1 | package de.ugoe.cs.swe.bnftools.ui.formatter;
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2 |
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3 | import java.util.ArrayList;
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4 | import java.util.Iterator;
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5 |
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6 | import org.apache.commons.lang.StringEscapeUtils;
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7 | import org.apache.commons.lang.StringUtils;
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8 | import org.eclipse.emf.ecore.EObject;
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9 | import org.eclipse.xtext.parsetree.LeafNode;
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10 | import org.eclipse.xtext.parsetree.NodeUtil;
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11 |
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12 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf;
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13 | import de.ugoe.cs.swe.bnftools.ebnf.Import;
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14 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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15 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference;
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16 | import de.ugoe.cs.swe.bnftools.ebnf.SectionHeading;
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17 | import de.ugoe.cs.swe.bnftools.ebnf.StringRule;
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18 |
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19 | public class EbnfHtmlFormatterVisitor extends EbnfFormatterVisitor {
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20 |
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21 | private ArrayList<MetaTextEntry> metaTexts = new ArrayList<MetaTextEntry>();
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22 | private ArrayList<MetaTextEntry> transformedTexts = new ArrayList<MetaTextEntry>();
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23 | private int lastMetaTextBlock = 0;
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24 | private boolean isParagraphOpen = false;
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25 |
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26 | public EbnfHtmlFormatterVisitor(EObject rootNode, FormatterConfig config) {
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27 | super(rootNode, config);
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28 | this.config = config;
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29 | buf = new StringBuffer();
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30 | }
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31 |
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32 | protected void weaveComments() {
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33 | bufferPositionOriginalText = 0;
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34 | bufferPositionFormattedTextNoWhitespaces = 0;
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35 | bufferPositionFormattedText = 0;
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36 |
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37 | StringBuffer result = new StringBuffer();
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38 | formattedTextNoWhitespaces = buf.toString().replaceAll("[ \t\n\r]", "");
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39 | formattedText = buf.toString();
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40 |
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41 | MetaTextEntry currentMetaText = null;
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42 | if (metaTexts.iterator().hasNext())
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43 | currentMetaText = metaTexts.iterator().next();
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44 |
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45 | MetaTextEntry currentTransformedText = null;
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46 | if (transformedTexts.iterator().hasNext())
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47 | currentTransformedText = transformedTexts.iterator().next();
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48 |
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49 | while (bufferPositionFormattedTextNoWhitespaces <= formattedTextNoWhitespaces.length()) {
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50 | skipWhitespacesOriginalText();
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51 | skipWhitespacesFormattedText(result);
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52 |
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53 | if (!(bufferPositionOriginalText < originalText.length()))
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54 | break;
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55 |
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56 | char formattedPositionNoWhitespaces;
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57 | if (bufferPositionFormattedTextNoWhitespaces == formattedTextNoWhitespaces.length()) {
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58 | formattedPositionNoWhitespaces = ' ';
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59 | } else {
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60 | formattedPositionNoWhitespaces = formattedTextNoWhitespaces.charAt(bufferPositionFormattedTextNoWhitespaces);
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61 | }
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62 | char originalPosition = originalText.charAt(bufferPositionOriginalText);
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63 |
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64 | if (formattedPositionNoWhitespaces != originalPosition) {
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65 | // if ((currentMetaText != null) && (bufferPositionFormattedTextNoWhitespaces == currentMetaText.getOffset())) {
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66 | // result.append(currentMetaText.getText());
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67 | // metaTexts.remove(currentMetaText);
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68 | // if (metaTexts.iterator().hasNext())
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69 | // currentMetaText = metaTexts.iterator().next();
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70 | // else
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71 | // currentMetaText = null;
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72 | // }
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73 |
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74 | if (formattedPositionNoWhitespaces == ';') { // formatted text always outputs the optional semicolon, skip it if necessary
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75 | bufferPositionFormattedTextNoWhitespaces++;
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76 | bufferPositionFormattedText++;
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77 | } else if (isCommentNext(originalText, bufferPositionOriginalText)) {
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78 | LeafNode currentComment = allComments.get(allCommentsPosition);
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79 | if (currentComment.getTotalOffset() == bufferPositionOriginalText) {
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80 | if (isMultiLineComment(currentComment.getText())) {
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81 | int newLinesCount = scanBackNewlinesCount(originalText, bufferPositionOriginalText-1);
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82 | if (newLinesCount > 0) {
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83 | if (scanBackNewlinesCount(result.toString(), result.toString().length()-1) == 0) {
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84 | result.append("\n\n");
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85 | }
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86 |
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87 | result.append(currentComment.getText());
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88 | result.append("\n");
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89 | } else {
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90 | String lastWhiteSpaces = scanBackWhitespaces(result.toString(), result.toString().length()-1);
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91 | result.delete(result.toString().length() - lastWhiteSpaces.length(), result.toString().length());
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92 | result.append(" " + stripEndingNewline(currentComment.getText()));
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93 | result.append(lastWhiteSpaces);
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94 | }
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95 | } else if (isSingleLineComment(currentComment.getText())) {
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96 | int newLinesCount = scanBackNewlinesCount(originalText, bufferPositionOriginalText-1);
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97 | String lastWhiteSpaces = scanBackWhitespaces(result.toString(), result.toString().length()-1);
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98 | result.delete(result.toString().length() - lastWhiteSpaces.length(), result.toString().length());
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99 | if (newLinesCount > 0) {
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100 | result.append("\n\n" + stripEndingNewline(currentComment.getText()));
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101 | } else {
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102 | result.append(" " + stripEndingNewline(currentComment.getText()));
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103 | }
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104 | result.append(lastWhiteSpaces);
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105 | }
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106 | bufferPositionOriginalText+=currentComment.getLength();
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107 | allCommentsPosition++;
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108 | }
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109 | } else { // disaster handling: return original unformatted text!
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110 | System.err.println("Disaster Recovery: returning original text!!");
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111 | buf = new StringBuffer();
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112 | buf.append(originalText);
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113 | return;
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114 | }
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115 | } else {
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116 | while (lastMetaTextBlock == 0 && (currentMetaText != null) && (bufferPositionFormattedTextNoWhitespaces >= currentMetaText.getOffset())) {
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117 | result.append(currentMetaText.getText());
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118 | metaTexts.remove(currentMetaText);
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119 | if (metaTexts.iterator().hasNext())
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120 | currentMetaText = metaTexts.iterator().next();
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121 | else
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122 | currentMetaText = null;
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123 |
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124 | if ((currentMetaText == null) && (bufferPositionFormattedTextNoWhitespaces != currentMetaText.getOffset()))
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125 | lastMetaTextBlock = 1;
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126 | }
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127 |
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128 | if (currentTransformedText != null && currentTransformedText.getOffset() == bufferPositionFormattedTextNoWhitespaces) {
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129 | result.append(currentTransformedText.getTransformedText());
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130 | bufferPositionOriginalText += currentTransformedText.getText().length();
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131 | bufferPositionFormattedText += currentTransformedText.getText().length();
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132 | bufferPositionFormattedTextNoWhitespaces += currentTransformedText.getText().replaceAll("[ \t\r\n]", "").length();
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133 | transformedTexts.remove(currentTransformedText);
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134 | currentTransformedText = null;
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135 |
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136 | if (transformedTexts.iterator().hasNext())
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137 | currentTransformedText = transformedTexts.iterator().next();
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138 | } else {
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139 | String text = formattedText.substring(bufferPositionFormattedText, bufferPositionFormattedText+1);
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140 | result.append(text);
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141 | bufferPositionOriginalText++;
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142 | bufferPositionFormattedText++;
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143 | bufferPositionFormattedTextNoWhitespaces++;
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144 | }
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145 |
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146 | while ( lastMetaTextBlock == 1 && currentMetaText != null && bufferPositionFormattedTextNoWhitespaces >= currentMetaText.getOffset()) {
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147 | result.append(currentMetaText.getText());
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148 | metaTexts.remove(currentMetaText);
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149 | if (metaTexts.iterator().hasNext()) {
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150 | currentMetaText = metaTexts.iterator().next();
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151 | } else {
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152 | currentMetaText = null;
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153 | }
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154 |
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155 | if ((currentMetaText == null) || (bufferPositionFormattedTextNoWhitespaces != currentMetaText.getOffset()))
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156 | lastMetaTextBlock = 0;
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157 | }
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158 | }
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159 | }
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160 | while ( bufferPositionFormattedTextNoWhitespaces >= formattedTextNoWhitespaces.length()-1 && currentMetaText != null) {
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161 | result.append(currentMetaText.getText());
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162 | metaTexts.remove(currentMetaText);
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163 | if (metaTexts.iterator().hasNext()) {
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164 | currentMetaText = metaTexts.iterator().next();
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165 | } else {
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166 | currentMetaText = null;
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167 | }
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168 | }
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169 |
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170 |
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171 | buf = result;
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172 | }
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173 |
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174 | protected void metaText(String str) {
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175 | MetaTextEntry metaTextEntry = new MetaTextEntry(str, buf.toString().replaceAll("[ \t\n\r]", "").length());
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176 | metaTexts.add(metaTextEntry);
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177 | }
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178 |
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179 | protected void textTransformed(String original, String transformed) {
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180 | MetaTextEntry metaText = new MetaTextEntry(original, transformed, buf.toString().replaceAll("[ \t\n\r]", "").length());
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181 | transformedTexts.add(metaText);
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182 | buf.append(original);
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183 | newLineOffsetCounter += original.length();
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184 | }
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185 |
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186 | protected void newLine() {
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187 | buf.append("\n");
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188 | if (!isParagraphOpen) {
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189 | metaText("\n<p class=PL style='mso-pagination:widow-orphan lines-together;page-break-after: avoid'>\n");
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190 | isParagraphOpen = true;
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191 | } else {
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192 | metaText("\n</p>\n");
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193 | isParagraphOpen = false;
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194 | }
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195 |
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196 | if ((ruleSpacingStack != null) && (!ruleSpacingStack.empty())) {
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197 | newLineOffsetCounter = ruleSpacingStack.peek();
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198 | } else {
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199 | newLineOffsetCounter = 0;
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200 | }
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201 | }
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202 |
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203 | // -----------------------------------------------------------------------------
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204 |
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205 | protected void visitBefore(EtsiBnf node) {
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206 | parserEtsiBnfNode = NodeUtil.getNodeAdapter(node).getParserNode();
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207 | collectAllComments(parserEtsiBnfNode);
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208 | originalText = NodeUtil.getNodeAdapter(node).getParserNode().serialize();
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209 | originalTextNoWhitespaces = originalText.replaceAll("[ \t\n\r]", "");
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210 |
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211 | textTransformed("grammar " + node.getName(),"");
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212 | if (node.getType() != null)
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213 | textTransformed(node.getType(),"");
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214 | textTransformed(";","");
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215 | metaText("<body lang=EN-US link=blue vlink=purple style='tab-interval:14.15pt'>\n");
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216 | metaText("<div class=WordSection1>\n");
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217 |
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218 | // newLine();
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219 | // newLine();
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220 | }
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221 |
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222 | protected void visitAfter(EtsiBnf node) {
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223 | metaText("</div>\n");
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224 | metaText("</body>\n");
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225 | metaText("</html>\n");
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226 | weaveComments();
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227 | }
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228 |
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229 | protected void visitBefore(Import node) {
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230 | textTransformed("import \"" + node.getImportURI() + "\"","");
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231 | if (node.getGrammarType() != null) {
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232 | textTransformed("/" + node.getGrammarType(), "");
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233 | }
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234 | if (node.getLabel() != null) {
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235 | space();
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236 | textTransformed("label: " + node.getLabel(), "");
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237 | }
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238 | textTransformed(";", "");
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239 | // text("\n");
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240 | }
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241 |
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242 | protected void visitBefore(SectionHeading node) {
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243 | if (!lastWasSectionHeading && !buf.substring(buf.length()-2).equals("\n\n"))
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244 | newLine();
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245 |
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246 | lastWasSectionHeading=true;
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247 |
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248 | metaText("<h3><span lang=EN-GB>\n");
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249 | String text = node.getSectionHeader().replaceAll("[\n\r]", "");
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250 | textTransformed(text, StringEscapeUtils.escapeHtml(text).replaceAll("[\n\r]", ""));
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251 | // textTransformed(text, text.replaceAll("[\t]", "\\<span style='mso-tab-count:1'\\>"));
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252 | metaText("\n</span></h3>\n");
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253 | }
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254 |
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255 | protected void visitAfter(SectionHeading node) {
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256 | }
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257 |
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258 | protected void visitBefore(RuleReference node) {
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259 | wrap();
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260 |
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261 | metaText("<u><span style='color:blue'><a href=\"#T" + node.getRuleref().getName() + "\">");
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262 | text(node.getRuleref().getName());
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263 | metaText("</a></span></u>");
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264 | }
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265 |
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266 | protected void visitAfter(RuleReference node) {
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267 | }
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268 |
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269 | protected void visitBefore(Rule node) {
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270 | // if (lastWasSectionHeading)
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271 | newLine();
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272 |
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273 | lastWasSectionHeading=false;
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274 |
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275 | newLineOffsetCounter = 0;
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276 |
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277 | if (node.getRulenumber() > 0)
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278 | text(node.getRulenumber() + ". ");
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279 |
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280 | metaText("<span lang=EN-GB style='mso-no-proof:no'>\n<a name=\"#T" + node.getName() + "\">");
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281 | textTransformed(node.getName(), node.getName().replaceAll("[ \t\r\n]", ""));
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282 | metaText("</a>");
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283 | text(" ::= ");
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284 |
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285 | rightHandSideRuleOffset = newLineOffsetCounter;
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286 | ruleSpacingStack.push(newLineOffsetCounter);
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287 | }
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288 |
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289 | protected void visitAfter(Rule node) {
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290 | metaText("<o:p></o:p>\n</span>");
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291 | text(";");
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292 | newLine();
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293 | text("\n");
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294 | ruleSpacingStack.pop();
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295 | }
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296 |
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297 | protected void visitBefore(StringRule node) {
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298 | wrap();
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299 | if (node.getLiteral() != null) {
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300 | // text("\"" + node.getLiteral() + "\"");
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301 | textTransformed("\"" + node.getLiteral() + "\"", StringEscapeUtils.escapeHtml("\"" + node.getLiteral() + "\"").replaceAll("[ \t\n\r]", ""));
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302 | // textTransformed("\"" + node.getLiteral() + "\"", "gnabar");
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303 | } else if (node.getColon() != null) {
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304 | // text("\"\"\"");
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305 | textTransformed("\"\"\"", StringEscapeUtils.escapeHtml("\"\"\"").replaceAll("[ \t\n\r]", ""));
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306 | // textTransformed("\"\"\"", "gnabar");
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307 | }
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308 | }
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309 |
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310 | protected void visitAfter(StringRule node) {
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311 | }
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312 | }
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