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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; | |
30 | ||
31 | import jexer.bits.CellAttributes; | |
32 | import jexer.event.TKeypressEvent; | |
33 | import jexer.event.TMouseEvent; | |
34 | import jexer.teditor.Document; | |
35 | import jexer.teditor.Line; | |
36 | import jexer.teditor.Word; | |
37 | import static jexer.TKeypress.*; | |
38 | ||
39 | /** | |
40 | * TEditorWidget displays an editable text document. It is unaware of | |
41 | * scrolling behavior, but can respond to mouse and keyboard events. | |
42 | */ | |
43 | public final class TEditorWidget extends TWidget { | |
44 | ||
45 | /** | |
46 | * The document being edited. | |
47 | */ | |
48 | private Document document; | |
49 | ||
50 | /** | |
51 | * Public constructor. | |
52 | * | |
53 | * @param parent parent widget | |
54 | * @param text text on the screen | |
55 | * @param x column relative to parent | |
56 | * @param y row relative to parent | |
57 | * @param width width of text area | |
58 | * @param height height of text area | |
59 | */ | |
60 | public TEditorWidget(final TWidget parent, final String text, final int x, | |
61 | final int y, final int width, final int height) { | |
62 | ||
63 | // Set parent and window | |
64 | super(parent, x, y, width, height); | |
65 | ||
66 | setCursorVisible(true); | |
67 | document = new Document(text); | |
68 | } | |
69 | ||
70 | /** | |
71 | * Draw the text box. | |
72 | */ | |
73 | @Override | |
74 | public void draw() { | |
75 | // Setup my color | |
76 | CellAttributes color = getTheme().getColor("teditor"); | |
77 | ||
78 | int lineNumber = document.getLineNumber(); | |
79 | for (int i = 0; i < getHeight(); i++) { | |
80 | // Background line | |
81 | getScreen().hLineXY(0, i, getWidth(), ' ', color); | |
82 | ||
83 | // Now draw document's line | |
84 | if (lineNumber + i < document.getLineCount()) { | |
85 | Line line = document.getLine(lineNumber + i); | |
86 | int x = 0; | |
87 | for (Word word: line.getWords()) { | |
88 | getScreen().putStringXY(x, i, word.getText(), | |
89 | word.getColor()); | |
90 | x += word.getDisplayLength(); | |
91 | if (x > getWidth()) { | |
92 | break; | |
93 | } | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | } | |
99 | ||
100 | /** | |
101 | * Handle mouse press events. | |
102 | * | |
103 | * @param mouse mouse button press event | |
104 | */ | |
105 | @Override | |
106 | public void onMouseDown(final TMouseEvent mouse) { | |
107 | if (mouse.isMouseWheelUp()) { | |
108 | document.up(); | |
109 | return; | |
110 | } | |
111 | if (mouse.isMouseWheelDown()) { | |
112 | document.down(); | |
113 | return; | |
114 | } | |
115 | ||
116 | // TODO: click sets row and column | |
117 | ||
118 | // Pass to children | |
119 | super.onMouseDown(mouse); | |
120 | } | |
121 | ||
122 | /** | |
123 | * Handle keystrokes. | |
124 | * | |
125 | * @param keypress keystroke event | |
126 | */ | |
127 | @Override | |
128 | public void onKeypress(final TKeypressEvent keypress) { | |
129 | if (keypress.equals(kbLeft)) { | |
130 | document.left(); | |
131 | } else if (keypress.equals(kbRight)) { | |
132 | document.right(); | |
133 | } else if (keypress.equals(kbUp)) { | |
134 | document.up(); | |
135 | } else if (keypress.equals(kbDown)) { | |
136 | document.down(); | |
137 | } else if (keypress.equals(kbPgUp)) { | |
138 | document.up(getHeight() - 1); | |
139 | } else if (keypress.equals(kbPgDn)) { | |
140 | document.down(getHeight() - 1); | |
141 | } else if (keypress.equals(kbHome)) { | |
142 | document.home(); | |
143 | } else if (keypress.equals(kbEnd)) { | |
144 | document.end(); | |
145 | } else if (keypress.equals(kbCtrlHome)) { | |
146 | document.setLineNumber(0); | |
147 | document.home(); | |
148 | } else if (keypress.equals(kbCtrlEnd)) { | |
149 | document.setLineNumber(document.getLineCount() - 1); | |
150 | document.end(); | |
151 | } else if (keypress.equals(kbIns)) { | |
152 | document.setOverwrite(!document.getOverwrite()); | |
153 | } else if (keypress.equals(kbDel)) { | |
154 | document.del(); | |
155 | } else if (keypress.equals(kbBackspace)) { | |
156 | document.backspace(); | |
157 | } else if (!keypress.getKey().isFnKey() | |
158 | && !keypress.getKey().isAlt() | |
159 | && !keypress.getKey().isCtrl() | |
160 | ) { | |
161 | // Plain old keystroke, process it | |
162 | document.addChar(keypress.getKey().getChar()); | |
163 | } else { | |
164 | // Pass other keys (tab etc.) on to TWidget | |
165 | super.onKeypress(keypress); | |
166 | } | |
167 | } | |
168 | ||
169 | } |