content: /*
   * Copyright (C) 2015-2023 Emanuel Moecklin
   *
   * 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.onegravity.rteditor.utils;
  
  import android.widget.EditText;
  
  import java.io.Serializable;
  
  /**
   * A Selection stands for selected text from a start to an end point. Don't mix
   * it up with android.text.Selection which has a completely different purpose.
   * <p>
   * It offers convenience methods to unify two Selections and the like.
   */
  public class Selection implements Serializable {
      private static final long serialVersionUID = 8415527424030047664L;
  
      // all indices start with 0
      private int mStart;        // index of the first character
      private int mEnd;        // index of the first character after the selection
  
      public Selection(int start, int end) {
          mStart = start;
          mEnd = end;
  
          if (mStart > mEnd) {
              int temp = mEnd;
              mEnd = mStart;
              mStart = temp;
          }
      }
  
      public Selection(EditText editor) {
          this(editor.getSelectionStart(), editor.getSelectionEnd());
      }
  
      public int start() {
          return mStart;
      }
  
      public int end() {
          return mEnd;
      }
  
      public boolean isEmpty() {
          return mStart == mEnd;
      }
  
      public Selection offset(int offsetLeft, int offsetRight) {
          mStart = Math.max(0, mStart - offsetLeft);
          mEnd = mEnd + offsetRight;
          return this;
      }
  
      @Override
      public String toString() {
          return "[" + mStart + ", " + mEnd + "]";
      }
  
  }
  