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 |
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11 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf;
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12 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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13 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference;
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14 | import de.ugoe.cs.swe.bnftools.ebnf.SectionHeading;
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15 | import de.ugoe.cs.swe.bnftools.ebnf.StringRule;
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16 |
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17 | public class EbnfHtmlFormatterVisitor extends EbnfFormatterVisitor {
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18 |
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19 | private ArrayList<MetaTextEntry> metaTexts = new ArrayList<MetaTextEntry>();
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20 | private ArrayList<MetaTextEntry> transformedTexts = new ArrayList<MetaTextEntry>();
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21 | private int lastMetaTextBlock = 0;
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22 |
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23 | public EbnfHtmlFormatterVisitor(EObject rootNode, FormatterConfig config) {
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24 | super(rootNode, config);
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25 | this.config = config;
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26 | buf = new StringBuffer();
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27 | }
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28 |
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29 | protected void weaveComments() {
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30 | bufferPositionOriginalText = 0;
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31 | bufferPositionFormattedTextNoWhitespaces = 0;
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32 | bufferPositionFormattedText = 0;
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33 |
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34 | StringBuffer result = new StringBuffer();
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35 | formattedTextNoWhitespaces = buf.toString().replaceAll("[ \t\n\r]", "");
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36 | formattedText = buf.toString();
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37 |
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38 | MetaTextEntry currentMetaText = null;
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39 | if (metaTexts.iterator().hasNext())
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40 | currentMetaText = metaTexts.iterator().next();
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41 |
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42 | MetaTextEntry currentTransformedText = null;
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43 | if (transformedTexts.iterator().hasNext())
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44 | currentTransformedText = transformedTexts.iterator().next();
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45 |
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46 | while (bufferPositionFormattedTextNoWhitespaces <= formattedTextNoWhitespaces.length()) {
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47 | skipWhitespacesOriginalText();
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48 | skipWhitespacesFormattedText(result);
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49 |
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50 | if (!(bufferPositionOriginalText < originalText.length()))
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51 | break;
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52 |
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53 | char formattedPositionNoWhitespaces;
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54 | if (bufferPositionFormattedTextNoWhitespaces == formattedTextNoWhitespaces.length()) {
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55 | formattedPositionNoWhitespaces = ' ';
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56 | } else {
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57 | formattedPositionNoWhitespaces = formattedTextNoWhitespaces.charAt(bufferPositionFormattedTextNoWhitespaces);
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58 | }
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59 | char originalPosition = originalText.charAt(bufferPositionOriginalText);
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60 |
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61 | if (formattedPositionNoWhitespaces != originalPosition) {
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62 | // if ((currentMetaText != null) && (bufferPositionFormattedTextNoWhitespaces == currentMetaText.getOffset())) {
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63 | // result.append(currentMetaText.getText());
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64 | // metaTexts.remove(currentMetaText);
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65 | // if (metaTexts.iterator().hasNext())
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66 | // currentMetaText = metaTexts.iterator().next();
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67 | // else
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68 | // currentMetaText = null;
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69 | // }
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70 |
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71 | if (formattedPositionNoWhitespaces == ';') { // formatted text always outputs the optional semicolon, skip it if necessary
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72 | bufferPositionFormattedTextNoWhitespaces++;
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73 | bufferPositionFormattedText++;
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74 | } else if (isCommentNext(originalText, bufferPositionOriginalText)) {
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75 | LeafNode currentComment = allComments.get(allCommentsPosition);
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76 | if (currentComment.getTotalOffset() == bufferPositionOriginalText) {
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77 | if (isMultiLineComment(currentComment.getText())) {
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78 | int newLinesCount = scanBackNewlinesCount(originalText, bufferPositionOriginalText-1);
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79 | if (newLinesCount > 0) {
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80 | if (scanBackNewlinesCount(result.toString(), result.toString().length()-1) == 0) {
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81 | result.append("\n\n");
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82 | }
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83 |
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84 | result.append(currentComment.getText());
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85 | result.append("\n");
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86 | } else {
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87 | String lastWhiteSpaces = scanBackWhitespaces(result.toString(), result.toString().length()-1);
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88 | result.delete(result.toString().length() - lastWhiteSpaces.length(), result.toString().length());
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89 | result.append(" " + stripEndingNewline(currentComment.getText()));
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90 | result.append(lastWhiteSpaces);
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91 | }
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92 | } else if (isSingleLineComment(currentComment.getText())) {
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93 | int newLinesCount = scanBackNewlinesCount(originalText, bufferPositionOriginalText-1);
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94 | String lastWhiteSpaces = scanBackWhitespaces(result.toString(), result.toString().length()-1);
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95 | result.delete(result.toString().length() - lastWhiteSpaces.length(), result.toString().length());
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96 | if (newLinesCount > 0) {
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97 | result.append("\n\n" + stripEndingNewline(currentComment.getText()));
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98 | } else {
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99 | result.append(" " + stripEndingNewline(currentComment.getText()));
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100 | }
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101 | result.append(lastWhiteSpaces);
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102 | }
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103 | bufferPositionOriginalText+=currentComment.getLength();
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104 | allCommentsPosition++;
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105 | }
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106 | } else { // disaster handling: return original unformatted text!
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107 | System.err.println("Disaster Recovery: returning original text!!");
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108 | buf = new StringBuffer();
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109 | buf.append(originalText);
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110 | return;
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111 | }
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112 | } else {
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113 | if (lastMetaTextBlock == 0 && (currentMetaText != null) && (bufferPositionFormattedTextNoWhitespaces == currentMetaText.getOffset())) {
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114 | result.append(currentMetaText.getText());
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115 | metaTexts.remove(currentMetaText);
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116 | if (metaTexts.iterator().hasNext())
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117 | currentMetaText = metaTexts.iterator().next();
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118 | else
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119 | currentMetaText = null;
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120 | lastMetaTextBlock = 1;
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121 | }
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122 |
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123 | if (currentTransformedText != null && currentTransformedText.getOffset() == bufferPositionFormattedTextNoWhitespaces) {
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124 | result.append(currentTransformedText.getTransformedText());
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125 | bufferPositionOriginalText += currentTransformedText.getText().length();
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126 | bufferPositionFormattedText += currentTransformedText.getText().length();
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127 | bufferPositionFormattedTextNoWhitespaces += currentTransformedText.getText().replaceAll("[ \t\r\n]", "").length();
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128 | transformedTexts.remove(currentTransformedText);
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129 | currentTransformedText = null;
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130 |
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131 | if (transformedTexts.iterator().hasNext())
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132 | currentTransformedText = transformedTexts.iterator().next();
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133 | } else {
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134 | String text = formattedText.substring(bufferPositionFormattedText, bufferPositionFormattedText+1);
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135 | result.append(text);
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136 | bufferPositionOriginalText++;
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137 | bufferPositionFormattedText++;
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138 | bufferPositionFormattedTextNoWhitespaces++;
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139 | }
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140 |
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141 | if (lastMetaTextBlock == 1 && (currentMetaText != null) && (bufferPositionFormattedTextNoWhitespaces == currentMetaText.getOffset())) {
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142 | result.append(currentMetaText.getText());
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143 | metaTexts.remove(currentMetaText);
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144 | if (metaTexts.iterator().hasNext())
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145 | currentMetaText = metaTexts.iterator().next();
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146 | else
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147 | currentMetaText = null;
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148 | lastMetaTextBlock = 0;
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149 | }
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150 | }
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151 | }
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152 | buf = result;
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153 | }
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154 |
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155 | protected void metaText(String str) {
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156 | MetaTextEntry metaTextEntry = new MetaTextEntry(str, buf.toString().replaceAll("[ \t\n\r]", "").length());
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157 | metaTexts.add(metaTextEntry);
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158 | }
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159 |
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160 | protected void textTransformed(String original, String transformed) {
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161 | MetaTextEntry metaText = new MetaTextEntry(original, transformed, buf.toString().replaceAll("[ \t\n\r]", "").length());
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162 | transformedTexts.add(metaText);
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163 | buf.append(original);
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164 | newLineOffsetCounter += original.length();
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165 | }
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166 |
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167 | // -----------------------------------------------------------------------------
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168 |
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169 | protected void visitAfter(EtsiBnf node) {
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170 | weaveComments();
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171 | }
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172 |
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173 | protected void visitBefore(SectionHeading node) {
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174 | if (!lastWasSectionHeading && !buf.substring(buf.length()-2).equals("\n\n"))
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175 | newLine();
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176 |
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177 | lastWasSectionHeading=true;
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178 |
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179 | metaText("<h1>");
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180 | text(node.getSectionHeader().replaceAll("[\n\r]", ""));
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181 | metaText("</h1>");
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182 | }
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183 |
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184 | protected void visitAfter(SectionHeading node) {
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185 | }
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186 |
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187 | protected void visitBefore(RuleReference node) {
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188 | wrap();
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189 |
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190 | metaText("<a href=\"#" + node.getRuleref().getName() + "\">");
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191 | text(node.getRuleref().getName());
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192 | metaText("</a>");
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193 | }
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194 |
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195 | protected void visitAfter(RuleReference node) {
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196 | }
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197 |
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198 | protected void visitBefore(Rule node) {
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199 | if (lastWasSectionHeading)
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200 | newLine();
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201 |
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202 | lastWasSectionHeading=false;
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203 |
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204 | newLineOffsetCounter = 0;
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205 |
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206 | if (node.getRulenumber() > 0)
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207 | text(node.getRulenumber() + ". ");
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208 |
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209 | metaText("<a name=\"#" + node.getName() + "\">");
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210 | text(node.getName());
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211 | metaText("</a>");
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212 | text(" ::= ");
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213 |
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214 | rightHandSideRuleOffset = newLineOffsetCounter;
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215 | ruleSpacingStack.push(newLineOffsetCounter);
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216 | }
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217 |
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218 | protected void visitAfter(Rule node) {
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219 | metaText("<br/>");
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220 | text(";");
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221 | newLine();
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222 | ruleSpacingStack.pop();
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223 | }
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224 |
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225 | protected void visitBefore(StringRule node) {
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226 | wrap();
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227 | if (node.getLiteral() != null) {
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228 | // text("\"" + node.getLiteral() + "\"");
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229 | textTransformed("\"" + node.getLiteral() + "\"", StringEscapeUtils.escapeHtml("\"" + node.getLiteral() + "\""));
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230 | // textTransformed("\"" + node.getLiteral() + "\"", "gnabar");
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231 | } else if (node.getColon() != null) {
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232 | // text("\"\"\"");
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233 | textTransformed("\"\"\"", StringEscapeUtils.escapeHtml("\"\"\""));
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234 | // textTransformed("\"\"\"", "gnabar");
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235 | }
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236 | }
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237 |
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238 | protected void visitAfter(StringRule node) {
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239 | }
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240 | }
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