| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.google.gwt.resources.css; |
| |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.dev.util.DefaultTextOutput; |
| import com.google.gwt.dev.util.TextOutput; |
| import com.google.gwt.dev.util.log.PrintWriterTreeLogger; |
| import com.google.gwt.resources.css.ast.CssStylesheet; |
| import com.google.gwt.util.tools.ArgHandlerExtra; |
| import com.google.gwt.util.tools.ArgHandlerFlag; |
| import com.google.gwt.util.tools.ToolBase; |
| |
| import java.io.File; |
| import java.io.PrintWriter; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| |
| /** |
| * This is a command-line utility to minify a GWT CSS stylesheet. |
| */ |
| public class Minify extends ToolBase { |
| |
| private class ArgHandlerOutputReadable extends ArgHandlerFlag { |
| |
| @Override |
| public String getPurposeSnippet() { |
| return "Output human readable CSS."; |
| } |
| |
| @Override |
| public String getLabel() { |
| return "pretty"; |
| } |
| |
| @Override |
| public boolean setFlag(boolean enabled) { |
| return pretty = enabled; |
| } |
| |
| @Override |
| public boolean getDefaultValue() { |
| return pretty; |
| } |
| } |
| |
| /** |
| * See {@link #printHelp()} for usage. |
| */ |
| public static void main(String[] args) { |
| Minify m = new Minify(); |
| if (m.exec(args)) { |
| System.exit(0); |
| } else { |
| System.exit(-1); |
| } |
| } |
| |
| private final PrintWriterTreeLogger logger = new PrintWriterTreeLogger( |
| new PrintWriter(System.err)); |
| private URL source; |
| private boolean pretty; |
| |
| private Minify() { |
| logger.setMaxDetail(TreeLogger.DEBUG); |
| } |
| |
| @Override |
| protected String getDescription() { |
| return "Minify a CSS file"; |
| } |
| |
| private boolean exec(String[] args) { |
| registerHandler(new ArgHandlerExtra() { |
| |
| @Override |
| public boolean addExtraArg(String arg) { |
| if (source != null) { |
| return false; |
| } |
| |
| try { |
| source = (new File(arg)).toURL(); |
| return true; |
| } catch (MalformedURLException e) { |
| e.printStackTrace(); |
| return false; |
| } |
| } |
| |
| @Override |
| public String getPurpose() { |
| return "The css file to process"; |
| } |
| |
| @Override |
| public String[] getTagArgs() { |
| return new String[] {"stylesheet.css"}; |
| } |
| }); |
| |
| registerHandler(new ArgHandlerOutputReadable()); |
| |
| if (!processArgs(args)) { |
| return false; |
| } |
| |
| if (source == null) { |
| printHelp(); |
| return false; |
| } |
| |
| try { |
| CssStylesheet sheet = GenerateCssAst.exec(logger, source); |
| TextOutput out = new DefaultTextOutput(!pretty); |
| (new CssGenerationVisitor(out)).accept(sheet); |
| System.out.println(out.toString()); |
| } catch (UnableToCompleteException e) { |
| logger.log(TreeLogger.ERROR, "Unable to compile CSS"); |
| } |
| |
| return true; |
| } |
| } |