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/*******************************************************************************
* Copyright (c) 2000, 2019 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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();
}
@Override
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 output to find out failure.
*
* @param outputs
* @param errors
* @return
*/
private boolean errorsInOutput(StreamConsumer outputs, StreamConsumer errors) {
try {
outputs.join(1000);
if (outputs.getLastLine() != null
&& outputs.getLastLine().contains("no " + executable + " in")) {//$NON-NLS-1$ //$NON-NLS-2$
return true;
}
errors.join(1000);
if (errors.getLastLine() != null
&& errors.getLastLine().contains("no " + executable + " in")) { //$NON-NLS-1$ //$NON-NLS-2$
return true;
}
} catch (InterruptedException ie) {
// ignore
}
return false;
}
@Override
public IBrowser createBrowser() {
// Create single browser for all clients
if (browserInstance == null) {
browserInstance = new MozillaBrowserAdapter(executable,
executableName);
}
return browserInstance;
}
@Override
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;
}
}
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