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daa4106c | 1 | /* |
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2 | * Jexer - Java Text User Interface |
3 | * | |
e16dda65 | 4 | * The MIT License (MIT) |
34a42e78 | 5 | * |
a69ed767 | 6 | * Copyright (C) 2019 Kevin Lamonte |
34a42e78 | 7 | * |
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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: | |
34a42e78 | 14 | * |
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15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
34a42e78 | 17 | * |
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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. | |
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25 | * |
26 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
27 | * @version 1 | |
28 | */ | |
29 | package jexer.tterminal; | |
30 | ||
31 | import jexer.bits.Cell; | |
32 | import jexer.bits.CellAttributes; | |
33 | ||
34 | /** | |
35 | * This represents a single line of the display buffer. | |
36 | */ | |
051e2913 | 37 | public class DisplayLine { |
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38 | |
39 | // ------------------------------------------------------------------------ | |
40 | // Constants -------------------------------------------------------------- | |
41 | // ------------------------------------------------------------------------ | |
42 | ||
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43 | /** |
44 | * Maximum line length. | |
45 | */ | |
46 | private static final int MAX_LINE_LENGTH = 256; | |
47 | ||
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48 | // ------------------------------------------------------------------------ |
49 | // Variables -------------------------------------------------------------- | |
50 | // ------------------------------------------------------------------------ | |
51 | ||
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52 | /** |
53 | * The characters/attributes of the line. | |
54 | */ | |
55 | private Cell [] chars; | |
56 | ||
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57 | /** |
58 | * Double-width line flag. | |
59 | */ | |
60 | private boolean doubleWidth = false; | |
61 | ||
62 | /** | |
63 | * Double height line flag. Valid values are: | |
64 | * | |
65 | * <p><pre> | |
66 | * 0 = single height | |
67 | * 1 = top half double height | |
68 | * 2 = bottom half double height | |
69 | * </pre> | |
70 | */ | |
71 | private int doubleHeight = 0; | |
72 | ||
73 | /** | |
74 | * DECSCNM - reverse video. We copy the flag to the line so that | |
75 | * reverse-mode scrollback lines still show inverted colors correctly. | |
76 | */ | |
77 | private boolean reverseColor = false; | |
78 | ||
79 | // ------------------------------------------------------------------------ | |
80 | // Constructors ----------------------------------------------------------- | |
81 | // ------------------------------------------------------------------------ | |
82 | ||
83 | /** | |
84 | * Public constructor sets everything to drawing attributes. | |
85 | * | |
86 | * @param attr current drawing attributes | |
87 | */ | |
88 | public DisplayLine(final CellAttributes attr) { | |
89 | chars = new Cell[MAX_LINE_LENGTH]; | |
90 | for (int i = 0; i < chars.length; i++) { | |
91 | chars[i] = new Cell(); | |
92 | chars[i].setTo(attr); | |
93 | } | |
94 | } | |
95 | ||
96 | // ------------------------------------------------------------------------ | |
97 | // DisplayLine ------------------------------------------------------------ | |
98 | // ------------------------------------------------------------------------ | |
99 | ||
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100 | /** |
101 | * Get the Cell at a specific column. | |
102 | * | |
103 | * @param idx the character index | |
104 | * @return the Cell | |
105 | */ | |
106 | public Cell charAt(final int idx) { | |
107 | return chars[idx]; | |
108 | } | |
109 | ||
110 | /** | |
111 | * Get the length of this line. | |
112 | * | |
113 | * @return line length | |
114 | */ | |
115 | public int length() { | |
116 | return chars.length; | |
117 | } | |
118 | ||
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119 | /** |
120 | * Get double width flag. | |
121 | * | |
122 | * @return double width | |
123 | */ | |
124 | public boolean isDoubleWidth() { | |
125 | return doubleWidth; | |
126 | } | |
127 | ||
128 | /** | |
129 | * Set double width flag. | |
130 | * | |
131 | * @param doubleWidth new value for double width flag | |
132 | */ | |
133 | public void setDoubleWidth(final boolean doubleWidth) { | |
134 | this.doubleWidth = doubleWidth; | |
135 | } | |
136 | ||
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137 | /** |
138 | * Get double height flag. | |
139 | * | |
140 | * @return double height | |
141 | */ | |
142 | public int getDoubleHeight() { | |
143 | return doubleHeight; | |
144 | } | |
145 | ||
146 | /** | |
147 | * Set double height flag. | |
148 | * | |
149 | * @param doubleHeight new value for double height flag | |
150 | */ | |
151 | public void setDoubleHeight(final int doubleHeight) { | |
152 | this.doubleHeight = doubleHeight; | |
153 | } | |
154 | ||
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155 | /** |
156 | * Get reverse video flag. | |
157 | * | |
158 | * @return reverse video | |
159 | */ | |
160 | public boolean isReverseColor() { | |
161 | return reverseColor; | |
162 | } | |
163 | ||
164 | /** | |
165 | * Set double-height flag. | |
166 | * | |
167 | * @param reverseColor new value for reverse video flag | |
168 | */ | |
169 | public void setReverseColor(final boolean reverseColor) { | |
170 | this.reverseColor = reverseColor; | |
171 | } | |
172 | ||
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173 | /** |
174 | * Insert a character at the specified position. | |
175 | * | |
176 | * @param idx the character index | |
177 | * @param newCell the new Cell | |
178 | */ | |
179 | public void insert(final int idx, final Cell newCell) { | |
180 | System.arraycopy(chars, idx, chars, idx + 1, chars.length - idx - 1); | |
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181 | chars[idx] = new Cell(); |
182 | chars[idx].setTo(newCell); | |
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183 | } |
184 | ||
185 | /** | |
186 | * Replace character at the specified position. | |
187 | * | |
188 | * @param idx the character index | |
189 | * @param newCell the new Cell | |
190 | */ | |
191 | public void replace(final int idx, final Cell newCell) { | |
bd8d51fa | 192 | chars[idx].setTo(newCell); |
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193 | } |
194 | ||
195 | /** | |
196 | * Set the Cell at the specified position to the blank (reset). | |
197 | * | |
198 | * @param idx the character index | |
199 | */ | |
200 | public void setBlank(final int idx) { | |
201 | chars[idx].reset(); | |
202 | } | |
203 | ||
204 | /** | |
205 | * Set the character (just the char, not the attributes) at the specified | |
206 | * position to ch. | |
207 | * | |
208 | * @param idx the character index | |
209 | * @param ch the new char | |
210 | */ | |
211 | public void setChar(final int idx, final char ch) { | |
212 | chars[idx].setChar(ch); | |
213 | } | |
214 | ||
215 | /** | |
216 | * Set the attributes (just the attributes, not the char) at the | |
217 | * specified position to attr. | |
218 | * | |
219 | * @param idx the character index | |
220 | * @param attr the new attributes | |
221 | */ | |
222 | public void setAttr(final int idx, final CellAttributes attr) { | |
223 | chars[idx].setAttr(attr); | |
224 | } | |
225 | ||
226 | /** | |
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227 | * Delete character at the specified position, filling in the new |
228 | * character on the right with newCell. | |
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229 | * |
230 | * @param idx the character index | |
231 | * @param newCell the new Cell | |
232 | */ | |
233 | public void delete(final int idx, final Cell newCell) { | |
234 | System.arraycopy(chars, idx + 1, chars, idx, chars.length - idx - 1); | |
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235 | chars[chars.length - 1] = new Cell(); |
236 | chars[chars.length - 1].setTo(newCell); | |
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237 | } |
238 | ||
239 | } |