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annotate src/org/tn5250j/framework/tn5250/ScreenField.java @ 416:07c1da90deab

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avoid null pointer
author Carl Byington <carl@five-ten-sg.com>
date Mon, 27 Oct 2014 13:58:42 -0700
parents 29076621bab0
children
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1 /**
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2 * Title: tn5250J
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3 * Copyright: Copyright (c) 2001
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4 * Company:
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5 * @author Kenneth J. Pouncey
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6 * @version 0.4
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7 *
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8 * Description:
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9 *
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10 * This program is free software; you can redistribute it and/or modify
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11 * it under the terms of the GNU General Public License as published by
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12 * the Free Software Foundation; either version 2, or (at your option)
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13 * any later version.
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14 *
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15 * This program is distributed in the hope that it will be useful,
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16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 * GNU General Public License for more details.
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19 *
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20 * You should have received a copy of the GNU General Public License
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21 * along with this software; see the file COPYING. If not, write to
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22 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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23 * Boston, MA 02111-1307 USA
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24 *
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25 */
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26 package org.tn5250j.framework.tn5250;
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27
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28 public class ScreenField {
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29
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30 protected ScreenField(Screen5250 s) {
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31 this.s = s;
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32 }
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34 protected ScreenField setField(int attr, int len, int ffw1, int ffw2,
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35 int fcw1, int fcw2) {
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36 return setField(attr,
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37 s.getCurrentRow() - 1,
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38 s.getCurrentCol() - 1,
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39 len,
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40 ffw1,
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41 ffw2,
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42 fcw1,
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43 fcw2);
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44 }
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46 protected ScreenField setField(int attr, int row, int col, int len, int ffw1, int ffw2,
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47 int fcw1, int fcw2) {
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48 // startRow = row;
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49 // startCol = col;
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50 cursorProg = 0;
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51 fieldId = 0;
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52 length = len;
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53 startPos = (row * s.getColumns()) + col;
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54 endPos = startPos + length - 1;
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55 this.attr = attr;
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56 setFFWs(ffw1, ffw2);
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57 setFCWs(fcw1, fcw2);
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58 next = null;
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59 prev = null;
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60 return this;
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61 }
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62
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63 public int getAttr() {
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64 return attr;
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65 }
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66
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67 public int getHighlightedAttr() {
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68 return (fcw2 & 0x0f) | 0x20;
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69 }
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71 public int getLength() {
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72 return length;
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73 }
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75 protected boolean setFFWs(int ffw1, int ffw2) {
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76 this.ffw1 = ffw1;
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77 this.ffw2 = ffw2;
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78 int adj = getAdjustment();
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80 if (adj > 0) {
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81 checkCanSend = true;
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83 switch (adj) {
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84 case 5:
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85 case 6:
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86 rightAdjd = false;
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87 break;
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89 case 7:
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90 mandatory = false;
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91 break;
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92 }
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93 }
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95 mdt = (ffw1 & 0x8) == 0x8;
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96 // if (mdt)
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97 // s.masterMDT = true;
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98 return mdt;
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99 }
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101
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102 public int getFFW1() {
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103 return ffw1;
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104 }
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105 public int getFFW2() {
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106 return ffw2;
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107 }
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108
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109 protected void setFCWs(int fcw1, int fcw2) {
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110 this.fcw1 = fcw1;
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111 this.fcw2 = fcw2;
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112
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113 // if ((fcw1 & 0x88) == 0x88) {
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114 if (fcw1 == 0x88) {
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115 cursorProg = fcw2;
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116 }
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117 }
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118
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119 public int getFCW1() {
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120 return fcw1;
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121 }
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123 public int getFCW2() {
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124 return fcw2;
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125 }
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126
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127 public int getFieldLength() {
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128 return length;
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129 }
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130
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131 public int getCursorProgression() {
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132 return cursorProg;
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133 }
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135 public int getFieldId() {
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136 return fieldId;
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137 }
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139 protected void setFieldId(int fi) {
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140 fieldId = fi;
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141 }
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142
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143 public int getCursorRow() {
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144 return cursorPos / s.getColumns();
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145 }
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146
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147 public int getCursorCol() {
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148 return cursorPos % s.getColumns();
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149 }
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151 protected void changePos(int i) {
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152 cursorPos += i;
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153 }
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154
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155 protected String getText() {
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156 StringBuffer text = new StringBuffer();
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157 getKeyPos(endPos);
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158 int x = length;
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159 text.setLength(x);
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160
112
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161 while (x-- > 0) {
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162 // here we manipulate the unicode characters a little for attributes
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163 // that are imbedded in input fields. We will offset them by unicode
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164 // \uff00. All routines that process these fields will have to
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165 // return them to their proper offsets.
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166 // example:
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167 // if we read an attribute byte of 32 for normal display the unicode
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168 // character for this is \u0020 and the unicode character for
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169 // a space is also \u0020 thus the offset.
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170 if (s.planes.isAttributePlace(cursorPos)) {
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171 text.setCharAt(x, (char)('\uff00' + s.planes.getCharAttr(cursorPos)));
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172 }
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173 else {
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174 text.setCharAt(x, s.planes.getChar(cursorPos));
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175 }
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176
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177 changePos(-1);
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178 }
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179
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180 // Since only the mdt of the first continued field is set we will get
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181 // the text of the next continued field if we are dealing with continued
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182 // fields. See routine setMDT for the whys of this. This is only
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183 // executed if this is the first field of a continued field.
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184 if (isContinued() && isContinuedFirst()) {
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185 ScreenField sf = this;
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186
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187 do {
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188 sf = sf.next;
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189 text.append(sf.getText());
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190 }
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191 while (!sf.isContinuedLast());
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192
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193 sf = null;
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194 }
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195
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196 return text.toString();
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197 }
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198
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199 public String getString() {
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200 StringBuffer text = new StringBuffer();
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201 getKeyPos(endPos);
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202 int x = length;
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203 text.setLength(x);
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204
112
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205 while (x-- > 0) {
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206 // here we manipulate the unicode characters a little for attributes
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207 // that are imbedded in input fields. We will offset them by unicode
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208 // \uff00. All routines that process these fields will have to
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209 // return them to their proper offsets.
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210 // example:
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211 // if we read an attribute byte of 32 for normal display the unicode
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212 // character for this is \u0020 and the unicode character for
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213 // a space is also \u0020 thus the offset.
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214 if (s.planes.isAttributePlace(cursorPos)) {
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215 text.setCharAt(x, (char)('\uff00' + s.planes.getCharAttr(cursorPos)));
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216 }
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217 else {
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218 if (s.planes.getChar(cursorPos) < ' ')
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219 text.setCharAt(x, ' ');
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220 else
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221 text.setCharAt(x, s.planes.getChar(cursorPos));
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222 }
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223
112
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224 changePos(-1);
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225 }
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226
112
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227 // Since only the mdt of the first continued field is set we will get
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228 // the text of the next continued field if we are dealing with continued
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229 // fields. See routine setMDT for the whys of this. This is only
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230 // executed if this is the first field of a continued field.
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231 if (isContinued() && isContinuedFirst()) {
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232 ScreenField sf = this;
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233
112
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234 do {
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235 sf = sf.next;
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236 text.append(sf.getString());
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237 }
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238 while (!sf.isContinuedLast());
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239
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240 sf = null;
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241 }
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242
112
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243 return text.toString();
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244 }
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245
112
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diff changeset
246 public void setFieldChar(char c) {
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247 int x = length;
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248 cursorPos = startPos;
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249
112
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250 while (x-- > 0) {
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251 s.planes.setChar(cursorPos, c);
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252 changePos(1);
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253 }
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254 }
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255
112
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diff changeset
256 public void setFieldChar(int lastPos, char c) {
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257 int x = endPos - lastPos + 1;
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258 cursorPos = lastPos;
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259
112
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diff changeset
260 while (x-- > 0) {
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261 s.planes.setChar(cursorPos, c);
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262 s.setDirty(cursorPos);
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diff changeset
263 changePos(1);
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264 }
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diff changeset
265 }
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266
112
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diff changeset
267 protected void setRightAdjusted() {
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268 rightAdjd = true;
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diff changeset
269 }
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270
348
29076621bab0 merge tn5250j r1227; fix spelling
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diff changeset
271 protected void setMandatoryEntered() {
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272 mandatory = true;
112
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273 }
69
294435151b0c use 5250 encryption config entry
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274
112
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diff changeset
275 protected void resetMDT() {
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diff changeset
276 mdt = false;
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277 }
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278
112
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diff changeset
279 protected void setMDT() {
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diff changeset
280 // get the first field of a continued edit field if it is continued
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diff changeset
281 if (isContinued() && !isContinuedFirst()) {
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282 ScreenField sf = prev;
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283
112
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diff changeset
284 while (sf.isContinued() && !sf.isContinuedFirst()) {
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diff changeset
285 sf = sf.prev;
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286 }
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287
112
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diff changeset
288 sf.setMDT();
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289 sf = null;
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290 }
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diff changeset
291 else {
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292 mdt = true;
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293 }
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294 }
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295
112
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diff changeset
296 public boolean isBypassField() {
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297 return (ffw1 & 0x20) == 0x20;
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298 }
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299
112
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diff changeset
300 public int getAdjustment() {
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301 return (ffw2 & 0x7);
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302 }
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303
112
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304 // is field exit required
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305 public boolean isFER() {
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diff changeset
306 return (ffw2 & 0x40) == 0x40;
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307 }
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308
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diff changeset
309 // is field mandatory enter
112
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diff changeset
310 public boolean isMandatoryEnter() {
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diff changeset
311 return (ffw2 & 0x8) == 0x8;
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312 }
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313
112
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diff changeset
314 public boolean isToUpper() {
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diff changeset
315 return (ffw2 & 0x20) == 0x20;
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diff changeset
316 }
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317
112
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diff changeset
318 // bits 5 - 7
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diff changeset
319 public int getFieldShift() {
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diff changeset
320 return (ffw1 & 0x7);
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diff changeset
321 }
3
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322
112
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diff changeset
323 public boolean isHiglightedEntry() {
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diff changeset
324 return (fcw1 == 0x89);
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diff changeset
325 }
3
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326
112
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diff changeset
327 public boolean isAutoEnter() {
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diff changeset
328 return (ffw2 & 0x80) == 0x80;
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diff changeset
329 }
3
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330
112
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diff changeset
331 public boolean isSignedNumeric() {
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diff changeset
332 return (getFieldShift() == 7);
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diff changeset
333 }
3
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334
112
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diff changeset
335 public boolean isRightToLeft() {
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diff changeset
336 return (getFieldShift() == 0x04);
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diff changeset
337 }
3
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338
112
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diff changeset
339 public boolean isNumeric() {
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diff changeset
340 return (getFieldShift() == 3);
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diff changeset
341 }
3
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342
112
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diff changeset
343 public boolean isDupEnabled() {
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diff changeset
344 return (ffw1 & 0x10) == 0x10;
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345 }
3
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346
112
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diff changeset
347 public boolean isContinued() {
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diff changeset
348 return (fcw1 & 0x86) == 0x86 && (fcw2 >= 1 && fcw2 <= 3) ;
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349 }
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350
112
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diff changeset
351 public boolean isContinuedFirst() {
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352 return (fcw1 & 0x86) == 0x86 && (fcw2 == 1);
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353 }
3
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354
112
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diff changeset
355 public boolean isContinuedMiddle() {
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diff changeset
356 return (fcw1 & 0x86) == 0x86 && (fcw2 == 3);
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357 }
3
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358
112
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diff changeset
359 public boolean isContinuedLast() {
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diff changeset
360 return (fcw1 & 0x86) == 0x86 && (fcw2 == 2);
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361 }
3
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362
112
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diff changeset
363 protected boolean isCanSend() {
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diff changeset
364 int adj = getAdjustment();
3
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365
112
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diff changeset
366 // here we need to check the Field Exit Required value first before checking
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diff changeset
367 // the adjustments. If the last character has been entered and we are
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diff changeset
368 // now setting past the last position then we are allowed to process the
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diff changeset
369 // the field without continuing.
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diff changeset
370 if (isFER() && cursorPos > endPos) {
3
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371 return true;
112
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diff changeset
372 }
3
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373
112
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diff changeset
374 // signed numeric fields need to be checked as well.
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diff changeset
375 if (isSignedNumeric() && cursorPos < endPos - 1) {
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diff changeset
376 return false;
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diff changeset
377 }
3
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378
112
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diff changeset
379 if (adj > 0) {
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diff changeset
380 switch (adj) {
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diff changeset
381 case 5:
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diff changeset
382 case 6:
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diff changeset
383 return rightAdjd;
3
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384
112
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diff changeset
385 case 7:
348
29076621bab0 merge tn5250j r1227; fix spelling
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diff changeset
386 return mandatory;
3
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387
112
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diff changeset
388 default:
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diff changeset
389 return true;
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diff changeset
390 }
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diff changeset
391 }
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parents: 69
diff changeset
392
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diff changeset
393 return true;
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parents: 69
diff changeset
394 }
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parents: 69
diff changeset
395
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diff changeset
396 public boolean isSelectionField() {
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parents: 69
diff changeset
397 return isSelectionField;
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parents: 69
diff changeset
398 }
3
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parents:
diff changeset
399
112
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diff changeset
400 public void setSelectionFieldInfo(int type, int index, int position) {
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diff changeset
401 selectionFieldType = type;
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diff changeset
402 selectionIndex = index;
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diff changeset
403 selectionPos = position;
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parents: 69
diff changeset
404 isSelectionField = true;
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parents: 69
diff changeset
405 }
3
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parents:
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406
112
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diff changeset
407 protected int getKeyPos(int row1, int col1) {
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parents: 69
diff changeset
408 int x = ((row1 * s.getColumns()) + col1);
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
409 int y = x - startPos();
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
410 cursorPos = x;
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parents: 69
diff changeset
411 return y;
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
412 }
3
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parents:
diff changeset
413
112
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diff changeset
414 protected int getKeyPos(int pos) {
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parents: 69
diff changeset
415 int y = pos - startPos();
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
416 cursorPos = pos;
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
417 return y;
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
418 }
3
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parents:
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419
112
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diff changeset
420 public int getCurrentPos() {
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parents: 69
diff changeset
421 return cursorPos;
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parents: 69
diff changeset
422 }
3
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parents:
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423
112
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parents: 69
diff changeset
424 public boolean withinField(int pos) {
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parents: 69
diff changeset
425 if (pos >= startPos && pos <= endPos)
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parents: 69
diff changeset
426 return true;
3
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parents:
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427
112
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parents: 69
diff changeset
428 return false;
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
429 }
3
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parents:
diff changeset
430
112
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parents: 69
diff changeset
431 public int startPos() {
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parents: 69
diff changeset
432 return startPos;
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
433 }
3
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parents:
diff changeset
434
112
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
435 /**
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
436 * Get the starting row of the field. Offset is 0 so row 6 returned
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
437 * is row 7 mapped to screen
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
438 * @return int starting row of the field offset 0
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parents: 69
diff changeset
439 */
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parents: 69
diff changeset
440 public int startRow() {
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parents: 69
diff changeset
441 return startPos / s.getColumns();
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
442 }
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
443
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
444 /**
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
445 * Get the starting column of the field. Offset is 0 so column 6 returned
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
446 * is column 7 mapped to screen
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
447 * @return int starting column of the field offset 0
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
448 */
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parents: 69
diff changeset
449 public int startCol() {
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parents: 69
diff changeset
450 return startPos % s.getColumns();
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
451 }
3
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parents:
diff changeset
452
112
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diff changeset
453 public int endPos() {
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parents: 69
diff changeset
454 return endPos;
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
455 }
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
456
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
457 /**
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
458 * Sets the field's text plane to the specified string. If the string is
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
459 * shorter than the length of the field, the rest of the field is cleared.
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
460 * If the string is longer than the field, the text is truncated. A subsequent
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
461 * call to getText on this field will not show the changed text. To see the
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
462 * changed text, do a refresh on the iOhioFields collection and retrieve the
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
463 * refreshed field object.
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
464 *
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
465 * @param text - The text to be placed in the field's text plane.
77ac18bc1b2f cleanup java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 69
diff changeset
466 */
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
467 public void setString(String text) {
348
29076621bab0 merge tn5250j r1227; fix spelling
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parents: 112
diff changeset
468 cursorPos = startPos;
3
e8d2a24e85c6 adding tn5250 files
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parents:
diff changeset
469
348
29076621bab0 merge tn5250j r1227; fix spelling
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parents: 112
diff changeset
470 if (isRightToLeft()) {
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Carl Byington <carl@five-ten-sg.com>
parents: 112
diff changeset
471 text = new StringBuilder(text).reverse().toString();
29076621bab0 merge tn5250j r1227; fix spelling
Carl Byington <carl@five-ten-sg.com>
parents: 112
diff changeset
472 }
112
77ac18bc1b2f cleanup java formatting
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parents: 69
diff changeset
473
348
29076621bab0 merge tn5250j r1227; fix spelling
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parents: 112
diff changeset
474 final ScreenPlanes planes = s.getPlanes();
29076621bab0 merge tn5250j r1227; fix spelling
Carl Byington <carl@five-ten-sg.com>
parents: 112
diff changeset
475 for (int x = 0,len = text.length(); x < length; x++) {
29076621bab0 merge tn5250j r1227; fix spelling
Carl Byington <carl@five-ten-sg.com>
parents: 112
diff changeset
476 char tc = (x < len) ? text.charAt(x) : ' ';
29076621bab0 merge tn5250j r1227; fix spelling
Carl Byington <carl@five-ten-sg.com>
parents: 112
diff changeset
477 planes.setChar(cursorPos, tc);
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478 changePos(1);
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479 }
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480 setMDT();
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481 s.getScreenFields().setMasterMDT();
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482 }
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483
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484 @Override
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485 public String toString() {
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486 int fcw = (fcw1 & 0xff) << 8 | fcw2 & 0xff;
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487 return "startRow = " + startRow() + " startCol = " + startCol() +
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488 " length = " + length + " ffw1 = (0x" + Integer.toHexString(ffw1) +
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489 ") ffw2 = (0x" + Integer.toHexString(ffw2) +
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490 ") fcw1 = (0x" + Integer.toHexString(fcw1) +
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491 ") fcw2 = (0x" + Integer.toHexString(fcw2) +
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492 ") fcw = (" + Integer.toBinaryString(fcw) +
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493 ") fcw hex = (0x" + Integer.toHexString(fcw) +
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494 ") is bypass field = " + isBypassField() +
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495 ") is autoenter = " + isAutoEnter() +
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496 ") is mandatoryenter = " + isMandatoryEnter() +
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497 ") is field exit required = " + isFER() +
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498 ") is Numeric = " + isNumeric() +
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499 ") is Signed Numeric = " + isSignedNumeric() +
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500 ") is cursor progression = " + (fcw1 == 0x88) +
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501 ") next progression field = " + fcw2 +
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502 ") field id " + fieldId +
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503 " continued edit field = " + isContinued() +
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504 " first continued edit field = " + isContinuedFirst() +
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505 " middle continued edit field = " + isContinuedMiddle() +
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506 " last continued edit field = " + isContinuedLast() +
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507 " mdt = " + mdt;
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508 }
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509
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510 public int getStartPos() {
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511 return startPos;
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512 }
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513
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514 int startPos = 0;
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515 int endPos = 0;
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516 boolean mdt = false;
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517 protected boolean checkCanSend;
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518 protected boolean rightAdjd;
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519 protected boolean mandatory;
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520 boolean canSend = true;
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521 int attr = 0;
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522 int length = 0;
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523 int ffw1 = 0;
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524 int ffw2 = 0;
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525 int fcw1 = 0;
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526 int fcw2 = 0;
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527 int cursorPos = 0;
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528 Screen5250 s;
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529 int cursorProg = 0;
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530 int fieldId = 0;
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531 ScreenField next = null;
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532 ScreenField prev = null;
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533 boolean isSelectionField;
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534 int selectionFieldType;
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535 int selectionIndex;
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536 int selectionPos;
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537 }