/*******************************************************************************
 * Copyright (c) 2003, 2006 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.jst.j2ee.internal.plugin;


import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;


/**
 * @author cbridgha
 *
 */
public class CommonEditorUtility {

	public static final Class IRESOURCE_CLASS = IResource.class;

	private CommonEditorUtility() {
		super();
	}

	/**
	 * Returns an array of all editors that have an unsaved content. If the identical content is
	 * presented in more than one editor, only one of those editor parts is part of the result.
	 * 
	 * @return an array of all dirty editor parts.
	 */
	public static IEditorPart[] getDirtyEditors() {
		return getDirtyEditors(null);
	}

	/**
	 * Returns an array of all editors that have an unsaved content, where the content is include in
	 * one of the projects in the List parameter. If the identical content is presented in more than
	 * one editor, only one of those editor parts is part of the result.
	 * 
	 * @return an array of all dirty editor parts.
	 */
	public static IEditorPart[] getDirtyEditors(List projects) {
		Set inputs = new HashSet();
		List result = new ArrayList(0);
		IWorkbench workbench = J2EEUIPlugin.getPluginWorkbench();
		IWorkbenchWindow[] windows = workbench.getWorkbenchWindows();
		for (int i = 0; i < windows.length; i++) {
			IWorkbenchPage[] pages = windows[i].getPages();
			for (int x = 0; x < pages.length; x++) {
				IEditorPart[] editors = pages[x].getDirtyEditors();
				for (int z = 0; z < editors.length; z++) {
					IEditorPart ep = editors[z];
					IEditorInput input = ep.getEditorInput();
					if (!inputs.contains(input) && (projects == null || inputInProjects(input, projects))) {
						inputs.add(input);
						result.add(ep);
					}
				}
			}
		}
		return (IEditorPart[]) result.toArray(new IEditorPart[result.size()]);
	}

	public static boolean inputInProjects(IEditorInput input, List projects) {
		IResource res = (IResource) input.getAdapter(IRESOURCE_CLASS);
		IProject project = res == null ? null : res.getProject();
		if (project == null)
			return false;
		for (int i = 0; i < projects.size(); i++) {
			if (project.equals(projects.get(i)))
				return true;
		}
		return false;
	}

	public static boolean promptToSaveAllDirtyEditors() {
		boolean retVal = true;
		IWorkbench workbench = J2EEUIPlugin.getPluginWorkbench();
		IWorkbenchWindow[] windows = workbench.getWorkbenchWindows();
		for (int i = 0; retVal && i < windows.length; i++) {
			IWorkbenchPage[] pages = windows[i].getPages();
			for (int x = 0; retVal && x < pages.length; x++) {
				retVal = pages[x].saveAllEditors(true);
			}
		}
		return retVal;
	}

	/**
	 * 
	 * This method used to save only the editors specified.  It now saves all dirty editors
	 * due to changes in the Eclipse platform
	 * @param dirtyEditors
	 * @return true if it succeeds, false if the user cancels
	 * @deprecated due to changes in the Eclipse platform
	 */
	public static boolean promptToSaveDirtyEditors(List dirtyEditors) {
		if (dirtyEditors.isEmpty())
			return true;
		return promptToSaveAllDirtyEditors();
	}
	
	/**
	 * This will close all editors without prompting for save.
	 * @param dirtyEditors
	 * @return true is succeeded, false if not
	 */
	public static void closeAllEditors() {
		
		IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
		page.closeAllEditors(false);
		
	}

	public static boolean promptToSaveDirtyEditorsInProjects(List projects) {
		return promptToSaveDirtyEditors(Arrays.asList(getDirtyEditors(projects)));
	}
}