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88 lines
2.1 KiB
88 lines
2.1 KiB
2 years ago
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/*
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DynAPI Distribution
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dynapi.functions.System extension
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*/
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var f = dynapi.functions;
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f.System = System = {}; // used by dynapi.library
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// System Functions ---------------------------------
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f.coalesce=function(){
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var a,i;
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for(i=0;arguments.length;i++){
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a=arguments[i];
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if(a!=null && a!='' && a!=undefined) return a;
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}
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}
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f.choose = function(index){
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if(isNaN(index)) return;
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if (arguments.length>index) return arguments[index+1];
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};
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f.cloneObject = function(src) {
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if(!src) return;
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var i,tar;
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if(typeof(src)!='object') return src;
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else {
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if((src.constructor+'')==(Array+'')) tar=[];
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else if((src.constructor+'')==(Date+'')) return src;
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else tar={};
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};
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for(i in src) {
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if(typeof(src[i])!='object') tar[i]=src[i];
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else tar[i]=this.cloneObject(src[i]);
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}
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return tar;
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};
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f.copyObject = function(from,to,noclone) {
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var i;
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if (to && !noclone) to=this.cloneObject(to);
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else if(to && noclone) to=to;
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else {
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if(typeof(from)=='object') {
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if((from.constructor+'')==(Array+'')) to=[];
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else if((from.constructor+'')==(Date+'')) return from;
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else to={};
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};
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}
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for(i in from) {
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if(typeof(from[i])!='object') to[i]=from[i];
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else to[i]=this.copyObject(from[i],to[i],true);
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}
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return to;
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};
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f.getElementById = function(id,parentLyr){
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if (document.all) return document.all[id];
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else if(document.getElementById) return document.getElementById(id);
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else if(document.layers){
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var i,nLayers,layer;
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parentLyr = (parentLyr)? parentLyr:document;
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nLayers = parentLyr.layers;
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for (i=0;i<nLayers;i++){
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layer=nLayers[i];
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if (layer.id == id) return layer;
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else if (layer.layers.length){
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layer = this.getElementById(id,layer);
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if (layer) return layer;
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}
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}
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}
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};
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f.isNull=function(value,_default){
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if(value==null||value==''||value=='undefined') return _default;
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else return value;
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};
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f.lookUp = function(value,array){
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var i; if(!array) return;
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for(i=0;i<array.length;i++){
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if(value==array[i]) return i;
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}
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};
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f.nullIf = function(){
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var a,i;
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for(i=0;arguments.length;i++){
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a=arguments[i];
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if(a!=null && a!='' && a!=undefined) return null;
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}
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};
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