lite
Version:
A cross platform template engine base on xml/html and javascript expression.
490 lines (475 loc) • 15.9 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 $
*/
var VAR_LITE_EL_TEMP = "$__el_tmp"
var FOR_STATUS_KEY = '$__for';
/**
* 将Lite的表达式结构转化为php表达式
*/
function stringifyPHPEL(el,context){
var type = el[0];
if(type<=0){//value
return stringifyValue(el,context)
}else if(getTokenParamIndex(type) ==3){//两个操作数
return stringifyInfix(el,context);
}else{
return stringifyPrefix(el,context);
}
}
function stringifyValue(el,context){
var param = el[1];
switch(el[0]){
case VALUE_CONSTANTS:
return stringifyPHP(param);
case VALUE_VAR:
if(param == 'for'){
return FOR_STATUS_KEY;
}else{
return '$'+param;
}
case VALUE_LIST:
case VALUE_MAP:
return "array()";
}
}
function typesOnly(t1,t2){
var i = arguments.length;
var a = 0;
while(--i>1){
a |= arguments[i];
}
var t = t1 | t2;
return (t & a) == t;
}
function stringifyADD(el,context){
var t = getELType(el);
var value1 = stringifyPHPEL(el[1],context);
var value2 = stringifyPHPEL(el[2],context);
if(t == TYPE_NUMBER){
return value1+'+'+value2;//动态部分要考虑 array的问题,这里不需要考虑
}else if(t == TYPE_STRING){
if(/[\d]$/.test(value1)){
value1+=' ';
}
if(/^[\d]/.test(value2)){
value2=' '+value2;
}
//还需要处理 null,true,false 字面量的问题
var t1 = getELType(el[1]);
var t2 = getELType(el[2]);
//console.error(t1,t2)
if(typesOnly(t1,t2,TYPE_STRING,TYPE_NUMBER)){
return value1+'.'+value2;
}
}
//字符串加法不复合交换律
// if(typesOnly(t1,t1,TYPE_NULL,TYPE_NUMBER,TYPE_BOOLEAN)){
// return "lite_op__add_nx("+value1+','+value2+")"
// }
// if(typesOnly(t2,t2,TYPE_NULL,TYPE_NUMBER,TYPE_BOOLEAN)){
// return "lite_op__add_nx("+value2+','+value1+")"
// }
return "lite_op__add("+value1+','+value2+")"
}
//var TYPE_NULL = 1<<offset++;
//var TYPE_BOOLEAN = 1<<offset++;
//var TYPE_NUMBER = 1<<offset++;
//var TYPE_STRING = 1<<offset++;
//var TYPE_ARRAY = 1<<offset++;
//var TYPE_MAP = 1<<offset++;
function stringifyEQ(el,context,opc){
var t1 = getELType(el[1]);
var t2 = getELType(el[2]);
var value1 = stringifyPHPEL(el[1],context);
var value2 = stringifyPHPEL(el[2],context);
opc = opc || '==';
if(t1 == TYPE_STRING || t2 == TYPE_STRING){//0 == 'ttt'=>false
return "strcmp("+value1+","+value2+") "+opc+"0";
}
if(t1 === TYPE_NULL || t2 === TYPE_NULL){
return value1+opc+'='+value2;
}
if(typesOnly(t1,t2,TYPE_NUMBER,TYPE_BOOLEAN)
// ||typesOnly(t1,t2,TYPE_BOOLEAN,TYPE_STRING)//'0' ==false;
// ||typesOnly(t1,t2,TYPE_NUMBER,TYPE_STRING)//'0' == 0
// ||typesOnly(t1,t2,TYPE_NUMBER,TYPE_BOOLEAN)//'0' ==false;"
||typesOnly(t1,t2,TYPE_ARRAY,TYPE_MAP,TYPE_STRING)//'' ==array() => false,忽略array.toString ==//php ;
||t1.toString(2).replace(/0/g,'').length==1 && t1 == t2){
return value1+opc+value2;
}
return (opc=='!='?'!':'')+"lite_op__eq("+value1+','+value2+")"
}
var math = {
"E":2.718281828459045,
"PI":3.141592653589793,
"LN2":0.6931471805599453,
"LN10":2.302585092994046,
"LOG2E":1.4426950408889634,
"LOG10E":0.4342944819032518,
"SQRT1_2":0.7071067811865476,
"SQRT2":1.4142135623730951
}
function stringifyGET(el,context){
var arg1 = el[1];
var arg2 = el[2];
var value1 = stringifyPHPEL(el[1],context);
var value2 = stringifyPHPEL(el[2],context);
if(arg2[0] == VALUE_CONSTANTS){
var prop = arg2[1];
if( prop != 'length'){
//这里有可能要抛警告
if(arg1[0] == VALUE_VAR){
var owner = arg1[1];
if(owner == 'Math' && !(owner in context.scope.defMap && owner in context.scope.varMap && owner in context.scope.paramMap)){
if(typeof math[prop] == 'number'){
return '('+math[prop]+')';
}
}
}
if(!/^[^(][\s\S]*\)$/.test(value1) && !/^(true|false|null|[\d\.]+)$/.test(value1)){//php bug method(args)[index]非法
return value1+'['+value2+']';
}
}
}
return "lite_op__get("+value1+','+value2+")"
}
/**
* return [owner,prop,args]
*/
function parseInvoke(el){
var method = el[1];
if(method[0] == OP_GET){//member_call
var ownerEL = method[1];
var propEL = method[2];
if(ownerEL[0] == VALUE_VAR){
var varName = ownerEL[1];
}
if(propEL[0] == VALUE_CONSTANTS){
var prop = propEL[1];
}
return [varName||ownerEL,prop||propEL,el[2]];
}else{//function_call
if(method[0] == VALUE_VAR){
var varName = method[1];
}
return [varName||method,null,el[2]]
}
}
function stringifyPHPEL2ID(el,context,id){
if(typeof el != 'string'){
return stringifyPHPEL(el,context)
}else if(id){
return '$'+el;
}
return "'"+el+"'";
}
function stringifyINVOKE(el,context){
var info = parseInvoke(el);
var owner = info[0];
var prop = info[1];
var args = stringifyPHPEL(info[2],context);
if(prop){//member_call
if(typeof prop == 'string'){
// random=>rand(0, PHP_INT_MAX
// sin,sqrt,tan,cos,acos,asin,atan,atan2
// max,min,,floor,round,abs,ceil,exp,log,pow,
if(owner === 'Math'){
var mp = /^(?:sin|sqrt|tan|cos|acos|asin|atan|atan2|max|min||floor|round|abs|ceil|exp|log|pow)$/;
if(prop == 'random'){
return '(rand(0, 0xFFFF)/0xFFFF)';
}else if(mp.test(prop)){
return args.replace('array',prop);
}else{
console.warn("Math 不支持方法:"+prop+";Math 支持的方法有:random|"+mp.source.replace(/[^\w\|]/g,''))
}
}else if(owner === 'JSON'){
if(prop == "parse"){
return args.replace('array','json_decode').slice(0,-1)+',true)';
}else if(prop =='stringify'){
return args.replace('array','json_encode');
}else{
console.warn("JSON 不支持方法:"+prop+";JSON 只支持:stringify和parse方法")
}
}else if(prop == 'reverse' && args == 'array()' && owner[0] == OP_INVOKE){
var info2 = parseInvoke(owner);
//console.error(info2);
if(info2[1] == 'concat'){
owner = info2[0];
owner = stringifyPHPEL2ID(owner,context,true)
args = stringifyPHPEL(info2[2],context);
return "lite_op__invoke("+owner+",'concat_reverse',"+args+")"
}
}
}
owner = stringifyPHPEL2ID(owner,context,true)
prop = stringifyPHPEL2ID(prop,context)
return "lite_op__invoke("+owner+","+prop+","+args+")"
//value1 = value1.replace(/.*?,([\s\S]+)\)/,'array($1)');
}else if(typeof owner == 'string'){
if((owner in GLOBAL_DEF_MAP || owner in context.scope.defMap)
&& !(owner in context.scope.varMap || owner in context.scope.paramMap)){
//静态编译方式
return args.replace('array',"lite__"+owner)
}else{
//动态调用方式
//console.error("!!!!!!!!!!!!",context.scope.varMap);
if(owner in context.scope.varMap || owner in context.scope.paramMap){
var fn = '$'+owner;
}else{
var fn = "isset($"+owner+")?$"+owner+":'"+owner+"'";
}
return 'lite_op__invoke('+fn+',null,'+args+')';
}
}else{
//console.error("??????????",typeof owner,owner,context.scope.varMap);
owner = stringifyPHPEL2ID(owner,context,true)
//console.error(owner);
return 'lite_op__invoke('+owner+',null,'+args+')';
//throw new Error("Invalid Invoke EL");
}
}
/**
* 翻译中缀运算符
*/
function stringifyInfix(el,context){
var type = el[0];
if(type == OP_ADD){
return stringifyADD(el,context)
}else if(type == OP_EQ){
return stringifyEQ(el,context,'==')
}else if(type == OP_NE){
return stringifyEQ(el,context,'!=');
}else if(type == OP_GET){
return stringifyGET(el,context);
}else if(type == OP_INVOKE){
return stringifyINVOKE(el,context);
}
var opc = findTokenText(el[0]);
var value1 = stringifyPHPEL(el[1],context);
var value2 = stringifyPHPEL(el[2],context);
switch(type){
case OP_JOIN:
if("array()"==value1){
return "array("+value2+")"
}else{
return value1.slice(0,-1)+','+value2+")"
}
case OP_PUT:
value2 = stringifyPHP(getTokenParam(el))+"=>"+value2+")";
if("array()"==value1){
return "array("+value2
}else{
return value1.slice(0,-1)+','+value2
}
case OP_QUESTION:
//1?2:3 => [QUESTION_SELECT,
// [QUESTION,[CONSTANTS,1],[CONSTANTS,2]],
// [CONSTANTS,3]
// ]
//throw new Error("表达式异常：QUESTION 指令翻译中应该被QUESTION_SELECT跳过");
return null;//前面有一个尝试，此处应返回null，而不是抛出异常。
case OP_QUESTION_SELECT:
/**
${a?b:c}
${a?b1?b2:b3:c}
${222+2|a?b1?b2:b3:c}
*/
var arg1 = el[1];
var test = stringifyPHPEL(arg1[1],context);
var value1 = stringifyPHPEL(arg1[2],context);
//return '('+LITE_INVOKE+OP_NOT+','+test+')?'+value2+":"+value1+')';
return '('+php2jsBoolean(arg1[1],test)+'?'+value1+':'+value2+')'
case OP_AND://&&
if(isSimplePHPEL(value1)){
return '('+php2jsBoolean(el[1],value1)+'?'+value2+':'+value1+')'
}
return '(('+php2jsBoolean(el[1],value1,VAR_LITE_EL_TEMP)+')?'+value2+':'+VAR_LITE_EL_TEMP+')'
case OP_OR://||
if(isSimplePHPEL(value1)){
return '('+php2jsBoolean(el[1],value1)+'?'+value1+':'+value2+')'
}
return '(('+php2jsBoolean(el[1],value1,VAR_LITE_EL_TEMP)+')?'+VAR_LITE_EL_TEMP+':'+value2 +')'
}
value1 = addELQute(el,el[1],value1)
value2 = addELQute(el,el[2],null,value2)
if(opc == '-' || opc == '+'){//-1--2=> -1- -2
if(value2.indexOf(opc) == 0){
opc += ' ';
}
}
return value1 + opc + value2;
}
function stringifyPHP(value) {
switch (typeof value) {
case 'string':
return '\'' + value.replace(/[\\']/g,"\\$&")+ '\'';
case 'number':
if(isNaN(value)){
value = 'null';
}
return ''+value;
case 'undefined':
return 'null';
case 'object':
if (!value) {
return 'null';
}
var buf = [];
if (value instanceof Array) {
var i = value.length;
while (i--) {
buf[i] = stringifyPHP(value[i]) || 'null';
}
return 'array(' + buf.join(',') + ')';
}else if(value instanceof RegExp){
return "array('class'=>'RegExp','source'=>'"+value.replace(/[\\']/g,"\\$&")+"')";
}
for (var k in value) {
var v = stringifyPHP(value[k]);
if (v) {
buf.push(stringifyPHP(k) + '=>' + v);
}
}
return 'array(' + buf.join(',') + ')';
default://boolean
return String(value);
}
}
/**
* 翻译前缀运算符
*/
function stringifyPrefix(el,context){
var type = el[0];
var el1 = el[1];
var value2 = stringifyPHPEL(el1,context);
var param = getTokenParam(el,context);
if(type == OP_NOT){//!
//return value1+'['+value2+']';
var rtv = php2jsBoolean(el1,value2);
if(!isSimplePHPEL(rtv)){
rtv = '('+rtv+')';
}
return '!'+rtv;
}
value2 = addELQute(el,el[1],null,value2)
var opc = findTokenText(type);
return opc+value2;
}
/**
* 如果不是变量或者常量，则必须设置零时变量
*/
function php2jsBoolean(el,value,keepValue,context){
if(!value){
value = stringifyPHPEL(el,context);
}
var op = el[0];
if(op<=0){
switch(op){
case VALUE_CONSTANTS:
if(keepValue){
if(el[1]){
return '(('+keepValue+'='+value+')||true)';
}else{
return '(('+keepValue+'='+value+')&&false)';
}
// }else if(booleanVar){//keepValue 和 booleanVar 只选一个
// if(el[1]){
// return '('+booleanVar+'=true)';
// }else{
// return '('+booleanVar+'=false)';
// }
}else{
return !!el[1]+'';
}
case VALUE_VAR:
break;
case VALUE_LIST:
case VALUE_MAP:
default:
if(keepValue){
return '(('+keepValue+'='+value+')||true)'
}else{
return 'true';
}
}
}
//var TYPE_NULL = 1<<offset++;
//var TYPE_BOOLEAN = 1<<offset++;
//var TYPE_NUMBER = 1<<offset++;
//var TYPE_STRING = 1<<offset++;
//var TYPE_ARRAY = 1<<offset++;
//var TYPE_MAP = 1<<offset++;
//var TYPE_ANY = (1<<offset++) -1;
var type = getELType(el);
if(!((type & TYPE_STRING)||(type & TYPE_ARRAY)||(type & TYPE_MAP))){
if(!keepValue){//持续优化
return value;
}else{
return '('+keepValue +'='+value+')';
}
}
if(isSimplePHPEL(value) && !keepValue){
var rtv = value;
keepValue = value;
}else{
keepValue = keepValue || VAR_LITE_EL_TEMP;
var rtv = "("+keepValue +"="+ value+")"
}
if((type & TYPE_ARRAY)||(type & TYPE_MAP)){
rtv+=' || 0 < '+keepValue;
}
if((type & TYPE_STRING)){
rtv+=" || '0' ==="+keepValue;
}
return '('+rtv+')'
}
function isSimplePHPEL(value){
return value.match(/^([\w_\$]+|[\d\.]+)$/)
}
/**
* 获取某个运算符号的优先级
*/
function getELPriority(el) {
return getPriority(el[0]);
}
if(typeof require == 'function'){
exports.stringifyPHPEL=stringifyPHPEL;
exports.stringifyPHP=stringifyPHP;
exports.php2jsBoolean=php2jsBoolean;
exports.isSimplePHPEL=isSimplePHPEL;
var getTokenParam=require('js-el/src/main/js/expression-token').getTokenParam;
var getTokenParamIndex=require('js-el/src/main/js/expression-token').getTokenParamIndex;
var findTokenText=require('js-el/src/main/js/expression-token').findTokenText;
var getELType=require('js-el/src/main/js/expression-token').getELType;
var addELQute=require('js-el/src/main/js/expression-token').addELQute;
var OP_ADD=require('js-el/src/main/js/expression-token').OP_ADD;
var OP_AND=require('js-el/src/main/js/expression-token').OP_AND;
var OP_EQ=require('js-el/src/main/js/expression-token').OP_EQ;
var OP_GET=require('js-el/src/main/js/expression-token').OP_GET;
var OP_IN=require('js-el/src/main/js/expression-token').OP_IN;
var OP_INVOKE=require('js-el/src/main/js/expression-token').OP_INVOKE;
var OP_JOIN=require('js-el/src/main/js/expression-token').OP_JOIN;
var OP_NE=require('js-el/src/main/js/expression-token').OP_NE;
var OP_NOT=require('js-el/src/main/js/expression-token').OP_NOT;
var OP_OR=require('js-el/src/main/js/expression-token').OP_OR;
var OP_PUT=require('js-el/src/main/js/expression-token').OP_PUT;
var OP_QUESTION=require('js-el/src/main/js/expression-token').OP_QUESTION;
var OP_QUESTION_SELECT=require('js-el/src/main/js/expression-token').OP_QUESTION_SELECT;
var TYPE_ANY=require('js-el/src/main/js/expression-token').TYPE_ANY;
var TYPE_ARRAY=require('js-el/src/main/js/expression-token').TYPE_ARRAY;
var TYPE_BOOLEAN=require('js-el/src/main/js/expression-token').TYPE_BOOLEAN;
var TYPE_MAP=require('js-el/src/main/js/expression-token').TYPE_MAP;
var TYPE_NULL=require('js-el/src/main/js/expression-token').TYPE_NULL;
var TYPE_NUMBER=require('js-el/src/main/js/expression-token').TYPE_NUMBER;
var TYPE_STRING=require('js-el/src/main/js/expression-token').TYPE_STRING;
var VALUE_CONSTANTS=require('js-el/src/main/js/expression-token').VALUE_CONSTANTS;
var VALUE_LIST=require('js-el/src/main/js/expression-token').VALUE_LIST;
var VALUE_MAP=require('js-el/src/main/js/expression-token').VALUE_MAP;
var VALUE_VAR=require('js-el/src/main/js/expression-token').VALUE_VAR;
var getPriority=require('js-el/src/main/js/expression-tokenizer').getPriority;
var GLOBAL_DEF_MAP=require('../js/parse/js-translator').GLOBAL_DEF_MAP;
}