedElements() {
	Map result= new HashMap();
	addToStringMapping(result, MemberActionInfo.PUSH_DOWN_ACTION);
	addToStringMapping(result, MemberActionInfo.PUSH_ABSTRACT_ACTION);
	return result;
	}
	private void addToStringMapping(Map result, int action) {
	result.put(MemberActionInfoLabelProvider.getActionLabel(action), new Integer(action));
	}

	private static void setInfoAction(MemberActionInfo[] infos, int action) {
	for (int i = 0; i < infos.length; i++) {
	infos[i].setAction(action);
	}
	}

	private MemberActionInfo[] getSelectedMemberActionInfos() {
	Assert.isTrue(fTableViewer.getSelection() instanceof IStructuredSelection);
	List result= getTableSelection().toList();
	return (MemberActionInfo[]) result.toArray(new MemberActionInfo[result.size()]);
	}

	private IStructuredSelection getTableSelection() {
	return (IStructuredSelection)fTableViewer.getSelection();
	}

	private void updateUIElements(ISelection preserved) {
	fTableViewer.refresh();
	if (preserved != null){
	fTableViewer.getControl().setFocus();
	fTableViewer.setSelection(preserved);
	}
	checkPageCompletionStatus();
	updateButtonEnablementState(getTableSelection());
	updateStatusLine();
	}

	private void updateStatusLine(){
	if (fStatusLine == null)
	return;
	int selected= fTableViewer.getCheckedElements().length;
	String[] keys= {String.valueOf(selected)};
	String msg= RefactoringMessages.getFormattedString("PushDownInputPage.status_line", keys); //$NON-NLS-1$
	fStatusLine.setText(msg);
	}

	private void checkPageCompletionStatus() {
	if (areAllElementsMarkedAsNoAction()){
	setErrorMessage(RefactoringMessages.getString("PushDownInputPage.Select_members_to_push_down")); //$NON-NLS-1$
	setPageComplete(false);
	} else {
	setErrorMessage(null);
	setPageComplete(true);
	}
	}

	private boolean areAllElementsMarkedAsNoAction() {
	return countInfosForAction(MemberActionInfo.NO_ACTION) == getTableInputAsMemberActionInfoArray().length;
	}

	private int countInfosForAction(int action) {
	MemberActionInfo[] macs= getTableInputAsMemberActionInfoArray();
	int count= 0;
	for (int i= 0; i < macs.length; i++) {
	MemberActionInfo info= macs[i];
	if (info.getAction() == action)
	count++;
	}
	return count;
	}

	private MemberActionInfo[] getTableInputAsMemberActionInfoArray() {
	return (MemberActionInfo[])fTableViewer.getInput();
	}

	private void updateButtonEnablementState(IStructuredSelection tableSelection) {
	if (tableSelection == null \|\| fEditButton == null)
	return;

	fEditButton.setEnabled(enableEditButton(tableSelection));
	}
	private boolean enableEditButton(IStructuredSelection tableSelection) {
	if (tableSelection.isEmpty() \|\| tableSelection.size() == 0)
	return false;
	return tableSelection.size() == countEditableInfos(getSelectedMemberActionInfos());
	}

	private static int countEditableInfos(MemberActionInfo[] memberActionInfos) {
	int result= 0;
	for (int i= 0; i < memberActionInfos.length; i++) {
	if (memberActionInfos[i].isEditable())
	result++;
	}
	return result;
	}

	private PushDownRefactoring getPushDownRefactoring(){
	return (PushDownRefactoring)getRefactoring();
	}

	/* (non-Javadoc)
	* @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
	*/
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible){
	fTableViewer.setSelection(new StructuredSelection(getActiveInfos()), true);
	fTableViewer.getControl().setFocus();
	}
	}
	}