bundles/org.eclipse.e4.tools.emf.ui.script.js/src/org/eclipse/e4/tools/emf/ui/script/js/JavaScriptSupport.java

/*******************************************************************************
 * Copyright (c) 2011 BestSolution.at 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.script.js;

import java.util.Map;

import org.eclipse.e4.tools.emf.ui.common.IScriptingSupport;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Widget;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;

public class JavaScriptSupport implements IScriptingSupport {
	public void openEditor(Shell shell, final Object mainElement, final Map<String, Object> additionalData) {
		TitleAreaDialog dialog = new TitleAreaDialog(shell) {
			private Text scriptField;

			@Override
			protected Control createDialogArea(Composite parent) {
				Composite container = (Composite) super.createDialogArea(parent);
				getShell().setText("Execute JavaScript");
				setTitle("Execute JavaScript");
				setMessage("Enter some JavaScript and execute it");
				scriptField = new Text(container, SWT.BORDER | SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL);
				scriptField.setLayoutData(new GridData(GridData.FILL_BOTH));
				scriptField.setFont(JFaceResources.getTextFont());
				return container;
			}
			
			@Override
			protected void okPressed() {
				execute(mainElement, additionalData, scriptField.getText());
			}
			
			@Override
			protected Button createButton(Composite parent, int id,
					String label, boolean defaultButton) {
				return super.createButton(parent, id, id == IDialogConstants.OK_ID ? "Execute" : label, defaultButton);
			}
		};
		
		dialog.open();
	}

	private void execute(Object mainElement, Map<String, Object> additionalData, String script) {
		Context cx = Context.enter();
		Scriptable sc = cx.initStandardObjects();
		
		ScriptableObject.putProperty(sc, "mainObject", mainElement);
		ScriptableObject.putProperty(sc, "additionalData", additionalData);
		ScriptableObject.putProperty(sc, "swt", new SWTSupport(Display.getCurrent()));
		cx.evaluateString(sc, script, "<cmd>", 1, null);
	}
	
	public static class SWTSupport {
		private Display d;
		
		public static SWT SWT = new SWT();
		
		public SWTSupport(Display d) {
			this.d = d;
		}
		
		public Color newColor(String color) {
			if( color.startsWith("#") ) {
				if( color.length() == 7 ) {
					return new Color(d, new RGB(
							Integer.parseInt(color.substring(1,3), 16),
							Integer.parseInt(color.substring(3,5), 16),
							Integer.parseInt(color.substring(5,7), 16)));
				} else {
					return new Color(d, new RGB(
							Integer.parseInt( color.charAt(1) + "" +color.charAt(1), 16),
							Integer.parseInt( color.charAt(2) + "" +color.charAt(2), 16),
							Integer.parseInt( color.charAt(3) + "" +color.charAt(3), 16)));
				}
			}
			return null;
		}
		
		public Widget newText(Composite parent, int style) {
			return new Text(parent, style);
		}
	}
}