/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

package com.nokia.s60tools.crashanalyser.model;

import java.util.List;

import org.eclipse.ui.IWorkbench;

import org.eclipse.ui.IWorkbenchPage;

import org.eclipse.ui.IWorkbenchWindow;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.IEditorReference;

import org.eclipse.ui.IEditorPart;

import com.nokia.s60tools.crashanalyser.files.*;

/**

 * Handles opening and closing of Crash Visualizer editors

 *

 */

public final class EditorHandler {

	private EditorHandler() {

		// not meant to be implemented

	}

	/**

	 * Closes all open editors which are Crash Analyser editors

	 */

	public static void closeAllEditors() {

		try {

	    	IWorkbench workbench = PlatformUI.getWorkbench();   

	    	if (workbench == null)

	    		return;

	    	IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();

	    	if (window == null)

	    		return;

	    	String editorId = "com.nokia.s60tools.crashanalyser.ui.editors.MultiPageEditor";

	    	IWorkbenchPage page = window.getActivePage();

	    	if (page == null)

	    		return;

	    	IEditorReference[] editorReferences = page.getEditorReferences();

	    	if (editorReferences == null || editorReferences.length < 1)

	    		return;

	    	// go throug all editors

    		for (int i = 0; i < editorReferences.length; i++) {

    			IEditorReference ref = editorReferences[i];

    			String openEditorId = ref.getId();

    			// if editor is Crash Analyser editor, close it

    	    	if (editorId.compareToIgnoreCase(openEditorId) == 0) {

	    			page.closeEditor(ref.getEditor(true), true);

    	    	}

    		}

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * Checks if given file is already open in editor area. If it is, that editor is

	 * brought as top most editor.

	 * @param file file which is to be checked

	 * @return true if editor was found and brought to top most, false if editor was not found

	 * or an error occurred

	 */

	static boolean bringEditorOnTopIfFileAlreadyOpen(CrashAnalyserFile file) {

		try {

			if (file == null)

				return false;

			// get workbench

	    	IWorkbench workbench = PlatformUI.getWorkbench();

	    	if (workbench == null)

	    		return false;

	    	// get workbench window

	    	IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();

	    	if (window == null)

	    		return false;

	    	String editorId = "com.nokia.s60tools.crashanalyser.ui.editors.MultiPageEditor";

	    	// get workbench page

	    	IWorkbenchPage page = window.getActivePage();

	    	if (page == null)

	    		return false;

	    	// get open editors

	    	IEditorReference[] editorReferences = page.getEditorReferences();

	    	if (editorReferences == null || editorReferences.length < 1)

	    		return false;

	    	// go through all open editors

    		for (int i = 0; i < editorReferences.length; i++) {

    			IEditorReference ref = editorReferences[i];

    			String openEditorId = ref.getId();

    			// if editor is Crash Analyser editor

    	    	if (editorId.compareToIgnoreCase(openEditorId) == 0) {

    	    		IEditorPart part = ref.getEditor(true);

    	    		if (part == null)

    	    			continue;

    	    		String title = part.getTitle();

	    			if (title.equalsIgnoreCase(file.getFileName())) {

	    				page.bringToTop(part);

	    				return true;

	    			}

    	    	}

    		}

		} catch (Exception e) {

			e.printStackTrace();

		}

		return false;

	}

	/**

	 * Closes all given editors

	 */

	public static void closeEditors(List<CrashFileBundle> files) {

		try {

			if (files == null || files.isEmpty())

				return;

			// get workbench

	    	IWorkbench workbench = PlatformUI.getWorkbench();

	    	if (workbench == null)

	    		return;

	    	// get workbench window

	    	IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();

	    	if (window == null)

	    		return;

	    	String editorId = "com.nokia.s60tools.crashanalyser.ui.editors.MultiPageEditor";

	    	// get workbench page

	    	IWorkbenchPage page = window.getActivePage();

	    	if (page == null)

	    		return;

	    	// get open editors

	    	IEditorReference[] editorReferences = page.getEditorReferences();

	    	if (editorReferences == null || editorReferences.length < 1)

	    		return;

	    	// go through all open editors

    		for (int i = 0; i < editorReferences.length; i++) {

    			IEditorReference ref = editorReferences[i];

    			String openEditorId = ref.getId();

    			// if editor is Crash Analyser editor

    	    	if (editorId.compareToIgnoreCase(openEditorId) == 0) {

    	    		IEditorPart part = ref.getEditor(true);

    	    		if (part == null)

    	    			continue;

    	    		String title = part.getTitle();

    	    		boolean close = false;

    	    		// go through all given files and close editor for those

    	    		for (int j = 0; j < files.size(); j++) {

    	    			CrashFileBundle file = files.get(j);

    	    			if (title.equalsIgnoreCase(file.getAnalyzeFileName())) {

    	    				close = true;

    	    				break;

    	    			}

    	    		}

    	    		if (close)

    	    			page.closeEditor(ref.getEditor(true), true);

    	    	}

    		}

		} catch (Exception e) {

			e.printStackTrace();

		}

	}

	/**

	 * Opens up given crash analyser file to a Crash Analyser editor.

	 * @param file file to be opened

	 * @return true if success, false if not

	 */

	private static boolean openEditor(CrashAnalyserFile file) {

		try {

			if (bringEditorOnTopIfFileAlreadyOpen(file))

				return true;

	    	IWorkbench workbench = PlatformUI.getWorkbench();      

	    	if (workbench == null)

	    		return false;

	    	IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();

	    	if (window == null)

	    		return false;

	    	String editorId = "com.nokia.s60tools.crashanalyser.ui.editors.MultiPageEditor";

	    	IWorkbenchPage page = window.getActivePage();

	    	if (page == null)

	    		return false;

    		if (file instanceof CrashFile)

    			page.openEditor((CrashFile)file,editorId );

    		else if (file instanceof SummaryFile)

    			page.openEditor((SummaryFile)file,editorId );

    		else

    			return false;

    		return true;

		} catch (Exception e) {

			e.printStackTrace();

		}

		return false;

	}

	/**

	 * Opens given full crash file to a Crash Analyser editor.

	 * @param file file to be opened

	 * @return true if success, false if not

	 */

	public static boolean openCrashAnalyserEditor(CrashFile file) {

		return openEditor(file);

	}

	/**

	 * Opens given summary crash file to a Crash Analyser editor.

	 * @param file file to be opened

	 * @return true if success, false if not

	 */

	public static boolean openCrashAnalyserEditor(SummaryFile file) {

		return openEditor(file);

	}

}