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ASF GitHub Bot commented on WICKET-5827: ---------------------------------------- Github user klopfdreh commented on a diff in the pull request: https://github.com/apache/wicket/pull/87#discussion_r24095087 --- Diff: wicket-core/src/main/java/org/apache/wicket/resource/CssUrlReplacementCompressor.java --- @@ -0,0 +1,144 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.wicket.resource; + +import java.io.PrintWriter; +import java.io.StringWriter; +import java.net.URL; +import java.util.Collection; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.regex.Matcher; +import java.util.regex.Pattern; + +import org.apache.wicket.Application; +import org.apache.wicket.Component; +import org.apache.wicket.Page; +import org.apache.wicket.WicketRuntimeException; +import org.apache.wicket.application.IComponentInitializationListener; +import org.apache.wicket.css.ICssCompressor; +import org.apache.wicket.request.cycle.RequestCycle; +import org.apache.wicket.request.resource.PackageResourceReference; + +/** + * This compressor is used to replace url within css files with resources that belongs to their + * corresponding page classes. The compress method is not compressing any content, but replacing the + * URLs with Wicket representatives.<br> + * <br> + * Usage: + * + * <pre> + * this.getResourceSettings().setCssCompressor(new CssUrlReplacementCompressor(this)); + * </pre> + * + * @since 6.20.0 + * @author Tobias Soloschenko + * + */ +public class CssUrlReplacementCompressor implements ICssCompressor +{ + + // Holds the names of pages + private Map<String, String> pageNames = Collections.synchronizedMap(new LinkedHashMap<String, String>()); + + // The pattern to find URLs in CSS resources + private Pattern urlPattern = Pattern.compile("url\\(['|\"](.*)['|\"]\\)"); + + public CssUrlReplacementCompressor(Application application) + { + + // Create an instantiation listener which filters only pages. + application.getComponentInitializationListeners().add( + new IComponentInitializationListener() + { + + @Override + public void onInitialize(Component component) + { + if (Page.class.isAssignableFrom(component.getClass())) + { + CssUrlReplacementCompressor.this.pageNames.put(component.getClass() + .getName(), component.getClass().getSimpleName()); + } + } + }); + } + + /** + * Replaces the URLs of CSS resources with Wicket representatives. + */ + @SuppressWarnings("unchecked") + @Override + public String compress(String original) + { + Matcher matcher = this.urlPattern.matcher(original); + // Search for urls + while (matcher.find()) + { + Collection<String> pageNames = this.pageNames.keySet(); --- End diff -- Mhh, any other suggestions? - the matcher has to be applied once so that I can find all url positions. > Allow to apply multiple Javascript / CSS compressors > ---------------------------------------------------- > > Key: WICKET-5827 > URL: https://issues.apache.org/jira/browse/WICKET-5827 > Project: Wicket > Issue Type: New Feature > Components: wicket > Affects Versions: 6.20.0, 7.0.0-M6 > Reporter: Tobias Soloschenko > Priority: Minor > Labels: features > > It would be nice to be able to add several css and javascript compressions in > a chain. Example for CSS: > CssRemoveCommentsCompressor > CssUrlReplacementCompressor > > CssMinifyCompressor > The same would be nice for JavaScript files. > https://github.com/apache/wicket/pull/88 > https://github.com/apache/wicket/pull/87 -- This message was sent by Atlassian JIRA (v6.3.4#6332)