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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.util.ArrayList;
import java.util.StringTokenizer;
import org.eclipse.core.runtime.*;
import org.eclipse.help.browser.*;
import org.eclipse.help.internal.base.*;
import org.eclipse.osgi.service.environment.*;
import org.eclipse.osgi.util.NLS;
public class CustomBrowser implements IBrowser {
public static final String CUSTOM_BROWSER_PATH_KEY = "custom_browser_path"; //$NON-NLS-1$
@Override
public void close() {
}
@Override
public boolean isCloseSupported() {
return false;
}
@Override
public void displayURL(String url) throws Exception {
String path = Platform.getPreferencesService().getString
(HelpBasePlugin.PLUGIN_ID, CustomBrowser.CUSTOM_BROWSER_PATH_KEY, "", null); //$NON-NLS-1$
String[] command = prepareCommand(path, url);
try {
Process pr = Runtime.getRuntime().exec(command);
Thread outConsumer = new StreamConsumer(pr.getInputStream());
outConsumer.setName("Custom browser adapter output reader"); //$NON-NLS-1$
outConsumer.start();
Thread errConsumer = new StreamConsumer(pr.getErrorStream());
errConsumer.setName("Custom browser adapter error reader"); //$NON-NLS-1$
errConsumer.start();
} catch (Exception e) {
HelpBasePlugin
.logError(
"Launching URL \"" //$NON-NLS-1$
+ url
+ "\" using browser program \"" //$NON-NLS-1$
+ path
+ "\" has failed. Specify another browser in help preferences.", //$NON-NLS-1$
e);
throw new Exception(NLS.bind(HelpBaseResources.CustomBrowser_errorLaunching, url, path));
}
}
@Override
public boolean isSetLocationSupported() {
return false;
}
@Override
public boolean isSetSizeSupported() {
return false;
}
@Override
public void setLocation(int x, int y) {
}
@Override
public void setSize(int width, int height) {
}
/**
* Creates the final command to launch.
*
* @param path
* @param url
* @return String[]
*/
private String[] prepareCommand(String path, String url) {
ArrayList<String> tokenList = new ArrayList<>();
//Divide along quotation marks
StringTokenizer qTokenizer = new StringTokenizer(path.trim(),
"\"", true); //$NON-NLS-1$
boolean withinQuotation = false;
String quotedString = ""; //$NON-NLS-1$
while (qTokenizer.hasMoreTokens()) {
String curToken = qTokenizer.nextToken();
if (curToken.equals("\"")) { //$NON-NLS-1$
if (withinQuotation) {
if (Constants.OS_WIN32.equalsIgnoreCase(Platform.getOS())) {
// need to quote URLs on Windows
tokenList.add("\"" + quotedString + "\""); //$NON-NLS-1$ //$NON-NLS-2$
} else {
// qotes prevent launching on Unix 35673
tokenList.add(quotedString);
}
} else {
quotedString = ""; //$NON-NLS-1$
}
withinQuotation = !withinQuotation;
continue;
} else if (withinQuotation) {
quotedString = curToken;
continue;
} else {
//divide unquoted strings along white space
StringTokenizer parser = new StringTokenizer(curToken.trim());
while (parser.hasMoreTokens()) {
tokenList.add(parser.nextToken());
}
}
}
// substitute %1 by url
boolean substituted = false;
for (int i = 0; i < tokenList.size(); i++) {
String token = tokenList.get(i);
String newToken = doSubstitutions(token, url);
if (newToken != null) {
tokenList.set(i, newToken);
substituted = true;
}
}
// add the url if not substituted already
if (!substituted)
tokenList.add(url);
String[] command = new String[tokenList.size()];
tokenList.toArray(command);
return command;
}
/**
* Replaces any occurrences of <code>"%1"</code> or <code>%1</code> with
* the URL.
*
* @param token
* The token in which the substitutions should be made; must not
* be <code>null</code>.
* @return The substituted string, if a substitution is made;
* <code>null</code> if no substitution is made.
*/
private String doSubstitutions(String token, String url) {
boolean substituted = false;
StringBuilder newToken = new StringBuilder(token);
String substitutionMarker = "%1"; //$NON-NLS-1$
int index = newToken.indexOf(substitutionMarker);
while (index != -1) {
newToken.replace(index, index + substitutionMarker.length(), url);
index = newToken.indexOf(substitutionMarker, index + url.length());
substituted = true;
}
if (substituted) {
return newToken.toString();
}
return null;
}
}
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