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sax.js
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sax.js
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//var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
function XMLReader(){
var reader = this;
this._stack = [{nsMap:{},nsStack:{}}];
this._entityReplacer = function(a){//no this
//<>&&qute;  
return _entityReplacer(a,reader);
}
}
function _entityReplacer(a,reader){
var map = reader._entityMap;
var k = a.slice(1,-1);
if(k.charAt(0) == '#'){
return String.fromCharCode(parseInt(k.substr(1).replace('x','0x')))
}else if(k in map){
return map[k];
}else{
reader.errorHandler && reader.errorHandler.error('entity not found:'+a);
return a;
}
}
XMLReader.prototype = {
parse:function(source){
this.contentHandler.startDocument();
parse(this,source);
this.contentHandler.endDocument();
},
_entityMap:{'lt':'<','gt':'>','amp':'&','quot':'"','apos':"'"},
}
function parse(reader,source){
while(true){
var i = source.indexOf('<');
var next = source.charAt(i+1);
if(i<0){
appendText(reader,source,source.length);
return;
}
if(i>0){
appendText(reader,source,i);
source = source.substring(i);
}
if(next == '/'){
var end = source.indexOf('>',3);
var qName = source.substring(2,end);
var config = reader._stack.pop();
source = source.substring(end+1);
reader.contentHandler.endElement(config.uri,config.localName,qName);
for(qName in config.nsMap){
reader.contentHandler.endPrefixMapping(qName) ; //reuse qName as prefix
}
// end elment
}else if(next == '?'){// <?...?>
source = parseInstruction(reader,source);
}else if(next == '!'){// <!doctype,<![CDATA,<!--
source = parseDCC(reader,source);
}else{
source = parseElementStart(reader,source);
}
}
}
function parseElementStart(reader,source){
var tokens = split(source);
var qName = tokens[0][0];
var localName = qName.substr(qName.indexOf(':')+1);
var end = tokens.pop();
var nsMap;
var attrs = new Attributes();
var unsetURIs = [];
var len = tokens.length;
var i=1;
while(i<len){
var m = tokens[i++];
var key = m[0];//remove = on next expression
var value = key.charAt(key.length-1) == '='?key.slice(0,-1):key;
var nsp = value.indexOf(':');
var prefix = nsp>0?key.substr(0,nsp):null;
var attr = attrs[attrs.length++] = {prefix:prefix,qName:value,localName:nsp>0?value.substr(nsp+1):value}
if(value == key){//default value
//TODO:check
}else{
//add key value
m = tokens[i++];
key = value;
value = m[0];
nsp = value.charAt(0);
if((nsp == '"' || nsp == "'") && nsp == value.charAt(value.length-1)){
value = value.slice(1,-1);
}
value = value.replace(/&#?\w+;/g,reader._entityReplacer);;
//TODO:encode value
}
if(prefix == 'xmlns' || key=='xmlns'){
attr.uri = 'http://www.w3.org/2000/xmlns/';
(nsMap || (nsMap = {}))[prefix == 'xmlns'?attr.localName:''] = value;
}else if(prefix){
if(prefix == 'xml'){
attr.uri = 'http://www.w3.org/XML/1998/namespace';
}else{
unsetURIs.push(attr);
}
}
attr.value = value;
attr.offset=m.index;
}
var stack = reader._stack;
var top = stack[stack.length-1];
var config = {qName:qName};
var nsStack = top.nsStack;
//print(stack+'#'+nsStack)
nsStack = config.nsStack = (nsMap?_set_proto_(nsMap,nsStack):nsStack);
config.uri = nsStack[qName.slice(0,-localName.length-1)];
while(attr = unsetURIs.pop()){
attr.uri = nsStack[attr.prefix];
}
if(nsMap){
for(prefix in nsMap){
reader.contentHandler.startPrefixMapping(prefix, nsMap[prefix])
}
}
reader.contentHandler.startElement(config.uri,localName,qName,attrs);
if(end[0].charAt() == '/'){
reader.contentHandler.endElement(config.uri,localName,qName);
if(nsMap){
for(prefix in nsMap){
reader.contentHandler.endPrefixMapping(prefix)
}
}
}else{
stack.push(config);
}
return source.substr(end.index + end[0].length)
}
function _set_proto_(thiz,parent){
thiz.__proto__ = parent;
return thiz;
}
if(!(_set_proto_({},_set_proto_.prototype) instanceof _set_proto_)){
_set_proto_ = function(thiz,parent){
function p(){};
p.prototype = parent;
p = new p();
for(parent in thiz){
p[parent] = thiz[parent];
}
return p;
}
}
function split(source){
var match;
var buf = [];
var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
reg.lastIndex = 0;
reg.exec(source);//skip <
while(match = reg.exec(source)){
buf.push(match);
if(match[1])return buf;
}
}
function appendText(reader,source,len){
source = source.substr(0,len).replace(/&#?\w+;/g,reader._entityReplacer);
reader.contentHandler.characters(source,0,len);
}
function parseInstruction(reader,source){
var match = source.match(/^<\?(\S*)\s*([\s\S]*?)\?>/);
if(match){
var len = match[0].length;
reader.contentHandler.processingInstruction(match[1], match[2]) ;
}else{//error
appendText(reader,source,len =2);
}
return source.substring(len);
}
function parseDCC(reader,source){//sure start with '<!'
var next= source.charAt(2)
if(next == '-'){
if(source.charAt(3) == '-'){
var end = source.indexOf('-->');
//append comment source.substring(4,end)//<!--
var lex = reader.lexicalHandler
lex && lex.comment(source,4,end-4);
return source.substring(end+3)
}else{
//error
appendText(reader,source,3)
return source.substr(3);
}
}else{
if(/^<!\[CDATA\[/.test(source)){
var end = source.indexOf(']]>');
var lex = reader.lexicalHandler;
lex && lex.startCDATA();
appendText(reader,source.substring(9,end),0,end-9);
lex && lex.endCDATA()
return source.substring(end+3);
}
//<!DOCTYPE
//startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)
var matchs = split(source);
var len = matchs.length;
if(len>1 && /!doctype/i.test(matchs[0][0])){
var name = matchs[1][0];
var pubid = len>3 && /^public$/i.test(matchs[2][0]) && matchs[3][0]
var sysid = len>4 && matchs[4][0];
var lex = reader.lexicalHandler;
lex && lex.startDTD(name,pubid,sysid);
lex && lex.endDTD();
matchs = matchs[len-1]
return source.substr(matchs.index+matchs[0].length)
}else{
appendText(reader,source,2)
return source.substr(2);
}
}
}
/**
* @param source
*/
function Attributes(source){
}
Attributes.prototype = {
length:0,
getLocalName:function(i){return this[i].localName},
getOffset:function(i){return this[i].offset},
getQName:function(i){return this[i].qName},
getURI:function(i){return this[i].uri},
getValue:function(i){return this[i].value}
// ,getIndex:function(uri, localName)){
// if(localName){
//
// }else{
// var qName = uri
// }
// },
// getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
// getType:function(uri,localName){}
// getType:function(i){},
}
if(typeof require == 'function'){
exports.XMLReader = XMLReader;
}
if(typeof require == 'function'){
exports.XMLReader=XMLReader;
}