content: /*
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
   ~                                                                               ~
   ~ The MIT License (MIT)                                                         ~
   ~                                                                               ~
   ~ Copyright (c) 2015-2025 miaixz.org OSHI and other contributors.               ~
   ~                                                                               ~
   ~ Permission is hereby granted, free of charge, to any person obtaining a copy  ~
   ~ of this software and associated documentation files (the "Software"), to deal ~
   ~ in the Software without restriction, including without limitation the rights  ~
   ~ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     ~
   ~ copies of the Software, and to permit persons to whom the Software is         ~
   ~ furnished to do so, subject to the following conditions:                      ~
   ~                                                                               ~
   ~ The above copyright notice and this permission notice shall be included in    ~
   ~ all copies or substantial portions of the Software.                           ~
   ~                                                                               ~
   ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    ~
   ~ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      ~
   ~ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   ~
   ~ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        ~
   ~ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, ~
   ~ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     ~
   ~ THE SOFTWARE.                                                                 ~
   ~                                                                               ~
   ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
  */
  package org.miaixz.bus.health.unix.driver;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import org.miaixz.bus.core.lang.annotation.ThreadSafe;
  import org.miaixz.bus.core.xyz.ByteKit;
  import org.miaixz.bus.health.Executor;
  
  /**
   * Utility to query xrandr
   *
   * @author Kimi Liu
   * @since Java 17+
   */
  @ThreadSafe
  public final class Xrandr {
  
      private static final String[] XRANDR_VERBOSE = { "xrandr", "--verbose" };
  
      private Xrandr() {
      }
  
      public static List<byte[]> getEdidArrays() {
          // Special handling for X commands, don't use LC_ALL
          List<String> xrandr = Executor.runNative(XRANDR_VERBOSE, null);
          // xrandr reports edid in multiple lines. After seeing a line containing
          // EDID, read subsequent lines of hex until 256 characters are reached
          if (xrandr.isEmpty()) {
              return Collections.emptyList();
          }
          List<byte[]> displays = new ArrayList<>();
          StringBuilder sb = null;
          for (String s : xrandr) {
              if (s.contains("EDID")) {
                  sb = new StringBuilder();
              } else if (sb != null) {
                  sb.append(s.trim());
                  if (sb.length() < 256) {
                      continue;
                  }
                  String edidStr = sb.toString();
                  byte[] edid = ByteKit.hexStringToByteArray(edidStr);
                  if (edid.length >= 128) {
                      displays.add(edid);
                  }
                  sb = null;
              }
          }
          return displays;
      }
  
  }
  