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:
   *     IBM Corporation - initial API and implementation
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.preferences;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.StringTokenizer;
  
  import org.eclipse.jface.dialogs.Dialog;
  import org.eclipse.jface.dialogs.IDialogConstants;
  import org.eclipse.jface.preference.IPreferenceStore;
  import org.eclipse.jface.preference.PreferencePage;
  import org.eclipse.jface.viewers.LabelProvider;
  import org.eclipse.jface.viewers.ViewerComparator;
  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.swt.widgets.Control;
  import org.eclipse.ui.IWorkbench;
  import org.eclipse.ui.IWorkbenchPreferencePage;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IPackageFragment;
  import org.eclipse.wst.jsdt.core.search.IJavaScriptSearchScope;
  import org.eclipse.wst.jsdt.core.search.SearchEngine;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.internal.ui.dialogs.PackageSelectionDialog;
  import org.eclipse.wst.jsdt.internal.ui.util.BusyIndicatorRunnableContext;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.CheckedListDialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.DialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.IDialogFieldListener;
  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.PreferenceConstants;
  
  /*
   * The page for setting the type filters
   */
  public class TypeFilterPreferencePage extends PreferencePage implements IWorkbenchPreferencePage {
  
  	public static final String TYPE_FILTER_PREF_PAGE_ID= "org.eclipse.wst.jsdt.ui.preferences.TypeFilterPreferencePage"; //$NON-NLS-1$
  	
  	private static final String PREF_FILTER_ENABLED= PreferenceConstants.TYPEFILTER_ENABLED;
  	private static final String PREF_FILTER_DISABLED= PreferenceConstants.TYPEFILTER_DISABLED;
  	
  	private static String[] unpackOrderList(String str) {
  		StringTokenizer tok= new StringTokenizer(str, ";"); //$NON-NLS-1$
  		int nTokens= tok.countTokens();
  		String[] res= new String[nTokens];
  		for (int i= 0; i < nTokens; i++) {
  			res[i]= tok.nextToken();
  		}
  		return res;
  	}
  	
  	private static String packOrderList(List orderList) {
  		StringBuffer buf= new StringBuffer();
  		for (int i= 0; i < orderList.size(); i++) {
  			buf.append((String) orderList.get(i));
  			buf.append(';');
  		}
  		return buf.toString();
  	}	
  		
  	private class TypeFilterAdapter implements IListAdapter, IDialogFieldListener {
  
  		private boolean canEdit(ListDialogField field) {
  			return field.getSelectedElements().size() == 1;
  		}
  
          public void customButtonPressed(ListDialogField field, int index) {
          	doButtonPressed(index);
          }
  
          public void selectionChanged(ListDialogField field) {
  			fFilterListField.enableButton(IDX_EDIT, canEdit(field));
          }
  
          public void dialogFieldChanged(DialogField field) {
          }
          
          public void doubleClicked(ListDialogField field) {
          	if (canEdit(field)) {
  				doButtonPressed(IDX_EDIT);
          	}
          }
  	}
  	
  	private static final int IDX_ADD= 0;
  	private static final int IDX_ADD_PACKAGE= 1;
  	private static final int IDX_EDIT= 2;
  	private static final int IDX_REMOVE= 3;
  	private static final int IDX_SELECT= 5;
  	private static final int IDX_DESELECT= 6;
  
  	private CheckedListDialogField fFilterListField;
  	
  	public TypeFilterPreferencePage() {
  		super();
  		setPreferenceStore(JavaScriptPlugin.getDefault().getPreferenceStore());
  		setDescription(PreferencesMessages.TypeFilterPreferencePage_description); 
  	
  		String[] buttonLabels= new String[] { 
  			PreferencesMessages.TypeFilterPreferencePage_add_button, 
  			PreferencesMessages.TypeFilterPreferencePage_addpackage_button, 
  			PreferencesMessages.TypeFilterPreferencePage_edit_button, 
  			PreferencesMessages.TypeFilterPreferencePage_remove_button, 
  			/* 4 */  null,
  			PreferencesMessages.TypeFilterPreferencePage_selectall_button, 
  			PreferencesMessages.TypeFilterPreferencePage_deselectall_button, 
  		};
  				
  		TypeFilterAdapter adapter= new TypeFilterAdapter();
  		
  		fFilterListField= new CheckedListDialogField(adapter, buttonLabels, new LabelProvider());
  		fFilterListField.setDialogFieldListener(adapter);
  		fFilterListField.setLabelText(PreferencesMessages.TypeFilterPreferencePage_list_label); 
  		fFilterListField.setCheckAllButtonIndex(IDX_SELECT);
  		fFilterListField.setUncheckAllButtonIndex(IDX_DESELECT);
  		fFilterListField.setRemoveButtonIndex(IDX_REMOVE);
  		
  		fFilterListField.enableButton(IDX_EDIT, false);
  		
  		initialize(false);
  	}
  	
  	/*
  	 * @see PreferencePage#createControl(org.eclipse.swt.widgets.Composite)
  	 */
  	public void createControl(Composite parent) {
  		super.createControl(parent);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), IJavaHelpContextIds.TYPE_FILTER_PREFERENCE_PAGE);
  	}
  	
  	protected Control createContents(Composite parent) {
  		initializeDialogUnits(parent);
  	
  		Composite composite= new Composite(parent, SWT.NONE);
  		composite.setFont(parent.getFont());
  		
  		GridLayout layout= new GridLayout();
  		layout.numColumns= 2;
  		layout.marginWidth= 0;
  		layout.marginHeight= 0;
  		
  		composite.setLayout(layout);
  		
  		fFilterListField.doFillIntoGrid(composite, 3);
  		LayoutUtil.setHorizontalSpan(fFilterListField.getLabelControl(null), 2);
  		LayoutUtil.setWidthHint(fFilterListField.getLabelControl(null), convertWidthInCharsToPixels(40));
  		LayoutUtil.setHorizontalGrabbing(fFilterListField.getListControl(null));
  		
  		fFilterListField.getTableViewer().setComparator(new ViewerComparator());
  		
  		Dialog.applyDialogFont(composite);
  		return composite;
  	}
  	
  	private void initialize(boolean fromDefault) {
  		IPreferenceStore store= getPreferenceStore();
  		
  		String enabled= fromDefault ? store.getDefaultString(PREF_FILTER_ENABLED) : store.getString(PREF_FILTER_ENABLED);
  		String disabled= fromDefault ? store.getDefaultString(PREF_FILTER_DISABLED) : store.getString(PREF_FILTER_DISABLED);
  		
  		ArrayList res= new ArrayList();
  		
  		String[] enabledEntries= unpackOrderList(enabled);
  		for (int i= 0; i < enabledEntries.length; i++) {
  			res.add(enabledEntries[i]);
  		}
  		String[] disabledEntries= unpackOrderList(disabled);
  		for (int i= 0; i < disabledEntries.length; i++) {
  			res.add(disabledEntries[i]);
  		}
  		
  		fFilterListField.setElements(res);
  		fFilterListField.setCheckedElements(Arrays.asList(enabledEntries));
  	}
  	
  	
  	private void doButtonPressed(int index) {
  		if (index == IDX_ADD) { // add new
  			List existing= fFilterListField.getElements();
  			TypeFilterInputDialog dialog= new TypeFilterInputDialog(getShell(), existing);
  			if (dialog.open() == Window.OK) {
  				Object res= dialog.getResult();
  				fFilterListField.addElement(res);
  				fFilterListField.setChecked(res, true);
  			}
  		} else if (index == IDX_ADD_PACKAGE) { // add packages
  			String[] res= choosePackage();
  			if (res != null) {
  				fFilterListField.addElements(Arrays.asList(res));
  				for (int i= 0; i < res.length; i++) {
  					fFilterListField.setChecked(res[i], true);
  				}
  			}
  			
  		} else if (index == IDX_EDIT) { // edit
  			List selected= fFilterListField.getSelectedElements();
  			if (selected.isEmpty()) {
  				return;
  			}
  			String editedEntry= (String) selected.get(0);
  			
  			List existing= fFilterListField.getElements();
  			existing.remove(editedEntry);
  			
  			TypeFilterInputDialog dialog= new TypeFilterInputDialog(getShell(), existing);
  			dialog.setInitialString(editedEntry);
  			if (dialog.open() == Window.OK) {
  				fFilterListField.replaceElement(editedEntry, dialog.getResult());
  			}
  		}	
  	}
  	
  	private String[] choosePackage() {
  		IJavaScriptSearchScope scope= SearchEngine.createWorkspaceScope();
  		BusyIndicatorRunnableContext context= new BusyIndicatorRunnableContext();
  		int flags= PackageSelectionDialog.F_SHOW_PARENTS | PackageSelectionDialog.F_HIDE_DEFAULT_PACKAGE | PackageSelectionDialog.F_REMOVE_DUPLICATES;
  		PackageSelectionDialog dialog = new PackageSelectionDialog(getShell(), context, flags , scope);
  		dialog.setTitle(PreferencesMessages.TypeFilterPreferencePage_choosepackage_label); 
  		dialog.setMessage(PreferencesMessages.TypeFilterPreferencePage_choosepackage_description); 
  		dialog.setMultipleSelection(true);
  		if (dialog.open() == IDialogConstants.OK_ID) {
  			Object[] fragments= dialog.getResult();
  			String[] res= new String[fragments.length];
  			for (int i= 0; i < res.length; i++) {
  				res[i]= ((IPackageFragment) fragments[i]).getElementName() + ".*"; //$NON-NLS-1$
  			}
  			return res;
  		}
  		return null;
  	}
  	
  	
  	public void init(IWorkbench workbench) {
  	}
  		
      /*
       * @see PreferencePage#performDefaults()
       */
      protected void performDefaults() {
      	initialize(true);
  		
  		super.performDefaults();	
      }
  
  
      /*
       * @see org.eclipse.jface.preference.IPreferencePage#performOk()
       */
      public boolean performOk() {
    		IPreferenceStore prefs= JavaScriptPlugin.getDefault().getPreferenceStore();
    		
    		List checked= fFilterListField.getCheckedElements();
    		List unchecked= fFilterListField.getElements();
    		unchecked.removeAll(checked);
    		
    		prefs.setValue(PREF_FILTER_ENABLED, packOrderList(checked));
    		prefs.setValue(PREF_FILTER_DISABLED, packOrderList(unchecked));
    		JavaScriptPlugin.getDefault().savePluginPreferences();
          return true;
      }
  
  
  }
  
  
  