lite
Version:
A cross platform template engine base on xml/html and javascript expression.
294 lines (284 loc) • 8.06 kB
JavaScript
var uncompressed = /^[\t ]{2}|^\s*\/\/|\/\**[\r\n]/m;
function tokenCompress(source,file,root){
source = String(source).replace(/\r\n?/g,'\n');
if(source.search(uncompressed)<0){
return source;
}
var ps = partitionJavaScript(source,file,root);
var result = [];
for(var i =0;i<ps.length;i++){
var item = ps[i];
switch(item.charAt()){
case '\'':
case '\"':
result.push(item);//string
break;
case '/':
//skip comment && reserve condition comment and regexp
var stat = item.match(/^\/(?:(\*\s*@)|\/|\*)/);
if(!stat || stat[1]){
result.push(item);//regexp or condition comment
}
break;
default:
//result.push(item.replace(/^[ \t]+/gm,''));//被切开的语法块，前置换行，可能上上一个语法的结束语法，不能删除
//console.log('%%<',item.replace(/^(\r\n?|\n)+|(\s)+/gm,'$1$2'),">%%")
result.push(item.replace(/(\n)+|([^\S\r\n])+/gm,'$1$2').replace(/(?:([\r\n])+\s*)+/g,'$1'));
}
}
return result.join('');
}
var compressedCache = []
function compressJS(source,file,root){
source = source.replace(/^\/\*[\s\S]*?\*\/\s*/g,'')
var i = compressedCache.indexOf(source);
if(i>=0){
if(i%2 == 0){
var kv = compressedCache.splice(i,2)
compressedCache.push(kv[0],kv[1]);
return kv[1];
}else{
return source;
}
};
var result = source;
var sample = source.slice(source.length/10,source.length/1.1);
//console.log(sample.length )
if(sample.length < 200 || sample.match(uncompressed)){
try{
result= tokenCompress(source,file,root);
}catch(e){
result= tokenCompress('this.x='+source,file,root).replace(/^this.x=|(});$/g,'$1') ;
}
}
compressedCache.push(source,result);
if(compressedCache.length>64){
compressedCache.shift();
compressedCache.shift();
}
return result;
}
var TYPE_COMMENT=0, TYPE_SOURCE =1, TYPE_STRING =2, TYPE_REGEXP=3;
/**
* 如何token
* 如何补全; 能不补全就不补全
*/
function partitionJavaScript(source,file,root){
/* *
var exp1 = /\\.|[^\\\r\n\[\/]+/ // ']' is valid char
var exp2 = /\[(?:\\.|[^\\\r\n\]])+]\]/ //'[' '/' is valid in []
var exp = /\/(?:\\.|[^\\\r\n\[\/]+|\[(?:\\.|[^\\\r\n\]])+]\])*\/(?:[img]*\b|(?=[^\w]))/
var xml = /<(?=(?:[A-Za-z_][\w_\-\.]*(?:\:[\w\-\.]*)?)(?:\s*\/?>|\s+\w))/i
/* */
var regexp = /'(?:\\.|[^'])*'|"(?:\\.|[^"])*"|\/\/.*|\/\*[\s\S]*?\*\/|\/(?=[^*\/].*\/(?:[img]*\b|[^\w]))|<(?=(?:[A-Za-z_][\w_\-\.]*(?:\:[\w\-\.]*)?)(?:\s*\/?>|\s+\w))/i;
var m,result = [],latestType=-1;//not comment string regexp
source = source.replace(/\r\n|\r/g,'\n');
function append(token,type){
//console.log([token,type])
if(token){
if(latestType == type){
result[result.length-1]+=token;
}else{
result.push(token);
latestType = type;
}
}
}
function appendXML(xml){
var preIndex = result.length-1;
var prev = result[preIndex];
//(param1,param2){return <xml/>}
var preFunctionMatch = prev.match(/(?:(\([\w\s,]*\))(\{\s*(?:return\s*)?))?$/);
if(preFunctionMatch){
var params = preFunctionMatch[1];
var functionQute = preFunctionMatch[2];
//console.log("###",match)
}
var args = params&¶ms.replace(/[\s()]/g,'').split(',')||[];
var fn = parseTemplate(xml,file,{
root:root,
params:args||[]
})
var fnCode = String(fn).replace(/^\s+|\s+$/g,'');
if(functionQute){
prev = prev.slice(0,prev.length-preFunctionMatch[0].length+1);
result[preIndex] = prev+fnCode.replace(/^[^(]+.|\}[^}]*$/g,'')
}else{
var m = fnCode.match(/^function\([\w\s,]*\)\{\s*return/);
if(m){
result[preIndex] = prev+fnCode.substring(m[0].length).replace(/;?\s*\}[^}]*$/,'')
}else{
result[preIndex] = prev+'('+fnCode+')()';
}
}
}
//console.log(source)
regexp.lastIndex = 0;
while(m = regexp.exec(source)){
//console.log('line:'+m)
if(m){
var index = m.index;
var m = m[0];
var xml = m == '<'
//console.log(m)
if(m == '/' || xml){
append(source.substring(0,index),TYPE_SOURCE)
var m2 = (xml ?findXML:findExp)(result,source.substring(index));
//console.log("exp:"+source.substr(index,5))
if(m2){
m = m2;
if(xml){
appendXML(m);
}else{
append(m,TYPE_REGEXP)
}
}else{
//避免误判为xml或者regexp
append(m.replace(/^\//,'\t\/'),TYPE_SOURCE);
}
}else{//string,comment,other-source
append(source.substring(0,index),TYPE_SOURCE)
switch(m.charAt()){
case '\'':
case '\"':
append(m,TYPE_STRING);//string
break;
case '/':
var m2 = m.charAt(1);
if(m2=='*' || m2 == '/'){//?maby code?
append(m,TYPE_COMMENT);//string
break;
}
default:
append(m,TYPE_SOURCE);//code
}
}
source = source.substring(m.length+index);
}else{
break;
}
}
append(source,TYPE_SOURCE);
return result;
}
/**
*
运算符 ‘/’ 优先考虑
var i=0;
if(i)alert(1)//...
/alert(2)/i
=> var i=0;if(i){alert(1)/alert(2)/i}
忽略 CDATA/textarea
*/
function findXML(result,source){
var tag = source.match(/^<([a-z_][\w_\-\.]*(?:\:[a-z_][\w_\-\.]*)?)(?:\s*[\/>]|\s+[\w_])/i);
if(tag){
tag = tag[1];
tag = tag.replace(/\.\-/g,'\\$&');
var reg = new RegExp('<(/)?'+tag,'g');
var depth = 0;
reg.lastIndex = 0;
while(tag = reg.exec(source)){
if(tag[1]){
if(--depth == 0){
return source.substring(0,tag.index+tag[0].length+1)
}else if(depth<0){
return null;
}
}else{
depth++;
}
}
}else{
return null;
}
}
function parseTemplate(xml,file,options){
var m = xml.match(/^([\w\-\/\.]+)(#.*)?$/)
if(m){
var attr = m[2];
//console.log(file,m)
var buf =["<c:include path='",m[1],"' "];
if(attr && attr.length>1){
buf.push('selector="',attr.substr(1).replace(/["]/g,'"'),'"/>')
}else{
buf.push('/>')
}
xml = buf.join('')
}
//console.log('inline xml file:',root,file)
var parser = new (require('xmldom').DOMParser)({
locator:{systemId:file||options.root},
xmlns:{
c:'http://www.xidea.org/lite/core',
h:'http://www.xidea.org/lite/html-ext'
}
});
xml = parser.parseFromString(xml,'text/html');
return require('lite').parseLite(xml,options);
}
/**
* ''/b/ // a
* /xxx\///2; /**\/ //b=2;
*/
function findExp(result,source){
var i = result.length;
while(i--){
var line = result[i];
//console.log(["reg check line:",line])
if(!/^\/[\/*]|^\s+$/.test(line)){//ignore common or space
line = line.replace(/\s+$/,'');
if(/^['"]|^\/.+\/$/.test(line)){//regexp,string can't lead the regexp
break;
}else if(/\b(?:new|instanceof|typeof)$/.test(line)){//operator can lead regexp value
return findExpSource(source);
}else if(/(?:[)\]}]|[\w_]|--|\+\+)$/.test(line)){//value-token, postfix-operator-token,++/-- can't lead the regexp;
break;
}else{
return findExpSource(source);
}
}
}
}
function findExpSource(text){
var depth=0,c,start = 1;
while(c = text.charAt(start++)){
if(c =='\n' || c == '\r'){
//console.log('line end for reg search!')
return;
}
if(c=='['){
depth = 1;
}else if(c==']'){
depth = 0;
}else if (c == '\\') {
start++;
}else if(depth == 0 && c == '/'){
outer:
while(c = text.charAt(start++)){
switch(c){
case 'g':
case 'i':
case 'm':
break;
default:
if(/\w/.test(c)){
//console.log('invalid regexp flag:'+c)
return null;
}else{
break outer;
}
}
}
//console.error(text.substring(0,start-1)+'@',text)
text = text.substring(0,start-1);
//console.log(text)
return text;
}
}
//console.log('file end for reg search!')
}
if(typeof require == 'function'){
exports.partitionJavaScript=partitionJavaScript;
exports.compressJS=compressJS;
}