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/*
* Copyright 2011 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.server.widgetsetutils;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.Reader;
import java.net.URL;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Helper class to update widgetsets GWT module configuration file. Can be used
* command line or via IDE tools.
*
* <p>
* If module definition file contains text "WS Compiler: manually edited", tool
* will skip editing file.
*
*/
public class WidgetSetBuilder {
public static void main(String[] args) throws IOException {
if (args.length == 0) {
printUsage();
} else {
String widgetsetname = args[0];
updateWidgetSet(widgetsetname);
}
}
public static void updateWidgetSet(final String widgetset)
throws IOException, FileNotFoundException {
boolean changed = false;
Map<String, URL> availableWidgetSets = ClassPathExplorer
.getAvailableWidgetSets();
URL sourceUrl = availableWidgetSets.get(widgetset);
if (sourceUrl == null) {
// find first/default source directory
sourceUrl = ClassPathExplorer.getDefaultSourceDirectory();
}
String widgetsetfilename = sourceUrl.getFile() + "/"
+ widgetset.replace(".", "/") + ".gwt.xml";
File widgetsetFile = new File(widgetsetfilename);
if (!widgetsetFile.exists()) {
// create empty gwt module file
File parent = widgetsetFile.getParentFile();
if (parent != null && !parent.exists()) {
if (!parent.mkdirs()) {
throw new IOException(
"Could not create directory for the widgetset: "
+ parent.getPath());
}
}
widgetsetFile.createNewFile();
PrintStream printStream = new PrintStream(new FileOutputStream(
widgetsetFile));
printStream.print("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
+ "<!DOCTYPE module PUBLIC \"-//Google Inc.//DTD "
+ "Google Web Toolkit 1.7.0//EN\" \"http://google"
+ "-web-toolkit.googlecode.com/svn/tags/1.7.0/dis"
+ "tro-source/core/src/gwt-module.dtd\">\n");
printStream.print("<module>\n");
printStream
.print(" <!--\n"
+ " Uncomment the following to compile the widgetset for one browser only.\n"
+ " This can reduce the GWT compilation time significantly when debugging.\n"
+ " The line should be commented out before deployment to production\n"
+ " environments.\n\n"
+ " Multiple browsers can be specified for GWT 1.7 as a comma separated\n"
+ " list. The supported user agents at the moment of writing were:\n"
+ " ie6,ie8,gecko,gecko1_8,safari,opera\n\n"
+ " The value gecko1_8 is used for Firefox 3 and later and safari is used for\n"
+ " webkit based browsers including Google Chrome.\n"
+ " -->\n"
+ " <!-- <set-property name=\"user.agent\" value=\"gecko1_8\"/> -->\n");
printStream.print("\n</module>\n");
printStream.close();
changed = true;
}
String content = readFile(widgetsetFile);
if (isEditable(content)) {
String originalContent = content;
Collection<String> oldInheritedWidgetsets = getCurrentInheritedWidgetsets(content);
// add widgetsets that do not exist
Iterator<String> i = availableWidgetSets.keySet().iterator();
while (i.hasNext()) {
String ws = i.next();
if (ws.equals(widgetset)) {
// do not inherit the module itself
continue;
}
if (!oldInheritedWidgetsets.contains(ws)) {
content = addWidgetSet(ws, content);
}
}
for (String ws : oldInheritedWidgetsets) {
if (!availableWidgetSets.containsKey(ws)) {
// widgetset not available in classpath
content = removeWidgetSet(ws, content);
}
}
changed = changed || !content.equals(originalContent);
if (changed) {
commitChanges(widgetsetfilename, content);
}
} else {
System.out
.println("Widgetset is manually edited. Skipping updates.");
}
}
private static boolean isEditable(String content) {
return !content.contains("WS Compiler: manually edited");
}
private static String removeWidgetSet(String ws, String content) {
return content.replaceFirst("<inherits name=\"" + ws + "\"[^/]*/>", "");
}
private static void commitChanges(String widgetsetfilename, String content)
throws IOException {
BufferedWriter bufferedWriter = new BufferedWriter(
new OutputStreamWriter(new FileOutputStream(widgetsetfilename)));
bufferedWriter.write(content);
bufferedWriter.close();
}
private static String addWidgetSet(String ws, String content) {
return content.replace("</module>", "\n <inherits name=\"" + ws
+ "\" />" + "\n</module>");
}
private static Collection<String> getCurrentInheritedWidgetsets(
String content) {
HashSet<String> hashSet = new HashSet<String>();
Pattern inheritsPattern = Pattern.compile(" name=\"([^\"]*)\"");
Matcher matcher = inheritsPattern.matcher(content);
while (matcher.find()) {
String gwtModule = matcher.group(1);
if (isWidgetset(gwtModule)) {
hashSet.add(gwtModule);
}
}
return hashSet;
}
static boolean isWidgetset(String gwtModuleName) {
return gwtModuleName.toLowerCase().contains("widgetset");
}
private static String readFile(File widgetsetFile) throws IOException {
Reader fi = new FileReader(widgetsetFile);
BufferedReader bufferedReader = new BufferedReader(fi);
StringBuilder sb = new StringBuilder();
String line;
while ((line = bufferedReader.readLine()) != null) {
sb.append(line);
sb.append("\n");
}
fi.close();
return sb.toString();
}
private static void printUsage() {
PrintStream o = System.out;
o.println(WidgetSetBuilder.class.getSimpleName() + " usage:");
o.println(" 1. Set the same classpath as you will "
+ "have for the GWT compiler.");
o.println(" 2. Give the widgetsetname (to be created or updated)"
+ " as first parameter");
o.println();
o.println("All found vaadin widgetsets will be inherited in given widgetset");
}
}
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