Fix bounds check
[nikiroo-utils.git] / src / jexer / backend / GenericBackend.java
1 /*
2 * Jexer - Java Text User Interface
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (C) 2017 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.util.List;
32
33 import jexer.event.TInputEvent;
34
35 /**
36 * This abstract class provides a screen, keyboard, and mouse to
37 * TApplication. It also exposes session information as gleaned from lower
38 * levels of the communication stack.
39 */
40 public abstract class GenericBackend implements Backend {
41
42 /**
43 * The session information.
44 */
45 protected SessionInfo sessionInfo;
46
47 /**
48 * Getter for sessionInfo.
49 *
50 * @return the SessionInfo
51 */
52 public final SessionInfo getSessionInfo() {
53 return sessionInfo;
54 }
55
56 /**
57 * The screen to draw on.
58 */
59 protected Screen screen;
60
61 /**
62 * Getter for screen.
63 *
64 * @return the Screen
65 */
66 public final Screen getScreen() {
67 return screen;
68 }
69
70 /**
71 * Sync the logical screen to the physical device.
72 */
73 public void flushScreen() {
74 screen.flushPhysical();
75 }
76
77 /**
78 * Input events are processed by this Terminal.
79 */
80 protected TerminalReader terminal;
81
82 /**
83 * Get keyboard, mouse, and screen resize events.
84 *
85 * @param queue list to append new events to
86 */
87 public void getEvents(final List<TInputEvent> queue) {
88 if (terminal.hasEvents()) {
89 terminal.getEvents(queue);
90 }
91 }
92
93 /**
94 * Close the I/O, restore the console, etc.
95 */
96 public void shutdown() {
97 terminal.closeTerminal();
98 }
99
100 /**
101 * Set the window title.
102 *
103 * @param title the new title
104 */
105 public void setTitle(final String title) {
106 screen.setTitle(title);
107 }
108
109 /**
110 * Set listener to a different Object.
111 *
112 * @param listener the new listening object that run() wakes up on new
113 * input
114 */
115 public void setListener(final Object listener) {
116 terminal.setListener(listener);
117 }
118
119 }