tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug510905_Browser_JsConsole.java

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 * Copyright (c) 2018 Red Hat and others. All rights reserved.
 * The contents of this file are made available under the terms
 * of the GNU Lesser General Public License (LGPL) Version 2.1 that
 * accompanies this distribution (lgpl-v21.txt).  The LGPL is also
 * available at http://www.gnu.org/licenses/lgpl.html.  If the version
 * of the LGPL at http://www.gnu.org is different to the version of
 * the LGPL accompanying this distribution and there is any conflict
 * between the two license versions, the terms of the LGPL accompanying
 * this distribution shall govern.
 *
 * Contributors:
 *     Red Hat - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.tests.gtk.snippets;

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.BrowserFunction;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/*
 * Title:  [GTK3][Webkit2] Implement webkit2 support for browser function (Part 2: Java return a value from callback.)
 * How to run: Snippet to execute javascript via input prompt, to test Browser Func return value ability.
 * Bug description:
 * Expected results:
 * GTK Version(s):
 */
public class Bug510905_Browser_JsConsole {

	static int count = 0;

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setSize(500, 600);

		GridLayout gridLayout = new GridLayout();
		shell.setLayout(gridLayout);

		final Text jsConsole = new Text(shell, SWT.BORDER);
//		jsConsole.setText("document.body.innerHTML = theJavaFunction(123, 'hello', null, true)");
		jsConsole.setText("document.body.innerHTML = theJavaFunction()"); // Case where there are no paramaters.
		jsConsole.setSelection(jsConsole.getText().length());
		GridData data = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
		jsConsole.setLayoutData(data);

		final Browser browser = new Browser(shell, SWT.NONE);
		browser.setText("hello <b>world!</b>");
		data = new GridData(SWT.FILL, SWT.FILL, true, true);
		browser.setLayoutData(data);

		jsConsole.addKeyListener(new KeyAdapter() {
			@Override
			public void keyPressed(KeyEvent e) {
				if (e.keyCode == 13) { // 13 = Enter
					browser.execute(jsConsole.getText());
				}
			}
		});

		Button loadNewPage = new Button(shell, SWT.PUSH);
		loadNewPage.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));
		loadNewPage.setText("Load new Page");
		loadNewPage.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				browser.setText("New page!" + count++);
			}
		});


		// BrowserFunction Code
		@SuppressWarnings("unused")
		final BrowserFunction function = new CustomFunction (browser, "theJavaFunction");

		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

	static class CustomFunction extends BrowserFunction { // copied from snippet 307
		CustomFunction (Browser browser, String name) {
			super (browser, name);
		}
		@Override
		public Object function (Object[] arguments) {
			System.out.println ("theJavaFunction() called from javascript with args:");
			for (int i = 0; i < arguments.length; i++) {
				Object arg = arguments[i];
				if (arg == null) {
					System.out.println ("\t-->null");
				} else {
					System.out.println ("\t-->" + arg.getClass ().getName () + ": " + arg.toString ());
				}
			}
			return arguments;
//			return new Point(1, 2);

//			Object returnValue = new Object[] {
//					new Short ((short)3),
//					new Boolean (true),
//					null,
//					new Object[] {"a string", new Boolean (false)},
//					"hi",
//					new Float (2.0f / 3.0f),
//				};
//			return returnValue;

//			return new Double(42.0);
		}
	}
}