Java tutorial
/* ****************************************************************************** * Copyright (c) 2006-2012 XMind Ltd. and others. * * This file is a part of XMind 3. XMind releases 3 and * above are dual-licensed under the Eclipse Public License (EPL), * which is available at http://www.eclipse.org/legal/epl-v10.html * and the GNU Lesser General Public License (LGPL), * which is available at http://www.gnu.org/licenses/lgpl.html * See http://www.xmind.net/license.html for details. * * Contributors: * XMind Ltd. - initial API and implementation *******************************************************************************/ package org.xmind.ui.browser; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.util.Util; import org.eclipse.swt.SWT; import org.eclipse.swt.SWTError; import org.eclipse.swt.browser.Browser; import org.eclipse.swt.browser.LocationEvent; import org.eclipse.swt.browser.LocationListener; import org.eclipse.swt.browser.StatusTextEvent; import org.eclipse.swt.browser.StatusTextListener; import org.eclipse.swt.browser.TitleEvent; import org.eclipse.swt.browser.TitleListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; 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.ui.PartInitException; /** * @author briansun */ public abstract class BrowserDialog extends Dialog { protected static final String COMMAND_PROTOCOL = "xmind://"; //$NON-NLS-1$ protected static final String COMMAND_CANCEL = "cancel"; //$NON-NLS-1$ protected static final String COMMAND_SKIP = "skip"; //$NON-NLS-1$ protected static final String COMMAND_OPEN = "open"; //$NON-NLS-1$ private class BrowserListener implements StatusTextListener, TitleListener, LocationListener { /** * @see org.eclipse.swt.browser.StatusTextListener#changed(org.eclipse.swt.browser.StatusTextEvent) */ public void changed(StatusTextEvent event) { checkCommand(event.text); } /** * @see org.eclipse.swt.browser.TitleListener#changed(org.eclipse.swt.browser.TitleEvent) */ public void changed(TitleEvent event) { String t = event.title; if (t != null && t.startsWith("xmind:")) //$NON-NLS-1$ browser.getShell().setText(t.substring(6)); } /** * @see org.eclipse.swt.browser.LocationListener#changed(org.eclipse.swt.browser.LocationEvent) */ public void changed(LocationEvent event) { } /** * @see org.eclipse.swt.browser.LocationListener#changing(org.eclipse.swt.browser.LocationEvent) */ public void changing(LocationEvent event) { if (checkCommand(event.location)) event.doit = false; } private boolean checkCommand(String href) { if (href.startsWith(COMMAND_PROTOCOL)) { String commandLine = href.substring(COMMAND_PROTOCOL.length()); return execCommandLine(commandLine); } return false; } } private Browser browser; private BrowserListener browserListener = new BrowserListener(); /** * @param parentWindow */ public BrowserDialog(Shell parent) { super(parent); } /** * @see org.eclipse.jface.dialogs.Dialog#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite parent) { try { browser = new Browser(parent, SWT.MOZILLA); } catch (SWTError e) { browser = new Browser(parent, SWT.NONE); } browser.setLayoutData(new GridData(GridData.FILL_BOTH)); browser.addStatusTextListener(browserListener); browser.addTitleListener(browserListener); browser.addLocationListener(browserListener); String text = getInitialText(); if (text != null) browser.setText(text); else { String url = getInitialURL(); if (url != null) browser.setUrl(url); } if (Util.isMac()) browser.refresh(); return browser; } protected Browser getBrowser() { return browser; } /** * @see org.eclipse.jface.dialogs.Dialog#getInitialSize() */ @Override protected Point getInitialSize() { return new Point(500, 325); } /** * @see org.eclipse.jface.dialogs.Dialog#getInitialLocation(org.eclipse.swt.graphics.Point) */ @Override protected Point getInitialLocation(Point initialSize) { Rectangle r = Display.getCurrent().getClientArea(); return new Point((r.width - initialSize.x) / 2, (r.height - initialSize.y) / 2); } /** * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) */ @Override protected void createButtonsForButtonBar(Composite parent) { // use html buttons } protected String getInitialText() { return null; } protected String getInitialURL() { return null; } protected boolean execCommandLine(String commandLine) { String[] commands = commandLine.split("/"); //$NON-NLS-1$ if (commands.length > 1) { String commandName = commands[0]; String[] params = new String[commands.length - 1]; System.arraycopy(commands, 1, params, 0, commands.length - 1); return execCommand(commandName, params); } return false; } protected boolean execCommand(String commandName, String[] params) { if (COMMAND_CANCEL.equals(commandName)) { return performCancel(); } else if (COMMAND_SKIP.equals(commandName)) { return performSkip(); } else if (COMMAND_OPEN.equals(commandName)) { return performOpen(params); } return false; } protected boolean performOpen(String[] params) { if (params.length > 0) { String url = params[0]; try { url = URLDecoder.decode(url, "utf-8"); //$NON-NLS-1$ } catch (UnsupportedEncodingException e) { } try { BrowserSupport.getInstance().createBrowser().openURL(url); return true; } catch (PartInitException e) { // TODO handle this } } return false; } protected boolean performSkip() { setReturnCode(IDialogConstants.CLOSE_ID); return super.close(); } protected boolean performCancel() { setReturnCode(CANCEL); return super.close(); } }