Mercurial > 510Connectbot

comparison src/com/five_ten_sg/connectbot/bean/SelectionArea.java @ 0:0ce5cc452d02

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initial version
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 10:41:19 -0700
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1 /*
2 * ConnectBot: simple, powerful, open-source SSH client for Android
3 * Copyright 2007 Kenny Root, Jeffrey Sharkey
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package com.five_ten_sg.connectbot.bean;
19
20 import de.mud.terminal.VDUBuffer;
21
22 /**
23 * @author Kenny Root
24 * Keep track of a selection area for the terminal copying mechanism.
25 * If the orientation is flipped one way, swap the bottom and top or
26 * left and right to keep it in the correct orientation.
27 */
28 public class SelectionArea {
29 private int top;
30 private int bottom;
31 private int left;
32 private int right;
33 private int maxColumns;
34 private int maxRows;
35 private boolean selectingOrigin;
36
37 public SelectionArea() {
38 reset();
39 }
40
41 public final void reset() {
42 top = left = bottom = right = 0;
43 selectingOrigin = true;
44 }
45
46 /**
47 * @param columns
48 * @param rows
49 */
50 public void setBounds(int columns, int rows) {
51 maxColumns = columns - 1;
52 maxRows = rows - 1;
53 }
54
55 private int checkBounds(int value, int max) {
56 if (value < 0)
57 return 0;
58 else if (value > max)
59 return max;
60 else
61 return value;
62 }
63
64 public boolean isSelectingOrigin() {
65 return selectingOrigin;
66 }
67
68 public void finishSelectingOrigin() {
69 selectingOrigin = false;
70 }
71
72 public void decrementRow() {
73 if (selectingOrigin)
74 setTop(top - 1);
75 else
76 setBottom(bottom - 1);
77 }
78
79 public void incrementRow() {
80 if (selectingOrigin)
81 setTop(top + 1);
82 else
83 setBottom(bottom + 1);
84 }
85
86 public void setRow(int row) {
87 if (selectingOrigin)
88 setTop(row);
89 else
90 setBottom(row);
91 }
92
93 private void setTop(int top) {
94 this.top = bottom = checkBounds(top, maxRows);
95 }
96
97 public int getTop() {
98 return Math.min(top, bottom);
99 }
100
101 private void setBottom(int bottom) {
102 this.bottom = checkBounds(bottom, maxRows);
103 }
104
105 public int getBottom() {
106 return Math.max(top, bottom);
107 }
108
109 public void decrementColumn() {
110 if (selectingOrigin)
111 setLeft(left - 1);
112 else
113 setRight(right - 1);
114 }
115
116 public void incrementColumn() {
117 if (selectingOrigin)
118 setLeft(left + 1);
119 else
120 setRight(right + 1);
121 }
122
123 public void setColumn(int column) {
124 if (selectingOrigin)
125 setLeft(column);
126 else
127 setRight(column);
128 }
129
130 private void setLeft(int left) {
131 this.left = right = checkBounds(left, maxColumns);
132 }
133
134 public int getLeft() {
135 return Math.min(left, right);
136 }
137
138 private void setRight(int right) {
139 this.right = checkBounds(right, maxColumns);
140 }
141
142 public int getRight() {
143 return Math.max(left, right);
144 }
145
146 public String copyFrom(VDUBuffer vb) {
147 int size = (getRight() - getLeft() + 1) * (getBottom() - getTop() + 1);
148 StringBuffer buffer = new StringBuffer(size);
149
150 for (int y = getTop(); y <= getBottom(); y++) {
151 int lastNonSpace = buffer.length();
152
153 for (int x = getLeft(); x <= getRight(); x++) {
154 // only copy printable chars
155 char c = vb.getChar(x, y);
156
157 if (!Character.isDefined(c) ||
158 (Character.isISOControl(c) && c != '\t'))
159 c = ' ';
160
161 if (c != ' ')
162 lastNonSpace = buffer.length();
163
164 buffer.append(c);
165 }
166
167 // Don't leave a bunch of spaces in our copy buffer.
168 if (buffer.length() > lastNonSpace)
169 buffer.delete(lastNonSpace + 1, buffer.length());
170
171 if (y != bottom)
172 buffer.append("\n");
173 }
174
175 return buffer.toString();
176 }
177
178 @Override
179 public String toString() {
180 StringBuilder buffer = new StringBuilder();
181 buffer.append("SelectionArea[top=");
182 buffer.append(top);
183 buffer.append(", bottom=");
184 buffer.append(bottom);
185 buffer.append(", left=");
186 buffer.append(left);
187 buffer.append(", right=");
188 buffer.append(right);
189 buffer.append(", maxColumns=");
190 buffer.append(maxColumns);
191 buffer.append(", maxRows=");
192 buffer.append(maxRows);
193 buffer.append(", isSelectingOrigin=");
194 buffer.append(isSelectingOrigin());
195 buffer.append("]");
196 return buffer.toString();
197 }
198 }