296 lines
7.8 KiB
JavaScript
296 lines
7.8 KiB
JavaScript
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dojo.provide("dojox.wire.ml.util");
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dojo.require("dojox.xml.parser");
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dojo.require("dojox.wire.Wire");
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dojox.wire.ml._getValue = function(/*String*/source, /*Array*/args){
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// summary:
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// Return a value
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// description:
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// This method obtains an object by an ID of a widget or an DOM
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// element.
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// If 'source' specifies a dotted notation to its property, a Wire is
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// used to get the object property.
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// If 'source' starts with "arguments", 'args' is used as a root
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// object for the Wire.
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// source:
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// A string to specify an object and its property
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// args:
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// An optional arguments array
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// returns:
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// A value
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if(!source){
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return undefined; //undefined
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}
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var property = undefined;
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if(args && source.length >= 9 && source.substring(0, 9) == "arguments"){
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property = source.substring(9);
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return new dojox.wire.Wire({property: property}).getValue(args);
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}
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var i = source.indexOf('.');
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if(i >= 0){
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property = source.substring(i + 1);
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source = source.substring(0, i);
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}
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var object = (dijit.byId(source) || dojo.byId(source) || dojo.getObject(source));
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if(!object){
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return undefined; //undefined
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}
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if(!property){
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return object; //Object
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}else{
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return new dojox.wire.Wire({object: object, property: property}).getValue(); //anything
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}
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};
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dojox.wire.ml._setValue = function(/*String*/target, /*anything*/value){
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// summary:
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// Store a value
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// description:
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// This method stores a value by an ID of a widget or an DOM
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// element with a dotted notation to its property, using a Wire.
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// target:
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// A string to specify an object and its property
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// value:
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// A value
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if(!target){
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return; //undefined
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}
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var i = target.indexOf('.');
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if(i < 0){
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return; //undefined
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}
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var object = this._getValue(target.substring(0, i));
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if(!object){
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return; //undefined
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}
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var property = target.substring(i + 1);
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var wire = new dojox.wire.Wire({object: object, property: property}).setValue(value);
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};
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dojo.declare("dojox.wire.ml.XmlElement", null, {
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// summary:
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// An object wrapping an XML element
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// description:
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// This class represents an XML element.
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constructor: function(/*Element||String*/element){
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// summary:
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// Initialize with an XML element or a tag name
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// element:
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// An XML element or a tag name
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if(dojo.isString(element)){
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element = this._getDocument().createElement(element);
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}
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this.element = element;
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},
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getPropertyValue: function(/*String*/property){
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// summary:
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// Return a property value
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// description:
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// If 'property' starts with '@', the attribute value is returned.
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// If 'property' specifies "text()", the value of the first child
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// text is returned.
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// Otherwise, child elements of the tag name specified with
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// 'property' are returned.
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// property:
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// A property name
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// returns:
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// A property value
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var value = undefined;
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if(!this.element){
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return value; //undefined
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}
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if(!property){
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return value; //undefined
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}
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if(property.charAt(0) == '@'){
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var attribute = property.substring(1);
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value = this.element.getAttribute(attribute);
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}else if(property == "text()"){
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var text = this.element.firstChild;
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if(text){
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value = text.nodeValue;
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}
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}else{ // child elements
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var elements = [];
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for(var i = 0; i < this.element.childNodes.length; i++){
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var child = this.element.childNodes[i];
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if(child.nodeType === 1 /* ELEMENT_NODE */ && child.nodeName == property){
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elements.push(new dojox.wire.ml.XmlElement(child));
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}
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}
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if(elements.length > 0){
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if(elements.length === 1){
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value = elements[0];
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}else{
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value = elements;
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}
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}
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}
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return value; //String||Array||XmlElement
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},
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setPropertyValue: function(/*String*/property, /*String||Array||XmlElement*/value){
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// summary:
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// Store a property value
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// description:
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// If 'property' starts with '@', 'value' is set to the attribute.
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// If 'property' specifies "text()", 'value' is set as the first
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// child text.
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// If 'value' is a string, a child element of the tag name
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// specified with 'property' is created and 'value' is set as
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// the first child text of the child element.
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// Otherwise, 'value' is set to as child elements.
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// property:
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// A property name
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// value:
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// A property value
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var i;
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var text;
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if(!this.element){
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return; //undefined
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}
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if(!property){
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return; //undefined
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}
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if(property.charAt(0) == '@'){
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var attribute = property.substring(1);
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if(value){
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this.element.setAttribute(attribute, value);
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}else{
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this.element.removeAttribute(attribute);
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}
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}else if(property == "text()"){
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while(this.element.firstChild){
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this.element.removeChild(this.element.firstChild);
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}
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if(value){
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text = this._getDocument().createTextNode(value);
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this.element.appendChild(text);
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}
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}else{ // child elements
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var nextChild = null;
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var child;
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for(i = this.element.childNodes.length - 1; i >= 0; i--){
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child = this.element.childNodes[i];
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if(child.nodeType === 1 /* ELEMENT_NODE */ && child.nodeName == property){
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if(!nextChild){
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nextChild = child.nextSibling;
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}
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this.element.removeChild(child);
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}
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}
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if(value){
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if(dojo.isArray(value)){
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for(i in value){
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var e = value[i];
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if(e.element){
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this.element.insertBefore(e.element, nextChild);
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}
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}
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}else if(value instanceof dojox.wire.ml.XmlElement){
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if(value.element){
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this.element.insertBefore(value.element, nextChild);
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}
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}else{ // assume string
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child = this._getDocument().createElement(property);
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text = this._getDocument().createTextNode(value);
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child.appendChild(text);
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this.element.insertBefore(child, nextChild);
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}
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}
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}
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},
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toString: function(){
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// summary:
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// Return a value of the first text child of the element
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// description:
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// A value of the first text child of the element is returned.
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// returns:
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// A value of the first text child of the element
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var s = "";
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if(this.element){
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var text = this.element.firstChild;
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if(text){
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s = text.nodeValue;
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}
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}
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return s; //String
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},
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toObject: function(){
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// summary:
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// Return an object representation of the element
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// description:
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// An object with properties for child elements, attributes and
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// text is returned.
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// returns:
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// An object representation of the element
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if(!this.element){
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return null; //null
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}
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var text = "";
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var obj = {};
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var elements = 0;
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var i;
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for(i = 0; i < this.element.childNodes.length; i++){
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var child = this.element.childNodes[i];
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if(child.nodeType === 1 /* ELEMENT_NODE */){
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elements++;
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var o = new dojox.wire.ml.XmlElement(child).toObject();
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var name = child.nodeName;
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var p = obj[name];
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if(!p){
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obj[name] = o;
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}else if(dojo.isArray(p)){
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p.push(o);
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}else{
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obj[name] = [p, o]; // make them array
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}
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}else if(child.nodeType === 3 /* TEXT_NODE */ ||
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child.nodeType === 4 /* CDATA_SECTION_NODE */){
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text += child.nodeValue;
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}
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}
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var attributes = 0;
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if(this.element.nodeType === 1 /* ELEMENT_NODE */){
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attributes = this.element.attributes.length;
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for(i = 0; i < attributes; i++){
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var attr = this.element.attributes[i];
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obj["@" + attr.nodeName] = attr.nodeValue;
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}
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}
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if(elements === 0){
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if(attributes === 0){
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// text only
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return text; //String
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}
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// text with attributes
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obj["text()"] = text;
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}
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// else ignore text
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return obj; //Object
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},
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_getDocument: function(){
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// summary:
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// Return a DOM document
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// description:
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// If 'element' is specified, a DOM document of the element is
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// returned.
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// Otherwise, a DOM document is created.
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// returns:
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// A DOM document
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if(this.element){
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return (this.element.nodeType == 9 /* DOCUMENT_NODE */ ?
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this.element : this.element.ownerDocument); //Document
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}else{
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return dojox.xml.parser.parse(); //Document
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}
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}
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});
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