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1 /* This file defines an XML parser, with a few kludges to make it
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2 * useable for HTML. autoSelfClosers defines a set of tag names that
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3 * are expected to not have a closing tag, and doNotIndent specifies
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4 * the tags inside of which no indentation should happen (see Config
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5 * object). These can be disabled by passing the editor an object like
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6 * {useHTMLKludges: false} as parserConfig option.
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7 */
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8
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9 var XMLParser = Editor.Parser = (function() {
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10 var Kludges = {
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11 autoSelfClosers: {"br": true, "img": true, "hr": true, "link": true, "input": true,
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12 "meta": true, "col": true, "frame": true, "base": true, "area": true},
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13 doNotIndent: {"pre": true, "!cdata": true}
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14 };
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15 var NoKludges = {autoSelfClosers: {}, doNotIndent: {"!cdata": true}};
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16 var UseKludges = Kludges;
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17 var alignCDATA = false;
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18
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19 // Simple stateful tokenizer for XML documents. Returns a
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20 // MochiKit-style iterator, with a state property that contains a
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21 // function encapsulating the current state. See tokenize.js.
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22 var tokenizeXML = (function() {
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23 function inText(source, setState) {
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24 var ch = source.next();
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25 if (ch == "<") {
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26 if (source.equals("!")) {
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27 source.next();
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28 if (source.equals("[")) {
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29 if (source.lookAhead("[CDATA[", true)) {
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30 setState(inBlock("xml-cdata", "]]>"));
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31 return null;
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32 }
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33 else {
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34 return "xml-text";
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35 }
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36 }
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37 else if (source.lookAhead("--", true)) {
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38 setState(inBlock("xml-comment", "-->"));
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39 return null;
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40 }
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41 else if (source.lookAhead("DOCTYPE", true)) {
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42 source.nextWhileMatches(/[\w\._\-]/);
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43 setState(inBlock("xml-doctype", ">"));
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44 return "xml-doctype";
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45 }
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46 else {
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47 return "xml-text";
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48 }
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49 }
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50 else if (source.equals("?")) {
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51 source.next();
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52 source.nextWhileMatches(/[\w\._\-]/);
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53 setState(inBlock("xml-processing", "?>"));
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54 return "xml-processing";
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55 }
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56 else {
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57 if (source.equals("/")) source.next();
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58 setState(inTag);
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59 return "xml-punctuation";
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60 }
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61 }
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62 else if (ch == "&") {
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63 while (!source.endOfLine()) {
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64 if (source.next() == ";")
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65 break;
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66 }
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67 return "xml-entity";
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68 }
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69 else {
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70 source.nextWhileMatches(/[^&<\n]/);
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71 return "xml-text";
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72 }
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73 }
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74
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75 function inTag(source, setState) {
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76 var ch = source.next();
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77 if (ch == ">") {
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78 setState(inText);
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79 return "xml-punctuation";
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80 }
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81 else if (/[?\/]/.test(ch) && source.equals(">")) {
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82 source.next();
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83 setState(inText);
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84 return "xml-punctuation";
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85 }
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86 else if (ch == "=") {
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87 return "xml-punctuation";
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88 }
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89 else if (/[\'\"]/.test(ch)) {
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90 setState(inAttribute(ch));
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91 return null;
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92 }
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93 else {
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94 source.nextWhileMatches(/[^\s\u00a0=<>\"\'\/?]/);
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95 return "xml-name";
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96 }
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97 }
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98
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99 function inAttribute(quote) {
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100 return function(source, setState) {
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101 while (!source.endOfLine()) {
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102 if (source.next() == quote) {
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103 setState(inTag);
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104 break;
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105 }
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106 }
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107 return "xml-attribute";
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108 };
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109 }
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110
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111 function inBlock(style, terminator) {
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112 return function(source, setState) {
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113 while (!source.endOfLine()) {
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114 if (source.lookAhead(terminator, true)) {
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115 setState(inText);
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116 break;
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117 }
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118 source.next();
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119 }
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120 return style;
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121 };
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122 }
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123
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124 return function(source, startState) {
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125 return tokenizer(source, startState || inText);
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126 };
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127 })();
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128
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129 // The parser. The structure of this function largely follows that of
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130 // parseJavaScript in parsejavascript.js (there is actually a bit more
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131 // shared code than I'd like), but it is quite a bit simpler.
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132 function parseXML(source) {
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133 var tokens = tokenizeXML(source), token;
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134 var cc = [base];
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135 var tokenNr = 0, indented = 0;
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136 var currentTag = null, context = null;
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137 var consume;
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138
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139 function push(fs) {
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140 for (var i = fs.length - 1; i >= 0; i--)
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141 cc.push(fs[i]);
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142 }
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143 function cont() {
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144 push(arguments);
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145 consume = true;
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146 }
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147 function pass() {
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148 push(arguments);
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149 consume = false;
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150 }
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151
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152 function markErr() {
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153 token.style += " xml-error";
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154 }
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155 function expect(text) {
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156 return function(style, content) {
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157 if (content == text) cont();
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158 else {markErr(); cont(arguments.callee);}
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159 };
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160 }
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161
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162 function pushContext(tagname, startOfLine) {
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163 var noIndent = UseKludges.doNotIndent.hasOwnProperty(tagname) || (context && context.noIndent);
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164 context = {prev: context, name: tagname, indent: indented, startOfLine: startOfLine, noIndent: noIndent};
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165 }
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166 function popContext() {
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167 context = context.prev;
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168 }
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169 function computeIndentation(baseContext) {
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170 return function(nextChars, current) {
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171 var context = baseContext;
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172 if (context && context.noIndent)
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173 return current;
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174 if (alignCDATA && /<!\[CDATA\[/.test(nextChars))
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175 return 0;
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176 if (context && /^<\//.test(nextChars))
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177 context = context.prev;
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178 while (context && !context.startOfLine)
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179 context = context.prev;
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180 if (context)
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181 return context.indent + indentUnit;
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182 else
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183 return 0;
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184 };
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185 }
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186
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187 function base() {
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188 return pass(element, base);
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189 }
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190 var harmlessTokens = {"xml-text": true, "xml-entity": true, "xml-comment": true, "xml-processing": true, "xml-doctype": true};
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191 function element(style, content) {
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192 if (content == "<") cont(tagname, attributes, endtag(tokenNr == 1));
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193 else if (content == "</") cont(closetagname, expect(">"));
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194 else if (style == "xml-cdata") {
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195 if (!context || context.name != "!cdata") pushContext("!cdata");
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196 if (/\]\]>$/.test(content)) popContext();
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197 cont();
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198 }
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199 else if (harmlessTokens.hasOwnProperty(style)) cont();
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200 else {markErr(); cont();}
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201 }
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202 function tagname(style, content) {
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203 if (style == "xml-name") {
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204 currentTag = content.toLowerCase();
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205 token.style = "xml-tagname";
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206 cont();
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207 }
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208 else {
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209 currentTag = null;
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210 pass();
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211 }
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212 }
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213 function closetagname(style, content) {
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214 if (style == "xml-name") {
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215 token.style = "xml-tagname";
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216 if (context && content.toLowerCase() == context.name) popContext();
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217 else markErr();
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218 }
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219 cont();
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220 }
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221 function endtag(startOfLine) {
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222 return function(style, content) {
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223 if (content == "/>" || (content == ">" && UseKludges.autoSelfClosers.hasOwnProperty(currentTag))) cont();
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224 else if (content == ">") {pushContext(currentTag, startOfLine); cont();}
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225 else {markErr(); cont(arguments.callee);}
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226 };
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227 }
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228 function attributes(style) {
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229 if (style == "xml-name") {token.style = "xml-attname"; cont(attribute, attributes);}
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230 else pass();
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231 }
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232 function attribute(style, content) {
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233 if (content == "=") cont(value);
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234 else if (content == ">" || content == "/>") pass(endtag);
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235 else pass();
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236 }
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237 function value(style) {
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238 if (style == "xml-attribute") cont(value);
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239 else pass();
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240 }
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241
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242 return {
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243 indentation: function() {return indented;},
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244
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245 next: function(){
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246 token = tokens.next();
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247 if (token.style == "whitespace" && tokenNr == 0)
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248 indented = token.value.length;
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249 else
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250 tokenNr++;
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251 if (token.content == "\n") {
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252 indented = tokenNr = 0;
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253 token.indentation = computeIndentation(context);
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254 }
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255
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256 if (token.style == "whitespace" || token.type == "xml-comment")
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257 return token;
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258
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259 while(true){
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260 consume = false;
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261 cc.pop()(token.style, token.content);
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262 if (consume) return token;
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263 }
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264 },
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265
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266 copy: function(){
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267 var _cc = cc.concat([]), _tokenState = tokens.state, _context = context;
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268 var parser = this;
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269
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270 return function(input){
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271 cc = _cc.concat([]);
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272 tokenNr = indented = 0;
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273 context = _context;
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274 tokens = tokenizeXML(input, _tokenState);
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275 return parser;
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276 };
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277 }
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278 };
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279 }
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280
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281 return {
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282 make: parseXML,
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283 electricChars: "/",
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284 configure: function(config) {
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285 if (config.useHTMLKludges != null)
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286 UseKludges = config.useHTMLKludges ? Kludges : NoKludges;
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287 if (config.alignCDATA)
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288 alignCDATA = config.alignCDATA;
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289 }
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290 };
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291 })();
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