dhtmlxcommon.js

dhtmlxGrid 是跨浏览器的 JavaScript 表格控制组件（Grid Control）

/*
Copyright Scand LLC http://www.scbr.com
This version of Software is free for using in GNU GPL applications. For other use or to get Professional Edition please contact [e-mail] to obtain license
*/ 
		/**
          *     @desc: xmlLoader object
          *     @type: private
          *     @param: funcObject - xml parser function
          *     @param: object - jsControl object
          *     @param: async - sync/async mode (async by default)
          *     @param: rSeed - enable/disable random seed ( prevent IE caching)
		  *     @topic: 0
          */	
function dtmlXMLLoaderObject(funcObject, dhtmlObject,async,rSeed){
	this.xmlDoc="";
	if(arguments.length==2)
		this.async=true;
	else
		this.async=async;
	this.onloadAction=funcObject||null;
	this.mainObject=dhtmlObject||null;
    this.waitCall=null;
	this.rSeed=rSeed||false;
	return this;
};
		/**
          *     @desc: xml loading handler
          *     @type: private
          *     @param: dtmlObject - xmlLoader object
		  *     @topic: 0
          */
	dtmlXMLLoaderObject.prototype.waitLoadFunction=function(dhtmlObject){
		this.check=function (){
			if(dhtmlObject.onloadAction!=null){
				if  ((!dhtmlObject.xmlDoc.readyState)||(dhtmlObject.xmlDoc.readyState == 4)){
					dhtmlObject.onloadAction(dhtmlObject.mainObject,null,null,null,dhtmlObject);
                    if (dhtmlObject.waitCall) { dhtmlObject.waitCall(); dhtmlObject.waitCall=null; }
                    dhtmlObject=null;
                    }
			}
		};
		return this.check;
	};

		/**
          *     @desc: return XML top node
		  *     @param: tagName - top XML node tag name (not used in IE, required for Safari and Mozilla)
          *     @type: private
		  *     @returns: top XML node
		  *     @topic: 0  
          */
	dtmlXMLLoaderObject.prototype.getXMLTopNode=function(tagName){
			if (this.xmlDoc.responseXML)  {
				var temp=this.xmlDoc.responseXML.getElementsByTagName(tagName);
				var z=temp[0];
			}else
				var z=this.xmlDoc.documentElement;
			if (z){
				this._retry=false;
				return z;
				}

            if ((_isIE)&&(!this._retry)){
                //fall back to MS.XMLDOM
                var xmlString=this.xmlDoc.responseText;
                this._retry=true;
           			this.xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
           			this.xmlDoc.async=false;
            		this.xmlDoc.loadXML(xmlString);

                    return this.getXMLTopNode(tagName);
            }
            dhtmlxError.throwError("LoadXML","Incorrect XML",[this.xmlDoc,this.mainObject]);
			return document.createElement("DIV");
	};
	
		/**
          *     @desc: load XML from string
          *     @type: private
          *     @param: xmlString - xml string
		  *     @topic: 0  
          */
	dtmlXMLLoaderObject.prototype.loadXMLString=function(xmlString){
     try
	 {
		 var parser = new DOMParser();
		 this.xmlDoc = parser.parseFromString(xmlString,"text/xml");
 }
	 catch(e){
		this.xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
		this.xmlDoc.async=this.async;
		this.xmlDoc.loadXML(xmlString);
	 }
	  this.onloadAction(this.mainObject);
      if (this.waitCall) { this.waitCall(); this.waitCall=null; }
	}
		/**
          *     @desc: load XML
          *     @type: private
          *     @param: filePath - xml file path
          *     @param: postMode - send POST request
          *     @param: postVars - list of vars for post request
		  *     @topic: 0
          */
	dtmlXMLLoaderObject.prototype.loadXML=function(filePath,postMode,postVars){
	 if (this.rSeed) filePath+=((filePath.indexOf("?")!=-1)?"&":"?")+"a_dhx_rSeed="+(new Date()).valueOf();
     this.filePath=filePath;

     if (window.XMLHttpRequest){
	 	this.xmlDoc = new XMLHttpRequest();
		this.xmlDoc.open(postMode?"POST":"GET",filePath,this.async);
        if (postMode)
              this.xmlDoc.setRequestHeader('Content-type','application/x-www-form-urlencoded');
		this.xmlDoc.onreadystatechange=new this.waitLoadFunction(this);
		this.xmlDoc.send(null||postVars);
	 }
	else{

    		if (document.implementation && document.implementation.createDocument)
    		{
    			this.xmlDoc = document.implementation.createDocument("", "", null);
    			this.xmlDoc.onload = new this.waitLoadFunction(this);
				this.xmlDoc.load(filePath);
    		}
    		else
    		{
        			this.xmlDoc = new ActiveXObject("Microsoft.XMLHTTP");
            		this.xmlDoc.open(postMode?"POST":"GET",filePath,this.async);
                    if (postMode) this.xmlDoc.setRequestHeader('Content-type','application/x-www-form-urlencoded');
        			this.xmlDoc.onreadystatechange=new this.waitLoadFunction(this);
            		this.xmlDoc.send(null||postVars);
    		}
  		}
	};
		/**
          *     @desc: destructor, cleans used memory
          *     @type: private
		  *     @topic: 0
          */
    dtmlXMLLoaderObject.prototype.destructor=function(){
        this.onloadAction=null;
	    this.mainObject=null;
        this.xmlDoc=null;
        return null;
    }
	
		/**  
          *     @desc: Call wrapper
          *     @type: private
          *     @param: funcObject - action handler
          *     @param: dhtmlObject - user data
		  *     @returns: function handler
		  *     @topic: 0  
          */
function callerFunction(funcObject,dhtmlObject){
	this.handler=function(e){
		if (!e) e=event;
		funcObject(e,dhtmlObject);
		return true;
	};
	return this.handler;
};

		/**  
          *     @desc: Calculate absolute position of html object
          *     @type: private
          *     @param: htmlObject - html object
		  *     @topic: 0  
          */
function getAbsoluteLeft(htmlObject){
        var xPos = htmlObject.offsetLeft;
        var temp = htmlObject.offsetParent;
        while (temp != null) {
            xPos += temp.offsetLeft;
            temp = temp.offsetParent;
        }
        return xPos;
    }
		/**
          *     @desc: Calculate absolute position of html object
          *     @type: private
          *     @param: htmlObject - html object
		  *     @topic: 0  
          */	
function getAbsoluteTop(htmlObject) {
        var yPos = htmlObject.offsetTop;
        var temp = htmlObject.offsetParent;
        while (temp != null) {
            yPos += temp.offsetTop;
            temp = temp.offsetParent;
        }
        return yPos;
   }
   
   
/**  
*     @desc: Convert string to it boolean representation
*     @type: private
*     @param: inputString - string for covertion
*     @topic: 0  
*/	  
function convertStringToBoolean(inputString){ if (typeof(inputString)=="string") inputString=inputString.toLowerCase();
	switch(inputString){
		case "1":
		case "true":
		case "yes":
		case "y":
		case 1:		
		case true:		
					return true; 
					break;
		default: 	return false;
	}
}

/**  
*     @desc: find out what symbol to use as url param delimiters in further params
*     @type: private
*     @param: str - current url string
*     @topic: 0  
*/
function getUrlSymbol(str){
		if(str.indexOf("?")!=-1)
			return "&"
		else
			return "?"
	}
	
	
function dhtmlDragAndDropObject(){
		this.lastLanding=0;
		this.dragNode=0;
		this.dragStartNode=0;
		this.dragStartObject=0;
		this.tempDOMU=null;
		this.tempDOMM=null;
		this.waitDrag=0;
		if (window.dhtmlDragAndDrop) return window.dhtmlDragAndDrop;
		window.dhtmlDragAndDrop=this;

		return this;
	};
	
	dhtmlDragAndDropObject.prototype.removeDraggableItem=function(htmlNode){
		htmlNode.onmousedown=null;
		htmlNode.dragStarter=null;
		htmlNode.dragLanding=null;
	}
	dhtmlDragAndDropObject.prototype.addDraggableItem=function(htmlNode,dhtmlObject){
		htmlNode.onmousedown=this.preCreateDragCopy;
		htmlNode.dragStarter=dhtmlObject;
		this.addDragLanding(htmlNode,dhtmlObject);
	}
	dhtmlDragAndDropObject.prototype.addDragLanding=function(htmlNode,dhtmlObject){
		htmlNode.dragLanding=dhtmlObject;
	}
	dhtmlDragAndDropObject.prototype.preCreateDragCopy=function(e)
	{
		if (window.dhtmlDragAndDrop.waitDrag) {
			 window.dhtmlDragAndDrop.waitDrag=0;
			 document.body.onmouseup=window.dhtmlDragAndDrop.tempDOMU;
			 document.body.onmousemove=window.dhtmlDragAndDrop.tempDOMM;
			 return false;
		}

		window.dhtmlDragAndDrop.waitDrag=1;
		window.dhtmlDragAndDrop.tempDOMU=document.body.onmouseup;
		window.dhtmlDragAndDrop.tempDOMM=document.body.onmousemove;
		window.dhtmlDragAndDrop.dragStartNode=this;
		window.dhtmlDragAndDrop.dragStartObject=this.dragStarter;
		document.body.onmouseup=window.dhtmlDragAndDrop.preCreateDragCopy;
		document.body.onmousemove=window.dhtmlDragAndDrop.callDrag;

            	if ((e)&&(e.preventDefault)) { e.preventDefault(); return false; }
            	return false;
	};