/**
    * 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.hadoop.hbase.hbtop.terminal.impl;
  
  import java.util.Objects;
  
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.hbtop.terminal.AbstractTerminalPrinter;
  import org.apache.hadoop.hbase.hbtop.terminal.Attributes;
  import org.apache.hadoop.hbase.hbtop.terminal.Color;
  import org.apache.hadoop.hbase.hbtop.terminal.TerminalPrinter;
  
  /**
   * An implementation of the {@link TerminalPrinter} interface for normal display mode.
   */
  @InterfaceAudience.Private
  public class TerminalPrinterImpl extends AbstractTerminalPrinter {
    private final ScreenBuffer screenBuffer;
    private int row;
    private int column;
  
    private final Attributes attributes = new Attributes();
  
    TerminalPrinterImpl(ScreenBuffer screenBuffer, int startRow) {
      this.screenBuffer = Objects.requireNonNull(screenBuffer);
      this.row = startRow;
    }
  
    @Override
    public TerminalPrinter print(String value) {
      screenBuffer.putString(column, row, value, attributes);
      column += value.length();
      return this;
    }
  
    @Override
    public TerminalPrinter startHighlight() {
      attributes.setForegroundColor(Color.BLACK);
      attributes.setBackgroundColor(Color.WHITE);
      return this;
    }
  
    @Override
    public TerminalPrinter stopHighlight() {
      attributes.setForegroundColor(Color.WHITE);
      attributes.setBackgroundColor(Color.BLACK);
      return this;
    }
  
    @Override
    public TerminalPrinter startBold() {
      attributes.setBold(true);
      return this;
    }
  
    @Override
    public TerminalPrinter stopBold() {
      attributes.setBold(false);
      return this;
    }
  
    @Override
    public void endOfLine() {
      screenBuffer.endOfLine(column, row);
      row += 1;
      column = 0;
    }
  }