| /* |
| * 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.ode.utils.cli; |
| |
| import java.util.StringTokenizer; |
| |
| |
| public class ConsoleFormatter { |
| |
| private static final int LINE_WIDTH = 76; |
| |
| // for help |
| private static final int LEFT_MARGIN = 20; |
| |
| private static String spaces(int n) { |
| StringBuffer sb = new StringBuffer(n); |
| for (int i=0; i < n; ++i) { |
| sb.append(' '); |
| } |
| return sb.toString(); |
| } |
| |
| // long command name is a pathological case, which we'll ignore. |
| public static String formatUsage(String command, Fragments f) { |
| StringBuffer sb = new StringBuffer(command + " "); |
| String spaces = spaces(command.length() + 1); |
| int currentLineLength = sb.length(); |
| CommandlineFragment[] ff = f.getFragmentsInUserOrder(); |
| for (int i=0; i< ff.length; ++i) { |
| String u = ff[i].getUsage(); |
| if (ff[i].isOptional()) { |
| u = "[" + u + "]"; |
| } |
| if (currentLineLength != spaces.length() |
| && currentLineLength + u.length() >= LINE_WIDTH) |
| { |
| sb.append("\n"); |
| sb.append(spaces); |
| currentLineLength = spaces.length(); |
| } |
| if (currentLineLength != spaces.length()) { |
| u = ' ' + u; |
| } |
| sb.append(u); |
| currentLineLength += u.length(); |
| } |
| return sb.toString(); |
| } |
| |
| public static String formatHelp(Fragments f) { |
| CommandlineFragment[] ff = f.getFragmentsInUserOrder(); |
| StringBuffer sb = new StringBuffer(); |
| String spaces = spaces(LEFT_MARGIN); |
| for (int i=0; i < ff.length; ++i) { |
| String u = ff[i].getUsage(); |
| if (u.length() > LEFT_MARGIN) { |
| sb.append(u); |
| sb.append('\n'); |
| sb.append(spaces); |
| } else { |
| sb.append(rightPadToWidth(u,LEFT_MARGIN)); |
| } |
| sb.append(wrap(ff[i].getDescription(), LEFT_MARGIN)); |
| } |
| return sb.toString(); |
| } |
| |
| public static String rightPadToWidth(String s, int w) { |
| if (s.length() > w) { |
| return s; |
| } else { |
| return s + spaces(w-s.length()); |
| } |
| } |
| |
| public static String wrap(String s, int left) { |
| String spaces = spaces(left); |
| int cll = left; |
| StringBuffer sb = new StringBuffer(); |
| for (StringTokenizer st = new StringTokenizer(s);st.hasMoreTokens();) { |
| String t = st.nextToken(); |
| if (cll != left && cll + t.length() > LINE_WIDTH) { |
| sb.append('\n'); |
| sb.append(spaces); |
| cll = left; |
| } |
| if (cll != left) { |
| t = ' ' + t; |
| } |
| sb.append(t); |
| cll += t.length(); |
| } |
| sb.append('\n'); |
| return sb.toString(); |
| } |
| |
| public static void printSynopsis(String command, String synposis, Fragments[] frags) { |
| System.out.print(command + " - "); |
| System.out.println(wrap(synposis, command.length() + 3)); |
| for (int i=0; i < frags.length; ++i) { |
| System.out.println(formatUsage(command,frags[i])); |
| System.out.println(formatHelp(frags[i])); |
| } |
| } |
| } |