| /* |
| * [The "BSD licence"] |
| * Copyright (c) 2010 Ben Gruver |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.jf.util; |
| |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| public class ConsoleUtil { |
| /** |
| * Attempt to find the width of the console. If it can't get the width, return a default of 80 |
| * @return The current console width |
| */ |
| public static int getConsoleWidth() { |
| if (System.getProperty("os.name").toLowerCase().contains("windows")) { |
| try { |
| return attemptMode(); |
| } catch (Exception ex) { |
| } |
| } else { |
| try { |
| return attemptStty(); |
| } catch (Exception ex) { |
| } |
| } |
| |
| return 80; |
| } |
| |
| private static int attemptStty() { |
| String output = attemptCommand(new String[]{"sh", "-c", "stty size < /dev/tty"}); |
| if (output == null) { |
| return 80; |
| } |
| |
| String[] vals = output.split(" "); |
| if (vals.length < 2) { |
| return 80; |
| } |
| return Integer.parseInt(vals[1]); |
| } |
| |
| private static int attemptMode() { |
| String output = attemptCommand(new String[]{"mode", "con"}); |
| if (output == null) { |
| return 80; |
| } |
| |
| Pattern pattern = Pattern.compile("Columns:[ \t]*(\\d+)"); |
| Matcher m = pattern.matcher(output); |
| if (!m.find()) { |
| return 80; |
| } |
| |
| return Integer.parseInt(m.group(1)); |
| } |
| |
| private static String attemptCommand(String[] command) { |
| StringBuffer buffer = null; |
| |
| try { |
| |
| Process p = Runtime.getRuntime().exec(command); |
| BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream())); |
| |
| String line; |
| |
| while ((line = reader.readLine()) != null) { |
| if (buffer == null) { |
| buffer = new StringBuffer(); |
| } |
| |
| buffer.append(line); |
| } |
| |
| if (buffer != null) { |
| return buffer.toString(); |
| } |
| return null; |
| } catch (Exception ex) { |
| return null; |
| } |
| } |
| } |