/*
* HTML Parser By John Resig (ejohn.org)
* Original code by Erik Arvidsson, Mozilla Public License
* http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
*
* // Use like so:
* HTMLParser(htmlString, {
* start: function(tag, attrs, unary) {},
* end: function(tag) {},
* chars: function(text) {},
* comment: function(text) {}
* });
*
* // or to get an XML string:
* HTMLtoXML(htmlString);
*
* // or to get an XML DOM Document
* HTMLtoDOM(htmlString);
*
* // or to inject into an existing document/DOM node
* HTMLtoDOM(htmlString, document);
* HTMLtoDOM(htmlString, document.body);
*
*/
(function() {
// Regular Expressions for parsing tags and attributes
var startTag = /^<(\w+)((?:\s+\w+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/,
endTag = /^<\/(\w+)[^>]*>/,
attr = /(\w+)(?:\s*=\s*(?:(?:"((?:\\.|[^"])*)")|(?:'((?:\\.|[^'])*)')|([^>\s]+)))?/g;
// Empty Elements - HTML 4.01
var empty = makeMap("area,base,basefont,br,col,frame,hr,img,input,isindex,link,meta,param,embed");
// Block Elements - HTML 4.01
var block = makeMap("address,applet,blockquote,button,center,dd,del,dir,div,dl,dt,fieldset,form,frameset,hr,iframe,ins,isindex,li,map,menu,noframes,noscript,object,ol,p,pre,script,table,tbody,td,tfoot,th,thead,tr,ul");
// Inline Elements - HTML 4.01
var 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,object,q,s,samp,script,select,small,span,strike,strong,sub,sup,textarea,tt,u,var");
// Elements that you can, intentionally, leave open
// (and which close themselves)
var closeSelf = makeMap("colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr");
// Attributes that have their values filled in disabled="disabled"
var fillAttrs = makeMap("checked,compact,declare,defer,disabled,ismap,multiple,nohref,noresize,noshade,nowrap,readonly,selected");
// Special Elements (can contain anything)
var special = makeMap("script,style");
var HTMLParser = this.HTMLParser = function(html, handler) {
var index, chars, match, stack = [], last = html;
stack.last = function() {
return this[this.length - 1];
};
// Skip DOCTYPE and other stuffs and go directly to the ");
if (index >= 0) {
if (handler.comment)
handler.comment(html.substring(4, index));
html = html.substring(index + 3);
chars = false;
}
// end tag
} else if (html.indexOf("/g, "$1").replace(//g, "$1");
html = html.substring(html.indexOf(">", tagClosePos) + 1);
if (handler.chars)
handler.chars(text);
parseEndTag("", stack.last());
}
if (html == last)
throw "Parse Error: " + html;
last = html;
}
// Clean up any remaining tags
parseEndTag();
function parseStartTag(tag, tagName, rest, unary) {
if (tagName)
tagName = tagName.toLowerCase();
if (block[tagName]) {
while (stack.last() && inline[stack.last()]) {
parseEndTag("", stack.last());
}
}
if (closeSelf[tagName] && stack.last() == tagName) {
parseEndTag("", tagName);
}
unary = empty[tagName] || !!unary;
if (!unary)
stack.push(tagName);
if (handler.start) {
var attrs = [];
rest.replace(attr, function(match, name) {
var value = arguments[2] ? arguments[2] :
arguments[3] ? arguments[3] :
arguments[4] ? arguments[4] :
fillAttrs[name] ? name : "";
attrs.push({
name: name.toLowerCase(),
value: value,
escaped: value.replace(/(^|[^\\])"/g, '$1\\\"') //"
});
});
if (handler.start)
handler.start(tagName, attrs, unary);
}
}
function parseEndTag(tag, tagName) {
if (tagName)
tagName = tagName.toLowerCase();
// If no tag name is provided, clean shop
if (!tagName)
var pos = 0;
// Find the closest opened tag of the same type
else
for (var pos = stack.length - 1; pos >= 0; pos--)
if (stack[pos] == tagName)
break;
if (pos >= 0) {
// Close all the open elements, up the stack
for (var i = stack.length - 1; i >= pos; i--)
if (handler.end)
handler.end(stack[i]);
// Remove the open elements from the stack
stack.length = pos;
}
}
};
this.HTMLtoXML = function(html) {
var results = "";
HTMLParser(html, {
start: function(tag, attrs, unary) {
results += "<" + tag;
for (var i = 0; i < attrs.length; i++)
results += " " + attrs[i].name + '="' + attrs[i].escaped + '"';
results += (unary ? "/" : "") + ">";
},
end: function(tag) {
results += "";
},
chars: function(text) {
results += text;
},
comment: function(text) {
results += "";
}
});
return results;
};
this.HTMLtoDOM = function(html, doc) {
// There can be only one of these elements
var one = makeMap("html,head,body,title");
// Enforce a structure for the document
var structure = {
link: "head",
base: "head"
};
if (!doc) {
if (typeof DOMDocument != "undefined")
doc = new DOMDocument();
else if (typeof document != "undefined" && document.implementation && document.implementation.createDocument)
doc = document.implementation.createDocument("", "", null);
else if (typeof ActiveX != "undefined")
doc = new ActiveXObject("Msxml.DOMDocument");
} else
doc = doc.ownerDocument ||
doc.getOwnerDocument && doc.getOwnerDocument() ||
doc;
var elems = [],
documentElement = doc.documentElement ||
doc.getDocumentElement && doc.getDocumentElement();
// If we're dealing with an empty document then we
// need to pre-populate it with the HTML document structure
if (!documentElement && doc.createElement) (function() {
var html = doc.createElement("html");
var head = doc.createElement("head");
head.appendChild(doc.createElement("title"));
html.appendChild(head);
html.appendChild(doc.createElement("body"));
doc.appendChild(html);
})();
// Find all the unique elements
if (doc.getElementsByTagName)
for (var i in one)
one[i] = doc.getElementsByTagName(i)[0];
// If we're working with a document, inject contents into
// the body element
var curParentNode = one.body;
HTMLParser(html, {
start: function(tagName, attrs, unary) {
// If it's a pre-built element, then we can ignore
// its construction
if (one[tagName]) {
curParentNode = one[tagName];
return;
}
var elem = doc.createElement(tagName);
for (var attr in attrs)
elem.setAttribute(attrs[attr].name, attrs[attr].value);
if (structure[tagName] && typeof one[structure[tagName]] != "boolean")
one[structure[tagName]].appendChild(elem);
else if (curParentNode && curParentNode.appendChild)
curParentNode.appendChild(elem);
if (!unary) {
elems.push(elem);
curParentNode = elem;
}
},
end: function(tag) {
elems.length -= 1;
// Init the new parentNode
curParentNode = elems[elems.length - 1];
},
chars: function(text) {
curParentNode.appendChild(doc.createTextNode(text));
},
comment: function(text) {
// create comment node
}
});
return doc;
};
function makeMap(str) {
var obj = {}, items = str.split(",");
for (var i = 0; i < items.length; i++)
obj[items[i]] = true;
return obj;
}
})();