content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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:
   *   Jesper Kamstrup Linnet (eclipse@kamstrup-linnet.dk) - initial API and implementation 
   *          (report 36180: Callers/Callees view)
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.callhierarchy;
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.eclipse.core.runtime.IStatus;
  import org.eclipse.jface.action.Action;
  import org.eclipse.jface.dialogs.StatusDialog;
  import org.eclipse.jface.viewers.ISelection;
  import org.eclipse.jface.viewers.StructuredSelection;
  import org.eclipse.jface.window.Window;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IFunction;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.internal.ui.dialogs.StatusInfo;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.DialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.IListAdapter;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.LayoutUtil;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.ListDialogField;
  import org.eclipse.wst.jsdt.ui.JavaScriptElementLabelProvider;
  
  public class HistoryListAction extends Action {
  	
  	private class HistoryListDialog extends StatusDialog {
  		
  		private ListDialogField fHistoryList;
  		private IStatus fHistoryStatus;
  		private IFunction fResult;
  		
  		private HistoryListDialog(Shell shell, IFunction[] elements) {
  			super(shell);
  			setTitle(CallHierarchyMessages.HistoryListDialog_title); 
  			
  			String[] buttonLabels= new String[] { 
  				CallHierarchyMessages.HistoryListDialog_remove_button, 
  			};
  					
  			IListAdapter adapter= new IListAdapter() {
  				public void customButtonPressed(ListDialogField field, int index) {
  					doCustomButtonPressed();
  				}
  				public void selectionChanged(ListDialogField field) {
  					doSelectionChanged();
  				}
  				
  				public void doubleClicked(ListDialogField field) {
  					doDoubleClicked();
  				}				
  			};
  		
  			JavaScriptElementLabelProvider labelProvider= new JavaScriptElementLabelProvider(JavaScriptElementLabelProvider.SHOW_QUALIFIED | JavaScriptElementLabelProvider.SHOW_ROOT);
  			
  			fHistoryList= new ListDialogField(adapter, buttonLabels, labelProvider);
  			fHistoryList.setLabelText(CallHierarchyMessages.HistoryListDialog_label); 
  			fHistoryList.setElements(Arrays.asList(elements));
  			
  			ISelection sel;
  			if (elements.length > 0) {
  				sel= new StructuredSelection(elements[0]);
  			} else {
  				sel= new StructuredSelection();
  			}
  			
  			fHistoryList.selectElements(sel);
  		}
  
  			
  		/*
  		 * @see Dialog#createDialogArea(Composite)
  		 */
  		protected Control createDialogArea(Composite parent) {
  			initializeDialogUnits(parent);
  			
  			Composite composite= (Composite) super.createDialogArea(parent);
  			
  			Composite inner= new Composite(composite, SWT.NONE);
  			inner.setLayoutData(new GridData(GridData.FILL_BOTH));
  			inner.setFont(composite.getFont());
  
  			LayoutUtil.doDefaultLayout(inner, new DialogField[] { fHistoryList }, true, 0, 0);
  			LayoutUtil.setHeightHint(fHistoryList.getListControl(null), convertHeightInCharsToPixels(12));
  			LayoutUtil.setHorizontalGrabbing(fHistoryList.getListControl(null));
  
  			applyDialogFont(composite);		
  			return composite;
  		}
  
  		/**
  		 * Method doCustomButtonPressed.
  		 */
  		private void doCustomButtonPressed() {
  			fHistoryList.removeElements(fHistoryList.getSelectedElements());
  		}
  		
  		private void doDoubleClicked() {
  			if (fHistoryStatus.isOK()) {
  				okPressed();
  			}
  		}
  		
  		
  		private void doSelectionChanged() {
          	StatusInfo status= new StatusInfo();
          	List selected= fHistoryList.getSelectedElements();
          	if (selected.size() != 1) {
          		status.setError(""); //$NON-NLS-1$
          		fResult= null;
          	} else {
          		fResult= (IFunction) selected.get(0);
          	}
          	fHistoryList.enableButton(0, fHistoryList.getSize() > selected.size() && selected.size() != 0);			
          	fHistoryStatus= status;
          	updateStatus(status);	
          }
  				
  		public IFunction getResult() {
  			return fResult;
  		}
  		
  		public IFunction[] getRemaining() {
  			List elems= fHistoryList.getElements();
  			return (IFunction[]) elems.toArray(new IFunction[elems.size()]);
  		}	
  		
  		/*
  		 * @see org.eclipse.jface.window.Window#configureShell(Shell)
  		 */
  		protected void configureShell(Shell newShell) {
  			super.configureShell(newShell);
  			PlatformUI.getWorkbench().getHelpSystem().setHelp(newShell, IJavaHelpContextIds.HISTORY_LIST_DIALOG);
  		}
  
  		/* (non-Javadoc)
  		 * @see org.eclipse.jface.window.Window#create()
  		 */
  		public void create() {
  			setShellStyle(getShellStyle() | SWT.RESIZE);
  			super.create();
  		}
  
  	}
  	
  	private CallHierarchyViewPart fView;
  	
  	public HistoryListAction(CallHierarchyViewPart view) {
  		fView= view;
  		setText(CallHierarchyMessages.HistoryListAction_label); 
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.HISTORY_LIST_ACTION);
  	}
  		
  	/*
  	 * @see IAction#run()
  	 */
  	public void run() {
  		IFunction[] historyEntries= fView.getHistoryEntries();
  		HistoryListDialog dialog= new HistoryListDialog(JavaScriptPlugin.getActiveWorkbenchShell(), historyEntries);
  		if (dialog.open() == Window.OK) {
  			fView.setHistoryEntries(dialog.getRemaining());
  			fView.setMethod(dialog.getResult());
  		}
  	}
  
  }
  
  