content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * 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.amnesica.kryptey.inputmethod.latin.utils;
  
  import android.util.Log;
  
  import com.amnesica.kryptey.inputmethod.latin.define.DebugFlags;
  
  /**
   * A class for logging and debugging utility methods.
   */
  public final class DebugLogUtils {
    private final static String TAG = DebugLogUtils.class.getSimpleName();
    private final static boolean sDBG = DebugFlags.DEBUG_ENABLED;
  
    /**
     * Calls .toString() on its non-null argument or returns "null"
     *
     * @param o the object to convert to a string
     * @return the result of .toString() or null
     */
    public static String s(final Object o) {
      return null == o ? "null" : o.toString();
    }
  
    /**
     * Get the string representation of the current stack trace, for debugging purposes.
     *
     * @return a readable, carriage-return-separated string for the current stack trace.
     */
    public static String getStackTrace() {
      return getStackTrace(Integer.MAX_VALUE - 1);
    }
  
    /**
     * Get the string representation of the current stack trace, for debugging purposes.
     *
     * @param limit the maximum number of stack frames to be returned.
     * @return a readable, carriage-return-separated string for the current stack trace.
     */
    public static String getStackTrace(final int limit) {
      final StringBuilder sb = new StringBuilder();
      try {
        throw new RuntimeException();
      } catch (final RuntimeException e) {
        final StackTraceElement[] frames = e.getStackTrace();
        // Start at 1 because the first frame is here and we don't care about it
        for (int j = 1; j < frames.length && j < limit + 1; ++j) {
          sb.append(frames[j].toString() + "\n");
        }
      }
      return sb.toString();
    }
  
    /**
     * Helper log method to ease null-checks and adding spaces.
     * <p>
     * This sends all arguments to the log, separated by spaces. Any null argument is converted
     * to the "null" string. It uses a very visible tag and log level for debugging purposes.
     *
     * @param args the stuff to send to the log
     */
    public static void l(final Object... args) {
      if (!sDBG) return;
      final StringBuilder sb = new StringBuilder();
      for (final Object o : args) {
        sb.append(s(o));
        sb.append(" ");
      }
      Log.e(TAG, sb.toString());
    }
  
    /**
     * Helper log method to put stuff in red.
     * <p>
     * This does the same as #l but prints in red
     *
     * @param args the stuff to send to the log
     */
    public static void r(final Object... args) {
      if (!sDBG) return;
      final StringBuilder sb = new StringBuilder("\u001B[31m");
      for (final Object o : args) {
        sb.append(s(o));
        sb.append(" ");
      }
      sb.append("\u001B[0m");
      Log.e(TAG, sb.toString());
    }
  }
  