| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.help.internal.browser; |
| |
| import java.io.*; |
| import java.util.Hashtable; |
| import java.util.Locale; |
| |
| import org.eclipse.core.runtime.*; |
| import org.eclipse.help.browser.*; |
| import org.eclipse.help.internal.base.*; |
| |
| |
| /** |
| * Browser factory for Linux-based operating systems. |
| */ |
| public class MozillaFactory implements IBrowserFactory, IExecutableExtension { |
| private String executable; |
| private String executableName; |
| private String osList; |
| private MozillaBrowserAdapter browserInstance = null; |
| /** |
| * Constructor. |
| */ |
| public MozillaFactory() { |
| super(); |
| } |
| /* |
| * @see IBrowserFactory#isAvailable() |
| */ |
| public boolean isAvailable() { |
| if (!isSupportedOS(System.getProperty("os.name"))) { //$NON-NLS-1$ |
| return false; |
| } |
| try { |
| Process pr = Runtime.getRuntime().exec("which " + executable); //$NON-NLS-1$ |
| StreamConsumer outputs = new StreamConsumer(pr.getInputStream()); |
| (outputs).start(); |
| StreamConsumer errors = new StreamConsumer(pr.getErrorStream()); |
| (errors).start(); |
| pr.waitFor(); |
| int ret = pr.exitValue(); |
| if (ret == 0) { |
| return !errorsInOutput(outputs, errors); |
| } |
| return false; |
| } catch (InterruptedException e) { |
| return false; |
| } catch (IOException e) { |
| // launching which failed, assume browser executable is present |
| return true; |
| } |
| } |
| /** |
| * On some OSes 0 is always returned by "which" command it is necessary to |
| * examine ouput to find out failure. |
| * |
| * @param outputs |
| * @param errors |
| * @return @throws |
| * InterruptedException |
| */ |
| private boolean errorsInOutput(StreamConsumer outputs, StreamConsumer errors) { |
| try { |
| outputs.join(1000); |
| if (outputs.getLastLine() != null |
| && outputs.getLastLine() |
| .indexOf("no " + executable + " in") //$NON-NLS-1$ //$NON-NLS-2$ |
| >= 0) { |
| return true; |
| } |
| errors.join(1000); |
| if (errors.getLastLine() != null |
| && errors.getLastLine().indexOf("no " + executable + " in") //$NON-NLS-1$ //$NON-NLS-2$ |
| >= 0) { |
| return true; |
| } |
| } catch (InterruptedException ie) { |
| // ignore |
| } |
| return false; |
| } |
| /* |
| * @see IBrowserFactory#createBrowser() |
| */ |
| public IBrowser createBrowser() { |
| // Create single browser for all clients |
| if (browserInstance == null) { |
| browserInstance = new MozillaBrowserAdapter(executable, |
| executableName); |
| } |
| return browserInstance; |
| } |
| /** |
| * @see org.eclipse.core.runtime.IExecutableExtension#setInitializationData(org.eclipse.core.runtime.IConfigurationElement, |
| * java.lang.String, java.lang.Object) |
| */ |
| public void setInitializationData(IConfigurationElement config, |
| String propertyName, Object data) throws CoreException { |
| try { |
| Hashtable<?, ?> params = (Hashtable<?, ?>) data; |
| executable = (String) params.get("executable"); //$NON-NLS-1$ |
| executableName = (String) params.get("executableName"); //$NON-NLS-1$ |
| osList = (String) params.get("os"); //$NON-NLS-1$ |
| } catch (Exception e) { |
| throw new CoreException(new Status(IStatus.ERROR, |
| HelpBasePlugin.PLUGIN_ID, IStatus.OK, HelpBaseResources.MozillaFactory_dataMissing, |
| e)); |
| } |
| } |
| private boolean isSupportedOS(String os) { |
| if (osList == null || osList.length() <= 0) { |
| // parameter missing |
| return false; |
| } |
| String[] OSes = osList.split(",\\s*"); //$NON-NLS-1$ |
| for (int i = 0; i < OSes.length; i++) { |
| if (os.toLowerCase(Locale.ENGLISH).startsWith(OSes[i].toLowerCase(Locale.ENGLISH))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |