1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.usability; |
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16 | |
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17 | import java.text.DecimalFormat; |
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18 | import java.util.ArrayList; |
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19 | import java.util.Collection; |
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20 | import java.util.HashMap; |
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21 | import java.util.List; |
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22 | import java.util.Map; |
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23 | |
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24 | import de.ugoe.cs.autoquest.eventcore.IEventTarget; |
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25 | import de.ugoe.cs.autoquest.eventcore.IEventType; |
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26 | import de.ugoe.cs.autoquest.eventcore.gui.TextInput; |
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27 | import de.ugoe.cs.autoquest.eventcore.guimodel.ITextArea; |
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28 | import de.ugoe.cs.autoquest.eventcore.guimodel.ITextField; |
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29 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTask; |
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30 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTaskInstance; |
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31 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IMarkingTemporalRelationship; |
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32 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IStructuringTemporalRelationship; |
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33 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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34 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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35 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel; |
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36 | |
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37 | /** |
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38 | * TODO comment |
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39 | * |
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40 | * @version $Revision: $ $Date: 16.07.2012$ |
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41 | * @author 2012, last modified by $Author: pharms$ |
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42 | */ |
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43 | public class TextInputStatisticsRule implements de.ugoe.cs.autoquest.usability.UsabilityEvaluationRule { |
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44 | |
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45 | /* |
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46 | * (non-Javadoc) |
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47 | * |
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48 | * @see de.ugoe.cs.usability.UsabilityEvaluationRule#evaluate(TaskTree) |
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49 | */ |
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50 | @Override |
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51 | public UsabilityEvaluationResult evaluate(ITaskModel taskModel) { |
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52 | TextInputStatistics statistics = new TextInputStatistics(); |
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53 | calculateStatistics(taskModel.getTasks(), statistics); |
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54 | |
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55 | UsabilityEvaluationResult results = new UsabilityEvaluationResult(); |
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56 | analyzeStatistics(statistics, results); |
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57 | |
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58 | return results; |
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59 | } |
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60 | |
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61 | /** |
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62 | * |
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63 | */ |
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64 | private void analyzeStatistics(TextInputStatistics statistics, |
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65 | UsabilityEvaluationResult results) |
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66 | { |
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67 | checkTextInputRatio(statistics, results); |
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68 | checkTextFieldEntryRepetitions(statistics, results); |
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69 | checkTextFieldNoLetterOrDigitInputs(statistics, results); |
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70 | } |
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71 | |
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72 | /** |
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73 | * |
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74 | */ |
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75 | private void checkTextInputRatio(TextInputStatistics statistics, |
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76 | UsabilityEvaluationResult results) |
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77 | { |
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78 | float allTextFieldInputs = |
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79 | statistics.getNoOfTextFieldInputs() + statistics.getNoOfTextAreaInputs(); |
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80 | |
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81 | float ratio = allTextFieldInputs / (float) statistics.getNoOfAllEvents(); |
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82 | |
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83 | UsabilityDefectSeverity severity = null; |
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84 | if (ratio > 0.9) { |
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85 | severity = UsabilityDefectSeverity.HIGH; |
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86 | } |
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87 | else if (ratio > 0.7) { |
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88 | severity = UsabilityDefectSeverity.MEDIUM; |
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89 | } |
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90 | else if (ratio > 0.5) { |
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91 | severity = UsabilityDefectSeverity.LOW; |
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92 | } |
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93 | else if (ratio > 0.3) { |
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94 | severity = UsabilityDefectSeverity.INFO; |
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95 | } |
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96 | |
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97 | if (severity != null) { |
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98 | Map<String, String> parameters = new HashMap<String, String>(); |
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99 | parameters.put("textInputRatio", DecimalFormat.getInstance().format(ratio * 100) + "%"); |
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100 | |
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101 | results.addDefect |
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102 | (new UsabilityDefect(severity, UsabilityDefectDescription.TEXT_FIELD_INPUT_RATIO, |
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103 | parameters)); |
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104 | } |
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105 | } |
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106 | |
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107 | /** |
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108 | * |
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109 | */ |
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110 | private void checkTextFieldEntryRepetitions(TextInputStatistics statistics, |
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111 | UsabilityEvaluationResult results) |
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112 | { |
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113 | Map<String, Integer> words = new HashMap<String, Integer>(); |
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114 | int numberOfRepeatedWords = 0; |
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115 | int maxRepetitions = 0; |
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116 | |
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117 | for (int i = 0; i < statistics.getNoOfTextFieldInputs(); i++) { |
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118 | String[] fragments = statistics.getTextFieldInputFragments(i); |
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119 | for (String fragment : fragments) { |
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120 | if (!"".equals(fragment.trim())) { |
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121 | Integer count = words.get(fragment); |
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122 | if (count == null) { |
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123 | words.put(fragment, 1); |
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124 | } |
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125 | else { |
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126 | count++; |
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127 | words.put(fragment, count); |
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128 | maxRepetitions = Math.max(count, maxRepetitions); |
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129 | |
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130 | if (count == 2) { |
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131 | // do not calculate repeated words several times |
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132 | numberOfRepeatedWords++; |
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133 | } |
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134 | } |
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135 | } |
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136 | } |
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137 | } |
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138 | |
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139 | UsabilityDefectSeverity severity = null; |
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140 | if ((numberOfRepeatedWords > 10) || (maxRepetitions > 10)) { |
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141 | severity = UsabilityDefectSeverity.HIGH; |
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142 | } |
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143 | else if ((numberOfRepeatedWords > 4) || (maxRepetitions > 4)) { |
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144 | severity = UsabilityDefectSeverity.MEDIUM; |
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145 | } |
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146 | else if ((numberOfRepeatedWords > 2) || (maxRepetitions > 2)) { |
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147 | severity = UsabilityDefectSeverity.LOW; |
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148 | } |
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149 | else if ((numberOfRepeatedWords > 1) || (maxRepetitions > 1)) { |
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150 | severity = UsabilityDefectSeverity.INFO; |
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151 | } |
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152 | |
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153 | if (severity != null) { |
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154 | Map<String, String> parameters = new HashMap<String, String>(); |
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155 | parameters.put("textRepetitionRatio", numberOfRepeatedWords + |
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156 | " repeated tokens, up to " + maxRepetitions + " repetitions per token"); |
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157 | |
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158 | results.addDefect |
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159 | (new UsabilityDefect(severity, |
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160 | UsabilityDefectDescription.TEXT_FIELD_INPUT_REPETITIONS, |
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161 | parameters)); |
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162 | } |
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163 | } |
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164 | |
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165 | /** |
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166 | * |
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167 | */ |
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168 | private void checkTextFieldNoLetterOrDigitInputs(TextInputStatistics statistics, |
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169 | UsabilityEvaluationResult results) |
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170 | { |
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171 | int allCharactersCount = 0; |
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172 | int noLetterOrDigitCount = 0; |
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173 | |
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174 | for (int i = 0; i < statistics.getNoOfTextFieldInputs(); i++) { |
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175 | String[] fragments = statistics.getTextFieldInputFragments(i); |
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176 | for (String fragment : fragments) { |
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177 | String effectiveFragment = fragment.trim(); |
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178 | for (int j = 0; j < effectiveFragment.length(); j++) { |
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179 | if (!Character.isWhitespace(effectiveFragment.charAt(j))) { |
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180 | if (!Character.isLetterOrDigit(effectiveFragment.charAt(j))) { |
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181 | noLetterOrDigitCount++; |
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182 | } |
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183 | allCharactersCount++; |
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184 | } |
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185 | } |
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186 | } |
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187 | } |
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188 | |
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189 | float ratio = (float) noLetterOrDigitCount / (float) allCharactersCount; |
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190 | |
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191 | UsabilityDefectSeverity severity = null; |
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192 | if (ratio > 0.1) // every 10th sign |
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193 | { |
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194 | severity = UsabilityDefectSeverity.HIGH; |
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195 | } |
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196 | else if (ratio > 0.05) // every 20th sign |
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197 | { |
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198 | severity = UsabilityDefectSeverity.MEDIUM; |
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199 | } |
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200 | else if (ratio > 0.02) // every 50th sign |
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201 | { |
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202 | severity = UsabilityDefectSeverity.LOW; |
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203 | } |
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204 | else if (ratio > 0.01) // every 100th sign |
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205 | { |
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206 | severity = UsabilityDefectSeverity.INFO; |
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207 | } |
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208 | |
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209 | if (severity != null) { |
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210 | Map<String, String> parameters = new HashMap<String, String>(); |
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211 | parameters.put("noLetterOrDigitRatio", allCharactersCount + " entered characters of " + |
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212 | "which " + noLetterOrDigitCount + " were no letter or digit"); |
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213 | |
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214 | results.addDefect |
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215 | (new UsabilityDefect(severity, |
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216 | UsabilityDefectDescription.TEXT_FIELD_NO_LETTER_OR_DIGIT_RATIO, |
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217 | parameters)); |
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218 | } |
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219 | } |
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220 | |
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221 | /** |
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222 | * |
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223 | */ |
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224 | private void calculateStatistics(Collection<ITask> tasks, TextInputStatistics statistics) { |
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225 | for (ITask task : tasks) { |
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226 | calculateStatistics(task, statistics); |
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227 | } |
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228 | } |
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229 | |
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230 | /** |
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231 | * |
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232 | */ |
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233 | private void calculateStatistics(ITask task, TextInputStatistics statistics) { |
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234 | |
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235 | if (isTextInput(task)) { |
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236 | calculateStatistics((IEventTask) task, statistics); |
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237 | } |
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238 | else { |
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239 | if (task instanceof IStructuringTemporalRelationship) { |
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240 | for (ITask child : ((IStructuringTemporalRelationship) task).getChildren()) { |
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241 | calculateStatistics(child, statistics); |
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242 | } |
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243 | } |
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244 | else if (task instanceof IMarkingTemporalRelationship) { |
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245 | calculateStatistics |
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246 | (((IMarkingTemporalRelationship) task).getMarkedTask(), statistics); |
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247 | } |
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248 | else { |
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249 | statistics.incrementNoOfOtherEventTasks(); |
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250 | } |
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251 | } |
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252 | } |
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253 | |
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254 | /** |
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255 | * |
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256 | */ |
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257 | private boolean isTextInput(ITask task) { |
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258 | if (task.getInstances().size() > 0) { |
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259 | ITaskInstance instance = task.getInstances().iterator().next(); |
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260 | if (instance instanceof IEventTaskInstance) { |
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261 | return ((IEventTaskInstance) instance).getEvent().getType() instanceof TextInput; |
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262 | } |
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263 | } |
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264 | |
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265 | return false; |
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266 | } |
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267 | |
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268 | /** |
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269 | * |
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270 | */ |
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271 | private void calculateStatistics(IEventTask node, TextInputStatistics statistics) { |
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272 | |
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273 | for (ITaskInstance instance : node.getInstances()) { |
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274 | IEventType type = ((IEventTaskInstance) instance).getEvent().getType(); |
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275 | IEventTarget target = ((IEventTaskInstance) instance).getEvent().getTarget(); |
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276 | |
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277 | if (type instanceof TextInput) { |
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278 | String[] fragments = |
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279 | determineTextFragments(((TextInput) type).getEnteredText()); |
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280 | |
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281 | if (target instanceof ITextField) { |
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282 | statistics.addTextFieldInput(node, fragments); |
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283 | } |
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284 | else if (target instanceof ITextArea) { |
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285 | statistics.addTextAreaInput(node, fragments); |
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286 | } |
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287 | } |
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288 | } |
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289 | } |
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290 | |
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291 | /** |
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292 | * |
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293 | */ |
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294 | private String[] determineTextFragments(String enteredText) { |
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295 | List<String> fragments = new ArrayList<String>(); |
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296 | |
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297 | StringBuffer fragment = new StringBuffer(); |
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298 | char lastChar = 0; |
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299 | |
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300 | for (int i = 0; i < enteredText.length(); i++) { |
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301 | char currentChar = enteredText.charAt(i); |
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302 | |
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303 | if (!isEqualCharacterType(lastChar, currentChar)) { |
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304 | // the previous fragment ended. so finalize it and start a new one |
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305 | if ((fragment != null) && (fragment.length() > 0)) { |
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306 | fragments.add(fragment.toString()); |
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307 | fragment = new StringBuffer(); |
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308 | } |
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309 | } |
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310 | |
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311 | fragment.append(currentChar); |
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312 | lastChar = currentChar; |
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313 | } |
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314 | |
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315 | if ((fragment != null) && (fragment.length() > 0)) { |
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316 | fragments.add(fragment.toString()); |
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317 | } |
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318 | |
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319 | return fragments.toArray(new String[fragments.size()]); |
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320 | } |
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321 | |
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322 | /** |
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323 | * |
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324 | */ |
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325 | private boolean isEqualCharacterType(char char1, char char2) { |
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326 | return |
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327 | ((char1 == char2) || |
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328 | (Character.isWhitespace(char1) && Character.isWhitespace(char2)) || |
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329 | (Character.isDigit(char1) && Character.isDigit(char2)) || |
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330 | (Character.isLetter(char1) && Character.isLetter(char2)) || |
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331 | (Character.isJavaIdentifierPart(char1) && Character.isJavaIdentifierPart(char2))); |
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332 | } |
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333 | |
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334 | /** |
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335 | * TODO comment |
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336 | * |
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337 | * @version $Revision: $ $Date: 16.07.2012$ |
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338 | * @author 2012, last modified by $Author: pharms$ |
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339 | */ |
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340 | public static class TextInputStatistics { |
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341 | |
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342 | /** */ |
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343 | private List<Object[]> textFieldInputs = new ArrayList<Object[]>(); |
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344 | |
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345 | /** */ |
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346 | private List<Object[]> textAreaInputs = new ArrayList<Object[]>(); |
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347 | |
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348 | /** */ |
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349 | private int otherEventsCount; |
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350 | |
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351 | /** |
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352 | * |
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353 | */ |
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354 | public void addTextFieldInput(IEventTask node, String[] fragments) { |
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355 | textFieldInputs.add(new Object[] { node, fragments }); |
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356 | } |
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357 | |
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358 | /** |
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359 | * |
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360 | */ |
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361 | public void addTextAreaInput(IEventTask node, String[] fragments) { |
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362 | textAreaInputs.add(new Object[] { node, fragments }); |
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363 | } |
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364 | |
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365 | /** |
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366 | * |
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367 | */ |
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368 | public int getNoOfAllEvents() { |
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369 | return textFieldInputs.size() + textAreaInputs.size() + otherEventsCount; |
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370 | } |
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371 | |
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372 | /** |
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373 | * |
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374 | */ |
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375 | public int getNoOfTextFieldInputs() { |
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376 | return textFieldInputs.size(); |
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377 | } |
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378 | |
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379 | /** |
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380 | * |
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381 | */ |
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382 | public String[] getTextFieldInputFragments(int index) { |
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383 | return (String[]) textFieldInputs.get(index)[1]; |
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384 | } |
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385 | |
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386 | /** |
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387 | * |
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388 | */ |
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389 | public int getNoOfTextAreaInputs() { |
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390 | return textAreaInputs.size(); |
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391 | } |
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392 | |
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393 | /** |
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394 | * |
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395 | */ |
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396 | public String[] getTextAreaInputFragments(int index) { |
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397 | return (String[]) textAreaInputs.get(index)[1]; |
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398 | } |
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399 | |
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400 | /** |
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401 | * |
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402 | */ |
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403 | public void incrementNoOfOtherEventTasks() { |
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404 | otherEventsCount++; |
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405 | } |
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406 | |
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407 | } |
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408 | |
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409 | } |
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