| 1 | /* |
| 2 | * Jexer - Java Text User Interface |
| 3 | * |
| 4 | * The MIT License (MIT) |
| 5 | * |
| 6 | * Copyright (C) 2016 Kevin Lamonte |
| 7 | * |
| 8 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 9 | * copy of this software and associated documentation files (the "Software"), |
| 10 | * to deal in the Software without restriction, including without limitation |
| 11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 12 | * and/or sell copies of the Software, and to permit persons to whom the |
| 13 | * Software is furnished to do so, subject to the following conditions: |
| 14 | * |
| 15 | * The above copyright notice and this permission notice shall be included in |
| 16 | * all copies or substantial portions of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 21 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 23 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 24 | * DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] |
| 27 | * @version 1 |
| 28 | */ |
| 29 | package jexer.backend; |
| 30 | |
| 31 | import java.io.InputStream; |
| 32 | import java.io.OutputStream; |
| 33 | import java.io.UnsupportedEncodingException; |
| 34 | import java.util.List; |
| 35 | |
| 36 | import jexer.event.TInputEvent; |
| 37 | import jexer.io.ECMA48Screen; |
| 38 | import jexer.io.ECMA48Terminal; |
| 39 | |
| 40 | /** |
| 41 | * This class uses an xterm/ANSI X3.64/ECMA-48 type terminal to provide a |
| 42 | * screen, keyboard, and mouse to TApplication. |
| 43 | */ |
| 44 | public final class ECMA48Backend extends Backend { |
| 45 | |
| 46 | /** |
| 47 | * Input events are processed by this Terminal. |
| 48 | */ |
| 49 | private ECMA48Terminal terminal; |
| 50 | |
| 51 | /** |
| 52 | * Public constructor. |
| 53 | * |
| 54 | * @param listener the object this backend needs to wake up when new |
| 55 | * input comes in |
| 56 | * @param input an InputStream connected to the remote user, or null for |
| 57 | * System.in. If System.in is used, then on non-Windows systems it will |
| 58 | * be put in raw mode; shutdown() will (blindly!) put System.in in cooked |
| 59 | * mode. input is always converted to a Reader with UTF-8 encoding. |
| 60 | * @param output an OutputStream connected to the remote user, or null |
| 61 | * for System.out. output is always converted to a Writer with UTF-8 |
| 62 | * encoding. |
| 63 | * @throws UnsupportedEncodingException if an exception is thrown when |
| 64 | * creating the InputStreamReader |
| 65 | */ |
| 66 | public ECMA48Backend(final Object listener, final InputStream input, |
| 67 | final OutputStream output) throws UnsupportedEncodingException { |
| 68 | |
| 69 | // Create a terminal and explicitly set stdin into raw mode |
| 70 | terminal = new ECMA48Terminal(listener, input, output); |
| 71 | |
| 72 | // Keep the terminal's sessionInfo so that TApplication can see it |
| 73 | sessionInfo = terminal.getSessionInfo(); |
| 74 | |
| 75 | // Create a screen |
| 76 | screen = new ECMA48Screen(terminal); |
| 77 | |
| 78 | // Clear the screen |
| 79 | terminal.getOutput().write(terminal.clearAll()); |
| 80 | terminal.flush(); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Sync the logical screen to the physical device. |
| 85 | */ |
| 86 | @Override |
| 87 | public void flushScreen() { |
| 88 | screen.flushPhysical(); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Get keyboard, mouse, and screen resize events. |
| 93 | * |
| 94 | * @param queue list to append new events to |
| 95 | */ |
| 96 | @Override |
| 97 | public void getEvents(final List<TInputEvent> queue) { |
| 98 | if (terminal.hasEvents()) { |
| 99 | terminal.getEvents(queue); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Close the I/O, restore the console, etc. |
| 105 | */ |
| 106 | @Override |
| 107 | public void shutdown() { |
| 108 | terminal.shutdown(); |
| 109 | } |
| 110 | |
| 111 | } |