lite
Version:
A cross platform template engine base on xml/html and javascript expression.
262 lines (251 loc) • 6.56 kB
JavaScript
/*
* List Template
* License LGPL(您可以在任何地方免费使用,但请不要吝啬您对框架本身的改进)
* http://www.xidea.org/project/lite/
* @author jindw
* @version $Id: template.js,v 1.4 2008/02/28 14:39:06 jindw Exp $
*/
exports.OptimizeScope=OptimizeScope;
var Expression=require('js-el').Expression;
var VAR_TYPE=require('./template-token').VAR_TYPE;
var XA_TYPE=require('./template-token').XA_TYPE;
var ELSE_TYPE=require('./template-token').ELSE_TYPE;
var PLUGIN_TYPE=require('./template-token').PLUGIN_TYPE;
var CAPTURE_TYPE=require('./template-token').CAPTURE_TYPE;
var IF_TYPE=require('./template-token').IF_TYPE;
var EL_TYPE=require('./template-token').EL_TYPE;
var BREAK_TYPE=require('./template-token').BREAK_TYPE;
var XT_TYPE=require('./template-token').XT_TYPE;
var FOR_TYPE=require('./template-token').FOR_TYPE;
function OptimizeScope(code,params){
this.code = code;
/**
* @see org.xidea.lite.parse.OptimizeScope#getParams()
*/
this.params = params?params.concat():[];
/**
* @see org.xidea.lite.parse.OptimizeScope#getVars()
*/
this.vars = [];
/**
* @see org.xidea.lite.parse.OptimizeScope#getCalls()
*/
this.calls = [];
/**
* @see org.xidea.lite.parse.OptimizeScope#getRefs()
*/
this.refs = [];
/**
* @see org.xidea.lite.parse.OptimizeScope#getExternalRefs()
*/
this.externalRefs = [];
/**
* 所有for信息数组,按深度优先出现顺序放置[_forStack 描述的是当前for深度]
*/
this.fors = [];
/**
* 所有函数定义数组
*/
this.defs = [];
this.defMap = {};
this.paramMap = listMap(this.params,{});
this.varMap = {}
this._forStack = [];
vistLite(this,this.code = code);
delete this._forStack;
this.callMap =listMap(this.calls, {});
this.refMap =listMap(this.refs, {});
this.externalRefMap =listMap(this.externalRefs, {});
}
function listMap(list,map){
var i = list.length;
while(i--){
var n = list[i];
if(n in map){
map[n]+=1;
}else{
map[n] = 1;
}
}
return map;
}
function ForStatus(code){
this.code = code;
this.index;
this.lastIndex;
this.ref;
this.depth
//this.beforeStatus
}
function vistDef(context,item){
var config = item[2];
var params = config.params;
var defaults = config.defaults;
//def can not change!!. use cache
var def = item[-1]||new OptimizeScope(item[1],params);
def.name = config.name;
def.defaults = config.defaults;
context.fors = context.fors.concat(def.fors)
context.defs.push(def.name);
context.defMap[def.name] = def;
def.defs = context.defs;
def.defMap = context.defMap;
}
function vistLite(context,code){
if(code == null){
return null;
}
for(var i=0;i<code.length;i++){
var item = code[i];
if(item instanceof Array){
var type = item[0];
//el
switch (type) {
case VAR_TYPE:
case EL_TYPE:
case XA_TYPE:
case XT_TYPE:
walkEL(context, item[1]);
break;
case IF_TYPE:
case ELSE_TYPE:
case FOR_TYPE:
walkEL(context, item[2]);
break;
// case Template.PLUGIN_TYPE:
// case Template.BREAK_TYPE:
// case Template.CAPTURE_TYPE:
// break;
}
//child
switch (type) {
case PLUGIN_TYPE:
var className = item[2]['class'];
if(className == 'org.xidea.lite.DefinePlugin'){
vistDef(context,item);
}else if(className == 'org.xidea.lite.parse.ClientPlugin'){
//doFindClient(item);
}else if(className == 'org.xidea.lite.EncodePlugin'
||className =='org.xidea.lite.DatePlugin'
||className =='org.xidea.lite.ModulePlugin'){
vistLite(context,item[1]);
}else{
console.info('unknow plugin',item[2])
}
break;
case CAPTURE_TYPE:
case IF_TYPE:
case ELSE_TYPE:
vistLite(context,item[1]);
break;
case FOR_TYPE:
enterFor(context,item);
addVar(context,item[3]);
vistLite(context,item[1]);
exitFor(context);
break;
// case XA_TYPE:
// case XT_TYPE:
// case EL_TYPE:
// case VAR_TYPE:
}
//var
switch(type){
case CAPTURE_TYPE:
case VAR_TYPE:
addVar(context,item[2]);
addVar(context,item[2]);
}
}
}
}
function enterFor(context,forCode){
var fs = new ForStatus(forCode);
fs.depth = context._forStack.length;
context.fors.push(fs)
context._forStack.push(fs)
}
function exitFor(context){
context._forStack.pop()
}
function addVar(context,n){
context.vars.push(n);
var map = context.varMap;
if(n in map){
map[n]+=1;
}else{
map[n] = 1;
}
}
/* ============================= */
function walkEL(thiz,el){
if(el == null){
return;
}
var varMap = new Expression(el).getVarMap();
//console.log(new Expression(el))
for(var varName in varMap){
var list = varMap[varName];
var len = list.length;
if(varName == 'for'){
//
for(var i =0;i<len;i++){
var p = list[i];
if(p == ''){
setForStatus(thiz,'*');
}else if(p == 'index' || p == 'lastIndex'){
setForStatus(thiz,p);
}else{
console.error('for 不能有index，lastIndex 之外的其他属性');
setForStatus(thiz,'*');
}
}
}else{
if(!(varName in thiz.varMap || varName in thiz.paramMap)){
thiz.externalRefs.push(varName);
}
thiz.refs.push(varName);
}
}
var callMap = new Expression(el).getCallMap();
for(var callName in callMap){
var list = callMap[callName];
var len = list.length;
for(var i =0;i<len;i++){
if(varName in thiz.varMap
//@see javadoc OptimizeUtil#walkEL
|| varName in thiz.paramMap
){
thiz.calls.push('*');
}else if(varName){// ignore ''//constants
thiz.calls.push(varName);
}
}
}
}
function setForStatus(thiz,attrName){
var fs = thiz._forStack[thiz._forStack.length-1];
if(fs){
if(attrName == 'index'){fs.index =true;}
else if(attrName == 'lastIndex'){fs.lastIndex =true;}
else if(attrName == '*'){fs.ref = true;}
else{throw new Error("for不支持属性:"+attrName);}
}else{
throw new Error("for 变量不能在循环外使用:for."+attrName);
}
}
///**
// * 遍历Lite的表达式结构，收集表达式信息
// */
//function ELStatus(tokens){
// this.tree = tokens;
// this.refs = [];
// this.re
// this.callMap = {};
// /**
// * for 状态设置
// */
// this.forIndex = false;
// this.forLastIndex = false;
// this.tree && walkEL(this,this.tree)
//}