source: imaps-frontend/node_modules/html-minifier-terser/src/htmlparser.js@ 79a0317

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Last change on this file since 79a0317 was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 4 days ago

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1/*!
2 * HTML Parser By John Resig (ejohn.org)
3 * Modified by Juriy "kangax" Zaytsev
4 * Original code by Erik Arvidsson, Mozilla Public License
5 * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
6 */
7
8/*
9 * // Use like so:
10 * HTMLParser(htmlString, {
11 * start: function(tag, attrs, unary) {},
12 * end: function(tag) {},
13 * chars: function(text) {},
14 * comment: function(text) {}
15 * });
16 *
17 * // or to get an XML string:
18 * HTMLtoXML(htmlString);
19 *
20 * // or to get an XML DOM Document
21 * HTMLtoDOM(htmlString);
22 *
23 * // or to inject into an existing document/DOM node
24 * HTMLtoDOM(htmlString, document);
25 * HTMLtoDOM(htmlString, document.body);
26 *
27 */
28
29/* global ActiveXObject, DOMDocument */
30
31'use strict';
32
33var createMapFromString = require('./utils').createMapFromString;
34var replaceAsync = require('./utils').replaceAsync;
35
36function makeMap(values) {
37 return createMapFromString(values, true);
38}
39
40// Regular Expressions for parsing tags and attributes
41var singleAttrIdentifier = /([^\s"'<>/=]+)/,
42 singleAttrAssigns = [/=/],
43 singleAttrValues = [
44 // attr value double quotes
45 /"([^"]*)"+/.source,
46 // attr value, single quotes
47 /'([^']*)'+/.source,
48 // attr value, no quotes
49 /([^ \t\n\f\r"'`=<>]+)/.source
50 ],
51 // https://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-QName
52 qnameCapture = (function() {
53 // based on https://www.npmjs.com/package/ncname
54 var combiningChar = '\\u0300-\\u0345\\u0360\\u0361\\u0483-\\u0486\\u0591-\\u05A1\\u05A3-\\u05B9\\u05BB-\\u05BD\\u05BF\\u05C1\\u05C2\\u05C4\\u064B-\\u0652\\u0670\\u06D6-\\u06E4\\u06E7\\u06E8\\u06EA-\\u06ED\\u0901-\\u0903\\u093C\\u093E-\\u094D\\u0951-\\u0954\\u0962\\u0963\\u0981-\\u0983\\u09BC\\u09BE-\\u09C4\\u09C7\\u09C8\\u09CB-\\u09CD\\u09D7\\u09E2\\u09E3\\u0A02\\u0A3C\\u0A3E-\\u0A42\\u0A47\\u0A48\\u0A4B-\\u0A4D\\u0A70\\u0A71\\u0A81-\\u0A83\\u0ABC\\u0ABE-\\u0AC5\\u0AC7-\\u0AC9\\u0ACB-\\u0ACD\\u0B01-\\u0B03\\u0B3C\\u0B3E-\\u0B43\\u0B47\\u0B48\\u0B4B-\\u0B4D\\u0B56\\u0B57\\u0B82\\u0B83\\u0BBE-\\u0BC2\\u0BC6-\\u0BC8\\u0BCA-\\u0BCD\\u0BD7\\u0C01-\\u0C03\\u0C3E-\\u0C44\\u0C46-\\u0C48\\u0C4A-\\u0C4D\\u0C55\\u0C56\\u0C82\\u0C83\\u0CBE-\\u0CC4\\u0CC6-\\u0CC8\\u0CCA-\\u0CCD\\u0CD5\\u0CD6\\u0D02\\u0D03\\u0D3E-\\u0D43\\u0D46-\\u0D48\\u0D4A-\\u0D4D\\u0D57\\u0E31\\u0E34-\\u0E3A\\u0E47-\\u0E4E\\u0EB1\\u0EB4-\\u0EB9\\u0EBB\\u0EBC\\u0EC8-\\u0ECD\\u0F18\\u0F19\\u0F35\\u0F37\\u0F39\\u0F3E\\u0F3F\\u0F71-\\u0F84\\u0F86-\\u0F8B\\u0F90-\\u0F95\\u0F97\\u0F99-\\u0FAD\\u0FB1-\\u0FB7\\u0FB9\\u20D0-\\u20DC\\u20E1\\u302A-\\u302F\\u3099\\u309A';
55 var digit = '0-9\\u0660-\\u0669\\u06F0-\\u06F9\\u0966-\\u096F\\u09E6-\\u09EF\\u0A66-\\u0A6F\\u0AE6-\\u0AEF\\u0B66-\\u0B6F\\u0BE7-\\u0BEF\\u0C66-\\u0C6F\\u0CE6-\\u0CEF\\u0D66-\\u0D6F\\u0E50-\\u0E59\\u0ED0-\\u0ED9\\u0F20-\\u0F29';
56 var extender = '\\xB7\\u02D0\\u02D1\\u0387\\u0640\\u0E46\\u0EC6\\u3005\\u3031-\\u3035\\u309D\\u309E\\u30FC-\\u30FE';
57 var letter = 'A-Za-z\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u0131\\u0134-\\u013E\\u0141-\\u0148\\u014A-\\u017E\\u0180-\\u01C3\\u01CD-\\u01F0\\u01F4\\u01F5\\u01FA-\\u0217\\u0250-\\u02A8\\u02BB-\\u02C1\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03CE\\u03D0-\\u03D6\\u03DA\\u03DC\\u03DE\\u03E0\\u03E2-\\u03F3\\u0401-\\u040C\\u040E-\\u044F\\u0451-\\u045C\\u045E-\\u0481\\u0490-\\u04C4\\u04C7\\u04C8\\u04CB\\u04CC\\u04D0-\\u04EB\\u04EE-\\u04F5\\u04F8\\u04F9\\u0531-\\u0556\\u0559\\u0561-\\u0586\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0621-\\u063A\\u0641-\\u064A\\u0671-\\u06B7\\u06BA-\\u06BE\\u06C0-\\u06CE\\u06D0-\\u06D3\\u06D5\\u06E5\\u06E6\\u0905-\\u0939\\u093D\\u0958-\\u0961\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8B\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AE0\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B36-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB5\\u0BB7-\\u0BB9\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C33\\u0C35-\\u0C39\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CDE\\u0CE0\\u0CE1\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D28\\u0D2A-\\u0D39\\u0D60\\u0D61\\u0E01-\\u0E2E\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E45\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD\\u0EAE\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0F40-\\u0F47\\u0F49-\\u0F69\\u10A0-\\u10C5\\u10D0-\\u10F6\\u1100\\u1102\\u1103\\u1105-\\u1107\\u1109\\u110B\\u110C\\u110E-\\u1112\\u113C\\u113E\\u1140\\u114C\\u114E\\u1150\\u1154\\u1155\\u1159\\u115F-\\u1161\\u1163\\u1165\\u1167\\u1169\\u116D\\u116E\\u1172\\u1173\\u1175\\u119E\\u11A8\\u11AB\\u11AE\\u11AF\\u11B7\\u11B8\\u11BA\\u11BC-\\u11C2\\u11EB\\u11F0\\u11F9\\u1E00-\\u1E9B\\u1EA0-\\u1EF9\\u1F00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2126\\u212A\\u212B\\u212E\\u2180-\\u2182\\u3007\\u3021-\\u3029\\u3041-\\u3094\\u30A1-\\u30FA\\u3105-\\u312C\\u4E00-\\u9FA5\\uAC00-\\uD7A3';
58 var ncname = '[' + letter + '_][' + letter + digit + '\\.\\-_' + combiningChar + extender + ']*';
59 return '((?:' + ncname + '\\:)?' + ncname + ')';
60 })(),
61 startTagOpen = new RegExp('^<' + qnameCapture),
62 startTagClose = /^\s*(\/?)>/,
63 endTag = new RegExp('^<\\/' + qnameCapture + '[^>]*>'),
64 doctype = /^<!DOCTYPE\s?[^>]+>/i;
65
66var IS_REGEX_CAPTURING_BROKEN = false;
67'x'.replace(/x(.)?/g, function(m, g) {
68 IS_REGEX_CAPTURING_BROKEN = g === '';
69});
70
71// Empty Elements
72var empty = makeMap('area,base,basefont,br,col,embed,frame,hr,img,input,isindex,keygen,link,meta,param,source,track,wbr');
73
74// Inline Elements
75var inline = makeMap('a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,noscript,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,svg,textarea,tt,u,var');
76
77// Elements that you can, intentionally, leave open
78// (and which close themselves)
79var closeSelf = makeMap('colgroup,dd,dt,li,option,p,td,tfoot,th,thead,tr,source');
80
81// Attributes that have their values filled in disabled='disabled'
82var fillAttrs = makeMap('checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected');
83
84// Special Elements (can contain anything)
85var special = makeMap('script,style');
86
87// HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
88// Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content
89var nonPhrasing = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,ol,optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,title,tr,track,ul');
90
91var reCache = {};
92
93function attrForHandler(handler) {
94 var pattern = singleAttrIdentifier.source +
95 '(?:\\s*(' + joinSingleAttrAssigns(handler) + ')' +
96 '[ \\t\\n\\f\\r]*(?:' + singleAttrValues.join('|') + '))?';
97 if (handler.customAttrSurround) {
98 var attrClauses = [];
99 for (var i = handler.customAttrSurround.length - 1; i >= 0; i--) {
100 attrClauses[i] = '(?:' +
101 '(' + handler.customAttrSurround[i][0].source + ')\\s*' +
102 pattern +
103 '\\s*(' + handler.customAttrSurround[i][1].source + ')' +
104 ')';
105 }
106 attrClauses.push('(?:' + pattern + ')');
107 pattern = '(?:' + attrClauses.join('|') + ')';
108 }
109 return new RegExp('^\\s*' + pattern);
110}
111
112function joinSingleAttrAssigns(handler) {
113 return singleAttrAssigns.concat(
114 handler.customAttrAssign || []
115 ).map(function(assign) {
116 return '(?:' + assign.source + ')';
117 }).join('|');
118}
119
120class HTMLParser {
121 constructor(html, handler) {
122 this.html = html;
123 this.handler = handler;
124 }
125
126 async parse() {
127 let html = this.html;
128 const handler = this.handler;
129
130 var stack = [], lastTag;
131 var attribute = attrForHandler(handler);
132 var last, prevTag, nextTag;
133 while (html) {
134 last = html;
135 // Make sure we're not in a script or style element
136 if (!lastTag || !special(lastTag)) {
137 var textEnd = html.indexOf('<');
138 if (textEnd === 0) {
139 // Comment:
140 if (/^<!--/.test(html)) {
141 var commentEnd = html.indexOf('-->');
142
143 if (commentEnd >= 0) {
144 if (handler.comment) {
145 await handler.comment(html.substring(4, commentEnd));
146 }
147 html = html.substring(commentEnd + 3);
148 prevTag = '';
149 continue;
150 }
151 }
152
153 // https://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment
154 if (/^<!\[/.test(html)) {
155 var conditionalEnd = html.indexOf(']>');
156
157 if (conditionalEnd >= 0) {
158 if (handler.comment) {
159 await handler.comment(html.substring(2, conditionalEnd + 1), true /* non-standard */);
160 }
161 html = html.substring(conditionalEnd + 2);
162 prevTag = '';
163 continue;
164 }
165 }
166
167 // Doctype:
168 var doctypeMatch = html.match(doctype);
169 if (doctypeMatch) {
170 if (handler.doctype) {
171 handler.doctype(doctypeMatch[0]);
172 }
173 html = html.substring(doctypeMatch[0].length);
174 prevTag = '';
175 continue;
176 }
177
178 // End tag:
179 var endTagMatch = html.match(endTag);
180 if (endTagMatch) {
181 html = html.substring(endTagMatch[0].length);
182 await replaceAsync(endTagMatch[0], endTag, parseEndTag);
183 prevTag = '/' + endTagMatch[1].toLowerCase();
184 continue;
185 }
186
187 // Start tag:
188 var startTagMatch = parseStartTag(html);
189 if (startTagMatch) {
190 html = startTagMatch.rest;
191 await handleStartTag(startTagMatch);
192 prevTag = startTagMatch.tagName.toLowerCase();
193 continue;
194 }
195
196 // Treat `<` as text
197 if (handler.continueOnParseError) {
198 textEnd = html.indexOf('<', 1);
199 }
200 }
201
202 var text;
203 if (textEnd >= 0) {
204 text = html.substring(0, textEnd);
205 html = html.substring(textEnd);
206 }
207 else {
208 text = html;
209 html = '';
210 }
211
212 // next tag
213 var nextTagMatch = parseStartTag(html);
214 if (nextTagMatch) {
215 nextTag = nextTagMatch.tagName;
216 }
217 else {
218 nextTagMatch = html.match(endTag);
219 if (nextTagMatch) {
220 nextTag = '/' + nextTagMatch[1];
221 }
222 else {
223 nextTag = '';
224 }
225 }
226
227 if (handler.chars) {
228 await handler.chars(text, prevTag, nextTag);
229 }
230 prevTag = '';
231 }
232 else {
233 var stackedTag = lastTag.toLowerCase();
234 var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)</' + stackedTag + '[^>]*>', 'i'));
235
236 html = await replaceAsync(html, reStackedTag, async(_, text) => {
237 if (stackedTag !== 'script' && stackedTag !== 'style' && stackedTag !== 'noscript') {
238 text = text
239 .replace(/<!--([\s\S]*?)-->/g, '$1')
240 .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
241 }
242
243
244 if (handler.chars) {
245 await handler.chars(text);
246 }
247
248 return '';
249 });
250
251 await parseEndTag('</' + stackedTag + '>', stackedTag);
252 }
253
254 if (html === last) {
255 throw new Error('Parse Error: ' + html);
256 }
257 }
258
259 if (!handler.partialMarkup) {
260 // Clean up any remaining tags
261 await parseEndTag();
262 }
263
264 function parseStartTag(input) {
265 var start = input.match(startTagOpen);
266 if (start) {
267 var match = {
268 tagName: start[1],
269 attrs: []
270 };
271 input = input.slice(start[0].length);
272 var end, attr;
273 while (!(end = input.match(startTagClose)) && (attr = input.match(attribute))) {
274 input = input.slice(attr[0].length);
275 match.attrs.push(attr);
276 }
277 if (end) {
278 match.unarySlash = end[1];
279 match.rest = input.slice(end[0].length);
280 return match;
281 }
282 }
283 }
284
285 async function closeIfFound(tagName) {
286 if (findTag(tagName) >= 0) {
287 await parseEndTag('', tagName);
288 return true;
289 }
290 }
291
292 async function handleStartTag(match) {
293 var tagName = match.tagName;
294 var unarySlash = match.unarySlash;
295
296 if (handler.html5) {
297 if (lastTag === 'p' && nonPhrasing(tagName)) {
298 await parseEndTag('', lastTag);
299 }
300 else if (tagName === 'tbody') {
301 await closeIfFound('thead');
302 }
303 else if (tagName === 'tfoot') {
304 if (!await closeIfFound('tbody')) {
305 await closeIfFound('thead');
306 }
307 }
308 if (tagName === 'col' && findTag('colgroup') < 0) {
309 lastTag = 'colgroup';
310 stack.push({ tag: lastTag, attrs: [] });
311 if (handler.start) {
312 await handler.start(lastTag, [], false, '');
313 }
314 }
315 }
316
317 if (!handler.html5 && !inline(tagName)) {
318 while (lastTag && inline(lastTag)) {
319 await parseEndTag('', lastTag);
320 }
321 }
322
323 if (closeSelf(tagName) && lastTag === tagName) {
324 await parseEndTag('', tagName);
325 }
326
327 var unary = empty(tagName) || tagName === 'html' && lastTag === 'head' || !!unarySlash;
328
329 var attrs = match.attrs.map(function(args) {
330 var name, value, customOpen, customClose, customAssign, quote;
331 var ncp = 7; // number of captured parts, scalar
332
333 // hackish work around FF bug https://bugzilla.mozilla.org/show_bug.cgi?id=369778
334 if (IS_REGEX_CAPTURING_BROKEN && args[0].indexOf('""') === -1) {
335 if (args[3] === '') { delete args[3]; }
336 if (args[4] === '') { delete args[4]; }
337 if (args[5] === '') { delete args[5]; }
338 }
339
340 function populate(index) {
341 customAssign = args[index];
342 value = args[index + 1];
343 if (typeof value !== 'undefined') {
344 return '"';
345 }
346 value = args[index + 2];
347 if (typeof value !== 'undefined') {
348 return '\'';
349 }
350 value = args[index + 3];
351 if (typeof value === 'undefined' && fillAttrs(name)) {
352 value = name;
353 }
354 return '';
355 }
356
357 var j = 1;
358 if (handler.customAttrSurround) {
359 for (var i = 0, l = handler.customAttrSurround.length; i < l; i++, j += ncp) {
360 name = args[j + 1];
361 if (name) {
362 quote = populate(j + 2);
363 customOpen = args[j];
364 customClose = args[j + 6];
365 break;
366 }
367 }
368 }
369
370 if (!name && (name = args[j])) {
371 quote = populate(j + 1);
372 }
373
374 return {
375 name: name,
376 value: value,
377 customAssign: customAssign || '=',
378 customOpen: customOpen || '',
379 customClose: customClose || '',
380 quote: quote || ''
381 };
382 });
383
384 if (!unary) {
385 stack.push({ tag: tagName, attrs: attrs });
386 lastTag = tagName;
387 unarySlash = '';
388 }
389
390 if (handler.start) {
391 await handler.start(tagName, attrs, unary, unarySlash);
392 }
393 }
394
395 function findTag(tagName) {
396 var pos;
397 var needle = tagName.toLowerCase();
398 for (pos = stack.length - 1; pos >= 0; pos--) {
399 if (stack[pos].tag.toLowerCase() === needle) {
400 break;
401 }
402 }
403 return pos;
404 }
405
406 async function parseEndTag(tag, tagName) {
407 var pos;
408
409 // Find the closest opened tag of the same type
410 if (tagName) {
411 pos = findTag(tagName);
412 }
413 // If no tag name is provided, clean shop
414 else {
415 pos = 0;
416 }
417
418 if (pos >= 0) {
419 // Close all the open elements, up the stack
420 for (var i = stack.length - 1; i >= pos; i--) {
421 if (handler.end) {
422 handler.end(stack[i].tag, stack[i].attrs, i > pos || !tag);
423 }
424 }
425
426 // Remove the open elements from the stack
427 stack.length = pos;
428 lastTag = pos && stack[pos - 1].tag;
429 }
430 else if (tagName.toLowerCase() === 'br') {
431 if (handler.start) {
432 await handler.start(tagName, [], true, '');
433 }
434 }
435 else if (tagName.toLowerCase() === 'p') {
436 if (handler.start) {
437 await handler.start(tagName, [], false, '', true);
438 }
439 if (handler.end) {
440 handler.end(tagName, []);
441 }
442 }
443 }
444 }
445}
446
447exports.HTMLParser = HTMLParser;
448exports.HTMLtoXML = function(html) {
449 var results = '';
450
451 new HTMLParser(html, {
452 start: function(tag, attrs, unary) {
453 results += '<' + tag;
454
455 for (var i = 0, len = attrs.length; i < len; i++) {
456 results += ' ' + attrs[i].name + '="' + (attrs[i].value || '').replace(/"/g, '&#34;') + '"';
457 }
458
459 results += (unary ? '/' : '') + '>';
460 },
461 end: function(tag) {
462 results += '</' + tag + '>';
463 },
464 chars: function(text) {
465 results += text;
466 },
467 comment: function(text) {
468 results += '<!--' + text + '-->';
469 },
470 ignore: function(text) {
471 results += text;
472 }
473 });
474
475 return results;
476};
477
478exports.HTMLtoDOM = function(html, doc) {
479 // There can be only one of these elements
480 var one = {
481 html: true,
482 head: true,
483 body: true,
484 title: true
485 };
486
487 // Enforce a structure for the document
488 var structure = {
489 link: 'head',
490 base: 'head'
491 };
492
493 if (doc) {
494 doc = doc.ownerDocument || doc.getOwnerDocument && doc.getOwnerDocument() || doc;
495 }
496 else if (typeof DOMDocument !== 'undefined') {
497 doc = new DOMDocument();
498 }
499 else if (typeof document !== 'undefined' && document.implementation && document.implementation.createDocument) {
500 doc = document.implementation.createDocument('', '', null);
501 }
502 else if (typeof ActiveX !== 'undefined') {
503 doc = new ActiveXObject('Msxml.DOMDocument');
504 }
505
506 var elems = [],
507 documentElement = doc.documentElement ||
508 doc.getDocumentElement && doc.getDocumentElement();
509
510 // If we're dealing with an empty document then we
511 // need to pre-populate it with the HTML document structure
512 if (!documentElement && doc.createElement) {
513 (function() {
514 var html = doc.createElement('html');
515 var head = doc.createElement('head');
516 head.appendChild(doc.createElement('title'));
517 html.appendChild(head);
518 html.appendChild(doc.createElement('body'));
519 doc.appendChild(html);
520 })();
521 }
522
523 // Find all the unique elements
524 if (doc.getElementsByTagName) {
525 for (var i in one) {
526 one[i] = doc.getElementsByTagName(i)[0];
527 }
528 }
529
530 // If we're working with a document, inject contents into
531 // the body element
532 var curParentNode = one.body;
533
534 new HTMLParser(html, {
535 start: function(tagName, attrs, unary) {
536 // If it's a pre-built element, then we can ignore
537 // its construction
538 if (one[tagName]) {
539 curParentNode = one[tagName];
540 return;
541 }
542
543 var elem = doc.createElement(tagName);
544
545 for (var attr in attrs) {
546 elem.setAttribute(attrs[attr].name, attrs[attr].value);
547 }
548
549 if (structure[tagName] && typeof one[structure[tagName]] !== 'boolean') {
550 one[structure[tagName]].appendChild(elem);
551 }
552 else if (curParentNode && curParentNode.appendChild) {
553 curParentNode.appendChild(elem);
554 }
555
556 if (!unary) {
557 elems.push(elem);
558 curParentNode = elem;
559 }
560 },
561 end: function(/* tag */) {
562 elems.length -= 1;
563
564 // Init the new parentNode
565 curParentNode = elems[elems.length - 1];
566 },
567 chars: function(text) {
568 curParentNode.appendChild(doc.createTextNode(text));
569 },
570 comment: function(/* text */) {
571 // create comment node
572 },
573 ignore: function(/* text */) {
574 // What to do here?
575 }
576 });
577
578 return doc;
579};
580
581exports.endTag = endTag;
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