001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.hbtop.screen.top;
019
020import java.util.List;
021import java.util.function.Function;
022import org.apache.hadoop.hbase.hbtop.screen.AbstractScreenView;
023import org.apache.hadoop.hbase.hbtop.screen.Screen;
024import org.apache.hadoop.hbase.hbtop.screen.ScreenView;
025import org.apache.hadoop.hbase.hbtop.terminal.KeyPress;
026import org.apache.hadoop.hbase.hbtop.terminal.Terminal;
027import org.apache.yetus.audience.InterfaceAudience;
028
029/**
030 * The input mode in the top screen.
031 */
032@InterfaceAudience.Private
033public class InputModeScreenView extends AbstractScreenView {
034
035  private final int row;
036  private final InputModeScreenPresenter inputModeScreenPresenter;
037
038  public InputModeScreenView(Screen screen, Terminal terminal, int row, String message,
039    List<String> histories, Function<String, ScreenView> resultListener) {
040    super(screen, terminal);
041    this.row = row;
042    this.inputModeScreenPresenter =
043      new InputModeScreenPresenter(this, message, histories, resultListener);
044  }
045
046  @Override
047  public void init() {
048    inputModeScreenPresenter.init();
049  }
050
051  @Override
052  public ScreenView handleKeyPress(KeyPress keyPress) {
053
054    switch (keyPress.getType()) {
055      case Enter:
056        return inputModeScreenPresenter.returnToNextScreen();
057
058      case Character:
059        inputModeScreenPresenter.character(keyPress.getCharacter());
060        break;
061
062      case Backspace:
063        inputModeScreenPresenter.backspace();
064        break;
065
066      case Delete:
067        inputModeScreenPresenter.delete();
068        break;
069
070      case ArrowLeft:
071        inputModeScreenPresenter.arrowLeft();
072        break;
073
074      case ArrowRight:
075        inputModeScreenPresenter.arrowRight();
076        break;
077
078      case Home:
079        inputModeScreenPresenter.home();
080        break;
081
082      case End:
083        inputModeScreenPresenter.end();
084        break;
085
086      case ArrowUp:
087        inputModeScreenPresenter.arrowUp();
088        break;
089
090      case ArrowDown:
091        inputModeScreenPresenter.arrowDown();
092        break;
093
094      default:
095        break;
096    }
097    return this;
098  }
099
100  public void showInput(String message, String inputString, int cursorPosition) {
101    getTerminalPrinter(row).startBold().print(message).stopBold().print(" ").print(inputString)
102      .endOfLine();
103    setCursorPosition(message.length() + 1 + cursorPosition, row);
104    refreshTerminal();
105  }
106}