tests/org.eclipse.graphiti.testtool.sketch/src/org/eclipse/graphiti/testtool/sketch/editors/MultiPageEditor.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2011, 2012 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *    mwenz - Bug 387971 - Features cant't be invoked from contextMenu
 *    pjpaulin - Bug 352120 - Changed to instantiate DiagramEditorImpl
 *    pjpaulin - Bug 352120 - Now uses IDiagramContainerUI interface
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.graphiti.testtool.sketch.editors;


import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.graphiti.ui.editor.DiagramEditor;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.ISelectionListener;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.editors.text.TextEditor;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.part.FileEditorInput;

public class MultiPageEditor extends FormEditor implements IResourceChangeListener, ISelectionListener {

	/** The text editor used in page 0. */
	private IEditorPart editor;
	private TextEditor editor2;

	/**
	 * Creates a multi-page editor example.
	 */
	public MultiPageEditor() {
		super();
		ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
	}
	/**
	 * Creates page 0 of the multi-page editor,
	 * which contains a text editor.
	 */
	void createPage0() {
		try {
			editor = new DiagramEditor();
			int index = addPage(editor, getEditorInput());
			setPageText(index, editor.getTitle());
		} catch (PartInitException e) {
			ErrorDialog.openError(
				getSite().getShell(),
				"Error creating nested text editor",
				null,
				e.getStatus());
		}
	}
	/**
	 * Creates page 1 of the multi-page editor,
	 * which allows you to change the font used in page 2.
	 */
	void createPage1() {

		try {
			editor2 = new TextEditor();
			int index = addPage(editor2, getEditorInput());
			setPageText(index, editor2.getTitle());
		} catch (PartInitException e) {
			ErrorDialog.openError(getSite().getShell(), "Error creating nested text editor", null, e.getStatus());
		}
	}

	/**
	 * Creates the pages of the multi-page editor.
	 */
	protected void addPages() {
		createPage0();
		createPage1();
	}
	/**
	 * The <code>MultiPageEditorPart</code> implementation of this 
	 * <code>IWorkbenchPart</code> method disposes all nested editors.
	 * Subclasses may extend.
	 */
	public void dispose() {
		ResourcesPlugin.getWorkspace().removeResourceChangeListener(this);
		super.dispose();
	}
	/**
	 * Saves the multi-page editor's document.
	 */
	public void doSave(IProgressMonitor monitor) {
		getActiveEditor().doSave(monitor);
	}
	/**
	 * Saves the multi-page editor's document as another file.
	 * Also updates the text for page 0's tab, and updates this multi-page editor's input
	 * to correspond to the nested editor's.
	 */
	public void doSaveAs() {
		IEditorPart editor = getEditor(0);
		editor.doSaveAs();
		setPageText(0, editor.getTitle());
		setInput(editor.getEditorInput());
	}
	/* (non-Javadoc)
	 * Method declared on IEditorPart
	 */
	public void gotoMarker(IMarker marker) {
		setActivePage(0);
		IDE.gotoMarker(getEditor(0), marker);
	}
	/**
	 * The <code>MultiPageEditorExample</code> implementation of this method
	 * checks that the input is an instance of <code>IFileEditorInput</code>.
	 */
	public void init(IEditorSite site, IEditorInput editorInput)
		throws PartInitException {
		if (!(editorInput instanceof IFileEditorInput))
			throw new PartInitException("Invalid Input: Must be IFileEditorInput");
		super.init(site, editorInput);

		// Register this editor to get informed about selection changes (also
		// inside editor) to update e.g. the registered actions (see Bug 387971)
		getSite().getWorkbenchWindow().getSelectionService().addSelectionListener(this);
	}
	/* (non-Javadoc)
	 * Method declared on IEditorPart.
	 */
	public boolean isSaveAsAllowed() {
		return true;
	}
	/**
	 * Calculates the contents of page 2 when the it is activated.
	 */
	protected void pageChange(int newPageIndex) {
		super.pageChange(newPageIndex);
	}
	/**
	 * Closes all project files on project close.
	 */
	public void resourceChanged(final IResourceChangeEvent event){
		if(event.getType() == IResourceChangeEvent.PRE_CLOSE){
			Display.getDefault().asyncExec(new Runnable(){
				public void run(){
					IWorkbenchPage[] pages = getSite().getWorkbenchWindow().getPages();
					for (int i = 0; i<pages.length; i++){
						if(((FileEditorInput)editor.getEditorInput()).getFile().getProject().equals(event.getResource())){
							IEditorPart editorPart = pages[i].findEditor(editor.getEditorInput());
							pages[i].closeEditor(editorPart,true);
						}
					}
				}            
			});
		}
	}

	public void selectionChanged(IWorkbenchPart part, ISelection selection) {
		// Propagate the selection changed event to all sub editors
		int pageCount = getPageCount();
		for (int i = 0; i < pageCount; i++) {
			IEditorPart editor = getEditor(i);
			if (editor instanceof ISelectionListener) {
				((ISelectionListener) editor).selectionChanged(part, selection);
			}
		}
	}
}