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